Home

Icom IC-756 User's Manual

1. IC AT500 To the IC 2KLPS Ground rOn OPC 118 sold separately 2 INSTALLATION AND CONNECTIONS E FSK and AFSK SSTV connections To connect a terminal unit TNC or scan converter refer to the diagram below ZY For RTTY operation The optional 250 Hz CW narrow filters may not pass RTTY signals Be sure to select the appropriate IF filters corresponding to the signal width p 28 MM QAR FSK RTTY connection Use RTTY mode for operation Terminal unit TU or Terminal Node Controller TNC AF input Ground GND PTT SQUELCH input ACC 1 socket Rear panel view AFSK and SSTV connections Use SSB or FM mode RTTY keying Connect the SQUELCH line when required Terminal Node Controller TNC or Scan converter for operation AFSK output Ground GND AF input Ground GND PTT ACC 1 socket Rear panel view AFSK and SSTV connections via microphone connector Use SSB or FM mode for operation SQUELCH input Connect the SQUELCH line when required Terminal Node Controller TNC or Scan converter AFSK output AF input Ground GND PTT MIC connector Front panel view X g SQUELCH input Connect the SQUELCH line when required When connected to the MIC connector MIC NY GAIN and AF contr
2. 5 AA OO 209 DE TA A C l ACC SOCKETS p 12 RELAY ALC e Rear panel ANTENNA 1 2 pgs 17 18 Connects a linear amplifier antenna selector etc RX ANTENNA i GY Nhen using the AH 3 it must AH 2b 4 connector p 17 ra gt Used for connecting a EXTERNAL SPEAKER p 68 non Icom linear ampli fier Z Z be connected to the ANT1 SP 20 E Power supply connections Use an optional PS 85 DC POWER SUPPLY etc when operating the transceiver with AC power Refer to the diagrams below INSTALLATION AND CONNECTIONS 2 CAUTION Before connecting the DC power cable check the following important items Make sure e The POWER switch is OFF e Output voltage of the power source is 12 15 V when you use a non lcom power supply DC power cable polarity is correct Red positive terminal Black negative terminal CONNECTING AN ICOM DC POWER SUPPLY AC outlet Transceiver AC cable M U 000000 000 am OL OO to DC power socket CONNECTING A NON ICOM DC POWER SUPPLY AC outlet Non Ilcom power supply Transceiver 13 8 V 20A Black Red to DC power socket Supplied DC power cable AC cable 20 A fuses M Ul 000000 000 sm
3. A straight key can be used when the internal electronic keyer is turned OFF in keyer set mode p 35 e Rear panel ANTENNA 1 2 p 13 DC POWER SUPPLY Example ANT1 for 1 8 18 MHz bands ANT2 for 21 50 MHz bands GROUND p 13 gt 4l J J F S I e amp B gt S O gt A Use the heaviest gauge wire or strap available and make the connection as short as possible Grounding prevents electrical shocks TVI and other problems 2 INSTALLATION AND CONNECTIONS E Advanced connections e Front panel HEADPHONES ek shee eee nee ue MIC The AFSK modulation signal can be input from MIC p 19 REMOTE pgs 20 60 Used for computer control and transceive operation a apa 00
4. Push F 4 SCAN to select the scan screen If the start up screen is not selected if F 5 s function is EXIT push F 5 one or more times to exit 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 pro grammed scan edges or within the AF span Transmitting on the sub readout stops the scan Jz sk G55 2 8k TN EEA USB 2 1250 00 lw 14 100 090 USB USB e 2 1 290 00 ix 14 100 00 USB me 5CAH PROGRAM SCAN dF SPan Programmed Pi Scan edges To cancel the scan push F 5 EXIT 30 4 RECEIVE AND TRANSMIT 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 Following is an example of setting 21 290 MHz for re ceiving and 21 310 MHz for transmitting Set 21 290 MHz USB in VFO mode 9 2 4k G55 2 8k 7 Lent gt 31290 00 ix i4 100 00 USB USB o 14 205 00 ix i4 100 600 USB 2 Push SPLIT momentarily then push CHANGE for 2 sec The quick split function is much more convenient for selecting the transmit frequency See the next section for details Equalized transmit frequency and appear on the LCD 3 appears to show the transm
5. PANEL DESCRIPTION 9 2 4k 55 2 8k T 12 34 14 195 000 lx i4 100 00 USB USB 56 14 205 000 UFO 14 106 090 USB G l 60dB as G o _ ALC R LJ HF 50MHz TRANSCEIVE 1C 75 O E AONITOR NB NR o gt l oe oe CI a AF RF SQL BAL NR CO o 5 As m OD WO 2 N AA 259 Q gt POWER SWITCH POWER TIMER e Push momentarily to turn power ON Turn the optional DC power supply ON in advance e Push momentarily to toggle the timer function ON and OFF p 52 The power switch lights while the timer function is ON e Push for 2 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 When headphones are connected the internal speaker or connected external speaker does not function ELECTRONIC KEYER JACK ELEC KEY p 35 Accepts a paddle to activate the internal electronic keyer for CW operation Selection between the internal electronic keyer bug key and straight key operation can be made in keyer set mode p 35 A straight key jack is separately available on the rear panel See KEY on p 11 Keyer polarity dot and dash can be reversed in keyer set mode p 35 4 channel memor
6. Push M1 M4 one or more times to select the de sired keyer memory channel Input the desired character by pushing the charac ter keys as shown above one or more times or by pushing the band key for number input Push F 1 4 or F 2 for cursor movement 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 underlined memory channel Repeat step until the desired contents are input Push M1 M4 to select next memory channel and repeat step for character input if desired Push F 5 EXIT to exit the memory keyer edit screen e Transmitting memory keyer contents Push CW to select CW mode 2 Push KEYER to select keyer set mode 3 Push F 1 SEND to enter the memory keyer screen PoE m MEMORY KEVER ST_CQ TEST DE JAI RAR UR SNNEEH BK CFM TU QRZ RECEIVE AND TRANSMIT 4 4 Push F 1 M1 F 4 M4 momentarily to transmit the contents one time push these keys for 2 sec to transmit the contents repeatedly M1 M4 are highlighted while transmitting M1 M4 blink while transmitting repeatedly Set the repeat interval of the memory keyer to 1 2 10 or 30 sec See the the previous page for keyer set mode To count down the contact number push COUNT 1 Push F 5 EXIT to exit memory keyer sc
7. TRANSFERRING EXAMPLE IN MEMORY MODE Operating frequency 14 020 MHz CW M ch 16 Contents of M ch 16 14 018 MHz CW E 55 2 8k O 3234 ae 14 020 00 UFO 21 320 060 USB Beep ge Push for 2 sec Beep z k Esk T 19 74 ant 14 020 00 UFO i4 026 060 Cl VFO MEMO Giese GSI D 12834 tro 14 020 00 1i4 615 66 Cl Programmed contents appear 44 45 D MEMORY OPERATION E Memory names All memory channels including scan edges can be tagged with alphanumeric names of up to 10 charac ters each Letters capitals numerals some symbols and spaces can be used e Editing programming memory names If the start up screen is not selected if F 5 s func tion is EXIT push F 5 one or more times to exit 2 Push F 3 MEMORY to select the memory chan nel screen 32 4k G55 28k T 13134 14 195 00 lx i4 100 00 USB UFO 5 oo ix 14 166 66 USB eee 3 Select the desired desired memory channel Push F 4 NAME to edit memory channel name Acursor appears and blinks Memory channel names of blank channels cannot be edited M 92 4 6532 8k 7 ini a USB 14 195 00 ix i4 100 00 USB Character USB keys srg 14 205 00 ix i4 100 00 USB Input the desired character by pushing the charac ter keys as shown above one or more times or by pushing the band key for number input Push F 1 lt or F
8. 14 100 00 UFO 14 168 08 USB Changed frequency 14 123 MHz does not appear and memorized frequency 14 100 MHz appears instead 22 3 FREQUENCY SETTING E Frequency setting with the tuning dial e For ham band use 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 Triple band stacking register below z sk G5s 28k T fiig Ge USB 2 T 200 00 21 625 668 USB 2 Rotate the tuning dial to set the desired frequency Daa CBee LTA 12136 vo 2 1 295 00 21 625 68 USB 3 Select the desired operating mode with the mode switch p 25 X g NOTE If the dial lock function is activated the lock indicator lights and the tuning dial Z does not function In this case push LOCK to deactivate the lock function e For general coverage receiver use Push GENE on the keypad 1 3 times The GENE key calls up a frequency for general cov erage receiver use Qz sk G55 2ek I IERA gt 15 100 00 1 21 025 060 USB Rotate the tuning dial to set the desired frequency For quick tuning use the quick tuning step function p 24 ae atsk T fort i 9 780 00 21 625 00 USB Select the desired operating mode with the mode switch p 25 TRIPLE BAND STACKING REGISTER The triple band stacking register provides 3 memories in one band 3 sets o
9. MEMORY CHANNEL READOUTS p 41 e Show the selected memory channel contents in VFO mode e Show the VFO contents in memory mode FREQUENCY READOUTS p 23 Show the operating frequency Outline characters are used for non accessing readout CLOCK READOUT p 51 Shows the current time TWIN PBT INDICATOR p 25 Graphically displays the passband width for twin PBT operation and center frequency for IF shift op eration QUICK TUNING INDICATOR p 24 Appears when the quick tuning step function is in use 455 kHz IF FILTER INDICATOR p 28 Shows the 455 kHz IF filter selection using pass band width 9 MHz IF FILTER INDICATOR p 28 Shows the 9 MHz IF filter selection using passband width MODE INDICATOR p 25 Shows the selected mode APF FREQUENCY INDICATOR p 27 Appears when the audio peak filter is turned ON and shows the boost frequency width of the audio peak filter E Screen menu arrangement The following screens can be selected from the start up screen Choose the desired screen using the fol lowing chart Pushing F 5 EXIT one or more times returns to the start up screen See p 53 for set mode arrangement eStart up screen Gz 4k 6552 ok ST 1 nee ied USB Don 14 195 000 ix i4 1606 500 USB USB 14 205 000 UFO 14 1606 66 USE SCOPE FILTER amp MEMOR eral eres eee aoe PANEL DESCRIPTION 1 Spectrum scope screen p 37 l2
10. 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 does not light Deep rotation of the NR control results in audio signal masking or distortion Set the NR control for maximum readability The noise reduction func ion is not available in AM and FM modes WQGQ Noise reduction OFF Noise reduction activated BAL NR BAL NR Ee Noise components Desired signal CW 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 Push the NB switch to turn the noise blanker ON or OFF NB NB Noise blanker OFF gt Noise blanker ON NOTE When using the noise blanker received sig nals may be distorted if they are excessively strong MOO NB switch OQ Q Q CI O oO oO 26 4 RECEIVE AND TRANSMIT E APF function The APF Audio Peak Filter changes the receive fre quency response by boosting a particular frequency for better copying of desired CW signals The peak frequency can be adjusted with APF from 300 to 900 Hz manually The boost frequency width can be se lected from 80 160 or 320 Hz Push CW to select CW mode 2 Push the APF switch to turn the audio peak filter ON The
11. Remove the top and bottom covers as shown on the opposite page 2 Turn the transceiver upside down Remove 6 screws from the PLL shielding plate then remove the plate 3 Cut the leads of R56 and L55 in a shielded box on the PLL unit Put the CR 502 in the space available as shown in the diagram then solder its feet into place 6 points Adjust the reference frequency using a frequency counter Return the shield case shield plate and top bottom covers to their original positions CR 502 frequency stability 0 5 ppm 30 C to 60 22 F to 140 F Reference freq check point cable from J81 60 00 MHz 62 mm 10 mMmANTENANCE E Troubleshooting The following chart is designed to help you correct problems which are not equipment malfunctions If you are unable to locate the cause of a problem or solve it through the use of this chart contact your nearest Icom Dealer or Service Center 63 PROBLEM POSSIBLE CAUSE SOLUTION REF x Power does not come on DC power cable is improperly connected e Reconnect the DC power cable correctly p 16 W when the POWER switch Fuse is blown Check for the cause then replace the fuse with p 64 is pushed a spare one Fuses are installed in the DC power cable and the internal PA unit N
12. og USB 14 205 000 UFO 14 100 600 USB 24k 2k T 74 ooog E G 95 000 ODG TVIIN P T a Z eae a 5 3 Crs DD E 7 Ga Ga Gs SA APF AU gt NOTCH Ge 0 C tere N C men Ge APF OW ITCH Alp RIT ATX CLEAR 2 a wK er x Ay EN N wi Cy NS M i N MEMORY UP DOWN SWITCHES A V p 41 e Select the memory channel number for the se lected readout Memory channels can be selected both in VFO and memory modes e Select the desired memory channel directly after pushing F INP and a memory channel number MEMORY WRITE SWITCH MW p 43 Stores the selected readout frequency and operat ing mode into the displayed memory channel when pushed for 2 sec This function is available both in VFO and memory modes MEMORY CLEAR SWITCH M CL p 45 Clears the selected readout memory channel con tents when pushed for 2 sec in memory mode The channel becomes a blank channel This switch does not function in VFO mode QUICK TUNING SWITCH TS p 24 e Turns the quick tuning step ON and OFF While the quick tuning indicator is displayed the fre quency can be changed in programmed kHz steps 1 5 9 and 10 kHz quick tuning s
13. 4 RECEIVE AND TRANSMIT 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 ca pacitors are automatically preset to the memorized point CAUTION NEVER transmit with the tuner ON when no antenna is connected This will damage the transceiver Be careful of the antenna selection BW TUNER OPERATION Push the TUNER switch to turn the internal antenna tuner ON The antenna is tuned automatically when the antenna SWR is higher than 1 5 1 When the tuner is ON the TUNER switch lights Push TUNER 0000000 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 2 sec to start manual tuning A 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 function and turn the tuner OFF This function activates the tuner automatically when the SWR exceeds
14. NOTE When RIT and ATX are ON at the same time the RIT ATX control shifts both Y the transmit and receive frequencies from the displayed frequency at the same time 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 Rotate RIT ATX to find the DX station s receive fre quency When you find the DX station s receive frequency push RIT to turn the RIT function OFF Now you can transmit the DX station s receive fre quency and receive the DX station s transmit fre quency 21 025 MHz Start transmitting while the station is standing by 29 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 Set a desired frequency 2 Push DUALWATCH for 2 sec Equalized receive frequency and appear in the LCD This quick dualwatch function can be turned OFF p 56 Pushing DUALWATCH momentarily activates the du alwatch with the previously operated frequency 3 2 4k G55 2 8k 7 Leni Fo 0 00 ix 14 100 009 USB DUAL s 3 290 00 UFO i4 1606 660 USE RECEIVE AND TRANSMIT 4 Set an
