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INSTRUCTION MANUAL

COMMUNICATIONS RECEIVER

iR75

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Содержание IC-R75

Страница 1: ...INSTRUCTION MANUAL COMMUNICATIONS RECEIVER iR75...

Страница 2: ...placing 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 chil dren During mobile opera...

Страница 3: ...19 Optional noise reduction function 20 Optional auto notch function 20 6 MEMORY OPERATION 21 24 Memory channels 21 Memory channel selection 21 Memory channel programming 22 Frequency transferring 23...

Страница 4: ...et to the center positions when not in use y CLOCK MODE SWITCH CLOCK p 28 Toggles between frequency indication and clock in dication when pushed u ANTENNA SELECTOR SET MODE SWITCH ANT SET pgs 16 30 Wh...

Страница 5: ...en V M Memory channel selection ENT then keypad in memory name indication mode Alphanumeric input for memory name etc 6 QUICK TUNING STEP SWITCH TS pgs 12 13 Selects a quick tuning step or turns the q...

Страница 6: ...type noise such as that gen erated by automobile ignition systems This function is not effective for FM or non pulse type noise 4 AGC SWITCH AGC p 16 Toggles the AGC Automatic Gain Control time consta...

Страница 7: ...stant is selected F AGC appears when fast AGC time constant is selected AGC OFF appears when the AGC function is turned OFF F AGC blinks while scanning or while using band scope via an optional RS R75...

Страница 8: ...JACK EXT SP Connects an 8 external speaker if desired When an external speaker is connected the internal speaker does not function y MUTE CONTROL JACK MUTE Mutes audio outputs and attenuates the recei...

Страница 9: ...hock Receiver stand The base of the receiver has an adjustable stand for desktop use Set the stand to one of two angles de pending on your operating conditions Optional bracket and carrying handle DMo...

Страница 10: ...W SEL SCAN CLR LOCK AGC NB ANF NR ATT P AMP SET CLOCK ANT AD 55 A V or OPC 869 HEADPHONES REMOTE p 9 32 Used for computer control and transceive ANTENNA 2 Connect a long wire antenna impedance 500 ANT...

Страница 11: ...ntenna use ANT1 connector for connection When using a 500 long wire antenna use ANT2 terminal for connection The REC OUT jack has 350 mV rms 4 7 k output for connection to other audio equipment REC RE...

Страница 12: ...Center of Mark and Space freq CW narrow mode Setting frequency displayed freq Desired freq Center of Mark and Space freq 600 Hz LSB mode for amateur RTTY Setting frequency displayed freq Desired freq...

Страница 13: ...the displayed frequency this step can be skipped w Push on the keypad e Push the numeral keys to enter the frequency digits below 1 MHz If a key is mistakenly pushed push CLR and start again from the...

Страница 14: ...the tuning dial to set the desired tuning step for the selected mode t Push TS to exit the tuning step set mode y Rotate the tuning dial to change the frequency ac cording to the set tuning step D1 H...

Страница 15: ...rily 2 sec 2 sec 2 sec 1 MHz tuning Programmable step tuning 100 Hz 100 kHz Selectable for each mode momentarily momentarily USB R X USB R X USB R X USB R X TS SWITCH FLOW CHART Dial lock function The...

Страница 16: ...the RF SQL is set as SQL control The RF Radio Frequency gain is used to adjust the receiver gain Shallow rotation moves the S meter to the right indicating the signal strength which can be received T...

Страница 17: ...ay not function with some IF filter combina tions Not available for FM mode TWIN PBT TWIN PBT TWIN PBT IF center frequency Interference Desired signal Passband Both controls at center position Cutting...

Страница 18: ...GC momentary to toggle the AGC time constant between fast and slow F AGC appears when the fast time constant is se lected AGC appears when the slow time constant is se lected Push AGC for 2 sec to tur...

Страница 19: ...lect RTTY reverse mode q Push CW RTTY once or twice to select RTTY mode w Push CW RTTY for 2 sec to toggle between RTTY and RTTY reverse RTTY REV Check the receive signal CW pitch control The received...

Страница 20: ...mode Optional filters are not se lected by default Filter construction CFWS450E 15 kHz CFWS450HT 6 kHz FL 65 2 4 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 F...

Страница 21: ...lter Wide or narrow mode can be deactivated when 9 MHz wide or narrow filter is set to OFF 455 kHz wide or narrow filter selection does appear when 9 MHz wide or narrow filter is set to OFF r Rotate t...

Страница 22: ...display noise reduction function can be used The noise reduction function reduces noise compo nents and picks out desired signals which are buried in noise The received AF signals are converted to dig...

Страница 23: ...Yes No DUsing the UPY or ZDN keys q Push V M to select memory mode MEMO appears w Push UPY or ZDN several times to select the desired memory channel Push and hold UPY or ZDN for continuous selec tion...

