IC-756_user.pdf

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1、INSTRUCTION MANUAL i756 HF/50 MHz ALL MODE TRANSCEIVER Downloaded by? Amateur Radio Directory? ? www.hamdirectory.info RWARNING HIGH VOLTAGE! NEVERattach an antenna or internal antenna connector during trans- mission. This may result in an electrical shock or burn. RNEVERapply AC to the DC13.8V sock

2、et on the transceiver rear panel. This could cause a fi re or ruin the transceiver. RNEVERapply more than 16 V DC, such as a 24 V battery, to the DC13.8V socket on the transceiver rear panel. This could cause a fi re or ruin the transceiver. RNEVERlet metal, wire or other objects touch any internal

3、part or connectors on the rear panel of the transceiver. This will cause electric shock. RNEVERexpose the transceiver to rain, snow or any liquids. NEVERallow children to play with the transceiver. AVOID using or placing the transceiver in areas with temperatures below 10C (+14F) or above +60C (+140

4、F). Be aware that temperatures on a vehicles dashboard can exceed 80C (+176F), resulting in per- manent damage to the transceiver if left there for ex- tended periods. AVOID placing the transceiver in excessively dusty en- vironments or in direct sunlight. AVOID placing the transceiver against walls

5、 or putting anything on top of the transceiver. This will obstruct heat dissipation. During mobile operation, DO NOT operate the trans- ceiver without running the vehicles engine. When transceiver power is ON and your vehicles engine is OFF, the vehicles battery will soon become exhausted. Make sure

6、 the transceiver power is OFF before starting the vehicle. This will avoid possible damage to the transceiver by ignition voltage spikes. During maritime mobile operation, keep the transceiver and microphone as far away as possible from the mag- netic navigation compass to prevent erroneous indica-

7、tions. BE CAREFUL! The heatsink will become hot when op- erating the transceiver continuously for long periods. BE CAREFUL! If a linear amplifier is connected, set the transceivers RF output power to less than the lin- ear amplifi ers maximum input level, otherwise, the lin- ear amplifi er will be d

8、amaged. Use Icom microphones only (supplied or optional). Other manufacturers microphones have different pin assignments and connection to the IC-756 may dam- age the transceiver. EXPLICIT DEFINITIONS READ THIS INSTRUCTION MANUAL CAREFULLYbefore attempting to operate the transceiver. SAVE THIS INSTR

9、UCTION MANUAL.This in- struction manual contains important safety and oper- ating instructions for the IC-756. PRECAUTIONS IMPORTANT i WORDDEFINITION RWARNING Personal injury, fi re hazard or electric shock may occur. CAUTIONEquipment damage may occur. NOTE If disregarded, inconvenience only. No ris

10、k of personal injury, fi re or elec- tric shock. The explicit defi nitions described at left apply to this in- struction manual. The IC-756 complies with the essential requirements of the 89/336/EEC directive for Electromagnetic Compati- bility. This compliance is based on conformity with the ETSI s

11、pecification prETS300 684 (EMC product stan- dard for Commercially Available Amateur Radio Equip- ment). UNPACKING TABLE OF CONTENTS ii qwer t Accessories included with the IC-756:Qty. q DC power cable (OPC-025A) . 1 w Hand microphone (HM-36) . 1 e Spare fuses (FGB 20 A) . 2 r Spare fuse (FGB 5 A) .

12、 1 t CW keyer plug (AP-330) . 1 IMPORTANT . i PRECAUTIONS . i EXPLICIT DEFINITIONS . i TABLE OF CONTENTS . ii UNPACKING . ii 1PANEL DESCRIPTION . 112 I Front panel . 1 I Microphone (HM-36) . 8 I LCD display . 9 I Screen menu arrangement . 10 I Rear panel . 11 2INSTALLATION AND CONNECTIONS . 1320 I U

13、npacking . 13 I Selecting a location . 13 I Grounding . 13 I Antenna . 13 I Required connections . 14 I Advanced connections . 15 I Power supply connections . 16 I Linear amplifi er connections . 17 I External antenna selector or antenna tuner connections . 18 I FSK and AFSK (SSTV) connections . 19

14、I Remote jack (CI-V) information . 20 3FREQUENCY SETTING . 2124 I When fi rst applying power (CPU resetting) . 21 I Initial settings . 21 I VFO description . 22 I Frequency setting with the tuning dial . 23 I Direct frequency entry with the keypad . 23 I Advanced tuning functions . 24 4RECEIVE AND T

15、RANSMIT. 2540 I Mode selection . 25 I Twin PBT operation . 25 I Auto notch function . 26 I Noise reduction . 26 I Noise blanker . 26 I APF function . 27 I CW reverse mode . 27 I RTTY reverse mode . 27 I CW pitch control . 27 I Filter selection . 28 I RIT and TX . 29 I Dualwatch operation . 30 I Spli