15. Push F 1 MEMORY to start the memory scan Decimal points blink while scanning Qe eak T 13 3 at Jk 14 195 00 inigo ga CSB USB 14 205 00 ix i4 100 00 USB SCAN MEMORY SCAN COMP dF SPan z 16kHz i Programmed Pl 8 500 00 MHz Scan edges P2 29 999 99MHZ MEMORY SELECT f 4FSPAN 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 MEMORY NOTE 2 or more memory channels must be pro Z grammed for memory scan to start WY 49 E Select memory scan operation If the start up screen is not selected if F 5 s func tion is EXIT push F 5 one or more times to exit 2 Select memory mode 3 Select the desired operating mode The operating mode can also be changed while scan ning Push F 4 SCAN to select the scan screen 9 2 4k G55 2 8k T 12134 14 195 00 UFO 14 166 66 USB USB 14 205 00 lx i4 100 00 USB me SCAN AF SPan Programmed P1 Scan edges Pz 5 Set RF SQL open or closed See p 47 for scan condition If the RF SQL control function is set as RF control the squelch always opens See pgs 2 56 for details E Setting select memory channels scans 6 Push F 1 MEMORY to start the memory scan Decimal points blink while scanning Push F 3 SELECT to start select memory scan
16. select amp select This scan operates in memory mode SELECT MEMORY SCAN Repeatedly scans all select memory channels This scan operates in memory mode select amp select select 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 select 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 56 for ON OFF setting and scan resume condition details e Scan speed Scan speed can be selected from 2 levels high or low in set mode See p 56 for details e Squelch condition SCAN STARTS PROGRAMMED MEMORY SCAN WITH The scan continues Scan pauses on SQUELCH until it is stopped each channel when OPEN manually and does the scan resume is not pause even if it ON not applicable detects signals when OFF Scan stops when detecting a signal SQUELCH f you set s
17. 3 not start in scan edge memory channels P1 and P2 memory channels P1 and P2 o Memory scan does not 2 or more memory channels have not been Program 2 or more memory channels p 43 start programmed Select memory scan does 2 or more memory channels have not been Designate 2 or more memory channels as select pgs not start designated as select channels channels for the scan 42 50 MAINTENANCE 10 PROBLEM POSSIBLE CAUSE SOLUTION REF a The displayed frequency The dial lock function is activated e Push LOCK to deactivate the function p 5 a does not change properly A set mode screen is selected e Push F 5 EXIT one or more times to exit the pgs 7 set mode screen 10 53 a e The internal CPU has malfunctioned e Reset the CPU p 21 E Fuse replacement 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 Uy CAUTION Disconnect the DC power cable from Z the transceiver when changing a fuse NY The IC 756 has 2 types of fuses installed for trans ceiver protection e DC power cable fuses cccceseeeeeeeees FGB 20 A Circuitry TUSC iei asa a E aa FGB5A DC POWER CABLE FUSE REPLACEMENT c 20A fuse CIRCUITRY FUSE REPLACEMENT The 13 8 V DC from the DC power cable is applied to all units in the IC 756 except for the power amplifier throu
18. Normal or HORMAL REVERSE reverse keying polarity can be selected When reverse polarity is selected Mark and Space are reversed Normal Key open close Mark Space Reverse _ Key open close Space Mark Normal polarity default Reverse polarity 58 59 8 SET MODE E Miscellaneous others set mode continued 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 OH Spectrum scope displays the transmit waveform default OFF Spectrum scope does not display the transmit waveform When the optional UT 102 VOICE SYNTHESIZER UNIT is installed you can select between English and Japan ese as the language See p 61 for unit installation English English announcement default JaPanese Japanese announcement installed you can select between faster or slower syn thesizer output See p 61 for unit installation HIGH Faster announcement default LOW Slower announcement 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 61 for
19. Push the RIT switch zsk Ezk T F174 14 195 00 1 14 1668 66 USB nT eS RIT appears 2 Rotate the RIT ATX control RIT ATX Low shift if High shift 3 To reset the RIT frequency push CLEAR for 2 sec Jas Ask T IERTA 14 195 00 1 14 100 090 USB Reset to 0 00 T 0 00 To cancel the RIT function push RIT again disappears NY 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 2 sec z k 55 2 8k 12i ag gt 14 195 00 1 i4 100 00 USB 0 25 RIT Push and hold C Jz sk Ek O T 12134 14 195 25 1 i4 100 00 USB 0 00 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 Push the ATX switch Gask 55 2e T RERA 14 195 00 1 14 100 600 USB 325 ATX appears Rotate the RIT ATX control RIT ATX Low shift if High shift To reset the ATX frequency push CLEAR for 2 sec a24 sk T 134 gt 14 195 00 1 i4 100 00 USB Reset to em 0 00 o0 To cancel the ATX function push ATX again disappears
20. Rotate the tuning dial to set the transmit frequency 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 push ing XFC or using dualwatch Ja sk Ask TN 2 34 vro 21 290 00 100 9G SB SPLIT USB 21 310 00 lx i4 100 00 USB PRACTICAL EXAMPLE PRACTICAL EXAMPLE When you are searching for DX stations and you suspect that a DX station may say up X kHz for their receive fre quency OPERATION 1 Push SPLIT for 2 sec to standby for split operation If the DX station says up 10 kHz Push 1 0 then SPLIT Or rotate the tuning dial OPERATION 2 If the DX station says down 5 kHz before you enter standby for split operation e Push F INP 5 then SPLIT The split function is turned ON and 5 kHz down fre quency is entered in the sub readout When you receive a pile up and you want to start split fre quency operation to simplify picking out stations Push SPLIT momentarily and push CHANGE for 2 sec The sub readout frequency is equalized to the main readout frequency and appears Rotate the tuning dial to set your receive frequency in the main readout Announce your receive frequency After you catch one of the calling stations call signs push and hold the PTT switch
21. 1 5 1 The built in antenna tuner matches the transmitter g to the antenna when the SWR is lower than 3 1 NY 34 4 RECEIVE AND TRANSMIT E Electronic CW keyer The transceiver has an electronic keyer Keying speed can be adjusted with KEY SPEED Keying weight the ratio of dot space dash can be set from 1 1 2 8 to 1 1 4 5 in keyer set mode e Setting the electronic keyer Push CW to select CW mode 32 4k G55 28k T mig 14 195 00 lx i4 100 090 USB cu o 14 205 00 lx i4 100 00 USB Some MEMORY KEVERI SEND CONTACT NUMBER 1 gt CW KEYER 3 Push F 4 CW KEY to enter keyer set mode Select the Dot dash ratio item using F 1 or F 2 Rie me Cl KEYER SETTING ime Reneat Paddle etak Keyser tyP Mic uP down keser Rotate the tuning dial to select the keying weight 1 1 2 8 to 1 1 4 5 can be set Check the ratio with side tone in CW mode Push F 3 DEF to select a default ratio of 1 1 3 0 Push F 2 to select the Paddle polarity item Rotate the tuning dial to select the key polarity be tween normal and reverse polarity Push F 2 to select the Keyer type item GC PE mm Cl KEYER SETTING RePeat time Bot dash ratio Paddle eae ever Mic uP down keyer Rotate the tuning dial to set the electronic keyer function to electronic keyer bug key or straight key electronic keyer OFF Bug key se
22. 2 gt for cursor movement Push F 3 DEL to delete the selected character Push F 4 SPACE to input a space Push F 5 EXIT to input the set the name The cursor disappears Repeat steps to to program another memory channel s name if desired Push F 5 EXIT to exit the memory channel screen E Memory clearing Any unnecessary memory channels can be cleared The cleared memory channels become blank chan nels Select memory mode with VFO MEMO 2 Select the desired memory channel with AJ V 3 Push M CL for 2 sec to clear the contents The programmed frequency and operating mode dis appear To clear other memory channels repeat steps and 3 az s GES T F174 24 960 00 UFO 14 195 668 CU Beep M CL ee Push for 2 sec Beep es G55 2 8k T ELETA UFO 14 195 060 CU 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 59 MEMORY OPERATION 5 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 in
23. APF switch lights FFIZ24 etc appears in the LCD 3 Rotate the APF control to adjust the center fre quency of the peak frequency 4 Push APF for 2 sec to select the boost frequency width of the audio peak filter between 80 160 and 320 Hz AFF sa GPE16a or GPFIZ28 indicate the fre quency width 5 Push the APF switch momentarily to cancel the audio peak filter APF switch APF control im a QO O O oO APF indicator GFF 320 Qa sk G55 2 8k T 12134 USB 14 100 00 i4 265 50 USE E CW reverse mode CW R CW Reverse mode receives CW signals with a reverse side CW carrier point like that of LSB and USB modes Use when interfering signals are near a desired signal and you want to change the interference tone e Push CW for 2 sec once or twice to select CW or CW R mode Check the interfering tone e Receive audio tone response 1 3 octave e V2 octave BFO BFO Push for 2 sec TH TNT a PX Desired signal Interference 600 Hz 800 Hz Desired signal Interference 600 Hz 400 Hz CW mode USB side CW R mode LSB side E 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 RTTY signal correctly select
24. E Miscellaneous others set mode continued 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 OH Automatic PTT start ON SET MODE 8 OFF Automatic PTT start OFF default You can set the antenna connector selection to auto matic manual or non selection when using 1 an tenna only When AUTO is selected the antenna switch is acti vated and the band memory memorizes the selected antenna See p 37 for details When MANUAL is selected the antenna switch is activated 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 AUTO Antenna switch is activated and the selection is automatically memorized default MANUAL Antenna switch is activated OFF Antenna switch is deactivated and ANT 1 is always selected This item selects the RTTY mark frequency RTTY mark frequency is toggled between 1275 1615 and 2125 Hz 2125 2125 Hz RTTY mark frequency default 1275 1275 Hz RTTY mark frequency This item adjusts the RTTY shift width There are 3 178 425 selectable values 170 200 and 425 Hz 170 Hz RTTY shift 425 Hz RTTY shift frequency default frequency This item selects the RTTY keying polarity
25. RTTY R RTTY Reverse mode Push RTTY for 2 sec once or twice to select RT TY or RTTY R mode Check the receive signal E CW pitch control The received CW audio pitch and monitored CW audio can be adjusted to suit your preferences 300 to 900 Hz without changing the operating frequency The received CW audio pitch can be adjusted in 3 Hz steps 27 E Filter selection The filter selection switches the IF passband width as shown in the table at right RECEIVE AND TRANSMIT 4 e Optional filter information Passband Used IF Filter ae The filter selection is automatically memorized in each Wath Selectivity mode FL 100 500 Hz 6 dB CW N RTTY N FL 101 250 Hz 6 dB CW N RTTY N i ilter is i i il 9 MHz k z When an optional filter is installed set the optional fil FL 223 1 9kHz 6dB SSB N CWN ter setting in set mode p 55 Optional filters are not RTTY N selected by default FL 232 350Hz 6dB CW N RTTY N l l FL 52A 500 Hz 6 dB CW N RTTY N If the start up screen is not selected if F 5 s func Hea FL 53A 250Hz 6dB CWN RTTY N tion is EXIT push F 5 one or more times to exit z SSB N CW N 2 Push the desired mode switch FL 222 1 8kHz 6dB RTTY N i 3 Push F 2 FILTER to enter the filter selection screen The lines show the selectable combination of IF filters Push F 2 9MHz or F 4 455kHz one or more Y F
26. T Leis 7 088 00 12 7 888 680 LSB e Programming in memory mode Select the desired memory channel with AJ V in memory mode 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 2 sec to program the displayed fre quency and operating mode into the memory channel EXAMPLE Programming 21 280 MHz USB into memory channel 18 Jz sk ESk TN 1er34 LSB i 7 088 00 UFO i4 195 00 USB Dr z k G52 T 13 74 3 502 00 UFO i4 195 00 USB 21 7 Jz sk EAk 7 IERTA USB 8 1 260 00 UFO 14 195 608 USB Beep lt Beep Gesk Aek T 7 i4 0 00 UFO is 195 00 USE Push for 2 sec 43 E Frequency transferring The frequency and operating mode in a memory chan nel can be transferred to the VFO MEMORY OPERATION 5 Frequency transferring can be performed in either VFO mode or memory mode e Transferring in VFO mode This is useful for transferring programmed contents to VFO Select VFO mode with VFO MEMO 2 Select the memory channel to be transferred with A V Memory channel screen is convenient for selecti
27. input log en tries into your computer etc while operating e Using the VOX function Select a phone mode SSB AM FM 2 Push VOX to turn the VOX function ON or OFF e Adjusting the VOX function Select a phone mode SSB AM FM 2 Push VOX to turn VOX function ON 3 Push VOX for 2 sec to enter VOX set mode Select the VOX gain item using F 1 or F 2 While speaking into the microphone rotate the tun ing dial to the point where the transceiver is con tinuously transmitting Adjust the VOX delay for a convenient interval be fore returning to receive Select the VOX delay item using F 1 or F 2 Rotate the tuning dial If the receive audio from the speaker toggles to transmit adjust the anti VOX to the point where it has no effect VOX switch in phone modes Jz k G52ek T ort 14 195 00 ix i4 100 090 USB USE 14 205 00 ix 14 168 66 USB ome OX SETI JOA Dain Hnti UOox VOX delay 33 E Meter function The transceiver has 3 transmit meter functions for your convenience Select the desired meter with the METER switch e Push METER to select RF power Po SWR or ALC for transmit metering METER switch RECEIVE AND TRANSMIT 4 DISPLAY INDICATION MEASUREMENT Po Indicates the relative RF output power in SWR Indicates the SWR over the transmission line Indicates the ALC le
