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Icom IC-R75 Manual

1. e Data format The CI V system can be operated using the following data formats Data formats differ according to command numbers A data area or sub command is added for some commands CONTROLLER TO IC R75 OK MESSAGE TO CONTROLLER QO OQ ow 6 D O ETE O O D 6 9 2625 S E D o 29 o 8 5 5 ET ET OG X XX X X D D E z u D OD u 01 Q d coco Do o E Q G oc o 8 5 5 2222 PE 8 8 5 5 8 8 o 3 3 Gg Gg OS O O O O Oo gt b ErEr LS o d gt o X D fe O UO ESE mc G 2 o o O g c o o 94890 gO D z o 9o c gt O Om f C m o 9 D D 2 Ko So e 2 Q gt 2 Ps i a o D ot o Qo O D O O O 03 S O K 03 T oc 3 O E O ec E e LLI LLI O ena IC R75 TO CONTROLLER NG MESSAGE TO CONTROLLER QO OQ ow 6 O o0 o DE VE og O O o0 YH O D 2 o O 25295 gt E D D o 9 9 O D EF EE O OD _ O O o d dd coca E o d G o p 9 U000 oe E 9 35 5 8 8 O d a agog 235 O O S s OO 6 Q vm uo ET C E 0 E o o O ie O Oo o gogo O2 D Q vw I Z O c ab oO K oO Q YN aa 2400 m 2 o oO 0 2 C L O gt o E o Q i L 0 e 2 9 2 So Q D 90 D i 9 5 SE E i p E e O O C m O X 8 G 8 X 2 Q LU LLI O ea 40 e Command table Command Lo Send frequency data Same as Send mode data command 06 Read band edge frequencies Read operating frequency Read operating mode e C3 Same as command 06 Setfrequencydata gt S
2. 38 13 OPTIONS seres 39 14 CONTROL COMMAND 40 43 ll Remote jack CI V information 40 EN P E Front panel PANEL DESCRIPTION asc2 oer 3 8 Jes opeaker Function display p 5 COMMUNICATIONS RECEIVER IC R75 is J FE a AF 9 RF SQL TWIN PBT ar LSEY t T PHONES qe Ea I J Tel EES Q POWER SWITCH POWER Push momentarily to turn power ON e Turn the optional DC power supply ON in advance Push for 2 sec to turn power OFF HEADPHONE JACK PHONES p 8 Accepts headphones e When headphones are connected the internal speaker or connected external speaker does not function AF CONTROL AF inner control Varies the audio output level from the speaker RF GAIN SQUELCH CONTROL RF SQL outer control pgs 14 30 Adjusts the squelch threshold level The squelch removes noise output from the speaker closed condition when no signal is received he squelch is particularly effective for FM It is also available for other modes he control can be set as the squelch plus RF gain controls or squelch control only RF gain is fixed at maximum in set mode Q PASSBAND TUNING CONTROLS TWIN PBT p 15 Adjust the receiver s passband width
3. eeeeeseee 9 ll FSK and AFSK SSTV connections 10 M Connecting to a PC sssssse 10 4 FREQUENCY SETTING 11 13 BP UT 11 M Using the keypad 11 B Frequency setting 12 B Dial lock function eeesssesse 13 5 RECEIVE FUNCTIONS 14 20 eee eg 14 R Squelch and RF gain 14 I win PET ODOFalOFD sssnivikivempsetisibe oZ i cox eda 15 BI Noise blanker eese 15 Br eee 16 EI Attenuator uoc pi rry riporta Rep c eld anden 16 E AGC time constant eene 16 E Antenna selection 16 ll CW reverse mode esee 17 R CW pitch control MDC 17 B RTTY reverse mode sese 17 B Filter selection esee 18 B Filter set mode sees 19 R Optional noise reduction function 20 ll Optional auto notch function 20 1 TABLE OF CONTENTS 6 MEMORY OPERATION 21 24 I Memory channels esse eee bnt cuir joda 21 E Memory channel selection 21 E Memory channel programming 22 B Frequency transferring 23
4. 455 kHz wide or narrow filter selection does appear when 9 MHz wide or narrow filter is set to OFF 20 D RECEIVE FUNCTIONS E Optional noise reduction function When an optional UT 106 is installed DSP appears in the function display noise reduction function can be used The noise reduction function reduces noise components and picks out desired signals which are buried in noise The received AF signals are converted to digital signals and then the desired signals are separated from the noise D Push NR to turn the noise reduction ON e NR indicator appears 2 Push NR for 2 sec to enter the noise reduction level setting condition 3 Rotate the tuning dial to adjust the noise reduction level 4 Push NR to exit the setting condition 5 Push NR again to turn the noise reduction OFF e NR indicator disappears WE Optional auto notch function When an optional UT 106 is installed DSP appears in the function display an auto notch function can be used The function automatically attenuates more than 3 beat tones tuning signals etc even if they are moving 7 The auto notch functions in SSB mode only D Select SSB mode 2 Push ANF to turn the auto notch function ON ANF indicator appears 3 Push ANF again to cancel the function e ANF indicator disappears optional UT 106 Noise reduction OFF Noise reduction activated Desired signal CW Ha
5. 3 Rotate the tuning dial to set the desired CW audio pitch CW audio pitch is displayed in 10 Hz steps 60 indicates 600 Hz CW audio pitch 4 Push ANT SET again to exit set mode B RITY reverse mode Received characters are occasionally garbled when the receive signal is reversed between MARK and SPACE This reversal can be caused by incorrect TNC connections settings commands etc To receive a reversed RTTY signal correctly select RTTY reverse mode RECEIVE FUNCTIONS 5 e Receive audio tone response 1 3 octave i 1 2 octave BFO Push for 2 sec CW RTTY a FN Desired signal Interference 600 Hz 800 Hz Desired signal Interference 600 Hz 400 Hz CW mode USB side CW REV mode LSB side Shows a 600 Hz CW audio pitch D Push CW RTTY once or twice to select RTTY mode 2 Push CW RTTY for 2 sec to toggle between RTTY and RTTY reverse RTTY REV Check the receive signal D RECEIVE FUNCTIONS B Filter selection The filter selection switches the IF passband width as shown in the table at right a Fitter Paseband pu The filter selection is automatically memorized in P ES YN ea each mode 250 H2 6dB D Select the desired mode with the mode switches FL 103 2 8kHz 6 dB SSB W 2 Push FIL one or more times to select the desired 1 9 kHz 6 dB SSB N filter combination E 350 Hz 6dB CW N RTTY N 3 or I does not appear while in
6. 7 Xc Maximum RF gain X Squelch is open HF gain adjustable range S meter squelch e When set as the SQL control Noise squelch FM mode Noise squelch threshold TN FM S meter squelch aliis threshold S meter squelch e When set as the RF control Maximum RF gain Adjustable range Minimum RF gain B Twin PBT operation The twin PBT Passband Tuning function electronically narrows the IF passband widths to reduce interference Moving both TWIN PBT controls to the same position shifts the IF Variable range depends on the filter selection 1 29 kHz in 15 Hz steps and 258 kHz in 3 Hz steps are available PBT OPERATION EXAMPLE RECEIVE FUNCTIONS 5 7 TWIN PBT should normally be set to the center positions when there is no interference When PBT is used the audio tone may be changed PBT may not function with some IF filter combinations Not available for FM mode SN 4 Both controls at Cutting a lower Cutting both higher and center position passband lower passbands TWIN PBT TWIN PBT TWIN PBT o Q IF center frequency Interference Desired signal Interference Interference B Noise blanker The noise blanker eliminates pulse type noise such as from car ignitions The noise blanker is not available for FM mode Push the NB switch to turn the noise blanker ON or OFF r e When using the noise blanker receive
7. PLL unit B UT 102 VOICE SYNTHESIZER UNIT The UT 102 announces the received frequency mode S meter level and current time in a clear electronically generated voice in English or Japanese we Push LOCK for 2 sec to announce the frequency etc D Remove the top cover as shown above 2 Remove the protective paper attached to the bottom of the UT 102 to expose the adhesive strip 3 Plug UT 102 into J1271 on the MAIN unit as shown at right 4 Return the top cover to its original position 3 Remove the supplied internal crystal and replace with the CR 282 4 Adjust the reference frequency at L2 using a frequency counter 5 Return the PLL unit and top cover to their original positions Connect a frequency counter here and adjust the frequency CR 282 to 60 00000 MHz ll UT 106 DSP UNIT The UT 106 provides AF DSP functions such as noise reduction and auto notch D Remove the top and bottom covers 2 Remove the shielding plate 3 Remove the connection cable P1241 from J1221 on the MAIN unit Connect the cable into J1 on the UT 106 4 Plug the connection cable P1 from the UT 106 to J1221 on the MAIN unit 5 Plug the flat cable into J3 on the UT 106 and to J1231 on the MAIN unit Take care of the conductor direction 6 Attach the Velcro tape as shown at right Attach the UT 106 to the reverse side of the MAIN unit 7 Return the shielding plate top cover and bottom cover
