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IC-R8500 instruction Manual

1. 1 6 Bi Front panel iiie eis 1 ii Rear panel iie rrERPO CERES 5 Wi Function display seem 6 2 CONNECTIONS cessere 7 10 E Mounting installation eeenne 7 li Required connections ss 8 W Antenna connection eeese 9 B Gro nding inicie e eee cs 9 Mi Tape recorder connections eerren 10 iW Transceive function senn 10 ll Connecting to a PC ssssenem 10 lil Data demodulation terminal sees 10 3 FREQUENCY SETTING 11 12 M Read me first esssssssssssseeeeeen 11 M Using the keypad semHHH 11 M Using the main dial eeeennn 12 Wi Lock function nai ai 12 4 RECEIVE FUNCTIONS 13 16 ME Initial settings eeseeeeceenen 13 H Mode selection eene 13 iil Squelch function essse 14 Wi Functions for FM sseessssesssseeme 14 E Functions for SSB CW ssee 14 E Data communications eee 16 5 MEMORY CHANNELS 17 22 General sped 17 E Bank selection sesssssem 17 Wi Channel selection seeen 18 iIProgramming eo HER CREER 19 E Copy and past
2. v Convenient Direct range selection The desired programmed scan range can be selected using the keypad x Push a numeral key before or after pushing the PROG key Skip scan release Programmed scan skips all fre quencies specified as skip channels in all 1000 chan nels Programmed edges e Cc cd PROG appears Auto memory write scan Auto memory write scan operates in the same way as programmed scan However when a signal is received the received frequency is automatically written into a memory channel in the auto write bank Preparation written memories condition Push and hold AUTO to enter the written memory setting condition then rotate the main dial to select the COSI Previously written memories in the Auto bank are saved then frequencies are written inte the next available channels i Previously written mem ories in he Auto bank are cleared then frequencies are written into channels starting from channel 0 Start stop Set the SQUELCH control to the threshold point Push AUTO momentarily or for 1 sec to start the scan e CAUTION Be sure the written memories condition is set as desired otherwise previously written memories are cleared and scan range number appear in the bank name area Push AUTO again to stop the scan
3. FE EO 4A FB FD tt Preamble code PC s address IC R8500 s address OK code End of message code Memory channel contents set amp write 1A 00 COMMAND LIST 10 NG message from IC R8500 to PC FE FE EO 4A FA FD fot pa T 2 8 Ke oO 9 o 3 P o o o o o v 2 5 gg E CB 9 5 ot e 9 on oO g amp 9 Zz ium Bank CH no Frequency Mode so Tuning step ATT SCN Memory name FE FE 4A EO 1A 00 19 0 12 3 9 9 7 8 5 6 3 4 7 2 0 5 0 1 1 3 95 119 1 o 08 4 9 4 3 2 0 5 2 3 8 3 5 3 0 3 0 FD A 4 PN Too Bom oum m 4 g o o s e Ee D D E tels 8 o 2 E 5 o 8 588 95 m 9 0 C do G p 9 2 9 5 ES o 35 D 2 S cgo NINI NI N N ogg 8 8 38 ZPTzszIi ziis 82 2 5 S ro oF o X 8 el alsSi2 9e A gt o O o T O 9 50 9 o 9 9S o5 Octo e i a Og one M amp 9 0 Ed ui Scan skip and select channels The above data packet is an example of programming the following into memory channel 123 of bank num Comment Scan select Scan skip number ber 19 00 OFF OFF Frequency 1 234 567 890 Hz Mode FM 01 OFF Specified e Tuning step 199 5 kHz programmable step 02 Specified OFF Attenuator 10 dB 03 Specified Specified e Scan select specified e Scan skip specified e Memory na
4. TV when receiving TV broadcasts or ATV e Push IN FM TV on the TV R7100 to select FM when receiving FM broadcasts in stereo Set the frequency of the audio center frequency of the desired TV or FM signals by the main dial or di rect keypad entry The FM center indicator on the IC R8500 s function dis play is useful for tuning Pictures appear on your TV screen and sound is emitted TV R7100 specifications General Power supply requirement 9 V negative ground supplied from the IC R8500 Current drain Approx 100 mA when receiving no sig nal e Dimensions 110 W x 35 H x 200 D mm 4 3 W x 1 4 H x 7 9 D in projections not included Weight 750 g 1 7 Ib Headphone jack impedance 32 Q approx TV receiver Video carrier input frequency 15 2 MHz U S A ver sion 16 2 MHz Europe ver sion Audio carrier input frequency 10 7 MHz Audio intermediate frequency 4 5 MHz U S A version 5 5 MHz Europe version e Video output level 1 V p p 75 Q e Audio output level 300 mVrms 47 KQ load U S A version 400 mVrms 47 kQ load Europe version FM receiver Intermediate frequency 10 7 MHz Selectivity 230 kHz 6 dB Audio output level 300 mV 47 kQ e Stereo separation More than 30 dB 1 kHz 40 EN 2 TROUBLESHOOTING 41 The following chart is designed to help you correct problems which are not equipment malfunctions If you are unable to locate the caus
5. V Convenient The same convenient functions are available as de scribed above 1234 567 00 1235 678 00 1235 890 00 1240 050 00 ooo coo ool L AUTO appears 24 25 6 SCANS Q Priority scan Priority scan monitors a specified frequency the pri ority channel once every 1 16 sec programmable during any operation such as receiving scanning other channels etc Preparation priority channel programming Push PRIO for 1 sec appears in da bank name area then changes to a flashing H e Using this method the priority channel can be called up at any time with one push Set the desired frequency mode and memory name Push MW for 1 sec to write the contents into the priority channel Push PRIO again to return to the previous chan nel Start stop Push PRIO to start stop the scan e Priority scan can be used in combination with other scan types start another scan type during priority scan or push PRIO while operating another scan ce Programmed scan with priority scan Priority scan B Mode select function To operate memory scan or memory select scan in a specific mode ignoring other modes the mode select function is available Push MEMO or SEL to start memory scan or memory select scan respectively Sel
6. 100 kHz and 1 MHz are selectable Programmable tuning steps can be set between 0 5 and 199 5 kHz To set programmable tuning steps enter the desired steps via the keypad then push TSA Jor TS V p MAIN DIAL Changes the operating frequency set mode contents etc BRAKE ADJUSTMENT SCREW Adjusts the main dial tension p FUNCTION DISPLAY p 6 Shows the selected frequency mode memory name etc S METER Shows the strength of the received signal we Shows the squelch threshold level when the SQUELCH is rotated past the center position 1 PANEL DESCRIPTION amp MEMORY SET SWITCH M SET p 19 Used to copy and paste the displayed frequency into another memory channel The first push is used to copy appears and the sec ond push is used to paste M disappears Frequency mode tuning step memory name etc can be programmed into a temporary memory MEMORY CLEAR SWITCH M CL p 19 Push and hold to clear the contents of the displayed memory e Bank names cannot be cleared amp MEMORY WRITE SWITCH MW p 19 Push and hold to store the displayed frequency mode tuning step etc into the selected memory channel BANK SWITCH BANK p 17 we Push momentarily to toggle the bank limit func tion ON and OFF p18 While BANK appears only memory channels within the selected bank can be selected via the M CH se lector Push for 1 sec to increase decrease the num
7. Ol oaaL ocs C Juc J JI Select the desired memory channel Q Set the frequency and mode tuning steps then push and hold the MW key When no data is programmed memory names cannot be programmed Push CE gt e NAME eA cursor appears at the first character space of the name area Enter the desired name via the keypad Push the appropriate keys to input the desired charac ters eTo erase a character overwrite with a space using the M CHe 4 key e To move the cursor forwards or backwards use the lt or CE key Push ENT to input the set name appears and o Bank name programming Select the desired bank using M CH BANKA or ENT BANKY Q Push CE gt e NAME eA cursor appears at the first character space of the name area When no data is programmed 15i HE appears the cursor does not appear Program a frequency or change the channel in such cases Push e to move the cursor to the bank name area Enter the desired name via the keypad Use the same method as for channel names see above amp Push ENT to input the set name Z NOTE When using CE on the last digit of the bank name the current name is cleared and the previous one is substituted DO NOT forget to push ENT after the bank name is set BA
8. Push MEMO to return to the previous display The skip function for any scan except priority scan memory channels specified as skip chan nels are not checked during memory scan and select 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 memory write scan The skip function is turned ON automatical ly at scan start SKIP does not function during scan The scan skip function is turned ON and OFF by SKIP regardless of scan start tomatically at scan start BANK does not function during scan The bank limit function is turned ON and OFF by BANK regardless of scan start The bank limit function is turned ON au E Voice scan control function This function is useful when you don t want unmodu lated signals pausing or cancelling a scan When activated the receiver checks received signals for voice components If a receiver signal includes voice components and the tone of the voice components changes within 1 Sec scan pauses or stops If the received signal includes no voice components or the tone of the voice components does not change within 1 sec Scan resumes To toggle the function ON and OFF push VSC VSC appears while it is activated ZY The VSC function activates for any scan The VSC function resumes the scan on unmod ulated signals
