icom Communications Receiver IC-R8500

iC-r8500COMMUNICATIONS RECEIVER

INSTRUCTION MANUAL

Versions of the IC-R8500 which display the CEsymbol on the serial number seal, comply withthe essential requirements of the European

Radio and Telecommunication Terminal Directive1999/5/EC, and that any applicable Essential Test Suitemeasurements have been performed.

UNPACKING

PRECAUTIONS

IMPORTANTREAD THIS INSTRUCTION MANUALCAREFULLY before attempting to operate thereceiver.

SAVE THIS INSTRUCTION MANUAL. Thisinstruction manual contains important safety and oper-ating instructions for the IC-R8500.

EXPLICIT DEFINITIONS

RINDOOR USE ONLY! NEVER expose theIC-R8500 or AC adapter to rain, snow or any liquids.

RNEVER connect the receiver to an AC outletdirectly. This may pose a fire hazard or result in anelectric shock. Always use the supplied AC adapter orconnect to a 13.8 V DC power source.

RNEVER connect to an AC outlet that exceeds thesuggested voltage for each AC adapter version. Thiscould cause a fire or ruin the AC adapter and/orreceiver.

RNEVER use non-rated fuses. Non-rated fusescould cause a fire or ruin the receiver.

NEVER let metal, wire or other objects touch anyinternal part or connectors on the rear panel of thereceiver. This will cause electric shock.

AVOID using or placing the receiver in areas with tem-peratures below 10C (+14F) or above +50C(+122F).AVOID placing the receiver in excessively dusty envi-ronments or in direct sunlight.

AVOID placing the receiver against walls or puttinganything on top of the receiver. This will obstruct heatdissipation.

RESPECT other peoples privacy. Information over-heard but not intended for you cannot lawfully be usedin any way.

i

Accessories included with the IC-R8500:Qty.

qAC adapter (AD-55A)* ........................................... 1wDC power cable (OPC-023C) ................................ 1eMini plug (2-conductor, 3.5d) ................................. 1rPhono (RCA) plugs ............................................... 2tFuse (FGMB 125 V 3 A; internal use) ................... 1yFuses (FGB 3 A; for DC cable) ............................. 2uScrews (M4 12 for optional MB-23) ..................... 2iScrews (C0 3 8 for optional MB-23 feet) ............. 4oAllen bolts (M5 8 for optional IC-MB12) .............. 4*Some versions are not supplied with an AC adapter.

q

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e r t y u i

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WORD DEFINITION

RWARNINGPersonal injury, fire hazard or electricshock may occur.

CAUTION Equipment damage may occur.

NOTE If disregarded, inconvenience only. No riskof personal injury, fire or electric shock.

TABLE OF CONTENTSIMPORTANT ............................................................. iEXPLICIT DEFINITIONS .......................................... iPRECAUTIONS ........................................................ iUNPACKING ............................................................. iTABLE OF CONTENTS ............................................ ii

1 PANEL DESCRIPTION ..................................... 16Front panel ................................................................... 1Rear panel ................................................................... 5Function display ........................................................... 6

2 CONNECTIONS .............................................. 710Mounting installation .................................................... 7Required connections .................................................. 8Antenna connection ..................................................... 9Grounding .................................................................... 9Tape recorder connections ........................................ 10Transceive function .................................................... 10Connecting to a PC ................................................... 10Data demodulation terminal ....................................... 10

3 FREQUENCY SETTING ................................ 1112Read me first .............................................................. 11Using the keypad ....................................................... 11Using the main dial .................................................... 12Lock function .............................................................. 12

4 RECEIVE FUNCTIONS ................................. 1316 Initial settings ............................................................. 13Mode selection ........................................................... 13Squelch function ........................................................ 14Functions for FM ........................................................ 14Functions for SSB/CW ............................................... 14Data communications ................................................. 16

5 MEMORY CHANNELS .................................. 1722General ...................................................................... 17Bank selection ........................................................... 17Channel selection ...................................................... 18Programming ............................................................. 19Copy and paste (memory editing) .............................. 19Clearing ..................................................................... 19Channel/bank names ................................................. 20Assigning channels numbers ..................................... 21

6 SCANS .......................................................... 2328Operation ................................................................... 23Mode select function .................................................. 25Specifying skip channel and frequency ..................... 25Automatic bank limit/skip functions ............................ 26Voice scan control function ........................................ 26Programming scan edge frequencies ........................ 27Scan speed/delay functions ....................................... 27

7 SLEEP TIMER ..................................................... 29

8 SET MODE .......................................................... 30General ...................................................................... 30Quick set mode items ................................................ 31 Initial set mode items ................................................. 31

9 CONNECTOR INFORMATION ...................... 3334

10 CONTROL COMMANDS ............................ 3536Command table ......................................................... 35Data format ................................................................ 35

11 MAINTENANCE ................................................. 37Disassembly .............................................................. 37Fuse replacement ...................................................... 37Level adjustments ...................................................... 37Memory backup ......................................................... 37CPU resetting ............................................................ 37Cleaning ..................................................................... 37

12 OPTIONAL INSTALLATIONS ..................... 38 39UT-102 VOICE SYNTHESIZER UNIT ................................ 38FL-52A CW NARROW FILTER ........................................ 38CR-293 HIGH STABILITY CRYSTAL UNIT ......................... 39

13 TROUBLESHOOTING ................................. 4041

14 SPECIFICATIONS ............................................. 42

15 OPTIONS ........................................................... 43

16 DOC ................................................................... 44

ii

qPOWER SWITCH [POWER]Turns power ON and OFF.

wSLEEP/SET SWITCH [SLEEP/SET]Push momentarily to set the sleep timer (p. 29).

Selectable times are 30, 60, 90, 120 min. or OFF. appears in the function display when thesleep timer is set.

Push for 1 sec. to enter quick set mode (p. 30).Use the [M-CH] selector and main dial to select itemsand contents, respectively.

eRECORDER REMOTE JACK [REC REMOTE] (p. 10)Controls the running of a tape recorder for record-ing. Connects to the REMOTE jack on a taperecorder.

rRECORDER JACK [REC OUT] (p. 10)Outputs an audio signal. Connect to the AUX orLINE IN jack on a tape recorder.

tHEADPHONE JACK [PHONES]Accepts headphones with 416 impedance.When headphones are connected, no receive audio comesfrom the speaker.

Stereo headphones can be connected, however, outputis monaural.

yMODE SWITCHES [WFM]/[FM]/[AM]/[SSB/CW](p. 13)Push to select an operating mode.

The following keys toggle between several modes:[FM] ................. FM, FM narrow[AM] .................AM, AM narrow, AM wide[SSB/CW] ........USB, LSB, CW, optional CW narrow

When SSB/CW mode is selected, push [SSB/CW]for 1 sec. to adjust the BFO frequency. (p. 15).

uNOISE BLANKER/AFC SWITCH [NB]/[AFC]Activates the noise blanker function or automatic fre-quency control function.The noise blanker is used for removing pulse-type noisewhen SSB, CW or AM mode is selected (p. 15).

The automatic frequency control tunes the displayed fre-quency automatically when an off-center frequency is re-ceived. It activates when FM or WFM is selected (p. 14).

iAUDIO FREQUENCY GAIN CONTROL[AF GAIN] (p. 13)Rotate clockwise to increase the audio output; rotatecounterclockwise to decrease the audio output.

oAUTOMATIC GAIN CONTROL [AGC] (p. 15)Toggles the time constant of the AGC circuit be-tween slow and fast.When fast is selected, AGC-F appears.Cannot be used in FM or WFM modes.

!0SQUELCH CONTROL [SQUELCH] (p. 14)Varies the squelch threshold level (to mute noisewhen receiving no signal).

!1 IF SHIFT CONTROL [IF SHIFT] (p. 14)Shifts the center frequency of the receivers IF pass-band to reject interfering signals.Cannot be used in FM, WFM and AM modes.

1

1 PANEL DESCRIPTION

MODE

WFM

NB/AFC AGC 10dB 20dB

FM AM

APF

TS

TS

SPCH

SSB/CW

AF GAIN SQUELCHPHONES

REC OUT

SLEEP/

RECREMOTE

IF SHIFTAPF

SET

LOCK

COMMUNICATION RECEIVERiC-r8500

POWER

SIGNAL

S 1 3 5 7 9 +20dB+60dB

@0

q

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t

y i o !0 !1 !2 !3 !4u

FM

RECVBANK

10-ATT-20APF-NAGC-FAFCNB

SLEEP

LOCK

ICOM

S-meter squelchthreshold

Noise squelchthreshold (notavailable in SSB,CW, WFM andAM narrow modes)

Signals below the S-meter level are muted.

Front panel

21PANEL DESCRIPTION

!2AUDIO PEAK FILTER CONTROL [APF] (p. 15)Adjusts the audio peak filter setting to pick up a de-sired audio frequency. Only valid when the [APF]switch is ON.Clockwise rotation adjusts the filter setting higher; coun-terclockwise rotation adjusts the filter setting lower.

!3ATTENUATOR SWITCHES [10dB]/[20dB]Push to activate one of the attenuators.Push [10dB] to activate the 10 dB attenuator. Push [20dB] to activate the 20 dB attenuator. Push [10dB]+ [20dB] to activate the 30 dB attenuator.10 dB and 30 dB attenuator cannot be used below 500 kHz.

!4AUDIO PEAK FILTER SWITCH [APF] (p. 15)Push momentarily to toggle the audio peak filter

circuit ON and OFF.Use the [APF] control to adjust the center of the audiopeak passband.

When the audio peak filter circuit is ON, push for1 sec. to toggle the filter setting between normaland narrow. Narrow is available for SSB, CW and AM only.

!5SPEECH/LOCK SWITCH [SPCH/LOCK]Push momentarily to activate the voice synthesiz-

er function and have the displayed frequencyannounced.An optional UT-102 SPEECH SYNTHESIZER UNIT is nec-essary to activate the voice synthesizer function (p.38).

Automatic announcement at signal detection duringscan is available. Refer to the REC SPCH item onp. 31 for details.

Push for 1 sec. to activate the lock function (p.12).Push for 1 sec. again to cancel the lock function.The lock function action can be selected in set modeto cover the main dial only, or to cover both the maindial and front panel switches.