28. on an off frequency or when you prefer to listen to slightly different sounding voice characteristics etc ATX SWITCH ATX p 29 e Turns the ATX function ON and OFF when pushed Use the RIT ATX control to vary the ATX frequency Adds the ATX shift frequency to the operating fre quency when pushed for 2 sec VY What is the ATX function The ATX shifts the transmit frequency without shifting the receive frequency This is useful for simple split frequency operation in CW etc CLEAR SWITCH CLEAR p 29 Clears the RIT ATX shift frequency when pushed for 2 sec CW PITCH CONTROL CW PITCH outer control p 27 Shifts the received CW audio pitch and monitored CW audio pitch without changing the operating fre quency APF 2 CW PITCH Lower frequency ie X Higher frequency Approx 300 Hz Approx 900 Hz AUDIO PEAK FILTER CONTROL APF inner control p 27 Varies the peak frequency of the audio peak filter to pick out a CW signal from interference while the APF function is ON APF CW PITCH Lower frequency Higher frequency Approx 300 Hz Approx 900 Hz AUDIO PEAK FILTER SWITCH APF p 27 e Turns the audio peak filter ON and OFF when pushed The APF indicator appears in the LCD The audio peak filter functions in CW only e Toggles the bandwidth of the audio peak filter be tween 320 160 or 80 Hz when pushed for 2 sec Use the APF control to vary the peak freque
29. p 3 4 Push TRANSMIT to set to the transmit condition Set 3 55 MHz and key down Set 3 80 MHz and key down Push TRANSMIT to return to the receive condition E Optional external tuner operation e AH 3 HF AUTOMATIC ANTENNA TUNER The AH 3 matches the IC 756 to a long wire antenna more than 3 m 10 ft long 8 5 MHz and above or more than 12 m 40 ft long 1 8 MHz and above e See p 18 for the transceiver and AH 3 connection e See the AH 3 instruction manual for AH 3 installation and antenna connection details AH 3 setting example For mobile operation Optional AH 2b antenna element For outdoor operation WARNING HIGH VOLTAGE NEVER touch the antenna element while tuning or YZ transmitting WW NEVER operate the AH 3 without an antenna wire The tuner and transceiver will be damaged NEVER operate the AH 3 when it is ungrounded Transmitting before tuning may damage the trans ceiver Note that the AH 3 cannot tune when using a 12 long wire or multiple of the operating frequency RECEIVE AND TRANSMIT 4 NOTE When connecting the AH 3 the antenna connector assignments are ANT2 for the internal tuner and ANT1 for the AH 3 The antenna indi cator in the LCD displays ANT1 EXT when the AH 3 is connected and selected NOTE The AH 3 can be used for HF bands only It cannot be used for the 50 MHz band RMQQAAMN e AH 3 operation Tuning
30. scan or AF scan as described on previous page 3 Push F 1 PROG or F 2 F to start a scan Decimal points blink while scanning os aask T pad iT x e 14 195 00 ix 14 198 00 SB USB e 14 205 00 lx i4 100 00 USB SCAN PROGRAM SCAN dF SPan Programmed Pit Scan edges P2t 4 Push F 3 FINE to start a fine scan FINE PROGRAM SCAN or FINE AF SCAN ap pears az sk G55 2 8k TN 121a USB o 14 1 95 00 ix 14100 00 CSB USB o 14 205 00 le 14 180 00 PE me SCAN FINE PROGRAM SCAN AF SPan Programmed Pi Scan edges P2i When the scan detects a signal the scan speed decreases but does not stop Push F 1 PROG or F 2 4F to stop the scan push F 3 FINE to cancel the fine scan E Memory scan operation If the start up screen is not selected if F 5 s func tion is EXIT push F 5 one or more times to exit 2 Select memory mode 3 Select the desired operating mode The operating mode can also be changed while scan ning Push F 4 SCAN to select the scan screen 2 4k ow ee USB j 14 195 00 UFO i4 168 00 USE USB o 14 205 00 ix i4 100 00 USB me SCAN Programmed Pit Scan edges P2 Set RF SQL open or closed See p 47 for scan condition If the RF SQL control function is set as RF control the squelch always opens See pgs 2 56 for details
31. sk 2k T 3374 a USB E 14 195 000 ix 14 100 590 USB 14 208 000 UFO i4 1600 660 USB me FILTER SELECTION E 15k E i5k J E 9k EI EE C NONE C NONE 1 Scan screen p 47 SCAM Programmed Pit Scan edges P Set mode screen p 53 me SET MODE LEVEL DISPLAY TIME amp TIMER OTHERS 10 1 PANEL DESCRIPTION E Rear panel QO DYE WWII S C D OLO Q p OC dO 000000 000 Q OF OO 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 3 HF AUTOMATIC ANTENNA TUNER ACCESSORY SOCKET 1 ACC 1 ACCESSORY SOCKET 2 ACC 2 Enable connection to external equipment such as a linear amplifier an automatic antenna selector tuner TNC for data communications etc See the page at right for socket information 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 35 NOTE If you use an external electronic k
32. used for 50 MHz band FM default 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 This item selects a subaudible tone for FM T mode Available subaudible tones Unit Hz operation to access a repeater There are 50 tones f 67 0 88 5 114 8 151 4 177 3 203 5 250 3 available from 67 0 Hz to 254 1 Hz see table at right 693 915 1188 1567 1799 2065 254 1 71 9 94 8 123 0 159 8 183 5 210 7 74 4 97 4 127 3 162 2 186 2 218 1 88 SHz 254 1Hz 77 0 100 0 131 8 165 5 189 9 225 7 88 5 Hz subaudible tone 254 1 Hz subaudible tone 79 7 103 5 136 5 167 9 192 8 229 1 default 82 5 107 2 141 3 171 3 196 6 233 6 85 4 110 9 146 2 173 8 199 5 241 8 OM OFF adjust the transmit frequency while pushing XFC Split lock function ON Split lock function OFF even while the lock function is activated default See p 31 for split frequency operation details The internal antenna tuner has an automatic start ca ON OFF pability which starts tuning if the SWR is higher than Automatic tuner start Automatic tuner start 1 5 3 in the HF bands ON OFF default When OFF is selected the tuner remains OFF even when the SWR is poor 1 5 3 When ON is se lected automatic tune starts even when the tuner is turned OFF 57
33. 1 5 1 This function is turned ON in set mode p 57 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 58 NOTES elf 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 re tune the antenna turn power OFF and ON adjust the antenna cable length This is effective for higher frequencies in some cases 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 Push TUNER to turn the antenna tuner ON Select CW mode Turn OFF the break in function
34. 11 E PA fuse FGB 5 A Bottom view Reference freq check point cable from J81 60 000 MHz RF unit Space for optional high stability crystal unit CR 502 PLL unit tuner FILTER unit Clock backup battery Space for optional 9 MHZ filter Space for optional 455 kHz filter R572 Optional voice synthesizer level adj Space for optional voice synthesizer UT 102 MAIN unit 66 Mmm 12 sPeciFICATIONS 67 E General e Frequency coverage Receive Transmit 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 1 Some frequency bands are not guaranteed 21_830 1 850 3 500 3 800 7 000 7 100 50 200 51 200 Microphone connector 8 pin connector 600 Q e ELEC KEY connector 3 conductor 6 35 d mm 1 4 e KEY connector SEND connector e ALC connector 3 conductor 6 35 d mm 1 4 Phono RCA Phono RCA Mode Number of memory ch
35. 2 to expose the adhesive strip 3 Plug UT 102 into J801 SPEECH UT 102 on the MAIN unit as shown in the diagram at right Adjust R572 to set the speech level if desired Refer to inside views on p 66 Return the top and bottom covers to their original positions 61 E Optional IF filters Several IF filters are available for the IC 756 You can install 2 filters for 9 MHz and 455 kHz IF Choose ap propriate filter s for your operating needs 9 MHz optional filters FL 100 CW NARROW FILTER 500 Hz 6 dB FL 101 CW NARROW FILTER 250 Hz 6 dB FL 223 SSB NARROW FILTER 1 9 kHz 6 dB FL 232 CW NARROW FILTER 350 Hz 6 dB 455 kHz optional filters FL 52A CW NARROW FILTER 500 Hz 6 dB FL 53A CW NARROW FILTER 250 Hz 6 dB FL 222 SSB NARROW FILTER 1 8 kHz 6 dB FL 257 SSB WIDE FILTER 3 3 kHz 6 dB Remove the top and bottom covers as shown on the opposite page 2 Turn the transceiver upside down Install the de sired filter as shown in the diagram at right e The 9 MHz filters can be installed in either direction 3 Replace the top and bottom covers NOTE After filter installation specify the installed g filter using set mode p 55 Otherwise the in stalled filter will not function properly MV OPTION INSTALLATIONS 9 MHz optional filter 9 WE CR 502 HIGH STABILITY CRYSTAL UNIT By installing the CR 502 the total frequency stability of the transceiver will be improved
36. 50 default This item adjusts the contrast of the LCD from 0 to 100 in 1 steps em i 50 50 default This item adjusts the brightness of the LCD from 0 to 100 in 1 steps eed 50 50 default This item adjusts the brightness of the switches from 1 to 8 es Backlight level is 8 Maximum default 54 55 8 SET MODE E Timer set mode This item sets the current time for the built in 24 hour clock See p 51 for details 15 68 Push F 4 SET to enter the time This item sets the power on time See p 51 for details 15 66 Push F 4 SET to enter the time This item sets the power off period for automatic shut down after the power on timer has turned power ON See p 52 for details 6amin Push F 4 SET to enter the time E Miscellaneous others set mode This item is used for a simple frequency check of the transceiver See p 65 for calibration procedure Turn the calibration marker OFF after checking the frequency of the transceiver NY OH Calibration marker ON OFF Calibration marker OFF default When an optional 9 MHz filter is installed this selec tion is necessary otherwise the filter cannot be se lected FL 223 FL 100 FL 232 FL 101 and NONE are se lectable See p 28 for details HOWE FL 223 FL 188 No optional 9 MHz filter is installed def
37. CONNECTIONS 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 756 see UNPACKING on p ii 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 electro magnetic sources OPERATING ANGLE ADJUSTMENT The rubber feet on the bottom of the trans ceiver provide two op erating angles E Grounding To prevent electrical shock television interference TVI broadcast interference BCI and other prob lems ground the transceiver through the GROUND ter minal 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 GROUND terminal and ground as short as possible Y A WARNING NEVER connect the GND terminal to a gas or electric pipe since the connec Y tion could cause an explosion or electric shock OV E Antenna 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 of Voltage Standing Wave Ratio VSWR is recommended for a desired band Of course the transmission line
38. F AUTOMATIC ANTENNA TUNER 500 W automatic antenna tuner Includes an automatic antenna selector for 4 separate antennas SM 8 DESKTOP MICROPHONE Electret condenser type desktop microphone including 2 connection cables for simultane ous connection of 2 transceivers UP and DOWN switches are included HM 36 HAND MICROPHONE Hand microphone equipped with the UP DOWN switches SP 20 EXTERNAL SPEAKER 4 audio filters headphone jack can connect to 2 transceivers Input impedance 8 Q e Max input power 5 W SP 21 EXTERNAL SPEAKER Designed for base station operation e Input impedance 8 Q e Max input power 5 W UT 102 VOICE SYNTHESIZER UNIT Announces operating frequency mode and S meter level CT 16 SATELLITE INTERFACE UNIT Easy tuning when connecting another Icom VHF transceiver for instant satellite commu nications CT 17 Cl V LEVEL CONVERTER For remote transceiver control using a per sonal computer equipped with an RS 232C port You can change frequencies operating mode memory channels etc CR 502 HIGH STABILITY CRYSTAL UNIT Contains a temperature compensating oven heater and crystal unit for improved fre quency stability e Frequency stability 0 5 pom 30 C to 60 C 22 F to 140 F 68 Count on us A 5415H 1EX Printed in Japan Icom Inc Copyright 1996 by Icom Inc 6 9 16 Kamihigashi Hirano ku Osaka 547 Japan
39. H MAIN SUB Selects the main or sub readout for access The sub readout frequency is displayed in outline and functions only during split operation or dualwatch VFO MEMORY SWITCH VFO MEMO e Toggles the selected readout operating mode be tween the VFO mode and memory mode when pushed pgs 22 41 e Transfers the memory contents to VFO when pushed for 2 sec p 44 MAIN SUB CHANGE SWITCH CHANGE e Toggles the frequency and selected memory chan nel between main and sub readouts when pushed Toggles between transmit frequency and receive fre quency when the split frequency function is ON p 31 Equalizes the sub readout frequency to the main readout frequency when pushed for 2 sec DUALWATCH SWITCH DUALWATCH p 30 e Turns the dualwatch function ON and OFF when pushed e Turns the dualwatch function ON and equalizes the sub readout frequency to the main readout when pushed for 2 sec Quick dualwatch function The quick dualwatch function can be turned OFF using set mode p 56 SPLIT SWITCH SPLIT p 31 e Turns the split function ON and OFF when pushed e 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 2 sec in non FM modes Quick split function The offset frequency is shifted from the main readout frequency in FM mode pgs 38 57 e Turns the split function ON and shifts the sub read out fr
40. HEMATIC DIAGRAM MICROPHONE 2k 10u l 4700p PANEL DESCRIPTION 1 PTT SWITCH Push and hold to transmit release to receive PIN NO FUNCTION DESCRIPTION 8 V DC output Max 10 mA Frequency up Ground Frequency down Ground through 470 Q Squelch open LOW level Squelch closed HIGH level CAUTION DO NOT short pin 2 to ground as this Y can damage the internal 8 V regulator NY MICROPHONE CABLE MICROPHONE PLUG MIC I 0334 ELEMENT eae DOWN UP _ S FE PTT l RECEIVE TRANSMIT 1 g 1 PANEL DESCRIPTION mM LCD display USB UFO GPAls26 lesk G52 S ix 14 106 6 UU a 14 195 000 9 o a i 14 205 000 _ e i 14 186 als USE lt TX INDICATOR Indicates the frequency readout for transmit VFO MEMORY CHANNEL INDICATOR pgs 22 41 Indicates the VFO mode or selected memory chan nel number SELECT MEMORY CHANNEL INDICATOR p 50 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 spectrum scope IF filter selection memory channel scan or set modes
