INSTRUCTION MANUAL HF/50 MHz ALL MODE TRANSCEIVER i756PRO™
IMPORTANT READ THIS INSTRUCTION MANUAL CAREFULLY before attempting to operate the transceiver. SAVE THIS INSTRUCTION MANUAL. This manual contains important safety and operating instructions for the IC-756PROII. EXPLICIT DEFINITIONS WORD DEFINITION R WARNING Personal injury, fire hazard or electric shock may occur. CAUTION NOTE Equipment damage may occur. If disregarded, inconvenience only. No risk or personal injury, fire or electric shock.
1 TABLE OF CONTENTS IMPORTANT ........................................ i EXPLICIT DEFINITIONS ..................... i PRECAUTIONS ................................... i 1 TABLE OF CONTENTS ................ 1 2 PANEL DESCRIPTION ........... 2 – 13 ■ Front panel ..................................... 2 ■ Microphone (HM-36) ...................... 9 ■ LCD display .................................. 10 ■ Screen menu arrangement ........... 11 ■ Rear panel ....................................
2 PANEL DESCRIPTION ■ Front panel !6 !5 !2 HF/50MHz TRANSCEIVER TIMER q !4 !3 POWER TRANSMIT w i756PRO™ PHONES TUNER MONITOR NB NR e ELEC-KEY AF RF/SQL BAL NR r MIC t MIC GAIN RF POWER F-1 F-2 F-3 F-4 F-5 SSB CW/RTTY AM/FM FILTER EXIT/SET COMP BK-IN DELAY KEY SPEED y u i o !0 !1 q POWER SWITCH [POWER/TIMER] ➥ Push momentarily to turn power ON. (dot) (com) (dash) • Turn the optional DC power supply ON in advance.
PANEL DESCRIPTION i RF GAIN CONTROL/SQUELCH CONTROL [RF/SQL] (outer control) Adjusts the RF gain and squelch threshold level. The squelch removes noise output from the speaker (closed condition) when no signal is received. • The squelch is particularly effective for FM. It is also available for other modes. • 12 to 1 o’clock position is recommended for any setting of the [RF/SQL] control.
2 PANEL DESCRIPTION ■ Front panel (continued) @9 @8 @7 @6 TWIN PBT EIVER SPLIT 1.8 1 3.
PANEL DESCRIPTION ➥ Transfers the memory contents to VFO when pushed for 1 sec. (p. 54) @8 MAIN/SUB CHANGE SWITCH [CHANGE] ➥ Switches the frequency and selected memory channel between main and sub readouts when pushed. • Switches between transmit frequency and receive frequency when the split frequency function is ON. (p. 32) ➥ Equalizes the sub readout frequency to the main readout frequency when pushed for 1 sec.
2 PANEL DESCRIPTION ■ Front panel (continued) $7 $6 $5 $4 $3 $1 $2 $0 #9 TWIN PBT CEIVER SPLIT 1.8 1 3.
PANEL DESCRIPTION #7 PBT CLEAR SWITCH [PBT CLR] (p. 25) Clears the PBT settings when pushed for 1 sec. • The [PBT CLR] indicator lights when PBT is in use. #8 NOTCH SWITCH [NOTCH] (p. 26) ➥ Switches the notch function between auto, manual and OFF in SSB and AM modes. ➥ Turns the manual notch function ON and OFF when pushed in CW mode. ➥ Turns the auto notch function ON and OFF when pushed in FM mode. • “AN” appears when auto notch is in use. • “MN” appears when manual notch is in use.
2 PANEL DESCRIPTION ■ Front panel (continued) $9 %0 %1 %2 %3 $8 TWIN PBT EIVER SPLIT 1.8 1 3.5 2 7 3 DUAL WATCH 10 4 14 5 18 6 Z 21 7 24 8 28 9 MW 50 0 F-INP ENT CHANGE Y PBT CLR VFO/ MEMO 756PRO™ NB GENE MP-W NOTCH TS MP-R CW PITCH MAIN/ SUB NR XFC RX BAL NOTCH M-CL TX NR LOCK RIT TX RIT/ F-1 F-2 F-3 F-4 F-5 SSB CW/RTTY AM/FM FILTER EXIT/SET REC/PLAY CLEAR TX LOCK/SPEECH COMP BK-IN DELAY KEY SPEED $8 LCD FUNCTION DISPLAY (See p.
PANEL DESCRIPTION 2 ■ Microphone (HM-36) q w q UP/DOWN SWITCHES [UP]/[DN] Change the selected readout frequency or memory channel. w PTT SWITCH Push and hold to transmit; release to receive. • 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.