8. Frequency settings depend on the mode used 7 FM mode Setting frequency displayed freq Desired freq USB mode Setting frequency displayed freq Desired freg Center of Mark and Space freq CW narrow mode Setting frequency displayed freq Desired freq Center of Mark and Space frea 600 Hz L SB mode for amateur RTTY Setting frequency displayed freq Desired freq Mark frea SN TU or TNC o System requirements To use this program the following hardware and software are required IBM PC compatible computer e An RS 232C serial port Microsoft Windows 95 or Microsoft Windows 98 e Intel i486DX4 processor or faster Pentium 100 MHz or faster recommended e At least 16 MB RAM At least 10 MB of hard disk space At least 640 x 480 pixel high color 16 bit display Supplied RS 232C cable OPC 743 E Read me first The receiver uses memory channels for storage of frequencies as well as mode tuning steps etc When turning power OFF or changing memory channels the previously displayed frequency cannot be recalled unless it has been stored into a memory channel AGC 3 5 7 9 20 40 60dB P TH PH TD PD TD PH H PD T TD T T T T FREQUENGY SETTING 4 mm Therefore wh
9. When the scan detects a signal the scan stops pauses or ignores it depending on the resume setting and the squelch condition 7 To cancel the scan push SCAN 7 2 or more memory channels must be programmed Z for memory scan to start S appears for the select channel E Priority watch operation Priority watch checks for signals on a frequency every 5 sec while operating on a VFO frequency D Select memory mode with V M 2 Select the desired memory channel to be watched with UP A or V DN 3 Select VFO mode 4 Set RF SQL closed e f the RF SQL control function is set as RF control the squelch always opens See pgs 14 30 for details 5 Push SCAN for 2 sec to start priority watch e SCAN appears ll 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 memory channels 80 to 99 7 When the auto memory write scan starts the ZZ previously written memory channels 80 to 99 are ZZ cleared 14 456 00 14 567 00 14 678 00 14 890 00 14 050 00 JER EE EE fi 1 Select VFO mode with V M 2 Select the desired operating mode he operating mode can also be changed while scanning 3 Set RF SQL closed e If the RF SQL control function is set as RF control the squelch always opens See pgs 14 30 for details SCANS 6 When a signal is received
10. if desired Push SEL for 2 sec to turn memory name indication OFF gt Beep Beep Beep Push for 2 sec E Scan types PROGRAMMED SCAN AUTO MEMORY WRITE SCAN Repeatedly scans between two scan edge frequencies scan edge memory channels P1 and P2 Auto memory write scan automatically memorizes paused frequencies into memory channels 80 to 99 Scan edge P1 or P2 Scan edge P2 or P1 This scan operates in VFO mode SELECT MEMORY SCAN Repeatedly scans all select memory channels S select S select S select necu S select S select This scan operates in memory mode E Preparation e Channels For programmed scan auto memory write scan Program scan edge frequencies into scan edge memory channels P1 and P2 For memory scan Program 2 or more memory channels except scan edge memory channels For select memory scan Designate 2 or more memory channels as select memory channels To designate the channel as a select memory channel select a memory channel then push SEL in the scan screen memory mode or in the memory channel screen For priority watch Program 1 or more memory channels e Scan resume ON OFF You can select the scan to resume or cancel when detecting a signal in set mode Scan resume ON OFF must be set before operating a scan See p 31 for ON OFF setting and scan resume condition details e Scan speed Scan speed can be selected from 2 levels high or low i
11. of the 455 kHz and 9 kHz IF filters for the inner and outer controls respectively e Set to the center positions when not in use 9 gt Z SE le esse se m G CLOCK MODE SWITCH CLOCK p 28 Toggles between frequency indication and clock indication when pushed Q ANTENNA SELECTOR SET MODE SWITCH ANT SET pgs 16 30 e While in a frequency indication enters set mode when pushed we While in a frequency indication toggles between the antenna 1 and 2 connectors when pushed for 2 sec While in the clock indication enters time setting condition when pushed for 2 sec we While in a timer indication toggles the timer ON or OFF when pushed Q TUNING DIAL Changes the displayed frequency selects set mode items etc TUNING DIAL TENSION LATCH Adjusts the tension of the tuning dial LOCK SPEECH SWITCH LOCK pgs 13 34 e Toggles the frequency lock function ON and OFF e Announces the selected readout frequency when an optional UT 102 is installed and when pushed for 2 sec MEMORY CHANNEL UP DOWN SWITCHES V DN UP A p 21 Select a memory channel Select a set mode contents while in set mode Select a timer or time indication while in clock indication w Select a filter set mode contents while in filter set mode MEMORY WRITE SWITCH MW pgs 22 27 Stores the displayed frequency and operating mode into the selected memory channel when pushed for 2 sec
12. to 900 Hz without changing the operating frequency The CW audio pitch can be adjusted in 10 Hz steps e The CW audio pitch is displayed in 10 Hz steps 60 indicates 600 Hz CW audio pitch e Blank channel indication This item sets the blank channel indication ON or OFF e on blank memory channels are skipped and can not be selected e oF all memory channels can be selected SET MODE 9 31 32 O SET MODE e Recorder remote This item sets the REC REMOTE jack function ON or OFF e CI V address To distinguish equipment each CI V transceiver or receiver has its own Icom standard address in hexadecimal code The IC R75 s address is 5Ah When 2 or more IC H75 s are connected to an optional CT 17 CI V LEVEL CONVERTER rotate the tuning dial to select a different address for each IC R75 in the range 01h to 7Fh CI V baud rate This item sets the data transfer rate 3 300 bps 12 1200 bps 48 4800 bps 96 9600 bps HI 19200 bps and At automatic are available When At is selected the baud rate is automatically set according to the connected controller or remote controller e CI V transceive Transceive operation is possible with the IC R75 connected to other Icom HF transceivers or receivers When on is selected changing the frequency operating mode etc on the IC R75 automatically changes those of connected transceivers or receiv
13. 29 99 MHz and 50 54 MHz only e Mode e Number of memory channels Frequency stability Power supply requirement e Current drain at 13 8 V DC e Antenna connector e Dimensions projections not included Weight approx REMOTE connector e CI V connector USB LSB CW RTTY AM FM 101 99 regular 2 scan edges Less than 7 ppm from 1 min to 60 min after power on After that rate of stability less than 1 ppm hr at 25 C 77 Temperature fluctuations 0 C to 50 C 32 F to 122 F less than 5 ppm 13 8 V DC 15 negative ground Standby 0 9 A Max audio 1 1 A SO 239 50 Q push connection terminal 500 Q 241 W x94 H x229 D mm 9 2 W x3 Ae H x9 s2 D in 3 0 kg 6 Ib 10 oz RS 232C D sub 9 pin 2 conductor 3 5 d mm 1 o Receiver Receive system Triple conversion superheterodyne system Intermediate frequencies Mode 1st MHz 2nd MHz 3rd kHz Frequencies differ according to the selected IF filter Sensitivity Frequency SSB CW RTTY AM FM range 10 dB S N 10 dB S N 12 DES SINAD 0 1 1 8 MHz 2 0 uV 5 6 uV 1 8 28 MHz 0 16 uV 1 6 uV EMEM 28 29 99 MHz 0 16 uV 1 6 uV 0 22 uV 50 54 MHz 0 13 UV 1 0 UV 0 2 uV Preamp OFF Preamp 1 ON Preamp 2 ON Squelch sensitivity threshold SSB CW RTTY Less than 5 6 uV FM Less than 0 32 uV Preamp 1 ON Preamp 2 ON e Sele
14. 500 Hz 6 dB CW RTTY nar FL 53A 250 Hz 6 dB CW nar e FL 96 2 8 kHz 6 dB SSB wide e FL 222 1 8 kHz 6 dB SSB nar e FL 257 3 3 kHz 6 dB SSB wide IC MB5 MOBILE MOUNTING BRACKET Receiver mounting bracket for mobile operation SP 21 EXTERNAL SPEAKER Designed for base station operation Input impedance 8 Q Max input power 5 W UT 102 VOICE SYNTHESIZER UNIT Announces the receive frequency mode S meter level and current time in a clear electronically generated voice in English or Japanese UT 106 DSP UNIT Provides AF DSP functions such as noise reduction and auto notch Approved Icom optional equipment is designed for optimal performance when used with an Icom receiver Icom is not responsible for the destruction or damage to an Icom receiver in the event the Icom receiver is used with equipment that is not manufactured or approved by Icom 39 EN 14 CONTROL COMMAND ll Remote jack CI V information e CI V connection example The receiver can be connected through an optional CT 17 CI V LEVEL CONVERTER to a PC equipped with an HS 232C port The Icom Communications Interface V CI V controls the following functions of the receiver Up to 4 Icom CI V transceivers or receivers can be connected to a PC equipped with an RS 232C port See p 32 for setting the CI V condition using set mode