!6TUNING STEP SWITCHES [TS]/[TS] (p. 12)Select the tuning step for the main dial. Push [TS]to select a larger tuning step; push [TS] to selecta smaller tuning step.10 Hz, 50 Hz, 100 Hz, 1 kHz, 2.5 kHz, 5 kHz, 9 kHz, 10kHz, 12.5 kHz, 20 kHz, 25 kHz, 100 kHz and 1 MHz areselectable.

Programmable tuning steps can be set between 0.5 and199.5 kHz.To set programmable tuning steps, enter the desired

steps via the keypad, then push [TSY]or [TSZ].!7MAIN DIAL

Changes the operating frequency, set mode contents,etc.

!8BRAKE ADJUSTMENT SCREWAdjusts the main dial tension.

!9FUNCTION DISPLAY (p. 6)Shows the selected frequency, mode, memoryname, etc.

@0S-METERShows the strength of the received signal.Shows the squelch threshold level when the

[SQUELCH] is rotated past the center position.

MEMO

SEL SKIP VSC DLY

SCAN/

NAME

SCAN SET

PROG AUTO PRIO

M-SET BANK

M-CL MW

DELAY/SPEEDM-CH

D/S

1 QZ

GHI

PRS TUV WXY

ENT

BANK

BANKJKL MNO

ABC DEF. ; ,

4

7 8

0 CEENT

M-CH

.

9

5 6

2 3

!9

!5 !6 !8!7

SEL-CH SKIP-CH

OFF

kHz

DLY

MIC-R8500

Center frequency is shifted up.

Center frequency is shifted down.

@1MEMORY SET SWITCH [M-SET] (p. 19)Used to copy and paste the displayed frequencyinto another memory channel.The first push is used to copy ( appears), and the sec-ond push is used to paste ( disappears).

Frequency, mode, tuning step, memory name, etc. canbe programmed into a temporary memory.

@2MEMORY CLEAR SWITCH [M-CL] (p. 19)Push and hold to clear the contents of the displayedmemory.Bank names cannot be cleared.

@3MEMORY WRITE SWITCH [MW] (p. 19)Push and hold to store the displayed frequency,mode, tuning step, etc. into the selected memorychannel.

@4BANK SWITCH [BANK] (p. 17)Push momentarily to toggle the bank limit func-

tion ON and OFF (p.18).While BANK appears, only memory channels withinthe selected bank can be selected via the [M-CH] se-lector.

Push for 1 sec. to increase/decrease the number ofmemory channels in the selected bank (p. 21).

@5MEMORY CHANNEL SELECTOR [M-CH] (p. 18)Selects a memory channel in normal use.

Clockwise rotation selects higher memory channelnumbers; counterclockwise rotation selects lowermemory channel numbers.

Selects a set mode item when quick set mode orinitial set mode is selected (p.30).

@6DELAY/SPEED CONTROL [DELAY/SPEED] (p. 28)Adjusts the scan delay time or scan speed depend-ing on the [DLY ] switch setting.

When scan delay time is assigned, this control adjuststhe scan delay time (scan pausing interval) during signalreception. This setting is effective when isselected for the scan resume condition.

When scan speed is assigned, this control adjusts thescan speed. In this case, scan delay time is determinedwhile setting.

@7SCAN SWITCHES [SCAN ]All of these switches are related to the scan functionin some way as follows:[MEMO] (p. 23)Push momentarily to start/stop memory scan.Push numeral keys, then this key to start memo-

ry scan in the specified bank.Push this key, then a mode switch to activate

mode select scan function.Push for 1 sec. to set automatic bank and skip

functions.The bank limit function and/or memory skip functionsare activated automatically when AUTO is selectedand scan is started.

[SEL] (p. 23)Push momentarily to start/stop memory select

scan.Push for 1 sec. to set the memory channel as a

select channel.[PROG] (p. 24)Push momentarily to start/stop programmed scan.Push numeral keys, before or after pushing this

key to start programmed scan using the specifiedscan edge group.10 scan edge groups are available.

Push for 1 sec. to program scan edges for pro-grammed scan.

MM

3

1 PANEL DESCRIPTION

MODE

WFM

NB/AFC AGC 10dB 20dB

FM AM

APF

TS

TS

SPCH

SSB/CW

AF GAIN SQUELCHPHONES

REC OUT

SLEEP/

RECREMOTE

IF SHIFTAPC

SET

LOCK

COMMUNICATION RECEIVERiC-r8500

POWER

SIGNAL

S 1 3 5 7 9 +20dB+60dB FM

RECVBANK


SLEEP

LOCK

ICOM

41PANEL DESCRIPTION

[SKIP] (p. 25)Push momentarily to toggle the skip function ON

and OFF for any scan.Automatic skip activation is available with the [MEMO]switch.

Push for 1 sec. to set the memory channel as a skipchannel.

[AUTO] (p. 24)Push momentarily to start/stop auto write scan.Push for 1 sec. to select the written memories

condition for the auto write scan.Two conditions are available, clear auto-written mem-ories before scan starts; and, keep auto written mem-ories before scan start.

[VSC] (p. 26)Push to toggle the voice scan control function ONand OFF.The VSC function resumes the scan when a detected sig-nal does not contain voice components.

VSC appears while the voice scan control function isactivated.

[PRIO] (p. 25)Push momentarily to start/stop priority scan.

Priority scan can be used in combination with otherscans.

Push for 1 sec. to enter the priority channel pro-gramming condition.

[DLY ] (p. 27)Push momentarily to select a scan resume condi-

tion. OFF is underscored: scan pauses on a signal until it

disappears, then resumes 3 sec. after that. DLY is underscored: scan resumes according to the

[DELAY/SPEED] control setting. When a signal dis-appears, scan resumes 3 sec. later.

is underscored: scan is cancelled when receivinga signal.

Push for 1 sec. to enter the delay time/scan speedsetting condition.The function of the [DELAY/SPEED] control can be se-lected.

@8KEYPADThe keypad can be used for several functions as below:Keypad then [ENT] (then [MW])Direct frequency input.

Keypad then [M-CH]Memory channel selection.

[CE NAME] then keypadAlphanumeric input for memory, bank names, etc.

Keypad then [TSY] or [TSZ]Arbitrary tuning step setting.

Keypad then [MEMO] or [SEL]Specify memory bank then start memory scan or se-

lect memory scan.Keypad then [PROG] or [AUTO]Specify scan edge group, then start programmed

scan or auto write scan.

MEMO

SEL SKIP VSC DLY

SCAN/

NAME

SCAN SET

PROG AUTO PRIO

M-SET BANK

M-CL MW

DELAY/SPEEDM-CH

D/S

1 QZ

GHI

PRS TUV WXY

ENT

BANK

BANKJKL MNO

ABC DEF. ; ,

4

7 8

0 CEENT

M-CH

.

9

5 6

2 3

@2 @3@1 @4 @5 @6

@7

@8SEL-CH SKIP-CH

OFF

kHz

DLY

MIC-R8500

51 PANEL DESCRIPTION

Rear panel

qRS-232C CONNECTOR (p. 10)Connects an RS-232C cable. An RS-232C cablecan be used to connect the IC-R8500 to a PC. In thisway commands can be sent to the receiver via thePC.

wCI-V REMOTE CONTROL JACK (p. 10)Allows connection to an Icom CI-V system trans-ceiver or another receiver for the transceive function.Also connects to a PC with several receivers forcommand control via an optional CT-17 CI-V LEVELCONVERTER.

e IF OUT JACK Outputs a 10.7 MHz IF signal with 9 V DC for an ex-ternal equipment.

rAGC JACK (p. 16)This jack has functions which are selectable throughinternal receiver settings.Outputs an AGC signal for an external equipment (de-fault).

Outputs audio detected signal without de-emphasis for9600 bps data detection (FM mode only).

tDC 13.8 V JACK (p. 8)Plug in the jumper connector here when using the

supplied* AC adapter.Connects to a 13.8 V DC power source using the

supplied DC cable when the AC adapter is notconnected.*Not supplied with some versions.

yEXTERNAL SPEAKER JACKConnects an 8 external speaker.When an external speaker is connected, the internalspeaker does not function.

uDC IN JACK (p. 8)Connects the supplied* AC adapter.A regulator circuit has been designed between this con-nector and the DC 13.8 V jack.

Be sure the jumper connector is connected to the DC13.8 V jack.

*Not supplied with some versions.

iHF 50 ANTENNA CONNECTOR (p. 8)Connects an antenna to cover the frequency rangebelow 30 MHz.Use a coaxial cable and a PL-259 connector.Be sure this connector is selected in quick set mode(p. 31).

oGROUND TERMINAL (p. 9)Connect this terminal to a ground.

!0HF 500 ANTENNA CONNECTOR (p. 8)When a 500 long wire antenna is used for HF bandreceiving, this connector is used instead of the 50 antenna connector.Set the HF ANT item to 500 to use this connector(p. 31).

!1VHF/UHF ANTENNA CONNECTOR (p. 8)Connects an antenna to cover the frequency rangeover 30 MHz.Use a coaxial cable and type-N connector.

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!0!1

61PANEL DESCRIPTION

Function display

qREMOTE INDICATOR (p. 35)Appears when a level control command is received from aPC via CI-V data.When this indicator appears, the control knobs setting isignored.

This indicator will disappear when the control knob is rotated.

wMODE INDICATORS (p. 13)Show the operating mode.

eFREQUENCY READOUTShows the operating frequency.

rSKIP INDICATOR (p. 25)Appears when the skip function is activated.Flashes during scan when the skip function is ac-

tivated by the auto skip function.

tVSC INDICATOR (p. 26)Appears when the voice scan control function isactivated.

ySCAN RESUME CONDITION INDICATORS (p. 27)Show the selected scan resume condition.

uTUNING STEP INDICATORS (p. 12)Show the selected tuning step. appears when a programmable tuning step is selected.

iTEMPORARY MEMORY INDICATOR (p. 19)Appears when [M-SET] is pushed to indicate that

a frequency is being temporarily saved.Disappears when the temporary memory is past-

ed into another memory channel.

oMEMORY CHANNEL READOUT (p. 17)Shows the selected memory channel number.

!0SKIP CHANNEL INDICATOR (p. 25)Appears when the selected memory channel is setas a skip channel.

!1MEMORY NAME INDICATORS (p. 20)Display names programmed into a memory, or scangroup.

!2SELECT CHANNEL INDICATOR (p. 23)Appears when the selected memory channel is setas a select channel.

!3BANK NUMBER INDICATOR (p. 17)Shows the selected memory bank number.

