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IC-756 Pro3 Manual

1. 56 57 5 FUNCTION FOR RECEIVE E Preamp The preamp amplifies received signals in the front end circuit to improve the S N ratio and sensitivity Set this to preamp 1 or preamp 2 when receiving weak signals P AMP I COCO E Attenuator The attenuator prevents a desired signal from distor tion when very strong signals are near the desired fre quency or when very strong electric fields such as from broardcasting stations are near your location ATT I fa OGO Say y lag es e CO gt Push P AMP several times to set the preamp OFF preamp 1 ON or preamp2 ON P AMP1 activates 10 dB preamp for HF all bands P AMP2 activates 16 dB high gain preamp for 24 MHz band and above Regarding the use of the P AMP 2 Pre amplifier 2 The P AMP 2 is a high gain receive amplifier When the P AMP 2 is used during times of strong electric fields distortion sometimes results In such cases use the transceiver with the P AMP 1 or P AMP OFF se
2. COMP E Speech compressor The RF speech compressor increases average RF output power improving signal strength and readabil ity in SSB e Speech compressor 1 Select USB or LSB mode 2 Push COMP momentarily to turn the speech compressor ON and OFF 3 Push COMP for 1 sec to toggle between narrow middle or wide transmit filter e Transmit filter width NAR 2 0 kHz MID 2 6 kHz WIDE 2 9 kHz e Compression level setting M Select USB or LSB mode 2 Preset the transceiver as follows COMP function METER function MIC GAIN control Center position COMP control Center position RF POWER control Max counterclockwise 3 Transmit at your normal voice level 4 Adjust the MIC GAIN control so that the ALC meter reads within the ALC zone whether or not you speak softly or loudly 5 Push COMP momentarily to turn the speech compressor ON OFF ALC During USB or LSB mode selection push COMP for 1 sec several times to select the desired trans mit filter width from wide middle and narrow The filter functions regardless of the speech compres sor use The following filters are specified as the default Each of the filter width can be re set in level set mode pgs 93 94 WIDE 100 Hz to 2 9 kHz MID 300 Hz to 2 7 kHz NAR 500 Hz to 2 5 kHz 6 Push METER once to select the COMP meter 7
3. RTTY Decode USOS RTTY Decode New Line Code CR LF gt CR LF ETTY TH USOS OH This item selects the USOS UnShift On Space func Cr OFF tion of the internal RTTY decoder Decode as letter code Decode as character code default ETTY Decode Hew Line Code This item selects the new line code of the internal RLF CR ALF CR LF RTTY decoder CR LF and CR LF CR LF only CR Carriage Return default LF Line Feed RTTY Ta USC s This item selects the FIGS insertion even changing GpH OFF from LTRS to FIGS does not necessary when send Inserts FIGS Not insert FIGS ing a numeral or symbol character agter a space default E Operating AM TRANSMIT TX indicator RX indicator Band keys 2 I N IG am O og Cam am iD ON 11 Dem T 0 m 3A Jo SSN J A L 3 non AF MIC GAIN AM FM Tuning dial Convenient functions for receive e Preamp p 57 Push P AMP several times to set the preamp OFF preamp 1 ON or preamp 2 ON P AMP1 or P AMP2 appears when the preamp 1 or preamp 2 is set to ON respectively depending on op erating frequency band e Attenuator p 57 Push ATT several times to set the attenuator in 6 dB steps ATT and atte
4. Ooo oO Qecao 088280 GI a aO OGGE CI DQ k 0000000 O EXIT SET Tuning dial F 5 OTHERS F 1 A F 2 V BASIC OPERATION 3 1 Push EXIT SET several times to close a multi function screen if necessary 2 Push EXIT SET for 1 sec to select the set mode menu screen 3 Push F 5 OTHERS to enter miscellaneous oth ers set mode 4 Push F 1 A or F 2 W to select MAIN DIAL Auto TS Rotate tuning dial to select the desired condition from high low and OFF e High Approx 5 times faster Low Approx twise faster OFF Auto tuning step is turned OFF 6 Push EXIT SET to exit the set mode Memorad Humbers MAIN DIAL Auto TS MIC UP Down SPeed Buick RIT ATR Clear SSBC Synchronous Tuning Cl Hormal Side External KeyPad 1 Push EXIT SET several times to close a multi function screen if necessary 2 Push EXIT SET for 1 sec to select the set mode menu screen 3 Push F 5 OTHERS to enter miscellaneous oth ers set mode 4 Push F 1 or F 2 W to select Beep Band edge Rotate tuning dial to turn the band edge warning beep ON and OFF 6 Push EXIT SET to exit the set mode Beef Confirmation OH BeePtBand Edge OH RF S L Control RF 50L Buick Dualwatch OH
5. 1 Make sure the transceiver power is OFF 2 While pushing M CL and F INP push POWER to turn power ON The internal CPU is reset e A D convertor calibration of the DSP unit starts and it SS Ee 003 7 Under cooler temperatures the LCD may appear takes 10 sec 7 dark and unstable after turning power ON This is e The transceiver displays its initial VFO frequencies when Y normal and does not indicate any equipment mal resetting is complete 7 function 3 Correct the set mode settings after resetting if de sired E Initial settings After resetting the transceiver set controls and switches as shown in the figure below CW Max clockwise CCW Max counterclockwise TUNER MONITOR NB NR OFF MIC GAIN 10 12 0 clock BAL Center AGC MID LOCK OFF RF POWER Max CW COMP OFF WIDE VOX BK IN EAST in EM mode RTTY FIL OFF 1 4 TONE OFF 2 Appears in some modes Turn power ON then check the display If any of the following indicators appear turn them OFF as follows e Quick tuning step indicator Y Push TS Dualwatch indicator men Push 1 Hz frequency readout Push TS for 2 sec DUAL WATCH while quick tuning e Twin peak filter indicator Push RTTY FIL step is OFF e Auto notch indicator ED Push NOTCH e RIT indic
6. amp 0 0 00 DI AF MIC GAIN O AM FM Tuning dial Convenient functions for receive e Preamp p 57 Push P AMP several times to set the preamp OFF preamp 1 ON or preamp 2 ON P AMP1 or P AMP2 appears when the preamp 1 or preamp 2 is set to ON respectively depending on op erating frequency band e Attenuator p 57 Push ATT several times to set the attenuator in 6 dB steps ATT and attenuation level appear when the attenua tor is set to ON Convenient functions for transmit e Transmit quality monitor p 64 Push MONITOR to turn the monitor function ON and OFF e Monitor indicator in MONI switch lights when the monitor function is set to ON Push EXIT SET for 1 sec then F 1 LEVEL to enter level set mode Select the monitor level item with F 1 A J F 2 W then rotate the tuning dial to adjust the monitor gain 51 1 Push a band key to select the desired band 2 Push AM FM to select FM FM indicator appears After FM mode is selected push AM FM to toggle be tween FM and AM modes 3 Rotate the tuning dial to tune a desired frequency The S meter indicates received signal strength when signal is received 10 kHz tuning step is preset for FM mode 4 Rotate AF to set audio to a comfortable listening level Push TRANSMIT or PTT microphone to trans mit The TX indicator lights
7. Convenient functions for transmit e Speech compressor p 67 Push COMP to turn the speech compressor ON and OFF e Pushing COMP for 1 sec to select the compression bandwidth from wide middle and narrow e Transmit quality monitor p 69 Push MONITOR to turn the monitor function ON and OFF e Monitor indicator in MONI switch lights when the monitor function is set to ON Push EXIT SET for 1 sec then F 1 LEVEL to enter level set mode Select the monitor level item with F 1 F 2 then rotate the tuning dial to adjust the monitor gain RECEIVE AND TRANSMIT 4 e VOX voice operated transmit p 65 Push VOX to turn the VOX function ON and OFF VOX ON appears when the VOX function is set to ON e Audio tone control p 93 Push EXIT SET for 1 sec then F 1 LEVEL to enter level set mode Select an item with F 1 A F 2 V then rotate the tuning dial to adjust the audio tone About 5 MHz band operation USA version only IC 756PROIII Tuning FCC Channel Frequency Center Frequency 5 33050 MHz 5 33200 MHz 5 34650 MHz 5 34800 MHz 5 36650 MHz 5 36800 MHz 5 37150 MHz 5 37300 MHz 5 40350 MHz 5 40500 MHz To assist you in operating the 5 MHz band correctly within the rules specified by the FCC transmission is impossible on any 5 MHz band frequency other than the 5 frequencies indicated in the table above Operation on the 5 MHz band is allowed on 5 di
8. 39 4 RECEIVE AND TRANSMIT Memory keyer send screen Pre set characters can be sent using the keyer send menu Contents of the memory keyer are set using the edit menu TRANSMIT F 1 M1 F 4 M4 ooa BBB 288 am mm D O OO CW RTTY EXIT SET Ca TEST Ca TEST DE ICOM ICOM TEST UR SNNEEH EK CFM TU Re e Transmitting 1 Push EXIT SET several times if necessary 2 Push CW RTTY to select CW mode 3 Push F 3 KEYER to select the memory keyer screen 4 Push TRANSMIT to set the transceiver to trans mit or set the break in function ON p 60 5 Push F 1 M1 F 4 M4 momentarily to trans mit the contents one time push these keys for 1 sec to transmit the contents repeatedly M1 M4 are highlighted while transmitting appears while transmitting repeatedly Set the repeat interval of the memory keyer to 1 2 3 10 or 30 sec See the previous page for keyer set mode e To count down the contact number push F 5 1 7 For your information 7 When an external keypad is connected to the pin 3 f and pin 7 of the MIC connecter the programmed 7 contents M1 M4 can be transmitted without open ing the memory keyer screen 7 See page 103 for details 6 Push EXIT SET
9. N O000000 AF MIC GAIN AM FM Tuning dial 2325 Hz 200 Hz 2125 Hz Carrier point displayed frequency When operating SSTV or PSK31 with your PC soft ware consult the manual that comes with the software 1 Connect a PC to the transceiver p 19 2 Push a band key to select the desired band 3 Push SSB or AM FM to select the desired oper ating mode 4 Push the same key for 1 sec to turn data mode ON D indicator additionally appears 5 Rotate the main dial to tune into the desired signal and decoded correctly Also use the tuning indicator of the software e During SSB data mode 1 4 tuning function can be used for critical tuning 6 Operate the PC software to transmit e When operating in SSB data mode adjust the AF output level from PC so that the ALC meter reading doesn t go outside the ALC zone Y NOTE When SSB data mode is selected the audio Z input from the ACC1 pin 6 is used for transmis G sion instead of MIC s h Tre fixed condition is used for SSB data transmis sion as follow G e COMP OFF j Tx bandwidth MID f e Tx Tone Bass 0 7 Tx Tone Trebles 0 v For your information Carrier point frequency is displayed when SSB data mode is selected See the diagram left for the tone pair example 54 55
10. 53 4 RECEIVE AND TRANSMIT E Tone squelch operation The tone squelch opens only when receiving a signal containing a matching subaudible tone You can silently wait for calls from group members using the same tone 1 Push VFO MEMO to select VFO mode 2 Push the desired band key 3 Push AM FM several times to select FM mode 4 Push TONE several times until TSQL appears in the function display 5 When the received signal includes a matching tone squelch opens and the signal can be heard When the received signal s tone does not match tone squelch does not open however the S indicator shows signal strength To open the squelch manually push XFC 6 Operate the transceiver in the normal way T To cancel the tone squelch push TONE to clear TSQL e Setting the tone squelch tone The transceiver has 50 tones from 67 0 Hz to 254 1 Hz MN Select FM mode 2 Push TONE for 1 sec to enter tone set mode 3 Push F 2 to select the tone squelch tone item 4 Rotate the tuning dial to select the desired tone squelch frequency 5 Push EXIT SET to exit tone set mode Available tone squelch tones Unit Hz 210 7 254 1 CONVENIENT Store tone squelch frequencies and ON OFF settings in memory channels for easy recall RECEIVE AND TRANSMIT 4 E Data mode SSTV PSK31 operation TRANSMIT TX indicator RX indicator Band keys
11. JD 4 000000 000 Connect to an AC outlet socket using the supplied AC cable gt 1 1 OO L OO DC power cable CONNECTING A DC POWER SUPPLY Transceiver AC outlet A DC power supply Revaz ocr i Hi an UM A Black Red socket 000000 000 OOLL2 OG Supplied DC power cable AC cable r A WARNING NEVER con nect to a battery without supplied DC fuses otherwise a fire hazard may occur NEVER connect the transceiver directly to a 24 V battery IMPORTANT Detailed installation notes for Icom mobile transceivers to be fitted into vehicles are available Contact your Icom dealer or distribu W O 000000 000 90090 00 DI E NOTE Use terminals for the cable connections red black R TTL O imp Solder battery TG RAN S Supplied S 5P DC power cable 17 2 INSTALLATION AND CONNECTIONS E Linear amplifier connections Use the ANT1 connector when connecting a linear amplifier CONNECTING THE IC PW1 To an Remote control cable supplied with the IC PW1 antenna ACC ACC cable supplied with the IC PW1 Be sure to connect the cable to the 7 pin ACC 2 jack Coaxial cable INPUT1 supplied with the IC PW1 INPUT 2 Connect INPUT 2 if necessary Coaxial cable optional ANT2 ee sj VU f den o OG 0090 OO AC outlet Ground Transceiver Non European ve
12. Push EXIT SET several times to close a multi function screen if necessary 2 Push EXIT SET for 1 sec then F 4 TIME to enter timer set mode 3 Push F 1 A or F 2 W to select the Power ON Timer Set item Time Wows CLOCK2 Function CLOCK2 Offset Timer Function Power OFF Period E Setting power off period The transceiver can be set to turn OFF automatically after being activated via the power on timer The power off period can be set to 5 120 min in 5 min steps 1 Push EXIT SET several times to close a multi function screen if necessary 2 Push EXIT SET for 1 sec then F 4 TIME to enter timer set mode 3 Push F 2 W to select the Power OFF Period item Time How CLOCK2 Function CLOCK2 Offset Timer Function Power OH Timer Set E Timer operation 1 Preset the power on time and power off period as described previously 2 Push POWER momentarily to turn the timer func tion ON The POWER light lights when the timer function is ON POWER 4 Set the desired power on time using the tuning dial TIMER set Push SET blinks Time How CLOCK2 Function CLOCKZ Offset Timer Function SH4 19 30 Power OFF Perisd 2 TN TIMER set Push SET Z 5 Push F 4 SET to enter the set time e Push EXIT SET to cancel the setting 6 Push EXIT SET twice to exit timer set mode 4 Set the desired power off time using the tuning dia
13. cccccceeeeeseeeeeeeeeseeeeeeeeens 80 E Memo ACS EEE 81 I SCANS Lunnan 82 86 E Scan types REE 82 E Preparation cccccccccssecseecseeceseceseeseeesseess 82 E Programmed scan operation sss 83 E AF scan operation cccecceeeceeeeeeeeeeeeeeeees 83 E Fine programmed scan ME 84 E Memory scan operation rrrrrrnnrrrrnnvrvnnnverennn 84 E Select memory scan operation rrrrrrnnnnrnnn 85 E Setting select memory channels 0 85 E Scan set mode rrrrarernnnrrnnnnrnnnnnvnnnennnnennnnene 86 E Tone scan ieteceeezcestecesszdeiandarcdestoidessentaaetescestaees 86 10 ANTENNA TUNER FUNCTIONS 000 87 89 E Automatic antenna selection sessen 87 E Antenna tuner operation rrrrrrrrnnevnnrnnnnennnen 88 E Optional external tuner operation 89 11 CLOCK AND TIMERS rnnnnnnnnnvvvvnnvevenennnnnnnnnn 90 91 Mi Setting the Current time cccseeeeeeeeeeeeeees 90 E Timer function activity rrrrnnnnrrrnnrrnrnnnnennnn 90 E Setting power on time rrrrrrrrnnnrvernrnvrvrnnnnvnn 91 E Setting power off period rrrrnnnrnrnnnrrrnnnnennnn 91 ME Timer operation cccccceeccsseeceeeeeeeseeeeseeess 91 eT MODE Le 92 103 E Set mode description rrnrrrrrnnnrrrnnnrnrnnnnennnn 92 MI Level set mode rrrnrnnnnnnnnnnnnnnnnrnvnnnnnnnnnnennn 93 Mi Display Set mode rrrnnnnnnnnnnnnnnnnenvnnnennnnnnennnn 95 E DSP filter set mode rrrrr
14. i id 188 Be SPLITI USE 3 Rotate the tuning dial to set the transmit fre quency or input the transmit frequency using the keypad and ENT or input a shift frequency using the keypad and SPLIT The transmit frequency can be monitored while pushing XFC or using dualwatch i PEE 0 USB i PRACTICAL EXAMPLE When you receive a pile up and you want to start split frequency operation to simplify picking out sta tions 1 Push SPLIT momentarily and push CHANGE for 1 sec The sub readout frequency is equalized to the main readout frequency and appears 2 Rotate the tuning dial to set your receive fre quency in the main readout 3 Announce your receive frequency 4 After you catch one of the calling stations call signs push and hold the PTT switch to respond e While pushing XFC you can monitor your transmit frequency VOICE RECORDER FUNCTIONS E Digital voice recorder The transceiver has a total of 8 memory channels 4 each for transmit and receive of digital voice memo ries A maximum message length of 15 sec can be recorded in each receive channel and a total message length of 90 sec can be recorded in transmit channels e Recording a received audio 1 Push EXIT SET several times to close a multi function screen if necessary 2 Select the desired mode by pushing SSB CW RT TY or AM FM 3 Push F 2 VOICE to call up the voice recorder screen If the
15. 3 Push the desired band key 4 Push AM FM several times to select FM mode 5 Set the receive frequency repeater output fre quency 12 00 6 Push SPLIT for 1 sec to start repeater operation Repeater tone is turned ON automatically e Shifted transmit frequency and TX appear in the sub readout The transmit frequency can be monitored while pushing XFC or using dualwatch WFO FIL TONE wo y i p PME 7 SEL T Ta QL BLENDE HEG tC UFO FM ae woti p Tone encoder is auto matically turned ON Shifted frequency appears 7 Push and hold PTT to transmit release PTT to receive To return to simplex push SPLIT momentarily to clear the sub display RECEIVE AND TRANSMIT 4 e Setting the repeater tone Some repeaters require subaudible tones to be ac cessed Subaudible tones are superimposed over your normal signal and must be set in advance The transceiver has 50 tones from 67 0 Hz to 254 1 Hz Each memory channel can store an independent set ting MN Select FM mode 2 Push TONE for 1 sec to enter tone set mode 3 Push F 1 to select the repeater tone item 4 Rotate the tuning dial to select the desired re peater tone frequency 5 Push EXIT SET to exit tone set mode Unit Hz 210 7 254 1 Available repeater tones CONVENIENT Store repeater tone frequencies and ON OFF settings in memory channels for easy recall 52
16. A NEVER apply more than 16 V DC such as a 24 V battery to the DC13 8V jack on the transceiver rear panel This could cause a fire or ruin the transceiver NEVER let metal wire or other objects touch any internal part or connectors on the rear panel of the transceiver This may result in an electric shock NEVER expose the transceiver to rain snow or any liquids NEVER installing the transceiver in a place with out adequate ventilation Heat dissipation may be af fected and the transceiver may be damaged A NEVER operate or touch the transceiver with wet hands This may result in an electric shock or damage the transceiver AVOID using or placing the transceiver in areas with temperatures below 10 C 14 F or above 50 C 122 F Be aware that temperatures on a vehicle s dashboard can exceed 80 C 176 F 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 or putting anything on top of the transceiver This will obstruct heat dissipation Place unit in a secure place to avoid inadvertent use by children During mobile operation DO NOT operate the trans ceiver without running the vehicle s engine When transceiver power is ON and your vehicle s engine is OFF the vehicle s battery will soon become ex hausted Make s
17. If a fuse blows or the transceiver stops functioning try to find the source of the problem and replace the dam aged fuse with a new rated fuse 7 CAUTION DISCONNECT the DC power cable G from the transceiver when changing a fuse The IC 756PROIII has 2 types of fuses installed for transceiver protection e DC power cable fuses rrrrnnnnrnnnnrnnnnrnnnnnnr FGB 30 A e Circuitry MUSE ncicnsanteciesansdicietaadetediaseanedacwediqate FGB5A CIRCUITRY FUSE REPLACEMENT The 13 8 V DC from the DC power cable is applied to all units in the IC 756PROIII except for the power amplifier through the circuitry fuse This fuse is in stalled in the PA unit 1 Remove the top cover as shown on p 104 2 Remove 11 screws from the PA shielding plate then remove the plate Push LOCK SPEECH to turn the function OFF p 64 e Push EXIT SET several times to exit the set pgs 10 mode screen e Reset the CPU DC POWER CABLE FUSE REPLACEMENT 3 Replace the circuitry fuse as shown in the diagram below 4 Replace the PA shielding plate and top cover Circuitry fuse FGB 5 A E Clock backup battery replacement The transceiver 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 trans ceiver transmits and receives normally but cannot re t
18. WFO USB Push for 1 sec Set mode menu screen qr qot p WFO USB SETMODE 12 EE 5 Push F 1 A or F 2 W to select the desired item 6 Set the desired condition using the tuning dial e Push F 3 DEF for 1 sec to select a default condition or value 7 For timer set mode push F 4 SET to enter the set time Push EXIT SET twice to exit the set mode o o O O O o O e Display set mode p 95 DISPLAY SET Bright LCD 4 Horizon Back light lt Switches3 DisPlay TyPe DisPlay Font Memory Name e DSP set mode p 96 CLOCK2 Function CLOCK2 Offset Timer Function Power OH Timer Set Power OFF Period BeeP Confirmation BeertBand Edge RF S L Control Quick Dualwatch Quick SPRIT FM SPLIT Offset lt H ie re 92 93 12 SET MODE E Level set mode S56 Tx Tone Bass This item adjusts the bass level of the transmit audio tone in SSB mode from 5 dB to 5 dB in 1 dB steps 55B Tx Tone Treble This item adjusts the treble level of the transmit audio tone in SSB mode from 5 dB to 5 dB in 1 dB steps sob TEL WILE L These items set the transmission passband width for wide setting by selecting the lower and higher fre quencies Lower freq 100 default 300 and 500 Hz sob TEL WILE H These items set the transmission passband width for wide setting by selecting the lower and higher fre quencies Higher freq 2500 2700 and 2900 Hz de
19. 5 E Spectrum scope screen This function allows you to display the relative strengths of signals around the center frequency The span can be set to 12 5 KHz 25 KHz 50 kHz and 100 kHz Ideal for monitoring band conditions in an instant Push EXIT SET several times to close a multi function screen if necessary 2 Push F 1 SCOPE to select the scope screen 3 Push F 1 SPAN several times to select the scope span 4 Push F 2 ATT several times to activate an atten uator or turn the attenuator OFF 10 20 and 30 dB attenuators are available Push F 3 MARKER several times to select the marker sub readout or transmit frequency or turn the marker OFF TX MARKER displays the marker at the transmit fre quency SUB MARKER displays the marker at the sub readout frequency Sub readout Appears when the marker is out of range or TX marker Appears when the marker is out of range 6 Push F 4 HOLD to freeze the current spectrum waveform HOLD appears while the function is in use 7 Push EXIT SET to exit the scope screen FUNCTION FOR RECEIVE e Spectrum scope during transmitting The spectrum scope shows the transmit signal wave form while transmitting This can be deactivated if de sired When OFF is selected the spectrum scope holds the received waveform while transmitting and does not show the transmit waveform 1 Call up the scope screen as d
20. Buick SPLIT OH FM SPLIT Offset iHF gt A 1B 8MHz FM SPLIT Offset SeM3 A 166MHz 28 3 BASIC OPERATION E Operating mode selection SSB LSB USB CW CW R CW reverse RTTY RTTY R RTTY reverse AM and FM Data modes of SSB AM and FM are also available in the IC 756PROIII Select the desired operation mode as fol lows To select a mode of operation push the desired mode switch momentarily Push the switch again to toggle between USB and LSB CW CW R and RTTY RTTY R AM and FM if necessary Push the switch for 1 sec to toggle between CW and CW R RTTY and RTTY R or to select data mode if necessary See the diagram below left for the order of selection 7 Microphone signals are muted when data mode is Y f selected Push mode switch Push mode switch for 1 sec momentarily E Volume setting 7 o O Oa Audio output increases Audio output decreases 29 2880 O 00 Mode selection e Selecting SSB mode Push SSB to select USB or LSB e USB is selected first when above 10 MHz or LSB is selected first when below 10 MHz operation USB is selected when 5 MHz
21. F 5 OTHERS to enter miscellaneous oth ers set mode 7 Push F 1 4 several times to select the Calibra tion marker item Rotate the tuning dial clockwise to turn the calibra tion marker ON Side tone may be heard BeeP Confirmation BeePCBand Edges RF S L Control Buick Dualwatch Buick SPRIT FM SPLIT Offset lt HF gt 9 Adjust the calibration pot on the right side panel of the transceiver for a zero beat with the received standard signal as shown below Zero beat means that two signals are exactly the same frequency resulting in a single tone being emitted QD D jJ JO C A S LE Rotate the tuning dial counterclockwise to turn the calibration marker OFF Push EXIT SET twice to exit set mode INTERNAL Views 15 ME e Top view lt _ _ Internal antenna PA unit en PA fuse FGB 5 A FILTER unit WOU Bottom view RF unit BPF unit EH M E ease 1 ta Clock backup battery og PRE AMP unit GT SPCH oe Optional voice rt synthesizer level adj Space for optional voice synthesizer K UT 102 PLL unit S a DSP unit TE ee z Had J O O O UD FORTEST Tp Ti NOM JER 108 16 CONTROL COMMAND E Remote jack CI V information CI V connection example The transceiver can be connected through an optional IC 756PROIII CT 17 CI V LEVEL CONVERTER to a personal computer equipped with an RS 232C port The Icom