9. and auto write scan is started all memories in this bank are cleared 100 memories Undesired 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 frequency is programmed into this bank regardless of the selected bank 20 memories fixed E Bank selection For temporary storage when assigning channels to banks Deleted channels contents have been cleared are stored in this bank until being assigned to another bank This bank does not appear when no channel are assigned 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 and 5 NNSS bank See p 21 To select regular channel banks Push M CH BANKA or ENT BANKY one or more times to select the desired channel bank e The bank indicator shows the selected bank Push and hold BANKA or BANKY to quickly through the channel banks in the order D to NOTE The FREE bank is initially blank and there fore cannot be selected In order to select it at least 1 channel must be programmed into the FREE 1c V Convenient Bank names ming The default names of USR A to USR T can be set to your own preference Refe
10. frequency mode does not change Connect to REMOTE jack Be sure the t tem is turned ON in initial set mode p 32 ll Connecting to a PC The IC R8500 can connect directly to a personal computer providing control of multiple functions such as instant frequency name programming using appropriate software See pgs 35 36 for the control command table RS 232C cable r 3 TXD data output 2 RXD data input 1 3 JE L Personal computer connector A DB9 DB25 adapter may be required depending on the PC s O 0000066966666 O 00000 do0000 25 ne 14 E Data demodulation terminal See p 16 for details regarding connection and opera tion E 3 FREQUENCY SETTING E Read me first The IC R8500 uses memory channels for storage of frequencies as well as mode tuning steps etc When turning power OFF or changing memory chan nels the previously displayed frequency cannot be recalled unless it has been stored into a memory channel Therefore when you want to keep a dis played frequency for later recall you must program it into a memory channel by pushing MW for 1 sec OFFDLY CO BLANK appears in the memory name area until MW is pushed for 1 sec E Using the keypad
11. internal part or connectors on the rear panel of the receiver This will cause electric shock AVOID using or placing the receiver in areas with tem peratures below 10 C 14 F or above 50 C 122 F AVOID placing the receiver in excessively dusty envi ronments or in direct sunlight AVOID placing the receiver against walls or putting anything on top of the receiver This will obstruct heat dissipation RESPECT other people s privacy Information over heard but not intended for you cannot lawfully be used in any way UNPACKING Accessories included with the IC R8500 Qty DAC adapter AD 55A ssssssssseee 1 Q DC power cable OPC 0230 sss 1 Mini plug 2 conductor 3 5d sssssee 1 Phono RCA plugs seeem 2 Fuse FGMB 125 V 3 A internal use 1 Fuses FGB 3 A for DC cable ss 2 Screws M4x 12 for optional MB 23 2 Screws CO 3x8 for optional MB 23 feet 4 Q Allen bolts M5x8 for optional IC MB12 4 Some versions are not supplied with an AC adapter TABLE OF CONTENTS IMPORTAN inean oa enn cutie not rne eines i EXPLICIT DEFINITIONS eeeeeeeeeee i PRECAUTIONS wise cian e ite i UNPACKING esses i TABLE OF CONTENT S oceaniana Ea ii 1 PANEL DESCRIPTION
12. 1 99999 0 25uV 32yV 25yV 2 0 27 99999 0 2 uV 25yV 20yV 28 0 29 99999 0 2 uV 25V 20uvV O05gV 30 0 999 99999 0 32uV 25uV 204V 32ygV O5yuV 1 4 V 1240 0 1300 00000 0 32uV 25uV 204V 32ygV 0 5pV 20 pV Frequency band SSB CW AN N AM AM W FM WFM MHz threshold tight threshold tight threshold tight threshold tight 1 8 29 99999 10 uV 320 mV 0 5 uV 320 mV 0 5 uV 320 mV i990 9900 45 UV 820 mV 0 4 pV 320 mV O 4 uV 320 mV 45 pv 320 mV FM mode can only be used above 28 MHz WFM More than 150 kHz 6 dB FM AM W More than 12 kHz 6 dB FM N AM More than 5 5 kHz 6 dB AM N SSB CW More than 2 2 kHz 6 dB CW narrow More than 500 Hz 6 dB Optional FL 52A is required More than 60 dB 30 1000 MHz 50 dB typical 1240 1300 MHz More than 2 0 W at 10 distortion with an 8 Q load More than 1 2 kHz 2 conductor 3 5 mm 4 8 Q All specifications are subject to change without notice or obligation options 15 NN AH 7000 SUPER WIDEBAND OM NIDIRECTIONAL AN TENNA Frequency coverage Receive 25 1300 MHz Transmit 50 144 430 900 1200 MHz bands Type of antenna Discone Weight 1 kg SP 7 EXTERNAL SPEAKER Suitable for base station operation Input impedance 8 Q Max input power 5 W TV R7100 TV RECEIVE ADAPTER Provides TV broadcast reception and use of your TV set and video recorder Also provides FM st
13. 20 21 5 MEMORY CHANNELS E Assigning channel numbers The 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 to banks to suit your preferences and operating style Deleted channels are stored temporarily in the bank NOTE When shipped from the Taetory or after resetting the receiver s CPU the FREE bank has no memory channels and cannot be selected MS 9 Deleting memory channels To rearrange bank channel assignments Delete memory channels from banks that have more memory channels than you need e Deleted channels are assigned to the free bank auto matically Add or insert memory channels to banks in which you want to add channels Channels added to a bank are deleted from the free bank BEED ool ia COGIC BANk switch M CH control Select the bank and memory channel you wish to delete ae ont for 1 sec appears and teehee ePush BANK momentarily to exit the condition and return to the previous di n if de ired ii FP appears in the display amp Push BANK for 1 sec to delete the selected channel The memory channel but not its contents is moved to bank Z Memory channels can only be deleted one at a time to prevent accide
14. 5 Push the numeral keys on the keypad to enter the MHz digits for the desired frequency elf a key is mistakenly pushed push CE and start again from the beginning When entering the same MHz digits as the displayed frequency this step can be skipped Push e cao Push MW for 1 sec after tuning v Convenient Use M SET to program a displayed frequency and its mode etc without overwriting the currently select ed memory See p 19 Push the numeral keys to enter the frequency digits below 1 MHz elf a key is mistakenly pushed push CE gt and start again from the beginning Push ENT to set the input frequency When pushing ENT after entering the MHz digits zeros are automatically entered for the kHz digits EXAMPLE SETTING THE FREQUENCY USING THE KEYPAD To set to 145 00 MHz 4 sm cw WEE To set to 1296 040 MHz ENT 9 6 m 0 gt gt e To set to 850 kHz ENT 0 85 MHz 6 Je CTT TOAT ri ri nc FUP OF CO LLII Lt LI It LACIE Lie To change from 1296 040 ENT to 1296 850 MHz E Using the main dial Rotate the main dial to change the frequency The frequency changes in increments determined by the selected tuning step see below When the lock function is activated LOCK appears
15. Setting frequency displayed freq Desired freq Center of Mark and Space freq W narrow mode Setting frequency displayed freq Desired freq Center of Mark and Space freq 600 Hz r SB mode for amateur RTTY Setting frequency displayed freq Desired freq Mark freq TLL QO Q 16 E 5 MEMORY CHANNELS B General The IC R8500 has 1000 regular memory channels plus 20 programmable scan edge channels and 1 pri ority channel 8 digit memory names are programmed into all 1000 channels and 5 digit bank names are programmed into 20 user banks for convenient recall and organisation of frequencies Moreover memory channels can store mode information a tuning step NOTE When memory channels without informa tion blank channels are selected the frequency is not displayed Only the memory channel num ber appears ANS 4 2 e table below gives a general overview of the R8500 s memory channels O and ATT attenuation information USAGE For normal use Frequency mode tuning step name and ATT information can be programmed The number of channels in each bank is user assignable Banks cannot be deleted they must contain at least 1 channel i 100 memories Frequencies detected during auto memory write scan are memorised into this bank in sequence Mode and tuning step are written at the same time Note that when the written memories condition is set as
16. displayed frequency is automatically moved to the center frequency E Functions for SSB CW IF shift The F 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 Adjust the SHIFT control for a minimum interfer ence signal level The audio tone may be changed while the IF shift is in use Set the shift control to its center position when there is no interference APF F SHIFT APF F SHIFT APF 9 IF SHIFT Shifts low Center Shifts high 14 15 4 RECEIVE FUNCTIONS Noise blanker The noise blanker reduces pulse type noise such as that generated by automobile ignition systems This function is not effective for FM and WFM mode or for non 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 the noise blanker is ON the output audio may be dis torted In such cases the noise blanker should be turned OFF MA v Audio peak filter NB AFC switch The APF audio peak filter adjusts the peak fre quency of the received audio The APF can be used for adjusting the audio response The IC R8500 has two selectable width filters Use the appropriate filter width for opti
