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part
of t
his
man
ual m
ay b
e co
pied
, tra
nscr
ibed
, tra
nsla
ted
or r
epro
duce
d in
an
y m
anne
r or f
orm
wha
tsoe
ver,
for c
omm
erci
al p
urpo
ses,
with
out o
btai
ning
prio
r w
ritte
n pe
rmis
sion
fro
m Q
-MA
C E
lect
roni
cs P
ty L
td.
How
ever
, lim
ited
copy
ing
is
perm
itted
for p
rivat
e us
e pr
ovid
ing
auth
orsh
ip is
ack
now
ledg
ed.
© 2
006
Q-M
AC
Ele
ctro
nics
Pty
Ltd
.
Rev
isio
n da
te:
June
200
6 Li
tera
ture
Ref
eren
ce:
vhf-9
0m u
ser g
uide
- 08
boo
kfol
d.do
c
VH
F-90
M U
ser G
uide
page
60
Q-M
AC
Ele
ctro
nics
Pty
Ltd
VH
F-90
M U
ser G
uide
Q-M
AC
Ele
ctro
nics
Pty
Ltd
C
onte
nts
1
CO
NTE
NTS
1.In
trod
uctio
n...
......
......
......
......
......
......
......
......
......
......
......
......
......
......
..41.
1.A
bout
Thi
s G
uide
......
......
......
......
......
......
......
......
......
......
......
......
......
41.
2.G
loss
ary
of T
erm
s...
......
......
......
......
......
......
......
......
......
......
......
......
.4
2.O
verv
iew
Of T
he V
HF-
90M
......
......
......
......
......
......
......
......
......
......
.....5
2.1.
Wha
t is
Low
Ban
d VH
F?...
......
......
......
......
......
......
......
......
......
......
...6
2.2.
Mod
es o
f Com
mun
icat
ion.
......
......
......
......
......
......
......
......
......
......
....7
2.2.
1Le
gacy
Mod
e....
......
......
......
......
......
......
......
......
......
......
......
......
....7
2.2.
2E
ncry
pted
Fix
ed F
requ
ency
......
......
......
......
......
......
......
......
......
...7
2.2.
3Fr
ee C
hann
el S
earc
h...
......
......
......
......
......
......
......
......
......
......
....7
2.2.
4Fr
eque
ncy
Hop
ping
......
......
......
......
......
......
......
......
......
......
......
....7
3.B
asic
Ope
ratio
n of
the
VHF-
90M
......
......
......
......
......
......
......
......
......
.93.
1.Fr
ont P
anel
Dis
play
......
......
......
......
......
......
......
......
......
......
......
......
..93.
1.1
Def
ault
Dis
play
......
......
......
......
......
......
......
......
......
......
......
......
.....9
3.1.
2A
utom
atic
Dis
play
Tim
e-ou
t....
......
......
......
......
......
......
......
......
.....9
3.2.
Fron
t Pan
el C
ontro
ls...
......
......
......
......
......
......
......
......
......
......
......
....9
3.2.
1Pu
sh O
n/O
ff Sw
itch
......
......
......
......
......
......
......
......
......
......
......
..10
3.2.
2Vo
lum
e C
ontro
l Kno
b...
......
......
......
......
......
......
......
......
......
......
..13
3.2.
3C
hann
el u
p/do
wn
Scro
ll Ke
ys...
......
......
......
......
......
......
......
......
.13
3.2.
4S
elec
ting
a C
omm
unic
atio
n M
ode
......
......
......
......
......
......
......
...14
3.3.
Mak
ing
a C
all..
......
......
......
......
......
......
......
......
......
......
......
......
......
..15
3.3.
1H
ow to
Mak
e a
Voic
e C
all..
......
......
......
......
......
......
......
......
......
..15
3.3.
2N
ATO
Pho
netic
Alp
habe
t....
......
......
......
......
......
......
......
......
......
.16
3.3.
3To
Beg
in C
omm
unic
atio
n....
......
......
......
......
......
......
......
......
......
.16
3.3.
4V
iew
ing
the
Tran
smit
Freq
uenc
y....
......
......
......
......
......
......
......
..17
3.4.
Eras
e Fu
nctio
n....
......
......
......
......
......
......
......
......
......
......
......
......
....1
7
4.M
odes
of C
omm
unic
atio
ns...
......
......
......
......
......
......
......
......
......
.....1
94.
1.Le
gacy
Mod
e...
......
......
......
......
......
......
......
......
......
......
......
......
......
.19
4.1.
1Ba
sic
Des
crip
tion.
......
......
......
......
......
......
......
......
......
......
......
.....1
9
VH
F-90
M U
ser G
uide
Con
tent
s 2
Q-M
AC
Ele
ctro
nics
Pty
Ltd
4.1.
215
0Hz
Sque
lch
Syst
em (C
TCSS
)....
......
......
......
......
......
......
......
194.
1.3
Stan
dard
Squ
elch
Sys
tem
......
......
......
......
......
......
......
......
......
....1
94.
2.Se
cure
Mod
es...
......
......
......
......
......
......
......
......
......
......
......
......
......
204.
2.1
Ove
rvie
w o
f Sec
ure
Mod
es...
......
......
......
......
......
......
......
......
.....2
04.
2.2
Enc
rypt
ed F
ixed
Fre
quen
cy...
......
......
......
......
......
......
......
......
....2
24.
2.3
Free
Cha
nnel
Sea
rch
(FC
S)...
......
......
......
......
......
......
......
......
...22
4.2.
4Fr
eque
ncy
Hop
ping
......
......
......
......
......
......
......
......
......
......
......
..23
5.A
dvan
ced
Ope
ratio
n of
the
VHF-
90M
......
......
......
......
......
......
......
...28
5.1.
Cha
nnel
Sca
nnin
g M
ode
(SC
AN)..
......
......
......
......
......
......
......
......
.28
5.2.
Varia
ble
Freq
uenc
y D
ispl
ay...
......
......
......
......
......
......
......
......
......
...28
5.3.
Whi
sper
Mod
e....
......
......
......
......
......
......
......
......
......
......
......
......
.....2
95.
4.S
elec
tive
Cal
ling
(Sel
call)
......
......
......
......
......
......
......
......
......
......
...29
5.4.
1D
TMF
Han
dset
......
......
......
......
......
......
......
......
......
......
......
......
...29
5.4.
2S
endi
ng a
Sel
call.
......
......
......
......
......
......
......
......
......
......
......
.....3
05.
4.3
Selc
all R
esen
d...
......
......
......
......
......
......
......
......
......
......
......
......
325.
4.4
Rec
eivi
ng a
Sel
call.
......
......
......
......
......
......
......
......
......
......
......
..32
5.4.
5S
elca
ll Fu
nctio
n Su
mm
ary
......
......
......
......
......
......
......
......
......
...33
5.5.
Rec
eive
d S
igna
l Stre
ngth
Indi
cato
r (R
SSI)
......
......
......
......
......
......
335.
6.Pr
ogra
mm
ing
the
VHF-
90M
......
......
......
......
......
......
......
......
......
......
345.
6.1
PC P
rogr
amm
ing
Mod
e....
......
......
......
......
......
......
......
......
......
....3
45.
6.2
Clo
ne M
ode
......
......
......
......
......
......
......
......
......
......
......
......
......
..34
5.6.
3D
TMF
Han
dset
Fie
ld P
rogr
amm
ing
......
......
......
......
......
......
......
.35
6.VH
F-90
M A
cces
sorie
s...
......
......
......
......
......
......
......
......
......
......
......
.41
6.1.
Batte
ries.
......
......
......
......
......
......
......
......
......
......
......
......
......
......
.....4
16.
2.D
ocki
ng S
tatio
n....
......
......
......
......
......
......
......
......
......
......
......
......
...42
6.2.
1S
tart
Up
Seq
uenc
e...
......
......
......
......
......
......
......
......
......
......
......
426.
2.2
Shut
Dow
n Se
quen
ce...
......
......
......
......
......
......
......
......
......
......
..43
6.2.
3S
ettin
g th
e V
DS
-90M
into
By-
Pass
Mod
e...
......
......
......
......
......
.43
6.3.
Boo
ster
Am
plifi
er...
......
......
......
......
......
......
......
......
......
......
......
......
.43
6.4.
Batte
ry C
harg
er...
......
......
......
......
......
......
......
......
......
......
......
......
...43
6.4.
1A
C/D
C C
harg
er...
......
......
......
......
......
......
......
......
......
......
......
.....4
4
VH
F-90
M U
ser G
uide
Q-M
AC
Ele
ctro
nics
Pty
Ltd
pa
ge59
12.
NO
TES
VH
F-90
M U
ser G
uide
page
58
Q-M
AC
Ele
ctro
nics
Pty
Ltd
11.
FUR
THER
REA
DIN
G
Oth
er p
ublic
atio
ns a
nd d
ocum
ents
pro
duce
d by
Q-M
AC in
clud
e:
V
HF-
90M
Tec
hnic
al M
anua
l
V
DS
-90M
Veh
icul
ar D
ocki
ng S
tatio
n
V
HF-
50M
50W
Boo
ster
Am
plifi
er
V
HF-
90M
Pro
gram
min
g P
acka
ge Q
uick
Ref
eren
ce G
uide
V
HF-
90M
Veh
icle
Pac
kage
Qui
ck R
efer
ence
Gui
de
In a
dditi
on to
the
abov
e, Q
-MA
C c
an s
uppl
y D
ata
Shee
ts o
n th
e va
rious
VH
F-90
M
pack
ages
and
acc
esso
ries
whi
ch a
re a
vaila
ble.
Ple
ase
cont
act
Q-M
AC
or
its
repr
esen
tativ
es fo
r fur
ther
det
ails
.
VH
F-90
M U
ser G
uide
Q-M
AC
Ele
ctro
nics
Pty
Ltd
C
onte
nts
3
7.C
onfig
urat
ions
......
......
......
......
......
......
......
......
......
......
......
......
......
....4
77.
1.M
anpa
ck/M
anpo
rtabl
e...
......
......
......
......
......
......
......
......
......
......
.....4
77.
1.1
Ante
nna
......
......
......
......
......
......
......
......
......
......
......
......
......
......
..48
7.2.
Vehi
cula
r....
......
......
......
......
......
......
......
......
......
......
......
......
......
......
.49
7.2.
1V
HF-
50M
Boo
ster
Am
plifi
er...
......
......
......
......
......
......
......
......
....4
97.
2.2
VD
S-9
0M D
ocki
ng S
tatio
n...
......
......
......
......
......
......
......
......
......
497.
2.3
Inst
allin
g th
e V
HF-
90M
Veh
icle
Pac
kage
......
......
......
......
......
.....4
97.
2.4
Pos
ition
ing
the
VH
F-90
M V
ehic
le P
acka
ge...
......
......
......
......
....5
07.
2.5
VHF-
90M
Veh
icle
Ant
enna
......
......
......
......
......
......
......
......
......
...50
7.3.
Base
Sta
tion
......
......
......
......
......
......
......
......
......
......
......
......
......
.....5
17.
3.1
VH
F-50
M P
ower
Am
plifi
er...
......
......
......
......
......
......
......
......
......
.51
7.3.
2V
DS
-90M
Doc
king
Sta
tion
......
......
......
......
......
......
......
......
......
...51
7.3.
3P
ower
Sup
ply
Uni
t.....
......
......
......
......
......
......
......
......
......
......
.....5
17.
3.4
Bas
e S
tatio
n D
isco
ne A
nten
na...
......
......
......
......
......
......
......
.....5
1
8.C
onst
ruct
ion
of th
e VH
F-90
M...
......
......
......
......
......
......
......
......
......
.52
8.1.
Pre
ssur
e Te
stin
g Po
rt...
......
......
......
......
......
......
......
......
......
......
......
528.
2.H
ands
et C
onne
ctor
(Fro
nt P
anel
).....
......
......
......
......
......
......
......
....5
38.
3.P
ower
Con
nect
or (R
ear P
anel
)....
......
......
......
......
......
......
......
......
..53
9.Te
chni
cal s
peci
ficat
ions
......
......
......
......
......
......
......
......
......
......
......
54
10.
Acc
esso
ries.
......
......
......
......
......
......
......
......
......
......
......
......
......
......
..57
11.
Furt
her R
eadi
ng...
......
......
......
......
......
......
......
......
......
......
......
......
.....5
8
12.
Not
es...
......
......
......
......
......
......
......
......
......
......
......
......
......
......
......
.....5
9
VH
F-90
M U
ser G
uide
page
4Q
-MA
C E
lect
roni
cs P
ty L
td
1.
INTR
OD
UC
TIO
N
1.1.
A
bout
Thi
s G
uide
Th
is
guid
e pr
ovid
es
info
rmat
ion
to
ensu
re
optim
um
perfo
rman
ce
from
th
e V
HF-
90M
.
This
gui
de d
escr
ibes
how
to s
et u
p an
d op
erat
e a
fixed
freq
uenc
y m
ode
radi
o an
d a
frequ
ency
hop
ping
radi
o ne
twor
k. It
incl
udes
full
prog
ram
min
g an
d co
nfig
urat
ion
deta
ils fo
r a V
HF-
90M
.
It al
so c
onta
ins
an A
ppen
dix
deta
iling
Fiel
d an
d PC
Pro
gram
min
g.
1.2.
G
loss
ary
of T
erm
s A
NT
Ant
enna
B
ITE
B
uilt
In T
est E
quip
men
t C
TCS
S
Con
tinuo
us T
one
Cod
ed S
quel
ch S
yste
m
DE
S
Dig
ital E
ncry
ptio
n S
tand
ard
DS
P
Dig
ital S
igna
l Pro
cess
or
DTM
F D
ual T
one
Mul
ti Fr
eque
ncy
(touc
h-pa
d)
EC
CM
E
lect
roni
c C
ount
er C
ount
er M
easu
res
EC
M
Ele
ctro
nic
Cou
nter
Mea
sure
s E
SM
E
lect
roni
c S
uppo
rt M
easu
res
EW
E
lect
roni
c W
arfa
re
FCS
Fr
ee C
hann
el S
earc
h FE
C
Forw
ard
Err
or C
orre
ctio
n FM
Fr
eque
ncy
Mod
ulat
ion
FSK
Fr
eque
ncy
Shi
ft K
eyin
g H
z H
ertz
(mea
sure
of f
requ
ency
) ID
Id
entif
icat
ion
kHz
Kilo
hertz
(mea
sure
of f
requ
ency
) LR
RP
Lo
ng R
ange
Rec
onna
issa
nce
Pat
rol
MH
z M
egah
ertz
(mea
sure
of f
requ
ency
) P
C
Per
sona
l Com
pute
r P
CB
P
rinte
d C
ircui
t Boa
rd
PTT
P
ush
to T
alk
RS
SI
Rec
eive
d S
igna
l Stre
ngth
Indi
cato
r V
HF
Ver
y H
igh
Freq
uenc
y
VH
F-90
M U
ser G
uide
Q-M
AC
Ele
ctro
nics
Pty
Ltd
pa
ge57
10.
AC
CES
SOR
IES
Q-M
AC s
uppl
ies
a co
mpl
ete
rang
e of
sup
port
acce
ssor
ies
for
the
VH
F-90
M
whe
ther
the
VH
F-90
M i
s us
ed a
s a
porta
ble,
veh
icle
-mou
nt,
mas
ter
stat
ion,
or
mul
ti-ro
le V
HF-
90M
. Som
e of
the
acce
ssor
ies
incl
ude:
A
nten
nas,
por
tabl
e, v
ehic
le a
nd m
aste
r sta
tion.
B
atte
ries
- rec
harg
eabl
e an
d no
n-re
char
geab
le.
B
atte
ry c
harg
ers
- mai
ns p
ower
, veh
icle
bat
tery
, sol
ar a
nd h
and
held
.
M
ains
pow
er s
uppl
y un
its.
E
xter
nal s
peak
ers
c/w
aud
io m
ute
(squ
elch
) fac
ility
.
V
ehic
le In
stal
latio
n K
its.
R
ebro
/Rem
ote
cont
rol K
its.
B
oost
er A
mpl
ifier
s
Ple
ase
cont
act
Q-M
AC
or
its
re
pres
enta
tives
fo
r m
ore
info
rmat
ion
on
the
acce
ssor
ies
avai
labl
e.
VH
F-90
M U
ser G
uide
page
56
Q-M
AC
Ele
ctro
nics
Pty
Ltd
ECC
M P
aram
eter
s
Sec
ure
Mod
es
Com
sec
– D
igita
l Enc
rypt
ed F
ixed
Fre
quen
cy
Tran
sec
– D
igita
l Enc
rypt
ed F
requ
ency
Hop
ping
Mod
e
FCS
– D
igita
l Enc
rypt
ed F
ree
Cha
nnel
Sea
rch
Hop
Rat
e 10
0 ho
ps p
er s
econ
d
Hop
Seq
uenc
e P
seud
o-ra
ndom
Hop
Alg
orith
m
DE
S
Hop
Ban
dwid
th
6.4M
Hz
Hop
Syn
chro
nisa
tion
Inau
dibl
e S
ynch
bur
st fr
om M
aste
r Sta
tion
Late
Ent
ry
Pos
sibl
e
VHF-
50M
Am
plifi
er S
peci
ficat
ions
Out
put P
ower
50
W ±
0.5
dB
Har
mon
ic R
adia
tion
-60d
B
Spu
rious
Em
issi
on
-65d
B
Freq
uenc
y R
ange
30
-88M
Hz
Pow
er S
uppl
y 11
-30V
DC
Fron
t Pan
el C
onne
ctio
n R
F In
, Ant
enna
Out
, VD
S C
ontro
l In,
Aux
(A
udio
and
PTT
In a
nd A
udio
Out
), D
C In
put.
Indi
cato
rs
RF
Pre
sent
, DC
Sup
ply,
Fau
lt C
ondi
tion
BIT
E
Adv
ance
d m
odul
e di
agno
stic
s an
d er
ror c
ondi
tions
VDS-
90M
Doc
king
Sta
tion
Pow
er S
uppl
y 11
-30V
DC
Fron
t Pan
el C
onne
ctio
n 2nd
Han
dset
/Hea
dset
, RF
Out
, Aux
(A
udio
and
PTT
In a
nd A
udio
Out
, DC
In),
Fiel
d Te
leph
one,
Reb
ro C
ontro
l, R
emot
e C
ontro
l
BIT
E
Adv
ance
d m
odul
e di
agno
stic
s an
d er
ror c
ondi
tions
VH
F-90
M U
ser G
uide
Q-M
AC
Ele
ctro
nics
Pty
Ltd
pa
ge5
2.
OVE
RVI
EW O
F TH
E VH
F-90
M
The
illus
tratio
n ab
ove
show
s th
e V
HF-
90M
with
bat
tery
pac
k.
The
VH
F-90
M is
a s
tate
of t
he a
rt co
mm
unic
atio
n de
vice
spe
cific
ally
des
igne
d fo
r ta
ctic
al m
ilitar
y ap
plic
atio
ns.
The
VH
F-90
M i
s m
anuf
actu
red
to m
eet
MIL
STD
81
0-F,
for i
mm
ersi
on, s
hock
, vib
ratio
n, d
ust a
nd te
mpe
ratu
re e
ndur
ance
.