Страница 24: ...equency and operating mode in VFO mode w Push UPY or ZDN several times to select the desired memory channel BLANK appears if the selected memory channel is a blank channel and does not have contents e...

Страница 25: ...IN MEMORY MODE Operating frequency 14 020 MHz CW M ch 16 Contents of M ch 16 14 018 MHz CW DTransferring in VFO mode This is useful for transferring programmed contents to VFO q Select VFO mode with V...

Страница 26: ...uts numeral 2 and letters A to C 3 inputs numeral 3 and letters D to F 4 inputs numeral 4 and letters G to I 5 inputs numeral 5 and letters J to L 6 inputs numeral 6 and letters M to O 7 inputs numera...

Страница 27: ...1 and P2 Auto memory write scan automatically memorizes paused frequencies into memory channels 80 to 99 This scan operates in VFO mode PRIORITY WATCH Repeatedly watches a memory channel This scan ope...

Страница 28: ...e can also be changed while scan ning e Set RF SQL open or closed See previous page for scan condition If the RF SQL control function is set as RF control the squelch always opens See pgs 14 30 for de...

Страница 29: ...ceived the received frequency is automatically writ ten into memory channels 80 to 99 When the auto memory write scan starts the pre viously written memory channels 80 to 99 are cleared q Select VFO m...

Страница 30: ...tically at a specified time q Push CLOCK to select clock indication mode w Push UPY to select power on timer screen Power on time and on appear e Push ANT SET for 2 sec to enter time setting condition...

Страница 31: ...tively u Push ENT to exit clock indication mode When the set time arrives the power is automatically turned OFF with 5 beeps TIMER Setting sleep timer period The receiver can be set to turn OFF automa...

Страница 32: ...he RF gain control only squelch is fixed as open or RF squelch control See p 14 for details Confirmation beep A beep sounds each time a switch is pushed to con firm it This function can be turned OFF...

Страница 33: ...dio can be adjusted to suit your preferences 300 to 900 Hz without changing the operating frequency The CW audio pitch can be adjusted in 10 Hz steps The CW audio pitch is displayed in 10 Hz steps 60...

Страница 34: ...automatically set according to the connected controller or remote controller CI V with IC 735 When connecting the IC R75 to the IC 735 for trans ceive operation you must change the operating fre quenc...

Страница 35: ...ime announcement Current time an nouncement can be deactivated if desired See p 34 for unit installation RTTY shift width This item adjusts the RTTY shift width There are 3 selectable values 170 200 a...

Страница 36: ...tronically generated voice in English or Japanese Push LOCK for 2 sec to announce the frequency etc q Remove the top cover as shown above w Remove the protective paper attached to the bot tom of the...

Страница 37: ...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 250 Hz 6 dB FL 232 RTTY CW NARROW FILTER 350 Hz 6 dB F...

Страница 38: ...elect an antenna suitable for the operating frequency Push ATT to turn the function OFF p 16 p 16 Receive audio is distorted The operating mode is not selected correctly PBT function is activated Nois...

Страница 39: ...e source of the problem and replace the dam aged fuse with a new rated fuse CAUTION DISCONNECT the DC power cable from the receiver when changing a fuse The IC R75 has 2 types of fuses installed for r...

Страница 40: ...ermediate frequencies Frequencies differ according to the selected IF filter Sensitivity 1 Preamp OFF 2 Preamp 1 ON 3 Preamp 2 ON Squelch sensitivity threshold SSB CW RTTY Less than 5 6 V 1 FM Less th...

Страница 41: ...eiver control using a personal computer You can change frequencies operating mode memory chan nels etc SP 21 EXTERNAL SPEAKER Designed for base station operation Input impedance 8 Max input power 5 W...

Страница 42: ...lt address Controller s default address Command number see table at right Sub command number see table at right BCD code data for frequency or memory number entry End of message code fixed OK MESSAGE...

Страница 43: ...kHz tuning step 100 kHz tuning step 1 MHz tuning step Sub command Command Description 00 20 11 Attenuator OFF Attenuator ON Select ANT1 Select ANT2 00 01 12 Announce with voice synthesizer 00 all dat...

Страница 44: ...P2 00 OFF 01 ON 00 LSB 01 USB 02 03 04 AM CW RTTY 10 Hz 1 Hz 1 kHz 100 Hz 100 kHz 10 kHz 10 MHz 1 MHz 1 GHz 100 MHz 0099 Data Mode Data Mode Data IF filter Data ATT Data ANT Data P AMP q w e r t y u...

Страница 45: ...name indication Expanded filter selection 9 MHz optional IF filter 455 kHz optional IF filter Set current time Power on timer Set power on time Power off timer Set power off time Sleep timer Set sleep...

Страница 46: ...Count on us 6 9 16 Kamihigashi Hirano ku Osaka 547 0002 Japan A 5580H 1EX e Printed in Japan 1999 Icom Inc...

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