17. even when the resume condition is set to OFF or CO SN VSC appears VSC OFFDLY co Unmodulated Modulated signal signal Scan edge 1 Scan edge 2 Scan Xo Scan pauses or is Skip cancelled 26 6 SCANS ll Programming scan edge frequencies A set of scan edge frequencies must be programmed before starting the programmed or auto memory write scans 10 pairs of scan edges are available OP1 to 9P2 Push PROG for 1 sec e appears in changes to a flashing Q Rotate the M CH selector to select the lower scan edge in a pair e g OP1 The keypad can also be used for selection Q Set the frequency mode tuning step and memory name then push MW for 1 sec to program one of the scan edges Rotate the M CH selector to select the other edge in the pair e g OP2 Set the frequency then push MW for 1 sec to program Mode tuning step and name are common to both scan edges Push PROG momentarily to return to the previous channel or repeat to for other scan edges bank name area then cag E Scan speed delay functions Scan resume condition Scan pauses when finding a signal and then resumes or is cancelled depending on the selected scan resume condition There are 3 resume conditions Push DLY one or more times to select a resume condition Scan resume
18. functioning try to find the source of the problem and replace the dam aged fuse with a new rated fuse For DC cable fuse e For internal fuse m EY Tis Fuse MAIN unit FGMB 125 V 3 A E Level adjustments R254 r L R252 adjusts the beep level R254 adjusts the UT 102 output level fo Wy 37 E Memory backup All of the CPU s 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 B CPU resetting If the IC R8500 is behaving erratically this may be an indication of a CPU malfunction In such cases reset the CPU While pushing MW push POWER in to turn on the receiver power The CPU is reset ZZ NOTE Resetting the CPU clears all memory con Z Y tents and returns internal settings to their factory Z4 defaults ll Cleaning If the receiver becomes dusty or dirty wipe it clean with a dry soft cloth AVOID the use of strong chemical solvents such as a thinner benzine or alcohol to clean the ce receiver These may damage the receiver s surfaces BIUT 102 voicE SYNTHESIZER UNIT The UT 102 announces the accessed frequency in a clear electronically generated voice in English or Japanese when pushing SPCH or when a signal is detect
19. ring aj emm down Strip the cable I jacket and soft solder Coupling ring 10 mm soft solder Q 10mm Soft Strip the cable as k gt solder shown at left Soft solder the center con ductor ice 1 2 mm 10 mm 36in Slide the connector body on and solder it solder solder Screw the coupling ring etu onto the connector body E Tape recorder connections CONNECTIONS 2 The REC OUT jack has 350 mV rms 4 7 KQ output for connection to other audio equipment rs IC R8500 REC c REMOTE gt p m LIIIN eres Ren Ceo AUX IN or LIVE IN jack REC REMOTE jack Grounds when a signal is received and squelch opens If a tape recorder has a control terminal this jack can be used for record ing control 2 A DC max REC OUT 350 mVrms 4 7 KQ v Convenient When an optional UT 102 voicE SYNTHESIZER UNIT is installed detected frequencies during scanning can be recorded See pgs 31 32 for settings E Transceive function Icom CI V transceivers or receivers can be connect ed via the REMOTE jack The frequency and mode become the same when either radio is changed jo 60 Mlun o When a set frequency is out of range for one of the con nected transceivers or receivers the connected radio s
20. the active connector as follows Push SLEEP 48 for 1 sec to enter quick set mode Rotate the M CH selector to select the HF item Rotate the main dial to select the antenna connector Push SLEEP 48 momentarily to exit quick set mode E Grounding Z WARNING NEVER use a gas pipe or electri cal conduit pipe for grounding To prevent accidents involving electricity and interfer ence from transceivers ground the receiver through the GND terminal on the rear panel For best results connect a heavy gauge cable to a water pipe or long earth sunk copper rod Make the distance between the GND terminal and ground as short as possible TYPE N CONNECTOR INSTALLATION EXAMPLE Nut Rubber gasket ECL Slide the nut washer rubber gasket and clamp over the Cl Wash m coaxial cable then cut the end of the cable evenly 3 mm 6 mm Strip the cable and fold the braid back over the clamp Center conductor 10 mm in 9 Solder hole Soft solder the center conductor Install the X center conductor pin and No space solder it amp Carefully slide the plug Plug body EC a 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 PL 259 CONNECTOR INSTALLATION EXAMPLE jese mm Slide the coupling
21. the frequency cannot be changed 9 Selecting a tuning step 13 preset tuning steps are available plus 1 programma ble tuning step see below The presettuning steps are 10 50 100Hz 1 25 5 9 10 125 20 25 1 MHz Push TSA or TSW to change the selected tuning step 100 kHz 9 Setting the programmable tuning step The programmable tuning step can be set between the range of 0 5 199 5 kHz in 0 5 kHz steps for each memory independently Push the numeral keys on the keypad that corre spond to the tuning step you wish to program Q Push TSA or TSW to set the programmable tun ing step to the selected value The programmable tuning step is automatically selected as the active tuning step FREQUENCY SETTING 3 Tuning Siok Li indicators MHz kHz G appears when the programmable tuning step is selected MHz or kHz appears to indicate the units of the selected tuning step 6 0 EXAMPLE Setting the programmable tuning step to 50 kHz tsa or sv n j E xd EX kHz E Lock function The 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 lock function is activated 9 Setting the lock function covera
22. transceive function Also connects to a PC with several receivers for command control via an optional CT 17 ci v LEVEL CONVERTER OIF OUT JACK p 40 Outputs a 10 7 MHz IF signal with 9 V DC for an op tional TV R7100 Tv RECEIVE ADAPTER QAGC JACK pgs 16 40 This jack has functions which are selectable through internal receiver settings Outputs an AGC signal for an optional TV R7100 rv RE CEIVE ADAPTER default Outputs audio detected signal without de emphasis for 9600 bps data detection FM mode only G DC 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 not connected Not supplied with some versions EXTERNAL SPEAKER JACK Connects an 8 Q external speaker When an external speaker is connected the internal speaker does not function DC 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 DC 13 8 V jack Not supplied with some versions Q HF 50 ANTENNA CONNECTOR p 8 Connects an antenna to cover the frequency range below 30 MHz Use a coaxial cable and a PL 259 connector Be sure this connector is selected in quick set mode p 31 GROUND TERMINAL p 9 Connect this terminal to a ground OHF 500 Q ANTENNA CONNECTO
23. via the M CH selector SZ main dial Scan delay is assigned to the DELAY SPEED control o Scan speed When scan speed is assigned to the DELAY SPEED control see above the scan speed can be instantly updated during scan operation The name area shows as at right for 1 sec after rotating the control Z When scan delay time is assigned to the f DELAY SPEED control the scan speed is fixed ZZ at the maximum of 40 ch sec WVV DELAY SPEED ALIIS Highest scan speed 40 ch sec Scan delay The DELAY SPEED control adjusts the scan delay period 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 with the DLY PA switch S Z When scan speed is assigned to the 7 DELAY SPEED control the scan delay is deter DELAY SPEED tom Shortest delay time 3 sec Longest delay time 18 sec Y mined by the set value of 3 to 18 sec im D 28 EN 29 SLEEP TIMER The IC R8500 has a sleep timer function to automati cally turn the power OFF after a specified period Operation Push SLEEP 48 momentarily several times to activate the sleep timer and set the power OFF period When the sleep timer is activated SLEEP appears in the display 5 settings are available 120 90 60 30 min and sleep OFF Q2 sec after pe
24. write scan into the selected scanning group scan edge channels or select a different does not function programmed scan group Memory scan does not All channels are specified as SKIP Turn OFF the automatic skip function or pgs function channels in the selected bank release the SKIP setting for 2 or more 25 26 z channels in the selected bank 4 No memory channels have yet been Program 2 or more channels in the se p 19 2 programmed in the selected bank lected bank Select memory scan Two or more SEL CH are not specified e Set 2 or more channels as SEL CH in p 23 does not function in the selected bank the selected bank Auto memory write All channels in the auto memory bank Erase some or all of the channels in the p 24 scan does not function have been programmed auto write bank Scan starts automati e The AFC function is activated and an Push AFC to turn the AFC function p 14 42 EN 4 SPECIFICATIONS 43 E General e Frequency coverage Mode e Number of memory channels Antenna connector e Usable temperature range Frequency stability Power supply requirement e Current drain at 13 8 V DC Dimensions projections not included Weight e Intermediate frequencies E Receiver Receive system e Sensitivity e Squelch sensitivity e Selectivity e Spurious and image rejection ratio e Audio output power F shift variable range