22. M ch 16 Contents of M ch 16 14 018 MHz CW CD 16 mere Fiz Lee oP AA MEMO Programmed contents appear E Memory names All memory channels including scan edges can be tagged with alphanumeric names of up to 10 charac ters each Capital letters small letters numerals some symbols CES VA 2 A4 K 5 lt gt FI_ and spaces can be used Editing programming memory names G Push EXIT SET several times to close a multi function screen if necessary 2 Push F 4 MEMORY to select the memory chan nel screen ekke u Ga UF FIL oe es t NN WFO USE Pi 8 586 668 LSE FL2 SCAN EDGE P2 29 999 99 USB FL2 SCAN EDGE 1 14 188 88 USE FL2 2 Sooo ae eee 3 3 Select the desired memory channel E Memory clearing Any unnecessary memory channels can be cleared The cleared memory channels become blank chan nels 1 Select memory mode with VFO MEMO 2 Select the desired memory channel with A V 3 Push M CL for 1 sec to clear the contents The programmed frequency and operating mode dis appear 4 To clear other memory channels repeat steps and 3 MEMORY OPERATION 8 4 Push F 4 NAME to edit memory channel name cursor appears and blinks e Memory channel names of blank channels cannot be edited WFO USB qgqrwopt Selected character 99 566 84 LSB FL2 SCAN EDGE Pi P2 29 999 99 USB FL2_ W LOH EDGE Character J gt ECS USE
23. Push AGC several times to select AGC fast AGC medium MID or AGC slow Medium AGC time constant Slow AGC time constant Fast AGC time constant e Selectable AGC time constant unit sec 2 0 MID 0 1 0 2 0 3 0 5 0 8 1 2 er eee 2 0 2 5 3 0 4 0 5 0 6 0 RTTY 0 5 MID 0 5 MID 0 0 1 0 2 0 3 0 5 0 8 1 2 1 0 5 MID 6 2 0 2 5 3 0 4 0 5 0 6 0 OFF 0 1 0 2 0 3 0 5 0 8 1 2 0 5 MD lg 2 0 2 5 3 0 4 0 5 0 6 0 2 GLOW patra 2 SLOW zoran 5 0 MID 2 0 3 0 5 0 8 1 2 1 6 2 0 pacts 3 0 4 0 5 0 6 0 7 0 8 0 e Setting the AGC time constant 1 Select the desired mode except FM mode 2 Push AGC for 1 sec to enter AGC set mode 3 Push AGC several times to select FAST time constant 4 Rotate the tuning dial to set the desired time con stant for AGC FAST AGC time constant can be set between 0 1 to 8 0 sec depends on mode or turned OFF e Push F 3 DEF to select a default value 5 Push AGC to select medium time constant 6 Rotate the tuning dial to set the desired time con stant for AGC MID AGC time constant can be set between 0 1 to 8 0 sec depends on mode or turned OFF e Push F 3 DEF to select a default value 7 Push AGC to select slow time constant Rotate the tuning dial to set the desired time con stant for AGC SLOW AGC time constant can be set between 0 1 to 8 0 sec depends on mode
24. Pushing MP R calls up the frequency and operating mode in a memo pad and the temporary pad sequen tially Frequency and mode before pushing MP R r E Scan types TARL PROGRAMMED SCAN Repeatedly scans between two scan edge frequencies scan edge memory channels P1 and P2 Scan edge P2 or P1 Scan edge P1 or P2 This scan operates in VFO mode MEMORY SCAN Repeatedly scans all programmed memory channels Blank channel ar select ar select ar select This scan operates in memory mode E Preparation e Channels For programmed scan Program scan edge frequencies into scan edge mem ory channels P1 and P2 For AF scan Set the AF span AF scan range in the scan screen 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 mem ory channels To designate the channel as a select memory channel choose a memory channel then push F 3 SELECT in the scan screen memory mode or in the memory channel screen e Scan resume ON OFF You can select the scan to resume or cancel when de tecting a signal in set mode Scan resume ON OFF must be set before operating a scan See p 86 for ON OFF setting and scan resume condition details 1 SCANS The scan function can be used on the main readout only You can operate a scan while operating on a frequency using the dualwatch or split fu
25. SELECT MEMORY CHANNEL INDICATOR p 85 Indicates the displayed memory channel is set as a select memory channel MULTI FUNCTION SWITCH GUIDE Indicates the function of the multi function switches LCD FUNCTION SWITCH GUIDE Indicates the function of the LCD function switches F 1 F 5 MULTI FUNCTION SCREEN p 10 Shows the screens for the multi function digital meter spectrum scope voice recorder memory channel scan memory keyer RTTY decoder IF fil ter selection or set modes etc MEMORY CHANNEL READOUTS p 76 Show the selected memory channel contents in VFO mode Show the VFO contents in memory mode FREQUENCY READOUTS p 25 Show the operating frequency e Outline characters are used for non accessing readout CLOCK READOUT p 90 Shows the current time e Dualtime indication is available RTTY TUNING INDICATOR p 47 Shows the tuning level in RTTY mode QUICK TUNING INDICATOR p 26 Appears when the quick tuning step function is in USE PASSBAND WIDTH INDICATOR p 60 Graphically displays the passband width for twin PBT operation and center frequency for IF shift op eration IF FILTER INDICATOR p 61 Shows the selected IF filter number SHIFT FREQUENCY INDICATOR p 60 Shows the shift frequency of the IF filter MODE INDICATOR p 29 Shows the selected mode BAND WIDTH INDICATOR p 61 Shows the passband width of the IF filter PANEL DESCRIP
26. USB side 102 103 12 SSET MODE E Miscellaneous others set mode continued External kes ad This item sets the external keypad capability and Hut Pushing one of external keypad function switches transmits the desired voice memory during a phone mode SSB For your information AM or FM or memory keyer contents The following diagram shows the equivalent circuit of during CW mode operation an external keypad and connects to the pin 3 and WOICE PLAY ETH p a am ala un kunn m aa I a ras pin 7of the MIC connector p 18 Pee Grenar Keran switches transmits the desired voice pe eS Le memory contents during a phone mode operation KEVER SEND Pushing one of external keypad switches transmits the desired keyer memory contents during CW mode operation External keypad does not function default ll Baud Rate This item sets the data transfer rate 300 1200 4800 utc SAA 9600 19200 bps and Auto are available ETR 19200 bps When Auto is selected the baud rate is automati deig cally set according to the connected controller or re mote controller W Address To distinguish equipment each CI V transceiver has BE rer its own Icom standard address in hexadecimal code Address of 6Eh Address of 7Fh The IC 756PROIII s address is 6Eh default When 2 or more IC 756PROIII s are connected to an optional CT 17 ci v LEVEL CONVERTER rotate the tun ing dial to select a different ad
27. passband tuning p 60 Rotate TWIN PBT controls inner outer e Push PBT CLR to clear the settings e Noise reduction p 64 Push NR switch to turn the noise reduction ON and OFF e Rotate NR control to adjust the noise reduction level e Noise reduction indicator in NR switch lights when the noise reduction is set to ON e AGC auto gain control p 59 Push AGC switch several times to select AGC FAST AGC MID or AGC SLOW Push AGC for 1 sec to enter the AGC set mode Rotate tuning dial to adjust the time constant e 1 4 function p 27 Push 1 4 to turn the 14 function ON and OFF 44 45 4 RECEIVE AND TRANSMIT About RTTY 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 RITY signal correctly select RTTY R RTTY Reverse mode Reverse I i 2125 Hz Normal 2125 Hz Space Mark BFO BFO Space Mark RTTY filter Twin peak filter The transceiver has 5 RTTY filters in addition to nor mal IF filters The passband width can be selected from 1 kHz 500 Hz 350 Hz 300 Hz and 250 Hz When the RTTY filter is turned ON the RTTY tuning meter can be used p 47 Moreover the twin peak filter changes the receive fre quency response by boosting 2 particular frequencies 2125 and 2295 Hz for
28. r NOTE a ig used to transmit a following word with no space such as AR Put before a text string such as AR and the string AR is sent with no space x is used to insert the CW contest number The contest number automatically increments by 1 This function is only available for one memory keyer channel at a time Memory keyer 7 channel M2 used x by default SSS 7 Select the desired character by rotating the tuning dial or by pushing the band key for number input e Push F 1 or F 2 for cursor movement e Push F 3 DEL to delete the selected character Push F 4 SPACE to input a space is for contact numbers and can be input for the count up trigger channel ig appears Repeat step until the desired contents are input 9 Push F 5 M1 M4 to select the next memory channel and repeat step for character input if desired Push EXIT SET twice to exit the keyer set mode 40 4 RECEIVE AND TRANSMIT Contest number set mode This menu is used to set the contest serial number e Setting the contact serial number and count up trigger etc Contact number can be automatically transmitted F 3 DEL from one of the memory keyer channels The Morse cut numbers can be used as the contact numbers hoeg The maximum number for contact numbers is 9999 1 Push EXIT SET several times if necessary 2 Push C
29. twice to exit the memory keyer screen Editing a memory keyer The contents of the momory keyer memories can be set using the memory keyer edit menu The memory keyer can memorize and re transmit 4 CW key codes for often used CW sentences contest number etc Total capacity of the memory keyer is 70 characters per memory channel 123 etc ABC F 3 DEL F 4 SPACE I CO O0D0 NS poco Se Selected character mi gt P ONE mr BE Character ia CFM TU group keys QRZ Memory ch select e Pre programmed contents CQ TEST CQ TEST DE ICOM ICOM TEST UR 5NN BK M3 CFM TU ya RECEIVE AND TRANSMIT 4 e Programming contents 1 Push EXIT SET several times if necessary 2 Push CW RTTY to select CW mode 3 Push F 3 KEYER then EXIT SET to select keyer set mode 4 Push F 2 EDIT to enter the keyer edit screen 5 Push F 5 M1 M4 several times to select the de sired keyer memory channel 6 Select the desired character group by pushing the character group keys ABC 123 or etc several times e etc appears when 123 is pushed when 123 char acter group is selected e Selectabel characters with the tuning dial Key selection Editable characters A to Z capital leters 0 to 9 numbers nr
30. wq ea io 14 188 8 4 Now you can receive on 21 290 MHz and transmit on 21 310 MHz To change the transmit and receive frequencies push CHANGE to exchange the main and sub readouts FUNCTION FOR TRANSMIT 6 CONVENIENT DIRECT SHIFT FREQUENCY INPUT The shift frequency can be entered directly DM Push F INP Q Enter the desired shift frequency with the digit keys 1 kHz to 1 MHz can be set When you require a minus shift direction push in advance 3 Push SPLIT The shift frequency is input in the sub readout and the split function is turned ON EXAMPLE To operate on 1 kHz higher frequency Ene 3 euT To operate on 3 kHz lower frequency CONVENIENT DUALWATCH FUNCTION The dualwatch function is convenient for tuning the transmit frequency while monitoring both frequencies used for transmitting and receiving CONVENIENT SPLIT LOCK FUNCTION Accidentally releasing the XFC switch while rotating the tuning dial changes the receive frequency To pre vent this use both the split lock and dial lock func tions to change the transmit frequency only The split lock function cancels the dial lock function while push ing XFC during split frequency operation The dial lock s effectiveness during split frequency op eration can be selected in the set mode for both re ceive and transmit frequencies or only the receive frequency p 99 70 71 6 FUNCTION FOR TRANSM
31. 166 8660 USB FL2 appears when the memory channel is selected 4 Push EXIT SET to exit the memory channel screen e Setting a memory channel as a select memory Select memory channels are used for select memory scan Select memory scan repeatedly scans the se lect memory channels only This is useful to speed up the memory scan interval Of course select memory channels are also scanned during normal memory scan 1 Select the memory channel screen as described at left 2 Rotate the tuning dial while pushing F 1 ROLL or F 2 SET to select the desired memory chan nel A and V can also be used 3 Push F 3 SELECT to set the memory channel as a select memory or not a I ER iLe r l r WFO USB FIL2 r wpet 99 Fi 0 500 080 LSB FLZ SCAN EDGE P2 29 999 99 USB FLZ SCAN EDGE gt ix 14 100 00 USB FL2 24 3 4 air appears for select memory channel 4 Repeat steps 2 to to program another memory channel as a select memory channel if desired Push EXIT SET to exit the memory channel screen Y Setting select memory channels is also possible in Y the scan screen MEMORY OPERATION 8 E Memory channel programming Memory channel programming can be preformed ei ther in VFO mode or in memory mode Programming in VFO mode EXAMPLE Programming
32. 7 Deep rotation of the NR control results in audio Y signal masking or distortion Set the NR control Y for maximum readability E Dial lock function The dial lock function prevents changes by accidental movement of the tuning dial The lock function elec tronically locks the dial Push LOCK SPEECH to toggle the dial lock func tion ON and OFF The LOCK indicator lights when the dial lock function is in use FUNCTION FOR RECEIVE 5 7 While operating the manual notch noise may be Y heard This comes from the DSP unit and does not 7 indicate an equipment malfunction Auto notch OFF Auto notch ON Desired Desired signal AF signal AF Unwanted tone frequency Particular frequency is attenuated Noise reduction activated BAL NR Noise reduction OFF BAL NR Noise components Desired signal CW LOCK indicator LOCK SPEECH switch 64 Mm O FUNCTION FOR TRANSMIT E VOX function The VOX Voice Operated Transmission function switches between transmit and receive with your voice This function provides an opportunity to input log en tries into your computer etc while operating Using the VOX function 1 Select a phone mode SSB AM FM 2 Push VOX to turn the VOX function ON or OFF geso
33. Adjust the COMP control so that the COMP meter reads within 10 dB and 20 dB COMP meter 7 When the ALC meter peaks above the ALC zone 4 your transmitted voice may be distorted METER switch MIC GAIN control RF POWER control COMP switch COMP control E ATX function The ATX function shifts the transmit frequency up to 9 999 kHz in 1 Hz steps 10 Hz steps when can celling the 1 Hz step readout without moving the re ceive frequency See on p 5 for function description CLEAR IOGOOO 8 AN ad ATX RIT ATX 7 When RIT and ATX are ON at the same time the ZZ RIT ATX control shifts both the transmit and re Y ceive frequencies from the displayed frequency at 7 the same time e Calculate function The shift frequency of the RIT or ATX function can be added subtracted to the displayed frequency While displaying the RIT and or ATX shift frequency push RIT or ATX for 1 sec FUNCTION FOR TRANSMIT 6 GA Push ATX switch e and the shifting frequency appear when the function is ON 2 Rotate the RIT ATX control RIT ATX Low shift High shift 3 To reset the ATX frequency push CLEAR for 1 sec e Push CLEAR momentarily to reset the RIT frequency when the quick RIT ATX c
34. Maximum RF gain Adjustable range Minimum RF gain 7 x e When functioning as squelch control RF gain is fixed at maximum Noise squelch Noise squelch FM mode threshold S meter squelch Ge ay threshold Squelch is S meter open squelch Shallow Deep 7 While rotating the RF gain control noise may be Y heard This comes from the DSP unit and does not 7 indicate an equipment malfunction NNN PANEL DESCRIPTION 1 RF POWER CONTROL RF POWER Continuously varies the RF output power from min imum 5 W to maximum 100 W AM mode 5 W to 40 W Decreases Increases RF POWER O S RF METER p 31 Shows the signal strength while receiving Shows the relative output power SWR ALC or compres sion levels while transmitting MONITOR SWITCH MONITOR p 69 Monitors your transmitted IF signal The CW sidetone functions regardless of the MONI TOR switch setting in CW mode The MONITOR indicator in this switch lights green when the function is activated G amp ANTENNA TUNER SWITCH TUNER p 88 Turns the internal antenna tuner ON and OFF bypass when pushed momentarily Tunes the antenna manually when pushed for 1 Sec The TUNER indicator in this switch lights red when the function is activated or blinks during manual tun ing wach the tuner cannot tune the antenna the tuning circuit is bypassed automatically after 20 sec 1 PANEL DESCRIPTION E Front panel continue
35. ON and OFF e RIT and or ATX also functions in 1 Hz tuning step when used OG ooog ooog oecear coca 1 Hz step indicator USE ppo UFO USB Tuning dial 1 4 tuning function SSB data CW RTTY only While operating in SSB data CW RTTY the 1 4 tuning function is available for critical tuning Dial rotation is reduced to 1 4 of normal when the 1 4 function is in Push 1 4 to toggle the 14 function ON and OFF gt j O COCO O Y tuning function OFF Y tuning function ON D00000 193 Pic Auto tuning step function When rotating the tuning dial rapidly the tuning speed accelerated automatically as selected OB 8 OGeG ogee G CD OO CO 00 aG OOGO F 1 A F 2 V EXIT SET Tuning dial F 5 OTHERS Band edge warning beep When selecting a frequency that lies outsideof a band s specified frequency range a warning beep sounds This function can be turned OFF in set mode if de sired
36. TX MEM to select RTTY memory screen 5 Push F 5 1 4 5 8 to select memory bank then push one of the function keys F 1 RT1 to F 4 RT4 or F 1 RT5 to F 4 RT8 The selected memory contents will be transmitted im mediately RTTY tuning meter SSG a IN TD WFO FIL ae ae WFO USE Q Editing RTTY memory The contents of the RT TY memories can be set using the memory edit menu The memory can memorize and re transmit 8 RTTY contents for often used RTTY sentences Total capacity of the memory is 70 char acters per memory channel 123 etc ABC I F 3 DEL F 4 SPACE 1 Cj JCS F 1 4 F 2 EXIT SET F 5 RT1 8 Selected character Character group keys Memory ch select e Pre programmed contents RT5 4173 GL SKJ RT6 JCQ CQ CQ DE ICOM ICOM ICOM K4 RT7 blank RT8 blank RECEIVE AND TRANSMIT 4 e Programming contents 1 Push EXIT SET several times if necessary Q Push CW RTTY to select RTTY mode 3 Push F 3 JDECODE then F 1 MENU14 to select the RTTY decode menu 2 4 Push F 2 EDIT to enter the RTTY memory edit screen 5 Push F 5 RT1 8 several times to select the de sired memory channel 6 Select the desired character group by pushing the character group keys ABC 123 or etc several t
37. Varies the audio output level from the speaker AF RF SQL Decreases 1 Increases No audio output Max audio output MIC GAIN CONTROL MIC GAIN Adjusts microphone input gain The transmit audio tone in SSB mode can be adjusted in set mode p 93 How to set the microphone gain Set the MIC control so that the ALC meter sometimes swings during normal voice transmission in SSB mode Recommended level for an Icom microphone Ss Decreases Increases MIC GAIN 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 re ceived The squelch is particularly effective for FM It is also available for other modes 12 to 1 o clock position is recommended for any setting of the RF SQL control The control can be set as Auto RF gain control in SSB CW and RTTY squelch control in AM and FM or squelch control RF gain is fixed at maximum in set mode as follows p 98 SET MODE SETTING O RF GAIN SQL RF GAIN RF GAIN SQL RF GAIN SQL When setting as RF gain squelch control Noise squelch FM mode Hh Recommended level av AN Maximum N RF gain 4 Squelch eee open RF gain amp adjustable range S meter squelch e When functioning as RF gain control Squelch is fixed open SSB CW RTTY only X
38. band is selected for the USA version After USB or LSB is selected push SSB to toggle be tween USB and LSB After USB or LSB is selected push SSB for 1 sec to select USB D or LSB D mode respectively e Selecting CW RTTY mode Push CW RTTY to select CW or RTTY After CW or RTTY is selected push CW RTTY to tog gle between CW and RTTY After CW or RTTY is selected push CW RTTY for 1 sec to toggle between CW and CW reverse or RTTY and RTTY reverse mode respectively e Selecting AM FM mode Push AM FM to select AM or FM After AM or FM is selected push AM FM to toggle be tween AM and FM After AM or FM is selected push AM FM for 1 sec to select AM D or FM D mode respectively Rotate AF control clockwise to increase counter clockwise to decrease the audio output level e Set a suitable audio level BASIC OPERATION 3 E Squelch and receive RF sensitivity Adjusts the RF gain and squelch threshold level The squelch removes noise output from the speaker i 228358 closed position when no signal is received OSSD The squelch is particularly effective for FM It is also avail oS able for other modes 12 to 1 o clock position is recommended for any setting of the RF SQL control z gt The contr
39. better copying of desired RT TY signals 1 Push CW RTTY once or twice to select RTTY mode 2 Push RTTY FIL to turn the RTTY filter ON TPF appears when the twin peak filter is turned ON e RTTY filter selection Push EXIT SET several times to close a multi function screen if necessary Q Select RTTY mode 3 Push RTTY FIL for 1 sec to enter RTTY filter set mode 4 Push F 1 4 to select band width item 5 Rotate the tuning dial to select the RTTY filter width from 1 KHz 500 Hz 350 Hz 300 Hz and 250 Hz e Push F 3 DEF for 1 sec to select a default value 6 Push F 2 to select twin peak filter item The received audio volume may become greater when the twin peak filter is turned ON 7 Rotate the tuning dial to turn the twin peak filter function ON or OFF G Push CW RTTY once or twice to select RTTY mode 2 Push CW RTTY for 1 sec to select RTTY or RTTY R mode Check the receive signal Push EXIT SET to exit the RTTY filter set mode RTTY FIL CW RTTY TPF indicator 35 a N GI QD UFO 2 Functions for the RTTY decoder indication The transceiver has an RT TY decoder for Baudot mark freq 2125 Hz shift freq 170 Hz 45 bps An external terminal unit TU or terminal node con troller TNC is not necessary for receiving a Baudot signal G Push EXIT SET several times to close a multi function screen if necessary 2 P
40. body on and solder it Screw the coupling ring onto the connecior body E 30mmz in 10mm in 1 2 mm ein Antenna SWR Each antenna is tuned for a specified frequency range and SWR may be increased out of range When the SWR is higher than approx 2 0 1 the transceiver s power drops to protect the final transis tor In this case an antenna tuner is useful to match the transceiver and antenna Low SWR allows full power for transmitting even when using the antenna tuner The IC 756PROIII has an SWR meter to mon itor the antenna SWR continuously INSTALLATION AND CONNECTIONS 2 E Required connections e Front panel N TWIN PBT COMP dB ALC O ICOM IC 756PROII TUNER MONITOR NB NR ooooooo A straight key can be used when the internal electronic keyer is turned OFF in keyer set mode p 43 e Rear panel ANTENNA 1 2 p 13 DC POWER SUPPLY p 16 Example ANT1 for 1 8 18 MHz bands ANT for 21 50 MHz bands GROUND p 13 000000 000 0996 CO Use the heaviest gauge wire or strap available and make the connection as short as possible STRAIGHT KEY Grounding prevents electrical shocks TVI and other problems 14 2 INSTALLATION AND CONNECTIONS E Advanced connections e Front panel TWIN PBT sPLIT U8 _
41. memory channel 04 P1 0100 P2 0101 Memory to VFO Select LSB ao Select AM Scan stop Select CW Programmed memory scan start Select RTTY Programmed scan start Select FM AF scan start Select CW R Fine programmed scan start Select RTTY R Fine AF scan start Select VFO mode Memory scan start Exchange main and sub readouts Select memory scan start Equalize main and sub readouts Turn the dualwatch OFF Command table eee pinued Sub command command 01 Level data 02 Level data 03 Level data 06 Level data 07 Level data 08 Level data 09 Level data OA Level data OB Level data OC Level data OD Level data OE Level data OF Level data 10 Level data 12 Level data 15 Level data Set AF scan span A1 5 kHz A2 10 kHz A3 20 kHz A4 50 kHz A5 100 kHz A6 500 kHz A7 1 MHz Set as non select channel Set as select channel Set scan resume OFF Set scan resume ON am ter the split function OFF am ter the split function ON Select 10 Hz 1 Hz tuning step Select 100 tuning step Select 1 kHz tuning step Select 5 kHz tuning step Select 9 kHz tuning step Select 10 kHz tuning step Select 12 5 kHz tuning step Select 20 kHz tuning step Select 25 kHz tuning step Attenuator OFF Attenuator ON 6 dB Attenuator ON 12 dB Attenuator ON 18 dB Select read antenna selection OO ANT1 01 ANT2 Add 0 or 1 to turn RX ANT OFF or ON re spectively Announce with voice synt
42. min to 120 120 min in 5 min step Send read calibration marker O OFF 1 ON Send read confirmation beep O OFF 1 ON Send read band edge beep O OFF 1 ON Send read RF SQL control set 0 Auto 1 SQL 2 RF SQL Send read quick dualwatch set O OFF 1 ON Send read quick split set O OFF 1 ON Send read FM split offset HF 4 000 to 4 000 MHz see p 112 for details Send read FM split offset 50 MHz 4 000 to 4 000 MHz see p 112 for details Send read split lock set O OFF 1 ON Send read tuner auto start set O OFF 1 ON Send read PTT tune set O OFF 1 ON Send read antenna selection O OFF 1 Manual 2 Auto Send read RTTY mark frequency 0 1275 Hz 1 1615 Hz 2 2125 Hz Send read RTTY shift width 0 170 Hz 1 200 Hz 2 425 Hz Send read RTTY keying polarity 0 Normal 1 Reverse Send read RTTY decode USOS O OFF 1 ON Send read RTTY decode new line code O CR LF CR LF 1 CR LF Send read speech language 0 English 1 Japanese Send read speech speed 0 slow 1 fast Send read S level speech O OFF 1 ON Send read memo pad numbers 0 5 ch 1 10 ch Send read main dial auto TS O OFF 1 Low 2 High Send read mic up down speed 0 Low 1 High Send read Cl V transceive set O OFF 1 ON Send read CI V 731 mode set O OFF 1 ON Send read TX spectrum scope set O OFF 1 ON Send read spectrum scope max hold set O OFF 1 ON Send read voice auto monitor set O OFF 1