2 PANEL DESCRIPTION ■ LCD display !6 q w e w ANT 1 METER Po BW 2.4k SFT TX VFO 1ß P.AMP 1 AGC MID VOX OFF COMP OFF WIDE SPAN !0 o qw:pp 0 USB FIL2 qr.qqy.pp 21.085.00 56ß USB CW VFO 21.085.00 -12.5k Grid 10k 10dB ATT 10dB i u FIL2 qr.qpp.pp ATT OFF r !5 !4 !3 !2 !1 i u CW SPECTRUM SCOPE +12.5k y SUB MARKER HOLD ATT MARKER HOLD SET t q TX INDICATOR Indicates the frequency readout for transmit. w VFO/MEMORY CHANNEL INDICATOR (pgs.
PANEL DESCRIPTION 2 ■ Screen menu arrangement The following screens can be selected from the start up screen. Choose the desired screen using the following chart. Pushing [EXIT/SET] several times returns to the start up screen. See p. 65 for set mode arrangement. • Start up screen ANT 1 METER Po P.AMP 1 BW 2.4k SFT TX VFO qw:pp 0 CW FIL2 qr.qpp.pp CW --. ---. -- 1 VFO USB FIL2 qr.qpp.pp ATT 0FF 1 CW --. ---. -- • Spectrum scope screen (p.
2 PANEL DESCRIPTION ■ Rear panel !4 !3 !2 qw !1 e q RECEIVE ANTENNA CONNECTOR [RX ANT] (p. 16) Connects a 50 Ω general coverage antenna with an RCA connector. w TRANSVERTER JACK [XVERT] (p. 19) External transverter input/output jack. Activated by voltage applied to [ACC(2)] pin 6. e TUNER CONTROL SOCKET [TUNER] (p. 16) Accepts the control cable from an optional AH-4 HF/50 MHz AUTOMATIC ANTENNA TUNER or AH-3 HF AUTOMATIC ANTENNA TUNER.
PANEL DESCRIPTION !2 ANTENNA CONNECTOR 1 [ANT1] !3 ANTENNA CONNECTOR 2 [ANT2] (pgs. 14, 15) Accept a 50 Ω antenna with a PL-259 connector. 2 !4 GROUND TERMINAL [GND] (pgs. 14, 15) Connect this terminal to a ground to prevent electrical shocks, TVI, BCI and other problems. When using an optional AH-4 HF/50 MHz AUTOMATIC ANTENNA TUNER or AH-3 HF AUTOMATIC ANTENNA TUNER, connect it to the [ANT1] connector.
3 INSTALLATION AND CONNECTIONS ■ Unpacking ■ Antenna connection After unpacking, immediately report any damage to the delivering carrier or dealer. Keep the shipping cartons. For radio communications, the antenna is of critical importance, along with output power and sensitivity. Select antenna(s), such as a well-matched 50 Ω antenna, and feedline. 1.5:1 or better of Voltage Standing Wave Ratio (VSWR) is recommended for your desired band. Of course, the transmission line should be a coaxial cable.
INSTALLATION AND CONNECTIONS 3 ■ Required connections • Front panel CW KEY TWIN PBT HF/50MHz TRANSCEIVER TIMER POWER TRANSMIT SPLIT 1.8 1 3.
3 INSTALLATION AND CONNECTIONS ■ Advanced connections • Front panel TWIN PBT HF/50MHz TRANSCEIVER TIMER HEADPHONES POWER TRANSMIT SPLIT 1.8 1 3.
INSTALLATION AND CONNECTIONS ■ Power supply connections 3 CAUTION: Before connecting the DC power cable, check the following important items. Make sure: • The [POWER] switch is OFF. • Output voltage of the power source is 12–15 V when you use a non-Icom power supply. • DC power cable polarity is correct. Use an optional DC power supply with a 25 A capacity and above when operating the transceiver with AC power. Refer to the diagrams below.
3 INSTALLATION AND CONNECTIONS ■ Linear amplifier connections Use the [ANT1] connector when connecting a linear amplifier. CONNECTING THE IC-PW1 Remote control cable (supplied with the IC-PW1) To an antenna ACC-1 ACC cable (supplied with the IC-PW1) Be sure to connect the cable to the 7-pin ACC(2) jack.
INSTALLATION AND CONNECTIONS 3 ■ External antenna tuner connection CONNECTING THE AH-4/AH-3 The AH-4 or AH-3 must be connected to [ANT1]. Long wire or optional AH-2b Coaxial cable (from the AH-4 or AH-3) ANT1 Control cable Transceiver Ground AH-4 or AH-3 ■ Transverter jack information When 2 to 13.8 V is applied to pin 6 of [ACC(2)], the [XVERT] jack is activated for transverter operation and the antenna connectors do not receive or transmit any signals. (p.
3 INSTALLATION AND CONNECTIONS ■ FSK and AFSK (SSTV) connections To connect a terminal unit, TNC or scan converter, refer to the diagram below. For RTTY operation: Narrow filter settings may not pass RTTY signals. Be sure to select the appropriate IF filter settings corresponding to the signal width. (p.