25. 17 Shows the selected memory channel number SKIP CHANNEL INDICATOR p 25 Appears when the selected memory channel is set as a skip channel MEMORY NAME INDICATORS p 20 Display names programmed into a memory or scan group PANEL DESCRIPTION 1 SELECT CHANNEL INDICATOR p 23 Appears when the selected memory channel is set as a select channel BANK NUMBER INDICATOR p 17 Shows the selected memory bank number BANK INDICATOR p 18 Appears when the bank limit function is activated e Flashes during scan when the bank limit function is activated by the auto bank function BANK NAME INDICATOR p 20 Displays names programmed into a bank AUDIO PEAK FILTER INDICATOR p 15 APF or APF N appears when the audio peak fil ter function is activated ATTENUATOR INDICATORS Appear when the RF attenuator is activated AUTOMATIC GAIN CONTROL INDICATOR p 15 AGC F appears when AGC fast is selected no indi cation appears when AGC slow is selected RECEIVE INDICATOR Appears while receiving FM CENTER INDICATORS p 14 Appear when the received signal is not tuned to its center frequency NOISE BLANKER INDICATOR p 15 Appears when the noise blanker circuit is activated AFC INDICATOR p 14 Appears when the automatic frequency control function is activated in either FM or WFM modes amp LOCK INDICATOR p 12 Appears when the main dial or front panel switches are
26. BANK CO for 1 sec 22 6 SCANS ll Operation Memory scan All memory channels except skip channels in the selected bank are scanned at up to 40 ch sec Push M CH BANKA or ENT BANKY to select the desired bank Direct selection is also available as below Q Set the SQUELCH control to the threshold point Push MEMO to start the scan FEP appears in the bank name area e Push MEMO again to stop the scan V Convenient Direct bank selection Memory scan can be started in a specific bank without using BANKA Y x Enter one or two digits for the bank number then push MEMO Bank selection during memory scan The selected bank can be changed without stopping the scan x Enter one or two digits for the bank number then push ENT Bank limit and skip scan release When starting memory scan the bank limit and channel skip functions are activated automatically Refer to p 26 Select Select alae c3 ooo Goo coc MEMO appears Memory select scan Memory select scan allows you to increase scan effi ciency by searching for specified channels only thereby increasing the rate at which the scan cycles through the memory channels Set high priority chan nels as select channels memory select scan searches for signals on these chann
27. External speaker connector Standby 1 8 A 287 W x 112 H x309 D mm 1194e W x4 32 H x 12 6 D in 7 0 kg 15 4 Ib Below 30 MHz Version Frequency Coverage MHz USA 0 10000 823 99999 849 00001 868 99999 894 00001 1999 99999 Europe 0 10000 1999 99999 France 0 10000 87 50000 108 00000 1999 99999 Specifications guaranteed 0 1 1000 MHz and 1240 1300 MHz Optional FL 52A is required 1000 plus 20 scan edges and 1 priority channel Below 30 MHz SO 239 50 Q Phono 500 Q Above 30 MHz Type N 50 Q 10 C to 50 C 14 F to 122 F Below 30 MHz 100 Hz x20 Hz Above 30 MHz 0 0003 0 00006 When an optional CR 293 is installed 13 8 V DC 15 negative ground 117 V AC U S A version with supplied AD 55A 230 or 240 V AC other versions with the optional AD 55 V Max audio 2 0 A FM normal narrow AM wide normal narrow SSB USB LSB CW normal narrow WFM Frequency band 1st 2nd 3rd Unit MHz 0 1 29 99999 48 8 10 7 0 455 30 0 499 99999 778 7 10 7 0 455 500 0 1024 99999 266 7 10 7 0 455 Utilizes converter method 1025 0 1999 99999 cal freq 500 1000 or 1010 MHz Except WFM Superheterodyne Frequency band MHz SSB CW AM AM N AM W FM WFM 0 1 0 49999 1 0 pV 6 3 uV 0 5 1 79999 20yV 13 0 pV 1 8
28. ION normal 12 kHz 6 dB T E Amateur bands citizens band utility communications marine bands FM etc FM narrow can only receive narrow FM signals normal FM can narrow 5 5 kHz 6 dB E i receive both normal and narrow FM signals medium 5 5 kHz 6 dB Broadcasting amateur bands citizens band air band etc AM wide wide 12 kHz 6 dB ry mode is used for clear audio reception Signals however may be received with interference narrow 2 2 kHz 6 dB USB uo Hye 2 2 kHz 6 dB i Shortwave broadcasting amateur bands etc Use USB for normal LSB SSB reception LSB is not normally used nomal 22 kHz 6 dB Morse code communications Use this mode to receive radio tele narrow 500 Hz 6 dB x type etc by shifting the receive frequency option ie i z TV broadcasting FM broadcasting etc TV and FM broadcasting 150 kHz 6 dB z X cannot be accessed in FM mode because their signals are too wide 13 ll Squelch function RECEIVE FUNCTIONS 4 The IC R8500 has 2 types of squelch noise squelch and 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 always cause the squelch to open S meter squelch S meter squelch does not open for weak signals but can be adjusted to open for signals over a wide range of strengths Once you ha
29. O lee INSTRUCTION MANUAL COMMUNICATIONS RECEIVER IC CH8500 Icom Inc IMPORTANT EXPLICIT DEFINITIONS READ THIS INSTRUCTION MANUAL CAREFULLY before attempting to operate the receiver SAVE THIS INSTRUCTION MANUAL This instruction manual contains important safety and oper ating instructions for the IC R8500 PRECAUTIONS WORD DEFINITION Personal injury fire hazard or electric AWARNING shock may occur CAUTION Equipment damage may occur NOTE If disregarded inconvenience only No risk of personal injury fire or electric shock The IC R8500 complies with essential require C ments of the 89 336 EEC directive for Electromagnetic Compatibility This compliance is based on conformity with the ETSI specification prETS300 684 EMC product standard for Commercially Available Amateur Radio Equipment ZA INDOOR USE ONLY NEVER expose the IC R8500 or AC adapter to rain snow or any liquids Z NEVER connect the receiver to an AC outlet directly This may pose a fire hazard or result in an electric shock Always use the supplied AC adapter or connect to a 13 8 V DC power source Z NEVER connect to an AC outlet that exceeds the suggested voltage for each AC adapter version This could cause a fire or ruin the AC adapter and or receiver Z NEVER use non rated fuses Non rated fuses could cause a fire or ruin the receiver NEVER let metal wire or other objects touch any
30. OFF Scan pauses until signal disap OFF DLY co pears then resumes 3 sec after that e Scan resume ON with adjusted delay period OFF DLY CO Scan pauses for the adjusted delay period after receiving a signal then resumes When the received signal disappears scan resumes approx 3 sec after that Scan cancel Scan is cancelled when a signal is found during scan OFF DLY co H IDLY WEI switch Signal Signal receiving a signal no signal Scan UUUUUU hee scanning pausing i gt Scanning 3 sec Signal nosignal receiving a signal no signal Scan UU 0 0 0 pausing 9000000000000 scanning 4 y scanning delay time Signal signal receiving a signal no signal Scan 06000000 scan is cancelled scanning 27 scans 6 Assigning a function to the DELAY SPEED control The function of the DELAY SPEED control is selec table as shown below to suit your operating style Push DLY PA for 1 sec to enter the setting con dition Q Rotate the main dial to select the function for the DELAY SPEED control When the scan speed is assigned to the DELAY SPEED control the scan ded time is determined while i appears Rotate the M CH selector to set the delay time Push DLY PMA to return to the previous display Scan speed is assigned to the DELAY SPEED control Adjustable A Toggle via the
31. R p 8 When a 500 Q long wire antenna is used for HF band receiving this connector is used instead of the 50 Q antenna connector Set the HF T item to p 31 VHF UHF ANTENNA CONNECTOR p 8 Connects an antenna to cover the frequency range over 30 MHz Use a coaxial cable and type N connector to use this connector E Function display 3 WFMAMUSBLSB sum I Lll e a i i af REMOTE INDICATOR p 35 Appears when a level control command is received from a PC via CI V data When this indicator appears the control knob s setting is ignored e This indicator will disappear when the control knob is rotated MODE INDICATORS p 13 Show the operating mode FREQUENCY READOUT Shows the operating frequency OSKIP 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 VSC INDICATOR p 26 Appears when the voice scan control function is activated Q SCAN RESUME CONDITION INDICATORS p 27 Show the selected scan resume condition O TUNING STEP INDICATORS p 12 Show the selected tuning step 3 appears when a programmable tuning step is selected TEMPORARY 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 MEMORY CHANNEL READOUT p
32. al to select items and contents respectively RECORDER REMOTE JACK REC REMOTE p 10 Controls the running of a tape recorder for record ing Connects to the REMOTE jack on a tape recorder RECORDER JACK REC OUT p 10 Outputs an audio signal Connect to the AUX or LINE IN jack on a tape recorder HEADPHONE JACK PHONES Accepts headphones with 4 16 impedance e When headphones are connected no receive audio comes from the speaker e Stereo headphones can be connected however output is monaural MODE 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 OW USB LSB CW optional CW narrow we When SSB CW mode is selected push SSB CW for 1 sec to adjust the BFO frequency p 15 l LOS MO Vl LUN e oe NBAFC AGC F APF N 4E 10 ATT 20 i eo E REC OUT DICE Eee NEP EAE Sie BER E eee o 6 ENB AFC C Acc ms 9 eac L ase Ji roa J 20dB PHONES AF GAIN SQUELCH APF IF SH T ZI alone JI ju 00 e NOISE 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 noise when SSB CW or AM mode is selected p 15 The automatic frequen