43. operating conditions E Grounding To prevent electrical shock television interference TVI broadcast interference BCI and other prob lems ground the transceiver through the GROUND 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 be tween the GND terminal and ground as short as pos sible G A WARNING NEVER connect the GND G terminal to a gas or electric pipe since the connec 77 tion could cause an explosion or electric shock SIMON I 000000 000 o og OO NILS INSTALLATION AND CONNECTIONS E Antenna connection For radio communications the antenna is of critical im portance along with output power and sensitivity Se lect antenna s such as a well matched 50 Q antenna and feedline 1 5 1 or better of Voltage Standing Wave Ratio VSWR is recommended for your desired band Of course the transmission line should be a coaxial cable When using 1 antenna use the ANT1 connector 7 CAUTION Protect your transceiver from lightning G 77 by using a lightning arrestor SN PL 259 CONNECTOR INSTALLATION EXAMPLE Slide the coupling ring down Strip the cable jacket and soft solder Coupling ring 10 mm soft solder 10MM soft Strip the cable as A H solder shown at left Soft sol Bile der the center con 1 2 mm ductor solder NG Slide the connector ee Til
44. or FM mode p 65 Enters the VOX set mode when pushed for 1 sec in a phone mode p 65 v What is the VOX function The VOX function voice operated transmission starts trans mission without pushing the transmit switch or PTT switch when you speak into the microphone then automatically re turns to receive when you stop speaking Selects semi break in full break in oper ation or turns the break in operation OFF when pushed in CW mode p 66 Y What is the break in function The break in function switches transmit and receive with CW keying Full break in QSK can monitor the receive signal during keying Turns the RTTY filter ON and OFF in RT TY mode p 45 When the RTTY filter is turned ON TWIN PBT functions as the IF shift control Enters the RTTY filter set mode when pushed for 1 sec in RT TY mode p 45 v What is the IF shift The IF shift function electronically changes the center of the IF Intermediate Frequency passband frequency to reject in terference Only the inner control of TWIN PBT can be used for the IF shift control Turns the speech compressor ON and OFF in SSB mode p 67 Switches the narrow middle or wide transmit filter when pushed for 1 sec v What is the speech compressor The speech compressor compresses the transmitter audio input to increase the average audio output level Therefore talk power is increased This function is effective for
45. settings 33 RECEIVE AND TRANSMIT 1 Push a band key to select the desired band 2 Push SSB to select LSB or USB LSB or USB appears Below 10 MHz LSB is automatically selected above 10 MHz USB is automatically selected 3 Rotate the tuning dial to tune a desired signal The S meter indicates received signal strength when signal is received 4 Rotate AF to set audio to a comfortable listening level Push TRANSMIT or PTT microphone to trans mit The TX indicator lights red 6 Speak into the microphone at your normal voice level e Adjust the microphone gain with MIC at this step if necessary 7 Push TRANSMIT or release PTT microphone to return to receive e Noise reduction p 64 Push NR switch to turn the noise reduction ON and OFF e Rotate NR control to adjust the noise reduction level e Noise reduction indicator in NR switch lights when the noise reduction is set to ON e Notch filter p 64 Push NOTCH switch to turn the auto or manual notch function ON and OFF Rotate NOTCH control to set the attenuating fre quency for manual notch operation e Notch indicator in NOTCH switch lights when either the auto or manual notch is set to ON e AGC auto gain control p 59 Push AGC switch several times to select AGC FAST AGC MID or AGC SLOW Push AGC for 1 sec to enter the AGC set mode Rotate tuning dial to adjust the time constant
46. 1 1 03 3 oldest e Channel code for memory keyer To send or read the desired memory keyer contents the channel and character codes as follows are used e Channel code Channel number 01 03 04 Character ASCII code Description 4 Symbol e g to send BT enter 4254 Inserts contact number can be used for 1 channel only AZ 20 gt F ME GJE BE 5 7 20 2F 3F C 2E 5E 2A 5A 7A e FM split frequency HF 50 MHz setting The following data sequence is used when sending reading the FM split frequency setting 5 D D x lt 3 T gt lt d ae ae 55 E DD x 55 gt 3 F S amp S FP EBs N T N N O N I x T I Bay Q S D i il Or r r b QOQ OO 112 Mm 1 SPECIFICATIONS e General e Frequency coverage Rx TX 0 030 60 000 MHz 1 800 1 999 MHz 3 500 3 999 MHz 7 000 7 300 MHz 10 100 10 150 MHz 14 000 14 350 MHz 18 068 18 168 MHz 21 000 21 450 MHz 24 890 24 990 MHz 28 000 29 700 MHz 50 000 54 000 MHz Some frequency bands are not guaranteed Depending on version e Mode e No of memory channels Antenna connector Temperature range Frequency stability e Frequency resolution e Power supply e Power consumption Transmit Max power Receive Standby Max audio e Dimensions projections not included e Weight approx e ACC 1 c
47. 3 Turn the transceiver upside down 4 Remove 6 screws from the bottom of the trans ceiver then lift up the bottom cover WE UT 102 VOICE SYNTHESIZER UNIT The UT 102 announces the accessed readout s fre quency mode etc S meter level can also be an nounced p 101 in a clear electronically generated voice in English or Japanese Push LOCK SPEECH for 1 sec to announce the frequency etc 1 Remove the top and bottom covers as shown above 2 Remove the protective paper attached to the bot tom of the UT 102 to expose the adhesive strip 3 Plug UT 102 into J3502 on the MAIN unit as shown in the diagram at right 4 Adjust the trimmer SPCH to set the speech level if desired Refer to inside views on p 108 Return the top and bottom covers to their original positions UT 102 J3502 104 105 1 4 MAINTENANCE E Troubleshooting The following chart is designed to help you correct If you are unable to locate the cause of a problem or problems which are not equipment malfunctions solve it through the use of this chart contact your near est Icom Dealer or Service Center _ PROBLEM POSSIBLE CAUSE SOLUTION REF Power does not come on Power cable is improperly connected Re connect the DC power cable correctly p 16 when the POWER switch Fuse is blown e Check for the cause then replace the fuse with p 106 is pushed the spare one Fuses are installed in the DC
48. 4 HF 50 MHz AUTO Y MATIC ANTENNA TUNER or AH 3 HF AUTOMATIC AN 4 TENNA TUNER connect it to the ANT1 connector Y The internal antenna tuner activates for ANT2 and h deactivates for ANT1 when connecting the AH 4 or 44 AH 3 E Microphone HM 36 UP DOWN SWITCHES UP DN PTT SWITCH Change the selected readout frequency or memory Push and hold to transmit release to receive channel e Continuous pushing changes the frequency or memory channel number continuously e While pushing XFC the transmit readout frequency can be controlled while in spilt frequency operation The UPJ DN switch can simulate a key paddle Preset in the keyer set mode p 43 e HM 36 SCHEMATIC DIAGRAM MICROPHONE MICROPHONE CABLE MICROPHONE PLUG MIC ELEMENT PTT RECEIVE TRANSMIT ms 2 13 E Unpacking After unpacking immediately report any damage to the delivering carrier or dealer Keep the shipping cartons For a description and a diagram of accessory equip ment included with the IC 756PROIII see Supplied accessories on p i of this manual E Selecting a location Select a location for the transceiver that allows ade quate air circulation free from extreme heat cold or vibrations and away from TV sets TV antenna ele ments radios and other electromagnetic sources The base of the transceiver has an adjustable stand for desktop use Set the stand to one of two angles de pending on your
49. 7 088 MHz LSB into memory channel 12 1 Set the desired frequency and operating mode in VFO mode 2 Push A W several times to select the desired da memory channel l q a p w 2 e Memory channel screen is convenient for selecting the desired channel e Memory channel contents appear in the memory chan nel readout below the frequency readout _ appears if the selected memory channel is a blank channel and does not have contents 3 Push MW for 1 sec to program the displayed fre quency and operating mode into the memory channel a ay Zi OI TD WFO FILZ METER u p i i Programming in memory mode EXAMPLE Programming 21 280 MHz USB into memory channel 18 1 Select the desired memory channel with A V in memory mode e Memory channel contents appear in the memory chan nel readout below the frequency readout _ 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 or memo pads etc 3 Push MW for 1 sec to program the displayed fre quency and operating mode into the memory channel 79 8 MEMORY OPERATION E Frequency transferring The frequency and operating mode in a memory chan nel can be transferred to the VFO e Transferring in VFO mode This is useful for transferring programmed co
50. 9 99 MHz 0 13 pV 50 0 54 0 MHz 13 pV 0 5 1 799 MHz 2 uV 1 80 29 99 MHz 1 UV 50 0 54 0 MHz 0 5 pV 28 0 29 99 MHz 0 32 uV 50 0 54 0 MHz Pre amp 1 is ON Pre amp 2 is ON e Squelch sensitivity Pre amp OFF SSB CW RTTY FM e Selectivity SSB RTTY BW 2 4 kHz CW BW 500 Hz AM BW 6 kHz FM BW 15 kHz e Spurious and image rejection ratio AF output power at 13 8 V DC e RIT variable range e PHONES connector External SP connector Antenna tuner Less than 5 6 pV Less than 1 yV More than 2 4 kHz 6 dB Less than 3 6 kHz 60 dB More than 500 Hz 6 dB Less than 700 Hz 60 dB More than 6 0 kHz 6 dB Less than 15 0 kHz 60 dB More than 12 0 kHz 6 dB Less than 20 0 kHz 60 dB More than 70 dB except IF through on 50 MHz band More than 2 0 W at 10 distortion with an 8 Q load 9 999 kHz 3 conductor 6 35 d mm 1 4 2 conductor 3 5 d mm 8 Q e Matching impedance range HF bands 50 MHz band e Minimum operating input power Tuning accuracy e Insertion loss after tuning 16 7 to 150 Q unbalanced Less than VSWR 3 1 20 to 125 Q unbalanced Less than VSWR 2 5 1 8 W VSWR 1 5 1 or less Less than 1 0 dB All stated specifications are typical and subject to change without no tice or obligation options 18 E IC PW1 HF 50 MHz ALL BAND 1 kW LINEAR AMPLIFIER PS 125 DC POWER SUPPLY Full duty 1 kW linear amplif
51. CW and RT TY modes See pgs 2 30 98 for details E AF scan operation Push EXIT SET several times to close a multi function screen if necessary 2 Select VFO mode or a memory channel 3 Select the desired operating mode The operating mode can also be changed while scan ning 4 Push F 5 SCAN to select the scan screen dF SPan Programmed Pi scan edges PZ Set RF SQL open or closed e See previous page for scan condition If the RF SQL control function is set as AUTO the squelch is always open in SSB CW and RT TY modes See pgs 3 69 for details Set the AF span by pushing F 4 AF SPAN e45 kHz 10 kHz 20 kHz 50 kHz 100 kHz 500 kHz and 1000 kHz are selectable 7 Set center frequency of the AF span 6 Push F 1 PROG to start the programmed scan e Decimal points blink while scanning 12 00 1 gt dk a I TD UFO FILZ qrx4 Oo t D p 1 14 168 GA LNB WFO USB FILZ qr wp t gt T PROGRAM SCAN I p N dF SPan Programmed Pil scan edges Pie 7 When the scan detects a signal the scan stops pauses or ignores it depending on the resume set ting and the squelch condition To cancel the scan push F 1 PROG 7 If the same frequencies are programmed into the 77 scan edge memory channel P1 and P2 pro 4 grammed scan does not start Push F 2 AF to start the AF scan e Decimal points blink while scanning 24k a I TD UFO FI
52. Communi cations Interface V CI V controls the following func tions of the transceiver 5 3 personal Up to 4 Icom CI V transceivers or transceivers can be computer connected to a personal computer equipped with an RS 232C port See p 103 for setting the Cl V condi tion using set mode e Data format mini plug cable The CI V system can be operated using the following data formats Data formats differ according to com mand numbers A data area or sub command is added for some commands Controller to IC 756PROIII OK message to controller D T OR gt 5 Ql a gt oa DO oO oO v8 4 8 22 S FE D p2 98 8k amp oD po 2 Se ce gee Se Oo lt L Ge we Be ox 22 09 ef DE DLO ox ox 29 33 6 og ES De OG vE gg v s EE BSR OG DE Go ge Be SE EE Do 8 Ev Oo Se Ga O ED DD c5 5 amp 6 E 0O02 50 DD C5 cs 39 rate ao cu OG Eg EO Ore OG SH OG O r gt of 96 O2 i o o OL an Og 22 ms Ze v NM D IC 756PROIII to controller NG message to controller Command table 07 C1 Turn the dualwatch ON DO D1 01 Same as Send mode data Select main readout command 06 Select sub readout 02 Read band edge frequencies Select memory mode Moe JE Read operating frequency 0001 0101 Select
53. D Low 300 Hz High 2700 Hz Send read SSB transmit band width NAR Low 500 Hz High 2500 Hz Send read clock2 function O OFF 1 ON Send read offset time for clock2 240001 24 00 240000 24 00 Send read screen saver setting O OFF 1 15 min 2 30 min 3 60 min Send read RTTY TX USOS O OFF 1 ON Send read DATA mode 0 0OFF 1 ON Send read SSB transmit band width 0 Wide 1 Middle 2 Nar row Set repeater tone frequency Set tone squelch tone frequency Set the transceiver to receive or transmit condition 0 Rx 1 Tx Send read tuner function O OFF 1 ON 2 Manual tune e To send read memory contents When sending or reading memory contents additional code as follows must be added to appoint the memory channel Additional code 0000 0101 0100 P1 0101 P2 e Band stacking register To send or read the desired band stacking register s con tents combined code of the frequency band and register codes as follows are used For example when sending reading the oldest contents in the 21 MHz band the code 0703 is used Frequency band code Frequency band Frequency range unit MHz 1 800000 1 999999 3 400000 4 099999 7 6 900000 7 499999 9 900000 10 499999 13 900000 14 499999 17 900000 18 499999 20 900000 21 499999 24 400000 25 099999 28 000000 29 999999 50 000000 54 000000 Other than above CONTROL COMMAND 16 e Register code Code Registered number 0
54. Example 14 MHz band 1 910000 MHz CW 3 560000 MHz LSB 7 060000 MHz LSB 10 130000 MHz CW 14 200000 MHz USB 18 130000 MHz USB 21 300000 MHz USB 24 980000 MHz USB 29 500000 MHz USB 50 200000 MHz USB 15 100000 MHz USB 1 915000 MHz CW 3 580000 MHz LSB 7 020000 MHz CW 10 140000 MHz CW 14 050000 MHz CW 18 150000 MHz USB 21 050000 MHz CW 24 900000 MHz CW 28 100000 MHz CW 51 000000 MHz FM 15 200000 MHz USB 1 Push 14 5 then select a frequency and an oper ating mode e Frequency and operating mode are memorized in the first band stacking register Q Push 14 5 again then select another frequency and operating mode e This frequency and operating mode are memorized in the second band stacking register 3 Push 14 5 again then select another frequency and operating mode This frequency and operating mode are memorized in the third band stacking register When a fourth frequency and operating mode are se lected on a band the first register set in step is over written 24 25 3 BASIC OPERATION E Frequency setting The transceiver has several tuning methods for conve nient frequency tuning Tuning with the tuning dial Band keys gt Tuning dial Direct frequency entry with the keypad The t
55. FIER does not comply with Euro bination with the DC power supply complies with European pean Harmonised Standard regulations Please do not use Harmonised Standard regulations under the conditions this equipment within European countries listed below Conditions In combination with PS 125 114 Count on us A 6378H 1EX Printed in Japan Icom Inc 2004 Icom Inc 1 1 32 Kamiminami Hirano ku Osaka 547 0003 Japan
56. FINE PROGRAM SCAN or FINE AF SCAN ap pears WFO USB qr wpet 1 Teh L R Be d FINE PROGRAM SCAN ST I N AF SPan 18kHz Programmed F1 566 66MHz scan edges P2 279 999 99NHz 6 When the scan detects a signal the scan speed decreases but does not stop T Push F 1 PROG or F 2 AF to stop the scan push F 3 FINE to cancel the fine scan Push F 1 MEMO to start the memory scan e Decimal points blink while scanning Zak TIiz lt Ph bam q rsx4q o t sp p WFO USB N d Z MEMORY SCAN TI x AF SPan 16kHz Programmed F1 986 B MHzZz scan e edges PE 999 99MHz 6 When the scan detects a signal the scan stops pauses or ignores it depending on the resume set ting and the squelch condition T To cancel the scan push F 1 MEMO 7 2 or more memory channels must be programmed 7 for memory scan to start 84 O SCANS E Select memory scan operation G Push EXIT SET several times to close a multi function screen if necessary 2 Select memory mode 3 Push F 5 SCAN to select the scan screen dF SPan Programmed Pi scan edges PZ Set RF SQL open or closed e See p 82 for scan condition If the RF SQL control function is set as AUTO the squelch is always open in SSB CW and RT TY modes See pgs 2 30 98 for details 5 Push F 1 MEMO to start the memory scan e Decimal points blink while
57. IPTION ssnnnnnnnnnnnnnnnnnnnnnnnnnnnne 1 12 __ Pe 2 04 OANE EEE 1 ME LCD display rrerrnnnerrnnnrrvrnnnevrnnnennnnnrenvnsnennnen 9 E Screen menu arrangement rrrrrerrnnnvrennrnvnn 10 ME Rear panel rrrnnrnnnnonnnennnnvnnnnvnnennnnnnnnnnnnnnnnen 11 E Microphone HM 36 rrrrnnnnnnnnrvnnnennnnennnnnnn 12 2 INSTALLATION AND CONNECTIONS 13 20 ME Unpacking ernrrvnnnnvnnnrevnnrennerennnnennnnennnnrsnnnenn 13 E Selecting a location rrrnrrrrnrnnnnrvrrrnnnrvnnnnnnrr 13 HEI e10 ao Lao EE 13 E Antenna connection rrnrernnrvnnrevanevnnnnnnnnnnnen 13 E Required connections rrrnnrrrnnrrrnnnrrvnnrennnnn 14 E Advanced connections cccccseeeeeeeeeeeeeees 15 M Power supply connections rrrrarernrnnnrevanrn 16 E Linear amplifier connections rrnrrrnnnrrnnnrr 17 E External antenna tuner COMNECIONS ur 18 Mi Transverter jack information rrrnrrrrnnnnrnnnn 18 E Microphone connector information 18 E FSK and AFSK SSTV CONIMCCUONS se 19 WE Accessory connector information 20 3 BASIC OPERATION nnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn 21 32 E When first applying power CPU resetting sissende 21 MM Initial settings rrrnnnnernnrvnnnrernnrennnrennnnennnnennn 21 ME VFO description rarrrrnnrrnnnrnrnnnennnnrnnnnennnnnnnn 22 E Selecting VFO memory mode 0 00008 23 E Main Sub band selection ccccc
58. IPTION E Front panel continued Lai C 7 tJ PROM a 0 00 ge CW RTTY mm ar vvvvv vv v ovvvvv u20 0 rm5 s as vBm r s 3rassmmmmmmrre amp TRANSMIT INDICATOR TX Lights red while transmitting amp RECEIVE INDICATOR RX Lights green while receiving a signal and when the squelch is open LOCK INDICATOR LOCK p 64 Lights red when the dial lock function is activated TRANSMIT FREQUENCY CHECK SWITCH XFC Monitors the transmit frequency when pushed and held during the split frequency operation e While pushing this switch the transmit frequency can be changed with the tuning dial keypad memo pad or the A V switches e When the split lock function is turned ON pushing XFC cancels the dial lock function p 99 QUICK TUNING SWITCH TS p 26 Turns the quick tuning step ON and OFF While the quick tuning indicator VW is displayed above the frequency indication the frequency can be changed in programmed kHz steps 0 1 1 5 9 10 12 5 20 and 25 kHz quick tuning steps are available for each operating mode indepen dently Quick tuning indicator 12 00 a Z FILE a S ai Hooe A _ She m oi oi ETE Ces Ce ET ExitseT JED EI ED I HE mes EA e PITCH When the quick tuning step is OFF push for 1 sec to turn the 1 Hz tu
59. IT E Quick split function When you find a DX station an important considera tion is how to set the split frequency When you push the SPLIT switch for 1 sec split fre quency operation is turned ON the sub readout is equalized to the main readout frequency and enters standby for transmit frequency input This shortens the time needed to start split frequency operation The quick split function is ON by default For your convenience it can be turned OFF in set mode p 98 In this case the SPLIT switch does not equalize the main and sub readout frequencies 1 Suppose you are operating at 21 290 MHz USB in VFO mode WFO USB PRACTICAL EXAMPLE When you are searching for DX stations and you suspect that a DX station may say up X kHz for their receive frequency OPERATION 1 1 Push SPLIT for 1 sec to standby for split opera tion 2 If the DX station s operator says up 10 kHz Push 1 0 then SPLIT Or rotate the tuning dial OPERATION 2 If the DX station s operator says down 5 kHz be fore you enter standby for split operation gt Push F INP 5 then SPLIT The split function is turned ON and 5 kHz down fre quency is entered in the sub readout 2 Push SPLIT for 1 sec e Split frequency operation is turned ON The sub readout is equalized to the main readout fre quency The sub readout enters standby for transmit frequency input
60. LIT Offsetc lt HF 1686MHz FM SPLIT Offsett S M gt S MHz SPLIT LOCK OFF Tuner Auto Start OFF Tuner PTT Start OFF CANT Switch Auto RTTY Mark Frequency When OFF is selected the ANT switch does not function and ANT1 is always selected When Manual is selected the ANT switch functions however band memory does not function In this case you must select an antenna manually When Auto is selected default setting the antenna tuner ON OFF condition is also memorized in the band memory When Auto or Manual is selected the antenna tuner ON OFF condition is consistent with the ANT switch e Antenna switch selection example Under the following condition Auto should be se lected as the ANT switch set mode item When you use 2 antennas Under the following conditions Manual should be selected as the ANT switch set mode item When using 1 antenna When using an external antenna selector for more than 3 antennas except for receive antenna When using an external antenna tuner E Antenna tuner operation The internal automatic antenna tuner matches the transceiver to the connected antenna automatically Once the tuner matches an antenna the variable ca pacitor angles are memorized as a preset point for each frequency range 100 kHz steps Therefore when you change the frequency range the variable Capacitors are automatically pr
61. LZ qrs4q ot sp p WFO USE AF Center AF SPan Programmed Pi scan e dges PE 9 When the scan detects a signal the scan stops pauses or ignores it depending on the resume set ting and the squelch condition To cancel the scan push F 2 AF SCANS 9 E Fine programmed scan fine AF scan Fine scan functions as programmed or AF scan but scan speed decreases when the squelch opens but does not stop The scanning tuning step shifts from 50 Hz to 10 Hz while the squelch opens G Push EXIT SET several times to close a multi function screen if necessary 2 Push F 5 SCAN to select the scan screen 3 Set for programmed scan or AF scan as described on previous page 4 Push F 1 PROG or F 2 AF to start a scan e Decimal points blink while scanning ek a N 12 00 TD VFO FILZ q r got p p 1 id LEE DE LGE WFO USE gt z T PROGRAM SCAN I s dF SPan Programmed Pils scan edges PZ E Memory scan operation Push EXIT SET several times to close a multi function screen if necessary 2 Select memory mode 3 Push F 5 SCAN to select the scan screen a I 12 00 WFO USB Programmed Pils Scan edges Poe Set RF SQL open or closed See p 82 for scan condition If the RF SQL control function is set as AUTO the squelch is always open in SSB CW and RT TY modes See pgs 2 30 98 for details 5 Push F 3 FINE to start a fine scan
62. O o 010 1 INSTRUCTION MANUAL HF 50 MHz ALL MODE TRANSCEIVER IC 756PROM Icom Inc IMPORTANT READ THIS INSTRUCTION MANUAL CAREFULLY before attempting to operate the transceiver SAVE THIS INSTRUCTION MANUAL This manual contains important safety and operating in structions for the IC 756PROIII FOREWORD We understand that you have a choice of many differ ent radios in the market place We would like to take a couple of moments of your time to thank you for mak ing your IC 756PROIII your radio of choice and hope you agree with Icom s philosophy of technology first Many hours of research and development went into the design of your IC 756PROIII SUPPLIED ACCESSORIES The transceiver comes with the following accessories 1 DC power cable OPC 025D 2 Hand microphone HM 36 3 Spare fuses FGB 30 A 4 Spare fuse FGB 5 A CW keyer plug AP 330 EXPLICIT DEFINITIONS wor DEFINITION Personal injury fire hazard or electric A WARNING shock may occur CAUTION Equipment damage may occur If disregarded inconvenience only No risk or personal injury fire or electric shock FEATURES O Ultimate receiver performance 30 dBm of IP3 characteristics HF bands only O Built in Baudot RT TY demodulator O Up graded real time spectrum scope and mini scope indications D JA LUO Icom Icom Inc and the com are registered trademarks of Icom Incorpora