FREQUENCY SETTING 4 ■ When first applying power (CPU resetting) Before first applying power, make sure all connections required for your system are complete by referring to Chapter 3. Then, reset the transceiver using the following procedure. [F-INP] [M-CL] [POWER] Resetting CLEARS all programmed contents in memory channels and returns programmed values in set mode to default values. q Make sure the transceiver power is OFF. w While pushing [M-CL] and [F-INP], push [POWER] for 1 sec. to turn power ON.
4 FREQUENCY SETTING ■ VFO description VFO is an abbreviation of Variable Frequency Oscillator, and traditionally refers to an oscillator. The transceiver’s VFO is somewhat different. The VFO of the IC-756PROII acts like a computer’s window and can show one frequency and one operating mode. You can call up a desired frequency to the VFO with the keypad, memo pad-read switch (see p. 56) or the memory transfer function (see p. 54).
4 FREQUENCY SETTING ■ Frequency setting with the tuning dial • For ham band use • For general coverage receiver use q Push the desired band key on the keypad 1–3 times. q Push [GENE] 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.) ANT 1 METER Po BW 2.4k SFT T X VFO TX qw:pp 0 USB BW 2.4k SFT T X VFO TX qw:pp 0 USB FIL2 qt.qpp.pp METER Po 21.076.50 1 FIL2 21.076.
4 FREQUENCY SETTING ■ Advanced tuning functions QUICK TUNING STEP The operating frequency can be changed in kHz steps (0.1, 1, 5, 9, 10, 12.5, 20 or 25 kHz selectable) for quick tuning. q Push [TS] momentarily to display the quick tuning indicator. SELECTING THE kHz STEP q Push [TS] momentarily to turn the quick tuning step ON. w Push [TS] for 1 sec. to enter the quick tuning step setting display. • Selected tuning steps for all modes appear. ANT 1 METER Po BW 2.
5 RECEIVE AND TRANSMIT ■ Mode selection The following modes are available in the IC756PROII: SSB (LSB/USB), CW, CW-R (CW reverse), RTTY, RTTY-R (RTTY reverse), AM and FM. Data modes of SSB, AM and FM are also available. See the diagram below for the order of selection. SSB USB-D USB CW-R CW AM-D AM LSB LSB-D RTTY RTTY-R FM FM-D CW/RTTY Microphone signals are muted when data mode is selected. To select a mode of operation, push the desired mode switch momentarily.
5 RECEIVE AND TRANSMIT ■ Notch function This transceiver has auto and manual notch functions. The auto notch function automatically attenuates more than 3 beat tones, tuning signals, etc., even if they are moving. The manual notch can be set to attenuate a frequency via the [NOTCH] control. While operating the manual notch, noise may be heard. This comes from the DSP unit and does not indicate an equipment malfunction.
RECEIVE AND TRANSMIT 5 ■ Noise blanker The noise blanker eliminates pulse-type noise such as from car ignitions. The noise blanker is not available for FM mode. [NB] switch Tuning dial q Push the [NB] switch to turn the noise blanker ON. • [NB] indicator lights. w Push the [NB] switch for 1 sec. to enter to the noise blanker level set mode. e Rotate the tuning dial to adjust the noise blanker level. • Push [(F-3)DEF] for 1 sec. to return to default value.
5 RECEIVE AND TRANSMIT ■ RTTY filter/Twin peak filter The transceiver has 5 RTTY filters in addition to normal IF filters. The passband width can be selected from 1 kHz, 500 Hz, 350 Hz, 300 Hz and 250 Hz. When the RTTY filter is turned ON, the RTTY tuning meter can be used. (p. 42) y Push [(F-2)Z] to select twin peak filter item. • The received audio volume may become greater when the twin peak filter is turned ON. u Rotate the tuning dial to turn the twin peak filter function ON or OFF.
RECEIVE AND TRANSMIT 5 ■ 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 filter set mode screen graphically displays the CW pitch operations. (See below.) The received CW audio pitch can be adjusted in 25 Hz steps. ■ IF filter selection The transceiver has 3 passband width IF filters for each mode.
5 RECEIVE AND TRANSMIT ■ AGC function The AGC (auto gain control) controls receiver gain to produce a constant audio output level even when the received signal strength is varied by fading, etc. The transceiver has 3 AGC characteristics (time constant; fast, mid, slow) for non-FM mode. The FM mode AGC time constant is fixed as ‘FAST’ (0.1 sec.) and AGC time constant cannot be selected. • Setting the AGC time constant q Select the desired mode except FM mode. w Push [AGC] for 1 sec. to enter AGC set mode.
RECEIVE AND TRANSMIT 5 ■ 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 circuit is selected for the main readout frequency. • Equalized receive frequency and “ DUAL-W ” appear in the LCD. This quick dualwatch function can be turned OFF in set mode. (p. 70) • Pushing [DUALWATCH] momentarily activates the dualwatch with the previously operated frequency. BW 2.