!4BANK INDICATOR (p. 18)Appears when the bank limit function is activated.Flashes during scan when the bank limit function

is activated by the auto bank function.

!5BANK NAME INDICATOR (p. 20)Displays names programmed into a bank.

!6AUDIO PEAK FILTER INDICATOR (p. 15)APF or APF-N appears when the audio peak fil-ter function is activated.

!7ATTENUATOR INDICATORSAppear when the RF attenuator is activated.

!8AUTOMATIC GAIN CONTROL INDICATOR (p. 15)AGC-F appears when AGC fast is selected; no indi-cation appears when AGC slow is selected.

!9RECEIVE INDICATORAppears while receiving.

@0FM CENTER INDICATORS (p. 14)Appear when the received signal is not tuned to itscenter frequency.

@1NOISE BLANKER INDICATOR (p. 15)Appears when the noise blanker circuit is activated.

@2AFC INDICATOR (p. 14)Appears when the automatic frequency controlfunction is activated in either FM or WFM modes.

@3LOCK INDICATOR (p. 12)Appears when the main dial or front panel switchesare locked.

@4SLEEP INDICATOR (p. 29)Appears when the sleep timer is set.

P

REMOTE WFM

RECV

AMUSBLSBCW

BANK10-ATT-20

APF-NAGC-FAFCNB SEL-CH SKIP-CH

WIDE NAR SKIP VSC OFF

MHz kHz

DLY

SLEEP

LOCK

M

P

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@1

@2

@3

@4

72 CONNECTIONSMounting installation

DLocationSelect a location for the receiver that allows adequateair circulation and access to the front and rear panels.Do not place in areas subject to extreme heat, cold, orvibrations, or near TV sets, radios and electromagneticsources.

Be careful of the internal temperature of the receiver.Installation into a rack or other enclosed area may in-crease the internal temperature over the useable tem-perature range. Specifications are not guaranteedunder such conditions.

DReceiver standThe base of the IC-R8500 has an adjustable stand fordesktop use. Set the stand to one of two angles de-pending on your operating conditions.

DOptional bracket and carrying handleMounting bracketAn optional mounting bracket is available to install theradio under a table, on a wall, in a vehicle, etc.Select an area to mount the receiver keeping in mindthat the weight of the IC-R8500 is approx. 7 kg.

Carrying handleAn optional handle allows you to easily carry andtransport the receiver.Attach the MB-23 CARRYING HANDLE with the suppliedrubber feet as shown.

CAUTION: The screws supplied with the MB-23cannot be used with the IC-R8500. Use the screwssupplied with the IC-R8500 when attaching theMB-23.

Flat washer

Springwasher

Allen boltsupplied withthe IC-R8500.

82CONNECTIONS

Required connections

IC-R8500

Supplied DC power cable

Unplug the jumper plugfrom the [DC13.8V] jack.

AC adapter AD-55/A/V

Connecteither powersource

The jumper plug must beconnected to the [DC 13.8V]jack.

Ground connection (p. 9)

HF antennaLong wire antennaVHF/UHF wide bandantenna

Computer control(p. 10)

External speaker(p. 43)

High speed data connection (p. 16)

0.130 MHz coverage0.130 MHz coverage30 MHz 2 GHz coverage

The optional AH-7000 is available for 25 MHz to 1.3 GHz coverage.

Select the active antenna connector in quick set mode (p. 31)

92 CONNECTIONS

Antenna connectionAntennas play a very important role in receiver opera-tion. Connecting a poor quality antenna to theIC-R8500 will result in less than optimum performance.

The IC-R8500 requires at least 2 antennas for full fre-quency coverage: one for 0.1 to 30 MHz and one for30 to 2000 MHz.

DUsing a long wire antenna for HF bandsThe IC-R8500 has a 500 phono (RCA) antennaconnector for the HF bands. When using a long wireantenna, instead of a 50 matched antenna, use oneas long as possible (at least 10 m, 33 ft) and select theactive connector as follows:

qPush [SLEEP/ ] for 1 sec. to enter quick setmode.

wRotate the [M-CH] selector to select the HF ANTitem.

eRotate the main dial to select the antenna connector.rPush [SLEEP/ ] momentarily to exit quick set

mode.

Grounding

To prevent accidents involving electricity and interfer-ence from transceivers, ground the receiver throughthe [GND] terminal on the rear panel.For best results, connect a heavy gauge cable to awater pipe or long, earth-sunk copper rod. Make thedistance between the [GND] terminal and ground asshort as possible.

RWARNING: NEVER use a gas pipe or electri-cal conduit pipe for grounding.

30 mm

10 mm (soft solder)

10 mm

12 mm

solder solder

Softsolder

Coupling ring

PL-259 CONNECTOR INSTALLATION EXAMPLE

q e

rw

Slide the coupling ring down. Strip the cable jacket and soft solder.

Slide the connector body on and solder it.

Screw the coupling ring onto the connector body.

Strip the cable as shown at left. Soft solder the center con-ductor.

(10 mm 38 in)

15 mm

Clamp

3 mm 6 mm

Center conductor

Washer

Nut Rubber gasket

TYPE-N CONNECTOR INSTALLATION EXAMPLE

q e

r

w

Slide the nut, washer, rubber gasket and clamp over the coaxial cable, then cut the end of the cable evenly.

Soft solder the center conductor. Install the center conductor pin and solder it.

Carefully slide the plug body into place aligning the center conductor pin on the cable. Tighten the nut onto the plug body. Be sure the center

conductor is the same height as the plug body.

Strip the cable and fold the braid back over the clamp.

(10 mm 38 in)

Plug body

No space

Solder hole

500 HF ANT

10

2CONNECTIONS

Tape recorder connectionsThe [REC OUT] jack has 350 mV rms/4.7 k outputfor connection to other audio equipment.

Transceive functionIcom CI-V transceivers or receivers can be connect-ed via the [REMOTE] jack. The frequency and modebecome the same* when either radio is changed.

*When a set frequency is out-of-range for one of the con-nected transceivers or receivers, the connected radiosfrequency/mode does not change.

Connecting to a PC

Data demodulation terminalSee p. 16 for details regarding connection and opera-tion.

The IC-R8500 can connect directly to a personalcomputer providing control of multiple functions suchas instant frequency/name programming usingappropriate software. See pgs. 35, 36 for the controlcommand table.

Personal computer

IC-R8500

RS-232Ccable

13

25 14

2.RXD (data input)3.TXD (data output)1

20 6

8

IC-R8500

SCAN SET

[RECREMOTE]

[REC OUT]350 mVrms4.7 k

[AUX IN] or[LIVE IN] jack

Convenient:When an optional UT-102 VOICE SYNTHESIZER UNIT isinstalled, detected frequencies during scanning canbe recorded. See pgs. 31, 32 for settings.

[REC REMOTE] jack:Grounds when a signal isreceived and squelch opens. If a tape recorder hasa control terminal, this jack can be used for record-ing control. (2 A/DC max.)

Connect to [REMOTE] jack

Be sure the CIV TRAN item is turned ON in initial set mode (p. 32).

A DB9/DB25 adapter may berequired depending on the PCsconnector.

11

3 FREQUENCY SETTINGRead me firstThe IC-R8500 uses memory channels for storage offrequencies (as well as mode, tuning steps, etc.).When turning power OFF or changing memory chan-nels, the previously displayed frequency cannot berecalled unless it has been stored into a memorychannel. Therefore, when you want to keep a dis-played frequency for later recall, you must program itinto a memory channel by pushing [MW] for 1 sec.

Convenient:Use [M-SET] to program a displayed frequency (andits mode, etc.) without overwriting the currently select-ed memory. See p. 19.

Using the keypadqPush the numeral keys on the keypad to enter the

MHz digits for the desired frequency. If a key is mistakenly pushed, push [CE] and startagain from the beginning.

When entering the same MHz digits as the displayedfrequency, this step can be skipped.

wPush [ ].

ePush the numeral keys to enter the frequency digitsbelow 1 MHz. If a key is mistakenly pushed, push [CE] and startagain from the beginning.

rPush [ENT] to set the input frequency.When pushing [ENT] after entering the MHz digits, zerosare automatically entered for the kHz digits.

[EXAMPLE]: SETTING THE FREQUENCY USING THE KEYPAD

To set to 145.00 MHz 1 4 5 ENT

To set to 1296.040 MHz 1 2 9 6 0 4 ENT

To set to 850 kHz (0.85 MHz) 0 8 5

ENT

To change from 1296.040 to 1296.850 MHz 8 5

ENT

Push [MW] for 1 sec. after tuning.

FM OFF

kHz

DLY

USR-A BLANK

BLANK appears in the memory name area until[MW] is pushed for 1 sec.

12

3FREQUENCY SETTING

Using the main dialRotate the main dial to change the frequency.The frequency changes in increments determined by theselected tuning step (see below).

When the lock function is activated (LOCK appears) thefrequency cannot be changed.

DSelecting a tuning step13 preset tuning steps are available plus 1 programma-ble tuning step (see below). The preset tuning steps are:10 50 100 Hz1 2.5 5 9 10 12.5 20 25 100 kHz1 MHzPush [TSY] or [TSZ] to change the selected tuningstep.

DSetting the programmable tuning stepThe programmable tuning step can be set between therange of 0.5199.5 kHz (in 0.5 kHz steps) for eachmemory independently.qPush the numeral keys on the keypad that corre-

spond to the tuning step you wish to program.wPush [TSY] or [TSZ] to set the programmable tun-

ing step to the selected value.The programmable tuning step is automatically selectedas the active tuning step.

Lock functionThe lock function electronically locks the indicated fre-quency from accidentally being changed.Push [SPCH ] for 1 sec. to toggle the lock func-tion ON and OFF. LOCK appears in the function display while the lockfunction is activated.

DSetting the lock function coverageThe lock function can be set to lock the main dial onlyor, the main dial and most of the front panel switches.qPush [SLEEP ] for 1 sec. to enter quick set

mode.wRotate the [M-CH] selector to select the LOCK

indication.eRotate the main dial to set the lock function cover-

age to DIAL or PANEL.rPush [SLEEP ] momentarily to exit quick set

mode.

SCAN SET

[TSY][TSZ]

MHz kHz

PTuning stepindicators

MHz kHz

P appears when the programmable tuning stepis selected.or appears to indicate the units of

the selected tuning step.

[EXAMPLE]: Setting the programmable tuning step to 50 kHz.