16、t frequency operation . 31 I Quick split function . 32 I Monitor function . 33 I VOX function . 33 I Meter function . 34 I Speech compressor . 34 I SWR reading . 34 I Electronic CW keyer . 35 I Memory keyer . 36 I Spectrum scope screen . 37 I Band memory (for automatic antenna selection). 37 I Repea

17、ter operation . 38 I Dial lock function . 38 I Antenna tuner operation . 39 IOptional external tuner operation. 40 5MEMORY OPERATION . 4146 I Memory channels . 41 I Memory channel selection . 41 I Memory channel screen . 42 I Memory channel programming . 43 I Frequency transferring . 44 I Memory nam

18、es . 45 I Memory clearing . 45 I Memo pads . 46 6SCANS . 4750 I Scan types . 47 I Preparation . 47 I Programmed scan operation . 48 I F scan operation . 48 I Fine programmed scan/ fi ne F scan . 49 I Memory scan operation . 49 I Select memory scan operation . 50 I Setting select memory channels . 50

19、 7CLOCK AND TIMERS . 5152 I Setting the current time . 51 I Setting power-on time . 51 I Setting power-off period . 52 I Timer operation . 52 8SET MODE . 5360 I Set mode description . 53 I Level set mode . 54 I Display set mode . 54 I Timer set mode . 55 I Miscellaneous (others) set mode . 55 9OPTIO

20、N INSTALLATIONS . 6162 I Opening the transceivers case . 61 I UT-102 VOICE SYNTHESIZER UNIT. 61 I Optional IF fi lters . 62 I CR-502 HIGH STABILITY CRYSTAL UNIT. 62 10 MAINTENANCE . 6365 I Troubleshooting . 63 I Fuse replacement . 64 I Clock backup battery replacement . 64 I Tuning dial brake adjust

21、ment . 65 I Frequency calibration (approximate). 65 11 INTERNAL VIEWS . 66 12 SPECIFICATIONS . 67 13 OPTIONS . 68 1 1PANEL DESCRIPTION I Front panel TIMER POWER TRANSMIT PHONES ELEC-KEY MIC TUNER MONITORNBNR AFBALNRRF/SQL MIC GAIN RF POWERCOMPKEY SPEED BK-IN DELAY S Po 0 10 1 11.5 23 5 9+20 +40+60dB

22、 25 50 100 SWR ALC F-1 SSB F-2F-3F-4F-5 CWRTTYAMFM HF/50MHz TRANSCEIVERi756 11 VFOVFO 14.195.000 VFOVFO USBUSB USBUSB 14.100.0014.100.00 14.205.00014.205.000 USBUSB USBUSB 14.100.0014.100.00 5656 TXTX FILTERFILTERSCANSCANMEMORYMEMORYSETSET VOXVOX OFFOFF COMPCOMP OFFOFF SCOPESCOPE ANTANT 1 1 METERMET

23、ER PoPo P.AMPP.AMP OFFOFF ATTATT OFFOFF AGCAGC MIDMID 2.4k2.4k9 92.8k2.8k455455 12:3412:34 q w e r t !3!4!5!6!7 yi!0!1!2ou q POWER SWITCH POWER/TIMER Push momentarily to turn power ON. - Turn the optional DC power supply ON in advance. Push momentarily to toggle the timer function ON and OFF. (p. 52

24、) - The power switch lights while the timer function is ON. Push for 2 sec. to turn power OFF. w TRANSMIT SWITCH TRANSMIT Selects transmitting or receiving. - The TX indicator lights red while transmitting and the RX indicator lights green when the squelch is open. e HEADPHONE JACK PHONES Accepts he

25、adphones. - When headphones are connected, the internal speaker or connected external speaker does not function. r ELECTRONIC KEYER JACK ELEC-KEY (p. 35) Accepts a paddle to activate the internal electronic keyer for CW operation. - Selection between the internal electronic keyer, bug-key and straig

26、ht key operation can be made in keyer set mode. (p. 35) - A straight key jack is separately available on the rear panel. See KEY on p. 11. - Keyer polarity (dot and dash) can be reversed in keyer set mode. (p. 35) - 4-channel memory keyer is available for your conve- nience. (p. 36) t MICROPHONE CON

27、NECTOR MIC Accepts the supplied or optional microphone. - See p. 68 for appropriate microphones. - See p. 8 for microphone connector information. y AF CONTROL AF (inner control) Varies the audio output level from the speaker. u MIC GAIN CONTROL MIC GAIN Adjusts microphone input gain. How to set the

28、microphone gain. Set the MIC control so that the ALC meter sometimes swings during normal voice transmission in SSB mode. IncreasesDecreases Recommended level for an Icom microphone MIC GAIN AFRF/SQL No audio outputMax. audio output DecreasesIncreases (dot) (com) (dash) Downloaded by? Amateur Radio