63. ON Send read cut number style 0 Normal 1 190 ANO 2 190 ANT 3 90 NO 4 90 NT Send read count up trigger chan nel 1 M1 2 M2 3 M3 4 M4 Send read present number 1 9999 Send read CW keyer repeat time 1 1 sec to 60 60 sec Send read CW keyer dot dash ratio 28 1 1 2 8 to 45 1 1 4 5 Send read rise time 0 2 msec 1 4 msec 2 6 msec 3 8 msec Send read paddle polarity 0 Normal 1 Reverse Send read keyer type 0 Straight 1 Bug key 2 ELEC Key Send read mic up down keyer set O OFF 1 ON Send read scan speed 0 low 1 high Send read scan resume O OFF 1 ON Send read VOX gain 0 0 to 255 100 Send read anti VOX gain 0 0 to 255 100 Send read VOX delay 0 0 0 sec to 20 2 0 sec Send read RTTY filter bandwidth 0 250 Hz 1 300 Hz 2 350 Hz 3 500 Hz 4 1 kHz Send read twin peak filter 0 OFF 1 ON Send read timer functions O OFF 1 ON Send read DSP filter type O SSB sharp CW sharp 1 SSB sharp CW soft 2 SSB soft CW sharp 3 SSB soft CW soft Send read quick RIT ATX clear function O OFF 1 ON Send read SSB CW synchronous tuning function O OFF 1 ON Send read CW normal side set O LSB 1 USB Command table continued Send read external keypad type O OFF 1 Keyer send 2 Voice play Tx 3 Auto Send read NB level 0 0 to 255 100 Send read SSB transmit band width WIDE Low 100 Hz High 2900 Hz Send read SSB transmit band width MI
64. Po meter 3 Push CW RTTY once or twice to select RTTY mode 4 Push TRANSMIT 5 Rotate RF POWER clockwise past the 12 o clock position for more than 30 W output power 30 6 Push METER once to select the SWR meter as the transmit meter 7 Read the SWR on the SWR meter In addition the transceiver can display the multi func tion digital meter in the LCD display which displays all transmit meters simultaneously e Multi function digital meter Push METER for 1 sec to turn the multi function digital meter ON 2 Push F 1 P HOLD to toggle the peak level hold function ON or OFF P HOLD appears on the window title when the peak level hold function is turned ON 3 Push METER for 1 sec or push EXIT SET to turn the multi function digital meter OFF SWR meter Y The built in antenna tuner matches the transmitter ZY to the antenna when the SWR is lower than 3 1 E Basic transmit operation Before transmitting monitor your selected oper ating frequency to make sure transmitting won t cause interference to other stations on the same frequency It s good Amateur practice to listen first and then even if nothing is heard ask is the frequency in use once or twice before you being operating on that frequency Transmitting Before transmitting monitor your selected operating frequency to make sure transmitting won t cause in terference to other stations on the same freq
65. SMIT Keyer set mode continued i ime Rise time This item sets the envelop time period which the out put power becomes the set transmit power About rise time T Key action Rx Tx output power 1 1 Set Tx power level Rise time Polarity Paddle polarity This item sets the paddle polarity This item selects the keyer type for ELEC KEY con nector on the front panel Microphone s UP DN switches keyer This item allows you to set the microphone UP DN switches to be used as a paddle 2 4 6 or 8 msec can be selected default 4 msec e Normal and reverse pooarity can be selected ELEC KEY BUG KEY and Straight key can be se lected default ELEC KEY ON UP DN switches can be used for CW OFF UP DN switches cannot be used for CW NOTE When ON is selected the frequency and memory channel cnanot be changed using the UP DN switches E Operating RTTY FSK TRANSMIT TX indicator RX indicator Band keys tE NMOOOUOON CW RTTY Tuning dial Convenient functions for receive e Preamp p 57 Push P AMP several times to set the preamp OFF preamp 1 ON or preamp 2 ON P AMP1 or PAAMP2 appears when the preamp 1 or preamp 2 is set to ON respectively depend
66. SQLS Squelch output SQL open Less than 0 3 V 5 mA Goes to ground when squelch opens SQL closed More than 6 0 V 100 LA l Output current Max 1 A TAON ee OUD Winen POWETIS ON le onneciedin parallel wih Cee ony Control voltage 4 Vto 0 V ALC ALC voltage input Input impedance More than 10 kQ Connected in parallel with ACC 2 pin 5 ACC 2 PIN No NAME DESCRIPTION SPECIFICATIONS Output voltage 8 V 0 3 V 1 fev ARUGA OMD Output current Less than 10 mA cat Same as ACC 1 pin 2 R 6 3 SEND Same as ACC 1 pin 3 E legen a OY Em ee mer Rear panel view FIC Activates XVERT input output Input iver More than 10 kQ when HIGH voltage is applied Input voltage 2 to 13 8 V If the CW side tone level limit or beep level limit is in 77 use the CW side tone or beep tone decreases from Y the fixed level when the AF control is rotated above 7 a specified level respectively p 94 SSN 20 HE 3 BASIC OPERATIONS E When first applying power CPU resetting Before first applying power make sure all connections required for your system are complete by referring to Section 2 Then reset the transceiver using the follow POWER F INP M CL ing procedure 7 Resetting CLEARS all programmed contents in 7 memory channels and returns programmed values 7 in set mode to default values MO 00000000
67. T should normally be set to the center posi tions PBT setting is cleared when there is no interfer ence When PBT is used the audio tone may be changed e Not available for FM mode e While rotating TWIN PBT noise may occur This comes from the DSP unit and does not indicate an equipment malfunction SSS Cutting both higher and lower passbands TWIN PBT Interference Interference Desired signal 60 61 5 FUNCTION FOR RECEIVE E IF filter selection The transceiver has 3 passband width IF filters for each mode For SSB and CW modes the passband width can be set within 50 to 3600 Hz in 50 or 100 Hz steps A total of 41 passband widths are available For RTTY mode the passband width can be set within 50 to 2700 Hz in 50 or 100 Hz steps A total of 32 passband widths are available For AM and FM modes the passband width is fixed and 3 passband widths are available The filter selection is automatically memorized in Geach mode 7 The PBT shift frequencies are automatically mem 77 orized in each filter IF filter selection 1 Select the desired mode Q For RTTY mode turn OFF the RTTY filter by push ing RTTY FIL 3 Push FILTER several times to select the IF filter 1 20r3 The selected passband width and filter number is dis played in the LCD Passband Selected width IF filter e Filter passband width setting SSB CW and RTTY mode only 1 Select SSB C
68. TION 1 E Screen menu arrangement The following screens can be selected from the start Pushing EXIT SET several times returns to the start up screen Choose the desired screen using the fol up screen See p 92 for set mode arrangement lowing chart e Start up screen T DAN 12 00 QD Ura FILS 7 227 WFO USB qr 9 Pp Pp Pb e Spectrum scope screen p 55 e Voice recorder screen p 72 e Memory keyer screen CW mode p 40 e Programmed scan screen VFO mode p 83 ode p 46 e Memory scan screen Memory mode p 84 10 1 PANEL DESCRIPTION E Rear panel OC 0 YY 000000 000 NAL TRANSVERTER JACK XVERT p 18 External transverter input output jack Activated by voltage applied to ACC 2 pin 6 RECEIVE ANTENNA CONNECTOR RX ANT p 15 Connects a 50 Q general coverage antenna with an RCA connector TUNER CONTROL SOCKET TUNER p 15 Accepts the control cable from an optional AH 4 HF 50 MHz AUTOMATIC ANTENNA TUNER or AH 3 HF AUTOMATIC ANTENNA TUNER ACCESSORY SOCKET 1 ACC 1 ACCESSORY SOCKET 2 ACC 2 Enable connection of external equipment such as a linear amplifier an automatic antenna selector tuner TNC for data communications etc e See p 20 for socket i
69. TIONS E Digital voice recorder continued e Sending a message for transmit G Push EXIT SET several times to close a multi function screen if necessary 2 Select a phone mode by pushing SSB or AM FM 3 Push F 2 VOICE to call up the voice recorder screen If the receive voice memory channel R1i R4 appears push F 5 T R to select transmit voice memory chan nel UQICE RECORDER ca JASYUA 4 Push the desired memory channel switch F 1 T1 F 4 T4 momentarily to transmit the contents EN os T2 T3 T4 Push the selected memory channel switch F 1 T1 F 4 T4 again to stop if desired 6 Push EXIT SET twice to exit the voice memory screen 7 For your information 7 When an external keypad is connected to the pin 3 Zand pin 7 of the MIC connecter the recorded Y message T1 T4 can be transmitted without open G ing the voice recorder set screen 7 See page 73 for details e Transmit monitor function The monitor function can be automatically turned ON while transmitting a voice memory message 1 Call up the voice recorder screen as described at left 2 Push EXIT SET then F 5 SET to select the voice recorder set screen 3 Rotate the tuning dial to turn the monitor function ON and OFF e Push F 3 DEF for 1 sec to select the default condi tion 4 Push EXIT SET to return to the voice recorder screen e Transmit level setting 1 Call up the
70. VOX ON appears while the VOX is in use 08822800 GI mj Adjusting the VOX function 1 Select a phone mode SSB AM FM 2 Push VOX to turn VOX function ON o d doo 3 Push VOX for 1 sec to enter VOX set mode 4 Select the VOX gain item using F 1 A or F 2 VI 5 While speaking into the microphone rotate the tuning dial to the point where the transceiver is continuously transmitting 6 Adjust the VOX delay for a convenient interval be fore returning to receive Select the VOX delay item using F 1 A or F 2 Rotate the tuning dial If the receive audio from the speaker switches to transmit adjust the anti VOX to the point where it has no effect 0ee8e080 GI GO 65 FUNCTION FOR TRANSMIT 6 E Break in function The break in function is used in CW mode to automat ically toggle the transceiver between transmit and re ceive when keying The IC 756PROIII is capable for full break in or semi break in Semi break in operation During semi break in operation the transceiver se lects transmit when keying then automatically returns to receive after a pre set time fro
71. W RTTY to select CW mode Push F 3 KEYER then EXIT SET to select keyer set mode 4 Push F 3 001 to select contest number set mode 5 Push F 1 4 or F 2 to select the desired set item oe e Push F 3 DEF for 1 sec to select the default condi Humber Style tion or value Count UP Trieser 6 Push EXIT SET twice to exit the keyer set mode Present Number Number style This item sets the mme system used for contest Normal Does not use morse cut number serial numbers normal or morse cut numbers default 190ANO Sets 1 as A 9 as N and 0 as O 190 ANT Sets 1 as A 9 as N and 0 as T 90 gt NT Sets 9 as N and 0 as O 90 NT Sets 9asNand0asT Count up trigger This me which of the three memory slots will have M1 M2 M3 and M4 can be set default M2 the contest serial number exchange The count up trigger allows the serial number automatically incre mented after each complete serial number exchange is sent ya y Present number This item shows the current number for the count up e Rotate the tuning dial to change the number or push trigger channel set above F 3 001CLR for 1sec to reset the current number to 001 Q Keyer set mode This set mode is used to set the CW side tone mem ory keyer repeat time dash weight paddle specifica tions keyer type et
72. W or RTTY mode e Passband widths for AM and FM modes are fixed and cannot be set Q For RTTY mode turn OFF the RTTY filter by push ing RTTY FIL 3 Push FILTER for 1 sec to enter filter set mode Passband Selected width IF filter atk f N TD WFO FILZ q 1 r a i o E P p WFO USB Push FILTER several times to select the desired IF filter While pushing F 1 BW rotate the tuning dial to set the desired passband width In SSB and CW modes the passband width can be set within the following range 50 to 500 Hz 50 Hz steps 600 to 3600 Hz 100 Hz steps In RTTY mode the passband width can be set within the following range 50 to 500 Hz 50 Hz steps 600 to 2700 Hz 100 Hz steps e Push F 3 DEF to select the default value 6 Repeat steps to if desired 7 Push EXIT SET to exit the filter set mode screen 7 The PBT shift frequencies are cleared when the f passband width is changed Y This filter set mode screen graphically displays the f PBT shift frequencies and CW pitch operations E DSP filter shape The type of DSP filter shape for each SSB and CW can be selected independently from soft and sharp 1 Push the EXIT SET several times to close a multi function screen if necessary 2 Push the EXIT SET switch for 1 sec to enter set mode 3 Push the F 3 DSP switch to enter the DSP filter set mode 4 Push one of F2 SSB FIL or F4 CW FIL to se lect the desired DSP
73. _ HEADPHONES T HANG 24 ET PBT CLR NOTCH EI EI O C PENTI xen EI 5 RX COMP dB ALC 0 ICOM IC 756PROII TUNER MONITOR NB NR The AFSK modulation signal can be input from MIC p 19 e Rear panel ANTENNA 1 2 pgs 17 18 REMOTE p 109 Connects a linear amplifier Used for computer control and transceive operation antenna selector etc RX ANTENNA TRANSVERTER p 18 Connects a transverter for V UHF band use ACC SOCKETS pgs 19 20 SEND ALC p 17 AH 4 AH 3 Used for connecting a EXTERNAL SPEAKER p 114 non Icom linear ampli fier 19 INSTALLATION AND CONNECTIONS 2 E Power supply connections CAUTION Before connecting the DC power cable check the following important items Make Use the optional PS 125 DC power supply with a 25A l i sure capacity when operating the transceiver with AC The POWER switch is OFF power Refer to the diagrams below e Output voltage of the power source is 12 15 V when you use a non Icom power supply e DC power cable polarity is correct Red positive terminal Black negative O terminal CONNECTING PS 125 DC POWER SUPPLY Transceiver
74. a and the shifting frequency appear when the function is ON Appear Q Rotate the RIT ATX control RIT ATX Low shift High shift 3 To reset the RIT frequency push CLEAR for 1 sec e Push CLEAR momentarily to reset the RIT frequency when the quick RIT ATX clear function is ON p 102 Reset to 4 To cancel the RIT function push RIT again ae disappears e Practical example When you find a DX station on 21 025 MHz CW and the station is picking up stations transmitting slightly up from 21 025 MHZ G Push RIT and ATX to turn both the RIT and ATX functions ON 2 Rotate RIT ATX to find the DX station s receive frequency 3 When you find the DX station s receive frequency push RIT to turn the RIT function OFF e Now you can transmit the DX station s receive fre quency and receive the DX station s transmit fre quency 21 025 MHz 4 Start transmitting while the station is standing by 58 59 D FUNCTION FOR RECEIVE E AGC function The AGC auto gain control controls receiver gain to produce a constant audio output level even when the received signal strength is varied by fading etc The transceiver has 3 AGC characteristics time con stant fast mid slow for non FM mode 7 The FM mode AGC time constant is fixed as Y FAST 0 1 sec and AGC time constant cannot be 7 selected e AGC time constant selection 1 Select non FM mode 2
75. ain the current time See p 108 for battery location CR2032 106 107 14 MAINTENANCE E Tuning dial brake adjustment The tension of the tuning dial may be adjusted to suit your preference The brake adjustment screw is located on the right side of the tuning dial See the figure at right Turn the brake adjustment screw clockwise or coun terclockwise to obtain a comfortable tension level while turning the dial continuously and evenly in one direction E Frequency calibration approximate A very accurate frequency counter is required to cali brate the frequency of the transceiver However a rough check may be performed by receiving radio station WWV or other standard frequency signals 7 CAUTION Your transceiver has been thor oughly adjusted and checked at the factory before being shipped You should not calibrate frequen 77 cles except for special reasons 1 Push SSB to select USB mode 2 Push PBT CLR for 1 sec to clear the PBT set tings and make sure that the RIT ATX function is not activated 3 Set the frequency to the standard frequency sta tion minus 1 kHz e When receiving WWV 10 000 00 MHz as a standard frequency set the operating frequency for 9 999 00 MHz Other standard frequencies can also be used 4 Push EXIT SET several times to close a multi function screen if necessary 5 Push EXIT SET for 1 sec to select the set mode screen 6 Push
76. alwatch BASIC OPERATION 3 E Selecting an operating band The triple band stacking register provides 3 memories in one band 3 sets of a frequency and operating mode on each band are automatically stored when used IG ea 8 0 Dem ax wO Band keys If a band key is pushed once the frequency and oper ating mode last used are called up When the key is pushed again another stored frequency and operating mode are called up OOOOOTD a CJC This function is convenient when you operate 3 oper ating modes on one band For example one register is used for a CW frequency another for an SSB fre quency and the other one for an RT TY frequency See the table below for a list of the band available and the default settings for each band REGISTER 2 REGISTER 3 REGISTER 1 BAND 1 8 MHz 3 5 MHz 7 MHz 10 MHz 14 MHz 18 MHz 21 MHz 24 MHz 28 MHz 50 MHz General 1 900000 MHz CW 3 550000 MHz LSB 7 050000 MHz LSB 10 120000 MHz CW 14 100000 MHz USB 18 100000 MHz USB 21 200000 MHz USB 24 950000 MHz USB 28 500000 MHz USB 50 100000 MHz USB 15 000000 MHz USB Using the band stacking registers
77. anning speed and scan resume condition e Scan speed The transceiver has 2 speeds for scanning high and low 1 Push EXIT SET several times to close a multi function screen if necessary 2 Push F 5 SCAN to select the scan screen AF SPan Programmed Pls Scan edges PZ 3 Push F 5 SET to select the scan set mode screen 4 Push F 1 4 to select the scan speed item SCAM SET SCAN SPeed HIGH SCAN Resume 5 Rotate the tuning dial to select the scan speed e Push F 3 DEF to select the default condition 6 Push EXIT SET to exit the scan set mode E Tone scan The transceiver can detect the subaudible tone fre quency in a received signal By monitoring a signal that is being transmitted on a repeater input fre quency you can determine the tone frequency re quired to access the repeater 1 Set the desired frequency or memory channel to be checked for a tone frequency 2 Push AM FM several times to select FM mode 3 Push TONE for 1 sec to enter the tone frequency screen 4 Push F 1 A or F 2 W to check the repeater tone frequency or tone squelch frequency respec tively pgs 52 53 SCANS 9 e Scan resume condition This item sets the scan resume function ON or OFF ON scan resumes 10 sec after stopping on a signal or 1 sec after a signal disappears OFF scan does not resume after stopping on a signal 1 Push EXIT SET several times to close a multi functio
78. ator Gay Push RIT e Manual notch indicator Gy Push NOTCH e ATX indicator i Push ATX e Split indicator aJi Push SPLIT 21 E VFO description VFO is an abbreviation of Variable Frequency Oscilla tor and traditionally refers to an oscillator The transceiver s VFO is somewhat different The VFO of the IC 756PROIII acts like a computer s window and can show one frequency and one operating mode You can call up a desired frequency to the VFO with the keypad memo pad read switch see p 81 or the memory transfer function see p 79 You can also change the frequency with the tuning dial and select the operating mode with the mode switches During dualwatch or split frequency operation the sub VFO is functional non outline non spotted larger fre quency characters While pushing XFC during split frequency operation you can change the transmit readout frequency with the keypad memo pad read switch or the memory transfer function BASIC OPERATION 3 MODE SWITCHES Te FILS TUNING DIAL KEYPAD BAND KEY 21 295 MHz MEMORY CHANNEL 7 001 MHz MEMO PAD 28 025 MHz e Differences between VFO mode and memory mode VFO MODE VFO shows a frequency and operating mode If the frequency or operating mode is changed the VFO automatically memorizes the new frequency or new operating mode When a VFO is selected from another band or mem ory mode the f
79. ay when auto notch is in use MN appears on the display when manual notch is in use The NOTCH indicator in this switch lights green when the function is activated NOTCH NOTCH CS Notch OFF C Notch ON V What is the notch function The notch function eliminates unwanted CW or AM carrier tones while preserving the desired signal s audio response The filtering frequency is adjusted to effectively eliminate un wanted tones via the DSP circuit amp PBT CLEAR SWITCH PBT CLR p 60 Clears the PBT settings when pushed for 1 sec The PBT CLR indicator in this switch lights green when PBT is in use PASSBAND TUNING CONTROLS TWIN PBT Adjust the receiver s passband width of the DSP filter p 60 e Passband width and shift frequency are displayed in the LCD e Push PBT CLR for 1 sec to clear the settings when not in use e Variable range is set to half of the IF filter passband width 25 Hz steps and 50 Hz steps are available e These controls function as an IF shift control while in AM mode and when the RTTY filter is turned ON Only the inner control may function in this case v What is the PBT control General PBT function electronically narrows the IF passband width to reject interference This transceiver uses the DSP circuit for the PBT function TWIN PBT N PBT1 A PBT2 TWIN PBT D TWIN PBT TWIN PBT 2 High cut Low cut Center 1 PANEL DESCR
80. c F 3 DEL 288 O080 Dot Dash Ratio 1 1 3 06 Rise Time ms Paddle Polarity Hormal Keser TyPe ELEC KEY MIC UP Down Keser Keyer repeat time When sending CW using the repeat timer this item sets the time between transmission Riess f lat i Dot Dash ratio This item sets the dot dash ratio Keying weight example Morse code K DOT Fixed Weight setting DASH DASH 1 1 3 default sad AL a Weight setting Adjusted Adjustable range SPACE Fixed SPAGE and DOT length can be adjusted with KEY SPEED only RECEIVE AND TRANSMIT 4 e Setting the electronic keyer 1 Push EXIT SET several times if necessary 2 Push CW RTTY to select CW mode Push F 3 KEYER then EXIT SET to select keyer set mode 4 Push F 4 CW KEY to select memory keyer set mode 5 Push F 1 4 or F 2 V to select the desired set item 6 Set the desired condition using the tuning dial Push F 3 DEF for 1 sec to select a default condition or value 7 Push EXIT SET twice to normal screen 1 to 60 sec in 1 sec steps can be selected default 2 sec 1 1 2 8 to 1 1 4 5 can be set Check the ratio with side tone in CW mode e Push F 3 DEF to select a default ratio of 1 1 3 0 42 43 4 RECEIVE AND TRAN
81. c PTT start ON t HHHMH Minus 4 0 MHZ offset 4 ARAMHz Plus 4 0 MHz offset OFF Split lock function OFF default OFF Automatic tuner start OFF default OFF Automatic PTT start OFF default SETMODE 12 E Miscellaneous others set mode continued LAHTI Switch You can set the antenna connector selection to auto Hut Antenna switch is activated and the matic manual or non selection when using 1 an selection is automatically memorized tenna only default When Auto is selected the antenna switch is acti Manual AENA SMe AAEE vated and the band memory memorizes the selected OFF Antenna switch is deactivated and antenna See p 87 for details ANT 1 is always selected When Manual is selected the antenna switch is ac tivated and selects an antenna manually When OFF is selected the antenna switch is not ac tivated and does not function The ANT1 connector is always selected in this case mark frequency is switched between 1275 1615 and 2125 Hz RTTY mark 1275 Hz RTTY mark This item selects the RTTY mark frequency RTTY 2125 lero 2125 Hz frequency default frequency RTTY Shift Width This item adjusts the RTTY shift width There are 3 17a ey selectable values 170 200 and 425 Hz 170 Hz RTTY shift 425 Hz RTTY shift frequency default frequency ETTY Resins Polarity This item selects the RT TY keying polarity Normal or Horma l kKeversae reverse keying polarity can b
82. cceeeeeeeeeees 23 E Selecting an operating band rrrnnrnernnnnennnn 24 E Frequency setting rrrrnnrrvnevrnnanevnenennanennunenne 25 E Operating mode selection rrnrrrrnnrrrvnnnnrnnnn 29 ME Volume setting rrrrenervnnervnnervnnnevnunennunennenens 29 E Squelch and receive RF sensitivity 30 ME Meter function rrrarerrnrrrrnnrrnnnnrvnnnennnnennnnene 31 KR NN eee 31 WE Basic transmit operation rrrrrrrnrernnrnnnnevnner 32 4 RECEIVE AND TRANSMIT ssassn 33 54 E Operating SSB asrasa 33 E Operating OW rrrrrnnrnrvnnnnnrorvrnnnnrnnnrnnnrennnnnnne 35 E Electronic CW keyer cccceeeeesseeeeeeeeeeenees 38 E Operating RTTY FSK rrrrrennnnnrrrnnnnnnnnnnennnn 44 E Operating AM rrrnnrnnnnrenvnnnrrrnrnnnnnnnnrnnnsennnnnnne 50 E Operating FM rrrnrnnnnrrnnnnnnrrnrnnnnnnnnrnnnsennnnnnre 51 M Repeater operation ccccccseecceeeeseeeeeeeeeess 52 Mi Tone squelch operation ccccseceeseeeeeeeeees 53 E Data mode SSTV PSK31 operation 54 5 FUNCTION FOR RECEIVE mmnnnnnnnnnnvvvvvvvveeen 55 64 E Spectrum SCOPE screen rrrrrrrnnnrrvnnrrevnnnneennn 55 MBF CAND ee 57 WE Attenuator rrrarerrnrnrnrevanennernvnnnnnnennnrnnnsnnnnen 57 MERIT function 20 00 eee cc eeeeceeeeceeeeeeeeeeseeeeees 58 E AGC function EE 59 M Twin PBT operation ccccccccseeeeeeeeeeeeeeees 60 Mi IF filter selection rrrrnnrrrnnnrrnnnevnnnrnranen