15. 96 FL 222 and FL 257 respectively for 455 kHz IF filter selection 4 Push FIL to exit filter set mode o Wide narrow filter setting 1 Push FIL for 2 sec to enter filter set mode e f a blank memory channel has been selected push V M to select VFO mode in advance 2 Select the desired mode with the mode switches 3 Push UP AJ or W DN one or more times to select the desired width 9 MHz or 455 kHz IF filter Wide or narrow mode can be deactivated when 9 MHz wide or narrow filter is set to OFF e 455 kHz wide or narrow filter selection does appear when 9 MHz wide or narrow filter is set to OFF 4 Rotate the tuning dial to select a filter 5 Repeat steps 2 and to select IF filters for other modes if desired e The filter combinations are stored depending on operating modes 6 Push FIL to exit filter set mode Expanded filter selection ON OFF The selectable filter combinations can be expanded by setting the expanded filter selection to ON D Push FIL for 2 sec to enter filter set mode e f a blank memory channel has been selected push V M to select VFO mode in advance 2 Push UP AJ or VW DN one or more times until EXP appears 3 Rotate the tuning dial to turn the expanded filter selection ON OFF e If ON is selected the expanded filter selection can be used 4 Push FIL to exit filter set mode r MO RECEIVE FUNCTIONS 5 9 MHz normal filter selection
16. AM signals ON and OFF An optional UT 106 DSP UNIT is required amp NOISE BLANKER SWITCH NB p 15 Toggles the noise blanker ON and OFF The noise blanker reduces pulse type noise such as that generated by automobile ignition systems This function is not effective for FM or non pulse type noise AGC SWITCH AGC p 16 we Toggles the AGC Automatic Gain Control time constant fast and slow when pushed e Toggles the AGC function ON and OFF when pushed for 2 sec 9 SELECT SWITCH SEL pos 24 26 Toggles the select memory setting ON and OFF when pushed in memory mode e Toggles the memory name indication ON and OFF when pushed for 2 sec in memory mode SCAN SWITCH SCAN p 25 Push momentarily to start stop the programmed scan in VFO mode e Push momentarily to start stop the memory scan in memory mode Push for 2 sec to start the priority watch in VFO mode Push SCAN again to cancel the priority watch E Function display PANEL DESCRIPTION 2 MM C GA LSBUSBCW AMFMRTTY UTE TC l keai i E m IL oO m I TIMER INDICATOR p 28 Appears when power on off timer or sleep timer is in use DSP UNIT INDICATOR p 35 Appears when an optional UT 106 DSP UNIT is installed AUTOMATIC NOTCH FILTER INDICATOR p 20 Appears when the optional automatic notch filter is in use NOISE REDUCTION INDICATOR p 20 Appears when the optional noise reduction function is
17. B Memory names eere 24 ME Memory clearing esses 24 TSN vene 25 27 mcan VDES eoan ene ee eee eer eee eee 25 B Preparation sese eee 25 E Programmed scan operation 26 E Memory select memory scan operation 26 ll Setting select memory channels 26 Bi Priority watch operation 27 ll Auto memory write scan operation 27 B CLOCK AND TIMERS 28 29 ll Setting the current time 28 Bi Setting power on time 28 li Setting power off time 29 li Setting sleep timer period 29 9 SET MODE uiuen eoni 30 33 ll Set mode description 30 10 OPTION INSTALLATIONS 34 35 R Opening the receivers case 34 ll CR 282 HIGH STABILITY CRYSTAL UNIT 34 B UT 102 VOICE SYNTHESIZER UNIT 34 I UT 106 DSP UNIT sese 35 B Optional IF fiters 2 35 11 MAINTENANCE 36 37 Mi Troubleshooting es 36 R Resetting the CPU sse 36 B Fuse replacement 3r R Clock backup battery replacement 97 12 SPECIFICATIONS
18. OPC 869 The AD 55 AD 55A AD 55S and AD 55V have different shapes INSTALLATION AND CONNECTIONS 3 B Antenna connection Antennas play a very important role in receiver When using a 50 Q antenna use ANT 1 connector operation Connecting a poor quality antenna to the for connection When using a 500 Q long wire receiver will result in less than optimum performance antenna use ANT 2 terminal for connection PL 259 CONNECTOR INSTALLATION EXAMPLE D 30 mm poc Slide the coupling ring solder qe Slide the connector down Strip the cable body on and solder it jacket and soft solder Te Coupling ring 10 mm soft solder 2 Strip the cable as Screw the coupling ring DE shown at left Soft onto the connector solder the center con body ductor 10 mm in B Tape recorder connections The REC OUT jack has 350 mV rms 4 7 kQ output for connection to other audio equipment 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 recording control 1 A DC max CX XX KKK CX XX S S S REC REC OUT AUX IN or REMOTE 350 mVrms LINE IN jack 4 7 KQ B Iransceive function Icom CI V transceivers or receivers can be connected When a set frequency is out of range for one of the via the REMOTE jack T
19. RECEIVE INDICATOR Appears while receiving a signal or when the squelch is open D MODE INDICATORS p 14 Indicate the selected operating mode REVERSE MODE INDICATOR p 17 Indicates a reverse operating mode is selected WIDE NARROW FILTER INDICATORS p 18 07 appears when the wide IF filter is selected e appears when the narrow IF filter is selected 2 PANEL DESCRIPTION E Rear panel RECORDER REMOTE JACK REC REMOTE Controls the running of a tape recorder for recording Connects to the REMOTE jack on a tape recorder This function can be turned OFF in set mode p 32 RECORDER JACK REC Outputs receive audio signals Connects to the AUX or LINE IN jack on a tape recorder RS 232C CONNECTOR RS 232C Connects an RS 232C cable An RS 232C cable can be used to connect the receiver to a PC In this way commands can be sent to the receiver via the PC CI V REMOTE CONTROL JACK REMOTE Allows connection to an Icom CI V system transceiver or another receiver for the transceive function Also connects to a PC with several receivers for command control via an optional CT 17 CI V LEVEL CONVERTER Q EXTERNAL SPEAKER JACK EXT SP Connects an 8 Q external speaker if desired When an external speaker is connected the internal speaker does not function Q MUTE CONTROL JACK MUTE Mutes audio outputs and attenuates the receive signal input when grounded Used for CI V t
20. and does not have contents E Memory clearing Any unnecessary memory channels can be cleared The cleared memory channels become blank channels D Select memory mode with V M 2 Select the memory channel to be cleared with UP A or W DN 3 Push CLR for 2 sec to clear the contents e The programmed frequency and operating mode disappear e BLANK appears 4 To clear other memory channels repeat steps 2 and 3 4 Push ENT to edit memory channel name e A cursor appears and blinks e Memory channel names of blank channels cannot be edited 5 Input the desired character by pushing a key on the keypad one or more times 1 inputs numeral 1 e 2 inputs numeral 2 and letters A to C e 3 inputs numeral 3 and letters D to F 4 inputs numeral 4 and letters G to I e 5 inputs numeral 5 and letters J to L 6 inputs numeral 6 and letters M to O e 7 inputs numeral 7 and letters P R and S e 8 inputs numeral 8 and letters T to V 9 inputs numeral 9 and letters W to Y e 0 inputs numeral 0 and letters Q and Z Rotate tuning dial for cursor movement e Numerals can only be used for the 7th and 8th digits e Push to delete the selected character and input a space 6 Push ENT to input the set the name The cursor disappears Push CLR to abandon the settings and return to previous memory name D Repeat steps 3 to to program another memory channel s name
21. of this chart contact your nearest Icom Dealer or Service Center _ PROBLEM POSSIBLE CAUSE SOLUTION REF Power does not come on DC power cable is improperly connected e Reconnect the DC power cable correctly when the POWER switch Fuse is blown Check for the cause then replace the fuse with p 37 is pushed a spare one Fuses are installed in the DC power cable and the internal MAIN unit No sound comes from the Volume level is too low Rotate AF clockwise to obtain a suitable p 2 speaker listening level The squelch is closed Rotate RF SQL to 12 o clock position to open p 14 the squelch Sensitivity is low The antenna is not connected properly Reconnect to the antenna connector The antenna for another band is selected e Select an antenna suitable for the operating p 16 frequency The attenuator is activated Push ATT to turn the function OFF 16 14 RECEIVE p Receive audio is distorted The operating mode is not selected correctly Select a suitable operating mode p PBT function is activated e Set TWIN PBT to the center position p 15 p p 15 16 Noise blanker function is activated Push NB to turn the function OFF Preamp is activated Push P AMP once or twice to turn the function OFF e The optional noise reduction is activated and lt Push NR to turn the function OFF p 20 the NR level is set too high Programmed
22. on a watch channel the function display shows the watch channel and SCAN blinks S1 3 5 7 9 20 40 60dB Evy U III scan nzo 1 C Pp gt 7 To cancel the watch push SCAN 4 Push SCAN to start the programmed scan e SCAN appears while scanning e f the same frequencies are programmed into the scan edge memory channel P1 and P2 programmed scan does not start 5 Push MW to start the auto memory write scan e 80 blinks when auto memory write scan starts SCAN CI L n de 6 When the scan detects a signal the frequency is programmed into a memory channel 80 to 99 starting from channel 80 7 To cancel the scan push SCAN 27 28 CLOCK AND TIMERS E Setting the current time The receiver has a built in 24 hour clock with power off and power on timer functions This is useful when logging SWLs BCLs and so on D Push CLOCK to select clock indication mode Current time and CL appear 2 Push ANT SET for 2 sec to enter time setting condition e Current time flashes E Setting power on time The receiver can be set to turn ON automatically at a specified time D Push CLOCK to select clock indication mode 2 Push UP A to select power on timer screen Power on time and on appear 3 Push ANT SET for 2 sec to enter time setting condition Power on time flashes Push ANT SET momentarily when the power on timer is already