29、Directory? ? www.hamdirectory.info 2 1PANEL DESCRIPTION i RF GAIN CONTROL/SQUELCH CONTROL RF/SQL (outer control) Adjusts the RF gain and squelch threshold level. The squelch removes noise output from the speaker (closed condition) when no signal is received. - The squelch is particularly effective f

30、or FM. It is also available for other modes. - The control can be set as the RF gain control only (squelch is fixed open) or squelch control (RF gain is fi xed at maximum) in set mode as follows. (p. 56) - 11 to 12 oclock position is recommended for any set- ting of the RF/SQL control. When setting

31、as RF gain/squelch control o RF POWER CONTROL RF POWER Continuously varies the RF output power from min- imum (2 W*) to maximum (100 W*). *AM mode: 1 W to 40 W !0 BALANCE CONTROL BAL (inner control; p. 30) Adjusts the audio output balance between main and sub readout frequencies while in dualwatch.

32、!1 COMPRESSION LEVEL CONTROL COMP (p. 34) Adjusts the speech compression level in SSB. !2 NOISE REDUCTION LEVEL CONTROL NR (outer control; p. 26) Adjusts the noise reduction level when the noise re- duction is in use. Set for maximum readability. !3 NOISE REDUCTION SWITCH NR (p. 26) Toggles the nois

33、e reduction ON and OFF. Functions in SSB, CW and RTTY modes. !4 NOISE BLANKER SWITCH NB (p. 26) Toggles the noise blanker ON and OFF. The noise blanker reduces pulse-type noise such as that gen- erated by automobile ignition systems. This function cannot be used for FM, or non-pulse-type noise. !5 S

34、/RF METER (p. 34) Shows the signal strength while receiving. Shows the relative output power, SWR or ALC levels while transmitting. !6 MONITOR SWITCH MONITOR (p. 33) Monitors your transmitted IF signal. - The CW sidetone functions when MONITOR is OFF in CW mode. !7 ANTENNA TUNER SWITCH TUNER (p. 39)

35、 Turns the antenna tuner ON and OFF (bypass) when pushed momentarily. Starts to tune the antenna manually when pushed for 2 sec. - When the tuner cannot tune the antenna, the tuning circuit is bypassed automatically after 20 sec. Noise blanker OFFNoise blanker ON NBNB Noise reduction OFFNoise reduct

36、ion ON NRNR BALNR Decreases OFF Increases Compression level decreases Compression level increases COMP BALNR Increases main readout gain Increases sub readout gain IncreasesDecreases RF POWER Recommended level Minimum RF gain Adjustable range RF gain adjustable range Maximum RF gain Maximum RF gain

37、Squelch is open. S-meter squelch S-meter squelch threshold Noise squelch threshold (FM mode) ShallowDeep Squelch is open. S-meter squelch Noise squelch (FM mode) Noise squelch (FM mode) When setting as RF gain control (Squelch is fi xed open.) When setting as squelch control (RF gain is fi xed at ma

38、ximum.) NBNR BALNR COMPKEY SPEED BK-IN DELAY APF APF LOCKTX RX AUTO NOTCH TWIN PBT CW PITCH F-1 SSB F-2F-3F-4F-5 SPEECHLOCK RIT/TX TXRITCLEAR CWRTTYAMFM SPLIT MP-WMP-R DUAL WATCH VFO/ MEMO MAIN/ SUB CHANGE 1.813.5273 104145186 21724.5 8289 GENE 500 F-INPENT MW M-CL TS XFC i756 11 VFOVFO 14.195.000 V

39、FOVFO USBUSB USBUSB 14.100.0014.100.00 14.205.00014.205.000 USBUSB USBUSB 14.100.0014.100.00 5656 TXTX FILTERFILTERSCANSCANMEMORYMEMORYSETSET VOXVOX OFFOFF COMPCOMP OFFOFF SCOPESCOPE ANTANT 1 1 METERMETER PoPo P.AMPP.AMP OFFOFF ATTATT OFFOFF AGCAGC MIDMID 2.4k2.4k9 92.8k2.8k455455 12:3412:34 !8 5678

40、9 10!9234 !8 MULTI-FUNCTION SWITCHES Push to select the functions indicated in the LCD display to the right of these switches. - Functions vary depending on the operating condition. Push to input a character for memory keyer pro- gramming or memory name. (pgs. 36, 45) Toggles the antenna connector s

41、election between ANT1/R and ANT2/R when pushed. (p. 37) Toggles the receive antenna ON and OFF when pushed for 2 sec. Selects RF power (Po), SWR or ALC me- tering during transmit. (p. 34) Selects one of 2 receive RF preamps or bypasses them. - “P.AMP1” activates 10 dB preamp for HF all bands. - “P.AMP2” activates 16 dB high-gain preamp for 21 MHz band and above. What is the preamp? The preamp amplifi es received signals in the front end cir- cuit to improve the S/N ratio and sensitivity. Select “P.AMP1” or “P.AMP2” when receiving weak signals. Selects 6 dB, 12 dB or 18 dB attenuator, or byp