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8/12/2019 ATR720C Install Oper Eng
1/14
ATR 720 C
VHF TRANSCEIVER
InstallationAnd
Operation
HandbookNo.:00.!000e
Iss"e : #0#$$$
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&e(erbestra)e 2 ATR 720 C Co''"ni%ations Trans%ei*er!+!7, -aal pae 2
The following
Installation and Operationis valid for the ATR 720 C Co''"ni%ations Trans%ei*er
Table o/ Contents
SECTION &ENERA INFOR1ATION.........................................................
. INTRO34CTION.................................................................................................................
.2 54R5OSE OF E64I51ENT..............................................................................................
. 3ESI&N FEAT4RES..........................................................................................................
. 5O-ER RE64IRE1ENTS................................................................................................
., Te%8ni%al C8ara%teristi%s................................................................................................
.+ 4nits and A%%essories S"pplied..................................................................................... +
.7 A%%essories Re9"ired b"t not S"pplied.........................................................................+
2 SECTION II Installation and Operation................................................... 7
2. &eneral...............................................................................................................................72.2 4npa%kin and Inspe%tin............................................................................................... 7
2.2.1 Electrical Bench Test.................................................................................................... 82.2.2 Microphone Adjustment................................................................................................ 82.2.3 idetone Adjustment..................................................................................................... !2.2." E#ternal Audio$%re&uenc' (olume Adjustment............................................................ !2.2.) *nterphone *nterconnection........................................................................................... !
2. ATR 720 INSTAATION................................................................................................0
2. 5S2!Installation........................................................................................................0
2., Antenna Installation........................................................................................................0
2.+ Cablin............................................................................................................................. 0
2.7 O5ERATION.....................................................................................................................
2.+.1 ,eneral....................................................................................................................... 132.+.2 AT- +2 / /0MM Multifunction /ontrol.................................................................... 132.+.3 0T *TAAT*0 /4E/506T.......................................................................... 1"
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SECTION &ENERA INFOR1ATION
. INTRO34CTION
This manual contains information relative to the ph'sical7 mechanical and electrical characteristics of the communications transceiver AT- +2 manufactured 9' %ilser Electronic,m94 .
.2 54R5OSE OF E64I51ENT
The AT- +2 / /0MM com9ines in a single panel mounted unit a +2 channel (4% /0MMTransceiver with a micropro:essor controlled fre&uenc' entr'
. 3ESI&N FEAT4RES
A. Controls
Multi %unction /ontrol
0n 0ff witch (olume /ontrol
Automatic s&uelch eliminates pilot responsivilit' for continuousl' monitorings&uelch adjustment. &uelch threshold automaticall' adjusts to open on reada9le signals. ; switch in pulled opens s&uelch to test /0MM receiver sensitivit' and to listen e#tremel' wea< signals.
i&uid /ristal =ispla'
5e'9oard with 1) t'picall' .) dB from ?( to 1 m(@ minimi:es audio level variations.
C. Constr"%tion
Modular construction for simple maintenance.
-ac< mounted7 remova9le from the front panel.
Anti$theft loc
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., Te%8ni%al C8ara%teristi%s
ATR 720 Trans%ei*er
Spe%i/i%ation C8ara%teristi%
-T/A /0M*A/E
/omm Transmitter -T/A =o 1)+7 /lass "
E6-0/AE E= 2"
/omm -eceive -T/A =o 1)7 /lass /
E6-0/AE E= 23
Environmental
Temperature -ange
Altitude
-T/A =o 1A /"ACMCDDDDDDBBBB
$"F/ to G))F/
3). ft
M06T*, anel mounted7 no shoc< mountingre&uired
*E ++#)+#2 mm
HE*,4T 8.82 >!oogr.@
e#cluding e#ternal connectors andharness.