5 RECEIVE AND TRANSMIT ■ Split frequency operation Split frequency operation allows you to transmit and receive in the same mode on two different frequencies. The split frequency operation is basically performed using 2 frequencies on the main and sub readouts. Following is an example of setting 21.290 MHz for receiving and 21.310 MHz for transmitting. q Set 21.290 MHz (USB) in VFO mode. ANT 1 BW 2.4k SFT TX TX VFO qw:pp 0 USB FIL2 wq.wop.pp METER Po 14.100.00 1 P.AMP 1 VFO USB USB FIL2 14.
RECEIVE AND TRANSMIT 5 ■ Quick split function When you find a DX station, an important consideration is how to set the split frequency. When you push the [SPLIT] switch for 1 sec., split frequency 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. w Push [SPLIT] for 1 sec. • Split frequency operation is turned ON.
5 RECEIVE AND TRANSMIT ■ RIT and ∂TX • RIT function • ∂TX function The RIT function shifts the receive frequency up to ±9.999 kHz in 1 Hz steps (10 Hz steps when cancelling the 1 Hz step readout) without moving the transmit frequency. The ∂TX function shifts the transmit frequency up to ±9.999 kHz in 1 Hz steps (10 Hz steps when cancelling the 1 Hz step readout) without moving the receive frequency. • See #2 on p. 6 for function description. • See #3 on p. 6 for function description.
RECEIVE AND TRANSMIT 5 ■ Monitor function The monitor function allows you to monitor your transmit IF signals in any mode through the speaker. Use this to check voice characteristics while adjusting SSB transmit tones. (p. 66) The CW sidetone functions regardless of the [MONITOR] switch setting. [MONITOR] switch [PHONES] jack q Push [MONITOR]. • The indicator lights when the monitor function is ON. w Push [EXIT/SET] several times to close a multifunction screen, if necessary.
5 RECEIVE AND TRANSMIT ■ Meter function The transceiver has 4 transmit meter functions for your convenience. Select the desired meter with the [METER] switch. In addition, the transceiver can display the multi-function digital meter in the LCD display, which displays all transmit meters simultaneously. • Analog transmit meter • Multi-function digital meter ➥ Push [METER] to select RF power (Po), SWR, ALC or compression level (COMP) for transmit metering. q Push [METER] for 1 sec.
RECEIVE AND TRANSMIT 5 ■ Speech compressor The RF speech compressor increases average RF output power, improving signal strength and readability in SSB. y Push [METER] once to select the COMP meter. u Adjust the [COMP] control so that the COMP meter reads within 10 dB and 20 dB. COMP meter • Speech compressor q Select USB or LSB mode. w Push [COMP] momentarily to turn the speech compressor ON and OFF. e Push [COMP] for 1 sec. to toggle between narrow, middle or wide transmit filter.
5 RECEIVE AND TRANSMIT ■ Digital voice recorder The transceiver has a total of 8 memory channels, 4 each for transmit and receive, of digital voice memories. A maximum message of 15 sec. can be recorded in each receive channels, and total message of 90 sec. can be recorded in transmit channels. Providing a transmission memory is very convenient for repeated CQ and number transmissions at contest times, as well as when making consecutive calls in DX’pedition.
RECEIVE AND TRANSMIT 5 ■ Digital voice recorder (continued) • One-touch voice recording [REC/PLAY] switch To records the receiving signal contents immediately, one-touch voice recording is available. q Push [REC/PLAY] for 1 sec. during receiving a signal to start recording. • “REC” flashes. • Records audio into the channel R4. w Push [REC/PLAY] momentarily to stop recording. • Recording is automatically terminated after 30 min.
5 RECEIVE AND TRANSMIT ■ Digital voice recorder (continued) • Recording a message for transmit To transmit a message using a voice recorder, record the desired message in advance as described below. q Push [EXIT/SET] several times to close a multifunction screen, if necessary. w Push [(F-2)VOICE] to call up the voice recorder screen. r Push the desired memory channel switch, [(F-1)T1] – [(F-4)T4], momentarily to start playback and confirmation.
RECEIVE AND TRANSMIT 5 ■ Digital voice recorder (continued) • Sending a message for transmit • Transmit monitor function q Push [EXIT/SET] several times to close a multifunction screen, if necessary. w Select a phone mode by pushing [SSB] or [AM/FM]. e Push [(F-2)VOICE] to call up the voice recorder screen. The monitor function can be automatically turned ON while transmitting a voice memory message.
5 RECEIVE AND TRANSMIT ■ RTTY decoder The transceiver has an RTTY decoder for Baudot (mark freq.: 2125 Hz, shift freq.: 170 Hz, 45 bps). An external terminal unit (TU) or terminal node controller (TNC) is not necessary for receiving a Baudot signal. q Push [EXIT/SET] several times to close a multifunction screen, if necessary. w Push [CW/RTTY] to select RTTY mode. e Push [(F-3)DECODE] to turn the RTTY decoder ON. • RTTY decoder screen appears.