The
deve
lopm
ent
of t
he V
HF-
90M
rep
rese
nts
a si
gnifi
cant
bre
akth
roug
h in
the
fie
ld o
f m
ilita
ry V
HF
com
mun
icat
ions
. Fo
r th
e fir
st t
ime,
rad
io o
pera
tors
hav
e ac
cess
to
a pr
oduc
t th
at i
s af
ford
able
, ye
t of
fers
a v
ery
high
gra
de o
f vo
ice
secu
rity
and
back
war
ds c
ompa
tibili
ty.
The
VHF-
90M
is e
xtre
mel
y co
mpa
ct a
nd li
ght,
feat
urin
g on
ly e
ssen
tial c
ontro
ls to
en
sure
eas
e of
ope
ratio
n w
ith m
inim
al o
pera
tor t
rain
ing.
It is
ava
ilabl
e w
ith s
ecur
e,
jam
-res
ista
nt E
CC
M F
requ
ency
Hop
ping
, an
d le
gacy
(fix
ed f
requ
ency
) m
ode
oper
atio
n fo
r ba
ckw
ards
com
patib
ility
with
exi
stin
g fie
ld r
adio
s (e
g P
RC
77).
The
deve
lopm
ent o
f the
VH
F-90
M m
akes
ava
ilabl
e fo
r th
e fir
st ti
me,
a s
impl
e EC
CM
m
ilitar
y ta
ctic
al V
HF
trans
ceiv
er,
at a
cos
t si
gnifi
cant
ly l
ess
than
oth
er m
ilitar
y tra
nsce
iver
s.
Mili
tary
use
rs w
ill a
ppre
ciat
e th
e so
lid c
onst
ruct
ion
and
ease
of
use
of Q
-MAC
tra
nsce
iver
s. T
he m
echa
nica
l de
sign
of
the
VH
F-90
M p
rovi
des
the
fast
est
field
VH
F-90
M U
ser G
uide
page
6Q
-MA
C E
lect
roni
cs P
ty L
td
serv
ice
time,
with
onl
y fo
ur f
aste
ners
pro
vidi
ng a
cces
s to
all
mod
ules
. Th
e V
HF-
90M
is e
xtre
mel
y re
liabl
e du
e to
the
adva
nced
SM
D m
anuf
actu
ring
proc
ess
used
and
ove
rall
mec
hani
cal
desi
gn e
ffici
ency
. E
mph
asis
in
the
desi
gn o
f th
e V
HF-
90M
has
bee
n pl
aced
on
valu
e en
gine
erin
g to
ens
ure
low
cos
t of o
wne
rshi
p ov
er a
long
ser
vice
life
.
The
VH
F-90
M h
as b
een
desi
gned
with
the
tac
tical
fie
ld u
ser
in m
ind.
Onl
y es
sent
ial c
ontro
ls a
re in
clud
ed o
n th
e fro
nt p
anel
for n
orm
al o
pera
tions
. How
ever
, ad
vanc
ed p
rogr
amm
ing
func
tiona
lity
is a
vaila
ble
from
sub
men
us, i
n ei
ther
fiel
d or
P
C p
rogr
amm
ing.
Bas
ic fu
nctio
ns a
re u
seab
le w
ith a
min
imum
of t
rain
ing.
The
VHF-
90M
has
a q
ualit
y, h
igh
spec
ifica
tion
desi
gn.
It pr
ovid
es f
ull f
requ
ency
co
vera
ge
from
30
-88M
Hz
and
has
capa
city
fo
r up
to
te
n pr
e-as
sign
ed
prog
ram
med
cha
nnel
s. T
he u
nit c
an o
pera
te a
t thr
ee s
elec
ted
pow
er le
vels
up
to
5 w
atts
, whi
lst a
chie
ving
the
low
bat
tery
con
sum
ptio
n.
The
tech
nica
l spe
cific
atio
n of
the
VH
F-90
M w
ill en
able
relia
ble
com
mun
icat
ions
up
to d
ista
nces
of
10km
or
mor
e, d
epen
ding
on
ante
nna
choi
ce,
terr
ain
and
loca
l no
ise
leve
ls. I
n ad
ditio
n, th
e V
HF-
90M
exh
ibits
sup
erio
r sig
nal h
andl
ing
capa
bilit
y,
deliv
erin
g ex
celle
nt re
cept
ion
even
in th
e m
ost c
row
ded
radi
o en
viro
nmen
ts w
here
en
emy
jam
min
g is
dep
loye
d.
In s
hort,
this
rev
olut
iona
ry n
ew tr
ansc
eive
r in
corp
orat
es th
e ve
ry la
test
in R
F an
d D
SP
des
ign
tech
nolo
gy,
mak
ing
the
VH
F-90
M t
he m
ost
com
pact
, ve
rsat
ile,
high
pe
rform
ance
VH
F Fr
eque
ncy
Hop
ping
tran
scei
ver a
vaila
ble
in th
e m
ilitar
y m
arke
t. It
is s
uita
ble
for
man
pack
, veh
icle
and
bas
e st
atio
n ro
les
thro
ugh
the
addi
tion
of
dock
ing
stat
ion.
2.1.
W
hat i
s Lo
w B
and
VHF?
V
HF
(Ver
y H
igh
Freq
uenc
y) is
the
par
t of
the
radi
ofre
quen
cy s
pect
rum
bet
wee
n 30
and
300
MH
z. T
he p
ortio
n of
spe
ctru
m b
etw
een
30 a
nd 8
8MH
z is
kno
wn
as
Low
Ban
d V
HF.
For
tact
ical
pur
pose
s, it
has
the
high
ly d
esira
ble
prop
erty
of g
ivin
g B
LOS
(bey
ond
line
of s
ight
) pro
paga
tion
perm
ittin
g co
mm
unic
atio
n ov
er v
eget
ated
or
urb
an te
rrai
n. It
is m
arke
dly
supe
rior
to H
igh
Ban
d V
HF
and
UH
F in
its
nativ
e ca
pabi
lity
and
does
no
t de
pend
up
on
repe
ater
s to
th
e sa
me
degr
ee.
Con
sequ
ently
, it i
s at
tract
ive
for
mili
tary
use
whe
re p
rote
ctio
n of
rep
eate
r as
sets
m
ay b
e pr
oble
mat
ic.
VH
F-90
M U
ser G
uide
Q-M
AC
Ele
ctro
nics
Pty
Ltd
pa
ge55
Tran
smis
sion
Spe
cific
atio
ns
Out
put P
ower
3
Leve
ls. H
i 5 W
, Med
0.5
wat
t, Lo
50m
W
Freq
uenc
y S
tabi
lity
± 2.
5ppm
Dev
iatio
n Fa
ctor
y S
etta
ble
± 3k
Hz
to ±
7kH
z
Mod
ulat
ion
FM (F
3E) i
n Le
gacy
Mod
e
Har
mon
ic R
adia
tion
-50d
B
Spu
rious
Em
issi
on
-55d
B
Inte
rmed
iate
Fre
quen
cies
13
0.05
0MH
z an
d 45
5kH
z
Rec
eive
Spe
cific
atio
ns
Rec
eive
r Sen
sitiv
ity
-116
dBm
for 1
2dB
SIN
AD
Blo
ckin
g
>85d
B
Adj
acen
t Cha
nnel
Sup
pres
sion
+7
0dB
Imag
e S
uppr
essi
on
+80d
B
Spu
rious
Sup
pres
sion
>5
0dB
AF
Out
put
150m
W @
2%
dis
torti
on
Squ
elch
15
0Hz
Tone
(PR
C-7
7 C
ompa
tible
) an
d S
igna
l Thr
esho
ld in
Dig
ital M
odes
Mec
hani
cal a
nd E
nviro
nmen
tal S
peci
ficat
ions
Wei
ght
1kg
with
Bat
tery
Pac
k
Dim
ensi
ons
82 x
223
x 5
4mm
Tem
pera
ture
O
pera
ting
-20°
C to
+60
°C
Sto
rage
-30°
C to
+80
°C
Imm
ersi
on
Per
Mil-
Std
810F
Dro
p P
er M
il-St
d 81
0F
Vib
ratio
n P
er M
il-St
d 81
0F
Con
stru
ctio
n A
lum
iniu
m E
xtru
sion
Bod
y, I
njec
tion
Mou
lded
Alu
min
ium
Fro
nt a
nd R
ear
End
Cap
s, H
igh
Impa
ct L
exan
® M
ould
ed B
atte
ry C
asin
g
VH
F-90
M U
ser G
uide
page
54
Q-M
AC
Ele
ctro
nics
Pty
Ltd
9.
TEC
HN
ICA
L SP
ECIF
ICA
TIO
NS
Gen
eral
Spe
cific
atio
ns
Freq
uenc
y R
ange
30
-88M
Hz
Cha
nnel
Res
olut
ion
25kH
z (2
320
Cha
nnel
s)
Pre
-Pro
gram
med
Cha
nnel
s 10
Sel
ectiv
e C
allin
g N
umer
ic In
divi
dual
and
Gro
up C
all
Pow
er S
uppl
y 12
V D
C
Bat
terie
s 10
x 1
.2V
DC
NiM
H B
atte
ry
Bat
tery
End
uran
ce
Typi
cal 1
4 H
ours
9:1
Rx:
Tx
Pow
er C
onsu
mpt
ion
Tran
smit
@5W
1.5
A
Rec
eive
150
mA
Sta
ndby
20m
A
Whi
sper
-2
0dB
und
er n
omin
al le
vel
Squ
elch
15
0Hz
Tone
Squ
elch
in L
egac
y M
ode
Dig
ital L
evel
Squ
elch
in S
ecur
e M
odes
Sec
ure
Mod
es
Tran
sec
– D
igita
l Enc
rypt
ed F
ixed
Fre
quen
cy
Com
sec
– D
igita
l E
ncry
pted
Fre
quen
cy H
oppi
ng &
Dig
ital
Enc
rypt
ed F
ree
Cha
nnel
Sea
rch
Aud
io C
odin
g D
SP
Bas
ed
Ant
enna
5/
16” 2
6TP
I Scr
ew T
hrea
d (C
ompa
tible
with
PR
C-2
5, P
RC
-77
Ant
enna
.
1m T
ape
Whi
p, 6
Sec
tion
3m
Col
laps
ible
Whi
p, 3
00m
m F
lexi
ble
Rub
ber
Ant
enna
Con
trols
S
haft
Enc
oder
(V
olum
e,
ON
/OFF
an
d A
dvan
ced
Men
u C
ontro
l),
Cha
nnel
U
p/D
own,
Sec
ure
On/
Off,
Hop
On/
Off
Dis
play
H
igh
Rel
iabi
lity
5 D
igit
7 S
egm
ent
LED
w
ith
prog
ram
mab
le
blan
king
an
d Fr
eque
ncy/
Cha
nnel
dis
play
.
Pro
gram
min
g Fi
eld
Pro
gram
min
g vi
a D
TMF
Key
pad,
P
C
Pro
gram
min
g vi
a R
S23
2 an
d Te
rmin
al E
mul
atio
n an
d W
indo
ws
PC
Pro
gram
min
g S
oftw
are
and
Fill
Gun
.
BIT
E
Adv
ance
d m
odul
e di
agno
stic
s an
d er
ror c
ondi
tions
MTT
R
10 M
inut
es
MTB
F 80
00 H
ours
VH
F-90
M U
ser G
uide
Q-M
AC
Ele
ctro
nics
Pty
Ltd
pa
ge7
2.2.
M
odes
of C
omm
unic
atio
n
2.2.
1 Le
gacy
Mod
e Fi
xed
frequ
ency
mod
e is
ofte
n re
ferre
d to
as
lega
cy m
ode.
Old
er t
actic
al V
HF
tact
ical
rad
ios
such
as
PRC
-77,
ope
rate
d in
par
t of
the
30-
88M
Hz
band
with
50
kHz
or 2
5kH
z ch
anne
l spa
cing
. Th
ey a
lso
used
a 1
50H
z su
b au
dibl
e sq
uelc
h pi
lot
tone
. Th
ese
faci
litie
s ar
e in
clud
ed in
the
VH
F-90
M t
o pr
ovid
e co
mpa
tibili
ty
with
th
ese
radi
os.
It ha
s th
e sa
me
feat
ures
bu
t w
ith
supe
rior
oper
atin
g pe
rform
ance
with
out c
ompl
ex c
ontro
ls a
nd o
pera
ting
syst
ems.
2.2.
2 En
cryp
ted
Fixe
d Fr
eque
ncy
2.2.
3 Fr
ee C
hann
el S
earc
h Th
e Fr
ee C
hann
el S
earc
h m
ode
will
sca
n a
set
of t
en p
rogr
amm
ed c
hann
els
in
orde
r to
dete
rmin
e th
e lo
wes
t RS
SI w
ithin
the
chan
nels
. The
FC
S m
ode
will
bui
ld
a dy
nam
ic t
able
of
all t
he c
hann
el R
SSI
sign
als,
whi
lst
scan
ning
for
the
uni
que
pres
ence
of a
com
patib
le V
HF-
90M
tran
smitt
ing
on o
ne o
f the
sca
nned
cha
nnel
s.
If a
valid
tra
nsm
itter
ID
is
foun
d, t
he u
nit
will
dec
ode
the
info
rmat
ion
on t
hat
chan
nel a
nd re
mai
n on
the
chan
nel f
or th
e ch
anne
l tim
eout
tim
e.
This
mod
e ca
n be
ena
bled
or d
isab
led
by b
riefly
pre
ssin
g th
e O
N/O
FF b
utto
n an
d th
e S
EC
key
at t
he s
ame
time.
Whe
n a
VH
F-90
M is
tran
smitt
ing,
the
unit
will
trans
mit
on o
ne o
f the
four
low
est
RS
SI c
hann
els
in o
rder
to im
prov
e se
curit
y. T
he c
hann
el th
at is
sel
ecte
d w
ill be
a
rand
om
choi
ce
of
thes
e ch
anne
ls
from
th
e dy
nam
ic
RS
SI
tabl
e.
Afte
r tra
nsm
issi
on,
it w
ill r
emai
n on
the
cha
nnel
afte
r th
e P
TT p
erio
d fo
r th
e ch
anne
l tim
eout
tim
e an
d th
en b
egin
sca
nnin
g ag
ain.
2.2.
4 Fr
eque
ncy
Hop
ping
C
onve
ntio
nal f
ixed
fre
quen
cy r
adio
s ar
e de
sign
ed t
o tra
nsm
it an
d re
ceiv
e on
a
sing
le f
ixed
cha
nnel
. Th
is m
akes
the
m v
ulne
rabl
e to
Ele
ctro
nic
War
fare
(EW
) te
chni
ques
suc
h as
int
erce
ptio
n an
d ja
mm
ing.
Int
erce
ptio
n is
the
una
utho
rised
m
onito
ring
of ra
dio
traffi
c, w
hich
may
pla
ce th
e op
erat
or a
t a s
ever
e di
sadv
anta
ge.
Jam
min
g is
the
delib
erat
e di
srup
tion
of c
omm
unic
atio
n by
ope
ratin
g a
trans
mitt
er
(jam
mer
) on
the
sam
e fre
quen
cy a
s th
e ra
dio
traffi
c. W
hils
t sc
ram
bler
s an
d sp
eech
enc
rypt
ion
devi
ces
may
pro
vide
som
e de
gree
of r
esis
tanc
e to
the
thre
at o
f in
terc
eptio
n, th
ey a
re in
effe
ctiv
e ag
ains
t jam
mer
s, b
ecau
se th
ey s
till o
pera
te o
n a
VH
F-90
M U
ser G
uide
page
8Q
-MA
C E
lect
roni
cs P
ty L
td
sing
le, f
ixed
freq
uenc
y. F
urth
erm
ore,
a s
cram
bled
/ en
cryp
ted
frequ
ency
net
wor
k w
ill ac
tual
ly
attra
ct
jam
min
g si
nce
it is
ob
viou
sly
carr
ying
se
nsiti
ve
traffi
c.
Freq
uenc
y ho
ppin
g is
the
onl
y ef
fect
ive
coun
ter
mea
sure
to
both
for
ms
of
elec
troni
c at
tack
.
2.2.
4.1
Freq
uenc
y H
oppi
ng A
pplic
atio
ns
The
radi
o is
des
igne
d fo
r m
ilita
ry a
nd p
aram
ilita
ry u
sers
who
req
uire
VH
F co
mm
unic
atio
ns fo
r ta
ctic
al u
se o
n th
e ba
ttlef
ield
, in
rura
l or
urba
n en
viro
nmen
ts.
It is
sui
tabl
e fo
r use
in th
eatre
s w
here
ES
M a
nd E
CM
ass
ets
have
bee
n de
ploy
ed
by th
e en
emy.
It is
als
o us
eful
to a
id a
nd r
elie
f org
anis
atio
ns a
nd o
bser
ver
agen
cies
, whi
chm
aybe
ser
ious
ly c
ompr
omis
ed in
thei
r ope
ratio
ns, t
hrou
gh in
terc
eptio
n an
d ja
mm
ing
of
radi
o tra
ffic
from
ele
men
ts w
ithin
a te
chni
cally
aw
are
popu
latio
n.
A g
row
ing
prob
lem
for m
ilitar
y an
d ai
d or
gani
satio
ns is
the
prol
ifera
tion
of lo
w c
ost
amat
eur
VH
F ra
dios
and
sca
nner
s, w
hich
can
be
easi
ly m
odifi
ed fo
r in
terc
eptio
n an
d ja
mm
ing.
The
VH
F-90
M,
with
fre
quen
cy h
oppi
ng,
pres
ents
an
imm
edia
te,
cost
effe
ctiv
e so
lutio
n to
thes
e pr
oble
ms.
VH
F-90
M U
ser G
uide
Q-M
AC
Ele
ctro
nics
Pty
Ltd
pa
ge53
8.2.
H
ands
et C
onne
ctor
(Fro
nt P
anel
)
8.3.
Po
wer
Con
nect
or (R
ear P
anel
)
Ext
Aud
io In
put
Bat
tery
+ve
Tran
smit
Dat
a B
atte
ry -v
e
Rec
eive
Dat
a A
udio
Out
put
Ext
erna
l RF
Inpu
t/ O
utpu
t
Ven
t Tes
t Hol
es
Spe
aker
Out
put
Con
trol/T
rans
mit
Dat
a
Pus
h to
Tal
k (/P
TT)/R
ecei
ve D
ata
Mic
roph
one
Inpu
t
Pow
er O
ut +
5 vo
lts (1
00m
A m
ax)
Gro
und
(Bat
tery
–ve
)
VH
F-90
M U
ser G
uide
page
52
Q-M
AC
Ele
ctro
nics
Pty
Ltd
8.
CO
NST
RU
CTI
ON
OF
THE
VHF-
90M
8.1.
Pr
essu
re T
estin
g Po
rt
Ther
e is
a P
ress
ure
Test
ing
Por
t lo
cate
d in
side
the
bat
tery
com
partm
ent
on t
he
mai
n bo
dy o
f th
e V
HF-
90M
. Th
is is
use
d fo
r im
mer
sion
tes
ting
and
mus
t no
t be
ta
mpe
red
with
in a
ny w
ay e
xcep
t for
pre
ssur
e te
stin
g.
The
unit
has
been
imm
ersi
on t
este
d up
to
a de
pth
of o
ne m
etre
as
per
met
hod
512.
4 of
the
Milit
ary
Sta
ndar
d M
ILS
TD-8
10F.