33. are activated automatically when AUTO is selected and scan is started SEL p 23 we Push momentarily to start stop memory select scan w 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 specified scan edge group 10 scan edge groups are available SCAN we Push for 1 sec to program scan edges for pro grammed scan SKIP p 25 w Push momentarily to toggle the skip function ON and OFF for any scan Automatic skip activation is available with the MEMO Switch we Push for 1 sec to set the memory channel as a skip channel AUTO p 24 w 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 ON and 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 is activated PRIO p 25 w Push momentarily to start stop priority scan Priority scan can be used in combination with other scans Push for 1 sec to enter the priority channel pro gramming co
34. ber of memory channels in the selected bank p 21 MEMORY CHANNEL SELECTOR M CH p 18 Selects a memory channel in normal use Clockwise rotation selects higher memory channel numbers counterclockwise rotation selects lower memory channel numbers Selects a set mode item when quick set mode or initial set mode is selected p 30 DELAY SPEED CONTROL DELAY SPEED p 28 Adjusts the scan delay time or scan speed depend IC R8500 COMMUNICATION RECEIVER MODE Cum JC JOC a Jew Camry ase JI Jr APC 9 IF SHIFT arp ALT m Wo f S oH He A Lj x e NA S Sos AF GAIN SQUELCH Q ing on the DLY mA switch setting When scan delay time is assigned this control adjusts the scan delay time scan pausing interval during signal reception This setting is effective when OFFDLY co is selected for the scan resume condition When scan speed is assigned this control adjusts the scan speed In this case scan delay time is determined while setting SCAN SWITCHES SCAN Rena All of these switches are related to the scan function in 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 functions
35. cy 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 AUDIO FREQUENCY GAIN CONTROL AF GAIN p 13 Rotate clockwise to increase the audio output rotate counterclockwise to decrease the audio output AUTOMATIC 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 9 SQUELCH CONTROL SQUELCH p 14 Varies the squelch threshold level to mute noise when receiving no signal FC S meter squelch p p threshold p Noise squelch Signals below the e S meter level threshold not PARADE available in SSB gt CW WFM and AM narrow modes IF SHIFT CONTROL IF SHIFT p 14 Shifts the center frequency of the receiver s IF pass band to reject interfering signals Cannot be used in FM WFM and AM modes OFFDLY Co Center frequency is shifted up Center frequency is shifted down AUDIO 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 P ATTENUATOR SWITCHES 10dB 20dB Push to activate one of the attenuators Push 10dB
36. d with the IC R8500 when attaching the MB 23 RA A Bl Required connections IC R8500 Computer control p 10 SNNT Ws Mens TV adapter or high speed data connection pgs 16 40 External speaker p 44 SS f VHF UHF wide band antenna i S The optional AH 7000 is available for 25 MHz to 1 3 GHz coverage 30 MHz 2 GHz coverage i wire antenna eee MHz coverage CONNECTIONS 2 Supplied DC power cable either power Unplug the jumper plug source Rd the DC13 8V jack AC adapter AD 55 A V e The jumper plug must be connected to the DC 13 8V jack J Ground connection p 9 HF antenna J Mere MHz coverage P Select the active antenna connector in quick set mode p 31 2 CONNECTIONS B Antenna connection Antennas play a very important role in receiver opera tion Connecting a poor quality antenna to the IC 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 for 30 to 2000 MHz 9 Using a long wire antenna for HF bands The IC R8500 has a 500 Q phono RCA antenna connector for the HF bands When using a long wire antenna instead of a 50 O matched antenna use one as long as possible at least 10 m 33 ft and select
37. dial normally changes the frequency 400 x tuning step revolution When auto tuning speed is turned on this increases to 2000 x tuning step revolution during quick rotation of the dial The auto tuning speed function is ON default The auto tuning speed function is OFF This item sets the active HF antenna connector on the rear panel Either the 50 Q SO 239 coaxial or 500 Q phono RCA connector can be activated The SO 239 antenna con nector is activated default The RCA phono connector is activated E initial set mode items This item activates deactivates the REC REMOTE jack on the front panel When ON is selected the REC REMOTE jack is at a low level when the squelch opens via the internal relay The REC REMOTE jack can be used default The REC REMOTE jack has no function and no relay switching sound is heard When the optional UT 102 voicE SYNTHESIZER iS installed and scan is in use the detected frequency is announced each time scan pauses regardless of the SPCH LOCK switch This announcement can be turned ON and OFF The detected frequency is announced when scan pauses default The optional voice synthe sizer activates via the SPCH switch only sETMODE 8 When the optional UT 102 voicE SYNTHESIZER UNIT iS installed you can select between English and Japanese as the language Voice synthesizer funct
38. e memory editing 19 i Clearing ice rU rie 19 E Channel bank names seee 20 E Assigning channels numbers neee 21 6 SCANS ui eto epe eae evi hal 23 28 Bl Operation diete SEE 23 Mi Mode select function sseeeeeeee 25 E Specifying skip channel and frequency 25 E Automatic bank limit skip functions 26 W Voice scan control function eeren 26 E Programming scan edge frequencies 27 il Scan speed delay functions ssssss 27 7 SLEEP TIMER ccce tincnt 29 8 SET MODE E Quick set mode items E initial set mode items 9 CONNECTOR INFORMATION 10 CONTROL COMMANDS E Command table 11 MAINTENANCE E Fuse replacement E Level adjustments E Memory backup I CPU resetting 12 OPTIONAL INSTALLATIONS BIUT 102 VOICE SYNTHESIZER UNIT MFL 52A Cw NARROW FILTER lI CR 293 HIGH STABILITY CRYSTAL UNIT E TV R7100 rv RECEIVE ADAPTER 13 TROUBLESHOOTING 14 SPECIFICATIONS Em PANEL DESCRIPTION E Front panel 9 POWER SWITCH POWER Turns power ON and OFF O SLEEP SET SWITCH SLEEP SET w Push momentarily to set the sleep timer p 29 e Selectable times are 30 60 90 120 min or OFF SLEEP appears in the function display when the sleep timer is set Push for 1 sec to enter quick set mode p 30 Use the M CH selector and main di
39. e of a problem or solve it through the use of this chart contact your nearest Icom Dealer or Service Center PROBLEM POSSIBLE CAUSE SOLUTION REF Power does not turn DC power cable is improperly con e Reconnect the DC power cable se p 8 ON when POWER is nected curely pushed in A fuse is blown Check for the cause then replace the p 37 fuse with a spare one e During AC adapter operation the Connect the jumper connector to the p 8 m jumper connector is not in use DC13 8V jack on the receiver s rear panel z e External 12 V DC is connected to the e Connect the external power source to p 8 o DC IN jack the DC13 8V jack The DC IN jack ac cepts an AC adapter AD 55 A V only Receiver turns OFF by The sleep timer has been activated Turn power back ON then push p 29 itself SLEEP one or more times to turn the sleep timer function OFF if desired No sound comes from Volume level is too low e Rotate AF GAIN clockwise to obtain a the speaker suitable listening level The squelch is closed Rotate SSQUELCH counterclockwise to p 14 open the squelch An external speaker or headphones are e Disconnect the external speaker or connected headphones CW narrow mode is selected when no Select another mode or install the op pgs optional filter is installed tional CW narrow filter 13 38 is Sensitivity is l
40. ect the desired mode to operate the scan in via the mode switches The mode select function is applied to memory or mem ory select scan Push MEMO or SEL again to stop the scan Select WFM Select E Specifying skip channel and frequency e Specifying skip channels Select the memory channel to be specified as a skip channel Q Push SKIP for 1 sec to toggle the setting ON and OFF SKIP CH appears when skip is set e Programming skip frequencies for programmed scan Start programmed scan Q When the scan pauses on an undesired signal push MW for 1 sec The frequency is memorised into the skip bank as a skip frequency The specified channel is skipped during memory and memory select scans The programmed frequency is skipped during pro grammed and auto memory write scans Push MW for 1 sec while programmed scan pauses scans 6 E Automatic bank limit skip functions When starting a scan the following functions are automatically turned ON by default and the SKIP and BANK switches are deactivated during scan e The bank limit function for memory scan and select memory scan The memory scan operates within the selected bank only Turning OFF the automatic function Push MEMO for 1 sec A display as at right appears Q Rotate the M CH selector to Select the item or Rotate the main dial to select mg function i Lior amp
41. ed during scan see p 31 32 for settings Remove the top cover as shown opposite Q Remove the protected paper attached to the bot tom of the UT 102 to expose the adhesive strip Connect the UT 102 as shown in the diagram at right Replace the top cover Under the top cover FL 52A cw NARROW FILTER The IC R8500 has a CW narrow mode which pro vides better S N signal to noise and also rejects nearby interference The CW narrow filter is helpful when receiving CW and radio teletype signals Remove the top cover as shown opposite Q Connect 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 you want to install the filter more securely open the MAIN unit then use the nuts on the bottom of the MAIN unit Replace the top cover Under the top cover OPTIONAL INSTALLATIONS 12 EE 38 12 OPTIONAL INSTALLATIONS E CR 293 HIGH STABILITY CRYSTAL UNIT A temperature compensating crystal with a stability of x3 ppm is built in to the receiver For more demand ing operation the CR 293 HIGH STABILITY CRYSTAL UNIT is available It has a stability of 0 5 ppm Remove the bottom cover as shown