41. L 257 information times to select the 9 MHz or 455 kHz IF filter re Y The IC 756 can use the optional FL 257 SSB WIDE spectively on Z FILTER It has 3 3 kHz 6 dB passband width Push F 3 DEF to select a default filter combination for g Te SPee MONE acy J To use the FL 257 select FL 222 and SSB narrow Repeat steps 2 to if desired g inci Z Push F 5 EXIT to exit the filter selection screen Filter construction 9 MHz IF filter FL 23 15 kHz 2nd IF signal FL 80 2 4 kHz 455 kHz IF filter Mixer SFPC455E 15 kHz amp SFPC455G 9 kHz 3rd IF signal FL 96 2 8 kHz FL 223 1 9 kHz FL 100 500 Hz FL 222 1 8 kHz FL 52A 500 Hz FL 232 350 Hz FL 101 250 Hz optional FL 53A 250 Hz optional Filter selection screen 5 00 ix 14 100 00 USB USE 14 208 00 le 14 108 88 USB FILTER SELECTION Selectable combinations 7 E 15k if SSB a a SE Selected filter GE C E NONE J 455 kHz Selected filter 9 MHz C NONE J y 9 MHZ filter Default filter selection selection lt 455 kHz filter selection 28 4 RECEIVE AND TRANSMIT E RIT and ATX e RIT function The RIT function shifts the receive frequency up to 9 999 kHz in 1 Hz steps 10 Hz steps when can celling the 1 Hz step readout without moving the transmit frequency See on p 5 for function description
42. O 010 INSTRUCTION MANUAL HF 50 MHz ALL MODE TRANSCEIVER IC 756 Icom Inc IMPORTANT READ THIS INSTRUCTION MANUAL CAREFULLY before attempting to operate the transceiver SAVE THIS INSTRUCTION MANUAL This in struction manual contains important safety and oper ating instructions for the IC 756 PRECAUTIONS Z WARNING HIGH VOLTAGE NEVER attach an antenna or internal antenna connector during trans mission This may result in an electrical shock or burn Z NEVER apply AC to the DC13 8V socket on the transceiver rear panel This could cause a fire or ruin the transceiver Z NEVER apply more than 16 V DC such as a 24 V battery to the DC13 8V socket on the transceiver rear panel This could cause a fire or ruin the transceiver Z NEVER let metal wire or other objects touch any internal part or connectors on the rear panel of the transceiver This will cause electric shock Z NEVER expose the transceiver to rain snow or any liquids NEVER allow children to play with the transceiver AVOID using or placing the transceiver in areas with temperatures below 10 C 14 F or above 60 C 140 F Be aware that temperatures on a vehicle s dashboard can exceed 80 C 176 F resulting in 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 EXPLICIT DEFINITIONS AVOID placing the tr
43. OFF is selected the ANT switch does not function and ANT 1 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 e 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 the EX 627 HF AUTOMATIC ANTENNA SE LECTOR for more than 3 antennas except for receive antenna When using an external antenna tuner 37 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 NOTE For accessing a repeater which requires a subaudible tone set the subaudible tone frequency Z in set mode Refer to p 57 NANY Set the offset frequencies HF 50 MHz and turn ON the quic
44. OO a The ALC input level must be in the range 0 V to 4 V and the trans NON ICOM LINEAR ceiver does not accept positive AMPLIFIER voltage Non matched ALC and RF power settings could cause a fire or ruin the linear amplifier NOTE The specifications for the SEND relay are 16 V DC 2A If this level is exceeded a large external relay must be used SEND MOV 0n0MMNMMw INSTALLATION AND CONNECTIONS 2 E External antenna selector or antenna tuner connections CONNECTING THE EX 627 Coaxial cable supplied with the EX 627 ia Ld 000000 000 O o Q020 00 00000 Ground CONNECTING THE AH 3 NOTE The AH 3 can be used for the HF bands only although the ANT1 connector is used for both HF and 50 MHz operation Use a coaxial antenna Long wire or optional AH 2b switch when you operate the 50 MHz band with the AH 3 connected Coaxial cable from the AH 3 Control cable ANT1 oa fis f i iii T MAOO fr IC 7 AH 3 Ground CONNECTING THE IC AT500 THROUGH THE IC 2KL ACC cable ge supplied with the IC 2KL Coaxial cable ma supplied with the IC 2KL Coaxial cable supplied with gt the IC AT500 k ACC cable cable supplied with the kz IC AT500 Ea ANTI Transceiver MN ME a
45. QOQO L OO CONNECTING A VEHICLE BATTERY NY Y NEVER connect G to a 24 V battery NOTE Use terminals for the cable connections Crimp ro EF battery P Supplied S DC power cable 2 INSTALLATION AND CONNECTIONS E Linear amplifier connections Use the ANT1 connector when connecting a linear amplifier CONNECTING THE IC 4KL Coaxial cable supplied with the IC 4KL To an antenna ACC cable supplied with the IC 4KL ACC oo O00000 oL Jo 2 IC 4KL Remote controller o oO oC jo i TOM U L laoo 000 E Q000 0O Transceiver CONNECTING THE IC 2KL a 2 CAUTION San antenna Coaxial cable supplied with the IC 2KL Set the transceiver output power for 80 W max with the RF POWER control otherwise a protection cir cuit will activate W T a 000000 000 Q Q000 00 ANININ LL To the IC 2KLPS Ground OPC 118 sold separately CONNECTING A NON ICOM POWER AMPLIFIER Toan 50 Q coaxial cable A WARNING antenna Set the transceiver output power ANTI and linear amplifier ALC output Transceiver level referring to the linear ampli RF OUTPUT RF INPUT Oo E in il fier instruction manual 000000 000 Q Q000
46. ST for tuning and se lect MID or SLOW depending on the receiving condi tion e Turns the VOX function ON and OFF when pushed in non CW modes p 33 Enters the VOX set mode when pushed for 2 sec in non CW modes p 33 ae Selects semi break in full break in opera tion or turns the break in operation OFF when pushed in CW mode VY What is the VOX function The VOX function voice operated transmission starts transmission without pushing the transmit switch or PTT switch when you speak into the microphone then auto matically returns to receive when you stop speaking Y What is the break in function The break in function toggles transmit and receive with CW keying Full break in QSK can monitor the receive signal during keying e Turns the speech compressor ON and OFF in SSB and AM modes p 34 e Enters memory keyer set mode in CW mode pgs 35 36 Turns the 1 4 function ON and OFF in RTTY mode p 24 1 4 function sets dial rotation to 1 4 of normal for fine tuning 174 OFF Vv 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 effec tive for long distance communication or when propaga tion conditions are poor ELECTRONIC CW KEYER SPEED CONTROL KEY SPEED p 35 Adjusts the internal electronic CW keyer s speed 7
47. Sub readout selection D1 T NE E Eooo NEg ke og 8 8 33 Q Ea 5 Memory mode selection 08 Memory channel selection Mch no BCD Memory write 09 _ IC 756 TO CONTROLLER Memory transfer to VFO 0A Memory clear 0B _ FE FE EO 50 Cn Sc Data area e g fd FD Scan stop 00 LA t 5 t Start programmed memory scan 01 T T D 2 Start programmed scan 02 g a Oo HE 2 Start AF scan 0E 03 QE 8 a D Start fine programmed scan 12 BEBE d D 2 Start fine AF scan 13 9 F Geg 5 ha 2 Start memory scan 22 b 5 o g 2 2 Start select memory scan 23 a YO g e pesg 8 3 5 Split OFF E 00 ENE g Q E Split ON 01 X O a oOo 20 0 m L TS OFF 10 or 1 Hz step 00 TS ON 1 kHz step 01 OK or NG MESSAGE TO CONTROLLER TS ON 5 kHz step 10 02 TS ON 9 kHz step 03 FE FE Eo 50 FB FA FD SION Oikbia step 04 ANT 1 selection 00 or 0000 an is d ANT2 selection 12 01 or 0100 pa o 2 pel ANT1 RX selection 0001 g se cs ANT2 RX selection 0101 o 8835 9 B S 5 Me 8 1 Frequency data arrangement BCD code 9 eg ee 8 10 Hz 1 Hz 1 kHz 100 Hz 100 kHz 10 kHz 5 2 na 2 a 10 MHz 1 MHz 1 GHz then 100 MHz E 8888 5 D Sre xo g 2 Scan edge channel P1 0100 P2 0101 o Q9 OZ u 21 3 FREQUENCY SETTING E When first applying power CPU resetting Before first applying power make sure all connections required for your system are complete by referring to chapter 2 Then reset the transceiver us
48. 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 Input output pin Ground level 0 5Vto0 8V 3 SEND Goes to ground when transmitting Output current Less than 20 mA When grounded transmits Input current Tx Less than 200 mA 5 Connected in parallel with ACC 2 pin 3 Z g Modulator input Input impedance 10 kQ Boe 4 MOD Connects to a modulator Input level Approx 100 mV rms 5 AF AF detector output Output impedance 4 7 KQ R Fixed regardless of AF position Output level 100 to 300 mV rms ear panel VIER Squelch output Squelch open Less than 0 3 V 5 mA 6 SQLS Goes to ground when squelch Squelch closed More than 6 0 V 100 A opens Output current Max 1 A 13 8 V 13 8 V output when power is ON Connected in parallel with ACC 2 pin 7 Control voltage 4 to 0 V 8 ALC ALC voltage input Input impedance More than 10 kQ Connected in parallel with ACC 2 pin 5 ACC 2 PIN NO PIN NAME DESCRIPTION SPECIFICATIONS Output voltage 8 V 40 3 V 1 P Negu aiea EV outpUN Output current Less than 10 mA 2 GND Same as ACC 1 pin 2 QIE 3 SEND Same as ACC 1 pin 3 IF Amd voee ipa and voltage output 4 BAND Varies with amateur band Output voltage 0 to 8 0 V Rear panel 5 ALC Same as ACC 1 pin 8 ee 6 NC No connection 7 13 8 V Same as ACC 1 pin 7 2 INSTALLATION AND
49. anel u un 11 E Dualwatch operation ccccce 30 Eri ERE EN ERRE E Split frequency operation 2 INSTALLATION AND E Quick split function oe 8 aired ietvie i evdvnevacuntesis pate E Monitor function s es 33 et MOdE AESCTIPLION sees Una cn n EO on 33 E Levelset mode E Selecting a location ceeeeeee 13 E Meter fUNCHON sss 34 m Display setmode E Grounding E Speech compressor ccscece 34 E Timer set mode tea E SWR reading oisein 34 E Miscellaneous others set mode 55 E Required connections E Electronic CW keyer nsss 35 E Advanced connections E Memory keyer nsnsi 36 9 OPTION INSTALLATIONS 61 62 E Power supply connections 16 E Spectrum scope screen 37 E Opening the transceiver s case 61 E Linear amplifier connections 17 a Banana mony i E UT 102 VOICE SYNTHESIZER E External antenna selector or for automatic antenna selection 37 UNIT aean antenna tuner connections 18 E Repeater operation E Optional IF filters E FSK and AFSK SSTV E Dial lock function preats E CR 502 HIGH STABILITY CONNECHONS ssesesessssssssessssssseeees 19 E Antenna tuner operation CRYSTAL UNIT scosiencwniceaaeiviitis 62 E Remote jack CI V information 20 E Optional external tuner operation 40 10 MAINTENANCE 63 65 3 FREQUENCY SETTING 21 24 5 MEMORY OPERATION 41 46 E Troubleshooting E When first applying po
50. annels e Antenna connector Usable temperature range Frequency stability e Frequency resolution 13 8 V 15 negative ground Power supply requirement e Current consumption for France version USB LSB CW RTTY AM FM 101 99 regular 2 scan edges PL 239x2 and phono RCA 50 Q 10 C to 60 C 14 F to 140 F Less than 200 Hz from 1 min to 60 min after power ON After that rate of stability less than 30 Hz hr at 25 C 77 F Temperature fluctua tions 0 C to 50 C 32 F to 122 F less than 350 Hz 1 Hz Transmit max power 20A Receive standby 2 5A max audio 2 7A e Dimensions e Weight e CI V connector E Transmitter 340 W x 111 H x285 D mm 133 Ww x4 3 H x 11 7 2 D in 10 5 kg 23 Ib 2 oz 2 conductor 3 5 d mm 1 e Output power continuously adjustable SSB CW RTTY FM AM e Modulation system SSB AM FM e Spurious emissions e Carrier suppression e Unwanted sideband suppression e ATX variable range 2 100 W 1 40 W PSN modulation Variable reactance modulation 50 dB HF bands 60 dB 50 MHz band 40 dB 55 dB 9 999 kHz E Receiver e Intermediate frequencies SSB CW RTTY AM FM 1st 69 0115 MHz 69 0106 MHz 69 0100 MHz 69 0115 MHz 2nd 9 0115 MHz 9 0106 MHz 9 0100 MHz 9 0115 MHz 3rd 455 kHz 455 kHz 455 kHz 455 kHz Ath 15 625 kHz 15 625 kHz 15 625
51. ansceiver against walls or putting anything on top of the transceiver This will obstruct heat dissipation During mobile operation DO NOT operate the trans ceiver without running the vehicle s engine When transceiver power is ON and your vehicle s engine is OFF the vehicle s battery will soon become exhausted Make sure the transceiver power is OFF before starting the vehicle This will avoid possible damage to the transceiver by ignition voltage spikes During maritime mobile operation keep the transceiver and microphone as far away as possible from the mag netic navigation compass to prevent erroneous indica tions BE CAREFUL The heatsink will become hot when op erating the transceiver continuously for long periods BE CAREFUL If a linear amplifier is connected set the transceivers RF output power to less than the lin ear amplifiers maximum input level otherwise the lin ear amplifier will be damaged Use Icom microphones only supplied or optional Other manufacturer s microphones have different pin assignments and connection to the IC 756 may dam age the transceiver WORD DEFINITION WARNING Personal injury fire hazard or electric shock may occur CAUTION Equipment damage may occur If disregarded inconvenience only NOTE No risk of personal injury fire or elec tric shock The explicit definitions described at left apply to this in struction manual The IC 756 compl
52. ault FL 223 optional filter is installed FL 100 optional filter is installed When an optional 455 kHz filter is installed this se lection is necessary otherwise the filter cannot be se lected FL 222 FL 52A FL 53A and NONE are selectable See p 28 for details HOWE FL 222 FL S24A No optional 455 kHz filter is installed default FL 222 optional filter is installed FL 52A optional filter is installed E Miscellaneous others set mode continued 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 54 OH Confirmation beep ON default SET MODE 8 OFF Confirmation beep OFF 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 54 OH Band edge beep ON default OFF Band edge beep OFF The transceiver has 2 speeds for scanning high and HIGH LOW low High speed default Low speed See p 47 for scanning details This item sets the scan resume function ON or OFF ON OFF ON scan resumes 10 sec after stopping on a signal or 2 sec after a signal disappears OFF scan does not resume after stopping on a signal See p 47 for scanning details Scan resume ON default Scan resume OFF The RF SQL contr
53. automatically changes those of connected transceivers or re ceivers and vice versa OFF OH ceive operation you must change the operating fre quency data length to 4 bytes e This item must be set to ON only when operating trans ceiver with the IC 735 5 bytes of frequency data default 4 bytes of frequency data 60 Mm O OPTION INSTALLATIONS E Opening the transceiver s case Follow the case and cover opening procedures shown here when you want to install an optional unit or adjust the internal units etc CAUTION DISCONNECT the DC power cable from the transceiver before performing any work on the transceiver Otherwise there is danger of elec tric shock and or equipment damage MAA A Remove 2 screws from the left side of the trans ceiver to remove the carrying handle as shown below 2 Remove 7 screws from the top of the transceiver and 4 screws from the sides then lift up the top cover 3 Turn the transceiver upside down 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 59 in a clear electronically generated voice in English or Japanese Remove the top and bottom covers as shown above 2 Remove the protective paper attached to the bot tom of the UT 10