ower -e&uirements
/0MM -eceive
/0MM Transmit >Tone@
/4-*ITA /0T-0E=
%-E;6E/I -A,E
%-E;6E/I TAB**TI
13.+) ( >or 2+.) ( with 281"@
o1. J ." amps
1." amps > o.8 amps unmodulated @
+2 channels
118. to 13).!+) M4: with 2)
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headphones
=ut' /'cle ) minutes on7 ) minutes off > ) K @
ATR 720 Re%ei*er
Spe%i/i%ation C8ara%teristi%s
ensitivit' 1.) ?( will provide a dB minimum signalplus noise to noise ratio
electivit' T'pical dB at 8
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.+ 4nits and A%%essories S"pplied
AT- +2 /0MM
AT- +2 / installation
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2 SECTION II Installation and Operation
2. &eneral
This section contains suggestion and factors to consider 9efore installing the AT- +2/0MM unit and 281" (oltage /onverter >2+.) ( installations onl' @. /lose adherence tothese suggestions will assure a more satisfactor' performance from the e&uipment.
2.2 4npa%kin and Inspe%tin
E#ercise e#treme care when unpac
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2.2. Ele%tri%al ;en%8 Test
Test E&uipment -ecommended
1. (4% ignal ,enerator 4 Model 8= or e&uivalent.2. -% ower Hattmeter Bird Truline Model "3 or e&uivalent.3. -egulated =/ uppl' with 12 to 1) (d# at 2 amperes capa9ilit'.". %re&uenc' /ounter 4 Model )383 A or e&uivalent.). 0scilloscope ational ( ))1 A or e&uivalent pea
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6sing a car9on standard microphone or a d'namic microphone with preamplifier turn themicrophone gain trim$potentiometer - 31" full
- counter cloc
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2. ATR 720 INSTAATION
isted 9elow are factors and suggestions to consider 9efore installing jour AT- +2 / s'stem. /lose adherence to these suggestions will assure more satisfactor' performance fromjour e&uipment.
1. The AT- +2 / is mounted rigid in the aircraft panel. =etermine that the location andinstallation of radio e&uipment provides sufficient visi9ilit' and handling of the controlsfor the pilot in his normal position. Mar< and cut the mounting holes as shown in %igure 2$3. The purpose of the 9ehind aircraft mount cutout is to allow a margin of errorin cutout si:e and prevent the mounting tra' front edge from 9eing visi9le. The mounting tra' lip should e#tend through the mounting hole flush with the instrument panel toinsure proper plug in engagement.
2.Avoid mounting close to an' high e#ternal heat source. *f this is done7 no 9lower orram air cooling will 9e re&uired.
3.-emem9er to allow ade&uate space for installation of ca9les and connectors.
".ecure the mounting rac< to instrument panel per %igure 2$3. The rearward mountingholes must 9e attached to a structural mem9er of the panel 9' means of support9rac
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2.%a9ricate the e#ternal ca9les in accordance with the installation drawing that fulfills thes'stem re&uirement.
0 T E J
6se good &ualit' stranded wire that will not support a flame and with al least voltinsulation. *t is recommended that the mi
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%*,6-E 2$.1 *TE-/0E/T*0 =*A,-AM
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2.7 O5ERATION
2.7. &eneral
All controls re&uired to operate the AT- +2 / are located on the front panel.
2.7.2 ATR 720 C CO11 1"lti/"n%tion Control
2.7.2. Co'' ? On#O//S(it%81"lti/"n%tion Control
The multifunction$ 0C0%%$switch is located in the upper -ight$hand corner. The transceiveris activated the switch is turned cloc
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2.7.2., Fre9"en%> 3ispla>
The fre&uenc' is displa'ed + mmPs high on a )$digit li&uid$cr'stal displa'.
2.7. 5OST INSTAATION CHEC@O4T
An operational performance flight test is recommended after the installation is completed toinsure satisfactor' performance of the e&uipment in its normal environment.To chec< the communications transceiver7 maintain an appropriate altitude and contact aground station facilit' at a rang of at least fift' nautical miles. /ontact a ground station close
in. lace the s&uelch