Whe
n pr
essu
re te
stin
g th
e V
HF-
90M
, a p
ress
ure
of 5
psi o
ver a
tmos
pher
ic s
houl
d be
app
lied
over
a p
erio
d of
two
min
utes
.
Pre
ssur
e te
st P
ort
VH
F-90
M U
ser G
uide
Q-M
AC
Ele
ctro
nics
Pty
Ltd
pa
ge9
3.
BA
SIC
OPE
RA
TIO
N O
F TH
E VH
F-90
M
3.1.
Fr
ont P
anel
Dis
play
3.1.
1 D
efau
lt D
ispl
ay
The
defa
ult d
ispl
ay o
n th
e V
HF-
90M
will
show
the
rece
ive
frequ
ency
in u
se. T
his
defa
ult
disp
lay
is a
lway
s pr
eced
ed b
y th
e cu
rren
t di
spla
y co
mm
and
in o
pera
tion
(whi
ch ti
mes
out
afte
r app
roxi
mat
ely
two
seco
nds)
.
The
VH
F-90
M
will
alw
ays
reve
rt to
a
defa
ult
disp
lay
in
the
follo
win
g ci
rcum
stan
ces:
W
hen
it is
firs
t sw
itche
d on
, or
W
hen
a fu
nctio
n ha
s be
en c
ance
lled,
or
W
hen
a fu
nctio
n ha
s au
tom
atic
ally
tim
ed o
ut.
3.1.
2 A
utom
atic
Dis
play
Tim
e-ou
t Th
e V
HF-
90M
inco
rpor
ates
an
auto
mat
ic d
ispl
ay ti
me-
out f
acilit
y, w
hich
app
lies
to
the
use
of m
ost a
dvan
ced
func
tions
with
in th
e se
t (in
clud
ing
send
ing
Sel
calls
).
The
time-
out f
acilit
y w
ill ta
ke e
ffect
onc
e a
func
tion
key
from
the
DTM
F ke
ypad
on
the
hand
set h
as b
een
pres
sed.
Onc
e th
e fu
nctio
n is
com
plet
ed, o
r if
anot
her
key
is n
ot p
ress
ed,
the
disp
lay
will
auto
mat
ical
ly t
ime-
out
afte
r fiv
e se
cond
s. A
t th
is
poin
t the
VH
F-90
M w
ill re
vert
to th
e de
faul
t dis
play
. If t
he a
uto
disp
lay
OFF
has
al
so b
een
set,
then
afte
r ano
ther
six
sec
onds
the
disp
lay
will
go
off a
s in
dica
ted
by
a sc
rollin
g de
cim
al p
oint
. Any
key
pre
ss w
ill re
set t
his
mod
e. T
he a
uto
disp
lay
off
feat
ure
is d
esig
ned
for
addi
tiona
l co
vertn
ess
and
nigh
t op
erat
ions
to
avoi
d dr
awin
g en
emy
fire.
3.2.
Fr
ont P
anel
Con
trol
s Th
e fo
llow
ing
illust
ratio
n sh
ows
the
oper
atin
g co
ntro
ls o
n th
e fro
nt p
anel
of
the
VH
F-90
M. T
he n
ext S
ectio
n of
this
Gui
de (o
n pa
ge 2
8), g
ives
det
aile
d in
stru
ctio
ns
on h
ow to
use
eac
h of
thes
e co
ntro
ls.
VH
F-90
M U
ser G
uide
page
10
Q-M
AC
Ele
ctro
nics
Pty
Ltd
3.2.
1 Pu
sh O
n/O
ff Sw
itch
3.2.
1.1
Switc
hing
the
VHF-
90M
ON
To
sw
itch
the
VH
F-90
M O
N, p
ress
and
hol
d th
e m
ain
volu
me
cont
rol k
nob
for o
ne
seco
nd.
Whe
n th
e VH
F-90
M i
s sw
itche
d on
, an
aud
ible
bee
p is
hea
rd a
nd t
he
front
pan
el d
ispl
ay a
ppea
rs a
s be
low
: LED
Dis
play
Pow
er P
ush
On/
Off
&
Volu
me
Hop
ping
m
ode
On/
Off
Sec
ure
Mod
eO
n/O
ffC
hann
el
Dow
n Cha
nnel
Up
Mic
roph
one,
H
eads
et, P
TT
Con
nect
or
Ante
nna
VH
F-90
M U
ser G
uide
Q-M
AC
Ele
ctro
nics
Pty
Ltd
pa
ge51
7.3.
B
ase
Stat
ion
7.3.
1 VH
F-50
M P
ower
Am
plifi
er
The
VH
F-50
M A
mpl
ifier
is m
ount
ed in
veh
icul
ar p
latfo
rms
by a
sys
tem
kno
wn
as
inst
alla
tion
Infra
stru
ctur
e. T
his
inst
alla
tion
kit i
s de
sign
ed to
pro
tect
the
equi
pmen
t w
hen
it is
to b
e in
stal
led
in e
ither
trac
ked
or w
heel
ed m
ilitar
y pl
atfo
rms
7.3.
2 VD
S-90
M D
ocki
ng S
tatio
n Th
e pr
imar
y fu
nctio
n of
the
VD
S-90
M is
to
prov
ide
pow
er t
o th
e V
HF-
90M
and
en
able
it to
con
trol a
cces
sorie
s, w
hils
t fac
ilita
ting
its m
ount
ing
into
a B
ase
Sta
tion
or v
ehic
ular
pla
tform
. It
is d
esig
ned
to a
ccom
mod
ate
a V
HF-
90M
per
man
ently
fit
ted
to th
e un
it or
a V
HF-
90M
from
a m
anpo
rtabl
e co
nfig
urat
ion
to s
impl
y pl
ug-in
, on
ce it
s ba
ttery
pac
k is
unc
lippe
d.
7.3.
3 Po
wer
Sup
ply
Uni
t Th
e V
HF-
90M
Pow
er S
uppl
y U
nit i
s de
sign
ed to
pro
vide
the
Bas
e S
tatio
n w
ith a
co
mpa
tible
pow
er s
uppl
y su
itabl
e fo
r ru
nnin
g th
e VH
F-90
M. I
t is
avai
labl
e w
ith a
w
ide
varie
ty o
f mai
ns p
ower
con
nect
ors
for v
ario
us c
ount
ries.
7.3.
4 B
ase
Stat
ion
Dis
cone
Ant
enna
Th
e D
isco
ne
prov
ides
ei
ther
a
perm
anen
t or
se
mi-p
erm
anen
t ba
se
stat
ion
solu
tion.
It
is o
mni
-dire
ctio
nal a
nd s
uita
ble
for
shor
t to
med
ium
ran
ge v
oice
and
da
ta c
omm
unic
atio
ns.
With
a f
requ
ency
ran
ge o
f 30
-88M
Hz,
its
bro
adba
nd
char
acte
ristic
s m
ake
it su
itabl
e fo
r us
e w
ith t
he F
requ
ency
Hop
ping
mod
e of
op
erat
ion.
VH
F-90
M U
ser G
uide
page
50
Q-M
AC
Ele
ctro
nics
Pty
Ltd
7.2.
4 Po
sitio
ning
the
VHF-
90M
Veh
icle
Pac
kage
Ens
ure
that
the
VH
F-90
M is
mou
nted
in a
pos
ition
that
allo
ws
easy
acc
ess
for
oper
atio
n. T
he l
ouds
peak
er s
houl
d be
pos
ition
ed c
lose
to
whe
re t
he
oper
ator
will
sit.
Th
e V
HF-
90M
mus
t be
mou
nted
in a
pos
ition
that
allo
ws
a fre
e flo
w o
f air
over
the
exte
rnal
cas
e.
W
hen
mou
ntin
g th
e V
HF-
90M
in
a ve
hicl
e, u
se t
he Q
MA
C V
HF-
90M
M
ount
ing
Cra
dle.
Ass
embl
y in
stru
ctio
ns a
re p
rovi
ded
with
eac
h cr
adle
.
In
a
vehi
cle
inst
alla
tion,
th
e V
HF-
90M
m
ay
be
mou
nted
un
der
the
dash
boar
d of
the
veh
icle
, in
the
cen
tre c
onso
le,
up a
gain
st t
he c
entre
co
nsol
e (w
ith
the
front
pa
nel
faci
ng
upw
ard)
or
in
an
ov
erhe
ad
shel
f/con
sole
.
Th
e VH
F-90
M s
houl
d no
t be
mou
nted
on
top
of a
veh
icle
das
hboa
rd w
here
it
is e
xpos
ed to
dire
ct s
unlig
ht. I
n so
me
plac
es, t
he te
mpe
ratu
re w
ithin
a c
ar
can
reac
h te
mpe
ratu
res
in e
xces
s of
60°
C.
The
top
of t
he d
ashb
oard
is
usua
lly th
e ho
ttest
par
t of a
veh
icle
.
7.2.
5 VH
F-90
M V
ehic
le A
nten
na
This
ant
enna
is
mad
e up
of
the
QM
172M
Mili
tary
Veh
icle
Whi
p. T
he w
hip
elem
ents
are
mad
e of
hig
h te
nsile
alu
min
ium
tub
ing
and
incl
ude
bras
s an
d st
ainl
ess
stee
l fitt
ings
. The
top
sect
ion
of th
e to
p el
emen
t has
a fi
tting
allo
win
g th
e an
tenn
a to
be
pulle
d ov
er a
nd ti
ed d
own,
if re
quire
d. T
he b
ase
plat
e is
mad
e fro
m
mac
hine
d al
umin
ium
.
VH
F-90
M U
ser G
uide
Q-M
AC
Ele
ctro
nics
Pty
Ltd
pa
ge11
This
dis
play
sho
ws
the
Pro
duct
des
igna
tor o
f the
ra
dio
- VH
F-90
.
This
dis
play
is s
how
n fo
r ha
lf a
seco
nd, i
mm
edia
tely
follo
wed
by
anot
her
disp
lay
show
ing
the
fitte
d so
ftwar
e re
leas
e de
sign
ator
. For
exa
mpl
e:
This
dis
play
sho
ws:
Opt
ion
Leve
l A –
Rel
ease
1,
Ver
sion
01.
The
disp
lay
show
ing
softw
are
info
rmat
ion
will
dis
play
eac
h ch
arac
ter o
ne a
t a ti
me
with
app
roxi
mat
ely
half
a se
cond
bet
wee
n di
gits
, th
is d
ispl
ay w
ill al
so t
ime-
out
afte
r th
ree
seco
nds.
The
dis
play
will
the
n sh
ow t
he S
elca
ll ID
(4
digi
ts)
for
one
seco
nd. A
t thi
s po
int,
the
VH
F-90
M w
ill sc
an fo
r ex
tern
al d
evic
es (
Plu
g an
d P
lay)
co
nnec
ted
to
it.
Thes
e de
vice
s in
clud
e D
TMF
mic
roph
one
optio
n,
exte
rnal
R
ebro
adca
st U
nit (
calle
d “R
ebro
Uni
t” fo
r sh
ort),
Veh
icul
ar D
ocki
ng S
tatio
n an
d a
50 w
att B
oost
er A
mpl
ifier
. If t
he V
HF-
90M
find
s de
vice
s, it
will
repo
rt th
eir
devi
ce
ID o
n th
e fro
nt d
ispl
ay. D
evic
e ID
sta
tuse
s th
at c
an b
e re
porte
d on
the
disp
lay
are:
47001
DTM
F M
icro
phon
e is
con
nect
ed
47002
R
ebro
Uni
t is
conn
ecte
d
47003
V
ehic
ular
Doc
king
Sta
tion
is c
onne
cted
U1.01A
Lb-9
0
VH
F-90
M U
ser G
uide
page
12
Q-M
AC
Ele
ctro
nics
Pty
Ltd
47004
50
wat
t Boo
ster
Am
plifi
er is
con
nect
ed
rEPt
Uni
t is
in b
ack
to b
ack
repe
ater
mod
e
CLOnE
U
nit h
as b
een
dete
cted
and
is re
ady
to c
lone
bLUE
B
lue
Toot
h ad
apto
r is
pres
ent f
or p
rogr
amm
ing
FILL
A
fill
gun
is c
onne
cted
read
y fo
r pro
gram
min
g
The
VHF-
90M
will
then
reve
rt to
last
cha
nnel
/freq
uenc
y in
use
whe
n th
e ra
dio
was
sw
itche
d of
f.
If th
e au
to d
ispl
ay O
FF fu
nctio
n ha
s be
en e
nabl
ed th
e un
it w
ill tu
rn th
e di
spla
y of
f af
ter a
bout
six
sec
onds
. Thi
s m
ode
is in
dica
ted
by a
scr
ollin
g po
int o
n th
e di
spla
y.
Any
act
ivat
ion
of th
e ke
ys o
n th
e fro
nt p
anel
will
rese
t the
dis
play
to th
e ke
y th
at is
pr
esse
d st
ate.
This
dis
play
sho
ws:
Sta
ndar
d Fr
eque
ncy
Mod
e w
ith
frequ
ency
set
to 3
2.12
5MH
z.
3.2.
1.2
Switc
hing
the
VHF-
90M
OFF
To
sw
itch
the
VH
F-90
M o
ff, p
ress
and
hol
d th
e Vo
lum
e kn
ob f
or t
wo
seco
nds.
A
fter
one
seco
nd,
a co
untd
own
will
be o
n th
e di
spla
y to
sho
w w
hen
the
unit
is
goin
g to
turn
off,
con
tinue
hol
ding
the
key
until
the
unit
goes
off.
The
feat
ure
has
been
incl
uded
to a
void
fals
e de
activ
atio
n. 32.125
VH
F-90
M U
ser G
uide
Q-M
AC
Ele
ctro
nics
Pty
Ltd
pa
ge49
7.2.
Ve
hicu
lar
All
VH
F-90
Ms
that
are
pur
chas
ed a
s pa
rt of
a V
ehic
le P
acka
ge a
re s
uppl
ied
with
a
Qui
ck R
efer
ence
Gui
de, w
hich
exp
lain
s ho
w to
ach
ieve
the
best
res
ults
from
the
radi
o an
d an
tenn
a sy
stem
.
7.2.
1 VH
F-50
M B
oost
er A
mpl
ifier
Th
e V
HF-
50M
Am
plifi
er is
mou
nted
in v
ehic
ular
pla
tform
s by
a s
yste
m k
now
n as
in
stal
latio
n In
frast
ruct
ure.
Thi
s in
stal
latio
n ki
t is
desi
gned
to p
rote
ct th
e eq
uipm
ent
whe
n it
is to
be
inst
alle
d in
eith
er tr
acke
d or
whe
eled
milit
ary
plat
form
s.
7.2.
2 VD
S-90
M D
ocki
ng S
tatio
n Th
e pr
imar
y fu
nctio
n of
the
VD
S-90
M is
to
prov
ide
pow
er t
o th
e V
HF-
90M
and
en
able
it
to c
ontro
l ac
cess
orie
s, w
hils
t fa
cilit
atin
g its
mou
ntin
g on
to a
veh
icul
ar
plat
form
. It i
s de
sign
ed to
acc
omm
odat
e a
VH
F-90
M p
erm
anen
tly fi
tted
to th
e un
it or
a V
HF-
90M
from
a m
anpo
rtabl
e co
nfig
urat
ion
to s
impl
y pl
ug-in
, onc
e its
bat
tery
pa
ck is
unc
lippe
d.
7.2.
3 In
stal
ling
the
VHF-
90M
Veh
icle
Pac
kage
Fi
rstly
, dec
ide
whe
re to
mou
nt th
e V
HF-
90M
. Thi
s sh
ould
be
fixed
som
ewhe
re th
at
is b
oth
conv
enie
nt a
nd s
afe
for o
pera
tor u
se.
Exa
mpl
es o
f typ
ical
loca
tions
incl
ude
the
follo
win
g:
In
a v
ertic
al p
ositi
on, u
p ag
ains
t the
cen
tre c
onso
le, o
n th
e pa
ssen
ger s
ide.
In a
ver
tical
pos
ition
, up
agai
nst t
he re
ar o
f the
cen
tre c
onso
le.
U
nder
the
vehi
cle
dash
boar
d.
O
n th
e ro
of o
f the
veh
icle
(ins
ide)
, bet
wee
n th
e tw
o vi
sors
.
In a
n ov
erhe
ad c
onso
le.
Whe
reve
r po
ssib
le,
do n
ot m
ount
the
ant
enna
aga
inst
the
met
alw
ork
of t
he
vehi
cle,
as
this
will
res
ult
in a
loss
of
radi
ated
sig
nal.
The
best
loca
tion
will
be
subj
ect t
o th
e pa
rticu
lar
mak
e an
d m
odel
of t
he v
ehic
le, a
s w
ell a
s th
e na
ture
of
the
appl
icat
ion
and
pers
onal
pre
fere
nces
.
VH
F-90
M U
ser G
uide
page
48
Q-M
AC
Ele
ctro
nics
Pty
Ltd
7.1.
1 A
nten
na
Flex
ible
Tap
e W
hip
The
flexi
ble
tape
whi
p an
tenn
a (1
m) i
s su
ited
for
use
in j
ungl
e fo
rest
ry a
reas
. It
has
a fre
quen
cy c
over
age
betw
een
30 a
nd 8
8Mhz
an
d co
mes
co
mpl
ete
with
go
osen
eck.
To
at
tach
th
e ta
pe
whi
p an
tenn
a to
th
e V
HF-
90M
, sc
rew
the
thr
eade
d en
d of
the
an
tenn
a in
to t
he a
nten
na s
ocke
t on
the
top
le
ft of
the
VH
F-90
M.
Six
Sect
ion
Whi
p
The
colla
psib
le s
ix s
ectio
n w
hip
ante
nna
(3m
) ha
s a
frequ
ency
cov
erag
e be
twee
n 30
and
88M
Hz.
The
col
laps
ed l
engt
h is
50
0mm
. To
atta
ch t
he s
ix s
ectio
n w
hip
ante
nna
to
the
VH
F-90
M,
scre
w
the
thre
aded
en
d of
th
e an
tenn
a in
to
the
ante
nna
sock
et o
n th
e to
p le
ft on
the
V
HF-
90M
.
Shor
t Rub
ber W
hip
The
shor
t R
ubbe
r W
hip
ante
nna
(60c
m)
has
frequ
ency
cov
erag
e be
twee
n 30
and
88
MH
Z.
It is
id
eal
for
intra
-squ
ad
com
mun
icat
ions
in
cl
ose
rang
e ap
plic
atio
ns.
To a
ttach
the
Sho
rt R
ubbe
r W
hip
ante
nna
to th
e V
HF-
90M
, scr
ew th
e th
read
ed
end
of
the
ante
nna
into
th
e an
tenn
a so
cket
on
the
top
left
on th
e V
HF-
90M
.
VH
F-90
M U
ser G
uide
Q-M
AC
Ele
ctro
nics
Pty
Ltd
pa
ge13
Uni
t will
turn
OFF
in tw
o se
cond
s.
3.2.
2 Vo
lum
e C
ontr
ol K
nob
3.2.
2.1
Adj
ustin
g th
e Vo
lum
e To
incr
ease
or
decr
ease
the
volu
me
(of r
ecei
ved
sign
al)
on th
e VH
F-90
M, r
otat
e th
e V
OLU
ME
cont
rol k
nob
in a
clo
ckw
ise
or c
ount
er-c
lock
wis
e di
rect
ion.