RECEIVE AND TRANSMIT 5 ■ 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. o Push [(F-2)√] to select the “Rise Time” item. KEYER CW-KEY AGC MID BK-IN OFF 1/4 OFF • Setting the electronic keyer q Push [EXIT/SET] several times, if necessary. w Push [CW/RTTY] to select CW mode.
5 RECEIVE AND TRANSMIT ■ 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 q Push [EXIT/SET] several times, if necessary. w Push [CW/RTTY] to select CW mode. e Push [(F-3)KEYER] then [EXIT/SET] to select keyer set mode. r Push [(F-2)EDIT] to enter the keyer edit screen.
RECEIVE AND TRANSMIT 5 ■ Spectrum scope screen This function allows you to display the relative strengths of signals around the center frequency. The span can be set to ±12.5 kHz, ±25 kHz, ±50 kHz and ±100 kHz. Ideal for monitoring band conditions in an instant. q Push [EXIT/SET] several times to close a multifunction screen, if necessary. w Push [(F-1)SCOPE] to select the scope screen. ANT 1 BW 2.4k SFT TX TX VFO qw:pp 0 USB FIL2 qr.qot.pp METER Po 14.100.00 1 P.AMP 1 VFO USB USB FIL2 qr.
5 RECEIVE AND TRANSMIT ■ Automatic antenna selection The transceiver covers 0.1–60 MHz over 10 bands. Each band key has a band memory which can memorize 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.
RECEIVE AND TRANSMIT 5 ■ 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 frequency by an offset frequency. A repeater can be accessed using split frequency operation with the shift frequency set to the repeater’s offset frequency. For accessing a repeater which requires a repeater tone, set the repeater tone frequency in set mode as described below.
5 RECEIVE AND TRANSMIT ■ Tone squelch operation The tone squelch opens only when receiving a signal containing a matching subaudible tone. You can silently wait for calls from group members using the same tone. q Push [VFO/MEMO] to select VFO mode. ANT 1 BW 2.4k SFT TX TX VFO qw:pp 0 USB FIL2 wq.wop.pp METER Po 14.100.00 1 P.AMP 1 VFO USB USB 14.100.00 1 15k SFT BW TX TX P.AMP 1 ATT OFF VFO VOX OFF USB qw:pp 0 FM FIL2 TSQL wo.yip.pp 14.100.00 1 VFO FM FIL2 USB TSQL wo.
RECEIVE AND TRANSMIT 5 ■ Antenna tuner operation The internal automatic antenna tuner matches the transceiver to the connected antenna automatically. Once the tuner matches an antenna, the variable capacitor angles are memorized as a preset point for each frequency range (100 kHz steps). Therefore, when you change the frequency range, the variable capacitors are automatically preset to the memorized point. TUNER OPERATION ➥ Push the [TUNER] switch to turn the internal antenna tuner ON.
5 RECEIVE AND TRANSMIT ■ Optional external tuner operation • AH-4/AH-3 HF AUTOMATIC ANTENNA TUNER The AH-4/AH-3 matches the IC-756PROII to a long wire antenna more than 3 m/10 ft long (3.5 MHz and above) or more than 12 m/40 ft long (1.8 MHz and above). • See p. 19 for the transceiver and AH-4/AH-3 connection. • See the AH-4/AH-3 instruction manual for AH-4/AH-3 installation and antenna connection details.
6 MEMORY OPERATION ■ Memory channels The transceiver has 101 memory channels. The memory mode is very useful for quickly changing to oftenused frequencies. All 101 memory channels are tuneable which means the programmed frequency can be tuned temporarily with the tuning dial, etc. in memory mode. MEMORY CHANNEL MEMORY CHANNEL NUMBER CAPABILITY TRANSFER TO VFO OVERWIRING CLEAR Regular memory channels 1–99 One frequency and one mode in each memory channel.
6 MEMORY OPERATION ■ Memory channel screen The memory channel screen simultaneously shows 7 memory channels and their programmed contents. 13 memory channels can be displayed in the wide memory channel screen. You can select a desired memory channel from the memory channel screen. • Selecting a memory channel using the memory channel screen q Push [EXIT/SET] several times to close a multifunction screen, if necessary. w Push [(F-4)MEMORY] to select the memory channel screen.
MEMORY OPERATION 6 ■ Memory channel programming Memory channel programming can be preformed either in VFO mode or in memory mode. • Programming in VFO mode q Set the desired frequency and operating mode in VFO mode. w Push [Y]/[Z] 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 channel readout (below the frequency readout). • “--.---.