23. result in an electric shock NEVER expose the receiver to rain snow or any liquids DO NOT use or place the receiver in areas with temperatures below 10 14 F or above 60 C 140 F Be aware that temperatures on a vehicle s dashboard can exceed 80 C 176 F resulting in permanent damage to the receiver if left there for extended periods DO NOT place the receiver in excessively dusty environments or in direct sunlight DO NOT place the receiver against walls or putting anything on top of the receiver This will obstruct heat dissipation Place unit in a secure place to avoid inadvertent use by children During mobile operation DO NOT operate the receiver without running the vehicle s engine When receiver power is ON and your vehicle s engine is OFF the vehicle s battery will soon become exhausted Make sure the receiver power is OFF before starting the vehicle This will avoid possible damage to the receiver by ignition voltage spikes For U S A only CAUTION Changes or modifications not expressly approved by the party responsible for compliance could void the user s authority to operate the equipment FOR CLASS B UNINTENTIONAL RADIATORS This equipment has been tested and found to comply with the limits for a Class B digital device pursuant to part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipmen
24. scan does Squelch is open e Set RF SQL to the threshold point p 14 not stop RF SQL is assigned to RF gain control and Reset RF SQL control assignment and setitto pgs squelch is open the threshold point 14 30 Programmed scan does The same frequencies have been programmed Program different frequencies in scan edge p 22 not start in scan edge memory channels P1 and P2 memory channels P1 and P2 Memory scan does not 2 or more memory channels have not been Program 2 or more memory channels p 22 start programmed Select memory scan does 2 or more memory channels have not been Designate 2 or more memory channels as select p 26 not start designated as select channels channels for the scan F AGC flashes in the A scan or band scope function is activated via lf these functions are not in use push AGC to function display an optional RS R75 remote control software deactivate the function The displayed frequency The dial lock function is activated Push LOCK to deactivate the function p 13 does not change properly The internal CPU has malfunctioned Reset the CPU See below DISPLAY E Resetting the CPU When first applying power or when the function 7 memory channels and returns programmed values the CPU as follows ZZ in set mode to their defaults NN 1 Make sure receiver power is OFF 2 While pushing UP A and W DN push POWER to turn powe
25. to their original positions Bl Optional IF filters Several IF filters are available for the IC R75 You can install 1 filter for both 9 MHz and 455 kHz IF Choose appropriate filter for your operating needs 9 MHz optional filters FL 101 CW NARROW FILTER FL 232 RTTY CW NARROW FILTER FL 100 CW NARROW FILTER FL 223 SSB NARROW FILTER FL 103 SSB WIDE FILTER 250 Hz 6 dB 350 Hz 6 dB 500 Hz 6 dB 1 9 kHz 6 dB 2 8 kHz 6 dB 455 kHz optional filters FL 53A CW NARROW FILTER FL 52A CW RTTY NARROW FILTER FL 222 SSB NARROW FILTER FL 96 SSB WIDE FILTER 250 Hz 6 dB 500 Hz 6 dB 1 8 kHz 6 dB 2 8 kHz 6 dB 3 3 kHz 6 dB FL 257 SSB WIDE FILTER 9 MHz filter OPTION INSTALLATIONS 10 9 wi V 9 Installation D Remove the top cover as shown on the opposite page 2 Install the desired 9 MHz filter as shown in the diagram below he filters can be installed in either direction 3 Install the desired 455 kHz filter as shown in the diagram below 4 Replace the top cover ZZ After filter installation specify the installed filter 77 using filter set mode p 19 Otherwise the 7 installed filter will not function properly 455 kHz filter n0 OD V QUO 35 EN MAINTENANCE B Troubleshooting The following chart is designed to help you correct If you are not able to locate the cause of a problem problems which are equipment malfunctions or solve it through the use
26. turned ON 3 Set the current time using the tuning dial or push keypad using 4 digit 24 hour system 4 Push ENT to set the time Push CLR to cancel the setting 5 Push CLOCK to exit clock indication mode 4 Set the desired time using the tuning dial or push keypad using 4 digit 24 hour system 5 Push ENT to set the time Power on timer is automatically turned ON Push CLR to cancel the setting Push ANT SET momentarily to toggle the power on timer ON and OFF if necessary e o and X indicates the power on timer is turned ON and OFF respectively 7 Push ENT to exit clock indication mode Push POWER for 2 sec to turn the power OFF e When the set time arrives the power is automatically turned ON E Setting power off time The receiver can be set to turn OFF automatically at a specified time D Push CLOCK to select clock indication mode 2 Push UP AJ or W DN twice to select power off timer screen Power off time and oF appear 3 Push ANT SET for 2 sec to enter time setting condition Power off time flashes Push ANT SET momentarily when the power off timer is already turned ON E Setting sleep timer period The receiver can be set to turn OFF automatically The power off period can be set from 1 min to 23 hours 59 min D Push CLOCK to select clock indication mode 2 Push W DN to select sleep timer screen e Sleep timer perio
27. 2 sec EXAMPLE Programming 21 280 MHz CW into memory channel 18 CW RTTY keypad then A Beep Beep Push for 2 sec B Frequency transferring The frequency and operating mode in a memory channel can be transferred to the VFO Transferring in VFO mode This is useful for transferring programmed contents to VFO D Select VFO mode with V M 2 Select the memory channel to be transferred with UP A or V DN e BLANK appears if the selected memory channel is a blank channel and does not have contents 3 Push V M for 2 sec to transfer the frequency and operating mode Transferred frequency and operating mode appear on the frequency readout Transferring in memory mode This is useful for transferring frequency and operating mode while operating in memory mode 7 When you have changed the frequency or ZZ operating mode in the selected memory channel Displayed frequency and mode are transferred Programmed frequency and mode in the memory channel are not transferred and they remain in the memory channel D Select the memory channel to be transferred with UP A or W DN in memory mode And set the frequency or operating mode if required 2 Push V M for 2 sec to transfer the frequency and operating mode Displayed frequency and operating mode are transferred to the VFO 3 To return to VFO mode push V M momentarily MEMORY OPERATION 6 Frequency transferring can be performe
28. Higher setting of the NR level results in audio signal masking or distortion Set the NR level for maximum clarity The noise reduction function is available in all modes including AM and FM modes Noise components Noise reduction example 7 TLL 4 optional UT 106 Auto notch ON Auto notch OFF Desired signal AF Desired signal AF Particular frequency is attenuated Unwanted tone frequency MEMORY OPERATION 6 Hl E Memory channels The receiver has 101 memory channels The memory All 101 memory channels are tuneable which means mode is very useful for quickly changing to often used the programmed frequency can be tuned temporarily frequencies with the tuning dial etc in memory mode MEMORY MEMORY TRANSFER OVER CHANNEL CHANNEL CAPABILITY TO VFO WRITING CLEAR NUMBER Regular memory y One frequency and one mode in Scan edge One frequency and one mode in memory each memory channel as scan channels edges for programmed scan E Memory channel selection Using the UP A or W DN keys Using the keypad D Push V M to select memory mode D Push V M to select memory mode e MEMO appears e MEMO appears 2 Push UP A or W DN several times to select the 2 Push the desired memory channel number using desired memory channel the keypad e Push and hold UP A or VW DN for continuous Enter 100 or 101 to select scan edge channel P1 or selection P2 respectively 3 To return t