83. ceiver s power is OFF Push to turn power ON Turn the optional DC power supply ON in advance e A D converter calibration of the DSP unit starts and it takes approx 10 sec While transceiver s power is ON O Push momentarily to toggle the timer function ON and OFF p 91 The TIMER indicator in this switch lights while the timer function is ON O Push for 1 sec to turn power OFF 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 HEADPHONE JACK PHONES Accepts headphones e Output power 5 mW with an 8 load e When headphones are connected the internal speaker or connected external speaker does not function ELECTRONIC KEYER JACK ELEC KEY Accepts a paddle to activate the internal electronic keyer for CW operation p 38 e Selection between the internal electronic keyer bug key and straight key operation can be made in keyer set mode p 43 straight key jack is separately available on the rear panel See KEY on p 11 e Keyer polarity dot and dash can be reversed in keyer set mode p 43 4 channel memory keyer is available for your conve nience p 40 MICROPHONE CONNECTOR MIC Accepts the supplied or optional microphone See p 114 for appropriate microphones See p 18 for microphone connector information OG AF CONTROL AF inner control
84. ch F 1 T1 F 4 T4 again to stop playback if de sired 6 Push EXIT SET twice to exit the voice memory screen e Programming a memory name for transmit Memory channels can be tagged with alphanumeric names of up to 20 characters each Capital letters small letters numerals some symbols ES VA A4 K ot lt gt 1l_ and spaces can be used See step 5 below 1 Record a message as described at left 2 Call up the voice memory recording screen as de scribed in steps to at left 3 Push F 5 NAME to enter memory name edit condition cursor appears and blinks 4 Push F 5 T1 T4 several times to select the de sired voice memory _ _ AE Selected character Character group keys 5 Input the desired character by rotating the tuning dial or by pushing the band key for number input e Push ABC or abc to toggle capital and small letters e Push 123 or etc to toggle numerals and symbols e Push F 1 or F 2 for cursor movement e Push F 3 DEL to delete the selected character Push F 4 SPACE to input a space Pushing the transceiver s keypad 0 9 can also enter numerals 6 Push EXIT SET to input and set the name e The cursor disappears T Repeat steps 4 to to program another voice memory s name if desired Push EXIT SET twice to exit the voice memory screen 74 75 7 VOICE RECORDER FUNC
85. ct the Time Now item won PEE i TD VFO FILZ ar WFO USB qr wpt CLOCK2 Function CLOCK2 Offset Timer Function Power ON Timer Set Power OFF Period E Timer function activity The timer functions can be switched ON and OFF G Push EXIT SET several times to close a multi function screen if necessary 2 Push EXIT SET for 1 sec then F 4 TIME to enter timer set mode 3 Push F 1 or F 2 W to select the Timer Func tion item Time How CLOCK2 Function CLOCK2 Offset Timer Function Power ON Timer Set Power OFF Period 4 Set the current time using the tuning dial TIME set Push SET blinks CLOCK2 Function CLOCK2 Offset Timer Function Power OH Timer Set Power OFF Berin l 7 amin TIME set Push SET I 5 Push F 4 SET to enter the set time Push EXIT SET to cancel the setting Set time appears 6 Push EXIT SET twice to exit timer set mode 4 Select the timer function activity using the tuning dial ON Activates the timer functions when POWER is pushed momentarily default Deactivates the timer functions even when POWER is pushed momentarily Time Hows CLOCK2 Function CLOCK Offset Fower ON Timer Set 19 36 Power OFF Period 5 Push EXIT SET twice to exit timer set mode CLOCK AND TIMERS 11 ME 90 91 11 CLOCK AND TIMERS E Setting power on time The transceiver can be set to turn ON automatically at a specified time
86. d TIMER co POWER TRANSMIT VU I O Z m ep m m O A m oooaorg i s EN F m O Ca E2 3 Pa Ces _ O O Q CW RTTY AM FM FILTER EXIT SET MER MIC GAIN RF POWER CC I Y PEED c a EEE P BK IN 1 LAY KE EE EE COMPRESSION LEVEL CONTROL COMP p 67 Adjusts the speech compression level in SSB Compression Compression level decreases level increases COMP SEMI BREAK IN DELAY CONTROL BK IN DELAY Adjusts the transmit to receive switching delay time for CW semi break in operation Short delay for Long delay for high speed keying slow speed keying 2 dot BINDE d ELECTRONIC CW KEYER SPEED CONTROL KEY SPEED p 35 Adjusts the internal electronic CW keyer s speed 6 wpm min to 60 wpm max can be set Slow Fast KEY SPEED MULTI FUNCTION SWITCHES Push to select the functions indicated in the LCD display to the right of these switches e Functions vary depending on the operating condition Selects the antenna connector between ANT1 and ANT2 when pushed p 87 gt Turns the RX ANT receive antenna ON and OFF when pushed for 1 sec When the receive antenna is activated the antenna which is connected to the ANT1 or ANT2 is used for transmission only 7 When a transverter is in use this ANT f does not function and XVERT appears Selects RF power Po SWR ALC or COMP meter
87. d OFF using set mode p 98 MAIN SUB CHANGE SWITCH CHANGE Switches the frequency and selected memory channel between main and sub readouts when pushed e Switches between transmit frequency and receive fre quency when the split frequency function is ON p 70 Equalizes the sub readout frequency to the main readout frequency when pushed for 1 sec PANEL DESCRIPTION 1 VFO MEMORY SWITCH VFO MEMO Switches the selected readout operating mode between the VFO mode and memory mode when pushed pgs 23 76 Transfers the memory contents to VFO when pushed for 1 sec p 79 MAIN SUB M SCOPE SWITCH MAIN SUB M SCOPE Push momentarilly to select access to the main or sub readout The sub readout frequency is displayed in outline or mesh font The sub readout functions only during split operation or dualwatch gt Push for 1 sec to turn the mini spectrum scope screen indication ON and OFF The mini spectrum scope screen can be indicated with another screen such aS memory set mode screen simultaneously LCD FUNCTION DISPLAY See p 9 for details Shows the operating frequency function switch menus spectrum scope screen memory channel screen set mode settings etc 1 PANEL DESCRIPTION E LCD display O TX INDICATOR Indicates the frequency readout for transmission VFO MEMORY CHANNEL INDICATOR pgs 23 76 Indicates the VFO mode or selected memory chan nel number
88. dress for each IC 756PROIII in the range 01h to 7Fh CI U Transceive Transceive operation is possible with the IC 756PROIII Cir OFF connected to other Icom HF transceivers or receivers Timansceive ON Transceive OFF When ON is selected changing the frequency op en erating mode etc on the IC 756PROIII automatically changes those of connected transceivers or re ceivers and vice versa IV with IC 7 When connecting the IC 756PROIII to the IC 735 for ie OFF transceive operation you must change the operating 4 bytes of frequency data 5 bytes of frequency data frequency data length to 4 bytes default This item must be set to ON only when operating the transceiver with the IC 735 OPTION INSTALLATION 13 Hd E Opening the transceiver s case Follow the case and cover opening procedures shown 7 CAUTION DISCONNECT the DC power cable here when you want to install an optional unit or adjust Y from the transceiver before performing any work on the internal units etc G the transceiver Otherwise there is danger of elec 7 tric shock and or equipment damage 1 Remove 2 screws from the left side of the trans ceiver to remove the carrying handle as shown below of of 2 Remove 7 screws from the top of the transceiver and 4 screws from the sides then lift up the top cover
89. e ALC meter reading doesn t go outside the ALC zone kr EE N 4 Release PTT microphone to return to receive In addition the transceiver can display the multi func tion digital meter in the LCD display which displays all transmit meters simultaneously 32 E Operating SSB TRANSMIT TX indicator RX indicator Band keys Ge am o OG em 0 For 00000000 iS AF MIC GAIN SSB Tuning dial Convenient functions for receive e Preamp p 57 Push P AMP several times to set the preamp OFF preamp 1 ON or preamp 2 ON P AMP1 or P AMP2 appears when the preamp 1 or preamp 2 is set to ON respectively depending on op erating frequency band e Attenuator p 57 Push ATT several times to set the attenuator in 6 dB steps ATT and attenuation level appear when the attenua tor is set to ON e Noise blanker p 62 Push NB switch to turn the noise blanker ON and OFF Noise blanker indicator in NB switch lights when the noise blanker is set to ON Push NB for 1 sec to enter the noise blanker level set mode then rotate tuning dial to adjust the threshold level e Twin PBT passband tuning p 60 Rotate TWIN PBT controls inner outer e Push PBT CLR to clear the
90. e ATX frequency Adds the ATX shift frequency to the operating frequency when pushed for 1 sec v What is the ATX function The ATX shifts the transmit frequency without shifting the re ceive frequency This is useful for simple split frequency op eration in CW etc CLEAR SWITCH CLEAR pgs 58 68 Clears the RIT ATX shift frequency when pushed for 1 sec default The response time for 1 sec or momentarily can be selected on the quick RIT ATX clear setting p 102 amp MANUAL NOTCH FILTER CONTROL NOTCH inner control p 64 Varies the peak frequency of the manual notch fil ter to pick out a receive signal from interference while the manual notch function is ON e Notch filter center frequency SSB 0 Hz to 5100 Hz CW CW pitch freq 900 Hz to CW pitch freq 4200 Hz AM 5100 Hz to 5100 Hz NOTCH CW PITCH Lower frequency Higher frequency amp CW PITCH CONTROL CW PITCH outer control p 36 Shifts the received CW audio pitch and monitored CW audio pitch without changing the operating fre quency NOTCH gt CW PITCH Lower frequency DN Higher frequency Approx 300 Hz Approx 900 Hz PANEL DESCRIPTION 1 NOTCH SWITCH NOTCH p 64 Switches the notch function between auto man ual and OFF in SSB and AM modes Turns the manual notch function ON and OFF when pushed in CW mode Turns the auto notch function ON and OFF when pushed in FM mode AN appears on the displ
91. e selected Normal polarity default Reverse polarity When reverse polarity is selected Mark and Space are reversed Normal Key open close Mark Space Reverse Key open close Space Mark 100 101 12 SET MODE E Miscellaneous others set mode continued SPEECH Lanaua9e When the optional UT 102 VOICE SYNTHESIZER UNIT IS installed you can select between English and Japan ese as the language See p 104 for unit installation SPEECH SPeed When the optional UT 102 VOICE SYNTHESIZER UNIT IS installed you can select between faster or slower synthesizer output See p 104 for unit installation SPEECH 5 Level When the optional UT 102 VOICE SYNTHESIZER UNIT IS installed you can have frequency mode and signal level announcement Signal level announcement can be deactivated if desired When OFF is selected the signal level is not an nounced See p 104 for unit installation This item sets the number of memo pad channels available 5 or 10 memo pads can be set EnSlish English announcement default HIGH Faster announcement default OH Signal level announcement default 5 memo pads default Japanese announcement LLI Slower announcement OFF No signal level announcement l 10 memo pads E Miscellaneous others set mode continued MATH OTAL Auto TS This item sets the auto tuning step function When ro tating the tuning dial rapidly the tuning s
92. e tune the antenna turn power OFF and ON adjust the antenna cable length This is effective for higher frequencies in some cases ANTENNA TUNER OPERATION 10 N Y CAUTION NEVER transmit with the tuner ON when no antenna is connected This will damage 7 the transceiver Be careful of the antenna selection OO TUNER switch 0000000 PTT TUNER START The tuner is always tuned when the PTT is pushed after the frequency is changed more than 1 from last tuned frequency This function removes the push and hold TUNER operation and activates for the first transmission on a new frequency This function is turned ON in set mode p 99 e Tuning a narrow bandwidth antenna Some antennas especially for low bands have a nar row bandwidth These antennas may not be tuned at the edge of their bandwidth therefore tune such an antenna as follows Suppose you have an antenna which has an SWR of 1 5 1 at 3 55 MHz and an SWR of 3 1 at 3 8 MHZ 1 Push TUNER to turn the antenna tuner ON 2 Select CW mode 3 Turn OFF the break in function pgs 4 66 4 Push TRANSMIT to set to the transmit condition 5 Set 3 55 MHz and key down 6 Set 3 80 MHz and key down T Push TRANSMIT to return to the receive condition 89 10 ANTENNA TUNER OPERATION E Optional external tuner operation AH 4 AH 3 HF AUTOMATIC ANTENNA TUNER The AH 4 matches the IC 756PROIII to a long wire a
93. e tuning dial ant qrwpt pp Pushing F 3 DEF sets the selected item to the default 1__14 198 8 _USE value of the item His sse teu me LS Push EXIT SET twice to exit level set mode ox ren Side Tone Level Side Tone Level Limit e Use headphones to prevent feedback GE BeePibever nm e Set the transmit tone settings to the 0 dB positions gt to check the unaltered characteristics of transmit ter or microphone MMAAL E Split frequency operation Split frequency operation allows you to transmit and receive in the same mode on two different frequen cies The split frequency operation is basically per formed using 2 frequencies on the main and sub readouts The following is an example of setting 21 290 MHz for receiving and 21 310 MHz for transmitting M Set 21 290 MHz USB in VFO mode 24k EN 12 00 Ci WFO FILZ ep WFO USB qrwpt p p i Le L R GA LG Q Push SPLIT momentarily then push CHANGE for 1 sec The quick split function is much more convenient for selecting the transmit frequency See the next section for details The equalized transmit frequency and appear on the LCD TX appears to show the transmit frequency s readout 3 Rotate the tuning dial while pushing XFC to set the transmit frequency to 21 310 MHz The transmit frequency can be monitored while pushing XFC or using dualwatch WFO oe eee ee oa o S TD WFO USB 2 a
94. een If the transmit voice memory channel T1 T4 appears push F 5 T R to select receive voice memory chan nel 3 Push the desired memory channel switch F 1 R1 F 4 R4 momentarily to playback PLAY appears 4 Push the selected memory channel switch F 1 R1 F 4 R4 again to stop playback if de sired Playback is terminated automatically when all of the recorded contents in the channel are played or after 15 sec 5 Push EXIT SET twice to exit the voice memory screen 72 73 7 VOICE RECORDER FUNCTIONS E Digital voice recorder continued e One touch voice recording To record the receiving signal contents immediately one touch voice recording is available 1 Push REC PLAY for 1 sec while receiving a sig nal to start recording REC flashes e Records audio into the channel R4 2 Push REC PLAY momentarily to stop recording e Recording is automatically terminated after 30 min 7 IMPORTANT Push REC PLAY to stop recording before or 77 When 15 sec has passed from the start of 7 recording e One touch playback The recorded audio in the channel R4 can be play back without selecting the voice memory screen M Push REC PLAY to playback PLAY appears e Playback the recorded audio in the channel R4 2 Push REC PLAY again to stop playback if de sired Playback is terminated automatically when all of the recorded contents in the chan
95. er p 62 Push NB switch to turn the noise blanker ON and OFF Noise blanker indicator in NB switch lights when the noise blanker is set to ON Push NB for 1 sec to enter the noise blanker level set mode then rotate tuning dial to adjust the threshold level e Twin PBT passband tuning p 60 Rotate TWIN PBT controls inner outer e Push PBT CLR to clear the settings 1 Push a band key to select the desired band 2 Push CW RTTY to select CW After CW mode is selected push CW RTTY for 1 sec to toggle between CW and CW R modes CW or CW R appears 3 Rotate the tuning dial to simultaneously tune a de sired signal and its side tone The S meter indicates received signal strength when signal is received 4 Rotate AF to set audio to a comfortable listening level 6 Push TRANSMIT to transmit The TX indicator lights red 6 Use the electric keyer or paddle to key your CW sig nals The power meter indicates transmittted CW output power Adjust CW speed with KEY SPEED e Adjustable within 6 60 WPM Push TRANSMIT to return to receive e Noise reduction p 64 Push NR switch to turn the noise reduction ON and OFF e Rotate NR control to adjust the noise reduction level e Noise reduction indicator in NR switch lights when the noise reduction is set to ON e Notch filter p 64 Push NOTCH switch to turn the manual notch function ON and OFF Ro
96. er memorizes 3 fre quencies in each band After pushing F INP ENT enters a keyed fre quency or memory channel Pushing F INP ENT or AT V is necessary at the end pgs 25 76 e g to enter 14 195 MHz push F INP ENT 1 4 1 9 5 F INPJENT MEMO PAD WRITE SWITCH MP W p 81 Programs the selected readout frequency and op erating mode into a memo pad The 5 most recent entries remain in memo pads The transmit frequency is programmed when pushed to gether with XFC The memo pad capacity can be expanded from 5 to 10 in set mode for your convenience p 101 SPLIT SWITCH SPLIT p 70 Turns the split function ON and OFF when pushed Turns the split function ON equalizes the sub readout frequency to the main readout and sets the sub readout for frequency input when pushed for 1 sec in non FM modes Quick split function The offset frequency is shifted from the main readout frequency in FM mode pgs 52 99 The quick split function can be turned OFF using set mode p 98 Turns the split function ON and shifts the sub readout frequency after inputting an offset 4 MHz in 1 KHz steps DUALWATCH SWITCH DUALWATCH p 63 Turns the dualwatch function ON and OFF when pushed Turns the dualwatch function ON and equalizes the sub readout frequency to the main readout when pushed for 1 sec Quick dualwatch function The quick dualwatch function can be turne
97. escribed at left 2 Push F 5 SET to select the spectrum scope set mode 3 Push F 1 4 to select the Scope during Tx item 4 Rotate the tuning dial to display the spectrum scope while transmitting or not SCOPE SET E Score during Tx 5 Push EXIT SET to exit spectrum scope set mode e Maximum level hold function The spectrum scope shows the peak level holding function Peak levels are displayed in the background of the current spectrum in a different color until the re ceive frequency changes This can be deactivated if desired 1 Call up the scope screen as described at left 2 Push F 5 SET to select the spectrum scope set mode 3 Push F 2 to select the Max Hold item 4 Rotate the tuning dial to turn the peak level holding function ON or OFF Score during Tx Max Hold 5 Push EXIT SET to exit spectrum scope set mode Y If a strong signal is received a ghost waveform 4 may appear Push F 2 ATT several times to acti f vate the spectrum scope attenuator in this case NYY FUNCTION FOR RECEIVE 4 Mini scope screen This mini scope screen can be displayed with another 1 Push MAIN SUB M SCOPE for 1 sec to toggle screen indication such as set mmode menu decoder the mini scope indication ON and OFF screen memory list screen etc simultaneously M SCOPE GB LEZ d Eee i 1 o F peepee 1
98. eset to the memorized point TUNER OPERATION Push the TUNER switch to turn the internal an tenna tuner ON The antenna is tuned automati cally when the antenna SWR is higher than 1 5 1 When the tuner is ON the TUNER switch lights MANUAL TUNING During SSB operation at low voice levels the internal tuner may not be tuned correctly In Such cases man ual tuning is helpful Push TUNER for 1 sec to start manual tuning side tone is emitted and TUNER blinks while tuning If the tuner cannot reduce the SWR to less than 1 5 1 after 20 sec of tuning the TUNER switch indicator goes out AUTOMATIC TUNER START HF bands only If you want to deactivate the tuner under conditions of VSWR 1 5 1 or less use the auto tuner start func tion and turn the tuner OFF This function activates the tuner automatically when the SWR exceeds 1 5 1 This function is turned ON in set mode p 99 NOTES If the tuner cannot tune the antenna Check the following and try again the ANT connector selection the antenna connection and feedline the unaltered antenna SWR Less than 3 1 for HF bands Less than 2 5 1 for 50 MHz band the transmit power 8 W for HF bands 15 W for 50 MHz band the power source voltage capacity If the tuner cannot reduce the SWR to less than 1 5 1 after checking the above perform the following repeat manual tuning several times tune with a 50 Q dummy load and r
99. fault SSB TEL MID L These items set the transmission passband width for middle setting by selecting the lower and higher fre quencies Lower freq 100 300 default and 500 Hz oob TEM MID H These items set the transmission passband width for middle setting by selecting the lower and higher fre quencies Higher freq 2500 2700 default and 2900 Hz sab TEL HAR L These items set the transmission passband width for narrow setting by selecting the lower and higher fre quencies Lower freq 100 300 and 500 Hz default Lote _ Ade 0 dB default Lomi 1 Ade 0 dB default i 100 Hz default 2900 2900 Hz default SAA 300 Hz default rad 2700 Hz default JHE 500 Hz default E Level set mode continued SSB TEL MAR H These items set the transmission passband width for narrow setting by selecting the lower and higher fre quencies Lower freq 2500 default 2700 and 2900 Hz Monitor Level This item adjusts the transmit IF signal monitor level from 0 to 100 in 1 steps See p 69 for details This item adjusts the CW side tone level from 0 to 100 in 1 steps See p 69 for details Limit This item allows you to set a maximum volume level for CW side tones CW side tones are linked to the AF control until a specified volume level is reached further rotation of the AF control will not increase the volume of the CW side tones This item adjusts the vo
100. filter shape from sharp and soft for each SSB or CW mode respectively 5 Push the ENTER SET twice to exit the set mode E Noise blanker The noise blanker eliminates pulse type noise such as from car ignitions The noise blanker is not avail able for FM mode 1 Push the NB switch to turn the noise blanker ON NB indicator lights 2 Push the NB switch for 1 sec to enter the noise blanker level set mode 3 Rotate the tuning dial to adjust the noise blanker level Push F 3 DEF for 1 sec to return to default value 4 Push the NB switch to turn the noise blanker OFF NB indicator goes off 7 When using the noise blanker received signals 7 may be distorted if they are excessively strong FUNCTION FOR RECEIVE NB switch EXIT SET switch Tuning dial D 62 D FUNCTION FOR RECEIVE E Dualwatch operation Dualwatch monitors 2 frequencies with the same mode simultaneously During dualwatch both frequencies should be on the same band because the bandpass filter in the RF cir cuit is selected for the main readout frequency 1 Set a desired frequency 2 Push DUALWATCH for 1 sec e Equalized receive frequency and appear in the LCD This quick dualwatch function can be turned OFF in set mode p 98 e Pushing DUALWATCH momentarily activates the du alwatch with the previously operated frequency e Scanning during dualwatch Scanning operates o
101. g style the type of DSP filter shape for SSB and CW can be selected 1 Push the EXIT SET several times to close a multi function screen if necessary Q Push the EXIT SET switch for 1 sec to enter set mode 3 Push the F 3 DSP switch to enter the DSP filter set mode 4 Push one of F2 SSB FIL or F4 CW FIL to se lect the desired DSP filter shape from sharp and soft for SSB or CW mode respectively 5 Push ENTER SET twice to exit the DSP filter set mode SESTMODE 12 5 Input the desired character by rotating the tuning dial or by pushing the band key for number input e Push ABC to select capital letters e Push 123 or etc to toggle numerals and symbols e Push F 1 or F 2 for cursor movement e Push F 3 DEL to delete the selected character Push F 4 SPACE to input a space 6 Push EXIT SET to input the set name The cursor disappears 7 Push EXIT SET to exit the set mode screen e Opening screen example O ICOM IC 756PROM NOW CALIBRATING DIGITAL SIGNAL PROCESSOR PLEASE WAIT FOR 10sec J A3YUA 96 97 12 SET MODE E Timer set mode Time Mow This item sets the current time for the built in 24 hour Clock See p 90 for details CLOCKS Furth ton This item turns the clock 2 indication ON and OFF The clock 2 is convenient to indicate the UTC or other country s local time etc ON The clock 2 is displayed below the local time i
102. gs cannot be written e Calling up a frequency from a memo pad You can simply call up the desired frequency and op erating mode of a memo pad by pushing MP R sev eral times Both VFO and memory modes can be used The frequency and operating mode are called up starting from the most recently written When you call up a frequency and an operating mode from memo pads with MP R the previously dis played frequency and operating mode are automati cally stored in a temporary pad The frequency and operating mode in the temporary pad can be recalled by pushing MP R several times You may think there are 6 memo pads because 6 different frequencies 5 are in memo pads and 1 is in the tempo rary pad are called up by MP R 7 If you change the frequency or operating mode 7 called up from a memo pad with the tuning dial 7 etc the frequency and operating mode in the tem 7 porary pad are erased Memo pads are convenient when you want to memo rize a frequency and operating mode temporarily such as when you find a DX station in a pile up or when a desired station is busy for a long time and you want to temporarily search for other stations Use the transceiver s memo pads instead of relying on hastily scribbled notes that are easily misplaced Displayed frequency and mode Newest y Oldest The oldest written frequency U and mode are erased MEMO PADS Push _MP R_ VFO or MEMORY mode display