(or )

kHz

P

kHzkHz

5 0 TS TS

FM

kHzLOCK

*ICOM IC-R8500

OFF DLY

LOCK DIAL

kHz

FM OFF DLY

13

4 RECEIVE FUNCTIONS Initial settings

Mode selectionPush one of the mode keys one or more times toselect the desired mode. Consult the table below forbasic characteristics of each mode.

The indications in the table appear in the bank namearea for 1 sec. after an operating mode is selected.

SCAN SET

FM

RECVBANK


OFF

kHz

DLY

SLEEP

LOCK

*ICOM IC-R8500

[AF GAIN]: 10 oclock

[APF]: center[IF SHIFT]: center

Push [SLEEP]

Push [NB/AFC]

Push [AGC] Push [10dB] and/or [20 dB]

Push and hold[SPCH LOCK]

Before turning power ON, set controls and switches as indicated below:

After turning power ON,check the display for indications below and remove as follows:

[SQUELCH]: max. CCW

MODE BANDWIDTH INDICATION DESCRIPTION

FM12 kHz/6 dB Amateur bands, citizens band, utility communications, marine bands,

etc. FM-narrow can only receive narrow FM signals; normal FM canreceive both normal and narrow FM signals.

AM

5.5 kHz/6 dBBroadcasting, amateur bands, citizens band, air band, etc. AM-widemode is used for clear audio reception. Signals however, may bereceived with interference.

SSB 2.2 kHz/6 dB Shortwave broadcasting, amateur bands, etc. Use USB for normalSSB reception; LSB is not normally used.

CW2.2 kHz/6 dB Morse code communications. Use this mode to receive radio-tele-

type, etc. by shifting the receive frequency.

WFM 150 kHz/6 dB TV broadcasting, FM broadcasting, etc. TV and FM broadcastingcannot be accessed in FM mode because their signals are too wide.

5.5 kHz/6 dB

normal

narrow

2.2 kHz/6 dB

medium

narrow

12 kHz/6 dBwide

USB

LSB

normal

500 Hz/6 dBnarrow(option)

The IC-R8500 has 2 types of squelch, noise squelchand S-meter squelch.Noise squelch: Only acts on noise; has good sensi-tivity. It can be adjusted for reception of weak signals.Strong signals exceeding a certain level will alwayscause the squelch to open.S-meter squelch: S-meter squelch does not open forweak signals but can be adjusted to open for signalsover a wide range of strengths. Once you haveselected a threshold point in a range, the IC-R8500will open for all signals above this point.To adjust the squelch, rotate [SQUELCH].Clockwise rotation closes the squelch (sets the thresholdpoint higher); counterclockwise rotation opens thesquelch (for reception of weak signals).

FM signals have a wide bandwidth which makes themeasy to receive. However, you may be tuned off-cen-ter resulting in audio distortion. The IC-R8500s off-center indicators appear in such cases, making iteasy to fine tune to the center of the frequency.

AFC stands for automatic frequency control. The AFCcircuit automatically compensates the tuning when areceive frequency drifts or goes off frequency.When one of the off-center indicators appears, theIC-R8500 can adjust the receive frequency automat-icallywhen the AFC function is turned ON and anoff-center frequency is received, the frequency in thedisplay automatically changes to reflect the center ofthe signal.

14

4RECEIVE FUNCTIONS

Squelch function

Functions for FMDCenter indicator

S-meter squelchthreshold

Noise squelchthreshold (notavailable in SSB,CW, WFM andAM narrow modes)

Signals below the S-meter level are muted.

When [SQUELCH] isrotated past center,the S-meter showsthe signal strengthneeded to open the squelch.

SIGNAL

S 1 3 5 7 9 +20dB +60dB

RECV

One of these indicators appears when the received signal is off-center.

RECV

When one of these indicators appears, the displayed frequency is automatically moved to the center frequency.

AFC

DAFC

The IF shift function electronically changes the cen-ter of the IF (intermediate frequency) passband fre-quency to reject interference. The IF shift is not avail-able in FM and AM modes.qAdjust the [SHIFT] control for a minimum interfer-

ence signal level.The audio tone may be changed while the IF shift is inuse.

wSet the shift control to its center position whenthere is no interference.

Functions for SSB/CWD IF shift

Shifts low Center Shifts high

IF SHIFTAPFIF SHIFTAPF IF SHIFTAPF

15

4 RECEIVE FUNCTIONS

The noise blanker reduces pulse-type noise such asthat generated by automobile ignition systems. Thisfunction is not effective for FM and WFM mode or fornon pulse-type noise and wide width pulses.Push [NB] to toggle the noise blanker ON and OFF. NB appears when the noise blanker is activated.

NOTE: When a strong signal is received while thenoise blanker is ON, the output audio may be dis-torted. In such cases, the noise blanker should beturned OFF.

The APF (audio peak filter) adjusts the peak fre-quency of the received audio. The APF can be usedfor adjusting the audio response. The IC-R8500 hastwo selectable width filters.* Use the appropriate filterwidth for optimum receiving.qPush the [APF] switch.wRotate the [APF] control to adjust the peak fre-

quency.eTo change the filter width*, push [APF] for 1 sec.

*Available for SSB, CW and AM only.

BFO stands for beat frequency oscillator. This func-tion is useful in conjunction with the IF shift function.When eliminating interference with the IF shift func-tion, the audio characteristics of the received signalare often changed. Use the BFO adjustment functionto adjust the audio quality of the received signal tothat desired.qPush [SSB/CW] to select SSB or CW mode.wPush [SSB/CW] for 1 sec. to activate the function.

BFO appears.eRotate [M-CH] to adjust the BFO.

1.2 kHz to +1.2 kHz are selectable.

AGC stands for automatic gain control. This functioncontrols receiver gain to produce a constant audiooutput level even when the received signal strengthis varied by fading, etc. Use AGC slow for normalphone operation; AGC fast for receiving data andsearching for signals. AGC time constant cannot bechanged in FM and WFM modes.Push [AGC] to toggle between AGC fast and slow.AGC-F appears when AGC fast is selected; no indi-cator appears when AGC slow is selected.

DNoise blanker

DAudio peak filter

DBFO adjustment

DAGC function

BFO 0.00kHz

ICOM-RECVAGC-F

NB OFF NB ON

500 1k 2k 5k [Hz]40

30

20

10

0

[dB]

500 1k 2k 5k [Hz]40

30

20

10

0

[dB]APF is selected APF-N is selected

[NB/AFC]switch

SCAN SET

[APF] control

[APF]switch SCAN SET

[SSB/CW]switch

SCAN SET

[M-CH]selector

[AGC]switch

SCAN SET

BFO shift can be set for USB,LSB and CW separately.

TU or TNC AF IN

SQUELCH IN

to [REC OUT]to [REC REMOTE]

SCAN SET

2-conductor 3.5(d) plugsPersonal computer

16

4RECEIVE FUNCTIONS

Data communicationsDConnections

DReceiving method

To use the [AGC] socket for AF outputChange the internal jumper plug as illustrated atright.The output is obtained for FM mode only.Usable for 9600 bps only.Refer to p. 37 for a description of opening the case.

qConnect a terminal unit as above.wSelect FM mode (or USB, CW modes for HF band

data communications).eSet the receiver to the desired frequency as below.rSet the connected terminal unit to the appropriate

settings.Refer to the terminal units instructions.

Rearpanel

TU or TNC

to [AGC]

RCA plugPersonal computer

[Audio IN] or[Detector IN]

For high speed data (9600 bps) reception in FM mode

For regular speed data (1200 bps or lower) reception in any mode

Frequency settings depend on the mode used.

FM mode: [Setting frequency(displayed freq.)]=[Desired freq.]USB mode: [Setting frequency(displayed freq.)]=[Desired freq.][Center of Mark and Space freq.]CW narrow mode: [Setting frequency(displayed freq.)]=[Desired freq.][Center of Mark and Space freq.]+ [600 Hz]LSB mode (for amateur RTTY): [Setting frequency(displayed freq.)]=[Desired freq.] + [Mark freq.]

AGC output(default)

AF direct detectoroutput200 mVrms/4.7 k

17

5 MEMORY CHANNELS

To select regular channel banks:Push [M-CH BANK] or [ENT BANK], one or moretimes to select the desired channel bank.The bank indicator shows the selected bank.Push and hold [BANK] or [BANK] to quickly cyclethrough the channel banks in the order to , FREE,AUTO and SKIP.

NOTE: The FREE bank is initially blank and there-fore cannot be selected. In order to select it at least1 channel must be programmed into the FREEbank. See p. 21.

Convenient: Bank namesThe default names of USR-A to USR-T can be setto your own preference. Refer to p. 20 for program-ming.

To select the programmed scan edge:Push [PROG] for 1 sec.PROG and channel number (0P1 to 9P2) appear.

Bank selection

The IC-R8500 has 1000 regular memory channels,plus 20 programmable scan edge channels and 1 pri-ority channel. 8-digit memory names are programmedinto all 1000 channels and 5-digit bank names areprogrammed into 20 user banks for convenient recalland organisation of frequencies. Moreover, memorychannels can store mode information, a tuning step,and ATT (attenuation) information.

NOTE: When memory channels without informa-tion (blank channels) are selected, the frequencyis not displayed. Only the memory channel num-ber appears.

The table below gives a general overview of theIC-R8500s memory channels.

BANK INITIAL CONTENTS USAGE

40 memories 20 banks

For normal use. Frequency, mode, tuning step, name and ATT information canbe programmed. The number of channels in each bank is user-assignable.Banks cannot be deleted (they must contain at least 1 channel).

100 memoriesFrequencies detected during auto memory write scan are memorised into thisbank in sequence. Mode and tuning step are written at the same time. Note thatwhen the written memories condition is set as CL&START and auto write scanis started, all memories in this bank are cleared.

100 memoriesUndesired signals such as from beacons, control-coded signals, etc., can be pro-grammed to be skipped during programmed scan and auto memory write scan.When [MW] is pushed for 1 sec. while scan is paused, the displayed frequencyis programmed into this bank regardless of the selected bank.

BlankFor temporary storage when assigning channels to banks. Deleted channels(contents have been cleared) are stored in this bank until being assigned toanother bank. This bank does not appear when no channel are assigned.

20 memories (fixed)Memorize scan edge frequencies. 10 pairs of scan edges (0P1 to 9P2) are pro-grammable (upper and lower scan edges). Mode and tuning step are automati-cally equalised to the last programmed channel in a pair.