29. O jeje INSTRUCTION MANUAL COMMUNICATIONS RECEIVER IC H 75 AF 9 RF SQL TWIN PBT Li Icom Inc IMPORTANT READ THIS INSTRUCTION MANUAL CAREFULLY before attempting to operate the receiver SAVE THIS INSTRUCTION MANUAL This manual contains important safety and operating instructions for the IC R75 EXPLICIT DEFINITIONS TRADEMARKS A WARNING UR injury fire hazard or electric shock may CAUTION Equipment damage may occur If disregarded inconvenience only No risk of personal NOTE injury fire or electric shock Icom Icom Inc and the Icom logo are registered trademarks of Icom Incorporated Japan in Japan the United States the United Kingdom Germany France Spain Russia and or other countries Microsoft and Windows are registered trademarks of Microsoft Corporation in the United States and other countries Pentium is a registered trademark of Intel Corporation All other products or brands are registered trademarks or trademarks of their respective holders PRECAUTIONS AWARNING NEVER apply AC to the DC13 8V jack on the receiver rear panel This could cause a fire or ruin the receiver AWARNING NEVER apply more than 16 V DC such as a 24 V battery to the DC13 8V jack on the receiver rear panel This could cause a fire or ruin the receiver AWARNING NEVER let metal wire or other objects touch any internal part or connectors on the rear panel of the receiver This may
30. Set the desired condition using the tuning dial 4 Push ANT SET to exit the set mode e RF squelch control The RF SQL control can be set as the squelch control default RF gain is fixed at maximum the RF gain control only squelch is fixed as open or RF squelch control See p 14 for details e Confirmation beep A beep sounds each time a switch is pushed to confirm it This function can be turned OFF for silent operation The volume level can be set in the next item e Beep level This item adjusts the volume level for confirmation beep tones from 0 to 100 in 1 steps The volume level is displayed in 10 steps 5 indicates 50 volume level e Beep level limit This item limits the maximum volume level for confirmation beep tones e S meter peak hold The peak level of the S meter can be displayed for 0 5 sec to confirm it easily 30 e Scan resume This item sets the scan resume function ON or OFF e on scan resumes 10 sec after stopping on a signal or 2 sec after a signal disappears e oF scan does not resume after stopping on a signal See p 25 for scanning details e Scan speed The receiver has 2 speeds for scanning high and low See p 25 for scanning details e AM mode noise blanker The noise blanker for AM mode can be turned ON and OFF CW pitch control The received CW audio pitch and monitored CW audio can be adjusted to suit your preferences 300
31. These tuning steps are Independently selectable for each mode e Selectable from 0 1 1 5 6 25 9 10 12 5 20 25 100 kHz D Select the desired operating mode with SSB CW RTTY AM or FM p 14 2Push TS one or more times until the Sendes programmable tuning step indicator appears step indicator above the 1 kHz A e Rotating the tuning dial changes the frequency according to the set tuning step 3 Push TS for 2 sec while the programmable tuning step indicator appears to enter the tuning 10 kHz tuning step is step set mode selected 4 Rotate the tuning dial to set the desired tuning step for the selected mode 5 Push TS to exit the tuning step set mode 6 Rotate the tuning dial to change the frequency according to the set tuning step 1 Hz and 10 Hz tuning steps When both the 1 MHz tuning step and programmable tuning step disappear rotating the tuning dial changes the frequency in increments of 1 or 10 Hz i changes the frequency in 10 Hz steps Rotating the tuning dial DPush TS one or more times until the programmable tuning step indicator or 1 MHz tuning step indicator disappears 2 Push TS for 2 sec to toggle between the 1 and 10 Hz step settings When the 1 Hz step is selected the 1 Hz digit appears Rotating the tuning dial in the frequency indication when the 10 Hz step is l e changes the frequency selected the 1 Hz digit disappears fr
32. W 08 level data Outside TWIN PBT setting 0000 max CCW 0128 center 0255 max CW 09 level data CW PITCH setting 0000 low pitch to 0255 high pitch 11 12 13 14 15 01 Read squelch condition 02 Read S meter level Set preamp 00 OFF 01 preamp 1 02 preamp 2 16 18 19 A Set AGC time constant 00 OFF 01 S fast 02 fast 03 slow Set noise blanker 00 OFF 01 ON Set optional noise reduction 00 OFF 01 ON Set optional auto notch 00 OFF 01 ON 00 Turn the receiver power ON 01 Turn the receiver power OFF 0 Read the receiver ID 00 data Send read memory contents See example 1 on p 42 Send read IF filter setting See example 2 on p 42 Send read set mode contents See example 3 on p 43 01 data 02 data 41 14 CONTROL COMMAND CI V data example 1 Reading sending memory contents Q Memory channel 39 Q Attenuator OFF Select memory ch select ch Preamp Preamp 1 Receive frequency 12 345678 MHz Q Antenna selection ANT Q Receive mode FM Memory name DXSPOT 1 IF filter Narrow NOTE When reading data are not required o 0000 led neal sad telis MUERE 3 Memory name uses ASCII codes e Space 20h e Numerals 30h 39h e Alphabetical 41h 5Ah except 7th and 8th digits e Non named channel FFh e CI V data example 2 Reading sending IF filter setting Q Receive mode LSB USB 9 MHz filter Normal 2 4 kHz Na
33. control RF SQL to adjust one of either the RF gain or the squelch RF SQL adjusts either the RF gain or the squelch depending on the operating mode selected and the condition of the RF SQL item in set mode p 30 e RF SQL control priority Set mode USB LSB At AUTO RF GAIN rS RF SQL RF SQL RF SQL The RF gain is set to maximum level when the RF SQL is set as SQL control The RF Radio Frequency gain is used to adjust the receiver gain e Shallow rotation moves the S meter to the right indicating the signal strength which can be received Z The recommended position for RF gain is the 12 ZZ o clock position since this sets RF gain to the max The SQUELCH removes noise output from the speaker closed condition when no signal is received The squelch is particularly effective for FM It is also available for the other modes When operating in FM first rotate the control fully counterclockwise Then rotate the control clockwise to the point where the noise just disappears This is the best position The squelch does not open for weak signals OPERATING MODE SELECTION CW RTTY L Lew ov LSB AM Push _ momentarily FM Push _ momentarily Push mode switch for 2 sec Push mode switch momentarily when it is set too deep segment appears in the S meter to indicate the S meter squelch level e When set as the RF SQL control Recommended level Noise squelch FM mode
34. ctivity SSB CW RT TY More than 2 1 kHz 6 dB Less than 4 0 kHz 60 dB AM More than 6 kHz 6 dB Less than 20 kHz 50 dB FM More than 12 kHz 6 dB Less than 30 kHz 40 dB e Spurious and image rejection ratio More than 70 dB except IF through 50 MHz band e Audio output power More than 2 0 W at 10 at 13 8 V DC distortion with an 8 Q load e PHONES connector 3 conductor 6 35 d mm 4 e External SP connector 2 conductor 3 5 d mm 8 Q All stated specifications are typical and subject to change without notice or obligation FL 100 FL 101 FL 103 FL 223 and FL 232 9 MHz FILTERS FL 100 500 Hz 6 dB CW RTTY nar FL 101 250 Hz 6 dB CW nar e FL 103 2 8 kHz 6 dB SSB wide e FL 223 1 9 kHz 6 dB SSB nar e FL 232 350 Hz 6 dB RTTY CW nar MB 23 CARRYING HANDLE For remote receiver control using a PC You can change frequencies operating mode memory channels etc CR 282 HIGH STABILITY CRYSTAL UNIT Contains a temperature compensating oven heater and crystal unit for improved frequency stability e Frequency stability 0 5 ppm RS R75 REMOTE CONTROL SOFTWARE Allows you to control the receiver from your PC for Microsoft Windows 95 or Windows 98 S AM Synchronous AM mode appears and can be selected on the control screen however the receiver will function in normal AM mode only OPTIONS 1 3 FL 52A FL 53A FL 96 FL 222 and FL 257 455 kHz FILTERS e FL 52A
35. d and SL appear 3 Push ANT SET for 2 sec to enter time setting condition Sleep timer period flashes LI 1 1 LLILI p be ia al CLOCK AND TIMERS 8 4 Set the desired time using the tuning dial or push keypad using 4 digit 24 hour system 5 Push ENT to set the time Power off timer is automatically turned ON Push CLR to cancel the setting 6 Push ANT SET momentarily to toggle the power off timer ON and OFF if necessary o and X indicates the power off timer is turned ON and OFF respectively 7 Push ENT to exit clock indication mode When the set time arrives the power is automatically turned OFF with 5 beeps 4 Set the desired periods using the tuning dial or push keypad using 4 digit 24 hour system 5 Push ENT to set the periods Sleep timer is automatically turned ON Push CLR to cancel the setting 6 Push ANT SET momentarily to toggle the sleep timer ON or OFF if necessary e o and X indicates the sleep timer is turned ON and OFF respectively 7 Push ENT to exit clock indication mode The receiver emits 5 beeps and turns OFF after the sleep timer period elapses 29 EN O sgr uong ll Set mode description Set mode is used for programming infrequently changed values or conditions of functions Set mode operation D Push ANT SET to enter the set mode 2 Push UP A or W DN to select the desired item 3