42. efault 4 bytes 32 E 33 RS 232C socket o Remote jack Outer Inner 3 5 mm diam 2 conductor IF OUT jack L Inner Outer RCA phono jack AGC OUT jack k Inner Outer RCA phono jack External speaker Outer Inner 3 5 mm diam 2 conductor CONNECTOR INFORMATION Pin Port name Description 1 GND Grounded 2 RXD Input port for CI V format data 12V 12V 3 TXD Output port for CI V format data 12V 12V 4 RTS Shorten these ports inside Can be connected to pin 8 DCD via the inter 5 CTS PUE E nal circuit board coffee beans NC can be connected to pin 20 DTR via the 6 DSR EU internal 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 9 19 NC No connection NC can be connected to pin 6 DSR via the 20 DTR me i internal circuit board coffee beans 21 25 NC No connection Pin Port name Description Inner REMOTE Input output port for CI V format data 5 V O V Outer GND Grounded Pin Port name Description Frequency 10 7 MHz Inner IF OUT Output level 60 dBm with 50 dBm input from an antenna connector in WFM mode Outer GND Grounded Pin Port name Description Output voltage 1 t
43. els while leaving out lower priority channels Preparation specifying select channels Select the channel you want to specify as a select channel then push SEL for 1 sec Start stop Select the desired bank using M CH BANKA or ENT BANKY Set the squelch control to the threshold point Pu h SEL momentarily to start scan i appears in the bank name area Push SEL again to stop the scan Y NOTE Memory select scan does not start unless 2 or more channels in the bank are specified as select channels SN V Convenient The same convenient functions are available as de scribed above Select ooo oog ooo cool ooo Cora Cora SEL appears 23 o Programmed scan scANS 6 Programmed scan and auto memory write scan searches for signals within a specified frequency range using the selected tuning step increments The result is like an automatic rotating of the main dial Preparation setting the scan range Push and hold PROG to enter the prog bank then input the desired edge frequencies mode and tuning steps Refer to p 27 for details Start stop Set the SQUELCH control to the threshold point Push PROG to start the scan 3 and scan range number appears in the bank name area Push PROG again to stop the scan
44. ereo broadcast reception Does not comply with EMC directive SP 21 EXTERNAL SPEAKER Designed for base station operation Input impedance 8 Q Max input power 5 W MB 23 CARRYING HANDLE Carrying handle convenient for portable operation Use the screws supplied with the IC R8500 DO NOT use the screws supplied with the MB 23 IC MB12 MOBILE MOUNTING BRACKET Receiver mounting bracket for mobile operation CT 17 CI V LEVEL CONVERTER For remote control of up to 4 receivers from 1 PC You can set memory contents including names as well as read data from the receivers CR 293 HIGH STABILITY CRYSTAL UNIT Provides improved frequency stability e Frequency stability 5 ppm 0 C 60 C 32 F 140 F FL 52A CW NARROW FILTER 455 kHz 500Hz 6 dB UT 102 VOICE SYNTHESIZER UNIT AD 55 A V AC ADAPTER Provides AC operation C AD 55 Europe version only 44 Count on us A 5395Y 1EX O Icom Inc Printed in J m m Dd righi P Edeent nc 1 1 32 Kamiminami Hirano ku Osaka 547 0003 Japan
45. etected audio output i DET 100 300 mV rms 4 7 kQ Outer GND Grounded Pin Port name Description Inner Audio Outputs audio Middle Output impedance 4 16 Q Outer GND Grounded 34 EN 10 cCOoNTROL COMMANDS 35 The IC R8500 can be connected to a PC via the PC s from the PC and or transfer data from the receiver to RS 232C port This allows you to control the receiver the PC ll Command table Operation Cn Sc Remark Operation Cn Sc Remark Reading freq edges 02 10 Hz 00 Reading operating freq 03 50 Hz 01 Reading operating mode 04 100 Hz 02 Reading M ch contents package 1A 01 Jadd bn mc 1 kHz 03 Reading bank name 1A 03 Jadd bn 2 5 kHz 04 Reading squelch condition 15 01 5 kHz 05 Reading S meter level 02 9 kHz 06 Reading model ID 19 00 Tuning step 10 kHz 10 07 Set frequency 05 add fd 12 5 kHz 08 LSB 0001 20 kHz 09 USB 0101 25 kHz 10 AM pede 100 kHz 11 AM narrow 0201 Set operating AM wide 0203 1 MHz 12 mode Cw m 0301 programmable 13 CW narrow 0302 OFF 00 FM 0501 Attenuator 1006 11 10 FM narrow 0502 20 dB 20 WFM 0601 30 dB 30 Memory channel selection 08 mc Voice frequency 13 00 Bank selection 08 AO bn synthesizer Memory write 09 AF gain setting 01 add gd Set M ch contents amp write package 1A 00 add dt Squelch level setting 14 03 add gd Set bank name 1A 02 add bn nd IF shift setting 04 add gd Mem
46. ge The lock function can be set to lock the main dial only or the main dial and most of the front panel switches D Push SLEEP Eis for 1 sec to enter quick set mode Q Rotate the M CH selector to select the i indication Rotate ine main dial to sel the lock function cover age to Push SLEEP GSB omental to exit quick set mode 12 EN 4 RECEIVE FUNCTIONS E initial settings Before turning power ON set controls and switches as indicated below E L JL UOUO 000 D i L gt UU 0000 AF GAIN 10 o clock xe yi j 00 0 oo Vi M SQUELCH max CCW APF center IF SHIFT center After turning power ON check the display for indications below and remove as follows Push SLEEP a e 474 Ei Push and hold d d SPCH LOCK gt cock U If Li oe NB AFC AGC F APF N Gay 10 ATT 20 OFF DLY CO DEPT r vt LI Push NB AFC Push AGC Push 10dB and or 20 dB B Mode selection Push one of the mode keys one or more times to The indications in the table appear in the bank name select the desired mode Consult the table below for area for 1 sec after an operating mode is selected basic characteristics of each mode MODE BANDWIDTH INDICATIO DESCRIPT
47. he selected item Repeat steps and to set other items amp To exit initial set mode push POWER to turn power OFF Push POWER to turn power ON again e The conditions selected in initial set mode are now effec tive sETMopbE 8 NN Main dial for contents Cou ay SLEEP ap M CH push for 1 sec for items DISPLAY EXAMPLE QUICK SET MODE OFF DLY CO Value or Item condition Item number POWER Main dial for contents SLEEP GIAg at power ON M CH for items DISPLAY EXAMPLE INITIAL SET MODE Value or Item condition Item number 30 31 8 sETMODE E Quick set mode items This item toggles the intensity of the display back lighting between high or low Bright backlighting default Dark backlighting A beep sounds each time a switch is pushed for con firmation This function can be turned OFF for silent operation Confirmation beeps ON default Confirmation beeps OFF This item sets the lock function to electronically lock the main dial only or both the main dial and the panel Switches Only the main dial can be locked default Both the main dial and panel Switches can be locked This item sets the auto tuning speed The main
48. ions Voice synthesizer functions in English default in Japanese When the optional UT 102 voicE SYNTHESIZER UNIT iS installed you can select between faster or slower synthesizer output Voice sire output is slower Voice synthesizer output is faster default To distinguish equipment each CI V transceiver receiv er has its own Icom standard address in hexadecimal code The IC R8500 s address is 4AH When 2 or more IC R8500 s are connected to an optional CT 17 ci v LEVEL CONVERTER rotate the main dial to select a different address for each IC R8500 in the range 01H to 7FH Address set to 4AH Address set to 01H default This item sets the data transfer rate When is selected baud rate is automatically set amp ctording to the connected controller or other Icom CI V radio Transceive operation is possible with the IC R8500 connected to an Icom CI V radio When selected changing the frequency operating mode etc on the IC R8500 automatically changes those of connected radios and vice versa Auto baud rate 19200 bps default Transceive ON Transceive OFF default When connecting the IC R8500 to the IC 735 for transceive operation you must change the operating frequency data length to 4 bytes This item must be set to only when operating trans ceive with the IC 735 Frequency data set to Frequency data set to 5 bytes d
49. locked SLEEP INDICATOR p 29 Appears when the sleep timer is set 2 CONNECTIONS E Mounting installation Location Select a location for the receiver that allows adequate air circulation and access to the front and rear panels Do not place in areas subject to extreme heat cold or vibrations or near TV sets radios and electromagnetic sources 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 guaranteed under such conditions 9 Receiver stand The base of the IC R8500 has an adjustable stand for desktop use Set the stand to one of two angles de pending on your operating conditions ZZ ze Optional bracket and carrying handle e Mounting bracket An optional mounting bracket is available to install the radio under a table on a wall in a vehicle etc Select an area to mount the receiver keeping in mind that the weight of the IC R8500 is approx 7 kg Flat washer I P Allen bolt supplied with the IC R8500 Carrying handle An optional handle allows you to easily carry and transport the receiver Attach the MB 23 cARRYING HANDLE With the supplied rubber feet as shown ZY CAUTION The screws supplied with the MB 23 cannot be used with the IC R8500 Use the screws supplie