6 MEMORY OPERATION ■ Frequency transferring The frequency and operating mode in a memory channel can be transferred to the VFO. • Transferring in VFO mode This is useful for transferring programmed contents to VFO. q Select VFO mode with [VFO/MEMO]. w Select the memory channel to be transferred with [Y]/[Z]. • Memory channel screen is convenient for selecting the desired channel. • Memory channel contents appear in the memory channel readout (below the frequency readout). • “--.---.
MEMORY OPERATION 6 ■ Memory names All memory channels (including scan edges) can be tagged with alphanumeric names of up to 10 characters each. r Push [(F-4)NAME] to edit memory channel name. • A cursor appears and blinks. • Memory channel names of blank channels cannot be edited. Capital letters, small letters, numerals, some symbols _ (! # $ % & ¥ ? " ’ ` ^ + – ✱ / . , : ; = < > ( ) [ ] { } | _ ) and spaces can be used. BW 2.4k SFT TX TX VFO • Editing (programming) memory names ANT 1 BW 2.
6 MEMORY OPERATION ■ Memo pads The transceiver has a memo pad function to store frequency 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.
7 SCANS ■ Scan types • 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. 31 for details. PROGRAMMED SCAN ∂F SCAN Repeatedly scans between two scan edge frequencies (scan edge memory channels P1 and P2). Repeatedly scans within ∂F span area. Scan edge P1 or P2 Scan edge P2 or P1 Start frequency –∂F frequency +∂F frequency Scan Scan Scan Jump Jump This scan operates in VFO mode.
7 SCANS ■ Programmed scan operation q Push [EXIT/SET] several times to close a multifunction screen, if necessary. w Select VFO mode. e Select the desired operating mode. • The operating mode can also be changed while scanning. r Push [(F-5)SCAN] to select the scan screen. ANT 1 BW 2.4k SFT TX TX METER Po VFO qw:pp 0 USB FIL2 14.100.00 P.AMP 1 VFO USB COMP OFF WIDE METER Po VFO qw:pp 0 USB FIL2 qr.qot.pp 14.100.00 1 P.AMP 1 VFO USB USB FIL2 qr.wpt.pp ATT OFF 14.100.
SCANS 7 ■ Fine programmed scan/fine ∂F scan Fine scan functions as programmed or ∂F scan, but scan speed decreases when the squelch opens but does not stop. The scanning tuning step shifts from 50 Hz to 10 Hz while the squelch opens. q Push [EXIT/SET] several times to close a multifunction screen, if necessary. w Push [(F-5)SCAN] to select the scan screen. e Set for programmed scan or ∂F scan as described on previous page. r Push [(F-1)PROG] or [(F-2)∂F] to start a scan.
7 SCANS ■ Select memory scan operation q Push [EXIT/SET] several times to close a multifunction screen, if necessary. w Select memory mode. e Push [(F-5)SCAN] to select the scan screen. ANT 1 BW 2.4k SFT 12 TX TX METER Po P.AMP 1 USB USB VOX OFF COMP OFF WIDE Span : Programmed scan edges ∂F MEMO P1: P2: ± COMP OFF WIDE 10kHz 0.500.00MHz 29.999.99MHz qr.wpt.pp 14.100.
SCANS 7 ■ Scan set mode Scan set mode is used for programming scanning speed and scan resume condition. • Scan speed The transceiver has 2 speeds for scanning, high and low. q Push [EXIT/SET] several times to close a multifunction screen, if necessary. w Push [(F-5)SCAN] to select the scan screen. ANT 1 BW 2.4k SFT TX TX METER Po VFO FIL2 qr.qot.
7 SCANS ■ Tone scan The transceiver can detect the subaudible tone frequency in a received signal. By monitoring a signal that is being transmitted on a repeater input frequency, you can determine the tone frequency required to access the repeater. q Set the desired frequency or memory channel to be checked for a tone frequency. w Push [AM/FM] several times to select FM mode. e Push [TONE] for 1 sec. to enter the tone frequency screen. VOX OFF REPEATER TONE 88.5Hz T-SQL TONE 88.
CLOCK AND TIMERS 8 ■ 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]. q Push [EXIT/SET] several times to close a multifunction screen, if necessary. w Push [EXIT/SET] for 1 sec. then [(F-4)TIME] to enter timer set mode. e Push [(F-1)Y] to select the Time (Now) item. r Set the current time using the tuning dial.
8 CLOCK AND TIMERS ■ Setting power-on time The transceiver can be set to turn ON automatically at a specified time. q Push [EXIT/SET] several times to close a multifunction screen, if necessary. w Push [EXIT/SET] for 1 sec. then [(F-4)TIME] to enter timer set mode. e Push [(F-1)Y] or [(F-2)Z] to select the Power-ON Timer Set item. r Set the desired power-on time using the tuning dial. • “TIMER–set Push [SET]” blinks.