103. gt gt MG group i keys m 5 Input the desired character by rotating the tuning dial or by pushing the band key for number input e Push ABC or abc to toggle capital and small letters e Push 123 or etc to toggle numerals and symbols e Push F 1 or F 2 for cursor movement e Push F 3 DEL to delete the selected character Push F 4 SPACE to input a space Pushing the transceiver s keypad 0 9 can also enter numerals 6 Push EXIT SET to input and set the name e The cursor disappears 7 Repeat steps 3 to to program another memory channel s name if desired Push EXIT SET to exit the memory channel screen 80 81 8 MEMORY OPERATION E Memo pads The transceiver has a memo pad function to store fre quency and operating mode for easy write and recall The memo pads are separate from memory channels The default number of memo pads is 5 however this can be increased to 10 in set mode if desired p 101 e Writing frequencies and operating modes into memo pads You can simply write the accessed readout frequency and operating mode by pushing MP WI When you write a 6th frequency and operating mode the oldest written frequency and operating mode are automatically erased to make room for the new set tings 7 Each memo pad must have its own unique combi Y nation of frequency and operating mode memo 7 pads having identical settin
104. h MIC at this step if necessary T Push TRANSMIT or release PTT microphone to return to receive e Noise reduction p 64 Push NR switch to turn the noise reduction ON and OFF e Rotate NR control to adjust the noise reduction level e Noise reduction indicator in NR switch lights when the noise reduction is set to ON e Notch filter p 64 Push NOTCH switch to turn the auto or manual notch function ON and OFF e Rotate NOTCH control to set the attenuating fre quency for manual notch operation Notch indicator in NOTCH switch lights when either the auto or manual notch is set to ON e AGC auto gain control p 59 Push AGC switch several times to select AGC FAST AGC MID or AGC SLOW Push AGC for 1 sec to enter the AGC set mode Rotate tuning dial to adjust the time constant e VOX voice operated transmit p 65 Push VOX to turn the VOX function ON and OFF VOX ON appears when the VOX function is set to ON e Audio tone control p 93 Push EXIT SET for 1 sec then F 1 LEVEL to enter level set mode Select an item with F 1 AJ F 2 VW then rotate the tuning dial to adjust the audio tone 50 4 RECEIVE AND TRANSMIT E Operating FM TRANSMIT TX indicator RX indicator Band keys 2 0 aS Ga as 0 NMO00000
105. hesizer 00 all data 01 frequency and S meter level 02 receive mode AF level setting 0 max CCW to 255 max CW RF level setting 0 max CCW to 255 11 o clock SQL level setting 0 11 o clock to 255 max CW NR level setting 0 min to 255 max Inside TWIN PBT setting or IF shift setting 0 max CCW 128 center 255 max CW Outside TWIN PBT setting 0 max CCW 128 center 255 max CW CW PITCH setting 0 low pitch to 255 high pitch RF POWER setting 0 mini to 255 max MIC GAIN setting 0 mini to 255 max KEY SPEED setting 0 slow to 255 fast NOTCH setting 0 low freq to 255 high freq COMP setting 0 mini to 255 max BK IN DELAY setting O short delay to 255 long delay BAL level setting 0 max CCW 128 center 255 max CW NB level setting 0 mini to 255 max Monitor gain setting 0 0 to 255 100 C ONTROL COMMAND 16 16 Level data 17 Level data 18 Level data 19 Level data 50 00 VOX gain setting 255 100 Anti VOX gain setting 0 0 to 255 100 LCD contrast setting 0 0 to 255 100 LCD bright setting 255 100 Read squelch condition Read S meter level Read Po meter level Read SWR meter level Read ALC meter level Read COMP meter level Preamp 0 OFF 1 preamp 1 2 preamp 2 AGC selection 1 Fast 2 Mid Eselet 0 0 to 0 0 to Monitor 0 OFF 1 ON VOX function 0 OFF 1 ON Break in O OFF 1 semi break
106. his item sets the font of the frequency readouts There are 7 selectable fonts Basic1 Basic2 Pop 7seg 7 segment numeral Italic 1 Italic 2 and Clas SIC Memors Hane This item sets the memory name indication ON and OFF See p 80 for details lies GH 60 default bil I Sex 50 default l of J 4 Horizontal position is 4 default ee ee S Backlight level is 8 Maximum default F A type LCD screen default Italicz Italic 2 font default DH OFF Memory name is displayed Memory name is not dis default played E Display set mode continued Ma Call Your call sign etc can be displayed in the opening screen when turning power ON Up to 10 characters can be programmed Capital letters numerals some symbols and spaces can be used 1 Push EXIT SET several times to close a multi function screen if necessary 2 Push EXIT SET for 1 sec then F 2 DISP mo mentarily to select the display set mode screen 3 Push F 2 several times to select the My Call item BE DP E a y En Bright LCD Horizon Back light lt Switches gt DisPlay Type DisPlay Font Memory Name OW My Call JASYUA 4 Push F 4 EDIT to edit cursor appears and blinks Selected ABC DISPLAY SET character LCD Horizon Backliasht lt Switches Character group keys DisPlay TyPe DisPlay Font Memory Name E DSP filter set mode To suit your operatin
107. hone can also be used Enter 100 or 101 to select scan edge channel P1 or P2 3 To return to VFO mode push VFO MEMO again respectively 4 Push A or V to select the desired memory channel 76 P 8 MEMORY OPERATION E Memory channel screen The memory channel screen simultaneously shows 7 memory channels and their programmed contents 13 memory channels can be displayed in the wide mem ory channel screen You can select a desired memory channel from the memory channel screen e Selecting a memory channel using the memory channel screen Push EXIT SET several times to close a multi function screen if necessary 2 Push F 4 MEMORY to select the memory chan nel screen F 5 WIDE switches the standard and wide screens r WFO USE FIL2 qgqrwopet 99 y Fi 0 500 600 LSB FLZ SCAN EDGE P2 29 999 99 USB FL2 SCAN EDGE 14 100 08 USB FL2 3 Rotate the tuning dial while pushing F 2 SET to select the desired memory channel A and V can also be used 4 Push EXIT SET to exit the memory channel screen e Confirming programmed memory channels 1 Select the memory channel screen as described above 2 Rotate the tuning dial while pushing F 1 ROLL to scroll the screen 3 Push F 2 SET to select the highlighted memory channel if desired 99 0 7 0 500 00 LSB FLZ SCAN EDGE 29 999 99 USB FLZ SCAN EDGE gt E m 14
108. ier including an automatic antenna tuner Has Light weight switching regulator automatic tuning and band selection capability Full break in QSK oper system power supply ation is possible The amplifier oower supply unit and the remote control e Output voltage 13 8 V DC unit are separated e Max current drain 25 A AH 4 HF 50 MHz AUTOMATIC AH 2b ANTENNA ELEMENT SM 20 DESKTOP MICROPHONE ANTENNA TUNER A 2 5 m long an tenna element for mobile operation with the AH 4 e Frequency Specially designed to tune a long ae wire antenna for portable or mobile A Unidirectional electret microphone HF operation The PTT tuner start es EA for base station operation Includes function provides simple operation UP DOWN switches and a low Input power rating 120 W cut function PYFTTTTTYTTTT Ut HM 36 HAND MICROPHONE Hand microphone equipped with UP DOWN switches SP 23 EXTERNAL SPEAKER UT 102 VOICE SYNTHESIZER UNIT Announces the receive frequency mode and S meter level in a clear electroni cally generated voice in English or Japanese 4 audio filters headphone jack can For remote transceiver control connect to 2 transceivers using a personal computer You Input impedance 8 Q can change frequencies operating Max input power 5 W mode memory channels etc About DC power supply About IC PW1 LINEAR AMPLIFIER The use of IC 756PROIII 433 434 435 438 440 in com The IC PW1 LINEAR AMPLI
109. imes e etc appears when 123 is pushed when 123 char acter group is selected Selectabel characters with the tuning dial Key selection Editable characters A to Z capital leters 0 to 9 numbers n 7 Select the desired character by rotating the tuning dial or by pushing the band key for number input Push F 1 or F 2 for cursor movement e Push F 3 DEL to delete the selected character Push F 4 SPACE to input a space Repeat step until the desired contents are input 9 Push F 5 RT1 8 to select the next memory channel and repeat step 0 for character input if desired Push EXIT SET to set the contents and exit RTTY memory edit screen 48 4 RECEIVE AND TRANSMIT RTTY decoder set mode This set mode is used to set the decode USOS func e Setting the contents tion etc 1 Push EXIT SET several times if necessary F 3 DEL 2 Push CW RTTY to select RI TY mode 3 Push F 83 DECODE then F 1 MENU1 to select posen RTTY decode menu 2 4 Push F 4 SET to select RTTY decode set mode 5 Push F 1 4 or F 2 V to select the desired set item 6 Set the desired condition using the tuning dial e Push F 3 DEF for 1 sec to select a default condition or value F 1 A F 2 EXIT SET T Push EXIT SET to exit from set mode
110. in 2 full break in Manual notch O OFF 1 ON RTTY filter 0 OFF 1 ON Twin peak filter 0 OFF 1 ON Dial lock 0 OFF 1 ON Read the transceiver ID Send read memory contents see p 112 for details Send read band stacking register contents see p 112 for details Send read memory keyer con tents see p 112 for details Send read the selected filter width 0 50 Hz to 40 31 3600 2700 Hz Send read the selected AGC time constant O OFF 1 0 1 0 3 sec to 13 6 0 8 0 sec Send read SSB TX Tone Bass level 0 min to 10 max Send read SSB TX Tone Treble level O min to 10 max Send read MONITOR gain O min to 255 max Send read CW side tone gain O min to 255 max Send read CW side tone gain limit O OFF 1 ON Send read beep gain O min to 255 max Send read beep gain limit 0 OFF 1 ON Send read LCD contrast 0 0 to 255 100 Send read LCD backlight 0 0 to 255 100 110 16 CONTROL COMMAND Command table continued 111 Send read LCD horizontal position 0 1 to 7 8 Send read switch backlight O 1 to 7 8 Send read display type O A 1 B 2 C 3 D 4 E 5 F 6 G 7 H Send read display font 0 Basic1 1 Basic2 2 Pop 3 7seg 4 Iltalic1 5 italic2 6 Classic Send read memory name O OFF 1 ON Send read my call setting 10 char acter see p 112 Send read current time 0000 to 2359 Send read power ON timer set 0000 to 2359 Send read power OF F period 5 5
111. ing during transmit p 31 Switches the multi function digital meter ON and OFF when pushed for 1 sec Selects one of 2 receive RF preamps or bypasses them p 57 P AMP1 activates 10 dB preamp P AMP2 activates 16 dB high gain preamp v What is the preamp The preamp amplifies 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 bypasses them v What is the attenuator The attenuator prevents a desired signal from distorting when very strong signals are near the desired frequency or when very strong electric fields such as from a broadcast ing station are near your location gt Activates or selects fast middle or slow AGC time constant when pushed p 59 FAST is only available for FM mode Enters the AGC set mode when pushed for 1 sec p 59 7 AGC time constant can be set between 0 1 to U 8 0 sec depends on mode or turned OFF While Y 7 OFF is selected the S meter does not function VY What is the AGC The AGC controls receiver gain to produce a constant audio output level even when the received signal strength is varied by fading etc Select FAST for tuning and select MID or SLOW depending on the receiving condition Turns the VOX function ON and OFF when pushed in a phone mode SSB AM
112. ing on op erating frequency band Attenuator p 57 Push ATT several times to set the attenuator in 6 dB steps ATT and attenuation level appear when the attenua tor is set to ON e Noise blanker p 62 Push NB switch to turn the noise blanker ON and OFF Noise blanker indicator in NB switch lights when the noise blanker is set to ON Push NB for 1 sec to enter the noise blanker level set mode then rotate tuning dial to adjust the threshold level RECEIVE AND TRANSMIT 4 When using your RTTY terminal or TNC consult the manual that comes with the RTTY terminal or TNC 1 Push a band key to select the desired band 2 Push CW RTTY to select RTTY After RTTY mode is selected push CW RTTY for 1 sec to toggle between RTTY and RTTY R modes RTTY or RTTY R appears 3 Push F 3 DECODE to display the decoder screen The IC 756PROIII has a Baudot decoder 4 Rotate the tuning dial to simultaneously tune a de sired signal The S meter indicates received signal strength when signal is received 5 Rotate AF to set audio to a comfortable listening level 6 Push TRANSMIT to transmit The TX indicator lights red 7 Type from the connected PC s keyboard to enter the contents that you want to transmit The text color will be changed when transmitted e Press one of F 1 to F 4 to transmit the TX memory contents Push TRANSMIT to return to receive e Twin PBT
113. is S meter until the noise just disappears open squelch RX indicator light goes out Rotating RF SQL past the threshold point invokes the S meter squelch this allows you to set a minimum signal Shallow Deep level needed to open the squelch Y While rotating the RF gain control noise may be G heard This comes from the DSP unit and does not 7 indicate an equipment malfunction NN 30 31 3 BASIC OPERATION E Meter function The transceiver has 4 transmit meter functions for your convenience Select the desired meter with the METER switch e Analog transmit meter Push METER to select RF power Po SWR ALC or compression level COMP METER switch x OOo O DISPLAY INDICATION MEASUREMENT Indicates the relative RF output power in Indicates the SWR over the transmission line Indicates the ALC level When the meter movement shows the input signal level ex ceeds the allowable level the ALC limits the RF power In such cases reduce the MIC GAIN control Indicates the compression level when the speech compressor is in use COMP E SWR reading The SWR meter indicates the SWR over the trans mission line in all modes G Push TUNER to turn the antenna tuner OFF 2 Push METER several times to select the
114. l TIMER set Push SET blinks Time Now gt CLOCK2 Function CLOCK Offset Timer Function Fower ON Timer Set PFower OFF Periad i 7E TIMER set Push CSE7J 5 Push F 4 SET to enter the set time Push EXIT SET to cancel the setting 6 Push EXIT SET twice to exit timer set mode 3 Push POWER for 1 sec to turn the power OFF The POWER light lights continuously 4 When the set time arrives the power is automati cally turned ON 5 The transceiver emits 10 beeps and turns OFF after the power off period elapses The POWER light blinks while beeping Push POWER momentarily to cancel the power off timer if desired 7 The timer function in timer set mode must be Y turned ON to enable the timer operation See page 497 for details E Set mode description Set mode is used for programming infrequently changed values or conditions of functions This trans ceiver has a level set mode display set mode timer set mode and miscellaneous others set mode e Set mode operation Push EXIT SET several times to close a multi function screen if necessary Q Push EXIT SET for 1 sec to select the set mode menu screen 3 Push F 1 LEVEL F 2 DISP F 3 DSP F 4 TIME or F 5 OTHERS to enter the desired set mode 4 For display or miscellaneous others set mode push F 5 WIDE to toggle wide and normal screen e Start up screen GE re
115. lear function is ON p 102 Reset to 0 00 4 To cancel the ATX function push ATX again se and the shifting frequency disappears e Practical example When you find a DX station on 21 025 MHz CW and the station is picking up stations transmitting slightly up from 21 025 MHz Push RIT and ATX to turn both the RIT and ATX functions ON 2 Rotate RIT ATX to find the DX station s receive frequency 3 When you find the DX station s receive frequency push RIT to turn the RIT function OFF e Now you can transmit the DX station s receive fre quency and receive the DX station s transmit fre quency 21 025 MHz 4 Start transmitting while the station is standing by 68 6 FUNCTION FOR TRANSMIT E Monitor function The monitor function allows you to monitor your trans mit IF signals in any mode through the speaker Use this to check voice characteristics while adjusting SSB transmit tones p 93 The CW sidetone func tions regardless of the MONITOR switch setting MONITOR switch OD PHONES jack f G Push MONITOR The indicator lights when the monitor function is ON 2 Push EXIT SET several times to close a multi function screen if necessary 3 Push EXIT SET for 1 sec then F 1 LEVEL to am E enter level set mode es 4 Push F 1 A or F 2 W to select the monitor near a m oe level item UFO USB Adjust monitor gain using th
116. lected The AH 3 can be used for HF bands only It can not be used for the 50 MHz band TLL e AH 4 AH 3 operation Y Tuning is required for each frequency Be sure to Y re tune the antenna before transmitting when you 7 change the frequency even slightly 1 Set the desired frequency in an HF or 50 MHz band for use with the AH 4 Set the desired fre quency in an HF band for use with the AH 3 The AH 4 AH 3 will not operate on frequencies outside of ham bands 2 Push TUNER for 1 sec The TUNER light blinks while tuning TUNER switch O O O O O O OD 3 The TUNER light lights constantly when tuning is complete When the connected wire cannot be tuned the TUNER light goes out and the AH 4 AH 3 is by passed At that point the antenna wire connection rout is to the transceiver directly and not via the AH 4 AH 3 antenna tuner 4 To bypass the AH 4 AH 3 manually push TUNER See the instruction manual included with each an tenna tuner for their respective operations E Setting the current time The transceiver has a built in 24 hour clock with power off and power on timer functions This is useful when logging QSO s and so on The clock indication is always displayed except after pushing F INP 1 Push EXIT SET several times to close a multi function screen if necessary 2 Push EXIT SET for 1 sec then F 4 TIME to enter timer set mode 3 Push F 1 4 to sele
117. long dis tance communication or when propagation conditions are poor PANEL DESCRIPTION 1 Turns the 1 4 function ON and OFF in SSB data CW and RTTY modes p 27 14 function sets dial rotation to 14 of normal for fine tuning Switches the tone encoder tone squelch function and no tone operation when pushed in FM mode pgs 52 53 Enters the tone set mode when pushed for 1 sec in FM mode pgs 52 53 NOISE REDUCTION LEVEL CONTROL NR outer control p 64 Adjusts the noise reduction level when the noise re duction is in use Set for maximum readability To activate this control turn the noise reduction ON in advance BAL NR Decreases 6 Increases OFF NOISE REDUCTION SWITCH NR p 64 Push to switch the noise reduction ON and OFF The NR indicator in this switch lights green when the function is activated NR NR 2 Noise reduction OFF gt Noise reduction ON NOISE BLANKER SWITCH NB p 62 Switches the noise blanker ON and OFF when pushed The noise blanker reduces pulse type noise such as that generated by automobile igni tion systems This function cannot be used for FM or non pulse type noise The NB indicator in this switch lights green when the function is activated NB NB 2 Noise blanker OFF e Noise blanker ON w Enters the noise blanker level set mode when pushed for 1 sec BALANCE CONTROL BAL inner control p 63 Adjusts the audi
118. lume level for confirmation beep tones from 0 to 100 in 1 steps When beep tones are turned OFF this setting has no effect beer Level Limit This item allows you to set a maximum volume level for confirmation beep tones Confirmation beep tones are linked to the AF control until a specified volume level is reached further rotation of the AF control will not increase the volume of the beep tones SETMODE 12 2o00 2500 Hz default m 1 Sex 50 default lie I Sax 50 default OM OFF CW side tone level is limited CW side tone level is linked with AF default to AF bel 1 5083 50 default ON OFF Beep level is limited with Beep level is linked to AF AF default 94 95 12 SET MODE E Display set mode 7 VO adjust the LCD contrast or backlight wait until 7 the LCD becomes stable 10 min or more after turn 7 ing power ON This is an inherent characteristic of LCDs and LCD backlights and does not indicate a 7 transceiver malfunction MN This item adjusts the contrast of the LCD from 0 to 100 in 1 steps Back light LEDE This item adjusts the brightness of the LCD from 0 to 100 in 1 steps Horizon This item adjusts the horizontal position of the LCD from 1 to 8 This item adjusts the brightness of the switches from 1 to 8 Tape Diese lay This item sets the LCD screen type There are 8 se lectable types A B C D E F G and H Pist las Font T
119. m when you stop keying BK IN OOo O 00 COO Full break in operation During full break in operation the transceiver auto matically selects transmit while keying and returns to receive immediately after keying is finished BK IN AOGE Bodd CO m 0e8e8 BK IN DELAY KEY SPEED G Push CW to select CW or CW R mode Q Push BK IN several times to turn the semi break in function ON BK IN SEMI appears 3 Rotate BK IN DELAY to set the break in delay time the delay from transmit to receive 7 When using a paddle rotate KEY SPEED to ad Y just the keying speed G Push CW to select CW or CW R mode 2 Push BK IN several times to turn the full break in function ON BK IN FULL appears 7 When using a paddle rotate KEY SPEED to ad Y just the keying speed 66 67 6 FUNCTION FOR TRANSMIT E Transmit filter width setting SSB only The transmit filter width for SSB mode can be se lected from wide middle and narrow 0008 Th amp Se 00600137
120. n screen if necessary 2 Push F 5 SCAN to select the scan screen 3 Push F 5 SET to select the scan set mode screen 4 Push F 2 VW to select the scan resume condition item SCAN SPeed HIGH SCAH Resume OH Rotate the tuning dial to turn the scan resume function ON or OFF e Push F 3 DEF to select the default condition 6 Push EXIT SET to exit the scan set mode 5 Push F 5 T SCAN to start the tone scan SCAN flashes while scanning 6 When the tone frequency is detected the tone scan pauses The tone frequency is set temporarily on a memory channel Program into the memory channel to store the tone frequency permanenily The decoded tone frequency is used for the repeater tone frequency or tone squelch frequency 7 To stop the scan push F 5 T SCAN Push EXIT SET to exit the tone frequency screen 86 Mm 10 ANTENNA TUNER OPERATION 87 E Automatic antenna selection The transceiver covers 0 1 60 MHz over 10 bands Each band key has a band memory which can mem orize a selected antenna ANT1 ANT2 ANT1 RX an tenna and ANT2 RX antenna When you change the operating frequency beyond a band the previously used antenna is automatically selected for the new band This function is convenient when you use 2 or 3 antennas To use the band memory enter set mode and confirm that Auto is selected as the ANT switch item p 100 OTHERS SET FM SP
121. nctions See p 57 for details AF SCAN Repeatedly scans within AF span area Start frequency AF frequency AF frequency This scan operates in both VFO and memory modes SELECT MEMORY SCAN Repeatedly scans all select memory channels Blank channel ar select ar select ar select This scan operates in memory mode e Scan speed Scan speed can be selected from 2 levels high or low in set mode See p 86 for details e Squelch condition PROGRAMMED SCAN MEMORY SCAN The scan continues until it is stopped SEEN manually and does not pause even if it detects signals Scan pauses on each channel when the scan resume is ON not applicable when OFF Scan stops when detecting a signal If you set scan resume ON in set mode the SQUELCH scan pauses for 10 sec when detecting a CLOSED signal then resumes When a signal disap pears while scan is paused scan resumes 2 sec later 82 83 O SCANS E Programmed scan operation Push EXIT SET several times to close a multi function screen if necessary 2 Select VFO mode 3 Select the desired operating mode The operating mode can also be changed while scan ning 4 Push F 5 SCAN to select the scan screen AF SPan Programmed P1 scan edges Pie Set RF SQL open or closed e See previous page for scan condition If the RF SQL control function is set as AUTO the squelch is always open in SSB
122. ndication OFF The clock 2 does not display This item sets the desired off set time period for the clock 2 indication within 24 00 to 24 00 in 5 min steps Pushing F 3 DEF for 1 sec to select the default value This item sets the timer functions ON and OFF When the power ON timer or the power OFF timer is used ON must be selected in this item See p 90 for details FowercOh Timer set This item sets the power on time See p 90 for details This item sets the power off period for automatic shut down after the power on timer has turned power ON See p 90 for details Push F 4 SET to enter the time DH OFF The clock 2 is displayed The clock 2 does not dis below the local tiem play default Rotate tuning dial to set the time DH OFF The timer functions can be The timer functions cannot operated default be operated Push F 4 SET to enter the time BAM Lr Push F 4 SET to enter the time SETMODE 12 E Miscellaneous others set mode Calibration Marker This item is used for a simple frequency check of the transceiver See p 107 for calibration procedure 7 Turn the calibration marker OFF after checking the 7 frequency of the transceiver beeriLonfirmat od A beep sounds each time a switch is pushed to con firm it This function can be turned OFF for silent op eration The volume level can be set in level set mode p 94 beer Bard Edasi A beep