50. me IC R8500 Clearing the specified channel data e Special bank number and channels bn Memory channel contents set amp write FElFE 4A Eo 1A loo 19 oji 213 FF FD Special bank Bank number Remarks t La B T 20 e For programmed E g scan channel num o o E o Q o 21 bers are as follows io g E amp e D B o 9 05 8 E E 0P1 00 0P2 01 B ab E my n S s 3 3 1P1 02 1P2 03 E Ss E 2 E o E e etc up to 9P1 18 Q O Gc gt E o SE E 58 T t5 and 9P2 19 i c e E Cr c Fe vo 23 There is only one oO OU a d QU an 2 e m uu channel in the prior 24 ity bank Gain and level data gd BCD data AF GAIN Max Max counterclockwise clockwise SQUELCH 0000 eere ht 0255 IF SHIFT Max center Max counterclockwise clockwise APF control 900 e eseeses 0128 eee eee 0255 36 EN MAINTENANCE E Disassembly disassemble the receiver For internal maintenance and optional installations receiver CAUTION DISCONNECT the DC power cable or AC adapter before performing any work on the 4 screws from its sides the plug from the speaker cable Turn the receiver upside down up the bottom cover Remove 6 screws from the top of the receiver and Carefully lift up the top cover while disconnecting Remove 6 screws from the bottom cover then lift Speaker cable E Fuse replacement If a fuse blows or the receiver stops
51. mum receiving Push the APF switch Rotate the APF control to adjust the peak fre quency To change the filter width push APF for 1 sec Available for SSB CW and AM only BFO adjustment APF switch APF control APF is selected 10 10 20 20 30 30 40 40 APF N is selected 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 signal are often changed Use the BFO adjustment function to adjust the audio quality of the received signal to that desired Push SSB CW to select SSB or CW mode Push SSB CW for 1 sec to activate the function J appears Rotate M CH to adjust the BFO e 1 2 kHz to 1 2 kHz are selectable SSB CW switch Z4 BFO shift can be set for USB Z LSB and CW separately SN M CH selector AGC function AGC stands for automatic gain control This function controls receiver gain to produce a constant audio output level even when the received signal strength is varied by fading etc Use AGC slow for normal phone operation AGC fast for receiving data and searching for signals AGC time constant cannot be changed in FM and WFM modes Push AGC to toggle between AGC fast and slow AGC F ap
52. ndition DLY mA p 27 we Push momentarily to select a scan resume condi tion b OFF is underscored scan pauses on a signal until it disappears then resumes 3 sec after that PANEL DESCRIPTION 1 DLY is underscored scan resumes according to the DELAY SPEED control setting When a signal dis appears scan resumes 3 sec later co is underscored scan is cancelled when receiving a signal w Push for 1 sec to enter the delay time scan speed setting condition e The function of the DELAY SPEED control can be se lected KEYPAD The keypad can be used for several functions as below Keypad then ENT then MW Direct frequency input Keypad then M CH Memory channel selection e CE NAME then keypad Alphanumeric input for memory bank names etc Keypadthen TSA or TSY 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 1 PANEL DESCRIPTION E Rear panel RS 232C CONNECTOR p 10 Connects an RS 232C cable An RS 232C cable can be used to connect the IC R8500 to a PC In this way commands can be sent to the receiver via the PC CI V REMOTE CONTROL JACK p 10 Allows connection to an Icom CI V system trans ceiver or another receiver for the
53. ng to the desired channel Push the M CH key to set the selected memory Input for memory channels not available is cancelled EXAMPLE Selecting channel 39 from within the currently selected bank EXAMPLE Selecting channel 12 from a different bank bank 3 H 3 times H 18 19 5 MEMORY CHANNELS ll Programming This is the method most often used to program mem ory channels Select the desired memory channel Set 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 entry only to set the frequency Q Set operating mode p 13 and tuning steps p 12 amp Push and hold MW until the receiver emits 3 beeps e The information is stored in the memory channel NOTE When changing the memory channel before pushing MW the set frequency and Z4 mode tuning steps is erased Ws ooo ME 2o09 59 E Copy and paste memory Cenna When the frequency and mode tuning steps is set for 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 P
54. ntal deletion of multiple channels when you want to delete more than one channel from a bank repeat the above steps as many times as necessary NOTE1 Deleted channels are moved to the free bank however the programmed contents are erased NOTE2 The number of banks cannot be decreased This means that if there is only one channel in a bank it cannot be moved to the 4 free bank SH WAAAY The number of channels in this bank is decreased Adding inserting memory channels MEMORY CHANNELS 5 Select the bank you wish to add memory chan nel s to Q Push BANK for 1 sec One of appears and flashes Push BANK momentarily to exit the condition and return to the previous display if desired Rotate M CH to select the following INDICATION DESCRIPTION 1 channel will be inserted in front of the selected channel Programmed contents after the inserted channel are shifted accordingly 1 channel will be added at the end of the selected bank 10 channels will be added at the end of the selected bank Push BANK for 1 sec to perform the selected operation The memory channel s are deleted from the bank and added inserted to the selected bank Memory channels cannot be added inserted into a memory bank when the bank is empty Delete channel see opposite page
55. o 2 4 V DC AGC out signal strength weak to strong Output impedance 2 2 MQ Inner Output level 200 mV rms at Mod 1 kHz Dev 3 5 kHz RG ARIOH Output impedance 4 7 KQ Before the frequency de emphasis stage Usable for FM only not including WFM Outer GND Grounded Output is selectable with an internal jumper pin p 16 Pin Port name Description Output level More than 2 W Inner AR out Output impedance 4 8 Q Outer GND Grounded DC 13 8 V and DC IN sockets DC 13 8 V 9999 Inner CONNECTOR INFORMATION 9 out 9 POWER switch Internal regulator TIT Receiver circuit circuit o REC REMOTE jack O Outer Inner 3 5 mm diam 2 conductor o REC OUT jack O Outer Inner 3 5 mm diam 2 conductor o PHONES jack TW Outer O Inner Middle 6 mm diam 3 conductor DC IN Pin Port name Description DC IN Inner DC IN Accepts connection to the AD 55A V only Outer GND Grounded DC 13 8 V Pin Port name Description 1 13 8 IN 13 8 V DC input current consumption 2 A 12 5 V DC output when connecting AD 55 A V 12S QUT to DC IN socket Max 2 A 3 NC 4 GND Grounded Pin Port name Description e Grounded when squelch opens Inner SQL e Can be deactivated via initial set mode p 31 e Max current 1 A 12 V DC Outer GND Pin Port name Description e Output d
56. on p 37 Q Remove 6 screws from the metal plate then remove the metal plate and shield cover Remove 10 screws from the PLL unit then open the unit to expose the bottom Unsolder the feet of the internal crystal unit then remove it Place the CR 293 in the space available as shown in the diagram then solder its feet into place 6 points amp Adjust the reference frequency using a frequency counter Replace the ground spring to its original position Return the shield cover metal plate and bottom cover to their original positions Y NOTE The CR 293 is an oven type crystal unit Y and the specified frequency stability described ZZ above is guaranteed 1 min after power ON ON PLL unit 39 E TV R7100 rv RECEIVE ADAPTER OPTIONAL INSTALLATIONS 12 Connections yellow white Antenna Red to right White to left Yellow to video a aul TV R7100 IF O red from IF IN When the TV set has only one audio jack connect the white cable only Red to right White to left Yellow no connection black fro TV CONTROL eo amp stereo headphones LJ 9 Operation D Turn on the TV R7100 IC R8500 and all connected equipment Select WFM mode Push OUT FM TV on the TV R7100 to select
57. ory clear B APF control setting 05 add gd Stop scan 00 AGC OFF 10 Programmed scan start 02 note 1 AGC ON 11 Auto memory write scan start 04 note 1 Memory clear E on 16 E Memory scan start 22 note 2 Select memory scan start 23 note 2 APF OFF 30 Mode select scan start 24 note 2 APF ON 31 Priority scan 42 Power OFF activating sleep 1 00 SEL CH OE Power ON from sleep active 85 o CH release BO p SEL CH tag B1 Note 1 Only scan group 0 is usable VSC deactivation CO Note 2 Use these commands after sending a bank or mode VSC activation C1 command Scan resume selection co DO Scan resume selection OFF D1 Scan resume selection DLY D3 E Data format e Basic format from PC to IC R8500 m m m m 4A EO Oo 5 n O Data area e g ra FD Preamble code ed Sub command number selectable in set mode see table PC s address Command number IC R8500 s address see table BCD code area REMARK in table a End of message code Answer from IC R8500 to PC FE FE Eo 4A Cn Sc Data area e g Fo 4__4 4 Sg E 8 5 oU Ke ES og o z 8 2 Sut 5 S 8 9 gees g 5 8 c c e o 9055090 E o Ed Ke 22 E Ke E Q o DS 6 o E c e B E O o S ap c o E a a oO o O og O gt O c A o 50 o a W OK message from IC R8500 to PC FE