The
VO
LUM
E c
ontro
l kno
b on
the
VH
F-90
M u
ses
an In
crem
enta
l Sha
ft E
ncod
er.
This
mea
ns t
hat
ther
e ar
e no
phy
sica
l end
stop
s w
hen
adju
stin
g th
e vo
lum
e, s
o th
at th
e kn
ob c
an b
e ro
tate
d w
ithou
t com
ing
to a
sto
p. A
s yo
u ro
tate
the
knob
you
w
ill d
etec
t th
e hi
gh/lo
w li
mits
. Th
ese
limits
are
iden
tifie
d w
hen
turn
ing
the
knob
ha
s no
affe
ct o
n th
e vo
lum
e. A
sm
all a
udib
le c
lick
occu
rs w
ith e
ach
incr
ease
and
de
crea
se o
f vo
lum
e. T
he v
olum
e in
dica
tor,
if en
able
d, w
ill sh
ow t
he m
axim
um
read
ing
of 3
0 an
d m
inim
um o
f 0.
3.2.
3 C
hann
el u
p/do
wn
Scro
ll K
eys
3.2.
3.1
Sele
ctin
g a
Pre-
prog
ram
med
Cha
nnel
W
hen
the
radi
o is
dis
play
ing
the
frequ
ency
in
use,
it
is n
eces
sary
to
pres
s a
CH
AN k
ey in
ord
er to
dis
play
the
chan
nel i
n us
e. T
hen,
to s
elec
t a c
hann
el h
ighe
r th
an th
e on
e in
use
, pre
ss th
e C
HAN
(up)
key
. Pre
ss a
nd re
leas
e th
e C
HAN
(up)
ke
y to
pro
ceed
to
the
next
(hi
gher
) pr
ogra
mm
ed c
hann
el.
Pre
ss a
nd h
old
dow
n th
e C
HAN
(up
) ke
y to
scr
oll u
pwar
d th
roug
h a
num
ber
of c
hann
els
rapi
dly.
Whe
n th
e de
sire
d ch
anne
l num
ber
is r
each
ed,
sim
ply
rele
ase
the
CH
AN (
up)
key
and
the
disp
lay
will
stop
on
the
new
cha
nnel
num
ber.
For e
xam
ple:
0FF
02
VH
F-90
M U
ser G
uide
page
14
Q-M
AC
Ele
ctro
nics
Pty
Ltd
This
dis
play
sho
ws
that
the
sele
cted
cha
nnel
is
Cha
nnel
02.
The
chan
nel d
ispl
ay w
ill ti
me
out a
fter
two
seco
nds,
and
the
oper
atin
g fre
quen
cy
(rec
eive
freq
uenc
y) w
ill b
e di
spla
yed.
To s
elec
t a c
hann
el lo
wer
than
the
one
in u
se, p
ress
the
CH
AN
(dow
n) k
ey in
the
sam
e m
anne
r as
men
tione
d ab
ove
for t
he C
HAN
(up)
key
.
Onc
e th
e ap
prop
riate
cha
nnel
has
bee
n se
lect
ed, c
omm
ence
com
mun
icat
ion.
To
trans
mit,
sim
ply
pres
s an
d ho
ld d
own
the
PTT
sw
itch
on th
e ha
ndse
t.
Whe
n P
TT is
pre
ssed
, the
dis
play
will
indi
cate
the
trans
mitt
er fr
eque
ncy.
3.2.
3.2
Cha
nnel
Con
figur
atio
n Th
e m
axim
um n
umbe
r of
cha
nnel
s th
at c
an b
e pr
ogra
mm
ed in
to th
e V
HF-
90M
is
ten.
Not
e th
at w
hen
scro
lling,
the
chan
nel n
umbe
rs w
ill ‘w
rap
arou
nd’ f
rom
hig
hest
to
low
est a
nd v
ice
vers
a. T
he c
hann
el fr
eque
ncie
s ca
n be
pro
gram
med
via
the
PC
in
terfa
ce o
r by
usi
ng a
DTM
F ha
ndse
t. Tr
ansm
it an
d re
ceiv
e fre
quen
cies
can
be
prog
ram
med
diff
eren
tly f
or h
alf
dupl
ex o
r th
e sa
me
for
norm
al n
et w
orki
ng.
The
VH
F-90
M a
lso
cont
ains
an
addi
tiona
l set
of t
en s
peci
al fr
eque
ncie
s th
at a
re u
sed
for t
he S
CA
N a
nd F
CS
mod
es th
at a
re th
e sa
me
for t
rans
mit
and
rece
ive.
3.2.
4 Se
lect
ing
a C
omm
unic
atio
n M
ode
See
als
o se
ctio
n 4.
2
3.2.
4.1
Lega
cy
In L
egac
y M
ode,
the
VH
F-90
M o
pera
tes
on t
he s
elec
ted
fixed
cha
nnel
usi
ng
anal
og F
M m
odul
atio
n an
d a
150H
z su
b-au
dibl
e sq
uelc
h to
ne.
This
allo
ws
com
mun
icat
ion
with
com
patib
le le
gacy
tran
scei
vers
(P
RC
-77,
Sta
nag
4204
). Th
is
mod
e is
in o
pera
tion
whe
n no
oth
er s
ecur
e m
ode
is s
elec
ted.
CH.02
VH
F-90
M U
ser G
uide
Q-M
AC
Ele
ctro
nics
Pty
Ltd
pa
ge47
7.
CO
NFI
GU
RA
TIO
NS
The
equi
pmen
t ch
osen
an
d th
e w
ay
in
whi
ch
it is
se
t up
w
ill
affe
ct
the
perfo
rman
ce o
f VH
F co
mm
unic
atio
ns. T
he c
hoic
e of
ant
enna
sys
tem
and
pow
er
supp
ly is
crit
ical
. Wha
t is
good
for o
ne s
yste
m is
not
nec
essa
rily
good
for a
noth
er.
The
way
in w
hich
the
syst
em is
inst
alle
d is
als
o ex
trem
ely
impo
rtant
.
7.1.
M
anpa
ck/M
anpo
rtab
le
A m
anpa
ck c
onsi
sts
of a
VH
F-90
M,
batte
ry p
ack,
ant
enna
and
rad
io m
ount
ing
hard
war
e.
VH
F-90
M U
ser G
uide
page
46
Q-M
AC
Ele
ctro
nics
Pty
Ltd
Spec
ifica
tions
100
~ 24
0V A
C in
put f
or A
C a
dapt
or
11 to
36
volts
inpu
t for
AC
or D
C s
uppl
y vo
ltage
s of
at l
east
30
wat
ts
NiM
h (2
400)
sta
ndar
d ch
arge
at
500m
A t
hen
final
top
up
at 2
40m
A a
nd h
old
trick
le a
t 50m
A.
VH
F-90
M U
ser G
uide
Q-M
AC
Ele
ctro
nics
Pty
Ltd
pa
ge15
3.2.
4.2
Encr
ypte
d Fi
xed
Freq
uenc
y Th
e E
ncry
pted
Fix
ed F
requ
ency
mod
e se
ts t
he V
HF-
90M
to
a di
gita
l, en
cryp
ted
trans
mis
sion
on
a fix
ed c
hann
el.
This
mod
e is
tog
gled
on
and
off
by b
riefly
pr
essi
ng th
e S
EC
but
ton.
3.2.
4.3
Free
Cha
nnel
Sea
rch
The
Free
Cha
nnel
Sea
rch
mod
e se
ts t
he V
HF-
90M
to
a di
gita
l, en
cryp
ted
trans
mis
sion
acr
oss
ten
pre-
prog
ram
med
cha
nnel
s. T
his
mod
e is
togg
led
on a
nd
off b
y br
iefly
pre
ssin
g th
e O
N/O
FF b
utto
n an
d th
e SE
C k
ey a
t the
sam
e tim
e.
3.2.
4.4
Freq
uenc
y H
oppi
ng
The
Freq
uenc
y H
oppi
ng
mod
e se
ts
the
VH
F-90
M
to
a di
gita
l, en
cryp
ted
trans
mis
sion
, hop
ping
acr
oss
256
frequ
enci
es o
ver a
6.4
MH
z ba
nd. T
his
mod
e is
to
ggle
d on
and
off
by b
riefly
pre
ssin
g th
e H
OP
but
ton.
3.3.
M
akin
g a
Cal
l
3.3.
1 H
ow to
Mak
e a
Voic
e C
all
Ther
e ar
e a
num
ber o
f rul
es th
at s
houl
d be
obs
erve
d w
hen
mak
ing
a vo
ice
call
on
a V
HF
radi
o:
S
elec
t an
appr
opria
te n
oise
free
cha
nnel
.
B
efor
e ca
lling
the
othe
r sta
tion,
list
en to
the
chan
nel t
o se
e if
it is
bus
y. If
the
chan
nel i
s bu
sy, w
ait u
ntil
com
mun
icat
ions
hav
e ce
ased
. If t
he c
hann
el is
free
, pr
ocee
d w
ith th
e ca
ll.
P
ress
and
hol
d do
wn
the
PTT
sw
itch
on th
e ha
ndse
t and
giv
e a
shor
t voi
ce
call
iden
tifyi
ng y
our o
wn
stat
ion
and
the
stat
ion
bein
g ca
lled.
E
xam
ple:
“Hel
lo tw
o, th
is is
one
. Hel
lo tw
o, th
is is
one
. How
do
you
read
me?
Ove
r.”
Y
ou s
houl
d en
d al
l co
mm
unic
atio
ns w
ith t
he w
ord
“OV
ER
”. Th
is i
ndic
ates
cl
early
to th
e ot
her
user
that
you
hav
e fin
ishe
d w
hat y
ou w
ish
to s
ay, s
o th
at
they
m
ay
spea
k.
This
is
ve
ry
impo
rtant
, pa
rticu
larly
w
hen
spea
king
to
so
meo
ne w
ho is
on
a te
leph
one
(via
a te
leph
one
inte
rcon
nect
uni
t). T
actic
al
radi
os a
re s
impl
ex, s
o it
is n
ot p
ossi
ble
to ta
lk a
nd li
sten
at t
he s
ame
time,
so
usin
g “O
VE
R” i
s es
sent
ial.
VH
F-90
M U
ser G
uide
page
16
Q-M
AC
Ele
ctro
nics
Pty
Ltd
E
nsur
e th
at y
our
mou
th is
alw
ays
clos
e to
the
mic
roph
one
(or m
outh
piec
e on
a
tele
phon
e ha
ndse
t) w
hen
spea
king
ove
r a V
HF
radi
o.
A
s a
gene
ral r
ule,
spe
ak m
ore
slow
ly a
nd c
lear
ly.
Inst
ruct
ions
for m
akin
g a
Sel
call
(Sel
ectiv
e C
all)
are
outli
ned
in s
ectio
n 5.
4 of
this
G
uide
.
3.3.
2 N
ATO
Pho
netic
Alp
habe
t W
hen
it is
nec
essa
ry to
spe
ll ou
t wor
ds o
ver t
he ra
dio,
use
the
follo
win
g w
ords
to
deno
te in
divi
dual
lette
rs. T
he R
adio
Alp
habe
t, lis
ted
belo
w, i
s us
ed in
all
coun
tries
as
an
Inte
rnat
iona
l Sta
ndar
d.
Lette
rW
ord
Lette
rW
ord
AA
lpha
NN
ovem
ber
BB
ravo
OO
scar
CC
harli
eP
Pap
a
DD
elta
uebe
c
EE
cho
RR
omeo
FFo
xtro
tS
Sie
rra
GG
olf
TTa
ngo
HH
otel
UU
nifo
rm
IIn
dia
VV
icto
r
JJu
liet
WW
hisk
y
KK
iloX
X-r
ay
LLi
ma
YY
anke
e
MM
ike
ZZu
lu
3.3.
3 To
Beg
in C
omm
unic
atio
n To
beg
in c
omm
unic
atio
ns (
i.e. t
o tra
nsm
it), s
impl
y pr
ess
and
hold
dow
n th
e P
TT
switc
h on
the
hand
set a
nd th
en s
peak
into
the
hand
set m
icro
phon
e in
acc
orda
nce
VH
F-90
M U
ser G
uide
Q-M
AC
Ele
ctro
nics
Pty
Ltd
pa
ge45
At t
he c
ompl
etio
n of
cha
rgin
g or
just
prio
r to
use
, tur
n of
f the
cha
rger
at t
he A
C
wal
l soc
ket a
nd d
isco
nnec
t fro
m th
e ba
ttery
.
If th
e A
C C
harg
er F
ails
to O
pera
te
C
heck
all
conn
ectio
ns a
nd t
hat
AC
/DC
pow
er i
s tu
rned
on
at t
he w
all
sock
et.
C
heck
that
the
pins
from
the
char
ger t
o th
e ba
ttery
are
cle
an a
nd fr
ee fr
om
obst
ruct
ions
.
E
nsur
e th
e in
dica
tors
are
alw
ays
Gre
en.
If
the
AC
/DC
Cha
rger
is f
itted
with
a c
onne
ctor
, ch
eck
that
it is
ful
ly a
nd
corr
ectly
inse
rted
into
the
sock
ets.
If
the
AC
/DC
Cha
rger
stil
l doe
s no
t ope
rate
, ret
urn
it to
the
supp
lier.
Cha
rger
Pro
tect
ion
The
AC
/DC
Cha
rger
has
the
follo
win
g pr
otec
tion:
O
ver c
urre
nt p
rote
ctio
n
O
ver a
nd u
nder
vol
tage
S
hort
circ
uit p
rote
ctio
n
Mou
ntin
g
Ens
ure
that
the
AC
Cha
rger
is in
stal
led
and
used
in a
moi
stur
e fre
e en
viro
nmen
t. C
are
shou
ld b
e ta
ken
that
the
AC
/DC
Cha
rger
has
ade
quat
e ve
ntila
tion.
Use
r Ser
vice
Info
rmat
ion
Ens
ure
the
AC
/DC
Cha
rger
lea
ds a
nd A
C p
ower
cor
d ar
e in
goo
d co
nditi
on.
Ens
ure
that
all
conn
ectio
ns a
re c
lean
and
free
from
cor
rosi
on.
The
unit
cont
ains
a th
erm
al fu
se, w
hich
will
auto
mat
ical
ly re
set w
hen
the
faul
t has
be
en re
mov
ed.
Not
e:
Ther
e ar
e no
use
r se
rvic
eabl
e pa
rts in
side
. Una
utho
rised
ope
ning
of t
he
AC
Cha
rger
will
voi
d th
e w
arra
nty.
If
the
AC
cor
d is
dam
aged
, re
plac
e w
ith a
n ap
prov
ed ty
pe o
f the
sam
e ra
ting.
Ser
vice
per
sonn
el s
houl
d en
sure
that
the
pow
er
sour
ce is
dis
conn
ecte
d fro
m th
e C
harg
er b
efor
e op
enin
g th
e ca
se.
VH
F-90
M U
ser G
uide
page
44
Q-M
AC
Ele
ctro
nics
Pty
Ltd
6.4.
1 A
C/D
C C
harg
er
The
AC/D
C C
harg
er m
ay b
e us
ed to
cha
rge
the
NiM
h ba
ttery
. It i
s im
porta
nt th
at
thes
e ba
tterie
s ar
e re
gula
rly a
nd fu
lly re
char
ged
and
are
not s
tore
d in
a p
artia
lly o
r fu
lly d
isch
arge
d st
ate.
The
Bat
tery
Cha
rger
is
not
inte
nded
for
use
as
pow
er
supp
lies
as th
e un
it in
corp
orat
es a
“flo
at a
nd b
oost
” circ
uit,
whi
ch w
ill st
ay in
boo
st
if a
load
as
wel
l as
the
batte
ry is
con
nect
ed to
the
char
ger,
poss
ibly
dam
agin
g th
e ba
tterie
s.
Prio
r to
conn
ectin
g th
e AC
/DC
Cha
rger
to th
e ba
ttery
, che
ck th
at th
e A
C C
harg
er
is p
lugg
ed in
to a
n A
C o
utpu
t with
an
appr
oved
IEC
320
AC
cor
d an
d th
e sw
itch
is
turn
ed o
ff or
the
cha
rger
is c
onne
cted
to
an a
ltern
ativ
e vo
ltage
sou
rce
that
can
su
pply
at l
east
30
wat
ts o
f pow
er u
nder
load
.
The
AC
/DC
cha
rger
is fi
tted
with
a p
olar
ised
con
nect
or fo
r th
e ba
ttery
pac
k. It
is
high
ly re
com
men
ded
that
the
batte
ry is
alig
ned
to th
e ca
se b
efor
e pu
shin
g in
to th
e ch
arge
r. Th
is e
nsur
es t
hat
the
batte
ry is
con
nect
ed w
ith t
he r
ight
pol
arity
eve
ry
time.
Mak
e su
re t
hat
the
batte
ry p
ack
is f
ully
ins
erte
d in
to t
he s
ocke
t an
d th
e re
tain
ing
clip
s ar
e ap
plie
d.
Afte
r co
rrec
tly c
onne
ctin
g th
e B
atte
ry C
harg
er t
o th
e A
C w
all
outle
t or
sui
tabl
e vo
ltage
sou
rce,
the
gre
en L
ED
will
illu
min
ate
and
flash
at
one-
seco
nd in
terv
als
indi
catin
g th
at th
e po
wer
is p
rese
nt a
nd th
e un
it is
ope
ratin
g.
If th
e ch
argi
ng p
roce
ss b
egin
s, t
he R
ED L
ED
s on
eith
er e
nd w
ill c
hang
e to
fas
t fla
shin
g gr
een,
indi
catin
g th
at th
e ba
ttery
is c
harg
ing.
The
end
indi
cato
r LE
Ds
will
flash
at a
n ev
en fa
ster
rate
whe
n th
e ba
ttery
has
pas
sed
its fi
rst c
harg
e po
int a
nd
ente
rs t
he f
inal
top
off
mod
e. A
fter
this
mod
e, t
he G
reen
LED
s w
ill re
vert
to
flash
ing
at o
ne-s
econ
d in
terv
als
to in
dica
te th
e ba
ttery
has
bee
n fu
lly c
harg
ed.
It is
reco
mm
ende
d th
at th
e ch
arge
r be
left
conn
ecte
d to
the
batte
ry a
nd tu
rned
on
at a
ll tim
es w
hen
the
batte
ry is
not
in u
se, a
s ov
erch
argi
ng is
not
pos
sibl
e.
VH
F-90
M U
ser G
uide
Q-M
AC
Ele
ctro
nics
Pty
Ltd
pa
ge17
with
radi
o pr
otoc
ol. I
f the
VH
F-90
M h
as d
iffer
ent t
rans
mit
and
rece
ive
frequ
enci
es,
then
the
diffe
rent
tran
smit
frequ
ency
will
be
disp
laye
d du
ring
the
trans
mit
phas
e.
3.3.
4 Vi
ewin
g th
e Tr
ansm
it Fr
eque
ncy
To v
iew
the
tra
nsm
it fre
quen
cy,
sim
ply
pres
s th
e P
TT s
witc
h lo
cate
d on
the
ha
ndse
t. Th
e di
spla
y w
ill s
how
the
frequ
ency
in M
Hz.
As
the
chan
nel s
paci
ng o
f th
e V
HF-
90M
is
25kH
z, t
he l
ast
two
digi
ts w
ill be
eith
er 0
0, 2
5, 5
0 or
75.