General

ENT

BANK

BANK

. ; ,

ENT

M-CH

BANK

BANK

BANK

BANK

USR-A BLANK

BLANK

BLANK

BLANK

USR-B

BANKBLANKUSR-T

AUTO

BANKBLANKFREE

SKIP

*NONAME*PROG

AUTO

SKIP

FREE

PROG

18

5MEMORY CHANNELS

qSelect the desired bank using [M-CH BANK] or[ENT BANK].

wRotate the [M-CH] selector to select the desiredchannel.

Bank limit functionWhile rotating the [M-CH] selector, memory channelscan be selected from within the current bank only; orfrom any bank.Push [BANK] to toggle the bank limit function ON andOFF. Convenient: Automatic bank limit

When starting memory scan, the bank limit functionis activated automatically. This automatic selectioncan be deactivated. See p. 26.

Memory channels in the current bank can only beselected via the keypad.qSelect the desired bank using [M-CH BANK] or

[ENT BANK].wPush keys corresponding to the desired channel.ePush the [M-CH] key to set the selected memory

channel. Input for memory channels not available is cancelled.

Channel selectionDUsing the [M-CH] selector

DUsing the keypad

[M-CH] selector

[BANK ][BANK ]

[M-CH] key

[EXAMPLE]: Selecting channel 39 from within the currently selected bank

BANK

MUSR-A

BANK appearsBANK doesn'tappear

BANK

MUSR-A BANKSR-SR-

Bank limit OFFAll memory channels can beselected via the [M-CH]selector. [BANK]/[BANK]can be used.

Bank limit ONOnly memory channels inthe current bank can be se-lected. Banks can be se-lected with the[BANK]/[BANK] keysonly.

USR-A ABCD USR-A ABCD USR-A EFGH

WXY BANKDEF

. ; ,

M-CH93

[EXAMPLE]: Selecting channel 12 from a different bank (bank 3)

USR-A EFGH USR-D IJKL USR-D MNOP

BANK

. ; ,

M-CHBANK

. ; ,

M-CH1 QZ ABC2(3 times)

19

5 MEMORY CHANNELS

ProgrammingThis is the method most often used to program mem-ory channels.

qSelect the desired memory channel.wSet the desired frequency.

When the memory channel already contains information,change the frequency using the main dial or the keypad.

When the memory channel is blank, use keypad entryonly to set the frequency.

eSet operating mode (p. 13) and tuning steps (p. 12).rPush and hold [MW] until the receiver emits 3

beeps.The information is stored in the memory channel.

NOTE: When changing the memory channelbefore pushing [MW], the set frequency (andmode/tuning steps) is erased.

Copy and paste (memory editing)When the frequency (and mode/tuning steps) is setfor a channel; or, when you want to change a fre-quency using the contents of another memory chan-nel, the copy/paste function is helpful to keep (or con-firm) the previously programmed contents.qPush [M-SET] to temporarily store the displayed

frequency, mode, etc. M appears.Only 1 channel can be stored in the temporary space.

wSelect the memory channel you wish to programthe frequency into.

ePush [M-SET] again to paste the stored contents. M disappears.

NOTE: Remember that pushing [MW] is alwaysnecessary to program contents into a memorychannel. Pasted contents will be cleared if the[MW] key is not pushed for 1 sec.

ClearingInformation programmed into a memory channel canbe cleared (erased).qSelect the memory channel to be cleared.wPush and hold [M-CL] until the receiver emits 3

beeps.Convenient: Bank assign functionUsing the bank assign function, memory channelscan be removed (along with their programmed con-tents) from a particular memory bank and placedtemporarily in the free bank. See p. 21.

[MW] key

Push for 1 sec.

USR-A

USR-A

BLANK

MW

FM OFF

kHz

DLY

FM OFF

kHz

DLY

[M-SET] key

[M-CL] key

20

5MEMORY CHANNELS

Channel/bank namesChannel names of up to 8 characters and bank namesof up to 5 characters can be programmed for conve-nience. Programmed names can be easily copied toother channels using the copy/paste function.

qSelect the desired memory channel.wSet the frequency (and mode/tuning steps), then

push and hold the [MW] key.When no data is programmed, BLANK appears andmemory names cannot be programmed.

ePush [CE NAME].A cursor appears at the first character space of thename area.

rEnter the desired name via the keypad.Push the appropriate keys to input the desired charac-ters.

To erase a character, overwrite with a space using the[M-CH ] key.

To move the cursor forwards or backwards, use the []or [CE] key.

tPush [ENT] to input the set name.

qSelect the desired bank using [M-CH BANK] or[ENT BANK].

wPush [CE NAME].A cursor appears at the first character space of thename area.

When no data is programmed, (BLANK appears) thecursor does not appear. Program a frequency orchange the channel in such cases.

ePush [] to move the cursor to the bank namearea.

rEnter the desired name via the keypad.Use the same method as for channel names (seeabove).

tPush [ENT] to input the set name.NOTE: When using [CE] on the last digit of thebank name, the current name is cleared and theprevious one is substituted. DO NOT forget topush [ENT] after the bank name is set.

[CEs NAME] key

1 QZ

ENT

BANK

ENT

WXY9

NAME

CE

to

USR-A

USR-A

USR-A MEMONAME

USR-A MEMONAME

DChannel name programming

DBank name programming

USR-A

USR-A

USR-A MEMONAME

MEMONAME

MEMONAME

BANKN MEMONAME

BANKN MEMONAME

ENT

BANK

ENT

.

NAME

CE

5 times

1 QZ

WXY9to

21

5 MEMORY CHANNELS

Assigning channel numbersThe IC-R8500 has 20 banks in which memory chan-nels can be programmed and arranged. By default,each bank contains 40 memory channels, however,channels can be deleted from or added (inserted) tobanks to suit your preferences and operating style.

Deleted channels are stored temporarily in theFREE bank.

NOTE: When shipped from the factory or afterresetting the receivers CPU, the FREE bank hasno memory channels and cannot be selected.

To rearrange bank channel assignments:qDelete memory channels from banks that have

more memory channels than you need.Deleted channels are assigned to the free bank auto-matically.

wAdd (or insert) memory channels to banks in whichyou want to add channels.Channels added to a bank are deleted from the freebank.

qSelect the bank and memory channel you wish todelete.

wPush [BANK] for 1 sec.One of INS. 1CH, DEL. 1CH, ADD.10CH, orADD. 1CH,appears and flashes.

Push [BANK] momentarily to exit the condition andreturn to the previous display, if desired.

eRotate [M-CH] until DEL. 1CH appears in thedisplay.

rPush [BANK] for 1 sec. to delete the selectedchannel.The memory channel (but not its contents) is moved tothe FREE bank.

Memory channels can only be deleted one at atime to prevent accidental deletion of multiplechannels; when you want to delete more thanone channel from a bank, repeat the abovesteps as many times as necessary.NOTE1: Deleted channels are moved to thefree bank, however, the programmed contentsare erased.NOTE2: The number of banks cannot bedecreased. This means that if there is only onechannel in a bank, it cannot be moved to thefree bank.

DDeleting memory channels

[BANK] switch[M-CH] control

USR-T DEL. 1CH

BLANKUSR-T

BANK

BANK

BANK

(for 1 sec.)

The number of channels in this bank isdecreased.

USR-T BLANK

INS. 1CHUSR-T

BANK

BANK

BANK

M-CH

(for 1 sec.)

22

5MEMORY CHANNELS

qSelect the bank you wish to add memory chan-nel(s) to.

wPush [BANK] for 1 sec.One of INS. 1CH, DEL. 1CH, ADD.10CH, orADD. 1CH,appears and flashes.

Push [BANK] momentarily to exit the condition andreturn to the previous display, if desired.

eRotate [M-CH] to select the following:

rPush [BANK] for 1 sec. to perform the selectedoperation.The memory channel(s) are deleted from the FREEbank and added/inserted to the selected bank.

Memory channels cannot be added/inserted into amemory bank when the FREE bank is empty.

DAdding/inserting memory channels

USR-T BLANK

USR-T

BANK

BANKINS. 1CH

USR-TBANK

BLANK

Insert 1 channel

USR-TBANK

ADD. 1CH

Add 1 channel

USR-TBANK

ADD.10CH

Add 10 channels

USR-TBANK

DEL. 1CH

Delete channel(see opposite page)

BANK

M-CH

(for 1 sec.)

BANK

(for 1 sec.)

INDICATION DESCRIPTION

INS. 1CH

1 channel will be inserted in front ofthe selected channel.Programmed contents after the insertedchannel are shifted accordingly.

ADD. 1CH1 channel will be added at the end ofthe selected bank.

ADD.10CH10 channels will be added at the endof the selected bank.

Operation

DMemory scan

DMemory select scan

23

6 SCANS

All memory channels (except skip channels) in theselected bank are scanned at up to 40 ch/sec.

qPush [M-CH BANK] or [ENT BANK] to selectthe desired bank.Direct selection is also available as below.

wSet the [SQUELCH] control to the threshold point.ePush [MEMO] to start the scan.

MEMO appears in the bank name area.rPush [MEMO] again to stop the scan.Convenient:Direct bank selectionMemory scan can be startedin a specific bank without using [BANK/]:Enter one or two digits for the bank number, then

push [MEMO].Bank selection during memory scanThe selectedbank can be changed without stopping the scan:Enter one or two digits for the bank number, then

push [ENT].Bank limit and skip scan releaseWhen startingmemory scan, the bank limit and channel skip functionsare activated automatically. Refer to p. 26.

Memory select scan allows you to increase scan effi-ciency by searching for specified channels only,thereby increasing the rate at which the scan cyclesthrough the memory channels. Set high priority chan-nels as select channels (memory select scansearches for signals on these channels) while leavingout lower priority channels.

Preparationspecifying select channels:Select the channel you want to specify as a selectchannel, then push [SEL] for 1 sec.Start/stop:qSelect the desired bank using [M-CH BANK] or

[ENT BANK].wSet the squelch control to the threshold point.ePush [SEL] momentarily to start scan.

SEL appears in the bank name area.rPush [SEL] again to stop the scan.

NOTE: Memory select scan does not start unless2 or more channels in the bank are specified asselect channels.

Convenient:The same convenient functions are available as de-scribed above.