58. ow The coaxial cable is cut Fix the coaxial cable z No antenna is connected Connect an antenna p 8 O The connected antenna is not matched Connect an antenna matched to the re p 8 5 to the receive frequency ceiving frequency z Wrong antenna connector is used for e Check the antenna connection p 8 P V UHF and HF antenna Lu Wrong antenna connector is selected in e Select the proper antenna connector p 31 set mode for HF antenna SO 239 or phono RCA O An RF attenuator is activated Push ATT 10 dB or ATT 20 dB to can Ww cel the function tc Receive signal is un IF SHIFT is rotated too far CCW or Set IF SHIFT to the center position p 14 clear or distorted CW APF is rotated too far CCW or CW e Set the APF control to the center position p 15 or push the APF switch to turn it OFF The wrong mode switch is pushed Push the correct mode switch p 13 WFM mode cannot be e The operating frequency is lower than Set the frequency above 30 MHz when p 13 set 30 MHz WFM mode cannot be se in WFM mode lected below 30 MHz E Main dial does not func The lock function is activated Push LOCK for 1 sec to deactivate p 12 tion tc E LOCK does not lock of is selected in quick set Select in quick set p 31 the keypad function mode mode switches etc E 2 The selected frequency The memory channel was changed be e Push MW fo
59. pears when AGC fast is selected no indi cator appears when AGC slow is selected AGC switch RECEIVE FUNCTIONS 4 B Data communications Connections For high speed data 9600 bps reception in FM mode Audio IN or Detector IN Rear panel to AGC d Dn RCA plug TU or TNC To use the AGC socket for AF output Change the internal jumper plug as illustrated at right e The output is obtained for FM mode only Usable for 9600 bps only Refer to p 37 for a description of opening the case AGC output default AF direct detector output 200 mVrms 4 7 KQ Posojecosgs TU or TNC A to REC OUT 2 conguctor 3 5 to REC REMOTE d plugs SQUELCH IN Personal computer Receiving method Connect a terminal unit as above Q Select FM mode or USB CW modes for HF band data communications Q Set the receiver to the desired frequency as below Set the connected terminal unit to the appropriate settings Refer to the terminal unit s instructions Frequency settings depend on the mode used FM mode Setting frequency displayed freq Desired freq SB mode
60. r 1 sec to write into a p 19 amp is erased fore writing into memory memory before changing channels The frequency is not e An optional UT 102 voice SYNTHESIZER Install the UT 102 p 38 c announced when push UNIT is not installed ing SPCH TROUBLESHOOTING 13 cally off center signal is received in FM or WFM mode OFF or wait until the center frequency is selected PROBLEM POSSIBLE CAUSE SOLUTION REF Memory channels in e The bank limit function is activated and e Push BANK to turn OFF the bank limit p 18 another bank cannot be BANK is indicated function or use BANK or BANK to se is selected lect the bank LL Z Memory channels in the e Written memories condition is set as e Change the setting to p 24 AUTO bank are i XI cl 5 cleared e Bank name is erased CE is pushed on the final name Push ENT after setting the name p 20 Q after setting character Memory name cannot eA frequency has not yet been pro e Push MW for 1 sec in advance p 19 be written grammed into the memory channel e MW key is used for name programming e Push ENT after setting the name p 20 No scan will function e SQUELCH is open and is selected e Turn SQUELCH CW until noise disap p 14 pears Programmed scan and The same frequencies are programmed Reprogram different frequencies into p 27 auto memory
61. r to p 20 for program Push PROG for 1 sec To select the programmed scan edge and channel number 0P1 to 9P2 appear 17 B Channel selection Using the M CH selector MEMORY CHANNELS 5 ENT BANKY channel e Bank limit function from any bank Select the desired bank using M CH BANKA or Q Rotate the M CH selector to select the desired While rotating the M CH selector memory channels can be selected from within the current bank only or Push BANK to toggle the bank limit function ON and All memory channels can be selected via the M CH selector BANKA BANKY can be used OFF ATATA TATATA TATA TATATA TATATA TATA A ae rii fos ar TM nn BANK doesn t BANK appears appear Bank limit OFF Bank limit ON Only memory channels in the current bank can be se lected Banks can be se lected with the BANKA BANKY keys only Sook BANKA gt 00 BANKY M CH selector V Convenient Automatic bank limit When starting memory scan the bank limit function is activated automatically This automatic selection can be deactivated See p 26 Using the keypad selected via the keypad ENT BANKY channel Memory channels in the current bank can only be Select the desired bank using M CH BANKA or Q Push keys correspondi
62. rforming step above the receiver returns to the previous display 9 To confirm the set sleep period push SLEEP B momentarily one time e Be careful not to push the switch more than once other wise the sleep period may be changed To turn ON the receiver after the sleep timer has turned power OFF push POWER OFF then ON again The sleep timer is cancelled 8880 ocol 4 n O p a5 Each push of SLEEP Gi3d Previous display Push SLEEP ap once Set time B General Set mode is used for programming infrequently changed values or conditions of functions The IC R8500 has 2 separate set modes quick set mode and initial set mode 9 Selecting quick set mode Push SLEEP amp I3 for 1 sec Quick set mode is selected and one of its items appears Q Rotate the M CH control to select the desired item Rotate the main dial to set the values or conditions for the selected item Repeat steps and Q to set other items 9 To exit quick set mode push SLEEP 8B again e Pushing any other switch will also exit quick set mode 9 Selecting initial set mode Push POWER to turn power OFF OQ While pushing SLEEP 48 push POWER to turn power ON nitial set mode is selected and one of its items appears Rotate the M CH control to select the desired item Rotate the main dial to set the values or conditions for t
63. to activate the 10 dB attenuator P 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 AUDIO 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 audio peak passband w When the audio peak filter circuit is ON push for 1 sec to toggle the filter setting between normal and narrow Narrow is available for SSB CW and AM only SPEECH LOCK SWITCH SPCH LOCK Push momentarily to activate the voice synthesiz er function and have the displayed frequency announced An optional UT 102 SPEECH SYNTHESIZER UNIT iS nec essary to activate the voice synthesizer function p 38 PANEL DESCRIPTION 1 Automatic announcement at signal detection during scan is available Refer to the PE item on p 31 for details Push for 1 sec to activate the lock function p 12 e Push for 1 sec again to cancel the lock function e The lock function action can be selected in set mode to cover the main dial only or to cover both the main dial and front panel switches TUNING STEP SWITCHES TSAJ TS V p 12 Select the tuning step for the main dial Push TSA to select a larger tuning step push TSW to select a smaller tuning step 10 Hz 50 Hz 100 Hz 1 kHz 2 5 kHz 5 kHz 9 kHz 10 kHz 12 5 kHz 20 kHz 25 kHz
64. ush M SET to temporarily store the displayed frequency mode etc appears Only 1 channel can be stored in the temporary space Q Select the memory channel you wish to program the frequency into Push M SET again to paste the stored contents e W disappears ll Clearing NOTE Remember that pushing MW is always necessary to program contents into a memory channel Pasted contents will be cleared if the MW key is not pushed for 1 sec RA 8888 ooo OOO 9C 0C C BL COCOCO oO O 34 M SET key Information programmed into a memory channel can be cleared erased Select the memory channel to be cleared Q Push and hold M CL until the receiver emits 3 beeps V Convenient Bank assign function Using the bank assign function memory channels can be removed along with their programmed con tents from a particular memory bank and placed temporarily in the free bank See p 21 ooo eaa E como pm M CL key E Channel bank names Channel names of up to 8 characters and bank names of up to 5 characters can be programmed for conve nience Programmed names can be easily copied to other channels using the copy paste function Channel name programming MEMORY CHANNELS 5 c
65. ve selected a threshold point in a range the IC R8500 will open for all signals above this point To adjust the squelch rotate SQUELCH Clockwise rotation closes the squelch sets the threshold point higher counterclockwise rotation opens the squelch for reception of weak signals Y S meter squelch gon threshold e Noise squelch b aie UE threshold not meter leve are muted available in SSB 7 CW WFM and AM narrow modes When SQUELCH is rotated past center the S meter shows the signal strength needed to open the squelch E Functions for FM Center indicator FM signals have a wide bandwidth which makes them easy to receive However you may be tuned off cen ter resulting in audio distortion The IC R8500 s off center indicators appear in such cases making it easy to fine tune to the center of the frequency ec One of these indicators appears when the received signal is off center o AFC AFC stands for automatic frequency control The AFC circuit automatically compensates the tuning when a receive frequency drifts or goes off frequency When one of the off center indicators appears the IC R8500 can adjust the receive frequency automat ically when the AFC function is turned ON and an off center frequency is received the frequency in the display automatically changes to reflect the center of the signal When one of these indicators appears the

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