36. d in either VFO mode or memory mode TRANSFERRING EXAMPLE IN VFO MODE Operating frequency 21 320 MHz USB VFO Contents of M ch16 14 018 MHz CW TRANSFERRING EXAMPLE IN MEMORY MODE Operating frequency 14 020 MHz CW M ch 16 Contents of M ch 16 14 018 MHz CW I HI n Lt ANT 1 AGC 20 40 60dB Displayed memory channel contents are transferred Memory channel contents remain in the memory channel 23 24 6 MEMORY OPERATION E Memory names All memory channels including scan edges can be tagged with alohanumeric names of up to 8 characters each Letters capitals except o numerals and spaces can be used Numerals can only be used for the 7th and 8th digits Turning memory name indication ON OFF D Select memory mode with V M 2 Push SEL for 2 sec to turn memory name indication ON Frequency disappears and a memory name appears if programmed Non named channel 3 Push SEL for 2 sec to turn memory name indication OFF Z While the memory name indication is selected 7 pushing TS shows the operating frequency and Z rotating the tuning dial while pushing TS 7 changes the frequency temporally Editing programming memory names D Select memory mode with V M 2 Push SEL for 2 sec to turn memory name indication ON 3 Select the memory channel to program with UP A or W DN e BLANK appears if the selected memory channel is a blank channel
37. d signals may be distorted if they are excessively strong e The noise blanker function in AM mode can be deactivated depending on set mode setting p 31 Desired signal 16 D RECEIVE FUNCTIONS E Preamp The preamp amplifies received signals in the front end circuit to improve the S N ratio and sensitivity Turn this function ON when receiving weak signals Push P AMP to toggle between preamp 1 and preamp 2 or turn the preamp OFF B Attenuator The attenuator prevents desired signals from distorting when very strong signals are near the desired frequency or when very strong electric fields such as from broadcasting stations are near your location Push ATT toggle the 20 dB attenuator function ON and OFF ATT appears when the attenuator is turned ON B AGC time constant The AGC Automatic Gain Control 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 e Push AGC momentary to toggle the AGC time constant between fast and slow e F AGC appears when the fast time constant is selected AGC appears when the slow time constant is selected Push AGC for 2 sec to turn the AGC circuit OFF e AGC OFF appears when the AGC circuit is turned OFF Push AGC to turn the AGC circuit ON e S meter is deactivated w
38. d while scanning 3 Set RF SQL open or closed See previous page for scan condition e If the RF SQL control function is set as RF control the squelch always opens See pgs 14 30 for details 4 Push SCAN to start the programmed scan e SCAN appears while scanning 5 When the scan detects a signal the scan stops pauses or ignores it depending on the resume setting and the squelch condition 6 To cancel the scan push SCAN Z If the same frequencies are programmed into the Z scan edge memory channel P1 and P2 G programmed scan does not start E Memory select memory scan operation D Select memory mode with V M 2 Select the desired operating mode The operating mode can also be changed while scanning 3 Set RF SQL open or closed See previous page for scan condition e If the RF SQL control function is set as RF control the squelch always opens See pgs 14 30 for details 4 Push SCAN to start the memory select memory scan e SCAN appears while scanning E Setting select memory channels D Select memory mode with V M 2 Select the desired memory channel to set as select memory channel 3 Push SEL to set the memory channel as a select memory or not e S appears for select memory channels 4 Repeat steps 2 to O to program another memory channel as a select memory channel if desired 5 Push SEL to toggle between memory scan and select memory scan 6
39. e oggles the programmed scan and auto memory write scan when pushed B CLEAR SWITCH CLR p 24 e Clears the input digits while inputting a frequency or memory channel number e Clears the selected memory channel contents when pushed for 2 sec in memory mode This switch does not function in VFO mode D VFO MEMORY SWITCH V M pgs 21 23 we Toggles the operating mode between VFO mode and memory mode when pushed we Selects a memory channel for inputting a memory channel number when pushed e Transfers the memory contents to VFO when pushed for 2 sec D KEYPAD pgs 11 21 The keypad can be used for several functions as below Keypad then ENT Direct frequency input Keypad then V M Memory channel selection ENT then keypad in memory name indication mode Alphanumeric input for memory name etc QUICK TUNING STEP SWITCH TS pgs 12 13 we Selects a quick tuning step or turns the quick tuning step OFF e While the quick tuning indicator is displayed the frequency can be changed in kHz or MHz steps e While the quick tuning step is OFF turns the 1 Hz step ON and OFF when pushed for 2 sec e 1 Hz indication appears and the frequency can be changed in 1 Hz steps e While the kHz quick tuning step is selected enters tuning step set mode when pushed for 2 Sec e While the memory name indication is selected in memory mode pushing this switch shows the operating frequency and rotating t
40. en you want to keep a displayed frequency for later recall you must program it into a memory channel by pushing MW for 2 sec See p 22 for details BLANK appears above the memory channel readout until MW is pushed for 2 sec E Using the keypad D Push the numeral keys on the keypad to enter the MHz digits for the desired frequency e f a key is mistakenly pushed push CLR and start again from the beginning When entering the same MHz digits as the displayed frequency this step can be skipped 2 Push on the keypad EXAMPLE Setting the frequency using the keypad To set to 28 00 MHz To set to 21 050 MHz Push MW for 2 sec after tuning 3 Push the numeral keys to enter the frequency digits below 1 MHz e f a key is mistakenly pushed push CLR and start again from the beginning 4 Push ENT to set the input frequency When pushing ENT after entering the MHz digits zeros are automatically entered for the kHz digits 4 FREQUENCY SETTING E Frequency setting Rotate the tuning dial to change the frequency he frequency changes in increments determined by the selected tuning step see below e When the lock function is activated LOCK appears the frequency cannot be changed via tuning dial Push TS one or more times to select a quick tuning step Programmable tuning steps Programmable tuning steps are available to suit your operating requirements
41. ers and vice versa CI V with IC 735 When connecting the IC R75 to the IC 735 for transceive operation you must change the operating frequency data length to 4 bytes his item must be set to ON only when operating receiver with the IC 735 e Speech language When the optional UT 102 VOICE SYNTHESIZER UNIT is installed you can select between English and Japanese as the language e En English announcement e JP Japanese announcement See p 34 for unit installation e Speech speed When the optional UT 102 VOICE SYNTHESIZER UNIT is installed you can select between faster or slower synthesizer output See p 34 for unit installation e Speech S level When the optional UT 102 VOICE SYNTHESIZER UNIT is installed you can have signal level frequency mode and current time announcement Signal level announcement can be deactivated if desired See p 34 for unit installation e Speech current time When the optional UT 102 VOICE SYNTHESIZER UNIT is installed you can have signal level frequency mode and current time announcement Current time announcement can be deactivated if desired See p 34 for unit installation e RTTY mark frequency This item selects the RTTY mark frequency RTTY mark frequency is toggled between 1275 1615 and 2125 HZ e RTTY shift width This item adjusts the RTTY shift width There are 3 selectable values 170 200 and 425 Hz e LCD backlight This item adjusts t
42. et LSB Set USB Set AM Set CW Set RTTY Set FM Set CW R Set RTTY R me Select VFO mode Select memory mode 0001 0101 Select memory channel P1 0100 P2 0101 Memoywis J memory to VFO J emory clear Scan stop Programmed memory scan start Programmed scan start Auto memory write scan start Memory scan start Select memory scan start Set as non select channel Set as select channel Set scan resume OFF Set scan resume ON ER e NO 1 Add 00 01 or 02 for selecting wide normal or narrow filter respectively O NJ e Command 00 01 0 08 EN 09 0B 10 Hz 1 Hz tuning step 100 Hz tuning step 1 kHz tuning step 5 kHz tuning step 6 25 kHz tuning step 9 kHz tuning step 10 kHz tuning step 12 5 kHz tuning step 20 kHz tuning step 25 kHz tuning step 100 kHz tuning step 1 MHz tuning step CONTROL COMMAND 14 00 Attenuator OFF 20 Attenuator ON 00 Select ANT 1 01 Select ANT2 01 00 Announce with voice synthesizer 00 all data 01 frequency and 02 S meter level 02 receive mode 01 level data AF level setting 0000 max CCW to 0255 max CW 02 level data RF level setting 0000 max CCW to 0255 11 o clock 03 level data SQL level setting 0000 11 o clock to 0255 max CW 06 level data NR level setting 0000 min to 0255 max 07 level data Inside TWIN PBT setting 0000 max CCW 0128 center 0255 max C