For
ex
ampl
e:
This
dis
play
sho
ws
a tra
nsm
it fre
quen
cy o
f 67
.125
MH
z.
Whe
n th
e P
TT s
witc
h is
rel
ease
d th
e ch
anne
l num
ber
will
als
o br
iefly
dis
play
on
the
scre
en.
3.4.
Er
ase
Func
tion
The
VH
F-90
M in
corp
orat
es a
dire
ct E
rase
Fun
ctio
n, w
hich
allo
ws
the
oper
ator
to
quic
kly
and
easi
ly e
rase
the
mem
ory
and
/ or
the
DSP
mem
ory
of th
e V
HF-
90M
. Th
is fe
atur
e m
ay b
e us
ed if
the
VH
F-90
M is
requ
ired
to b
e re
prog
ram
med
or r
eset
in
the
fie
ld (
refe
r to
the
App
endi
x at
the
bac
k of
thi
s G
uide
), or
if t
he c
hann
el /
fre
quen
cy
info
rmat
ion
need
s to
be
er
ased
, or
in
ci
rcum
stan
ces
whe
re
the
VH
F-90
M is
abo
ut to
fall
into
ene
my
hand
s.
The
PC p
rogr
amm
ing
softw
are
can
be u
sed
to s
et o
r inh
ibit
the
eras
e fu
nctio
nalit
y.
The
two
optio
ns a
re:
1.Er
ase
All.
Thi
s w
ill er
ase
the
entir
e D
SP
fla
sh m
emor
y an
d re
nder
the
ra
dio
inop
erab
le. R
etur
n to
fact
ory
will
then
be
requ
ired
for o
pera
tion.
67.125
VH
F-90
M U
ser G
uide
page
18
Q-M
AC
Ele
ctro
nics
Pty
Ltd
2.Er
ase
Setti
ngs.
Thi
s op
tion
will
just
res
et t
he r
adio
to
fact
ory
defa
ults
er
asin
g th
e D
ES
hop
cod
e an
d ch
anne
l in
form
atio
n. T
he r
adio
will
stil
l fu
nctio
n w
hen
set u
p w
ith th
e co
rrect
set
tings
.
To e
rase
the
mem
ory
of th
e V
HF-
90M
, sim
ply
hold
dow
n th
e O
FF k
ey, a
nd p
ress
an
d ho
ld th
e S
EC
(S
ecur
e) k
ey. W
hen
the
coun
ter
times
out
to z
ero
the
disp
lay
will
appe
ar a
s fo
llow
s: Th
is fl
ashi
ng d
ispl
ay s
how
s th
at th
e E
rase
Fun
ctio
n is
abo
ut to
com
men
ce.
If an
y ke
y is
pre
ssed
whi
le th
e di
spla
y is
flas
hing
, the
n th
e er
ase
func
tion
will
be
canc
elle
d.
Oth
erw
ise,
th
e di
spla
y w
ill in
crea
se
the
flash
ra
te
and
afte
r ap
prox
imat
ely
ten
seco
nds,
the
mem
ory
will
have
bee
n er
ased
. Th
e di
spla
y w
ill
then
sho
w a
ser
ies
of li
nes
to c
onfir
m th
e er
ase
func
tion.
The
VH
F-90
M w
ill th
en
rese
t to
the
OFF
con
ditio
n.
Spec
ial N
ote:
Th
is fu
nctio
n w
ill e
rase
all
chan
nels
in m
emor
y an
d se
t to
defa
ult v
alue
s. H
owev
er if
th
eER
ASE
ALL
func
tion
is s
elec
ted
from
the
PC
Men
u fo
r en
emy
capt
ure
then
the
entir
e op
erat
ing
syst
em o
f th
e D
SP
will
als
o be
era
sed
and
the
VH
F-90
M w
ill n
ot
func
tion
agai
n. T
he V
HF-
90M
can
onl
y be
rend
ered
ser
vica
ble
agai
n by
retu
rnin
g th
e de
vice
to Q
-MA
C E
lect
roni
cs.
ErASE
VH
F-90
M U
ser G
uide
Q-M
AC
Ele
ctro
nics
Pty
Ltd
pa
ge43
6.2.
2 Sh
ut D
own
Sequ
ence
Th
e S
hut-D
own
Seq
uenc
e fo
r the
VD
S-9
0M is
as
follo
ws:
Pre
ss th
e ro
tary
kno
b fo
r tw
o se
cond
s to
sw
itch
the
VH
F-90
M o
ff.
The
disp
lay
will
indi
cate
:
O
ff 1
O
ff 0
The
VH
F-90
M w
ill th
en s
witc
h its
elf O
FF a
nd a
ll ac
cess
orie
s co
nnec
ted
to it
suc
h as
han
dset
s, V
DS
-90M
(Doc
king
Sta
tion)
, and
VH
F-50
M (B
oost
er A
mpl
ifier
).
6.2.
3 Se
tting
the
VDS-
90M
into
By-
Pass
Mod
e H
old
dow
n th
e S
hift
key
whi
le m
omen
taril
y pr
essi
ng th
e P
TT k
ey o
n th
e H
ands
et,
to to
ggle
the
setti
ng.
6.3.
B
oost
er A
mpl
ifier
Th
e VH
F-50
M B
oost
er A
mpl
ifier
is u
sed
as a
n ac
cess
ory
to b
oost
the
VH
F-90
M
outp
ut o
btai
ned
thro
ugh
the
VD
S-9
0M V
ehic
le D
ocki
ng S
tatio
n to
50
wat
ts.
It ca
n al
so b
e sw
itche
d to
Byp
ass
mod
e vi
a an
y H
ands
et p
lugg
ed in
to th
e sy
stem
, en
ablin
g th
e V
HF-
90M
to tr
ansm
it di
rect
ly to
the
ante
nna
at w
hate
ver p
ower
leve
l it
is s
et to
.
6.4.
B
atte
ry C
harg
er
Q-M
AC o
ffers
a v
arie
ty o
f ba
ttery
cha
rger
opt
ions
, so
tha
t ba
tterie
s m
ay b
e ch
arge
d fro
m a
sol
ar s
ourc
e, m
ains
pow
er te
rmin
al o
r veh
icle
bat
tery
. The
Bat
tery
C
harg
er h
as b
een
desi
gned
to
auto
mat
ical
ly c
harg
e a
varie
ty o
f Q
MA
C t
ype
batte
ries.
The
Bat
tery
Cha
rger
will
aut
omat
ical
ly d
etec
t th
e ba
ttery
typ
e up
on
conn
ectio
n to
the
char
ger a
nd c
harg
e th
e ba
ttery
to th
e co
rrec
t lev
els.
The
Bat
tery
C
harg
er h
as b
een
desi
gned
to a
ccep
t a w
ide
varie
ty o
f inp
ut v
olta
ges
so th
at ju
st
abou
t an
y vo
ltage
sou
rce
can
be u
sed
to c
harg
e th
e ba
ttery
pac
k. T
he B
atte
ry
Cha
rger
will
acce
pt e
ither
AC
or D
C in
put v
olta
ges
in th
e ra
nge
of 1
1 to
36
volts
.
VH
F-90
M U
ser G
uide
page
42
Q-M
AC
Ele
ctro
nics
Pty
Ltd
6.2.
D
ocki
ng S
tatio
n Th
e V
DS
-90M
Doc
king
Sta
tion
allo
ws
a V
HF-
90M
to b
e in
stal
led
into
a v
ehic
le o
r ba
se
stat
ion
appl
icat
ion.
It
is
an
inte
llige
nt
inte
rface
th
at
reco
gnis
es
the
conf
igur
atio
n of
the
VH
F-90
M, r
erou
ting
the
RF
sign
al fr
om th
e an
tenn
a co
nnec
tor
on t
he f
ront
pan
el o
f th
e V
HF-
90M
to
the
RF
OU
T co
nnec
tor
on t
he r
ear
of t
he
VD
S-9
0M.
6.2.
1 St
art U
p Se
quen
ce
Pre
ss th
e ro
tary
kno
b fo
r one
sec
ond
to s
witc
h th
e V
HF-
90M
on.
VH
F-90
MD
ispl
ay
Rea
ding
Aud
io
Not
es
Lb-9
0 N
one
Indi
cate
s V
HF-
90M
is in
Low
Ban
d
v 1.
0006
N
one
Indi
cate
s V
HF-
90M
Firm
war
e R
evis
ion
SE
LcL
Non
e In
dica
tes
it is
ent
erin
g S
elca
ll m
ode
- - -
1234
N
one
Indi
cate
s th
e al
loca
ted
Sel
call
ID
PnP
O
ne b
eep
Indi
cate
s V
HF-
90M
is in
Plu
g an
d P
lay
mod
e
4700
03
3 x
beep
In
dica
tes
VHF-
90M
ha
s re
cogn
ised
th
e ac
cess
ory
type
VD
S-9
0M
4700
04
3 x
beep
In
dica
tes
VHF-
90M
ha
s re
cogn
ised
th
e ac
cess
ory
type
Boo
ster
Am
plifi
er V
HF-
50M
VH
F-50
M g
reen
pow
er L
ED w
ill no
w s
tay
on
30.2
00
Rx
audi
o R
eset
s to
the
last
fre
quen
cy t
he V
HF-
90M
was
le
ft in
bef
ore
pow
er d
own
VH
F-90
M U
ser G
uide
Q-M
AC
Ele
ctro
nics
Pty
Ltd
pa
ge19
4.
MO
DES
OF
CO
MM
UN
ICA
TIO
NS
4.1.
Le
gacy
Mod
e
4.1.
1 B
asic
Des
crip
tion
The
VH
F-90
M c
an o
pera
te in
full
lega
cy m
ode
and
inte
rope
rate
with
the
PRC
-77
and
its
equi
vale
nts.
In
le
gacy
m
ode,
th
e V
HF-
90M
ca
n se
nd
and
rece
ive
com
mun
icat
ions
with
150
Hz
tone
cod
ed s
quel
ch s
yste
ms.
4.1.
2 15
0Hz
Sque
lch
Syst
em (C
TCSS
) Th
e V
HF-
90M
leg
acy
mod
e op
erat
ions
are
des
igne
d to
be
com
patib
le w
ith
exis
ting
VH
F un
its s
uch
as th
e P
RC
77. T
he V
HF-
90M
cha
nnel
spa
cing
of 2
5kH
z,
and
150H
z to
ne s
quel
ch s
yste
m,
is i
mpl
emen
ted
on t
he 1
0 pr
ogra
mm
able
ch
anne
ls. T
he fu
ll po
wer
out
put o
f 5 w
atts
and
abi
lity
to u
se b
oth
larg
e an
d sm
all
size
PR
C-7
7 co
mpa
tible
ant
enna
s en
sure
s th
e sy
stem
can
be
used
sea
mle
ssly
w
ith o
lder
uni
ts in
the
field
. Com
patib
ility
with
han
dset
s he
adge
ar a
nd o
ther
aud
io
acce
ssor
ies
is a
lso
mai
ntai
ned.
The
150H
z to
ne c
oded
squ
elch
sys
tem
is u
sed
to o
pen
or u
n-m
ute
the
radi
o au
dio
whe
n a
sign
al t
hat
cont
ains
a s
ubca
rrie
r of
150
Hz
is r
ecei
ved.
The
ope
ratio
n is
su
ch th
at a
con
vent
iona
l squ
elch
con
trol i
s no
t nee
ded.
The
radi
o al
so p
erfo
rms
a hi
gh p
ass
sign
al fu
nctio
n on
the
rece
ived
aud
io s
o th
at th
e 15
0Hz
is n
ot h
eard
in
the
head
set
or
spea
ker.
This
fa
cilit
y pr
even
ts
the
sque
lch
open
ing
on
unm
odul
ated
car
riers
. The
VH
F-90
M w
ill tra
nsm
it a
150H
z su
b-ca
rrie
r to
ne w
hen
enab
led
on e
very
lega
cy m
ode
trans
mis
sion
. The
150
Hz
sque
lch
syst
em c
an b
e en
able
d or
dis
able
d us
ing
the
PC
pro
gram
min
g so
ftwar
e.
4.1.
3 St
anda
rd S
quel
ch S
yste
m
Whe
n th
e V
HF-
90M
is n
ot o
pera
ting
with
the
150H
z sq
uelc
h sy
stem
then
the
radi
o ha
s an
adv
ance
d au
to s
quel
ch s
yste
m t
hat
oper
ates
on
the
rece
ived
sig
nal
stre
ngth
. Whe
n en
able
d th
is s
yste
m w
ill un
-mut
e th
e ra
dio
and
open
the
rece
ived
si
gnal
pat
h w
hen
a si
gnal
that
is a
ppro
xim
atel
y 3d
B s
trong
er th
an th
e ba
ckgr
ound
no
ise
is r
ecei
ved.
The
rad
io w
ill pe
rform
a lo
ng ti
me
aver
age
on th
e ba
ckgr
ound
no
ise
and
use
this
as
the
refe
renc
e sw
itchi
ng p
oint
. If
cont
inuo
us s
trong
sig
nals
ar
e re
ceiv
ed, t
hen
the
back
grou
nd n
oise
ref
eren
ce p
oint
will
mov
e an
d th
e si
gnal
re
quire
d to
ope
n th
e sq
uelc
h w
ill n
eed
to b
e gr
eate
r tha
n th
e av
erag
e no
ise.
Thi
s fe
atur
e is
ena
bled
usi
ng t
he P
C s
oftw
are.
Alte
rnat
ivel
y, t
he r
adio
can
als
o be
VH
F-90
M U
ser G
uide
page
20
Q-M
AC
Ele
ctro
nics
Pty
Ltd
prog
ram
med
via
the
PC
sof
twar
e to
hav
e th
e sq
uelc
h co
ntin
uous
ly o
pen.
Thi
s al
low
s an
y ot
her a
ctiv
ity o
n th
e ch
anne
l to
be m
onito
red.
4.2.
Se
cure
Mod
es
4.2.
1 O
verv
iew
of S
ecur
e M
odes
Th
e V
HF-
90M
will
ope
rate
in
eith
er H
oppi
ng (
Freq
uenc
y H
oppi
ng)
or S
ecur
e (S
ecur
e, f
ixed
fre
quen
cy)
mod
e or
sta
ndar
d le
gacy
(fix
ed f
requ
ency
) m
ode.
H
oppi
ng a
nd s
ecur
e us
e di
gita
l mod
ulat
ion,
and
sta
ndar
d m
ode
uses
ana
log
FM
mod
ulat
ion.
4.2.
1.1
Sele
ctin
g th
e C
orre
ct M
ode
(Cha
ngin
g th
e co
mm
unic
atio
n op
erat
ing
mod
e)
To c
hang
e th
e op
erat
ing
mod
e fo
r a p
artic
ular
cha
nnel
, firs
t sel
ect t
he a
ppro
pria
te
chan
nel,
and
then
pre
ss H
OP
Key
. The
cur
rent
mod
e w
ill th
en b
e di
spla
yed.
To
chan
ge t
he m
ode,
pre
ss a
nd r
elea
se th
e ke
y ag
ain.
The
new
mod
e w
ill n
ow b
e se
lect
ed a
nd th
e di
spla
y w
ill sh
ow th
is c
hang
e. F
or e
xam
ple:
This
dis
play
sho
ws
that
Hop
ping
mod
e is
sel
ecte
d an
d en
able
.
OR
...
HP 0
n
VH
F-90
M U
ser G
uide
Q-M
AC
Ele
ctro
nics
Pty
Ltd
pa
ge41
6.
VHF-
90M
AC
CES
SOR
IES
6.1.
B
atte
ries
Use
the
VH
F-90
M in
con
junc
tion
with
a Q
-MAC
rec
harg
eabl
e ba
ttery
pac
k. F
or
any
othe
r ty
pe o
f bat
tery
pac
k, c
onta
ct th
e Q
-MA
C r
epre
sent
ativ
e to
ens
ure
that
th
e ba
ttery
cho
sen
is s
uita
ble.
The
VH
F-90
M m
ust
be p
rope
rly c
onne
cted
to
a su
itabl
y ch
arge
d ba
ttery
. If
the
VH
F-90
M d
oes
not
rece
ive
adeq
uate
vol
tage
, it
will
not
oper
ate
prop
erly
. A
s a
war
ning
tha
t th
e ba
ttery
pac
k m
ay b
e ge
tting
low
, th
e di
spla
y w
ill sh
ow t
he
follo
win
g m
essa
ge.
This
dis
play
sho
ws
that
the
batte
ries
are
getti
ng lo
w.
The
batte
ry w
hich
may
be
used
with
the
VH
F-90
M R
adio
is a
sea
led
rech
arge
able
N
iMh
(SR
NiM
h) b
atte
ry.
The
abov
e ill
ustra
tion
show
s th
e ba
ttery
that
can
be
used
with
a V
HF-
90M
. The
bat
tery
cel
ls a
re
pack
aged
in a
toug
h w
ater
pro
of p
last
ic c
ase
with
clip
s to
atta
ch th
e ra
dio
asse
mbl
y. A
lso
pict
ured
is
the
VH
F-90
M c
harg
e co
ntro
ller &
AC
mai
ns s
uppl
y.
LO b
At
VH
F-90
M U
ser G
uide
page
40
Q-M
AC
Ele
ctro
nics
Pty
Ltd
the
men
u to
the
stan
dard
cyc
ling
men
u if
pres
sed
for m
ore
than
the
num
ber o
f key
co
rrec
tions
nee
ded.
Not
e: S
epar
ate
code
s ar
e us
ed fo
r th
e se
cure
mod
e “ Cod
ES”
and
hopp
ing
mod
e “ Cod
EH”,
thes
e m
ust b
e en
tere
d to
fully
pro
gram
the
unit.
VH
F-90
M U
ser G
uide
Q-M
AC
Ele
ctro
nics
Pty
Ltd
pa
ge21
This
dis
play
sho
ws
that
Sec
ure
Mod
e is
sel
ecte
d an
d en
able
d.
Sub
sequ
ent p
ress
es o
f the
HO
P k
ey o
r SE
C (S
ecur
e) k
ey a
llow
mov
ing
back
and
fo
rth b
etw
een
Hop
ping
, Leg
acy
and
Sec
ure
mod
es. W
hen
the
unit
is a
sla
ve, t
he
last
dig
it of
the
frequ
ency
dis
play
will
indi
cate
a lo
wer
cas
e “ h
” an
d w
hen
the
unit
is a
mas
ter
this
will
be
uppe
r ca
se “H”
. S
ecur
e m
ode
is in
dica
ted
by a
dec
imal
po
int o
n th
e la
st d
igit
of th
e di
spla
y.
This
dis
play
sho
ws
that
sla
ve h
oppi
ng m
ode
and
secu
re m
ode
is s
elec
ted
and
the
frequ
ency
is
32.0
25M
Hz.
Onc
e th
e op
erat
ing
mod
e ha
s be
en c
hang
ed fo
r a
parti
cula
r ch
anne
l, th
e se
tting
w
ill r
emai
n in
pla
ce u
ntil
anot
her
chan
nel
is s
elec
ted
or u
ntil
the
VH
F-90
M i
s sw
itche
d of
f. Th
e se
lect
ed m
ode
will
be e
nabl
ed a
ppro
xim
atel
y fiv
e se
cond
s af
ter
the
mod
e is
sel
ecte
d. T
his
stop
s th
e m
odes
bei
ng c
hang
ed i
nadv
erte
ntly
and
ca
usin
g in
corr
ect
mod
e ch
ange
s. T
he la
st d
igit
on th
e fre
quen
cy d
ispl
ay w
ill n
ot
be v
isib
le d
ue t
o th
e ov
erw
ritin
g of
the
hop
ping
ind
icat
or.