Mch 1

Mch 2 Mch 3 Mch 4

Mch 5

Mch 6Mch 7Mch 39

SkipSelect

Select

SelectSelect

Push [MEMO]

FM OFF

kHz

DLY

MEMO

MEMO appears

Push [SEL]

FM OFF

kHz

DLY

SEL

SEL appears

Mch 1

Mch 2 Mch 3 Mch 4

Mch 5

Mch 6Mch 7Mch 39

SkipSelect

SelectSelect

SelectSelect

24

6SCANS

DProgrammed scan

DAuto memory write scan

Programmed scan (and auto memory write scan)searches for signals within a specified frequencyrange, using the selected tuning step increments. Theresult is like an automatic rotating of the main dial.

Preparationsetting the scan range:Push and hold [PROG] to enter the prog bank, theninput the desired edge frequencies, mode and tuningsteps. Refer to p. 27 for details.Start/stop:qSet the [SQUELCH] control to the threshold point.wPush [PROG] to start the scan.

PROG (and scan range number) appears in the bankname area.

ePush [PROG] again to stop the scan.Convenient:Direct range selectionThe desired programmedscan range can be selected using the keypad.Push a numeral key before or after pushing the

[PROG] key.Skip scan releaseProgrammed scan skips all fre-quencies specified as skip channels in all 1000 chan-nels.

Auto memory write scan operates in the same wayas programmed scan. However, when a signal isreceived, the received frequency is automaticallywritten into a memory channel in the auto write bank.

Preparationwritten memories condition:Push and hold [AUTO] to enter the written memorysetting condition, then rotate the main dial to selectthe condition.

: Previously written memoriesin the Auto bank are saved, then frequencies arewritten into the next available channels.

: Previously written mem-ories in the Auto bank are cleared, then frequenciesare written into channels, starting from channel 0.Start/stop:qSet the [SQUELCH] control to the threshold point.wPush [AUTO] momentarily or for 1 sec. to start the

scan.CAUTION:Be sure the written memories condition is setas desired, otherwise previously written memories arecleared.

AUTO (and scan range number) appear in the bankname area.

ePush [AUTO] again to stop the scan.Convenient:The same convenient functions are available as de-scribed above.

Programmed edges

Push [PROG]

FM OFF

kHz

DLY

PROG0 *NONAME*

PROG appears

AUTO bank01234

9899

1234.567.001235.678.001235.890.001240.050.00---------------

---------------

Push [AUTO]

FM OFF

kHz

DLY

AUTO0 *NONAME*

AUTO appears

AUTO START

AUTO CL&START

25

6 SCANS

DPriority scanPriority scan monitors a specified frequency (the pri-ority channel) once every 116 sec. (programmable)during any operation, such as receiving, scanningother channels, etc.

Preparationpriority channel programming:qPush [PRIO] for 1 sec.

*SET* appears in the bank name area, thenchanges to a flashing PRIO.

Using this method, the priority channel can be called upat any time with one push.

wSet the desired frequency, mode and memoryname.

ePush [MW] for 1 sec. to write the contents into thepriority channel.

rPush [PRIO] again to return to the previous chan-nel.

Start/stop:Push [PRIO] to start/stop the scan.Priority scan can be used in combination with other scantypes: start another scan type during priority scan; or,push [PRIO] while operating another scan.

To operate memory scan or memory select scan in aspecific mode (ignoring other modes), the modeselect function is available.

qPush [MEMO] or [SEL] to start memory scan ormemory select scan, respectively.

wSelect the desired mode to operate the scan in viathe mode switches.The mode select function is applied to memory or mem-ory select scan.

ePush [MEMO] or [SEL] again to stop the scan.

Priority scan

Programmed scan with priority scan

Mode select function

Specifying skip channelsqSelect the memory channel to be specified as a

skip channel.wPush [SKIP] for 1 sec. to toggle the setting ON and

OFF.SKIP-CH appears when skip is set.

Programming skip frequencies(for programmed scan)qStart programmed scan.wWhen the scan pauses on an undesired signal,

push [MW] for 1 sec.The frequency is memorised into the skip bank as askip frequency.

The specified channel is skipped during memory andmemory select scans.

The programmed frequency is skipped during pro-grammed and auto memory write scans.

Specifying skip channel and frequency

ICOM IC-R8500SKIP-CH

SKIP

kHz

The channel is specified as a skip channel.

Push [MW] for 1 sec. while programmed scan pauses.PROG0 IC-R8500RECV

OFF DLY

Mch 1

Mch 2 Mch 3 Mch 4

Mch 5

Mch 6Mch 7Mch 39

SkipSelect

FM

FM

WFM

USB

USBUSB

AM

USB

Select

SelectSelect

26

6SCANS

Automatic bank limit/skip functionsWhen starting a scan, the following functions areautomatically turned ON by default; and the [SKIP]and [BANK] switches are deactivated during scan.The bank limit function (for memory scan and selectmemory scan)The memory scan operates withinthe selected bank only.

Turning OFF the automatic functionqPush [MEMO] for 1 sec.

A display as at right appears.wRotate the [M-CH] selector to

select the item, SKIP orBANK.

eRotate the main dial to selectthe function AUTO or MANU-AL.

rPush [MEMO] to return to theprevious display.

SKIP AUTO

SKIP MANUAL

BANK AUTO

BANK MANUAL

The skip function is turned ON automatical-ly at scan start.[SKIP] does not function during scan.

The bank limit function is turned ON au-tomatically at scan start.[BANK] does not function during scan.

The scan skip function is turned ON and OFF by [SKIP] regardless of scan start.

The bank limit function is turned ON and OFF by [BANK] regardless of scan start.

Voice scan control functionThis function is useful when you dont want unmodu-lated signals pausing or cancelling a scan. Whenactivated, the receiver checks received signals forvoice components.If a receiver signal includes voice components, andthe tone of the voice components changes within 1sec., scan pauses (or stops). If the received signalincludes no voice components or the tone of thevoice components does not change within 1 sec.,scan resumes.

To toggle the function ON and OFF, push [VSC]. VSC appears while it is activated.

The VSC function activates for any scan.The VSC function resumes the scan on unmod-ulated signals even when the resume condition isset to OFF or .

Scan edge 1

ScanSkip

Scan pauses or iscancelled.

Unmodulatedsignal

Modulatedsignal

Scan edge 2

FM VSC OFF

kHz

DLY

ICOM- IC-R8500

VSC appears

The skip function (for any scan except priorityscan)memory channels specified as skip chan-nels are not checked during memory scan andselect memory scan; the frequencies which are pro-grammed into memory channels as skip channels(not only in the skip bank but any memory chan-nels) during programmed scan and auto memorywrite scan.

27

6 SCANS

Programming scan edge frequenciesA set of scan edge frequencies must be programmedbefore starting the programmed or auto memorywrite scans. 10 pairs of scan edges are available:0P1 to 9P2.qPush [PROG] for 1 sec.

*SET* appears in the bank name area, thenchanges to a flashing PROG.

wRotate the [M-CH] selector to select the lowerscan edge in a pair e.g. 0P1.The keypad can also be used for selection.

eSet the frequency, mode, tuning step and memoryname then push [MW] for 1 sec. to program one ofthe scan edges.

rRotate the [M-CH] selector to select the otheredge in the pair e.g. 0P2.

tSet the frequency then push [MW] for 1 sec. to program.Mode, tuning step and name are common to both scan edges.

yPush [PROG] momentarily to return to the previouschannel; or repeat w to y for other scan edges.

Scan pauses when finding a signal, and then resumesor is cancelled depending on the selected scanresume condition. There are 3 resume conditions.Push [DLY] one or more times to select a resumecondition.

Scan resume OFFScan pauses until signal disap-pears, then resumes 3 sec. afterthat.

Scan resume ON with adjusteddelay period

Scan pauses for the adjusteddelay period after receiving a signal, then resumes.When the received signal disappears, scan resumesapprox. 3 sec. after that.

Scan cancelScan is cancelled when a signalis found during scan.

Scan speed/delay functionsDScan resume condition

Signal no signal

scanning scanningpausing3 sec.

receiving a signal no signal

Scan

[ ]switch

OFF DLY

DLY D/S

OFF DLY

Signal no signal

scanning scanningpausing

delay time


Scan

OFF DLY

Signal no signal

scanningscan is cancelled


Scan

OFF DLY

[ ]switchPROG

[MW] switch [M-CH] selector

AM

BANK

OFF

kHz

DLY

PROG *NONAME*

AM

BANK

OFF

kHz

DLY

PROG *NONAME*

28

6SCANS

When scan speed is assigned to the [DELAY/SPEED]control (see above), the scan speed can be instantlyupdated during scan operation.The name area shows as at right for 1 sec. afterrotating the control.

When scan delay time is assigned to the[DELAY/SPEED] control, the scan speed is fixedat the maximum of 40 ch/sec.

Highest scan speed: 40 ch/sec.

Lowest scan speed: 1 ch/sec.

SPEED

SPEED

DELAY/SPEED

DELAY/SPEED

The [DELAY/SPEED] control adjusts the scan delayperiod (scan resume period) when:The scan delay function is assigned to the[DELAY/SPEED] control (see above).

DLY is selected for the scan resume condition withthe [DLY ] switch.

When scan speed is assigned to the[DELAY/SPEED] control, the scan delay is deter-mined by the set value of 3 to 18 sec.

DScan delay

Longest delay time: 18 sec.

Shortest delay time: 3 sec.

DELAY

DELAY

DELAY/SPEED

DELAY/SPEED

The function of the [DELAY/SPEED] control is selec-table, as shown below, to suit your operating style.qPush [DLY ] for 1 sec. to enter the setting con-

dition.wRotate the main dial to select the function for the

[DELAY/SPEED] control.eWhen the scan speed is assigned to the

[DELAY/SPEED] control, the scan delay time isdetermined while VR:SPD DLY: 3S appears.Rotate the [M-CH] selector to set the delay time.

rPush [DLY ] to return to the previous display.

DAssigning a function to the [DELAY/SPEED] control

Scan speed is assigned to the [DELAY/SPEED] control

Toggle via themain dial

Adjustablevia the [M-CH]selector

Scan delay is assigned to the [DELAY/SPEED] control

VR:SPD DLY= 3S

VR:DLY SPD=MAX

DScan speed

The IC-R8500 has a sleep timer function to automati-cally turn the power OFF after a specified period.