54. can resume ON in set mode the CLOSED SC2 pauses for 10 sec when detecting a signal then resumes When a signal disap pears while scan is paused scan resumes 2 sec later E Programmed scan operation If the start up screen is not selected if F 5 s func tion is EXIT push F 5 one or more times to exit 2 Select VFO mode 3 Select the desired operating mode The operating mode can also be changed while scan ning Push F 4 SCAN to select the scan screen Fz sk Ek TN ELETA 14 195 00 lx i4 100 00 USB USB 14 205 00 lx i4 100 00 USB me SCAN Programmed P1 Scan edges Pz Set RF SQL open or closed See previous page for scan condition If the RF SQL control function is set as RF control the squelch always opens See pgs 2 56 for details scans 6 Push F 1 PROG to start the programmed scan Decimal points blink while scanning 2 2 4k G55 2 8k TN 12 34 USB e 14 195 00 ix i400 00 GSB USB e 14 205 00 ix 14 100 00 USB Programmed Pi n edges 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 NOTE If the same frequencies are programmed into the scan edge memory channel P1 and P2 Z programmed scan does not start GK E AF scan operation If the start up screen is not sele
55. cted if F 5 s func tion is EXIT push F 5 one or more times to exit 2 Select VFO mode or a memory channel 3 Select the desired operating mode The operating mode can also be changed while scan ning Push F 4 SCAN to select the scan screen Gack GAs T 12 34 14 195 00 lx i4 100 00 USB USB o 14 205 00 ie i4 100 00 USB PE m scan dF SPan Programmed Pi Scan edges Set RF SQL open or closed See previous page for scan condition If the RF SQL control function is set as RF control the squelch always opens See pgs 2 56 for details Set the AF span by pushing F 4 AF SPAN Set center frequency of the AF span Push F 2 AF to start the AF scan Decimal points blink while scanning 24k 652e T 9134 14 195 00 te 14 168 BB USB o 14 205 00 n ix 14 1500 00 USB L SCAN AF SPan Programmed Pi Scan edges P2 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 48 6 SCANS E Fine programmed scan fine AF scan Fine scan functions as programmed or AF scan but scan speed decreases when the squelch opens and does not stop The scanning tuning step shifts from 50 Hz to 10 Hz while the squelch opens Select the scan screen from the start up screen by pushing F 4 SCAN 2 Set for programmed
56. d You should not calibrate frequencies ex cept for special reasons WQS Push SSB to select USB mode Make sure the TWIN PBT controls are set to the center position and RIT ATX function is not activated 2 Set the frequency to the standard frequency sta tion minus 1 kHz 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 32 4k G55 28k T 1ar34 gt 9999 00 ix 14 100 00 USB 3 If the start up screen is not selected if F 5 s func tion is EXIT push F 5 one or more times to exit Push F 5 SET to select the set mode screen 5 Push F 4 OTHERS to enter miscellaneous oth ers set mode Push F 1 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 mm OTHERS SET Calibration marker 1 er Filter 455kHz Beer ume F4S5Q0L control wick dualwatch 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 Rotate the tuning dial counterclockwise to turn the calibration marker OFF Push F 5 EXIT twice to exit set mode e Top view PA unit INTERNAL views
57. equency after inputting an offset 1 MHz in 1 kHz steps 1 PANEL DESCRIPTION O E D ji 7 S TWIN 7512 8k Pia p SF IT 1 8 O 3 5 2 z B F x N USB Se eae c a aG Gaa aa 14 35 000 EZE k a he pj 2eG Goce e USB 14 05 000 FN UFO 14 106 600 USB COMP KEY SPEED BK IN DELAY LOCK SWITCH LOCK p 38 Turns the dial lock function ON and OFF RIT ATX CONTROL RIT ATX p 29 Shifts the receive and or transmit frequency without changing the transmit and or receive frequency while the RIT and or ATX functions are ON 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 High shift RIT SWITCH RIT p 29 e Turns the RIT function ON and OFF when pushed Use the RIT ATX control to vary the RIT frequency e Adds the RIT shift frequency to the operating fre quency when pushed for 2 sec What is the RIT function The RIT Receiver Incremental Tuning shifts the receive frequency without shifting the transmit frequency This is useful for fine tuning stations calling you
58. es Turn power ON then check the display If any of the following indicators appear turn them OFF as follows e Quick tuning step indicator w Push TS 1 Hz frequency readout Push TS for 2 sec while quick tuning step is OFF e RIT indicator j Push RIT ATX indicator f Push ATX e Split indicator Push SPLIT e Dualwatch indicator Push DUAL WATCH APF indicator Frizza etc Push APF FREQUENCY SETTING 3 E VFO description VFO is an abbreviation of Variable Frequency Oscilla MODE tor and traditionally refers to an oscillator Select SWITCHES The transceiver s VFO is somewhat different The VFO of the IC 756 acts like a computer s window and can show one frequency and one operating mode Gaa 2k N a USB ee 14 100 00 14 265 86 USB You can call up a desired frequency to the VFO with the keypad memo pad read switch see p 46 or the Change memory transfer function see p 44 You can also change the frequency with the tuning dial and select the operating mode with the mode switches Transfer Transfer MEMO PAD 28 025 MHz KEYPAD MEMORY CHANNEL 7 001 MHz BAND KEY 21 295 MHz During dualwatch or split frequency operation the sub VFO is functional non outline larger frequency char acters While pushing XFC during split frequency op eration you can change the transmit readout fre quency with the keypad me
59. eyer make sure the voltage retained by the keyer is less than 0 4 V when the key is ON WW O CI V REMOTE CONTROL JACK REMOTE p 20 Designed for use with a personal computer for re mote control of transceiver functions Used for transceive operation with another Icom CI V transceiver or receiver EXTERNAL SPEAKER JACK EXT SP pgs 15 68 Accepts an 4 8 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 external equipment such as a linear amplifier Max control level 16 V DC 2 A DC POWER SOCKET DC 13 8V p 14 Accepts 13 8 V DC through the supplied DC power cable OPC 025A Rear panel Oud ane e f al ANTENNA CONNECTOR 1 ANT1 ANTENNA CONNECTOR 2 ANT2 pgs 13 14 Accept a 50 Q antenna with a PL 259 connector PANEL DESCRIPTION 1 GROUND TERMINAL GND pgs 13 14 Connect this terminal to a ground to prevent electri cal shocks TVI BCI and other problems Y NOTE When using an optional AH 3 HF AUTOMATIC g ANTENNA TUNER connect it to the ANT1 connector g The internal antenna tuner activates for ANT2 and Y deactivates for ANT1 when connecting the AH 3 ACC SOCKETS ACC 1 PIN NO PIN NAME DESCRIPTION SPECIFICATIONS HIGH level More than 2 4
60. f a frequency and mode on each band are automatically stored when used If a band key is pushed once the last used frequency and mode are called up When the key is pushed again another stored frequency and mode are called up This function is convenient when you operate 3 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 RTTY frequency EXAMPLE 21 MHz band Push 14 MHz band Push 14 025 00 21 025 00 21 295 00 14 195 00 RTTY RTTY 14 090 00 21 090 00 E Direct frequency entry with the keypad The transceiver has a keypad for direct frequency entry as described below Push F INP a appears 2 Input the desired frequency Input decimal point between the MHz units and kHz units 3 Push F INP ENT to enter the input frequency To cancel the input push MAIN SUB instead of F INPPENT EXAMPLE 14 025 MHz En JCC ee NS as 18 0725 MHz Em JC IC I I sD 706 kHz Caine C7 Co JC6 JEN 5 100 MHz CinPJCS JC C4 CENT 7 000 MHz 21 280 gt 21 245 ENAC JC2 JC4 DCS JT 23 E Advanced tuning functions QUICK TUNING STEP The operating frequency can be changed in kHz steps 1 5 9 or 10 kHz selectable for quick tuning Push TS momentarily to display the quick tuning indicator Quic
61. g band conditions in an instant If the start up screen is not selected if F 5 s func tion is EXIT push F 5 one or more times to exit 2 Push F 1 SCOPE to select the scope screen i2 4k G28 T tity USB e 14 195 00 ix i4 100 00 USB 3 Push F 1 SPAN one or more times to select the scope span 4 Push F 2 MARKER to select the marker or turn the marker OFF SUB MARK displays the marker at the sub readout fre quency TX MARK displays the marker at the transmit fre quency azk sk T 134 USE 14 195 00 ix i4 100 00 USB SPLIT USE o 14 207 00 ix i4 100 090 USB Appears when the Sub readout Appears when the marker is out of range or TX marker marker is out of range Push F 3 MAX H to hold peak levels or not Push F 4 HOLD to freeze the current spectrum waveform Push F 5 EXIT to exit the scope screen E Band memory for 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 antenna 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 58 When
62. g dial Push F 3 DEF to select a default condition or value For timer set mode push F 4 SET to enter the set time Push F 5 EXIT twice to exit the set mode N w Oo m D m O m m 0 gt ez eStart up screen oo ee Level set mode p 54 e 14 195 00 ix 14 100 600 USB me LEVEL CTrebles USB 14 205 00 lx 14 100 090 USB FILTER MEMORY Set mode screen Ge GE T 17234 USB O14 195 00 ix 14 100 66 USB o 14 205 00 ix 14 100 600 USB me SET MODE LEVEL DISPLAY TIME amp TIMER OTHERS 53 E Level set mode This item adjusts the bass level of the transmit audio tone in SSB AM mode from 12 dB to 12 dB in 2 dB steps SET MODE 8 ie _ AdB 0 dB default tone in SSB AM mode from 12 dB to 12 dB in 2 dB steps M dB 0 dB default This item adjusts the CW side tone and transmit IF signal monitor level from 0 to 100 in 1 steps See p 33 for details eed 50 50 default This item adjusts the volume level for confirmation beep tones from 0 to 100 in 1 steps E Display set mode NOTE To adjust the LCD contrast or backlight wait until the LCD becomes stable 10 min or more after turning power ON This is an inherent characteristic of LCDs and LCD backlights and does not indicate a transceiver malfunction ANNL LLY mm i 507
63. gh the circuitry fuse This fuse is installed in the PA unit Remove the top cover as shown on p 61 2 Remove 11 screws from the PA shielding plate then remove the plate 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 on the inside of the front panel for clock and timer functions The usual life of the backup battery is approximately 5 years When the backup battery is exhausted the trans ceiver transmits and receives normally but cannot re tain the current time 64 65 10 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 sta tion WWV or other standard frequency signals CAUTION Your transceiver has been thoroughly adjusted and checked at the factory before being shippe
64. ies with the essential requirements of the 89 336 EEC directive for Electromagnetic Compati bility This compliance is based on conformity with the ETSI specification prETS300 684 EMC product stan dard for Commercially Available Amateur Radio Equip ment CE TABLE OF CONTENTS IMPORTANT cs eccceseeeessseeeeeeeees i 4 RECEIVE AND TRANSMIT 25 40 E AF scan operation eee 48 PRECAUTIONS a M Mode selection o 25 E Fine programmed scan EXPLICIT DEFINITIONS vi E Twin PBT operation 0 25 fine AF SCAN oe eee eee eeeeeee eee 49 TABLE OF CONTENTS nassen ii E Auto notch function E Memory scan operation 49 UNPACKING ccccoccccecccceccececcececcececceree ii M Noise reduction cccccceceeee E Select memory scan operation 50 M Noise blanker seee E Setting select memory channels 50 E APF function 1 PANEL DESCRIPTION 1 12 E CW reverse mode 7 CLOCK AND TIMERS 51 52 E Front panel AATAL LTIS 1 E RTTY reverse mode cccccccceseeees 27 E Setting the current time 54 E Microphone HM 36 8 E CW pitch control 27 ae peak Mey py TO D display coccccccccccccccccccccececececeeeeee 9 E Setting power on time 51 aR Ba TAD A seertareemnateetiae 29 E Setting power off period 52 E Screen menu arrangement 10 BERIT AND ATX O 29 ee ines ORON f5 W Rear p
65. ifts the IF The LCD shows the passband width graphically Variable range depends on the filter selection 1 29 kHz in 15 Hz steps and 258 kHz in 3 Hz steps are available AILL LL BLB Ll e TWIN PBT should normally be set to the center positions when there is no interference eWhen PBT is used the audio tone may be changed ePBT may not function with some IF filter combina tions e Not available for FM mode PBT OPERATION EXAMPLE Both controls at Cutting a lower Cutting both higher and center position passband TWIN PBT TWIN PBT a 4 IF center frequency Interference Desired signal Interference Interference lower passbands TWIN PBT Desired signal E Auto notch function The auto notch function automatically attenuates more than 3 beat tones tuning signals etc even if they are moving The auto notch functions in SSB mode only Select SSB mode 2 Push AUTO NOTCH to turn the auto notch func tion ON 3 Push AUTO NOTCH again to cancel the function RECEIVE AND TRANSMIT 4 Auto notch OFF Auto notch ON Desired Desired signal AF signal AF Unwanted tone Particular frequency frequency is attenuated E Noise reduction The noise reduction function reduces noise compo nents and picks out desired signals which are buried in noise The received AF signals are converted to digital signals and then the desired signals are sepa rated from the noise
66. in RF gain _ adjustable S meter range squelch e When setting as RF gain control Squelch is fixed open Maximum RF gain Adjustable range Minimum RF gain e When setting as squelch control RF gain is fixed at maximum Noise squelch FM mode Noise squelch S meter squelch threshold FM mode threshold Squelch is S meter open squelch Shallow Deep RF POWER CONTROL RF POWER Continuously varies the RF output power from min imum 2 W to maximum 100 W AM mode 1 W to 40 W Decreases Increases RF POWER PANEL DESCRIPTION 1 BALANCE CONTROL BAL inner control p 30 Adjusts the audio output balance between main and sub readout frequencies while in dualwatch BAL NR Increases main Increases sub readout gain readout gain COMPRESSION LEVEL CONTROL COMP p 34 Adjusts the speech compression level in SSB Compression level increases Compression level decreases f COMP NOISE REDUCTION LEVEL CONTROL NR outer control p 26 Adjusts the noise reduction level when the noise re duction is in use Set for maximum readability BAL NR Decreases P Increases OFF NOISE REDUCTION SWITCH NR p 26 Toggles the noise reduction ON and OFF Functions in SSB CW and RTTY modes NR NR Noise reduction OFF x Noise reduction ON NOISE BLANKER SWITCH NB p 26 Toggles the noise blanker ON and OFF The noise blanker reduces pulse type noise such as