How
ever
, if
the
penu
ltim
ate
digi
t is
a 0
or 5
, the
last
dig
it m
ust b
e 0,
or i
f the
pen
ultim
ate
digi
t is
2 or
7 th
e la
st d
igit
will
be 5
. Thu
s, it
is re
dund
ant.
32.02h
SE 0
n
VH
F-90
M U
ser G
uide
page
22
Q-M
AC
Ele
ctro
nics
Pty
Ltd
4.2.
1.2
Key
Cod
e an
d K
ey M
anag
emen
t (S
ecur
e C
ode
Entr
y)
It is
adv
isab
le to
cha
nge
the
Key
Cod
e (fo
r th
e en
tire
radi
o ne
twor
k) o
n a
regu
lar
basi
s. I
n pe
acet
ime,
it is
typ
ical
to
chan
ge t
he K
ey C
ode
once
eve
ry m
onth
(or
so
met
imes
eve
n le
ss f
requ
ently
). H
owev
er,
in w
artim
e it
may
be
nece
ssar
y to
ch
ange
the
code
onc
e ev
ery
wee
k. T
he fr
eque
ncy
with
whi
ch th
e co
de s
houl
d be
ch
ange
d de
pend
s en
tirel
y on
the
situ
atio
n.
4.2.
2 En
cryp
ted
Fixe
d Fr
eque
ncy
The
Enc
rypt
ed F
ixed
Fre
quen
cy m
ode
sets
the
VH
F-90
M t
o a
digi
tal,
encr
ypte
d tra
nsm
issi
on o
n a
fixed
cha
nnel
. The
Key
Cod
e pr
ogra
mm
ed in
the
VH
F-90
M is
us
ed to
enc
rypt
and
dec
rypt
the
digi
tal s
igna
l. Th
e V
HF-
90M
will
only
be
able
to
com
mun
icat
e w
ith a
noth
er V
HF-
90M
that
is o
pera
ting
on th
e sa
me
fixed
cha
nnel
an
d pr
ogra
mm
ed w
ith t
he s
ame
Key
Cod
e. T
his
mod
e is
tog
gled
on
and
off
by
brie
fly p
ress
ing
the
SE
C b
utto
n.
4.2.
3 Fr
ee C
hann
el S
earc
h (F
CS)
Th
e Fr
ee C
hann
el S
earc
h m
ode
will
also
sca
n al
l th
e sp
ecia
l pr
ogra
mm
ed
chan
nels
in
orde
r to
det
erm
ine
the
low
est
RS
SI
with
in t
he c
hann
els.
The
FC
S
mod
e w
ill bu
ild a
dyn
amic
tab
le o
f al
l the
se c
hann
el’s
RS
SI
valu
es.
It w
ill al
so
scan
for t
he u
niqu
e pr
esen
ce o
f a c
ompa
tible
VH
F-90
M tr
ansm
ittin
g on
one
of t
he
scan
ned
chan
nels
. If a
tran
smitt
er ID
is fo
und,
the
unit
will
deco
de th
e in
form
atio
n on
that
cha
nnel
and
rem
ain
on th
e ch
anne
l for
the
chan
nel t
imeo
ut ti
me.
The
func
tion
can
be tu
rned
off
and
on b
y br
iefly
pre
ssin
g th
e O
N/O
FF b
utto
n an
d th
eSE
Cke
y at
the
sam
e tim
e. T
his
key
sequ
ence
will
togg
le th
e fu
nctio
n on
and
of
f.
Whe
n a
VH
F-90
M w
ants
to tr
ansm
it, th
e un
it w
ill tra
nsm
it on
one
of t
he fo
ur lo
wes
t (c
lear
est)
RSS
I cha
nnel
s. T
he c
hann
el th
at is
pic
ked
will
be
a ra
ndom
cho
ice
of
thes
e ch
anne
ls f
rom
the
dyn
amic
RS
SI
tabl
e. A
fter
the
trans
mis
sion
, it
will
then
re
mai
n on
the
cha
nnel
fol
low
ing
the
rele
ase
of t
he P
TT f
or t
he c
hann
el t
imeo
ut
time,
and
then
resu
me
scan
ning
aga
in.
VH
F-90
M U
ser G
uide
Q-M
AC
Ele
ctro
nics
Pty
Ltd
pa
ge39
Tra
nsm
it Fr
eque
ncy
Firs
t cyc
le th
roug
h th
e di
spla
y co
des
until
the
“CH
t”
dis
play
is re
ache
d an
d th
en
pres
s th
e ha
sh #
key
. A
bla
nk s
cree
n w
ill be
dis
play
ed.
Use
the
key
s on
the
D
TMF
keyb
oard
to
ente
r th
e ne
w f
requ
ency
. Th
e co
mpl
ete
frequ
ency
mus
t be
en
tere
d. I
f a
valu
e is
ent
ered
out
of
rang
e, t
he d
ispl
ay w
ill d
efau
lt to
the
low
est
valid
num
ber.
Whe
n fin
ishe
d, u
se th
e ha
sh #
key
to s
ave
and
exit
this
mod
e. If
a
mis
take
is m
ade
durin
g en
try, u
se th
e st
ar *
key
to e
rase
eac
h ch
arac
ter a
nd s
tart
agai
n. T
he e
rase
key
will
also
rev
erse
out
of
the
men
u to
the
sta
ndar
d cy
clin
g m
enu
if pr
esse
d fo
r m
ore
than
the
num
ber
of k
ey c
orre
ctio
ns n
eede
d. T
he
chan
nel f
requ
ency
that
is b
eing
set
is th
e on
e th
at h
as b
een
prog
ram
med
by
the
chan
nel
com
man
d ab
ove.
You
mus
t re
prog
ram
the
def
ault
chan
nel
if m
ore
chan
nel f
requ
enci
es a
re to
be
prog
ram
med
.
Pow
er S
ettin
g Fi
rst c
ycle
thro
ugh
the
disp
lay
code
s un
til th
e “P----
” dis
play
is re
ache
d an
d th
en
pres
s th
e ha
sh #
key
. A b
lank
scr
een
will
be
disp
laye
d. U
se th
e nu
mer
ic k
eys
on
the
DTM
F ke
yboa
rd to
set
the
requ
ired
pow
er le
vel.
Whe
n fin
ishe
d us
e th
e ha
sh #
key
to s
ave
and
exit
this
mod
e. T
he p
ower
leve
ls w
ill c
ycle
from
50
to 5
000m
W a
s ke
ys a
re p
ress
ed o
n th
e ke
yboa
rd.
The
eras
e ke
y w
ill al
so r
ever
se o
ut o
f th
e m
enu
to t
he s
tand
ard
cycl
ing
men
u if
pres
sed
for
mor
e th
an t
he n
umbe
r of
key
co
rrec
tions
nee
ded.
Whe
n th
e fin
al h
ash #
is p
ress
ed, t
he d
ispl
ay w
ill br
iefly
dis
play
the
wor
d “ SAV
E” to
in
dica
te th
at th
e in
form
atio
n is
bei
ng s
aved
into
mem
ory.
Pow
er le
vels
are
:
1 =
50m
W
2 =
500m
W o
r 0.5
wat
ts
3 =
5000
mW
or 5
wat
ts
DES
Key
Cod
e Fi
rst
cycl
e th
roug
h th
e di
spla
y co
des
until
the
“Co
dES”
or
“Cod
EH”
disp
lay
is
reac
hed,
and
then
pre
ss th
e ha
sh #
key
. A b
lank
scr
een
will
be
disp
laye
d. U
se th
e ke
ys o
n th
e D
TMF
keyb
oard
to
ente
r th
e ne
w 1
2-di
git
DE
S c
ode.
The
com
plet
e co
de m
ust b
e en
tere
d. T
he c
ode
will
cycl
e fro
m le
ft to
righ
t as
it is
ent
ered
. Dig
its
that
fall
outs
ide
the
5-di
git d
ispl
ay w
ill no
t be
visi
ble.
Whe
n fin
ishe
d, u
se th
e ha
sh
# k
ey to
sav
e an
d ex
it th
is m
ode.
If a
mis
take
is m
ade
durin
g en
try, u
se th
e st
ar *
key
to e
rase
eac
h ch
arac
ter a
nd s
tart
agai
n. T
he e
rase
key
will
also
reve
rse
out o
f
VH
F-90
M U
ser G
uide
page
38
Q-M
AC
Ele
ctro
nics
Pty
Ltd
Selc
all I
D
Firs
t cyc
le th
roug
h th
e di
spla
y co
des
until
the
“SEL
CL” d
ispl
ay is
reac
hed
and
then
pr
ess
the
hash
# k
ey.
A b
lank
scr
een
will
be d
ispl
ayed
. U
se t
he k
eys
on t
he
DTM
F ke
yboa
rd t
o en
ter
the
new
ID
and
whe
n fin
ishe
d, u
se t
he h
ash #
key
to
save
and
exi
t thi
s m
ode.
If a
mis
take
is m
ade
durin
g en
try, u
se th
e st
ar *
key
to
eras
e ea
ch c
hara
cter
and
sta
rt ag
ain.
The
era
se k
ey w
ill a
lso
reve
rse
out o
f the
m
enu
to t
he s
tand
ard
cycl
ing
men
u if
pres
sed
for
mor
e th
an t
he n
umbe
r of
key
co
rrec
tions
nee
ded.
Whe
n th
e fin
al h
ash #
is p
ress
ed, t
he d
ispl
ay w
ill br
iefly
dis
play
the
wor
d “ SAV
E” to
in
dica
te th
at th
e in
form
atio
n is
bei
ng s
aved
into
mem
ory.
Pre-
Prog
ram
med
Cha
nnel
s
Cha
nnel
Num
ber
Sele
ctio
n Fi
rst c
ycle
thro
ugh
the
disp
lay
code
s un
til th
e “CH
no” d
ispl
ay is
reac
hed
and
then
pr
ess
the
hash
# k
ey.
A b
lank
scr
een
will
be d
ispl
ayed
. U
se t
he k
eys
on t
he
DTM
F ke
yboa
rd t
o en
ter
the
new
ID
and
whe
n fin
ishe
d, u
se t
he h
ash #
key
to
save
and
exi
t thi
s m
ode.
The
era
se k
ey w
ill a
lso
reve
rse
out o
f the
men
u to
the
stan
dard
cyc
ling
men
u if
pres
sed
for
mor
e th
an t
he n
umbe
r of
key
cor
rect
ions
ne
eded
.
Whe
n th
e fin
al h
ash #
is p
ress
ed, t
he d
ispl
ay w
ill br
iefly
dis
play
the
wor
d “ SAV
E” to
in
dica
te th
at th
e in
form
atio
n is
bei
ng s
aved
into
mem
ory.
Rec
eive
Fre
quen
cy
Firs
t cyc
le th
roug
h th
e di
spla
y co
des
until
the
“CH
r”
dis
play
is re
ache
d an
d th
en
pres
s th
e ha
sh #
key
. A
bla
nk s
cree
n w
ill be
dis
play
ed.
Use
the
key
s on
the
D
TMF
keyb
oard
to
ente
r th
e ne
w f
requ
ency
. Th
e co
mpl
ete
frequ
ency
mus
t be
en
tere
d. I
f a
valu
e is
ent
ered
out
of
rang
e, t
he d
ispl
ay w
ill d
efau
lt to
the
low
est
valid
num
ber.
Whe
n fin
ishe
d, u
se th
e ha
sh #
key
to s
ave
and
exit
this
mod
e. If
a
mis
take
is m
ade
durin
g en
try, u
se th
e st
ar *
key
to e
rase
eac
h ch
arac
ter a
nd s
tart
agai
n. T
he e
rase
key
will
also
rev
erse
out
of
the
men
u to
the
sta
ndar
d cy
clin
g m
enu
if pr
esse
d fo
r m
ore
than
the
num
ber
of k
ey c
orre
ctio
ns n
eede
d. T
he
chan
nel f
requ
ency
that
is b
eing
set
is th
e on
e th
at h
as b
een
prog
ram
med
by
the
chan
nel
com
man
d ab
ove.
You
mus
t re
prog
ram
the
def
ault
chan
nel
if m
ore
chan
nel f
requ
enci
es a
re to
be
prog
ram
med
.
VH
F-90
M U
ser G
uide
Q-M
AC
Ele
ctro
nics
Pty
Ltd
pa
ge23
4.2.
4 Fr
eque
ncy
Hop
ping
4.2.
4.1
How
Doe
s H
oppi
ng W
ork
The
VH
F-90
M, f
itted
with
the
frequ
ency
hop
ping
opt
ion,
is c
apab
le o
f cha
ngin
g its
op
erat
ing
frequ
ency
ove
r a g
iven
ban
dwid
th 1
00 ti
mes
a s
econ
d. T
he fr
eque
ncy
of
the
trans
mitt
er i
s co
ntro
lled
by a
pse
udo-
rand
om s
eque
nce
gene
rato
r, w
hich
in
corp
orat
es a
uni
que
hopp
ing
code
sel
ecte
d by
the
ope
rato
r. A
t th
e re
ceiv
er
radi
o, a
n id
entic
al s
eque
nce
gene
rato
r, pr
ogra
mm
ed w
ith th
e sa
me
hopp
ing
code
, ca
uses
th
e re
ceiv
er
to
hop
in
the
sam
e se
quen
ce
as
the
trans
mitt
er.
Syn
chro
nisa
tion
data
is p
erio
dica
lly tr
ansm
itted
, dec
oded
, and
com
bine
d w
ith th
e un
ique
hop
ping
cod
e to
ens
ure
that
the
trans
mitt
er a
nd r
ecei
ver
keep
hop
ping
in
sync
hron
ism
, th
ereb
y m
aint
aini
ng i
ntel
ligib
le c
omm
unic
atio
n re
gard
less
of
any
pote
ntia
l el
ectro
nic
atta
ck.
The
hopp
ing
sequ
ence
fol
low
s a
pseu
do-r
ando
m
patte
rn w
ith a
n ex
trem
ely
long
rep
eat
time.
Thi
s re
nder
s th
e ho
ppin
g ne
twor
k hi
ghly
res
ista
nt t
o in
terc
eptio
n or
jam
min
g. O
nly
the
netw
ork
user
s w
ho h
ave
prog
ram
med
th
eir
radi
os
with
th
e sa
me
frequ
ency
an
d ho
ppin
g co
de
can
com
mun
icat
e. I
n a
frequ
ency
hop
ping
net
wor
k on
e st
atio
n is
des
igna
ted
as
Mas
ter
(or
Bas
e),
and
is r
espo
nsib
le f
or t
rans
mitt
ing
the
sync
hron
isat
ion
data
to
the
Sla
ve S
tatio
ns.
This
sta
tion
will
gen
eral
ly b
e lo
cate
d at
a b
ase
or f
ield
pos
t w
here
a g
ood
ante
nna
is a
vaila
ble.
4.2.
4.2
Hop
ping
Rat
e an
d B
andw
idth
Th
e V
HF-
90M
Fre
quen
cy H
oppi
ng O
ptio
n ha
s a
hop
rate
of 1
00 h
ops
per s
econ
d an
d op
erat
es w
ithin
a 6
.4M
Hz
band
wid
th,
calle
d a
“hop
ban
d”.
Ther
e ar
e ni
ne
cont
iguo
us h
op b
ands
with
in th
e ra
nge
30.2
– 8
7.8M
Hz.
The
refe
renc
e fre
quen
cy
that
is
sele
cted
for
use
by
the
oper
ator
det
erm
ines
whi
ch o
f th
e ho
p ba
nds
is
sele
cted
. Se
vera
l in
divi
dual
hop
ping
net
wor
ks c
an o
pera
te e
ffect
ivel
y, a
nd w
ith
min
imal
inte
rfere
nce
to o
ther
net
wor
ks, w
ithin
the
sam
e ho
p ba
nd. T
he h
op s
peed
an
d ba
ndw
idth
hav
e be
en ri
goro
usly
test
ed a
nd o
ptim
ised
for v
oice
sec
urity
, voi
ce
clar
ity,
ante
nna
band
wid
th,
prop
agat
ion,
an
d fre
quen
cy
plan
ning
to
pe
rmit
co-e
xist
ence
with
oth
er u
sers
.
4.2.
4.3
Pseu
do-R
ando
m H
oppi
ng
A p
seud
o-ra
ndom
(DE
S) f
requ
ency
hop
ping
alg
orith
m p
rovi
des
the
user
with
7.2
x
1016
diff
eren
t hop
ping
cod
es. T
his
resu
lts in
a s
eque
nce
repe
at ti
me
of 2
3 m
illio
n ye
ars,
ens
urin
g a
high
leve
l of s
ecur
ity.
VH
F-90
M U
ser G
uide
page
24
Q-M
AC
Ele
ctro
nics
Pty
Ltd
4.2.
4.4
Rob
ust A
nti-J
am A
lgor
ithm
E
SM
(int
erce
ptio
n) a
nd E
CM
(jam
min
g) a
nd s
poof
ing
are
effe
ctiv
ely
coun
tere
d by
th
e V
HF-
90M
’s f
requ
ency
hop
ping
alg
orith
m.
Eve
n in
the
pre
senc
e of
bad
ly
corr
upte
d sy
nchr
onis
atio
n da
ta,
such
as
oc
curs
in
lo
w
sign
al
stre
ngth
en
viro
nmen
ts,
the
dem
odul
atio
n al
gorit
hm c
ombi
ned
with
the
For
war
d E
rror
C
orre
ctio
n (F
EC
) co
ding
and
tim
e fre
quen
cy d
iver
sity
, pro
vide
s a
robu
st a
nti-j
am
capa
bilit
y. T
he n
et is
resi
stan
t to
reco
rded
and
repl
ayed
syn
c em
issi
ons.
4.2.
4.5
Rap
id S
ynch
roni
satio
n Th
e V
HF-
90M
Fre
quen
cy H
oppi
ng o
ffers
rapi
d sy
nchr
onis
atio
n on
late
ent
ry. T
his
occu
rs w
hen
a ne
twor
k is
alre
ady
com
mun
icat
ing
in fr
eque
ncy
hopp
ing
mod
e an
d an
add
ition
al o
pera
tor
wis
hes
to j
oin
the
netw
ork.
Syn
chro
nisa
tion
time
varie
s be
twee
n 6
and
53 s
econ
ds (w
ith a
n av
erag
e of
26
seco
nds)
. Syn
chro
nisa
tion
time
on m
aste
r sta
rt-up
is e
ven
mor
e ra
pid,
giv
en th
at s
ynch
roni
satio
ns a
re tr
ansm
itted
fa
ster
with
in th
e fir
st fi
ve m
inut
es o
f sta
rt-up
. Syn
chro
nisa
tion
time
varie
s du
e to
th
e ps
eudo
-ran
dom
tim
e an
d fre
quen
cy a
lloca
tion
of s
ynch
roni
satio
n da
ta (b
urst
s)
sent
from
the
Mas
ter S
tatio
n to
the
Sla
ves.
4.2.