123. nel R4 are played or after 15 sec REC PLAY switch E Digital voice recorder continued e Recording a message for transmit To transmit a message using a voice recorder record the desired message in advance as described below Push EXIT SET several times to close a multi function screen if necessary 2 Push F 2 VOICE to call up the voice recorder screen 3 Push F 2 MIC REC to select the voice memory recording screen 4 Push the desired memory channel switch F 1 T1 F 4 T4 for 1 sec to start recording Speak into the microphone without pushing the PTT switch e Previously recorded contents are cleared 5 Adjust the MIC GAIN control so that the REC LEVEL indicator reads within 100 6 Push the selected memory channel switch F 1 T1 F 4 T4 again to stop recording e Recording is automatically terminated when the total time of recorded messages T1 T4 becomes 90 sec 7 Push EXIT SET twice to exit the voice memory screen e Confirming a message for transmit Push EXIT SET several times to close a multi function screen if necessary 2 Push F 2 VOICE to call up the voice recorder screen 3 Push F 2 MIC REC to select the voice memory recording screen VOICE RECORDER FUNCTIONS 4 Push the desired memory channel switch F 1 T1 F 4 T4 momentarily to start playback and confirmation Push the selected memory channel swit
124. nformation STRAIGHT KEY JACK KEY p 14 Accepts a straight key or external electronic keyer with 1 4 inch standard plug ELEC KEY on the front panel can be used for a straight key or external electronic keyer Deactivate the internal electronic keyer in keyer set mode p 43 7 If you use an external electronic keyer make 4 Sure the voltage retained by the keyer is less 7 than 0 4 V when the key is ON CI V REMOTE CONTROL JACK REMOTE p 109 Connects a PC via the optional CT 17 ci v LEVEL CONVERTER for external control of the transceiver functions Used for transceive operation with another Icom CI V transceiver or receiver EXTERNAL SPEAKER JACK EXT SP pgs 15 114 Accepts an 4 8 Q speaker ALC INPUT JACK ALC p 17 Connects to the ALC output jack of a non Icom lin ear amplifier SEND CONTROL JACK SEND p 17 Goes to ground while transmitting to control exter nal equipment such as a linear amplifier e Max control level 16 V DC 0 5 A DC POWER SOCKET DC 13 8V p 16 Accepts 13 8 V DC through the supplied DC power cable OPC 025D OWE Seal a Rear panel view PANEL DESCRIPTION 1 ANTENNA CONNECTOR 1 ANT1 GROUND TERMINAL GND pgs 13 14 ANTENNA CONNECTOR 2 ANT2 pgs 13 14 Connect this terminal to a ground to prevent electri Accept a 50 Q antenna with a PL 259 connector cal shocks TVI BCI and other problems Y When using an optional AH
125. ning step ON and OFF 1 Hz indications appear in both readouts and the fre quency can be changed in 1 Hz steps When the quick tuning step is ON push for 1 sec to enter the quick tuning step set mode MEMORY CLEAR SWITCH M CL p 80 Clears the selected readout memory channel con tents when pushed for 1 sec in memory mode The channel becomes a blank channel e This switch does not function in VFO mode amp MEMORY WRITE SWITCH MW p 72 Stores the selected readout frequency and operat ing mode into the displayed memory channel when pushed for 1 sec This function is available both in VFO and memory modes MEMORY UP DOWN SWITCHES A V p 76 Push to select the memory channel number for the selected readout e Memory channels can be selected both in VFO and memory modes Select the desired memory channel directly after pushing F INP and a memory channel number MEMO PAD READ SWITCH MP R p 81 Each pushing calls up a frequency and operating mode in a memo pad The 5 or 10 most recently programmed frequencies and operating modes can be recalled starting from the most recent The memo pad capacity can be expanded from 5 to 10 in set mode for your convenience p 101 KEYPAD Pushing a key selects the operating band GENE selects the general coverage band Pushing the same key 2 or 3 times calls up other stacked frequencies in the band p 24 Icom s triple band stacking regist
126. nly for the main readout To op erate the scan during dualwatch scan on the main readout and use the sub readout for your QSO using both dualwatch and split frequency operation 1 Program the desired programmed scan edges in the same amateur band See p 78 for program ming lf you plan to operate a AF scan programming the scan edges may not be necessary 2 Push SPLIT to turn the split frequency function ON an appears i OR TD UFO USB 3 Select VFO mode for the main readout 4 Set the desired operating frequency for the main readout 3 Set another desired frequency using the tuning dial 4 Adjust BAL to set a suitable signal strength bal ance between the main and sub readout frequen cies e S meter shows the combined signal strength 5 To transmit on the sub readout frequency push CHANGE or SPLIT 7 RIT function can be used for the main readout only Y ATX function can be used for the transmit readout TG main readout when the split function is OFF sub 7 readout when the split function is ON Push DUALWATCH for 1 sec The main and sub readout frequencies are equalized and the dualwatch function is turned ON 6 Push F 4 SCAN to select the scan screen Push EXIT SET several times to close a multi func tion screen if necessary 7 Push F 1 PROG or F 2 AF to start the pro grammed scan or AF scan respectively Scan activates on the main readout between the
127. nnnenn 61 E DSP filter Shape rrarrrrnnrrrnnnrrnnnernnnrnvanrnnnnern 62 ME Noise blanker rrrnnrrnnnrnnnennnrnnnnnnnnennnnnnnnnnnnen 62 E Dualwatch operation cccccccseeeseeeeeeeeeeees 63 E Notch UNCION seas Gneis 64 ME Noise reduction rrrnnnnnnnnvnnnnnnnennennennenannnenenne 64 Mi Dial lock function rearernrnnrnnnrnnernnrnnnnevnnennennr 64 6 FUNCTION FOR TRANSMIT 65 71 E VOX function ranrnnannrnnnrennnrennnnennnnrvnnnennnnennn 65 ME Break in function orerronrrrnnrrnnnnernnnrnvanennnnenn 66 E Transmit filter width setting SSB only 67 ME Speech COMpreSSor ccccceeeeeeeeeeeeeeeeeeeees 67 EATA URCO EN 68 E Monitor function 00 0 cece ceeeeceeeeeceeeeseeeeeaeeees 69 M Split frequency operation rrrnrarnnnrrnnnennnner 70 M Quick split function rrrrrrrnnnrrorernrnnnnrnvrnnn 71 7 VOICE RECODER FUNCTIONS 0 72 75 Mi Digital voice recorder cccceeeceeeeeeeeeeeeeeeees 72 8 MEMORY OPERATION rrrnnnnnnnnnnnnnnnvvvvvvrveeeen 76 75 E Memory channels rrrrnnrnnnnnrnnnnrnnnnrnnnnennnnen 76 E Memory channel selection rrrrrnnrrvnnnrrnennn 76 E Memory channel screen rrrrrnnrrrrnnvrennnvrrennn 77 E Memory channel programming 0000 78 E Frequency transferring cccccceeeeeeeeeeeeeees 79 E Memory names rrrnrnrrnnnnrennnnnnnnnrnnnnennnnsnnnnsn 80 ME Memory clearing
128. nnnrrnnnnnrnrnnnrnnnnnnennnn 96 E Timer set mode r rrrnrnnnrvnnnnnrnnnnnennnnnensnnneennnn 97 WE Miscellaneous others set mode 98 13 OPTION INSTALLATION ernnennnnnnnnnnnnnnnnvvvvnneeeenr 104 E Opening the transceiver S case a n 104 W UT 102 VOICE SYNTHESIZER UNIT 0cc00eees 104 14 MAINTENANCE nsssnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn 105 107 ME Troubleshooting ssssssseesssenserserrnsrrerrresrnne 105 E Fuse replacement cccccseceseeeeeeeeeeenes 106 WE Clock backup battery replacement rrrnnrnnnrnnnnnnnnrnnnnnnnnnnnnnnnnnnnnnen 106 Mi Tuning dial brake adjustment 0008 107 E Frequency calibration approximate rrrrrrrrrnnrrrnnrervarrrranrnvnnnnnnn 107 15 INTERNAL VIEWS mrrnnnnnnnnnnnnnnnnonnnnnnnnnnnnnensnrerern 108 16 CONTROL COMMAND nnnnvvvvvvvvevvvnnnnnnnnnnn 109 112 E Remote jack CI V information 109 17 SPECIFICATIONS sciscccscstsccecscisitensisiaossineoncsices 113 TO OP TIONG arna 114 TABLE OF CONTENTS i Ni Ni ms PANEL DESCRIPTION E Front panel 1F 50MHi TRANSC IVER ER TRANSMIT O ICC M TUNER MONIT PR IC 756PROII NR NB jo Ce Ce 2 es J Ce Ges Jp O O O CW RTTY AM FM FILTER EXIT SET MIC AIN RF POWER COMP BK IN DELAY KEY SPEED C EXITISET um ee POWER SWITCH POWER TIMER While trans
129. ntenna more than 7 m 23 ft long 3 5 MHz and above The AH 3 matches the IC 756PROIII to a long wire antenna more than 3 m 10 ft long 3 5 MHz and above or more than 12 m 40 ft long 1 8 MHz and above e See p 19 for the transceiver and AH 4 AH 3 connection e See the AH 4 AH 3 instruction manual for AH 4 AH 3 in stallation and antenna connection details AH 4 AH 3 setting example For mobile operation Optional AH 2b antenna element For outdoor operation G WARNING HIGH VOLTAGE G NEVER touch the antenna element while tuning Yor transmitting NEVER operate the AH 4 AH 3 without an antenna wire The tuner and transceiver will be damaged NEVER operate the AH 4 AH 3 when it is not grounded Transmitting before tuning may damage the trans ceiver Note that the AH 4 AH 3 cannot tune when using a 1 2 A long wire or multiple of the operating fre quency ANTENNA TUNER OF THE IC PW1 When using an external antenna tuner such as the IC PW1 s tuner tune with the external antenna tuner while the internal tuner is turned OFF After tuning is completed turn the internal tuner ON Otherwise both tuners tune simultaneously and correct tuning may not be obtained When connecting the AH 4 AH 3 the antenna connector assignments are ANT 2 for the internal tuner and ANT1 for the AH 4 AH 3 The antenna indicator in the LCD displays ANT1 EXT when the AH 4 AH 3 is connected and se
130. ntents to VFO 1 Select VFO mode with VFO MEMO 2 Select the memory channel to be transferred with A V Memory channel screen is convenient for selecting the desired channel e Memory channel contents appear in the memory chan nel readout below the frequency readout _ appears if the selected memory channel is a blank channel In this case transferring is impossible 3 Push VFO MEMO for 1 sec to transfer the fre quency and operating mode Transferred frequency and operating mode appear on the frequency readout e Transferring in memory mode This is useful for transferring frequency and operat ing mode while operating in memory mode Displayed frequency and mode are transferred e Programmed frequency and mode in the mem ory channel are not transferred and they remain in the memory channel 1 Select the memory channel to be transferred with A V in memory mode And set the frequency or operating mode if required 2 Push VFO MEMO for 1 sec to transfer the fre quency and operating mode Displayed frequency and operating mode are trans ferred to the VFO 3 To return to VFO mode push VFO MEMO mo mentarily Frequency transferring can be performed in either VFO mode or memory mode TRANSFERRING EXAMPLE IN VFO MODE Operating frequency 21 820 MHz USB VFO Contents of M ch 16 14 018 MHz CW TRANSFERRING EXAMPLE IN MEMORY MODE Operating frequency 14 020 MHz CW
131. nto the channel R4 max 15 sec of the voice memory TUNING DIAL p 25 Changes the displayed frequency selects set mode settings etc LOCK SPEECH SWITCH LOCK SPEECH Push momentarily to toggle the dial lock function ON and OFF p 64 Push for 1 sec to announce the S meter indica tion and the selected readout frequency when an optional UT 102 is installed p 104 RIT ATX CONTROL RIT ATX pgs 58 68 Shifts the receive and or transmit frequency without changing the transmit and or receive frequency while the RIT and or ATX functions are ON e Rotate the control clockwise to increase the frequency or rotate the control counterclockwise to decrease the frequency The shift frequency range is 9 999 kHz in 1 Hz steps or 9 99 kHz in 10 Hz steps RIT ATX Low shift lo High shift RIT SWITCH RIT p 58 Turns the RIT function ON and OFF when pushed Use the RIT ATX control to vary the RIT frequency Adds the RIT shift frequency to the operating fre quency when pushed for 1 sec v What is the RIT function The RIT Receiver Incremental Tuning shifts the receive fre quency without shifting the transmit frequency This is useful for fine tuning stations calling you on an off fre quency or when you prefer to listen to slightly different sounding voice characteristics etc EM ATX SWITCH ATX p 68 Turns the ATX function ON and OFF when pushed Use the RIT ATX control to vary th
132. nuation level appear when the attenua tor is set to ON e Noise blanker p 62 Push NB switch to turn the noise blanker ON and OFF e Noise blanker indicator in NB switch lights when the noise blanker is set to ON Push NB for 1 sec to enter the noise blanker level set mode then rotate tuning dial to adjust the threshold level e Twin PBT passband tuning p 62 Rotate TWIN PBT controls inner outer e Push PBT CLR to clear the settings Convenient functions for transmit e Transmit quality monitor p 59 Push MONITOR to turn the monitor function ON and OFF e Monitor indicator in MONI switch lights when the monitor function is set to ON Push EXIT SET for 1 sec then F 1 LEVEL to enter level set mode Select the monitor level item with F 1 F 2 then rotate the tuning dial to adjust the monitor gain RECEIVE AND TRANSMIT 4 1 Push a band key to select the desired band 2 Push AM FM to select AM AM indicator appears After AM mode is selected push AM FM to toggle be tween AM and FM modes 3 Rotate the tuning dial to tune a desired frequency The S meter indicates received signal strength when signal is received 4 Rotate AF to set audio to a comfortable listening level 6 Push TRANSMIT or PTT microphone to trans mit The TX indicator lights red 6 Speak into the microphone at your normal voice level Adjust the microphone gain wit
133. o output balance between main and sub readout frequencies while in dualwatch BAL NR Increases main Increases sub readout gain readout gain 1 PANEL DESCRIPTION E Front panel continued O tJ EE tJ tJ LCD FUNCTION SWITCHES F 1 F 5 Push to select the function indicated in the LCD dis play above these switches e Functions vary depending on the operating condition MODE SWITCHES Selects the desired mode p 29 Announces the selected mode when an optional UT 102 is installed pgs 101 104 Selects USB and LSB mode alternately Selects SSB data mode USB D LSB D when pushed for 1 sec in SSB mode Selects CW and RTTY mode alternately Switches CW and CW R CW reverse mode when pushed for 1 sec in CW mode Switches RTTY and RTTY R RTTY re verse mode when pushed for 1 sec in RTTY mode Selects AM and FM mode alternately Selects AM FM data mode AM D FM D when pushed for 1 sec in AM or FM mode FILTER SWITCH FILTER p 61 Push to select one of 3 IF filter settings gt Push for 1 sec to enter the filter set mode EXIT SET SWITCH EXIT SET Push to exit from a set mode etc Push for 1 sec to enter the set mode screen p 92 REC PLAY SWITCH REC PLAY p 72 Push momentarily to playback the recorded con tents in the channel R4 of the voice memory Push for 1 sec to record the receiving signal con tents i
134. ol can be set as Auto RF gain control in SSB CW and RTTY squelch control in AM and FM or squelch RF SQL control RF gain is fixed at maximum in set mode as fol lows p 98 When setting as RF gain squelch control Noise squelch FM mode SET MODE OPERATION dl Recommended level Can be used in all modes Squelch ee RF SQL Functions as noise squelch or S meter open FI SN default squelch in AM and FM modes S N RF gain meter squelch only in other modes 3 RF gain SQL Operates as a squelch control adjustable S meter RF gain is fixed at maximum sensitivity range squelch Operates as an RF gain control in SSB CW and RT TY modes e Squelch is fixed open e When functioning as RF gain control Operates as a squelch control in AM Squelch is fixed open SSB CW RTTY only and FM modes y RF gain is fixed at maximum sensitivity Maximum RF gain Adjustable range Adjusting RF gain Receive sensitivity Normally RF SQL is set to the 11 o clock position Minimum RF gain p Rotate RF SQL to the 11 o clock position for maxi mum sensitivity When functioning as squelch control Rotating counterclockwise from the maximum position re RF gain is fixed at maximum duces sensitivity The S meter indicates receive sensitivity Noise squelch Noise or nee hreshol inden sae Adjusting squelch Removing non signal noise Rotate RF SQL clockwise when receiving no signal Squelch
135. onnector e ACC 2 connector e CI V connector e Display Transmitter USB LSB CW RTTY AM FM 101 99 regular 2 scan edges SO 239 x 2 and phono RCA 50 Q 10 C to 50 C 14 F to 122 F Less than 0 5 ppm 1 min after power ON 10 to 50 C 14 to 122 F 1 Hz 13 8 V DC 15 negative ground 23A 3 0 A typ 3 5 A typ 340 W x 111 H x285 D mm 13 W x 434 H x 117 2 D in 9 6 kg 21 Ib 3 oz 8 pin DIN connector 7 pin DIN connector 2 conductor 3 5 d mm 1 5 inch diagonal TFT color LCD e Output power continuously adjustable SSB CW RTTY FM AM e Modulation system SSB AM FM e Spurious emission e Carrier Suppression e Unwanted sideband suppression ATX variable range e Microphone connector e ELEC KEY connector e KEY connector SEND connector e ALC connector 113 Less than 5 to 100 W Less than 5 to 40 W PSN modulation Low power modulation Phase modulation 50 dB HF bands 60 dB 50 MHz band 40 dB 55 dB 9 999 kHz 8 pin connector 600 Q 3 conductor 6 35 d mm 3 conductor 6 35 d mm 14 Phono RCA Phono RCA e Receiver e Receive system Intermediate frequencies 1st 2nd 3rd e Sensitivity typical SSB CW RTTY 10 dB S N AM 10 dB S N FM 12 dB SINAD Triple conversion superheterodyne system 64 455 MHz 455 kHz 36 kHz 0 16 uV 1 80 2
136. op Ir A PP PP 2 Rotate the tuning dial to change the frequency in programmed kHz steps 3 Push TS again to turn the quick tuning function OFF Tuning dial W disappears 4 Rotate the tuning dial for normal tuning if desired Selecting kHz step 1 Push TS momentarily to turn the quick tuning step ON Y appears when the quick tuning function ON 2 Push TS for 1 sec to enter the tuning step set ting display e Selected tuning steps for all modes appear Mode selection Tuning dial 3 Select the desired operating mode 4 Rotate the tuning dial to select the desired tuning step from 0 1 1 5 9 10 12 5 20 or 25 kHz e Push F 3 DEF to return to the default setting if de sired Repeat steps Q and to select quick tuning steps for other modes if desired 6 Push EXIT SET to exit the setting display 26 3 BASIC OPERATION Selecting 1 Hz step The minimum tuning step of 1 Hz can be used for fine 1 Push TS to turn OFF the quick tuning step tuning w does not appear 2 Push TS for 1 sec to turn the 1 Hz tuning step TS
137. or turned OFF e Push F 3 DEF to select a default value 9 Select another mode except FM Repeat steps to 8 if desired Push EXIT SET to exit the AGC set mode screen E Twin PBT operation General PBT Passband Tuning function electronically narrows the IF passband width by shifting the IF fre quency to slightly outside of the IF filter passband to reject interference This transceiver uses the DSP cir cuit for the PBT function Moving both TWIN PBT controls to the same position shifts the IF The LCD shows the passband width and shift fre quency graphically Push FILTER for 1 sec to enter the filter set mode Current passband width and shift frequency is dis played in the filter set mode screen gt To set the TWIN PBT controls to the center posi tions push PBT CLR for 1 sec PBT OPERATION EXAMPLE Both controls at center position TWIN PBT IF center frequency Cutting a lower passband TWIN PBT Interference Desired signal FUNCTION FOR RECEIVE 5 The variable range depends on the passband width and mode The edge of the variable range is half of the passband width and PBT is adjustable in 25 or 50 Hz steps These controls function as an IF shift control while in AM mode and when the RTTY filter is turned ON Only the inner control may function in this case IF shift is adjustable in 20 40 Hz steps in RTTY RTTY filter is turned ON or 150 300 500 Hz steps in AM TWIN PB
138. peration in CW mode is optionally available with the IC 756PROIII The RF signal from XVERT is used for the 137 kHz band operation and an external amplifier unit is nec essary See the connection diagram below for reference e Connection diagram for 137 kHz band operation Power amplifier with T R switching unit for 137 kHz 18891 to ACC 2 pin 6 Transverter ON OFF control signal related to the power amplifier unit main power if desired e ON 2 13 8 V DC input more than 10 kQ impedance e OFF Less than 2 V DC RECEIVE AND TRANSMIT 4 E Electronic CW keyer F 1 F 4 The IC 756PROIII has a number of convenient func tions for the electronic keyer that can be accessed a from the memory keyer menu 1 Push EXIT SET several times if necessary 2 Push CW RTTY to select CW mode Push F 3 KEYER then EXIT SET to select memory keyer menu screen 4 Push one of the multi function keys F 1 to F 4 CW RTTY EXIT SET to select the desired menu See the diagram below e Push EXIT SET to return to the previous indication re O p K0000000 e Memory keyer edit scree Cra J Ce2 Ces Fa e Memory keyer send screen KEYVER l EXIT SET e Memory keyer menu screen Merrmal OFF 38
139. power cable and the internal PA unit No sounds come out from Volume level is too low Rotate AF clockwise to obtain a suitable lis the speaker tening level e The squelch is closed e Turn RF SQL to 10 o clock position to open the squelch e The transceiver is in transmitting condition e Push TRANSMIT to receive or check the SEND line of an external unit if desired Sensitivity is too low and The antenna is not connected properly Re connect to the antenna connector only strong signals are au The antenna for another band is selected e Select an antenna suitable for the operating fre dible quency e The antenna is not properly tuned e Push TUNER for 1 sec to manually tune the antenna e The attenuator is activated e Push ATT several times to select ATT OFF Received audio is unclear Wrong operating mode is selected e Select a suitable operating mode or distorted e PBT function is activated e Push PBT CLR for 1 sec to reset the function e Noise blanker is turned ON when receiving a Push NB to turn the noise blanker OFF strong signal e Preamp is activated e Push P AMP once or twice to turn the function OFF e The noise reduction is activated and the NR Set the NR control for maximum readability control is too far clockwise The ANT switch does not The antenna switch has not been activated e Set the antenna switch in set mode to Auto or p 87 f
140. pro grammed scan edges or within the AF span Transmitting on the sub readout stops the scan 2 dk 12 00 WFO ERR iL w q SN Mn P gt D p SPLI T EEE N d T PROGRAM SCAN T s dF SPan Programmed Pi scan edges Pe To cancel the scan push EXIT SET E Notch function This transceiver has auto and manual notch func tions The auto notch function automatically attenu ates more than 3 beat tones tuning signals etc even if they are moving The manual notch can be set to attenuate a frequency via the NOTCH control Push NOTCH to toggle the notch function be tween auto manual and OFF in SSB and AM modes Push NOTCH to turn the manual notch function ON and OFF in CW mode Push NOTCH to turn the auto notch function ON and OFF in FM mode Set to attenuate a frequency for manual notch via the NOTCH control AN appears when auto notch is in use MN appears when manual notch is in use E Noise reduction The noise reduction function reduces noise compo nents and picks out desired signals which are buried in noise The received signals are converted to digital signals and then the desired signals are separated from the noise Push the NR switch to turn the noise reduction ON NR indicator lights 2 Rotate the NR control to adjust the noise reduc tion level 3 Push the NR switch to turn the noise reduction OFF NR indicator lights off
141. r a desired signal and you want to change the interference tone Push CW RTTY once or twice to select CW mode 2 Push CW RTTY for 1 sec to select CW or CW R mode Check the interfering tone The received CW audio pitch and monitored CW audio can be adjusted to suit your preference 300 to 900 Hz in 25 Hz steps without changing the operat ing frequency Rotate CW PITCH to suit your preference e Adjustable within 300 to 900 Hz in 25 Hz steps Y The filter set mode screen graphically displays the 7 CW pitch operations See at left 36 4 RECEIVE AND TRANSMIT CW side tone function When the transceiver is in the receive condition and the break in function is OFF p 66 you can listen to the tone of your CW signal without actually transmit ting Tuning dial X This allows you to match your transmit signal exactly to another station s This also convenient for CW practice ol 0000000 Push EXIT SET for 1 sec then F 1 LEVEL to F 1 F 2 EXIT SET enter level set mode Select an item with F 1 A F 2 V then rotate the tuning dial to adjust the side tone level About 137 kHz band operation Europe UK Italy Spain France versions only 137 kHz band within 135 7 kHz to 137 8 kHz range o
142. ransceiver has a keypad for direct frequency entry as described right Push the desired band key on the keypad 1 3 times 3 different frequencies can be selected on each band with the band key See previous page Using the band stacking register ka Zu dk a LA 12 00 CD UFO FILZ 7 If the dial lock function is activated the lock indica f tor lights and the tuning dial does not function In G this case push LOCK SPEECH to deactivate the 7 lock function Push F INP ENT O appears 2 Input the desired frequency Push GENE to input decimal point between the MHz units and kHz units 3 Push F INP ENT to set the input frequency To cancel the input push MAIN SUB instead of F INPJENT EXAMPLE 14 025 MHz Nr JL4 JC JLo JE IG JE 18 0725 MHz Enp JB JC ID JO JL2 IG JE 706 kHz mM JO 5 100 MHz F INP _5 J _ INC TEN 7 000 MHz 21 280 gt 21 245 FINPJC JC 2 JC JCS JCENT BASIC OPERATION 3 Quick tuning step The operating frequency can be changed in kHz 1 Push TS momentarily to turn the quick tuning steps 0 1 1 5 9 10 12 5 20 or 25 kHz selectable function ON for quick tuning W appears when the quick tuning function ON Quick tuning indicator g EN 12 00 Plea laese s