67. ing the follow ing procedure NOTE Resetting CLEARS all programmed con Y tents in memory channels and returns programmed Z values in set mode to default values NY Make sure the transceiver power is OFF While pushing M CL and F INP push POWER for 2 sec to turn power ON The internal CPU is reset The transceiver displays its initial VFO frequencies when resetting is complete Correct the set mode settings after resetting Z Optional filter settings p 55 NY H Initial settings After resetting the transceiver set controls and switches as shown in the figure below POWER F INP M CL Sa O al a m m O 7 h dark and unstable after turning power ON This is Y normal and does not indicate any equipment mal CW Max clockwise CCW Max counterclockwise ANT 1 PRE OFF METER Po ATT OFF TWIN PBT Center POWER OFF TUNER MONITOR a 6 APF NB NR OFF DSS Skee AUTO NOTCH OFF oe A AF Max CCW RF SQL 11 o clock to MIC GAIN 10 12 o clock BAL Center AGC MID LOCK OFF RF POWER Max CW COMP OFF VOX OFF Appears in some mod
68. ired memory channel from the memory channel screen e Selecting a memory channel using the memory channel screen If the start up screen is not selected if F 5 s func tion is EXIT push F 5 one or more times to exit 2 Push F 3 MEMORY to select the memory chan nel screen Jz sk Ak TN 12 34 14 195 00 lx i4 100 00 USB USB 14 205 00 ix 14 100 00 USB 3 Rotate the tuning dial while pushing F 2 SET to select the desired memory channel Push F 5 EXIT to exit the memory channel screen e Confirming programmed memory channels 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 3 appears when the memory channel is selected Push F 5 EXIT to exit the memory channel screen MEMORY OPERATION 5 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 soeedup the memory scan interval Of course select memory channels are also scanned during normal memory scan Select the memory channel screen as described at left Rotate the tuning dial while pushing F 2 SET to select the desired memory channel 3 Push F 3 SELECT to set the memory channel as a select
69. is required for each frequency Be sure to re tune the antenna before transmitting when you 7 change the frequency even slightly WW Set the desired frequency in an HF band The AH 3 will not operate on frequencies outside of ham bands Push TUNER for 2 sec The TUNER light blinks while tuning TUNER switch D Oo Oo Oo o m Oo Q The TUNER light lights constantly when tuning is complete When the connected wire cannot be tuned the TUNER light goes out the AH 3 is bypassed and the antenna wire is connected to the antenna connector on the transceiver directly To bypass the AH 3 manually push TUNER e ANTENNA TUNER OF THE IC 4KL or IC 2KL IC AT500 When using an external antenna tuner such as the IC 4KLs tuner or IC AT500 with a linear amplifier 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 si multaneously and correct tuning may not be obtained See the instruction manual included with each an tenna tuner for their respective operations 40 E E Memory channels The transceiver has 101 memory channels The mem ory mode is very useful for quickly changing to often used frequencies MEMORY OPERATION All 101 memory channels are tunable which means the programmed frequency can be tuned temporarily with the tuning dial etc in memory
70. it frequency s read out az 4k G55 2 8k T Leni 21290 00 ix i4 100 060 USB USB 21 290 00 ix i4 100 00 USB 3 Rotate the tuning dial while pushing XFC to set the transmit frequency to 21 310 MHz The transmit frequency can be monitored while push ing XFC or using dualwatch 2 4k 2 ek T 2 21 290 00 ix i4 100 060 USB SPLIT USB 21 810 00 ix i4 100 00 USB 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 CONVENIENT DIRECT SHIFT FREQUENCY INPUT The shift frequency can be entered directly Push F INP 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 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 mr CO wa 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 l
71. k split function in set mode in advance 2 Push VFO MEMO to select VFO mode az sk Ek TN IEKA 21 290 00 ix i4 1500 6060 USB USB e 14 205 00 ix 14 1500 00 USB 3 Push the desired band key Push FM to select FM mode Set the receive frequency repeater output fre quency az sk G55 2 8k TN ELETA gt 29 680 00 lx i4 100 00 USB USB i 14 205 00 ix 14 1500 6960 USB RECEIVE AND TRANSMIT 4 Push SPLIT for 2 sec to start repeater operation Subaudible tone encoder is turned ON automatically Shifted transmit frequency and amp 3 appear in the sub readout The transmit frequency can be monitored while push ing XFC or using dualwatch Gla eask T 3 74 29 680 00 ix 14 166 66 USB SPLIT FM T i 29 580 00 ije 14 18 66 USB Tone encoder is auto matically turned ON Shifted frequency appears Push and hold PTT to transmit release PTT to receive To return to simplex push SPLIT momentarily to clear the sub display E Dial lock function The dial lock function prevents accidental changes caused by the tuning dial The lock function electron ically locks the dial e Push LOCK to toggle the dial lock function ON and OFF The LOCK indicator lights when the dial lock function is in use LOCK indicator Qa Q Q a Q a O LOCK switch 38 39
72. k tuning indicator zsk G28 T e134 14 100 00 1 i4 205 00 USB Rotate the tuning dial to change the frequency in programmed kHz steps 3 Push TS again to turn OFF the indicator Rotate the tuning dial for normal tuning if desired 0000000 FREQUENCY SETTING 3 SELECTING THE kHz STEP Push TS momentarily to turn the quick tuning step ON 2 Push TS for 2 sec to enter the quick tuning step setting display Selected tuning steps for all modes appear SEM me WHEN TS is ON Select the desired operating mode 4 Push F 1 F 4 to select the 1 kHz 5 kHz 9 kHz or 10 kHz tuning step respectively Repeat steps and to select quick tuning steps for other modes if desired Push F 5 to exit the setting display SELECTING THE 1 Hz STEP The minimum tuning step of 1 Hz can be used for fine tuning Turn OFF the quick tuning step Y does not appear 2 Push TS for 2 sec to toggle the 1 Hz tuning step ON and OFF RIT and or ATX also functions in 1 Hz tuning step when used im O m Q m m m 1 Hz step indicator 2 k 2s TY Niis gt 14 195 000 ix 14 100 00 USB USB 14 205 000 ix 14 100 600 USB FILTER MEMORY 1 4 TUNING STEP FUNCTION RTTY only While operating in RTTY the 1 4 function is available for critical tuning Dial rotation is reduced to 1 4
73. kHz e Sensitivity SSB CW RTTY 0 16 uV 1 80 29 99 MHz 10 dB S N 0 13 uV 50 0 54 0 MHz 2 AM 13 uV 0 5 1 799 MHz 10 dB S N 2 uV 1 80 29 99 MHz FM 0 5 uV 28 0 29 99 MHz 12 dB SINAD 0 32 uV 50 0 54 0 MHz 2 1 Pre amp 1 ON Pre amp 2 ON e Squelch sensitivity threshold SSB CW RTTY Less than 5 6 uV FM Less than 1 0 uV e Selectivity SSB CW RTTY More than 2 4 kHz 6 dB Less than 3 8 kHz 60 dB AM More than 9 0 kHz 6 dB Less than 20 kHz 60 dB FM More than 15 kHz 6 dB Less than 30 kHz 60 dB More than 70 dB except IF through in 50 MHz band 9 999 kHz More than 2 0 W at 10 distortion with an 8 Q load 3 conductor 6 35 d mm 1 4 2 conductor 3 5 d mm 8Q e Spurious and image rejection ratio e ARIT variable range e Audio output power at 13 8 V DC e PHONES connector e EXT SP connector E Antenna tuner e Matching impedance range HF bands 16 7 to 150 Q unbalanced Less than VSWR 3 1 50 MHz band 20 to 125 unbalanced Less than VSWR 2 5 1 8 W HF bands 15 W 50 MHz band VSWR 1 5 1 or less Less than 1 0 dB e Minimum operating input power e Tuning accuracy e Insertion loss after tuning OPTIONS 1 3 IC 4KL HF 1 kW LINEAR AMPLIFIER Full duty 1 kW linear amplifier including an automatic antenna tuner Has automatic tuning and band selection capability Full break in QSK operation is possible The amplifier power sup
74. memory or not az sk Ek TN IERTA gt 14 195 00 lx i4 100 00 USB USB i 14 205 00 z lx i 100 00 USB me HEMORYI 93 adr appears for select memory channel 4 Repeat steps to to program another memory channel as a select memory channel if desired Push F 5 EXIT to exit the memory channel screen Y NOTE Setting select memory channels is also g possible in the scan screen NY 42 D MEMORY OPERATION E Memory channel programming Memory channel programming can be preformed ei ther in VFO mode or in memory mode Programming in VFO mode Set the desired frequency and operating mode in VFO mode 2 Push A V several times to select the desired memory channel Memory channel screen is convenient for selecting the desired channel 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 2 sec to program the displayed fre quency and operating mode into the memory channel EXAMPLE Programming 7 088 MHz LSB into memory channel 12 az sk EAk TN ELETA 14 100 00 lx i4 195 00 USB a Gask Aek T 74 LSE e 7 088 00 ix i4 195 090 USB o TE pE A Beep Push for 2 sec Beep ae Beep l2 4k G55 2 8k
75. mo pad read switch or the memory transfer function e Differences between VFO mode and memory mode VFO MODE MEMORY MODE pgs 41 45 VFO shows a frequency and operating mode If the frequency or operating mode is changed the VFO au tomatically memorizes the new frequency or new op erating mode When a VFO is selected from another band or mem ory mode the last used frequency and operating mode for that VFO appear EXAMPLE VFO is selected azs sk T 3174 174 100 00 1 21 625 66 USB Y The frequency is changed azs sk T 19 74 gt 14 123 000 1 21 025 00 USB Y Memory mode is selected tare i i 025 00 UFO 14 123 68 USE y VFO is selected again z sk zs T 9174 14 123 00 21 625 60 USB Changed frequency 14 123 MHz appears 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 az k 6532k 7 EER 14 123 00 WFO i4 106 60 USB Another memory channel is selected Azik Ge T 3134 21 245 00 UFO i4 100 60 USB A rats Memory channel 1 is selected again az sk G55 2 8k TN ELETA
76. mode MEMORY MEMORY TRANSFER OVER CHANNEL CHANNEL CAPABILITY TO VFO WRITING CLEAR NUMBER Regular memory 7 One frequency and one mode in channels FA each memory channel as Yes Yes Scan edge One 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 V keys e Using the keypad Push VFO MEMO to select memory mode Push F INP 2 Push A V several times to select the desired Push the desired memory channel number using memory channel the keypad Push and hold A V for continuous selection UP and DN on the microphone can also be used To return to VFO mode push VFO MEMO again Jz sk G55 2 8k TN 12134 14 195 00 lx i4 100 00 USB VFO memo 32 4k G55 2 8k J 12134 00 00 141 UFO i4 195 06 CW D e Fz 4k caz sk T Lers4 0 00 UFO 14 195 08 CU Enter 100 or 101 to select scan edge channel P1 or P2 respectively Push A or V to select the desired memory channel Jz sk EAk TN 12 134 14 100 00 UFO i4 195 00 CU E then G24 mk T GD B USE i 12 UFO 14 195 08 CU oC 32 4k G58128 T ELETA 00 24 960 UFO i4 195 06 Cl 41 E Memory channel screen The memory channel screen simultaneously shows 9 memory channels and their programmed contents You can select a des
77. ncy APF APF _ APF function OFF gt APF function ON AUTO NOTCH SWITCH AUTO NOTCH p 26 Turns the auto notch function ON and OFF The auto notch functions in SSB only V What is the notch function The notch function eliminates unwanted CW or AM carrier tones while preserving the desired signal s audio re sponse The filtering frequency is adjusted to effectively eliminate unwanted tones via the DSP circuit AUTO NOTCH AUTO NOTCH C Auto notch OFF CS Auto notch ON PASSBAND TUNING CONTROLS TWIN PBT Adjust the receiver s passband width of the 455 kHz and 9 kHz IF filters for the inner and outer con trols respectively p 25 Passband width and center frequency are displayed in the LCD Set to the center positions when not in use Variable range depends on the filter selection 1 29 kHz in 15 Hz steps and 258 kHz in 3 Hz steps are available V What is the PBT control The PBT function electronically narrows the IF passband width to reject interference The PBT is especially effec tive in SSB operation and is not available in FM opera tion TWIN PBT PANEL DESCRIPTION 1 TWIN PBT mo TWIN PBT TWIN PBT lt 2 High cut Low cut Center LOCK INDICATOR LOCK p 38 Lights when the dial lock function is activated MEMO PAD READ SWITCH MP R p 46 Each push calls up a frequency and operating mode in a memo pad The 5 or 10 most recently p
78. ng the desired channel Memory channel contents appear in the memory channel readout below the frequency readout appears if the selected memory channel is a blank channel In this case transferring is impossible G Push VFO MEMO for 2 sec to transfer the fre quency and operating mode Transferred frequency and operating mode appear on the frequency readout TRANSFERRING EXAMPLE IN VFO MODE Operating frequency 21 320 MHz USB VFO Contents of M ch 16 14 018 MHz CW 2z sk 2k T 9174 2 1 320 00 ix 14 195 08 USB oo Gas eak T 3834 moi 20 00 14 016 00 CU VFOr A Beep MEMO Beep Beep pa 4k GDL T 9834 018 00 Push for 2 sec UFO 14 14 615 68 Cl e Transferring in memory mode This is useful for transferring frequency and operating mode while operating in memory mode NOTE When you have changed the frequency or operating mode in the selected memory channel Displayed frequency and mode are transferred Programmed frequency and mode in the mem ory channel are not transferred and they remain in the memory channel BC Select the memory channel to be transferred with AJ V in memory mode And set the frequency or operating mode if required 2 Push VFO MEMO for 2 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
79. nnel if desired Push F 5 EXIT to exit the scan screen Y NOTE Select memory channels can also be set in Y the memory channel screen p 42 50 7 CLOCK AND TIMERS 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 If the start up screen is not selected if F 5 s func tion is EXIT push F 5 one or more times to exit 2 Push F 5 SET then F 3 TIME to enter timer set mode 3 Push F 1 or F 2 W to select the time adjust ment item azs Esk T 9174 gt 14 195 00 ix i4 100 090 USB USB 14 205 00 lx 14 166 66 USB Set the current time using the tuning dial TIME set push SET blinks aask EAk TN IEEETA 14 195 00 lx 14 168 66 USB USB o 14 205 00 lx 14 100 00 USB PE ee TIMER SETI ower imer se Power OFF Period N l cs ZTIME set Push CSET y me Push F 4 SET to enter the set time Push F 5 EXIT to cancel the setting Set time appears az sk Ek TN 15124 gt 14 195 00 lx i4 100 090 USB USB i 14 205 00 lx i4 100 00 USB me TIMER SETI Powe r mer se Power OFF Period Push F 5 EXIT twice to exit timer set mode E Setting power on time The transceiver can be set to tu