4.6
Setti
ng D
ES K
ey-C
ode
A u
niqu
e ho
ppin
g an
d se
cure
cod
e co
mpr
isin
g 12
dig
its m
ust b
e en
tere
d by
the
oper
ator
usi
ng th
e D
TMF
mic
roph
one/
hand
set k
eypa
d or
com
pute
r so
ftwar
e. T
he
sam
e co
de m
ust b
e en
tere
d fo
r eac
h V
HF-
90M
ope
ratin
g w
ithin
the
netw
ork.
The
sa
me
refe
renc
e fre
quen
cy/c
hann
el m
ust a
lso
be s
elec
ted.
Onc
e en
tere
d, th
ere
is
no w
ay to
ret
rieve
the
12-d
igit
code
, thu
s m
akin
g th
e co
de fu
lly s
ecur
e. T
ypic
ally
th
is c
ode
wou
ld b
e ch
ange
d on
a r
egul
ar b
asis
(e.
g. o
nce
ever
y m
onth
dur
ing
peac
etim
e an
d on
ce e
very
wee
k du
ring
host
ilitie
s).
4.2.
4.7
Freq
uenc
y H
oppi
ng -
The
Sync
hron
isat
ion
Proc
ess
Whe
n yo
u fir
st e
nter
into
freq
uenc
y ho
ppin
g m
ode,
the
mas
ter
VHF-
90M
will
be
send
ing
out
sync
(sy
nchr
onis
atio
n) b
urst
s at
a r
apid
rat
e, w
aitin
g fo
r th
e S
lave
S
tatio
ns t
o ‘lo
ck o
n’ t
o th
e sy
nc d
ata
and
begi
n ho
ppin
g. T
ypic
ally
, th
e M
aste
r S
tatio
n w
ill tr
ansm
it be
twee
n 6
and
10 s
ync
burs
ts in
the
first
min
ute.
This
is
desi
gned
in
orde
r to
ena
ble
rapi
d sy
nchr
onis
atio
n w
hen
first
ent
erin
g fre
quen
cy h
oppi
ng m
ode.
The
se s
ync
burs
ts a
re tr
ansm
itted
on
any
of e
ight
syn
c ch
anne
ls
in
a ps
eudo
-ran
dom
pa
ttern
(i.
e.
both
th
e or
der
and
timin
g is
ps
eudo
-ran
dom
).
VH
F-90
M U
ser G
uide
Q-M
AC
Ele
ctro
nics
Pty
Ltd
pa
ge37
5.6.
3.5
Adj
ustin
g Fi
eld
Prog
ram
min
g Se
tting
s To
cyc
le t
hrou
gh t
he f
ield
par
amet
er s
ettin
gs,
use
the
star
* k
ey o
n th
e D
TMF
keyp
ad. T
he d
ispl
ay w
ill c
ycle
as
belo
w a
nd th
en re
peat
.
To p
rogr
am a
ny p
aram
eter
with
in t
he s
elec
tion
pres
s th
e ha
sh #
key
whe
n th
e de
sire
d pa
ram
eter
is d
ispl
ayed
, ref
er to
sec
tions
bel
ow fo
r ind
ivid
ual p
rogr
amm
ing
setti
ngs.
P----
ProG SELcL CH
r
CH t
End
CH no
CodES
CodEH
VH
F-90
M U
ser G
uide
page
36
Q-M
AC
Ele
ctro
nics
Pty
Ltd
Onc
e in
fie
ld p
rogr
amm
ing
mod
e, y
ou c
an p
rogr
am t
he s
ettin
gs a
s in
dica
ted
on
the
follo
win
g pa
ges.
Afte
r an
y co
mm
and
sequ
ence
, the
dis
play
will
defa
ult t
o th
e ab
ove
disp
lay.
If
no s
elec
tions
are
mad
e w
ithin
60
seco
nds,
the
VH
F-90
M w
ill
reve
rt to
its
sta
ndar
d fre
quen
cy d
ispl
ay.
Dur
ing
field
pro
gram
min
g m
ode
the
disp
lay
will
flash
to in
dica
te th
at th
is m
ode
is a
ctiv
e.
5.6.
3.3
Fiel
d Pr
ogra
mm
ing
Func
tion
Key
s S
tand
ard
func
tion
keys
for f
ield
pro
gram
min
g ar
e as
follo
ws:
*A
dvan
ce to
nex
t pro
gram
min
g pa
ram
eter
.
#B
egin
and
End
(Sav
e) fo
r par
amet
er s
ettin
gs.
Not
e:B
y pr
essi
ng th
e P
TT s
witc
h on
the
hand
set,
you
can
abor
t the
pr
ogra
mm
ing
func
tion
at a
ny ti
me.
5.6.
3.4
Exiti
ng F
ield
Pro
gram
min
g M
ode
To e
xit t
he fi
eld
prog
ram
min
g m
ode,
sim
ply
cycl
e th
roug
h th
e di
spla
y pa
ram
eter
un
til th
e di
spla
y re
ads
“ End
” as
bel
ow th
en p
ress
the
HA
SH
# k
ey o
n th
e D
TMF
keyp
ad.
The
disp
lay
shou
ld a
ppea
r as
fol
low
s, a
nd t
hen
reve
rt to
the
sta
ndar
d fre
quen
cy d
ispl
ay:
This
dis
play
sho
ws
that
the
VH
F-90
M is
abo
ut to
exi
t fro
m th
e fie
ld p
rogr
amm
ing
mod
e.
NO
TE: A
ny k
ey o
r act
ivat
ion
of P
TT w
ill c
ance
l the
fiel
d pr
ogra
mm
ing
mod
e al
so.
Whe
neve
r exi
ting
or a
borti
ng th
e fie
ld p
rogr
amm
ing
mod
e, th
e V
HF-
90M
will
rese
t to
the
stan
dard
cha
nnel
freq
uenc
y di
spla
y.
End
VH
F-90
M U
ser G
uide
Q-M
AC
Ele
ctro
nics
Pty
Ltd
pa
ge25
Onc
e a
sync
bur
st is
rece
ived
by
the
Sla
ve S
tatio
n, it
will
‘lock
’ ont
o th
e sy
nc d
ata
cont
aine
d w
ithin
th
at
burs
t (tr
ansm
issi
on)
and
will
then
pr
ocee
d to
ho
p in
sy
nchr
onis
atio
n w
ith th
e M
aste
r Sta
tion.
At t
his
poin
t, it
wou
ld b
e no
rmal
to e
xpec
t th
e op
erat
or o
f th
e S
lave
Sta
tion
to i
ndic
ate
that
the
y ar
e sy
nchr
onis
ed u
sing
vo
ice.
Onc
e sy
nchr
onis
ed, y
ou c
an p
roce
ed w
ith c
omm
unic
atio
ns a
s no
rmal
. Thi
s w
hole
syn
chro
nisa
tion
proc
ess
wou
ld n
orm
ally
take
less
than
60
seco
nds
but m
ay
exte
nd to
two
min
utes
.
NO
TE: T
he M
aste
r Sta
tion
does
not
sho
w a
ny in
dica
tion
of s
ynch
roni
satio
n st
atus
on
its
disp
lay,
as
the
Sla
ve S
tatio
n do
es. T
his
is b
ecau
se th
ere
may
be
mor
e th
an
one
Sla
ve S
tatio
n in
the
hopp
ing
netw
ork.
4.2.
4.8
Esta
blis
hing
Syn
chro
nisa
tion
from
a M
aste
r Sta
tion
Whe
n fre
quen
cy h
oppi
ng m
ode
is f
irst
ente
red,
the
Sla
ve V
HF-
90M
will
be
scan
ning
the
eigh
t syn
c ch
anne
ls. T
hese
eig
ht s
ync
chan
nels
are
pre
dete
rmin
ed
by t
he c
ombi
natio
n of
tw
o di
ffere
nt f
acto
rs,
bein
g th
e ch
anne
l fre
quen
cy in
use
an
d th
e pr
ogra
mm
ed 1
2 di
git h
op c
ode.
The
hop
ping
pat
tern
is a
lso
dete
rmin
ed b
y th
ese
two
setti
ngs.
On
com
men
cem
ent
of h
oppi
ng,
the
mas
ter
star
ts f
rom
a
rand
om p
ositi
on in
the
sequ
ence
.
Onc
e th
e sy
nc b
urst
from
the
Mas
ter S
tatio
n ha
s be
en re
ceiv
ed, t
he V
HF-
90M
will
‘lock
’ ont
o th
e sy
nc d
ata
cont
aine
d w
ithin
that
bur
st. T
he s
ync
data
con
veys
the
exac
t pos
ition
in th
e ho
p se
quen
ce, f
rom
the
mas
ter t
o th
e sl
ave.
Thi
s al
low
s it
to
proc
eed
to h
op in
syn
chro
nisa
tion
with
the
Mas
ter
Sta
tion.
Onc
e sy
nchr
onis
ed,
the
rece
ive
audi
o w
ill be
ava
ilabl
e an
d th
e “ h
” w
ill ap
pear
ste
ady
on y
our
disp
lay.
Fo
r exa
mpl
e:
The
disp
lay
abov
e sh
ows
that
the
Sla
ve S
tatio
n is
now
syn
chro
nise
d w
ith th
e M
aste
r S
tatio
n an
d co
mm
unic
atio
ns m
ay c
omm
ence
.
32.02h
VH
F-90
M U
ser G
uide
page
26
Q-M
AC
Ele
ctro
nics
Pty
Ltd
4.2.
4.9
Late
Ent
ry S
ynch
roni
satio
n Th
ere
is o
nly
one
esse
ntia
l di
ffere
nce
rela
ting
to t
he s
ynch
roni
satio
n pr
oces
s w
hen
a S
lave
Sta
tion
atte
mpt
s la
te e
ntry
to th
e ho
ppin
g ne
twor
k. A
fter t
he fi
rst f
ive
min
utes
of
the
Mas
ter
Stat
ion
havi
ng e
nter
ed f
requ
ency
hop
ping
mod
e, t
he
num
ber a
nd d
urat
ion
of s
ync
burs
ts b
eing
tran
smitt
ed w
ill re
duce
slig
htly
. The
rate
of
syn
c bu
rsts
will
redu
ce to
an
aver
age
of o
ne b
urst
eve
ry 7
5 se
cond
s.
How
ever
, the
tim
ing
(and
ord
er)
of th
e sy
nc b
urst
s st
ill re
mai
ns p
seud
o-ra
ndom
. Th
e sy
nc b
urst
s ca
n be
as
little
as
ten
mill
isec
onds
apa
rt or
as
grea
t as
150
se
cond
s ap
art.
The
impl
icat
ion
of
the
abov
e fa
ctor
is
th
at
late
en
try
sync
hron
isat
ion
coul
d co
ncei
vabl
y ta
ke lo
nger
tha
n sy
nchr
onis
atio
n im
med
iate
ly
afte
r bo
th
stat
ions
en
ter
frequ
ency
ho
ppin
g m
ode.
O
nce
both
st
atio
ns
are
sync
hron
ised
the
y w
ill m
aint
ain
this
sta
tus.
The
fol
low
ing
page
s ou
tline
var
ious
in
stan
ces
whe
re s
ynch
roni
satio
n m
ay b
e co
mpr
omis
ed.
Ther
e ar
e tw
o m
ain
fact
ors
whi
ch a
llow
syn
chro
nisa
tion
to b
e m
aint
aine
d, o
utlin
ed b
elow
:
1.
The
com
plet
enes
s of
the
data
whi
ch is
tran
smitt
ed w
ith s
ync
burs
ts. E
ach
sync
bur
st c
onta
ins
deta
iled
inst
ruct
ions
for
the
Sla
ve S
tatio
n re
gard
ing
the
exac
t cu
rren
t po
sitio
n in
the
hop
ping
seq
uenc
e (th
e pa
ttern
of
the
sequ
ence
is p
rede
term
ined
by
the
chan
nel f
requ
ency
and
hop
cod
e).
2.
The
accu
racy
(st
abilit
y) o
f the
TC
XO
(Te
mpe
ratu
re C
ompe
nsat
ed C
ryst
al
Osc
illato
r) em
ploy
ed w
ithin
the
VHF-
90M
, whi
ch a
llow
s th
e tim
ing
for b
oth
stat
ions
to
be
pe
rfect
ly
sync
hron
ised
. Th
e V
HF-
90M
sl
aves
w
ill au
tom
atic
ally
syn
chro
nise
thei
r TC
XO
to th
e m
aste
r sta
tion.
4.2.
4.10
Syn
chro
nisa
tion
Diff
icul
ties
For a
fully
syn
chro
nise
d S
lave
, the
dis
play
sho
ws
the
sync
hron
isat
ion
indi
cato
r as
a co
nsta
ntly
illu
min
ated
“h” a
nd n
ot fl
ashi
ng.
Whe
n di
fficu
lty is
exp
erie
nced
with
mai
ntai
ning
syn
chro
nisa
tion
(whi
ch m
ay o
ccur
in
ver
y no
isy
cond
ition
s), t
he s
ynch
roni
satio
n in
dica
tor (
only
sho
wn
on th
e di
spla
y of
the
Sla
ve S
tatio
n),
will
chan
ge f
rom
a c
onst
ant
“ h”
to a
fas
t fla
shin
g “h
”. Th
e in
dica
tor
will
only
fla
sh,
in t
he e
vent
tha
t te
n co
nsec
utiv
e sy
nc b
urst
s ar
e no
t re
ceiv
ed. W
hils
t in
this
mod
e, it
sho
uld
still
be
poss
ible
to c
omm
unic
ate
with
oth
er
stat
ions
in th
e ho
ppin
g ne
twor
k. H
owev
er, t
he li
nk m
ay b
e po
or, a
lerti
ng th
e us
er
to th
e fa
ct th
at s
ync
may
be
lost
. If a
furth
er s
ync
burs
t is
rece
ived
suc
cess
fully
, th
e sy
nchr
onis
atio
n in
dica
tor
will
be c
onst
antly
illu
min
ated
onc
e m
ore,
indi
catin
g th
at th
e di
fficu
lties
with
syn
chro
nisa
tion
have
bee
n ov
erco
me.
VH
F-90
M U
ser G
uide
Q-M
AC
Ele
ctro
nics
Pty
Ltd
pa
ge35
Th
e S
lave
will
auto
det
ect t
he M
aste
r and
sho
w th
e w
ord
“CLO
nE” o
n th
e di
spla
y. T
he m
aste
r will
disp
lay
a sc
rollin
g m
essa
ge:
“ HIt
SECto
Pr
OG”.
If
the
SEC
(Sec
ure)
key
is p
ress
ed a
nd h
eld
on th
e M
aste
r, th
e pr
oces
s of
cl
onin
g w
ill be
gin
and
all p
rogr
amm
ing
setti
ngs
from
the
Mas
ter
will
be
copi
ed t
o th
e S
lave
with
the
exc
eptio
n of
the
DE
S h
op c
odes
, (m
anua
l en
try o
nly)
.
If
the
clon
ing
oper
atio
n fa
ils, a
mes
sage
“ FAIL”
will
be
disp
laye
d, o
ther
wis
e th
e S
lave
will
disp
lay
“ End
” an
d th
e pr
oces
s ca
n be
rep
eate
d on
the
next
S
lave
VH
F-90
M.
5.6.
3 D
TMF
Han
dset
Fie
ld P
rogr
amm
ing
5.6.
3.1
Intr
oduc
tion
Not
e th
at t
he f
ollo
win
g in
form
atio
n on
ly r
elat
es to
the
VH
F-90
M w
here
fie
ld
prog
ram
min
g ha
s be
en e
nabl
ed.
Fiel
d pr
ogra
mm
ing
is a
vaila
ble
in V
HF-
90M
s th
at h
ave
had
this
func
tion
enab
led
(via
the
PC
Pro
gram
min
g P
acka
ge).
In o
rder
to
use
the
field
pro
gram
min
g fu
nctio
n, a
DTM
F ha
ndse
t is
requ
ired.
5.6.
3.2
Ente
ring
Fiel
d Pr
ogra
mm
ing
Mod
e To
com
men
ce fi
eld
prog
ram
min
g m
ode,
pre
ss a
nd h
old
both
the
Cha
nnel
Up
and
Cha
nnel
Dow
n ke
ys a
t the
sam
e tim
e fo
r 2 s
econ
ds w
hen
the
unit
is p
ower
ed o
n.
At t
his
poin
t, th
e di
spla
y w
ill ap
pear
as
follo
ws:
This
dis
play
sho
ws
that
the
VH
F-90
M is
in fi
eld
prog
ram
min
g m
ode.
ProG
VH
F-90
M U
ser G
uide
page
34
Q-M
AC
Ele
ctro
nics
Pty
Ltd
5.6.
Pr
ogra
mm
ing
the
VHF-
90M
5.6.
1 PC
Pro
gram
min
g M
ode
The
PC p
rogr
amm
ing,
or
deal
er m
ode,
is u
sed
to p
rogr
am th
e VH
F-90
M w
ith a
ll th
e se
tting
s re
quire
d fo
r ope
ratio
n.
This
func
tion
can
be tu
rned
on,
by
hold
ing
the
chan
nel u
p an
d ch
anne
l dow
n ke
ys
whe
n th
e VH
F-90
M fi
rst p
ower
s on
, unt
il th
e m
essa
ge “ r
S232
” is
disp
laye
d on
the
front
pan
el.
5.6.
2 C
lone
Mod
e To
ent
er c
lone
mod
e, o
ne V
HF-
90M
mus
t be
desi
gnat
ed th
e m
aste
r and
all
othe
rs
are
slav
es t
o be
clo
ned.
The
VH
F-90
M m
ust
be p
rogr
amm
ed u
sing
the
DTM
F ha
ndse
t, P
C p
rogr
amm
er o
r Fill
gun
to th
e co
rrec
t set
tings
as
requ
ired,
bef
ore
the
clon
e op
erat
ion
is p
erfo
rmed
. The
clo
ne m
ode
can
only
be
ente
red
if th
e C
LON
E pr
ogra
mm
ing
optio
n is
en
able
d in
al
l V
HF-
90M
s to
be
cl
oned
an
d in
th
e de
sign
ated
mas
ter
VH
F-90
M.
The
clon
e m
ode
requ
ires
a sp
ecia
l ada
ptor
cab
le
avai
labl
e fro
m Q
-MA
C fo
r thi
s fu
nctio
n to
ope
rate
.
5.6.
2.1
How
to C
lone
To
ent
er th
e cl
one
mod
e, p
ut th
e de
sign
ated
mas
ter
VH
F-90
M in
to p
rogr
amm
ing
mod
e by
hol
ding
the
cha
nnel
up
and
dow
n ke
ys p
ress
ed a
nd t
urni
ng t
he
VH
F-90
M o
n.
The
disp
lay
will
read
“rS
232”
as
abov
e
E
nsur
e th
e sl
ave
VH
F-90
M is
con
nect
ed to
the
mas
ter (
turn
ed o
n) w
ith
the
adap
tor c
able
and
ens
ure
the
Sla
ve is
turn
ed O
FF.
Tu
rn th
e S
lave
VH
F-90
M o
n.
rS23
2
VH
F-90
M U
ser G
uide
Q-M
AC
Ele
ctro
nics
Pty
Ltd
pa
ge27
NO
TE:
It is
de
sira
ble
that
th
e op
erat
ors
of
Sla
ve
Sta
tions
m
onito
r th
e sy
nchr
onis
atio
n in
dica
tor.