143. red 6 Speak into the microphone at your normal voice level Adjust the microphone gain with MIC at this step if necessary T Push TRANSMIT or release PTT microphone to return to receive e Notch filter p 64 Push NOTCH switch to turn the auto notch func tion ON and OFF e Rotate NOTCH control to set the attenuating fre quency for manual notch operation e Notch indicator in NOTCH switch lights when the auto notch is set to ON e VOX voice operated transmit p 65 Push VOX to turn the VOX function ON and OFF VOX ON appears when the VOX function is set to ON e Audio tone control p 93 Push EXIT SET for 1 sec then F 1 LEVEL to enter level set mode Select an item with F 1 AJ F 2 VW then rotate the tuning dial to adjust the audio tone E Repeater operation A repeater amplifies received signals and retransmits them at a different frequency When using a repeater the transmit frequency is shifted from the receive fre quency by an offset frequency A repeater can be ac cessed using split frequency operation with the shift frequency set to the repeater s offset frequency 7 For accessing a repeater which requires a repeater Y tone set the repeater tone frequency in set mode G as described below M Set the offset frequencies HF 50 MHz and turn ON the quick split function in set mode others in advance p 69 2 Push VFO MEMO to select VFO mode
144. requency and operating mode last used for that VFO appear EXAMPLE VFO is selected 12 00 12 00 q 1 r q as p Changed frequency 14 123 MHz appears MEMORY MODE pgs 76 80 Each memory channel shows a frequency and oper ating mode like a VFO Even if the frequency or mode is changed the memory channel does not memorize the new frequency or operating mode When the memory channel is selected from another memory channel or VFO mode the memorized fre quency and operating mode appear EXAMPLE Memory channel 1 is selected memorized frequency 14 100 MHz appears instead 22 3 BASIC OPERATION E Selecting VFO memory mode VFO MEMO DN Push VFO MEMO to switch between VFO and memory modes VFO appears when VFO mode or the selected mem ory channel number appears when memory mode is selected beside the frequency readout e Pushing VFO MEMO for 1 sec transfers the contents of the selected memory channel to VFO mode p 79 f OOOOOTD O E Main Sub band selection MAIN SUB Sooo Push MAIN SUB to select access to the main or sub readout The sub readout frequency is displayed in outline or mesh font The sub readout functions only during split oeration or du
145. rsions 100 120 220 240 V European version 230 V 7 Turn OFF the transceiver s antenna tuner while tuning the IC PW1 s tuner CONNECTING A NON ICOM LINEAR AMPLIFIER Transceiver Y A WARNING NE I 7 Set the transceiver output power and linear amplifier 000000 000 7 ALC output level referring to the linear amplifier in Q000 0O 77 struction manual l r ANT ALC The ALC input level must be in the range 0 V to 4 V 77 and the transceiver does not accept positive voltage 50 o Coaxial Non matched ALC and RF power settings could cause To an cable 77 a fire or ruin the linear amplifier antenna The specifications for the SEND relay are 16 V DC ee Y 0 5 A If this level is exceeded a large external relay RF OUTPUT RF ner Y must be used Non Icom linear amplifier INSTALLATION AND CONNECTIONS 2 E External antenna tuner connection CONNECTING THE AH 4 AH 3 77 The AH 4 or AH 3 must be connected to ANT1 Long wire or optional AH 2b Coaxial cable from the AH 4 or AH 3 Control cable HAD U 000000 000 sn A A000 SST Transceiver AH 4 or AH 3 Ground E Transverter jack information When 2 to 13 8 V is applied to pin 6 of ACC 2 the XVERT jack is activated for transverter operation and the antenna connectors do not receive or trans mit any signals p 20 OG Vili While receiving the XVERT jack can be activated as 000000 000 an input
146. s Terminal Node Controller TNC Use SSB or FM mode or Scan converter for operation AFSK output Ground GND AF input Ground GND PTT SQUELCH input ACC 1 socket Rear panel view Connect the SQUELCH line when required AFSK and SSTV connections via microphone connector Terminal Node Controller TNC Use SSB or FM mode or Scan converter for operation AFSK output AF input Ground GND PTT SQUELCH input MIC connector Connect the SQUELCH line when required Front panel view 7 When connected to the MIC connector MIC Y GAIN and AF control adjustment is required INSTALLATION AND CONNECTIONS 2 E Accessory connector information ACC 1 PIN No NAME DESCRIPTION SPECIFICATIONS High level More than 2 4 V 1 RTTY Controls RTTY keying Low level Less than 0 6 V Output current Less than 2 mA 2 GND Connects to ground Connected in parallel with ACC 2 pin 2 Ground level 0 5 V to 0 8 V Input output pin SEND Goes to ground when transmitting Output current dd A A When grounded transmits Input current Tx Less than 200 mA Connected in parallel with ACC 2 pin 3 a 5 4 MOD Modulator input Input impedance 10 kQ O amp Connects to a modulator Input level Approx 100 mV rms gt T ag rd aa Output impedance 4 7 KQO Fixed regardless of AF position l Output level 100 300 mV rms Rear panel view in default settings see notes below
147. scanning E Setting select memory channels Push EXIT SET several times to close a multi function screen if necessary 2 Select memory mode 3 Push F 5 SCAN to select the scan screen 12 00 q 0 i P 14 188 WFO USB dF SPan Programmed P1 scan edges Pie 4 Select the desired memory channel to set as a se lect memory channel 85 6 Push F 3 SELECT to start select memory scan push F 3 SELECT again to return to memory scan if desired Pog ot Mad GEL BIG Le LEIT BE WFO USE gt N ee SELECT MEMORY SCAN Z s N AF SPan 1 kHz Programmed Pil 4 586 S46MHz scan edges P2 29 999 99MHe 7 When the scan detects a signal the scan stops pauses or ignores it depending on the resume set ting and the squelch condition To cancel the scan push F 1 MEMO as select memory channels for select memory Y 2 or more memory channels must be designated f G scan to start 5 Push F 3 SELECT to set the memory channel as a select memory or not alr appears for select memory channels WFO USB q r wpt AF SPan Programmed Pil scan edges Pie 6 Repeat steps to amp to program another memory channel as a select memory channel if desired 7 Push EXIT SET to exit the scan screen Y Select memory channels can also be set in the G memory channel screen p 77 E Scan set mode Scan set mode is used for programming sc
148. screte frequencies and must adhere to the following e USB mode e Maximum of 50 watts ERP Effective Radiated Power 2 8 kHz bandwidth It is the operator s responsibility to set all controls so that the transmission in this band meets the stringent conditions under which we may use these frequencies 7 NOTE We recommend that you store these fre Y quencies mode and filter settings into the memory 7 channel for easy recall The channel center frequencies that are specified by the FCC show the center frequency of their passband However the IC 756PROIII displays carrier point frequency so set 1 5 kHz below from FCC channel center frequency SSN 34 35 4 RECEIVE AND TRANSMIT E Operating CW TRANSMIT TX indicator RX indicator Band keys oo I 0000000 O AF KEY SPEED CW RTTY Tuning dial Convenient functions for receive e Preamp p 57 Push P AMP several times to set the preamp OFF preamp 1 ON or preamp 2 ON P AMP1 or P AMP2 appears when the preamp 1 or preamp 2 is set to ON respectively depending on op erating frequency band e Attenuator p 57 Push ATT several times to set the attenuator in 6 dB steps ATT and attenuation level appear when the attenua tor is set to ON e Noise blank
149. smit and receive frequencies for the quick split function However this setting is used for HF bands in FM mode only and is used to input the repeater offset for an HF band The offset frequency can be set from 4 MHz to 4 MHz in 1 kHz steps Fh SPLIT Otfset S M This item sets the offset difference between transmit and receive frequencies for the quick split function However this setting is used for 50 MHz band FM mode only and is used to input the repeater offset for the 50 MHz band The offset frequency can be set from 4 MHz to 4 MHz in 1 kHz steps SPLIT LOCKE When this item is ON the tuning dial can be used to adjust the transmit frequency while pushing XFC even while the lock function is activated See p 70 for split frequency operation details The internal antenna tuner has an automatic start ca pability which starts tuning if the SWR is higher than 1 5 3 1 When OFF is selected the tuner remains OFF even when the SWR is poor 1 5 3 1 When ON is se lected automatic tune starts even when the tuner is turned OFF Tuner CPTT Start Tuning of the internal antenna tuner can be started automatically at the moment the PTT is pushed after the operating frequency is changed more than 1 from last tuned frequency 1 LEMS Minus 0 1 MHz offset default SAMH Minus 0 5 MHz offset default Op Split lock function ON Cir Automatic tuner start ON Cir Automati
150. sounds when an operating frequency enters or exits an amateur band This functions independent of the confirmation beep setting above The volume level can be set in level set mode p 94 The RF SQL control can be set as the RF squelch control default the squelch control only RF gain is fixed at maximum or Auto RF gain control in SSB CW and RTTY squelch control in AM and FM See pgs 2 30 for details Buick Pua lwatickh When this item is set to ON pushing DUALWATCH for 1 sec sets the sub readout frequency to the main readout frequency and activates dualwatch operation See p 63 for details Mutck SPLIT When this item is set to ON pushing SPLIT for 1 sec sets the sub readout frequency to the main read out frequency and activates split operation See p 71 for details JH OFF Calibration marker OFF default Calibration marker ON OM OFF Confirmation beep ON default Confirmation beep OFF OH OFF Band edge beep ON Band edge beep OFF default RF SQL control as RF squelch control default RF SQL control as squelch control RF SQL control as RF gain control in SSB CW and RTTY squelch control in AM and FM AUTO Cr OFF Quick dualwatch ON Quick dualwatch OFF default OH OFF Quick split ON Quick split OFF default 98 99 12 SET MMODE E Miscellaneous others set mode continued FM SPLIT This item sets the offset difference between tran
151. tate NOTCH control to set the attenuating fre quency for manual notch operation e Notch indicator in NOTCH switch lights when the manual notch is set to ON e AGC auto gain control p 59 Push AGC switch several times to select AGC FAST AGC MID or AGC SLOW Push AGC for 1 sec to enter the AGC set mode Rotate tuning dial to adjust the time constant e 1 4 function p 27 Push 1 4 to turn the 14 function ON and OFF Convenient functions for transmit Break in function p 66 Push BK IN several times to select the break in OFF semi break in and full break in BK IN SEMI or BK IN FULL appears when the semi break in or full break in function is set to ON re spectively About CW reverse mode on oe ogoogo gogo c 3 OCCO8G0 for 1 sec Interference Desired signal CW mode LSB side Interference Desired signal CW R mode USB side About CW pitch control x 28 BD RECEIVE AND TRANSMIT 4 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 nea
152. ted Japan in the United States the United Kingdom Germany France Spain Russia and or other countries PRECAUTIONS A WARNING RF EXPOSURE This device emits Radio Frequency RF energy Extreme caution should be observed when operating this device If you have any questions regarding RF exposure and safety standards please refer to the Federal Communications Commission Office of Engineering and Technology s report on Evaluating Compliance with FCC Guidelines for Human Radio Frequency Electromagnetic Fields OET Bulletin 65 A WARNING HIGH VOLTAGE NEVER at tach an antenna or internal antenna connector during transmission This may result in an electrical shock or burn A WARNING NEVER operate the transceiver with a headset or other audio accessories at high vol ume levels Hearing experts advise against continuous high volume operation If you experience a ringing in your ears reduce the volume or discontinue use A CAUTION NEVER change the internal settings of the transceiver This result in reduced transceiver performance and or damage to the transceiver In particular incorrect settings for transmitter circuits such as output power idling current etc might dam age the expensive final devices The transceiver warranty does not cover any problems caused by unauthorized internal adjustment A NEVER apply AC to the DC13 8V jack on the transceiver rear panel This could cause a fire or ruin the transceiver
153. tep automat ically changes several times as selected There are 2 type of auto tuning steps HIGH Fastest and LOW Faster MIC UP Pouwn SPeed This item sets the rate at which frequencies are scanned when the microphone UP DN switches are pushed and held High or low can be selected This item selects the RIT ATX frequency clearing in struction with the CLEAR switch This item selects the displayed frequency shift func tion from ON and OFF When this function is activated the receiving signal can be kept to receive even when the operating mode is changed between SSB and CW 7 The frequency shifting value may differ according 7 to the CW pitch setting Selects the carrier point of CW mode from LSB and USB HIGH SETMODE 12 Auto tuning step is turned ON Fastest tuning step during rapid rotation default Auto tuning step is turned ON Faster tuning step during rapid rotation HIGH High speed default 50 tuning steps sec OM Clears the RIT ATX fre quency when CLEAR is pushed momentarily OM The displayed frequency shifts when the operating mode is changed between SSB and CW The carrier point is set to LSB side default Auto tuning step is turned OFF LOL Low speed 25 tuning steps sec OFF Clears the RIT ATX fre quency when CLEAR is pushed for 1 sec default OFF The displayed frequency does not shift default ISE The carrier point is set to
154. terminal from an external transverter Q000 OO While transmitting the XVERT jack outputs signals of the displayed frequency at 20 dBm 22 mV as Transverter jack signals for the external transverter E Microphone connector information Front panel view MI cin No FUNCTION DESCRIPTION varies with AF BAL ovr vak O mA Frequency down Ground through 470 Q p 4 37 2 8 V DC output Lo e e GND PTT ground o Squelch open Low level DAG GI Microphone input 7 GND LAIRD Microphone ground Squelch closed High level CAUTION DO NOT short pin 2 to ground as this can damage the internal 8 V regulator NOTE DC voltage is applied to pin 1 for micro phone operation Take care when using a non Icom microphone 3 Frequency up down AR Nort 4 Main readout squelch switch SSN 2 INSTALLATION AND CONNECTIONS E FSK and AFSK SSTV connections To connect a terminal unit TNC or scan converter refer to the diagram below 7 For RTTY operation 7 Narrow filter settings may not pass RTTY signals 7 Be sure to select the appropriate IF filter settings 7 corresponding to the signal width p 61 FSK RTTY connection Use RTTY mode for operation Terminal unit TU or Terminal Node Controller TNC AF input Ground GND PTT SQUELCH input RTTY keying ACC 1 socket Rear panel view Connect the SQUELCH line when required AFSK and SSTV connection
155. transmit voice memory channel T1 T4 appears push F 5 T R to select receive voice memory chan nel 14 188 46 USE 4 Push the desired memory channel switch F 1 R1 F 4 R4 for 1 sec to start recording REC flashes and the recording timer counts up The operating frequency mode and current time are programmed as the memory names automatically e Previously recorded contents are cleared Gam GM i 195 00 USB R2 RS R4 Push the selected memory channel switch F 1 R1 F 4 R4 again to stop recording Recording is automatically terminated after 30 min 7 IMPORTANT Push one of F 1 R1 F 4 R4 to stop record ing before or when 15 sec has passed from the 7 start of recording 7 The voice recorder memory records the 15 sec max of audio before one of F 1 R1 F 7 4 R4 is pushed For example when recording 20 sec of audio 7 the first 5 sec audio will be over recorded with the last 5sec so that the total of audio Y recorded is 15 sec only 6 Push EXIT SET twice to exit the voice memory screen MAAK MQ AA MN Providing a transmission memory is very convenient for repeated CQ and number transmissions at contest times as well as when making consecutive calls in DX pedition e Playing the recorded audio 1 Push EXIT SET several times to close a multi function screen if necessary 2 Push F 2 VOICE to call up the voice recorder scr
156. tting The P AMP 2 is most effective when Used on bands above 24 MHz and when electric fields are weak e Receive sensitivity is insufficient during low gain or while using a narrow band antenna such as small loop a Beverage antenna or a short Yagi antenna etc is used Push ATT several times to set the attenuator 6 dB 12 dB 18 dB or OFF ATT 6dB ATT 12dB ATT 18dB and ATT OFF appears respectively E RIT function The RIT Receive Increment Tuning function com pensates for off frequencies of the communicating station The function shifts the receive frequency up to 9 999 kHz in 1 Hz steps 10 Hz steps when cancelling the 1 Hz step readout without moving the transmit fre quency See on p 5 for function description CLEAR O0D0 O00 S 00000 RIT RIT ATX f When RIT and ATX are ON at the same time the ZY RIT ATX control shifts both the transmit and re Y ceive frequencies from the displayed frequency at 7 the same time e Calculate function The shift frequency of the RIT or ATX function can be added subtracted to the displayed frequency While displaying the RIT and or ATX shift frequency push RIT or ATX for 1 sec FUNCTION FOR RECEIVE 5 G Push RIT to turn the RIT function ON and OFF
157. uency TRANSMIT Ooo amp ogona oge220 GIO E mm Oo OGDOO RF POWER TX indicator Microphone gain adjustment Before transmitting monitor your selected operating frequency to make sure transmitting won t cause in terference to other stations on the same frequency METER CINDY oO Hlo o op 9 0000 5 om ome os os 006080 wad e p O00000S O008 om oe oe oe MIC GAIN BASIC OPERATION 3 Push TRANSMIT or PTT microphone to trans mit The main band s TX indicator lights red When the split operation is activated the sub band s TX indicator lights 2 Push TRANSMIT again or release PTT micro phone to return to receive v Adjusting the transmit output power Rotate RF PWR e Adjustable range 5 W to 100 W AM mode 5 W to 40 W Increases G max 100 W D 40 W for AM Decreases min 5 W 1 Push METER to select the ALC meter 2 Push PTT microphone to transmit Talk into the microphone at your normal voice level 3 While talking into the microphone rotate MIC GAIN so that th
158. unction Manual Transmitting is impossible The operating frequency is not set to a ham Set the frequency to a ham band ull band Output power is too low RF POWER is set too far counterclockwise Rotate RF POWER clockwise e MIC GAIN is set too far counterclockwise e Set MIC GAIN to a suitable position The antenna for another band is selected e Select an antenna suitable for the operating fre quency e The antenna is not properly tuned Push TUNER for 1 sec to manually tune the p 88 antenna No contact possible with RIT or ATX function is activated another station not stop re is open the threshold point Programmed scan does The same frequencies have been programmed Program different frequencies in scan edge p 78 not start in scan edge memory channels P1 and P2 memory channel P1 and P2 Memory scan does not 2 or more memory channels have not been Program more than 2 memory channels start programmed Select memory scan does 2 or more memory channels have not been Designate more than 2 memory channels as se pgs 77 not start designated as select channels lect channels for the scan 85 SCAN TRANSMIT RECEIVE MAINTENANCE 14 PROBLEM POSSIBLE CAUSE SOLUTION REF The displayed frequency The dial lock function is activated does not change properly A set mode screen is selected e The internal CPU has malfunctioned E Fuse replacement
159. ure the transceiver power is OFF before start ing 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 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 transceiver s RF output power to less than the lin ear amplifier s maximum input level otherwise the lin ear amplifier will be damaged The LCD display may have cosmetic imperfections that appear as small or dark spots This is not a mal function or defect but a normal characteristic of LCD displays Use Icom microphones only supplied or optional Other manufacturer s microphones have different pin assignments and connection to the IC 756PROIII may damage the transceiver For U S A only CAUTION Changes or modifications to this device not expressly approved by Icom Inc could void your authority to operate this device under FCC regulations TABLE OF CONTENTS IMPORTANT an i EXPLICIT DEFINITIONS wisisisisssiorsisssiousiniernnnniesvinncaiinins FOREWORD serieen nanen eE EE EEE AE i SUPPLIED ACCESSORIES cecssevcscininsseccetessecissuesesectevans PRECAUTIONS Lasagne ii TABLE OF CONTENTS sssscsdsnsesescsesescicnseienendecasaceantes iii 1 PANEL DESCR
160. ush CW RTTY to select RTTY mode 3 Push F 3 DECODE to turn the RTTY decoder ON e RTTY decoder screen appears eke RTTY Decode TA sekk 5bPs BAUDOT WMark 2125 Shift 176 UnShift On Space suPPort SET OTHERS gt Hew Line Code selectable SET OTHERS gt If RTTY FIL is OFF Please turn OHM Q Setting the decoder threshold level Adjust the RTTY decoder threshold level if some characters are displayed when no signal is received dokk RTTY Decode Monitor rik 45bPs BAUDOT WMark 2125 Shift 176 UnShift On Space suPPort SET OTHERS gt Hew Line Code selectable SET OTHERS If RTTY FIL is OFF Please turn OHM RECEIVE AND TRANSMIT 4 4 If the RTTY filter is turned OFF push RTTY FIL to turn the function ON The RTTY decoder does not function when the RTTY filter is turned OFF 5 Push F 2 HOLD CLR momentarily to freeze the Current screen HOLD appears while the function is in use 6 Push F 5 WIDE to toggle the normal or wide screen space verte UFO 14 195 00 14 100 00 dokk RTTY Decode Monitor 4 45bPs BAUDOT Mark 2125 Shift 1768 UnShift On SPace suPPort G SET OTHERS Hew Line Code selectable SET OTHERS If RTTY FIL is OFF Please turn ON CR CO CO THIS IS JASYUA JASYUA OSAKA JAPAN Co CO CO THIS IS JASYUA JASYUA OSAKA JAPAN Co CR CO THIS IS JASYUA JASYUA OSAKA JAPAN THRESHOLDP mmm 1 3 7 Push F 2 HOLD CLR for 1 sec to clear the dis played characters Push EXIT SET to e
161. voice recorder screen as described at left 2 Push F 3 TX LEV to select the voice memory transmit level set mode screen VU ee Pi Lote CQ JASYUA 3 Push the desired memory channel switch F 1 T1 F 4 T4 momentarily to transmit the contents 4 Rotate the tuning dial to adjust the transmit voice level Push F 5 DEF to select the default condition EN B T2 T3 T4 5 Push EXIT SET to return to the voice recorder screen MEMORY OPERATION Hl E Memory channels The transceiver has 101 memory channels The mem All 101 memory channels are tuneable which means ory mode is very useful for quickly changing to often the programmed frequency can be tuned temporarily used frequencies with the tuning dial etc in memory mode MEMORY MEMORY TRANSFER OVER CHANNEL CHANNEL CAPABILITY TO VEO WRITING CLEAR NUMBER ard memory 400 One frequency and one mode ard in each memory channel Scan edge re 8 frequency and one mode in memory P1 P2 each memory channel as scan Yes Yes No channels edges for programmed scan E Memory channel selection e Using the A or V keys e Using the keypad 1 Push VFO MEMO to select memory mode 1 Push VFO MEMO to select memory mode 2 Push A V several times to select the desired 2 Push F INP memory channel 3 Push the desired memory channel number using e Push and hold A V for continuous selection the keypad UP and DN on the microp
162. xit the RT TY decoder screen 1 Call up the RTTY decoder screen as described at left 2 Push F 4 ADJ to select the threshold level set ting condition 3 Rotate the tuning dial to adjust the RTTY decoder threshold level e Push F 3 DEF to select the default condition 4 Push EXIT SET to exit the RTTY decoder screen 7 The UnShift On Space USOS function and new f line code can be set in the RTTY set mode p 49 46 47 4 RECEIVE AND TRANSMIT RTTY memory transmission Pre set characters can be sent using the RT TY mem ory Contents of the memory are set using the edit OG 2 O BB OG ID F 1 RT1 F 4 RT4 F 1 RT5 F 4 RT8 EXIT SET F 5 1 4 5 8 DE ICOM ICOM ICOM K AASL UR Soo So9 BE SEEL DE ICIM ICOM UR 599 093 BE RTTY tuning meter The transceiver has an RTTY tuning indicator to be tuned correctly and easily The RTTY tuning meter is automatically displayed when the RTTY filter is turned ON 1 Push CW RTTY to select RTTY mode 2 Push RTTY FIL to activate the RTTY filter and RT TY tuning meter G Push EXIT SET several times to close a multi function screen if necessary 2 Push CW RTTY to select RTTY mode 3 Push F 3 DECODE to turn the RTTY decoder ON 4 Push F 3

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