80. nt frequencies 5 are in memo pads and 1 is in the tempo rary pad are called up by MP R NOTE If you change the frequency or operating mode called up from a memo pad with the tuning dial etc the frequency and operating mode in the temporary pad are erased BMQQg MEMO PADS 14 195 00 14 182 40 21 018 06 21 024 52 21 276 00 Push VFO or MEMORY mode display 14 195 00 Pushing MP R calls up the frequency and operating mode ina memo pad and the temporary pad sequentially TEMPORARY PAD 1 485 00 Frequency and mode before pushing MP R ee ey 46 E 47 SCANS E Scan types L 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 a LEY aa OE aay Bee aaa This scan operates in VFO mode AF SCAN Repeatedly scans within AF span area Start frequency AF frequency This scan operates in both VFO and memory modes Pe i i oes oe el coe e 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 functions See p 30 for details AF frequency MEMORY SCAN Repeatedly scans all programmed memory channels amp select select Mh 1 amp select amp
81. o sound comes from the Volume level is too low Rotate AF clockwise to obtain a suitable p 1 speaker listening level e The squelch is closed e Rotate RF SQL to 10 o clock position to open p 2 the squelch e The transceiver is in the transmitting condition e Push TRANSMIT to receive or check the p 1 SEND line of an external unit if desired Sensitivity is low e The antenna is not connected properly Reconnect to the antenna connector e The antenna for another band is selected Select an antenna suitable for the operating p 3 frequency e The antenna is not properly tuned e Push TUNER for 2 sec to manually tune the p 39 m antenna O e The attenuator is activated Push ATT one or more times to select ATT p 3 E OFF Receive audio is distorted e The operating mode is not selected correctly e Select a suitable operating mode p 25 PBT function is activated e Set TWIN PBT to the center position p 25 e Noise blanker function is activated Push NB to turn the function OFF p 26 e Preamp is activated Push P AMP once or twice to turn the function p 3 OFF e The noise reduction is activated and the NR Set the NR control for maximum readability p 26 control is set 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 58 function MANUAL Transmitting is impossi e The opera
82. ock functions to change the transmit frequency only The split lock function cancels the dial lock function while pushing 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 57 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 2 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 con venience it can be turned OFF in set mode p 56 In this case the SPLIT switch does not equalize the main and sub readout frequencies Suppose you are operating at 21 290 MHz USB in VFO mode l2 4k G52 T ory 2 1 290 00 ix 14 1600 00 USB USB o 14 205 00 ix i4 100 00 USB RECEIVE AND TRANSMIT 4 Push SPLIT for 2 sec 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 2 4k J Gr USB 2 1 290 00 iw i4 100 090 USB SPLIT USB o 21 290 00 lw i4 100 090 USB
83. of nor mal when the 1 4 function is in use Push 1 4 to toggle the 1 4 function ON and OFF 1 4 tuning step OFF 1 4 tuning step ON 1 4 1 4 OFF ON AUTO TUNING STEP FUNCTION AM FM only When selecting AM or FM the quick tuning step is au tomatically selected by the auto tuning step function 24 25 4 RECEIVE AND TRANSMIT E Mode selection The following modes are available in the IC 756 SSB LSB USB CW CW R CW reverse RTTY RTTY R RTTY reverse AM FM and FM T FM with subaudible tone Narrow modes of each of these are also available To select a mode of operation push the desired mode switch momentarily Push the switch again to toggle between normal and narrow mode Push the switch for 2 sec to toggle between USB and LSB CW and CW R RTTY and RTTY R FM and FM T if neces sary See the diagram at right for the order of selection use se b USB N LSB N CW lt gt CW R_ m gt CW N gt CW RN RTTY gt RTTY R gt RTTY N RTTY RN AM ja raren AM N FM FM T H gt FM N gt FM TN Push mode switch Bence 7 Push mode switch for 2 sec momentarily E Twin PBT operation The twin PBT Passband Tuning function electronically narrows the receiver s IF passband widths to reduce interference Moving both TWIN PBT controls to the same position sh
84. ol adjustment is required INSTALLATION AND CONNECTIONS 2 E Remote jack CI V information CI V connection example The transceiver can be connected through an optional CT 17 Cl V LEVEL CONVERTER to a personal computer equipped with an RS 232C port The Icom Communi cation Interface V CI V controls the following func tions of the transceiver Personal computer Up to four Icom CI V transceivers or receivers can be connected to a personal computer equipped with an RS 232C port See p 60 for setting the CI V condition using set mode e Data format The CI V system can be operated using the following data formats Data formats differ according to com Command table mand numbers A data area or sub command is added Description Command Sub command for some commands Frequency setting 05 Data LSB 00 CONTROLLER TO IC 756 USB 01 7 AM 02 FE FE 50 Eo Cn Sc Data area e g 10 FD Operating mode cw 06 03 RTTY 04 r Pa Ne z of t FM 05 E 3 g Ss 8 VFO mode selection E ge SB 2 S D MAIN lt gt SUB BO g Sos BE og oe D MAIN SUB B1 S Sa SS S S D Dualwatch OFF 07 co o So y BAe 2 o gt Dualwatch ON C1 c vs 2 gk ES Beas E Main readout selection DO E 83 L ESOS oog
85. ol can be set as the RF squelch RF S L RF SQL control as RF squelch control control default the RF gain control only squelch is default fixed as open or squelch control RF gain is fixed at RF RF SQL control as RF gain control maximum Sat RF SQL control as squelch control See p 2 for details When this item is set to ON pushing DUALWATCH ON OFF for 2 sec sets the sub readout frequency to the main readout frequency and activates dualwatch operation See p 30 for details Quick dualwatch ON default Quick dualwatch OFF When this item is set to ON pushing SPLIT for 2 sec sets the sub readout frequency to the main read out frequency and activates split operation See p 32 for details OH Quick split ON default OFF Quick split OFF 56 8 SET MODE E Miscellaneous others set mode continued This item sets the offset difference between transmit 168MHz 4 BEEMHZ and receive frequencies for the quick split function Minus 0 1 MHz offset Minus 4 0 MHz offset However this setting is used for HF bands in FM default 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 This item sets the offset difference between transmit 1 BHEMHZ 4 BHEMHZ and receive frequencies for the quick split function Minus 1 0 MHz offset Plus 4 0 MHz offset However this setting is
86. other desired frequency using the tuning dial Adjust BAL to set a suitable signal strength bal ance between the main and sub readout frequen cies S meter shows the combined signal strength To transmit on the sub readout frequency push CHANGE or SPLIT RIT function can be used for the main readout only ATX function can be used for the transmit readout main readout when the split function is OFF sub readout when the split function is ON CVA e Scanning during dualwatch Scanning operates only 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 Program the desired programmed scan edges in the same amateur band See p 43 for program ming If 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 GWM appears 3 2 4k 55 2 8 7 _ Link 21 290 00 ix i4 100 00 USE SPLIT USB o 14 205 00 ix 14 100 00 USB 3 Select VFO mode for the main readout Set the desired operating frequency for the main readout Push DUALWATCH for 2 sec The main and sub readout frequencies are equalized and the dualwatch function is turned ON Jz sk G55 2 8k T 12 34 2 1 290 00 Tx 14 180 08 LSB SPLIT USB e 21 290 00 a ix i4 100 090 USB
87. ply unit and the remote control unit are separated EX 627 AUTOMATIC ANTENNA SELECTOR Automatically selects the antenna for the selected HF ham band Manual selection is possible for the 50 MHz band e Max input power 1000 W PEP AH 3 HF AUTOMATIC ANTENNA TUNER Specially designed to tune a long wire an tenna for portable or mobile HF operation The PTT tuner start function provides sim ple operation e Input power rating 150 W AH 2b ANTENNA ELEMENT A 2 5 m long antenna element for mobile Operation with the AH 3 Frequency coverage 3 5 28 MHz bands with the AH 3 PS 85 DC POWER SUPPLY Light weight switching regulator system power supply Output voltage 13 8 V DC e Max current drain 20 A SM 20 DESKTOP MICROPHONE Unidirectional electret microphone for base station operation Includes UP DOWN switches and a low cut function FL 100 FL 101 FL 223 and FL 232 9 MHz FILTERS FL 100 500 Hz 6 dB CW nar FL 101 250 Hz 6 dB CW nar FL 223 1 9 kHz 6 dB SSB nar e FL 232 350 Hz 6 dB RTTY CW nar FL 52A FL 53A FL 222 and FL 257 455 kHz FILTERS FL 52A 500 Hz 6 dB CW nar FL 53A 250 Hz 6 dB CW nar FL 222 1 8 kHz 6 dB SSB nar FL 257 3 3 kHz 6 dB SSB wide IC 2KL HF 500 W LINEAR AMPLIFIER All solid state 500 W linear amplifier The power amplifier unit can be separately set up from the power supply unit IC AT500 H
88. push F 3 SELECT again to return to memory scan if desired az k G55 2 Sk VARU 12234 oe u Av g 5 0 E Oo 14 1ee ee CSE USB 14 205 00 ix 14 100 600 USB me SCAN SELECT MEMORY SCAN dF SPan t 18kHz Programmed P1 _6 560 B MHZ can edges P2 29 999 99MHZz 4 T E SELECT AF SPAH 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 MEMORY X Z NOTE 2 or more memory channels must be des Y ignated as select memory channels for select GY memory scan to start OV If the start up screen is not selected if F 5 s func tion is EXIT push F 5 one or more times to exit 2 Select memory mode 3 Push F 4 SCAN to select the scan screen az k G55 2 8k 7 12534 14 195 00 UFO 14 166 88 USB USB 14 205 00 lx 14 108 08 USB Me m SCAN dF SPan Programmed P1 Scan edges P2 Select the desired memory channel to set as se lect memory channel Push F 3 SELECT to set the memory channel as a select memory or not alr appears for select memory channels aa sk G55 2 8k 7 1234 14 195 00 UFO i4 1600 606 USB USB e 14 205 00 ix 14 100 00 USB 5CAH dF SPan Programmed Pi Scan edges P2 Repeat steps to to program another memory channel as a select memory cha
89. racter for memory keyer pro gramming or memory name pgs 36 45 Toggles the antenna connector selection between ANT1 R and ANT2 R when pushed p 37 e Toggles the receive antenna ON and OFF when pushed for 2 sec e Selects RF power Po SWR or ALC me tering during transmit p 34 e Selects one of 2 receive RF preamps or bypasses them P AMP1 activates 10 dB preamp for HF all bands P AMP2 activates 16 dB high gain preamp for 21 MHz band and above 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 e 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 broad casting station are near your location Activates or selects fast middle or slow AGC time constant when pushed The setting becomes fast in FM mode re gardless of this setting Deactivates the AGC circuit when pushed for 2 sec Y NOTE While AGC OFF is selected the Z S meter does not function Y 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 FA
90. reen e Setting the contact serial number Contact number can be automatically transmitted from one of the memory keyer channels The morse cut numbers can be used as the contact numbers The maximum number for contact numbers is 9999 Push CW to select CW mode 2 Push KEYER to select keyer set mode 3 Push F 3 001 to enter contact number screen MD m CONTACT NUMBER 00131 N Count uP trigger Present number Bai 4 Rotate the tuning dial to select the cut number type if desired i does not use morse cut numbers sets 1 as A 9 as N and as O i sets 1 as A 9 as N and as T sets 9 as N and as O iT sets 9 as N and as T Push F 2 to select the Count up trigger item PES me CONTACT NUMBER 001 1s biti rari le Rotate the tuning dial to select the desired mem ory channel for contest numbers Push F 5 EXIT to exit keyer set mode e Clearing contact numbers Push CW to select CW mode 2 Push KEYER to select keyer set mode 3 Push F 3 001 to enter the contact number screen 4 Push F 4 001CLR for 2 sec to clear the contact number Push F 5 EXIT to exit keyer set mode 36 4 RECEIVE AND TRANSMIT 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 monitorin
91. rn ON automatically at a specified time If the start up screen is not selected if F 5 s func tion is EXIT push F 5 one or more times to exit 2 Push F 5 SET then F 3 TIME to enter timer set mode 3 Push F 1 or F 2 W to select the power on time item Set the desired power on time using the tuning dial TIMER set push SET blinks ie eC TIMER SETI Time tno Power OH timer set Power OFF Period whe oan Lpa AE GONA N l TIMER set Push SET Z ee i ee Push F 4 SET to enter the set time Push F 5 EXIT to cancel the setting Push F 5 EXIT twice to exit timer set mode 51 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 If the start up screen is not selected if F 5 s func tion is EXIT push F 5 one or more times to exit 2 Push F 5 SET then F 3 TIME to enter timer set mode 3 Push F 1 or F 2 W to select the power off pe riod item HE mc TIMER SETI ime now Power on tiner set owe tT CLOCK AND TIMERS Set the desired power off periods using the tuning dial TIMER set push SET blinks me TIMER SETI ime Cnow Power ON timer set Power DFF Period 12 34 SARUNI minge A x R l r Z TIMER set P
92. ro grammed 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 59 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 23 Icom s triple band stacking register 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 A V is necessary at the end pgs 23 41 e g to enter 14 195 MHz push F INP ENT 1 4 1 9 5 F INP ENT MEMO PAD WRITE SWITCH MP W p 46 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 59 RECEIVE INDICATOR RX Lights green while receiving a signal and when the squelch is open TRANSMIT INDICATOR TX Lights red while transmitting LCD FUNCTION DISPLAY See p 9 for details Shows the operating frequency function switch menus spectrum screen memory channel screen set mode settings etc 1 PANEL DESCRIPTION USE wo T4 ix 14 100 098 USB