43. g conditions Bl Optional bracket and carrying handle Mounting bracket An optional IC MB5 MOBILE 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 receiver is approx 3 kg Flat washer 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 3 INSTALLATION AND CONNECTIONS BH Connections o ICOM IC R75 COMMUNICATIONS RECEIVER HEADPHONES 8 m9 SSB CW RTTY FIL REMOTE p 9 32 AF 9 RF SQL 1 PHONES Used for computer control and transceive MUTE CONTROL JACK p 6 POWER NEZ NTP mw J cur LI 7 N d N see ANTENNA 2 Connect a long wire antenna impedance 500 Q ANTENNA 1 p 9 Connect a Yagi antenna impedance 50 Q RECORDER RECORDER CONTROL p 9 RS 232C JACK p 10 EXTERNAL SPEAKER p 39 AD 55 A S N or
44. he AD 55 AD 55A AD 55S and AD 55V have different shapes INFORMATION A switching type AC adapter includes a switching regulator The receiver could receive switching noise from the adapter s switching regulator circuit Depending on the usage environment it tends to happen in AM reception especially around 7 to 10 MHz If it causes interference please try some of the following to reduce the noise Ground the receiver e When another AC powered equipment is connected to the receiver plug the AC adapter into a different AC outlet than the equipment Keep the AC adapter as far away from the receiver s antenna and any metal objects as possible Attach an AC line filter to the AC adapter IMPORTANT rd i EXPLICIT DEFINITIONS ss best ee eee i TRADEMARKS Leese sdddagoinkanngesndne i PRECAUTIONS ceza ac agan aaa UPS mA TICK R 229 ya rna i SUPPLIED ACCESSORIES Luren iii 1 TABLE OF CONTENTS 1 2 PANEL DESCRIPTION 2 6 huis159 MT NE 2 ME Function display esses 5 Heed DANG M 6 3 INSTALLATION AND CONNECTIONS 7 10 eed els q 7 R Receiver stand sse sese F R Optional bracket and carrying handle 7 E GOS CHO ENT 8 ME Antenna connection eese 9 B Tape recorder connections 9 B Iransceive function
45. he brightness of the LCD from 0 to 100 96 in 1 96 steps The brightness is displayed in 10 steps 5 indicates 5096 brightness e Auto tuning step This item sets the auto tuning speed The tuning dial normally changes the frequency 2 5 kHz revolution in 10 Hz tuning step When auto tuning speed is turned on this increases to 50 kHz revolution in 50 Hz tuning step during quick rotation of the dial SET MODE 9 33 EN 10 option INSTALLATIONS 34 Bl Opening the receiver s case Follow the case and cover opening procedures shown here when you want to install an optional unit or adjust an internal unit etc 7 CAUTION DISCONNECT the DC power cable 77 from the receiver before performing any work on Z the receiver Otherwise there is danger of electric G shock and or equipment damage D Remove the 2 screws from the left side of the receiver to remove an optional carrying handle if necessary 2 Remove the 4 screws from the top of the receiver and 4 screws from the sides then lift up the top cover 3 Remove the 2 screws from the bottom of the receiver slide the cover backward then remove the bottom cover mH CR 282 HIGH STABILITY CRYSTAL UNIT By installing the CR 282 the total frequency stability of the receiver will be improved D Remove the top cover as shown in the diagram above Q Remove 5 screws from the PLL unit disconnect P1 from J491 MAIN unit then remove the PLL unit
46. he frequency and mode connected transceivers or receivers the connected become the same when either radio is changed radio s frequency mode does not change IC R75 Icom CI V transceiver receiver O ad o 9 O J YV KO000 REMOTE Connect to REMOTE jack ZZ Be sure the CIV TRn item is turned ON in set mode p 32 3 INSTALLATION AND CONNECTIONS E FSK and AFSK SSTV connections To connect a terminal unit TNC or scan converter refer to the diagram below D Connect a terminal unit as below 2 Select RTTY mode or USB CW modes for HF band data communications 3 Set the receiver to the desired frequency as at right 4 Set the connected terminal unit to the appropriate settings Refer to the terminal unit s instructions Z The optional 250 Hz CW narrow filters may not 7pass RTTY signals Be sure to select the 77 appropriate IF filters corresponding to the signal ZZ width pgs 18 19 to REC REMOTE 2 conductor 3 5 d plugs SQUELCH IN Bl Connecting to a PC The RS R75 remote control software is available to perform data setting and remote control of the receiver Refer to the diagram below for connection
47. he tuning dial while pushing this switch changes the frequency temporally PANEL DESCRIPTION 2 p FILTER SWITCH FIL pos 18 19 e Push momentarily to toggle between the pre programmed normal wide and narrow IF filters for the selected operating mode Push for 2 sec to enter filter set mode p MODE SWITCHES SSB CW RTTY AM FM p 14 Select an operating mode Push SSB to toggle between LSB and USB e Push CW RTTY to toggle between CW and RTTY e Push CW RTTY for 2 sec to toggle between CW and CW reverse or RTTY and RTTY reverse Push AM to select AM Push FM to select FM 2 PANEL DESCRIPTION B Front panel continued Function display p 5 wo oe Jes PREAMP SWITCH P AMP p 16 Push to toggle between preamp 1 and preamp 2 or turn the preamp OFF ATTENUATOR SWITCH ATT p 16 Push to toggle the 20 dB attenuator function ON and OFF NOISE REDUCTION SWITCH NR p 20 e Toggles the optional noise reduction function ON and OFF when pushed Functions in SSB CW and RTTY modes An optional UT 106 DSP UNIT is required e Enters noise reduction level set mode when pushed for 2 sec An optional UT 106 DSP UNIT is required AUTOMATIC NOTCH FILTER SWITCH ANF p 20 Push to turn the optional automatic notch filter for receiving
48. hen the AGC circuit is turned OFF B Antenna selection 2 types of antenna can be connected to this receiver When 2 antennas are connected select an antenna depending on the operating condition Push ANT SET for 2 sec to toggle between the antenna 1 and 2 connectors e f a blank memory channel has been selected push V M to select VFO mode in advance PREAMP appears while the preamp is activated ATT ANT 1 1 3 5 7 9 420 40 60dB ATT appears while the attenuator is activated ANT 1 F AGC 1 3 5 7 9 20 40 60dB F AGC appears when the fast time constant is selected ANT 1 S1 3 5 7 9 20 44 60dB lal ANT1 appears when the ANT1 connector is in use E CW reverse mode CW R CW Reverse mode receives CW signals with a reverse side CW carrier point like that of LSB and USB modes Use when interfering signals are near a desired signal and you want to change the interference tone D Push CW RTTY once or twice to select CW mode 2 Push CW RTTY for 2 sec to toggle between CW and CW reverse CW REV Check the interfering tone E CW pitch control The received CW audio pitch and monitored CW audio can be adjusted to suit your preferences 300 to 900 Hz without changing the operating frequency The received CW audio pitch can be adjusted in 10 Hz steps D Push ANT SET momentarily to enter set mode 2 Push UP AJ or W DN to select the CW PITCH item
49. in use Q LOCK INDICATOR p 13 Appears when the dial lock function is in use Q SIGNAL METER Shows the relative receive signal strength Shows the S meter squelch level when used Q PREAMP INDICATOR p 16 Appears when antenna preamp 1 or preamp 2 is in use Q ATTENUATOR INDICATOR p 16 Appears when the attenuator function is in use ANTENNA INDICATORS p 16 Indicate which antenna connector is in use NOISE BLANKER INDICATOR p 15 Appears when the noise blanker function is in use D SCAN INDICATOR p 25 Appears when scan or priority watch is activated we Flashes when scan or priority watch is paused D AGC INDICATORS p 16 AGC appears when slow AGC time constant is selected E AGC appears when fast AGC time constant is selected AGC OFF appears when the AGC function is turned OFF we TE AGC blinks while scanning or while using band scope via an optional RS R75 amp MEMORY MODE INDICATOR p 21 Indicates memory mode is selected D VFO MODE INDICATOR Indicates VFO mode is selected MEMORY CHANNEL NUMBER READOUT p 21 we Shows the selected memory channel number e S appears when the displayed memory channel is designated as a select memory channel BLANK MEMORY INDICATOR Shows that the displayed memory channel is not programmed This indicator appears both in VFO and memory modes FREQUENCY READOUT Shows the operating frequency
50. n set mode See p 31 for details scans MEM MEMORY SCAN Repeatedly scans all programmed memory channels S select Men 1 S select S select ee ke S select S select This scan operates in memory mode PRIORITY WATCH Repeatedly watches a memory channel 5 sec 125 msec VFO Memory frequency channel This scan operates in VFO mode e Squelch condition O Scan starts with squelch open For programmed scan When tuning step is 1 kHz or less The scan continues until it is stopped manually it does not pause even if signals are detected The scan is paused when the squelch is closed and then opened scan resumes after 10 sec has passed when the scan resume is ON scan is cancelled when the scan resume is OFF When tuning step is more than 5 kHz The scan pauses on each step when the scan resume is ON not applicable when the scan resume is OFF For memory scan Scan pauses on each channel when the scan resume is ON not applicable when the scan resume is OFF O Scan starts with squelch closed Scan stops when a signal is detected e If the scan resume is set to ON in scan set mode the scan pauses for 10 sec when detecting a signal then resumes When a signal disappears while scan is paused scan resumes 2 sec later 25 26 7 SCANS E Programmed scan operation D Select VFO mode with V M 2 Select the desired operating mode The operating mode can also be change