9 SET MODE ■ Set mode description t Push [(F-1)Y] or [(F-2)Z] to select the desired item. y Set the desired condition using the tuning dial. Set mode is used for programming infrequently changed values or conditions of functions. This transceiver has a level set mode, display set mode, timer set mode and miscellaneous (others) set mode. • Push [(F-3)DEF] for 1 sec. to select a default condition or value. u For timer set mode, push [(F-4)SET] to enter the set time.
9 SET MODE ■ Level set mode SSB Tx Tone (Bass) This item adjusts the bass level of the transmit audio tone in SSB mode from –5 dB to +5 dB in 1 dB steps. 0dB 0 dB (default) SSB Tx Tone (Treble) This item adjusts the treble level of the transmit audio tone in SSB mode from –5 dB to +5 dB in 1 dB steps. 0dB 0 dB (default) Monitor Level This item adjusts the transmit IF signal monitor level from 0% to 100% in 1% steps. 50% 50% (default) See p. 35 for details.
SET MODE 9 ■ Display set mode 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. Contrast (LCD) 60% This item adjusts the contrast of the LCD from 0% to 100% in 1% steps. 60% (default) Backlight (LCD) 50% This item adjusts the brightness of the LCD from 0% to 100% in 1% steps.
9 SET MODE ■ Display set mode (continued) My Call Your call sign, etc. can be displayed in the opening screen when turning power ON. Up to 10 characters can be programmed. Capital letters, numerals, some symbols (– / . ) and spaces can be used. q Push [EXIT/SET] several times to close a multifunction screen, if necessary. w Push [EXIT/SET] for 1 sec. then [(F-2)DISP] momentarily to select the display set mode screen. e Push [(F-2)Z] several times to select the ‘My Call’ item.
SET MODE 9 ■ Timer set mode Time (Now) 15:00 This item sets the current time for the built-in 24-hour clock. Push [(F-4)SET] to enter the time. See p. 63 for details. Timer Function This item sets the timer functions ON and OFF. When the power-ON timer or the power-OFF timer is used, “ON” muset be selected in this item. See p. 63 for details. ON OFF The timer functions can be The timer functions cannot operated. (default) be operated. Power-ON timer set This item sets the power-on time. See p.
9 SET MODE ■ Miscellaneous (others) set mode Calibration Marker This item is used for a simple frequency check of the transceiver. ON OFF Calibration marker ON Calibration marker OFF (default) ON OFF Confirmation beep ON (default) Confirmation beep OFF ON OFF Band edge beep ON (default) Band edge beep OFF See p. 79 for calibration procedure. Turn the calibration marker OFF after checking the frequency of the transceiver.
SET MODE 9 ■ Miscellaneous (others) set mode (continued) FM SPLIT Offset(HF) This item sets the offset (difference between transmit and receive frequencies) for the quick split function. However, this setting is used for HF bands in FM mode only and is used to input the repeater offset for an HF band. -0.100MHz -4.000MHz Minus 0.1 MHz offset (default) Minus 4.0 MHz offset -0.500MHz +4.000MHz Minus 0.5 MHz offset (default) Plus 4.
9 SET MODE ■ Miscellaneous (others) set mode (continued) [ANT] Switch You can set the antenna connector selection to automatic, manual or non-selection (when using 1 antenna only). When “Auto” is selected, the antenna switch is activated and the band memory memorizes the selected antenna. See p. 46 for details. Auto Antenna switch is activated and the selection is automatically memorized. (default) Manual Antenna switch is activated. OFF Antenna switch is deactivated and [ANT1] is always selected.
SET MODE 9 ■ Miscellaneous (others) set mode (continued) RTTY Decode New Line Code This item selects the new line code of the internal RTTY decoder. See p. 42 for details. CR : Carriage Return LF : Line Feed CR,LF,CR+LF CR+LF CR, LF and CR+LF (default) CR+LF only SPEECH Language When the optional UT-102 VOICE SYNTHESIZER UNIT is installed, you can select between English and Japanese as the language.
9 SET MODE ■ Miscellaneous (others) set mode (continued) MIC Up/Down Speed This item sets the rate at which frequencies are scanned when the microphone [UP]/[DN] switches are pushed and held. High or low can be selected. HIGH LOW High speed (default, 50 tuning steps/sec.) Low speed (25 tuning steps/sec.) ON OFF Quick RIT/∂TX Clear This item selects the RIT/∂TX frequnecy clearing instruction with the [CLEAR] switch.
SET MODE 9 ■ Miscellaneous (others) set mode (continued) CI-V Baud Rate This item sets the data transfer rate. 300, 1200, 4800, 9600, 19200 bps and “Auto” are available. When “Auto” is selected, the baud rate is automatically set according to the connected controller or remote controller. Auto 19200 Auto baud rate (default) 19200 bps CI-V Address To distinguish equipment, each CI-V transceiver has its own Icom standard address in hexadecimal code. The IC-756PROII’s address is 64h.