Ther
e ar
e a
num
ber
of
reas
ons
why
di
fficu
lties
m
ay
be
expe
rienc
ed
with
sy
nchr
onis
atio
n. T
he m
ost l
ikel
y re
ason
s ar
e as
follo
ws:
1.
Pro
paga
tion
is u
nfav
oura
ble
due
to o
bstru
ctio
ns o
r ter
rain
.
2.
Ther
e is
hig
h el
ectri
cal n
oise
from
com
pute
rs, a
ir co
nditi
oner
s, e
tc.
3.
The
Mas
ter
Sta
tion
has
been
sw
itche
d of
f or
set b
ack
to fi
xed
frequ
ency
m
ode.
4.
Stro
ng e
nem
y ja
mm
ing
has
been
dep
loye
d w
hich
is in
terfe
ring
with
the
sy
nc fr
eque
ncie
s.
NO
TE: A
fter t
wo
hour
s w
ithou
t a v
alid
syn
c bu
rst,
a S
lave
Sta
tion
will
reve
rt to
the
unsy
nchr
onis
ed s
tate
and
the
flash
ing
sync
hron
isat
ion
indi
cato
r w
ill be
gin
to s
tart
flash
ing.
The
sta
tion
will
then
sca
n on
ly th
e sy
nc c
hann
els
and
try to
re-
lock
ont
o th
e M
aste
r Sta
tion
agai
n.
4.2.
4.11
Sel
ectiv
e C
allin
g in
Fre
quen
cy H
oppi
ng
The
VH
F-90
M i
ncor
pora
tes
a S
elca
ll fa
cilit
y, w
hich
can
be
used
in
frequ
ency
ho
ppin
g m
ode,
as
wel
l as
on fi
xed
chan
nel o
r se
cure
mod
es. W
hen
oper
atin
g in
fre
quen
cy h
oppi
ng m
ode,
Sel
calls
may
onl
y be
sen
t an
d re
ceiv
ed b
etw
een
trans
ceiv
ers
with
in th
e sa
me
hopp
ing
netw
ork.
VH
F-90
M U
ser G
uide
page
28
Q-M
AC
Ele
ctro
nics
Pty
Ltd
5.
AD
VAN
CED
OPE
RA
TIO
N O
F TH
E VH
F-90
M
5.1.
C
hann
el S
cann
ing
Mod
e (S
CA
N)
Cha
nnel
Sca
nnin
g m
ode
will
sca
n al
l the
spe
cial
pro
gram
med
cha
nnel
s fo
r th
e pr
esen
ce o
f RS
SI o
r C
TCS
S (
wha
teve
r is
set
), ab
ove
the
calc
ulat
ed b
ackg
roun
d no
ise.
The
func
tion
can
be tu
rned
off
and
on b
y br
iefly
pre
ssin
g th
e O
N/O
FF b
utto
n an
d th
eH
OP
key
at th
e sa
me
time.
Thi
s ke
y se
quen
ce w
ill to
ggle
the
func
tion
on a
nd
off.
If a
sign
al is
det
ecte
d, t
he s
cann
ing
func
tion
will
sto
p on
the
cha
nnel
of
inte
rest
an
d re
mai
n on
tha
t ch
anne
l un
til t
he r
ecei
ved
sign
al p
rese
nt c
ease
s an
d th
e ch
anne
l tim
eout
has
take
n pl
ace.
The
cha
nnel
tim
eout
is u
sual
ly s
et a
roun
d fo
ur
seco
nds
and
can
be c
hang
ed a
s re
quire
d. T
he s
can
func
tion
will
dw
ell o
n ea
ch
chan
nel
for
arou
nd 5
0ms
whe
n sc
anni
ng i
n th
e ab
senc
e of
any
sig
nal.
The
chan
nel s
cann
ing
mod
e is
onl
y av
aila
ble
whe
n th
e V
HF-
90M
is in
lega
cy m
ode
(fixe
d fre
quen
cy).
5.2.
Va
riabl
e Fr
eque
ncy
Dis
play
Th
e V
aria
ble
Freq
uenc
y D
ispl
ay m
ode
will
ena
ble
the
user
to
ente
r th
e de
sire
d fre
quen
cy i
nto
the
VH
F-90
M.
The
func
tion
can
be t
urne
d of
f an
d on
by
brie
fly
pres
sing
the
ON
/OFF
but
ton
and
the
Cha
nnel
Dow
n ke
y at
the
sam
e tim
e. T
his
key
sequ
ence
will
togg
le th
e fu
nctio
n on
and
off.
Whe
n fir
st tu
rned
on,
the
right
han
d (le
ast s
igni
fican
t) di
git w
ill fla
sh, i
ndic
atin
g th
e en
try t
hat
will
be c
hang
ed.
The
chan
nel
up a
nd c
hann
el d
own
will
mov
e th
e fla
shin
g di
git f
rom
left
to r
ight
on
the
frequ
ency
dis
play
. The
vol
ume
knob
is th
en
used
to
chan
ge t
he s
elec
ted
digi
t as
req
uire
d. W
hen
com
plet
e, P
TT is
use
d to
lo
ck t
he s
ettin
gs i
nto
plac
e. T
he V
HF-
90M
will
rem
ain
in t
his
mod
e un
til t
he
chan
nel
up o
r do
wn
keys
are
pre
ssed
to
retu
rn t
he u
nit
to s
tand
ard
mod
e. A
ll ot
her
mod
es a
re a
vaila
ble
whi
lst
usin
g th
is s
ettin
g. W
hen
PTT
is
pres
sed,
the
ch
anne
l nu
mbe
r w
ill d
ispl
ay a
s “ UF”
to
indi
cate
tha
t yo
u ar
e op
erat
ing
on a
va
riabl
e fre
quen
cy c
hann
el.
VH
F-90
M U
ser G
uide
Q-M
AC
Ele
ctro
nics
Pty
Ltd
pa
ge33
5.4.
5 Se
lcal
l Fun
ctio
n Su
mm
ary
Bel
ow is
a s
umm
ary
of t
he s
teps
(ke
y pr
esse
s) in
volv
ed in
wor
king
thr
ough
the
S
elca
ll fu
nctio
ns.
Send
Sel
call
(DTM
F ke
ypad
)
*345
6*Th
is k
ey s
eque
nce
will
sen
d th
e se
lcal
l ID
”345
6”
Res
end
Last
Sel
call
(DTM
F ke
ypad
)
**Th
is k
ey s
eque
nce
will
sen
d th
e la
st s
elca
ll ID
aga
in
Ans
wer
to S
ent S
elca
ll (D
TMF
keyp
ad) **
This
key
seq
uenc
e w
ill s
end
the
last
rece
ived
sel
call
ID if
the
ID is
on
the
Dis
play
Cle
ar a
nd s
tart
aga
in (D
TMF
keyp
ad)
or p
ress
the
PTT
but
ton
#Th
is k
ey s
eque
nce
will
rese
t to
star
t of S
elca
ll pr
oced
ure
5.5.
R
ecei
ved
Sign
al S
tren
gth
Indi
cato
r (R
SSI)
The
rece
ived
sig
nal s
treng
th in
dica
tor
is a
n ad
vanc
ed fe
atur
e, w
hich
ena
bles
the
disp
lay
on th
e V
HF-
90M
to fu
nctio
n as
eith
er a
dig
ital b
ar g
raph
or r
eado
ut in
dB
m
of th
e re
ceiv
ed s
igna
l stre
ngth
. The
opt
ion
of b
ar g
raph
or d
Bm
is s
elec
tabl
e in
PC
pr
ogra
mm
ing
mod
e.
The
func
tion
can
be tu
rned
off
and
on b
y br
iefly
pre
ssin
g th
e O
N/O
FF b
utto
n an
d th
eC
hann
el U
p ke
y at
the
sam
e tim
e. T
his
key
sequ
ence
will
togg
le th
e fu
nctio
n on
and
off.
In b
ar g
raph
mod
e, t
he d
ispl
ay w
ill in
dica
te t
he r
ecei
ved
sign
al w
ith a
ser
ies
of
verti
cal l
ines
that
go
from
left
to r
ight
of t
he d
ispl
ay. E
ach
incr
emen
t cor
resp
onds
to
a 5
dB s
igna
l in
crea
se.
The
disp
lay
will
rea
ds f
rom
–12
0dB
m t
o –7
0dB
m.
In
dBm
mod
e, th
e di
gita
l dis
play
indi
cate
s th
e si
gnal
in d
Bm
dire
ctly
.
VH
F-90
M U
ser G
uide
page
32
Q-M
AC
Ele
ctro
nics
Pty
Ltd
failu
re.
If th
e S
elca
ll is
not
suc
cess
ful,
it m
ay b
e du
e to
ina
ppro
pria
te c
hann
el
sele
ctio
n or
on
chan
nel
inte
rfere
nce
or t
he V
HF-
90M
bei
ng c
alle
d m
ay b
e sw
itche
d of
f.
The
disp
lay
will
reve
rt to
the
def
ault
chan
nel
disp
lay
as s
oon
as a
Sel
call
conf
irmat
ion
is re
ceiv
ed, o
r if t
he c
all i
s un
succ
essf
ul.
5.4.
3 Se
lcal
l Res
end
Not
e th
at th
e la
st r
ecor
ded
Sel
call
can
be r
esen
t qui
ckly
and
eas
ily, b
y pr
essi
ng
the
STA
R *
key
twic
e.
5.4.
4 R
ecei
ving
a S
elca
ll W
hen
rece
ivin
g a
Sel
call,
a s
erie
s of
con
tinuo
us lo
ud b
eeps
can
be
hear
d. T
his
is
the
Sel
call
Ala
rm. I
n ad
ditio
n, th
e di
spla
y w
ill fla
sh th
e S
elca
ll ID
of t
he s
tatio
n th
at
is c
allin
g yo
u. F
or e
xam
ple:
This
flas
hing
dis
play
sho
ws
that
you
hav
e re
ceiv
ed a
ca
ll fro
m S
tatio
n N
o. 4
321.
Res
pond
to
the
call
imm
edia
tely
, by
pre
ssin
g th
e m
icro
phon
e PT
T sw
itch
and
esta
blis
hing
voi
ce c
onta
ct w
ith t
he c
allin
g st
atio
n. P
ress
ing
the
PTT
sw
itch
imm
edia
tely
ca
ncel
s th
e S
elca
ll A
larm
. O
nce
the
Sel
call
Ala
rm
has
been
ca
ncel
led,
the
disp
lay
will
reve
rt to
the
defa
ult c
hann
el d
ispl
ay.
If th
e S
elca
ll A
larm
is
not
canc
elle
d, t
he a
udib
le a
larm
will
time-
out
afte
r 60
se
cond
s. H
owev
er, t
he d
ispl
ay w
ill c
ontin
ue to
sho
w th
at a
cal
l has
bee
n re
ceiv
ed
by f
lash
ing
the
Sel
call
ID o
f th
e ca
lling
stat
ion,
unt
il th
e P
TT s
witc
h or
oth
er
oper
ator
con
trols
are
pre
ssed
. Th
is p
rovi
des
a ca
ll di
spla
y fa
cilit
y fo
r w
hen
the
radi
o is
una
ttend
ed. H
owev
er, i
f ano
ther
cal
l is
rece
ived
bef
ore
the
radi
o op
erat
or
retu
rns,
the
new
cal
l will
be d
ispl
ayed
and
the
prev
ious
cal
l will
be o
verw
ritte
n.
If so
meo
ne h
as s
ent y
ou a
Sel
call
whi
lst t
he r
adio
has
bee
n le
ft un
atte
nded
, you
w
ill kn
ow im
med
iate
ly w
ho h
as c
alle
d yo
u by
look
ing
at th
e fla
shin
g S
elca
ll ID
on
the
disp
lay.
To
retu
rn t
heir
call,
sim
ply
pres
s th
e S
TAR
* k
ey t
wic
e. T
his
will
in
itiat
e th
e S
elca
ll R
esen
d fu
nctio
n to
the
callin
g pa
rty.
C.43211
VH
F-90
M U
ser G
uide
Q-M
AC
Ele
ctro
nics
Pty
Ltd
pa
ge29
5.3.
W
hisp
er M
ode
The
Whi
sper
mod
e se
tting
will
incr
ease
the
sen
sitiv
ity o
f th
e m
icro
phon
e an
d de
crea
se t
he a
vaila
ble
audi
o le
vel
into
the
hea
dset
s. T
his
is i
deal
for
cov
ert
oper
atio
ns.
5.4.
Se
lect
ive
Cal
ling
(Sel
call)
S
elca
ll al
low
s th
e m
akin
g an
d re
ceiv
ing
calls
to /
from
ano
ther
rad
io, b
y a
sim
ple
met
hod
of d
igita
l si
gnal
ling.
Sel
call
allo
ws
a co
ded
aler
t si
gnal
to
be s
ent
to a
sp
ecifi
c ra
dio
user
, ind
icat
ing
that
they
are
bei
ng c
alle
d. If
the
selc
all i
s re
ceiv
ed
succ
essf
ully
by
the
othe
r ra
dio
user
, th
eir
VH
F-90
M w
ill au
tom
atic
ally
tra
nsm
it a
posi
tive
conf
irmat
ion
aler
t bac
k to
the
VH
F-90
M w
hich
sen
t the
sig
nal.
Gro
up c
alls
can
als
o be
use
d by
onl
y en
terin
g th
e pa
rtial
num
ber o
f the
gro
ups
to
be c
alle
d. F
or e
xam
ple:
To
cal
l an
indi
vidu
al w
ith n
umbe
r 123
4 en
ter t
he n
umbe
r 123
4 an
d se
nd. T
he
indi
vidu
al c
alle
d pa
rty w
ill re
spon
d or
the
uni
t w
ill di
spla
y fa
il af
ter
a fe
w
seco
nds.
To
cal
l a
grou
p, e
nter
456
. Th
is w
ill ca
ll al
l pa
rties
456
0 to
456
9. N
o co
nfirm
atio
n w
ill be
dis
play
ed o
n a
grou
p ca
ll.
To
cal
l a g
roup
, ent
er 1
. Thi
s w
ill ca
ll al
l par
ties
1000
to 1
999.
To u
se S
elca
ll, t
he r
adio
to
be c
omm
unic
ated
with
mus
t al
so h
ave
the
Sel
call
func
tion.
The
VH
F-90
M u
ses
a pr
oprie
tary
sel
call
form
at b
oth
in H
oppi
ng a
nd fi
xed
frequ
ency
mod
es.
5.4.
1 D
TMF
Han
dset
Th
e fo
llow
ing
illus
tratio
n sh
ows
the
oper
ator
con
trols
on
the
optio
nal
DTM
F ha
ndse
t. S
ectio
n 5.
6.3
conc
erni
ng F
ield
Pro
gram
min
g al
so c
over
s op
erat
ion
of th
e D
TMF
mic
roph
one
/ ha
ndse
t. Th
e D
TMF
hand
set
cont
ains
a m
icro
proc
esso
r an
d m
ust b
e co
nnec
ted
to th
e VH
F-90
M b
efor
e th
e VH
F-90
M is
sw
itche
d on
. Th
e V
HF-
90M
will
aut
o de
tect
the
pre
senc
e of
the
DTM
F M
icro
phon
e w
hen
the
pow
er is
sw
itche
d on
, the
retu
rn c
ode 47
001 s
houl
d sh
ow o
n th
e VH
F-90
M d
ispl
ay
durin
g th
e po
wer
on
sequ
ence
as
belo
w.
VH
F-90
M U
ser G
uide
page
30
Q-M
AC
Ele
ctro
nics
Pty
Ltd
Num
eric
Key
s
HA
SH K
ey
STA
R K
ey
Pre
ss to
talk
(P
TT) s
witc
h
Num
eric
Key
s
HA
SH K
ey
STA
R K
ey
Pre
ss to
talk
(P
TT) s
witc
h
This
dis
play
sho
ws
that
the
DTM
F m
icro
phon
e ha
s be
en d
etec
ted.
5.4.
2 Se
ndin
g a
Selc
all
To s
end
a S
elca
ll us
e th
e D
TMF
keyp
ad o
n th
e ha
ndse
t.
Firs
t pre
ss th
e S
TAR
# k
ey. P
ress
ing
this
key
initi
ates
the
Sel
call
proc
edur
e. T
he
disp
lay
will
app
ear a
s fo
llow
s:
4700
1
VH
F-90
M U
ser G
uide
Q-M
AC
Ele
ctro
nics
Pty
Ltd
pa
ge31
This
dis
play
sho
ws
that
Sel
call
has
been
initi
ated
Nex
t, pr
ess
the
num
eric
key
s to
sel
ect
the
appr
opria
te S
elca
ll ID
(fo
ur d
igits
) of
th
e st
atio
n to
be
cont
acte
d. A
s ea
ch i
ndiv
idua
l nu
mer
ic k
ey i
s pr
esse
d, t
he
corr
espo
ndin
g nu
mbe
r w
ill ap
pear
on
the
disp
lay
until
all
num
bers
hav
e be
en
sele
cted
. A
t th
is p
oint
all
num
bers
will
app
ear
on t
he d
ispl
ay t
oget
her.
For
exam
ple:
This
dis
play
sho
ws
that
Sel
call
ID 1
234
has
been
sel
ecte
d.
If in
the
pro
cess
of
sele
ctin
g th
e Se
lcal
l ID
, an
inco
rrect
num
ber
is p
ress
ed,
the
disp
lay
can
be
clea
red
by
pres
sing
an
d re
leas
ing
the
PTT
sw
itch
on
the
mic
roph
one
hand
set
and
ente
ring
the
selc
all
mod
e ag
ain
with
th
e *
ke
y.
Alte
rnat
ivel
y th
e ha
sh #
key
can
be
used
to re
set t
he p
roce
ss.
Onc
e th
e S
elca
ll ID
has
bee
n co
rrec
tly s
elec
ted,
pre
ss th
e S
TAR
* k
ey a
gain
to
send
the
Sel
call.
A to
ne c
an b
e he
ard
as th
e S
elca
ll is
bei
ng tr
ansm
itted
, and
the
disp
lay
will
app
ear a
s fo
llow
s:
This
dis
play
sho
ws
that
Sel
call
is b
eing
sen
t - i.
e. in
tran
smit
mod
e.
Sev
eral
sec
onds
afte
r pr
essi
ng th
e S
TAR
* k
ey to
sen
d th
e S
elca
ll, a
brie
f bee
p ca
n be
hea
rd. T
his
is th
e po
sitiv
e co
nfirm
atio
n (k
now
n as
the
Sel
call
Con
firm
atio
n)
bein
g tra
nsm
itted
from
the
calle
d st
atio
n to
let t
he u
ser
know
that
the
Sel
call
has
been
rece
ived
suc
cess
fully
and
the
Sel
call
num
ber o
f the
sta
tion
calle
d w
ill a
ppea
r in
the
dis
play
. If
ther
e is
no
Sel
call
Con
firm
atio
n, t
he p
roce
dure
sho
uld
be
repe
ated
as
outli
ned
abov
e. T
he d
ispl
ay w
ill a
lso
indi
cate
if a
cal
l has
fai
led.
A
new
cal
l on
the
sam
e ch
anne
l or a
new
cha
nnel
can
be
sele
cted
in th
e ev
ent o
f a
SEndSELC
L
1234