51. normal IF filter c D appears when wide IF filters are selected FL 52A 500 Hz 6 dB CW N RTTY N M appears when narrow IF filters are selected FL 53A 250 Hz 6 dB FL 96 2 8kHz 6 dB SSB W Z ter de Lid IS riis tl pisi 1 8kHz 6dB SSB N iter in filter set Mode Uptional filters are no i G selected by default Ne e Filter construction 9 MHz IF filter 455 kHz IF filter FL 23 15 kHz i CFWS450E 15 kHz FL 257 3 3 kHz FL 96 2 8 kHz FL 222 1 8 kHz FL 52A 500 Hz FL 53A 250 Hz optional 3rd IF signal FL 103 2 8 kHz FL 223 1 9 kHz FL 100 500 Hz FL 232 350 Hz FL 101 250 Hz optional B Filter set mode When an optional filter is installed set the optional filters in filter set mode Optional filters are not selected by default Optional filter setting D Push FIL for 2 sec to enter filter set mode e f a blank memory channel has been selected push V M to select VFO mode in advance 2 Push UP AJ or VW DN one or more times until oP1 appears for 9 MHz IF filter setting or oP2 appears for 455 kHz IF filter setting 3 Rotate the tuning dial to select the installed filter No 100 101 103 223 and 232 indicate no optional filter FL 100 FL 101 FL 103 FL 223 and FL 232 respectively for 9 MHz IF filter selection e No 52A 53A 96 222 and 257 indicate no optional filter FL 52A FL 53A FL
52. o VFO mode push V M again 3 Push V M to select the desired memory channel 4 To return to VFO mode push V M again 21 22 6 MEMORY OPERATION E Memory channel programming Memory channel programming can be preformed either in VFO mode or in memory mode Programming in VFO mode D Set the desired frequency and operating mode in VFO mode 2 Push UP A or W DN several times to select the desired memory channel e BLANK appears if the selected memory channel is a blank channel and does not have contents 3 Push MW for 2 sec to program the displayed frequency and operating mode into the memory channel Preamp setting attenuator on off antenna selection and AGC setting can also be programmed into a memory channel Programming in memory mode D Select the desired memory channel with UP A or W DN in memory mode e BLANK appears if the selected memory channel is a blank channel and does not have contents 2 Set the desired frequency and operating mode in memory mode To program a blank channel use direct frequency entry with the keypad in advance 3 Push MW for 2 sec to program the displayed frequency and operating mode into the memory channel Preamp setting attenuator on off antenna selection and AGC setting can also be programmed into a memory channel EXAMPLE Programming 7 088 MHz LSB into memory channel 12 D Beep B Um Deep Push for
53. om the frequency in 1 Hz steps indication FREQUENCY SETTING 4 o 1 MHz quick tuning step The quick tuning step function allows you to change the frequency in 1 MHz steps when rotating the Quick tuning step tuning dial indicator Push TS one or more times until the 1 MHz tuning step indicator appears above the 1 MHz indicator TS SWITCH FLOW CHART Programmable step tuning 10 Hz tuning 100 Hz 100 kHz 1 MHz tuning momentarily momentarily 1 Hz tuning Selectable for each mode B Dial lock function The dial lock function prevents accidental changes caused by the tuning dial The lock function electronically locks the dial Push LOCK momentarily to toggle the lock function ON and OFF e LOCK appears in the function display while the lock function is activated LOCK LOCK appears while the lock function is activated S RECEIVE FUNCTIONS B Mode selection The following modes are available in the IC R75 SSB LSB USB CW CW REV CW reverse FM AM RTTY and RTTY REV RTTY reverse Push SSB to toggle between LSB and USB Push CW RTTY momentarily to toggle between CW and RTTY Push CW RTTY for 2 sec to toggle between CW and CW reverse or RTTY and RTTY reverse Push AM to select AM Push FM to select FM 7 The selected mode is indicated in the function 7 display ll Squelch and RF gain The receiver uses the same
54. r ON he internal CPU is reset he receiver displays its initial VFO frequencies when resetting is complete JO CO C C L POWER WDN UPA 36 E Fuse replacement If a fuse blows or the receiver stops functioning try to find the source of the problem and replace the damaged fuse with a new rated fuse G CAUTION DISCONNECT the DC power cable 7 from the receiver when changing a fuse The IC R75 has 2 types of fuses installed for receiver protection DC power cable fuses FGB3A Circuitry fuse FGB3A CIRCUITRY FUSE REPLACEMENT The 13 8 V DC from the DC power cable is applied to all units in the IC R75 through the circuitry fuse This fuse is installed in the MAIN unit 1 Remove the top cover as shown on p 34 2 Replace the circuitry fuse as shown in the diagram at right 3 Replace the top cover MAINTENANCE 1 1 DC POWER CABLE FUSE REPLACEMENT B Clock backup battery replacement The receiver has a lithium backup battery CR2032 inside for clock and timer functions The usual life of the backup battery is approximately 2 years When the backup battery is exhausted the receiver receives normally but cannot retain the current time IF LT 37 EN 12 SPECIFICATIONS 38 General e Frequency coverage 0 03 60 000000 MHZ 0 03 29 999999 MHz only for Asia version 0 03 29 999999 and 50 0 52 0 MHz for Denmark version specifications guaranteed 0 1
55. ransceive operation with a transceiver GROUND TERMINAL GND p 7 Connects the black terminal to ground Q ANTENNA 2 TERMINAL ANT 2 p 9 Connects the red terminal to a 500 Q long wire antenna ANTENNA 1 CONNECTOR ANT 1 p 9 Connects a 50 Q antenna with a PL 259 connector and a 50 Q coaxial cable DC POWER JACK DC 13 8V p 8 e Connects the supplied AC adapter for versions with an AC adapter Connects to a 13 8 V DC power source using the supplied DC cable for versions without an AC adapter Current of 1 5 A or greater is required d DO NOT use a cigarette lighter socket as a power source when operating in a vehicle The plug may cause voltage drops and ignition noise may be superimposed onto received audio MAH INSTALLATION AND CONNECTIONS 3 E Grounding To prevent accidents involving electricity and interference from transceivers ground the receiver through the GND terminal on the rear panel For best results connect a heavy gauge wire or strap to a long earth sunk copper rod Make the distance between the GND terminal and ground as short as possible G A WARNING NEVER connect the GND G terminal to a gas or electric pipe since the connec ZZ tion could cause an explosion or electric shock 9 69 3o09 0 EH p B Receiver stand The base of the receiver has an adjustable stand for desktop use Set the stand to one of two angles depending on your operatin
56. rrow OFF Wide 15 kHz 455 kHz filter Normal 6 kHz Narrow 2 4 kHz Wide 15 kHz NOTE When reading data and are not required Normal Narrow Wide VO QO Q re mo OD JOG 00600000 0 2 e Data Mode Data 9MHzfilter Ew tseuss v staten Data 455 kHz filter o0 15 khz bultin oa F soote F Toor Los 250 H ELTON 06 500 Hz FL SZA 250 Hz FL 53A 42 CONTROL COMMAND 14 e CI V data example 3 Reading sending set mode contents b Q 4 w O Set mode number 21 backlighting Set data Set backlighting to a little on FJEIFJE S AJ E 011 Al0 2121110118 0 F D o0 O09 the brighter side 180 NOTE When reading data is not required changes depending on the set mode contents Refer to the Type in the table below Type 1 lype2 Type 3 Type 4 hr min sec hr min 0 1 0111810 11515 101010 1141310 e Set mode data table Selectable value Squech AUto RF gain squelch OFFION 0 100 OFFION OFFION 06 Scan resume OF FON Lowhigh os AMmodemosebamer OFFON po 1 Count on us A 5580H 1EX 5 Printed in Japan Icom Inc O 1999 2009 Icom Inc Printed on recycled paper with soy ink 1 1 32 Kamiminami Hirano ku Osaka 547 0003 Japan
57. t generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful interference to radio or television reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures Reorient or relocate the receiving antenna Increase the separation between the equipment and receiver Connect the equipment into an outlet on a circuit different from that to which the receiver is connected Consult the dealer or an experienced radio TV technician for help European harmonised standard ETS300 684 EMC product standard for Commercially Available C Versions of the IC R75 which display the CE symbol on the serial number label comply with the Amateur Radio Equipment SUPPLIED ACCESSORIES The receiver comes with the following accessories Qty D AC adapter AD 55 A S N ssssese 1 2 DC power cable OPC 869 ee 1 3 Fuse FGB 3 A internal use 1 4 Fuse FGB 3 A for DC cable 2 Either AC adapter 1 fuse or DC power cable 3 fuses are supplied depending on versions T T

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