DOperationqPush [SLEEP/ ] momentarily, several times, to

activate the sleep timer and set the power OFF period.When the sleep timer is activated, appears inthe display.

5 settings are available: 120, 90, 60, 30 min. and sleepOFF.

w2 sec. after performing step q above, the receiverreturns to the previous display.

eTo confirm the set sleep period, push [SLEEP/ ]momentarily, one time.Be careful not to push the switch more than once, other-wise the sleep period may be changed.

rTo turn ON the receiver after the sleep timer hasturned power OFF, push [POWER] OFF then ONagain.The sleep timer is cancelled.

29

7 SLEEP TIMER

[SLEEP/ ] switchSET

SLEEP

IC-R8500ICOM

SLEEP

Minutes

MinutesEach push of SLEEP/ SET

SLEEP/ SET

after 2 sec.

Previous display

Set time

Push once

kHz

SLEEP

Minutes

SLEEP

30

8SET MODEGeneralSet mode is used for programming infrequentlychanged values or conditions of functions. TheIC-R8500 has 2 separate set modes: quick set modeand initial set mode.

DSelecting quick set modeqPush [SLEEP/ ] for 1 sec.

Quick set mode is selected and one of its items appears.wRotate the [M-CH] control to select the desired item.eRotate the main dial to set the values or conditions

for the selected item.rRepeat steps w and e to set other items.tTo exit quick set mode, push [SLEEP/ ] again.

Pushing any other switch will also exit quick set mode.

DSelecting initial set modeqPush [POWER] to turn power OFF.wWhile pushing [SLEEP/ ] push [POWER] to turn

power ON. Initial set mode is selected and one of its items appears.

eRotate the [M-CH] control to select the desired item.rRotate the main dial to set the values or conditions

for the selected item.tRepeat steps e and r to set other items.yTo exit initial set mode, push [POWER] to turn

power OFF.uPush [POWER] to turn power ON again.

The conditions selected in initial set mode are now effec-tive.

SCAN SET

Main dial (for contents)

[SLEEP/ ](push for 1 sec.)

[M-CH](for items)

SET

SCAN SET

[POWER] Main dial (for contents)

[SLEEP/ ] at power ON [M-CH](for items)

SET

WFM OFF

kHz

DLY

HIGH DIMMER

Item numberItemValue or

condition

[DISPLAY EXAMPLE: QUICK SET MODE]

ON REC REMO

Item numberItemValue or

condition

[DISPLAY EXAMPLE: INITIAL SET MODE]

31

8 SET MODE

Quick set mode items

Initial set mode items

DIMMER

This item toggles the intensity of the display back-lighting between high or low. Bright backlighting

(default).

HIGHDark backlighting.LOW

BEEP

A beep sounds each time a switch is pushed for con-firmation. This function can be turned OFF for silentoperation.

Confirmation beepsON (default).

ONConfirmation beepsOFF.

OFF

LOCK

This item sets the lock function to electronically lockthe main dial only or both the main dial and the panelswitches.

Only the main dialcan be locked (default).

DIALBoth the main dial and panelswitches can be locked.

PANEL

AUTO TS

This item sets the auto tuning speed. The main dialnormally changes the frequency [400] [tuning step]/revolution. When auto tuning speed is turned on thisincreases to [2000] [tuning step]/revolution duringquick rotation of the dial.

The auto tuning speedfunction is ON (default).

ONThe auto tuning speedfunction is OFF.

OFF

HF ANT

This item sets the active HF antenna connector onthe rear panel. Either the 50 (SO-239 coaxial) or500 (phono RCA connector) can be activated.

The SO-239 antenna con-nector is activated (default).

50 The RCA (phono) connectoris activated.

500

REC REMO

This item activates/deactivates the REC REMOTEjack on the front panel. When ON is selected, the[REC REMOTE] jack is at a low level when thesquelch opens via the internal relay.

The REC REMOTE jackcan be used (default).

ON The REC REMOTE jack hasno function and no relayswitching sound is heard.

OFF

REC SPCH

When the optional UT-102 VOICE SYNTHESIZER isinstalled and scan is in use, the detected frequencyis announced each time scan pauses, regardless ofthe [SPCH/LOCK] switch. This announcement canbe turned ON and OFF.

The detected frequency isannounced when scanpauses (default).

ON The optional voice synthe-sizer activates via the[SPCH] switch only.

OFF

32

8SET MODE

SPCH LAN

When the optional UT-102 VOICE SYNTHESIZER UNIT isinstalled, you can select between English andJapanese as the language.

Voice synthesizer functionsin English (default).

ENG Voice synthesizer functionsin Japanese.

JPN

SPCH SPD

When the optional UT-102 VOICE SYNTHESIZER UNIT isinstalled, you can select between faster or slowersynthesizer output.

Voice synthesizer outputis faster (default).

FASTVoice synthesizer outputis slower.

SLOW

CIV ADDR

To distinguish equipment, each CI-V transceiver/receiv-er has its own Icom standard address in hexadecimalcode. The IC-R8500s address is 4AH.When 2 or more IC-R8500s are connected to anoptional CT-17 CI-V LEVEL CONVERTER, rotate themain dial to select a different address for each IC-R8500 in the range 01H to 7FH.

Address set to 4AH(default).

4AHAddress set to 01H.01H

CIV BAUD

This item sets the data transfer rate. When AUTOis selected, baud rate is automatically set accordingto the connected controller or other Icom CI-V radio.

Auto baud rate(default).

AUTO19200 bps19200

CIV TRAN

Transceive operation is possible with the IC-R8500connected to an Icom CI-V radio. When ON isselected, changing the frequency, operating mode,etc. on the IC-R8500 automatically changes those ofconnected radios and vice versa.

Transceive ON(default).

ONTransceive OFF.OFF

CIV 731

When connecting the IC-R8500 to the IC-735 fortransceive operation, you must change the operatingfrequency data length to 4 bytes.This item must be set to ON only when operating trans-ceive with the IC-735.

Frequency data set to5 bytes (default).

OFFFrequency data set to4 bytes.

ON

33

9 CONNECTOR INFORMATIONDRS-232C socket

DRemote jack

D IF OUT jack

DAGC OUT jack

DExternal speaker

Pin Port name Description1 GND Grounded.2 RXD Input port for CI-V format data; +12V/12V.3 TXD Output port for CI-V format data; +12V/12V.

45

RTSCTS

Shorten these ports inside.Can be connected to pin 8 (DCD) via the inter-nal circuit board (coffee beans).

6 DSR NC; can be connected to pin 20 (DTR) via theinternal circuit board (coffee beans).7 GND Grounded.

8 DCD NC; can be connected to pins 4 and 5 (RTS/CTS)via the internal circuit board (coffee beans).

919 NC No connection.

20 DTR NC; can be connected to pin 6 (DSR) via theinternal circuit board (coffee beans).2125 NC No connection.

13 1

25 14

Pin Port name DescriptionInner REMOTE Input/output port for CI-V format data; +5 V/0 V.Outer GND Grounded.

Pin Port name Description

Inner IF OUTFrequency:10.7 MHzOutput level: 60 dBm (with 50 dBm input froman antenna connector in WFM mode)

Outer GND Grounded.

*Output is selectable with an internal jumper pin (p. 16).


Inner*

AGC outOutput voltage:1 to 2.4 V DC

(signal strength weak to strong)Output impedance:2.2 M

Audio detect

Output level: 200 mV rms (at Mod.=1 kHz, Dev.=3.5 kHz)Output impedance:4.7 kBefore the frequency de-emphasis stage.Usable for FM only (not including WFM).

Outer GND Grounded.


Inner AF out Output level:More than 2 WOutput impedance:48 Outer GND Grounded.

3.5 mm (diam.) 2-conductor

Outer

Inner

RCA (phono) jack

Inner

Outer

RCA (phono) jack

Inner

Outer


Outer

Inner

34

9CONNECTOR INFORMATION

DDC 13.8 V and DC IN sockets

DREC REMOTE jack

DC IN

DC 13.8 V

DC 13.8 V

Inner

Outer

[POWER]switch

Receivercircuit

Internalregulatorcircuit

DC IN

4 1

Pin Port name DescriptionInner DC IN Accepts connection to the AD-55A/V onlyOuter GND Grounded.


1 13.8 IN 13.8 V DC input; current consumption 2 A

2 12.5 OUT 12.5 V DC output when connecting AD-55/A/Vto [DC IN] socket. Max. 2 A3 NC

4 GND Grounded.


Inner SQLGrounded when squelch opens.Can be deactivated via initial set mode. (p. 31)Max. current: 1 A/12 V DC

Outer GND


Inner DET Output detected audio output.100300 mV rms/4.7 k

Outer GND Grounded.

Pin Port name DescriptionInner, Middle Audio

Outputs audio.Output impedance:416

Outer GND Grounded.


Outer

Inner

DREC OUT jack


Outer

Inner

DPHONES jack

6 mm (diam.) 3-conductorMiddleInner

Outer

CONTROL COMMANDS10

35

The IC-R8500 can be connected to a PC via the PCsRS-232C port. This allows you to control the receiver

from the PC and/or transfer data from the receiver tothe PC.

Operation Cn Sc RemarkReading freq. edgesReading operating freq.Reading operating mode

020304

Reading M-ch contents packageReading bank name

1A1A

0103

add bn+mc*add bn*

Reading squelch conditionReading S-meter levelReading model ID

15

19

010200

05 add fd*

Set operatingmode 06

0001010102020201020303010302050105020601

Memory channel selectionBank selectionMemory write

080809

A0

mc*bn*

Set M-ch contents & write packageSet bank nameMemory clear

1A1A0B

0002

add dt*add bn+nd*

Stop scan

0E

00Programmed scan startAuto memory write scan start

0204

note 1note 1

Memory scan startSelect memory scan startMode select scan start

222324

note 2note 2note 2

Priority scan 42SEL-CH releaseSEL-CH tag

B0B1

VSC deactivationVSC activation

C0C1

Scan resume selection Scan resume selection OFFScan resume selection DLY

D0D1D3

LSBUSBAMAM narrowAM wideCWCW narrowFMFM narrowWFM

Operation Cn Sc Remark

Tuning step 10

0001020304050607080910111213

11

00102030

13 00

01030405

add gd*add gd*add gd*add gd*

Memory clear 16

101120213031

Power OFF (activating sleep)Power ON (from sleep active) 18

0001

1 MHzprogrammableOFF10 dB20 dB30 dB

frequency

10 Hz50 Hz100 Hz1 kHz2.5 kHz5 kHz9 kHz10 kHz12.5 kHz20 kHz25 kHz100 kHz

Voicesynthesizer

Attenuator

AF gain settingSquelch level settingIF shift settingAPF control setting

14

AGC OFFAGC ON

APF OFFAPF ON

NB OFFNB ON

Note 1: Only scan group 0 is usable.Note 2: Use these commands after sending a bank or mode

command.