10 OPTION INSTALLATION ■ 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 electric shock and/or equipment damage. q Remove 2 screws from the left side of the transceiver to remove the carrying handle as shown below.
MAINTENANCE 11 ■ Troubleshooting The following chart is designed to help you correct problems which are not equipment malfunctions. POWER PROBLEM 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. POSSIBLE CAUSE p. 17 • Re-connect the DC power cable correctly. • Check for the cause, then replace the fuse with p. 78 the spare one. (Fuses are installed in the DC power cable and the internal PA unit.
11 MAINTENANCE DISPLAY PROBLEM POSSIBLE CAUSE SOLUTION The displayed frequency • The dial lock function is activated. does not change properly. • A set mode screen is selected. • The internal CPU has malfunctioned. ■ Fuse replacement REF. • Push [LOCK/SPEECH] to turn the function OFF. p. 6 • Push [EXIT/SET] several times to exit the set pgs. 11, mode screen. 65 • Reset the CPU. p.
MAINTENANCE 11 ■ 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 counterclockwise to obtain a comfortable tension level while turning the dial continuously and evenly in one direction.
12 INTERNAL VIEW • Top view PA unit PA fuse (FGB 5 A) Internal antenna tuner FILTER unit • Bottom view RF unit Clock backup battery SPCH Optional voice synthesizer level adj.
CONTROL COMMAND 13 ■ Remote jack (CI-V) information • CI-V connection example The transceiver can be connected through an optional CT-17 CI-V LEVEL CONVERTER to a personal computer equipped with an RS-232C port. The Icom Communications Interface-V (CI-V) controls the following functions of the transceiver. IC-756PROII 9–15 V DC Up to 4 Icom CI-V transceivers or transceivers can be connected to a personal computer equipped with an RS-232C port. See p. 75 for setting the CI-V condition using set mode.
13 CONTROL COMMAND • Command table Command — 01 Same as command 06 02 — Description Send mode data — Read operating frequency — Read operating mode 05 — Set frequency data 00 01 02 03 04 05 07 08 Set LSB Set USB Set AM Set CW Set RTTY Set FM Set CW-R Set RTTY-R — B0 B1 C0 C1 D0 D1 Select VFO mode Exchange main and sub readouts Equalize main and sub readouts Turn the dualwatch OFF Turn the dualwatch ON Select main readout Select sub readout 08 — 0001–0101*1 09 — Memory write — Memor
SPECIFICATIONS • General 14 • Receiver • Frequency coverage USA and Rx others Tx Europe (#23) Rx Tx France (#24) Rx/Tx Italy (#28) Rx/Tx Spain (#30) Rx/Tx : 0.030–60.000*1*2 1.800– 1.999*2 7.000– 7.300*2 14.000–14.350*2 21.000–21.450*2 28.000–29.700*2 0.030–29.999* 1.800– 1.850 7.000– 7.100 14.000–14.350 21.000–21.450 28.000–29.700 1.810– 1.850 7.000– 7.100 14.000–14.350 21.000–21.450 28.000–29.700 1.830– 1.850 7.000– 7.100 14.000–14.350 21.000–21.450 28.000–29.700 1.830– 1.850 7.000– 7.100 14.
15 OPTIONS IC-PW1 HF/50 MHz ALL BAND 1 kW LINEAR AMPLIFIER PS-125 DC POWER SUPPLY 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 supply unit and the remote control unit are separated. Light weight switching regulator system power supply. AH-4 HF/50 MHz AUTOMATIC ANTENNA TUNER SM-20 DESKTOP MICROPHONE AH-2b ANTENNA ELEMENT • Output voltage: 13.8 V DC • Max.
ABOUT CE 16 INSTALLATION NOTES For amateur base station installations it is recommended that the forwards clearance in front of the antenna array is calculated relative to the EIRP (Effective Isotropic Radiated Power). The clearance height below the antenna array can be determined in most cases from the RF power at the antenna input terminals. As different exposure limits have been recommended for different frequencies, a relative table shows a guideline for installation considerations.
IC-756PROII #23 ■ GER ■ NED ■ ITA ■ AUT ■ BEL ■ GRE ■ GBR ■ LUX ■ SWE ■ IRL ■ ESP ■ DEN ■ FRA ■ POR ■ FIN IC-756PROII #24 ■ GER ■ NED ■ ITA ■ AUT ■ BEL ■ GRE ■ GBR ■ LUX ■ SWE ■ IRL ■ ESP ■ DEN ■ FRA ■ POR ■ FIN IC-756PROII #28 ■ GER ■ NED ■ ITA ■ AUT ■ BEL ■ GRE ■ GBR ■ LUX ■ SWE ■ IRL ■ ESP ■ DEN ■ FRA ■ POR ■ FIN IC-756PROII #30 ■ GER ■ NED ■ ITA ■ AUT ■ BEL ■ GRE ■ GBR ■ LUX ■ SWE ■ IRL ■ ESP ■