93. should be a coaxial cable When using 1 antenna use the ANT 1 connector CAUTION Protect your transceiver from lightning by Z usi lightning arrestor Y using a lig a PL 259 CONNECTOR INSTALLATION 30 mm Slide the coupling ring a mm down Strip the cable gt jacket and soft solder Coupling ring 10 mm soft solder 10MM soft Strip the cable as I solider shown at left Soft FE solder the center con 1 2 mm ductor solder solder Slide the connector O 3 x ee Ics body on and solder it Screw the coupling ring onto the connector body i 30mm 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 756 has an SWR meter to monitor the antenna SWR continuously INSTALLATION AND CONNECTIONS 2 E Required connections e Front panel CW KEY
94. stead of relying on hastily scribbled notes that are easily misplaced e Writing frequencies and operating modes into memo pads You can simply write the accessed readout frequency and operating mode by pushing MP W 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 Y NOTE Each memo pad must have its own unique combination of frequency and operating mode memo pads having identical settings cannot be written Oss Displayed frequency and mode 21 288 22 Loew 14 195 001 west 14 182 40 MEMO E PADS 2 1 018 06 21 024 52 i 21 276 00 Wiest The oldest written frequency ep and mode are erased 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 one or more 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 one or more times You may think there are 6 memo pads because 6 differe
95. teps are available Quick tuning indicator iz 4k GS28 TV 317g USB x e 14 100 00 14 205 00 USB e While the quick tuning step is OFF turns the 1 Hz step ON and OFF when pushed for 2 sec 1 Hz indications appear in both readouts and the fre quency can be changed in 1 Hz steps e While the quick tuning step is ON enters the quick tuning step set mode when pushed for 2 sec TRANSMIT FREQUENCY CHECK SWITCH XFC Monitors the transmit frequency when pushed and held when the split frequency function is ON While pushing this switch the transmit frequency can be changed with the tuning dial keypad memo pad or the A V switches When the split lock function is turned ON pushing XFC cancels the dial lock function p 57 E Microphone HM 36 UP DOWN SWITCHES UP DN Change the selected readout frequency or memory channel Continuous pushing changes the frequency or memory channel number continuously While pushing XFC the transmit readout frequency can be controlled while in spilt frequency operation The UP DN switch can simulate a key paddle Preset in the keyer set mode p 35 e MICROPHONE CONNECTOR Front panel view Main readout AF output varies with AF BAL Microphone input GND LAIPS T D Microphone ground 8 V DC output he ot GND PTT ground VOR i 9_U Frequency up down ra A PTT Main readout squelch switch HM 36 SC
96. that gen erated by automobile ignition systems This function cannot be used for FM or non pulse type noise NB NB Noise blanker OFF x Noise blanker ON S RF METER p 34 Shows the signal strength while receiving Shows the relative output power SWR or ALC levels while transmitting MONITOR SWITCH MONITOR p 33 Monitors your transmitted IF signal The CW sidetone functions when MONITOR is OFF in CW mode ANTENNA TUNER SWITCH TUNER p 39 e Turns the antenna tuner ON and OFF bypass when pushed momentarily e Starts to tune the antenna manually when pushed for 2 sec When the tuner cannot tune the antenna the tuning circuit is bypassed automatically after 20 sec 1 PANEL DESCRIPTION B fA ix i4 100 00 USB UFO 14 100 600 USB 3 2 4k 55 2 8k 7 ipiis 95 000 z USB 14 205 000 DA TWIN PBT DEDE oG mte oa meen e meee Gea we x Loc al 0 om IT ATX IGS D H Bj SEZ OOH COMP KEY S EED BK IN ELAY MULTI FUNCTION SWITCHES e Push to select the functions indicated in the LCD display to the right of these switches Functions vary depending on the operating condition e Push to input a cha
97. ting frequency is not set to a ham Set the frequency to a ham band p 23 ble band Output power is too low e RF POWER is set too far counterclockwise Rotate RF POWER clockwise p 2 MIC GAIN is set too far counterclockwise e Set MIC GAIN to a suitable position p 1 e The antenna for another band is selected Select an antenna suitable for the operating p 3 frequency e The antenna is not properly tuned e Push TUNER for 2 sec to manually tune the p 39 antenna 2 lt No contact possible with RIT or ATX function is activated e Push RIT or ATX to turn the function OFF p 5 fe another station e Split frequency function and or dualwatch are e Push SPLIT and or DUALWATCH to turn the pgs 4 activated function OFF 30 31 Transmitted signals are MIC GAIN is set too far clockwise e Set MIC GAIN to a suitable position p 1 distorted Repeater cannot be Split frequency function is not activated e Push SPLIT to turn the function ON p 4 accessed e Programmed subaudible tone frequency is Reset the frequency using set mode p 57 wrong Programmed scan does Squelch is open e Set RF SQL to the threshold point p 2 not stop RF SQL is assigned to RF gain control and Reset RF SQL control assignment and setitto pgs squelch is open the threshold point 2 56 z Programmed scan does The same frequencies have been programmed Program different frequencies in scan edge p 43
98. to respond While pushing XFC you can monitor your transmit frequency 32 4 RECEIVE AND 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 transmit tones p 54 The CW sidetone functions re gardless of the MONITOR switch setting Push MONITOR The indicator lights when the monitor function is ON If the start up screen is not selected if F 5 s func tion is EXIT push F 5 one or more times to exit 3 Push F 5 SET then F 1 LEVEL to enter level set mode Push F 1 A or F 2 W to select the monitor ad justment item Adjust monitor gain using the tuning dial Pushing F 3 DEF sets the selected item to the default value of the item Push F 5 EXIT twice to exit level set mode Y Use headphones to prevent feedback e Set the transmit tone settings to the 0 dB posi tions to check the unaltered characteristics of transmitter or microphone QQ CSS PHONES jack MONITOR switch az k G552 8k 7 Lrg 14 195 00 ix i4 100 00 USB USE i 14 205 00 ix i4 100 090 USB HPE me CLEVEL SETI Ta tone Bass tone Treble itor E VOX function The VOX Voice Operated Transmission function tog gles between transmit and receive with your voice This function provides an opportunity to
99. tting can be substituted for a bug key while operating with a paddle Set for straight for a real bug key or connect the bug key to KEY on the rear panel Push F 2 to select the Mic up down keyer item E pep Cl FEVER SETTING RePeat HAEE ratio Paddle Polarity type Q Rotate the tuning dial to turn the substitute paddle function ON or OFF The up down keys of the microphone can be substi tuted for a paddle When ON is selected they do not function as up down keys in all modes 2 Push F 5 EXIT to exit keyer set mode KEYING WEIGHT EXAMPLE morse code K DOT DASH Fixed DASH UU Weight setting 1 1 3 default _ Weight setting Adjusted Adjustable range SPACE Fixed SPACE and DOT length can be adjusted with KEY SPEED only 35 E Memory keyer The memory keyer memorizes and can re transmit 4 CW key codes for often used CW sentences antenna types etc Total capacity of the memory keyer is 55 characters in each memory channel Programming the memory keyer Push CW to select CW mode 2 Push KEYER to select keyer set mode 3 Push F 2 EDIT to enter the memory keyer edit screen M Z az sk EAk TN 1213s 14 195 00 lx i4 100 00 USB Character cu keys ee 14 205 00 ix 14 100 00 USB mE KCHORY KEVER EDIT Ube iP Bic TEELE TEST DE JAI nz Uk 5WH BK M3 CFM TU M4 QRZ Memory ch select
100. unit installation OH Signal level announcement default OFF No signal level announcement This item sets the number of memo pad channels z 16 available 5 or 10 memo pads can be set 5 memo pads 10 memo pads default This item sets the rate at which frequencies are HIGH LOW scanned when the microphone UP DN switches High speed default Low speed are pushed and held High or low can be selected 50 tuning steps sec 25 tuning steps sec E Miscellaneous others set mode continued SET MODE 8 This item sets the data transfer rate 300 1200 4800 AUTO 13266 9600 19200 bps and AUTO are available Auto baud rate 19200 bps default When AUTO is selected the baud rate is automati cally set according to the connected controller or re mote controller To distinguish equipment each CI V transceiver has 78h fF its own Icom standard address in hexadecimal code Address of 50h Address of 7Fh The IC 756 s address is 50h default When 2 or more IC 756 s are connected to an op tional CT 17 Cl V LEVEL CONVERTER rotate the tuning dial to select a different address for each IC 756 in the range 01h to 7Fh Transceive operation is possible with the IC 756 con ON OFF nected to other Icom HF transceivers or receivers Transceive ON Transceive OFF default When ON is selected changing the frequency op erating mode etc on the IC 756
101. ush SET Z a ate Push F 4 SET to enter the set time Push F 5 EXIT to cancel the setting Push F 5 EXIT twice to exit timer set mode E Timer operation 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 Q Q im O m im oO 3 Push POWER for 2 sec to turn the power OFF The POWER light lights continuously 4 When the set time arrives the power is automati cally turned ON 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 52 mm 8 SET Move 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 If the start up screen is not selected if F 5 s func tion is EXIT push F 5 one or more times to exit 2 Push F 5 SET to select the set mode screen G Push F 1 LEVEL F 2 DISP F 3 TIME or F 4 OTHERS to enter the desired set mode 4 Push F 1 A or F 2 W to select the desired item Set the desired condition using the tunin
102. vel When the meter movement shows the input signal level ALC exceeds the allowable level the ALC limits the RF power In such cases reduce the MIC GAIN control E Speech compressor The RF speech compressor increases average RF output power improving signal strength and readabil ity in SSB Select USB or LSB mode 2 Preset the transceiver as follows COMP function OFF METER function ALC RF POWER control Max counterclockwise 3 Adjust the MIC GAIN While transmitting at your normal voice level the ALC meter should read at about the middle of the ALC zone 4 Push COMP to turn the speech compressor ON Adjust the COMP control so that the ALC meter reads within the ALC zone whether you speak softly or loudly Y When the ALC meter peaks above the ALC zone your transmitted voice may be distorted NY E SWR reading METER switch MIC GAIN control RF POWER control COMP switch COMP control ALC meter The SWR meter indicates the SWR over the trans mission line in all modes Push TUNER to turn the antenna tuner OFF 2 Push METER to select the Po meter 3 Push RTTY to select RTTY mode Push TRANSMIT Rotate RF POWER clockwise past the 12 o clock position for more than 30 W output power 30 Set transmit meter to the SWR meter Read the SWR on the SWR meter SWR meter Less than
103. wer E Memory channels kesessel 41 E Fuse replacement CPU resetting esssssssssesnseeenee 21 E Memory channel Selacton ee se E Clock backup battery E Initial settings E Memory channel screen 42 replacement 0 eee 64 E VFO description ccssssssssessseeeeee 20 E Memory channel programming 43 HE Tuning dial brake adjustment 65 E Frequency setting with the E Frequency transferring 0004 44 E Frequency calibration tuning dial sssccsccsssssssssseessssssseee 23 E Memory NAMOS 1 1121211111111121 45 approximate sci diasauninndnal 65 E Direct frequency entry with E Memory clearing eie 45 the keypad sisitan 23 monet ey cane eter ee 46414 INTERNAL VIEWS esescsosssssnee 66 E Advanced tuning functions 24 6 SCANS sei ccseeecteccteecceeeisie 47 50 E Scan types ie ae 47 12 SPECIFICATIONS c ceee 67 M Preparation o e 47 E Programmed scan operation 48 13 OPTIONS cise iciee ects ectebeecesctees 68 UNPACKING Accessories included with the IC 756 Qty i DC power cable OPC 025A cccccceseeseseesseeesees 1 KA i il Hand microphone HM 36 ccccccseseseeeteeeeeeees 1 Spare fuses FGB 20 A seesseecsesssesstesseeseeeseeees 2 Spare fuse FGB 5 A sesiisincsses siisaeraicidecnsaer aces 1 CW keyer plug AP 330 c cecesceeseseseeseseseeeeees 1 E Front panel
104. wpm min to 56 wpm max can be set Slow Fast KEY SPEED SEMI BREAK IN DELAY CONTROL BK IN DELAY Adjusts the transmit to receive switching delay time for CW semi break in operation Long delay for slow speed keyin BK IN DELAY R ying Short delay for high speed keying MODE SWITCHES Selects the desired mode p 25 Announces the selected mode when an optional UT 102 is installed pgs 59 61 e Selects SSB and SSB narrow USB N LSB N mode alternately Toggles USB and LSB mode when pushed for 2 sec e Selects CW and CW narrow CW N mode alternately e Toggles CW and CW R CW reverse mode when pushed for 2 sec e Selects RTTY and RTTY narrow RTTY N mode alternately e Toggles RTTY and RTTY R RTTY re verse mode when pushed for 2 sec a f lt e Selects AM and AM narrow AM N mode alternately e Selects FM and FM narrow FM N mode alternately e Toggles the subaudible tone encoder ON and OFF in FM mode when pushed for 2 sec pgs 38 57 PANEL DESCRIPTION 1 LCD FUNCTION SWITCHES F 1 F 5 Push to select the function indicated in the LCD dis play above these switches Functions vary depending on the operating condition SPEECH SWITCH SPEECH pgs 59 61 Announces the selected readout frequency when an optional UT 102 is installed TUNING DIAL p 23 Changes the displayed frequency selects set mode items etc MAIN SUB SWITC
105. y keyer is available for your conve nience p 36 RTTY MICROPHONE CONNECTOR MIC Accepts the supplied or optional microphone See p 68 for appropriate microphones See p 8 for microphone connector information AF CONTROL AF inner control Varies the audio output level from the speaker AF RF SQAL Decreases y Increases No audio output Max audio output MIC GAIN CONTROL MIC GAIN Adjusts microphone input gain Y 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 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 received The squelch is particularly effective for FM It is also available for other modes The control can be set as the RF gain control only squelch is fixed open or squelch control RF gain is fixed at maximum in set mode as follows p 56 11 to 12 o clock position is recommended for any set ting of the RF SQL control e When setting as RF gain squelch control Noise squelch FM mode Recommended level a Squelch is Fg gt Maximum open DVZ RF ga

Icom IC-756 User's Manual

Contents

Download Pdf Manuals

Related Search

Related Contents