Set frequency

Command table

FE FE 4A E0 Cn Sc Data area (e.g. fd) FD

Prea

mbl

e co

de (fi

xed)

PCs

add

ress

IC-R

8500

s a

ddre

ss(se

lectab

le in

set m

ode)

Com

man

d nu

mbe

r(se

e tab

le)Su

b co

mm

and

num

ber

(see t

able)

BCD

code

are

a(R

EMAR

K in

tabl

e)

End

of m

essa

ge c

ode

FE FE E0 4A Cn Sc Data area (e.g. fd) FD

Prea

mbl

e co

de (fi

xed)

PCs

add

ress

IC-R

8500

s a

ddre

ss(se

lectab

le in

set m

ode)

Com

man

d nu

mbe

r

Sub

com

man

d nu

mbe

r

BCD

code

are

a

End

of m

essa

ge c

ode

Data formatBasic format from PC to IC-R8500 Answer from IC-R8500 to PC

36

10COMMAND LIST

OK message from IC-R8500 to PC NG message from IC-R8500 to PC

Memory channel contents set & write (1A 00)

The above data packet is an example of programmingthe following into memory channel 123 of bank num-ber 19:Frequency:1,234,567,890 HzMode:FMTuning step:199.5 kHz (programmable step)Attenuator: 10 dBScan select: specifiedScan skip: specifiedMemory name: IC-R8500

Scan skip and select channels

FE FE E0 4A FB FD

Prea

mbl

e co

de

PCs

add

ress

IC-R

8500

s a

ddre

ss

OK

code

End

of m

essa

ge c

ode

FE FE 4A E0 1A 00 1 9 0 1 2 3 9 0 7 8 5 6 3 4 1 2 0 5 0 1 1 3 9 5 1 9 1 0 0 3 4 9 4 3 2 0 5 2 3 8 3 5 3 0 3 0 FDMemory nameTuning stepMode(Sc)FrequencyCH no.Bank SCNATT

Prea

mbl

e co

de

IC-R

8500

s a

ddre

ss

PCs

add

ress

Com

man

d nu

mbe

rSu

b co

mm

and

(IC-R

8500

s c

om

ma

nd)

10 H

z1

Hz

1 kH

z10

0 Hz

100

kHz

10 k

Hz10

MHz

1 M

Hz

1 G

Hz10

0 M

Hz

End

of m

essa

ge c

ode

ASCI

I cod

e

BCD

code

are

a(on

ly ne

eded

whe

n 13

is s

elec

ted)

I C - R 8 5 0 0

FE FE E0 4A FA FD

Prea

mbl

e co

de

PCs

add

ress

IC-R

8500

s a

ddre

ss

NG

cod

e

End

of m

essa

ge c

ode

Commentnumber Scan select Scan skip

00 OFF OFF01 OFF Specified02 Specified OFF03 Specified Specified

Clearing the specified channel data(Memory channel contents set & write)

Special bank number and channels (bn)

FE FE 4A E0 1A 00 19 0 1 2 3 FF FD

Prea

mbl

e co

de

PCs

add

ress

IC-R

8500

s a

ddre

ss

Com

man

d nu

mbe

r

End

of m

essa

ge c

ode

Blan

k da

ta

Mem

ory

chan

nel

num

ber

IC-R

8500

s c

om

mand

Bank

num

ber

Special bank Bank number

FREE 20

AUTO 21

SKIP 22

PROG 23

PRIO 24

Remarks

For programmedscan, channel num-bers are as follows:0P1=00, 0P2=01,1P1=02, 1P2=03,etc., up to 9P1=18and 9P2=19.

There is only onechannel in the prior-ity bank.

Gain and level data (gd; BCD data)AF GAIN

SQUELCH

Max.counterclockwise0000

Max.clockwise0255

IF SHIFT

APF control

Max.counterclockwise0000

Max.clockwise0255

center

0128

Disassembly

Fuse replacementIf a fuse blows or the receiver stops functioning, try tofind the source of the problem, and replace the dam-aged fuse with a new, rated fuse.

Level adjustments

3 A F

GB

For DC cable fuse For internal fuse

37

11 MAINTENANCE

Memory backupAll of the CPUs memory is backed up by an EEP-ROM (Electronically-Erasable Programmable Read-Only Memory). All data you set, such as memory con-tents, set mode contents, etc. is stored in this EEP-ROM. There is no internal lithium battery.

CPU resettingIf the IC-R8500 is behaving erratically, this may be anindication of a CPU malfunction. In such cases, resetthe CPU.

While pushing [MW], push [POWER] in to turn on thereceiver power.The CPU is reset.

NOTE: Resetting the CPU clears all memory con-tents and returns internal settings to their factorydefaults.

CleaningIf the receiver becomes dusty or dirty, wipe it cleanwith a dry, soft cloth.

AVOID the use of strong chemical solvents such asthinner, benzine or alcohol to clean thereceiver. These may damage the receiverssurfaces.

For internal maintenance and optional installations,disassemble the receiver.

qRemove 6 screws from the top of the receiver and4 screws from its sides.

wCarefully lift up the top cover while disconnectingthe plug from the speaker cable.

eTurn the receiver upside down.rRemove 6 screws from the bottom cover, then lift

up the bottom cover.Speakercable

MAIN unitFuse(FGMB 125 V 3 A)

CAUTION: DISCONNECT the DC power cableor AC adapter before performing any work on thereceiver.

R254R252

R252 adjusts the beep levelR254 adjusts the UT-102 output level

38

12OPTIONAL INSTALLATIONSUT-102 VOICE SYNTHESIZER UNITThe UT-102 announces the accessed frequency in aclear, electronically generated voice, in English (orJapanese) when pushing [SPCH] or when a signal isdetected during scan (see p. 31, 32 for settings).qRemove the top cover as shown opposite.wRemove the protected paper attached to the bot-

tom of the UT-102 to expose the adhesive strip.eConnect the UT-102 as shown in the diagram at

right.rReplace the top cover.

J12

UT-102

FL-52A CW NARROW FILTERThe IC-R8500 has a CW narrow mode which pro-vides better S/N (signal-to-noise) and also rejectsnearby interference. The CW narrow filter is helpfulwhen receiving CW and radio-teletype signals.

qRemove the top cover as shown opposite.wConnect the FL-52A as shown in the diagram at

right.Make sure it is connected in the proper orientation.Attached nuts on the FL-52A are not necessary. If youwant to install the filter more securely, open the MAINunit, then use the nuts on the bottom of the MAIN unit.

eReplace the top cover.

FL-52A

Under the top cover

Under the top cover

39

12 OPTIONAL INSTALLATIONS

CR-293 HIGH STABILITY CRYSTAL UNITA temperature-compensating crystal with a stability of3 ppm is built-in to the receiver. For more demand-ing operation, the CR-293 HIGH STABILITY CRYSTALUNIT is available. It has a stability of 0.5 ppm.

qRemove the bottom cover as shown on p. 37.wRemove 6 screws from the metal plate, then

remove the metal plate and shield cover.

eRemove 10 screws from the PLL unit, then openthe unit to expose the bottom.

rUnsolder the feet of the internal crystal unit, thenremove it.

tPlace the CR-293 in the space available as shownin the diagram, then solder its feet into place (6points).

yAdjust the reference frequency using a frequencycounter.

uReplace the ground spring to its original position.iReturn the shield cover, metal plate and bottom

cover to their original positions.

NOTE: The CR-293 is an oven-type crystal unit,and the specified frequency stability describedabove is guaranteed 1 min. after power ON.

Shieldcover

PLL unit

Groundspring

PLL unit

CR-293Internalcrystalunit

Metal plate

13TROUBLESHOOTING

40

The following chart is designed to help you correctproblems which are not equipment malfunctions. Ifyou are unable to locate the cause of a problem or

solve it through the use of this chart, contact yournearest Icom Dealer or Service Center.

POSSIBLE CAUSE SOLUTION REF.

POW

ER

DC power cable is improperly con-nected.

A fuse is blown.

During AC adapter operation, thejumper connector is not in use.

External 12 V DC is connected to the[DC IN] jack.

Reconnect the DC power cable se-curely.

Check for the cause, then replace thefuse with a spare one.

Connect the jumper connector to the[DC13.8V] jack on the receivers rear panel.

Connect the external power source tothe [DC13.8V] jack. The [DC IN] jack ac-cepts an AC adapter (AD-55/A/V) only.

p. 8

p. 37

p. 8

p. 8

REC

EIVE

FUN

CTIO

NS

Volume level is too low.

The squelch is closed.

An external speaker or headphones areconnected.

CW narrow mode is selected when nooptional filter is installed.

Rotate [AF GAIN] clockwise to obtain asuitable listening level.

Rotate [SQUELCH] counterclockwise toopen the squelch.

Disconnect the external speaker orheadphones.

Select another mode or install the op-tional CW narrow filter.

p. 14

pgs.13, 38

The coaxial cable is cut. No antenna is connected. The connected antenna is not matched

to the receive frequency. Wrong antenna connector is used for

V/UHF and HF antenna. Wrong antenna connector is selected in

set mode for HF antenna. An RF attenuator is activated.

Fix the coaxial cable. Connect an antenna. Connect an antenna matched to the re-

ceiving frequency. Check the antenna connection.

Select the proper antenna connector:SO-239 or phono (RCA).

Push [ATT 10 dB] or [ATT 20 dB] to can-cel the function.

p. 8p. 8

p. 8

p. 31

[IF SHIFT] is rotated too far CCW orCW.

[APF] is rotated too far CCW or CW.

The wrong mode switch is pushed.

Set [IF SHIFT] to the center position.

Set the [APF] control to the center positionor push the [APF] switch to turn it OFF.

Push the correct mode switch.

p. 14

p. 15

p. 13

The operating frequency is lower than30 MHz. (WFM mode cannot be se-lected below 30 MHz.)

Set the frequency above 30 MHz whenin WFM mode.

p. 13

Documents

icom Communications Receiver IC-R8500