Icom IC-756PRO3 User Manual

INSTRUCTION MANUAL

HF/50 MHz
ALL MODE TRANSCEIVER

This device complies with Part 15 of the FCC rules. Operation is sub­ject to the following two conditions: (1) This device may not cause
harmful interference, and (2) this device must accept any interference
received, including interference that may cause undesired operation.

i

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-756PROIII.

EXPLICIT DEFINITIONS

WORD DEFINITION

RR

WARNING

Personal injury, fire hazard or electric
shock may occur.

CAUTION Equipment damage may occur.

NOTE

If disregarded, inconvenience only. No
risk or personal injury, fire or electric
shock.

Icom, Icom Inc. and the are registered trademarks of
Icom Incorporated (Japan) in the United States, the United
Kingdom, Germany, France, Spain, Russia and/or other
countries.

We understand that you have a choice of many differ­ent radios in the market place. We would like to take a
couple of moments of your time to thank you for mak­ing your IC-756PROIII your radio of choice, and hope
you agree with Icom’s philosophy of “technology first.”
Many hours of research and development went into
the design of your IC-756PROIII.

D

FEATURES

❍ +30 dBm class IP3 (at 14 MHz band) and

further improved 3rd order IMD character­istics

❍ Real time spectrum scope with mini-scope

function

❍ Boudot RTTY demodulator and RTTY

transmit message memory

❍ Selectable SSB transmission passband

width (Each for Higher and lower pass fre­quency)

❍ Digital IF filter allows you to select 51 types

of filter shapes while receiving a station

The transceiver comes with the following acces­sories.

Qty.

q DC power cable (OPC-025D) .......................... 1

w Hand microphone (HM-36) .............................. 1

e Spare fuses (FGB 30 A) .................................. 2

r Spare fuse (FGB 5 A) ...................................... 1

t CW keyer plug (AP-330) .................................. 1

qwe

r

t

Spurious may be received near the following frequencies.
These are made in the internal circuit and does not indicate a
transceiver malfunction:

6.144 MHz, 8.000 MHz,

12.288 MHz, 12.890 MHz (when spectrum scope is ON),

18.433 MHz, 24.573 MHz, 52 MHz

FOREWORD SUPPLIED ACCESSORIES

ii

R WARNING RF EXPOSURE! This device

emits Radio Frequency (RF) energy. Extreme caution
should be observed when operating this device. If you
have any questions regarding RF exposure and safety
standards please refer to the Federal Communications
Commission Office of Engineering and Technology’s
report on Evaluating Compliance with FCC Guidelines
for Human Radio Frequency Electromagnetic Fields
(OET Bulletin 65).

R WARNING HIGH VOLTAGE! NEVER at-

tach an antenna or internal antenna connector during
transmission. This may result in an electrical shock or
burn.

RWARNING! NEVER operate the transceiver

with a headset or other audio accessories at high vol­ume levels. Hearing experts advise against continuous
high volume operation. If you experience a ringing in
your ears, reduce the volume or discontinue use.

RCAUTION! NEVER change the internal settings

of the transceiver. This result in reduced transceiver
performance and/or damage to the transceiver.

In particular, incorrect settings for transmitter circuits,
such as output power, idling current, etc., might dam­age the expensive final devices.

The transceiver warranty does not cover any problems
caused by unauthorized internal adjustment.

R NEVER apply AC to the [DC13.8V] jack on the

transceiver rear panel. This could cause a fire or ruin
the transceiver.

RNEVER apply more than 16 V DC, such as a 24 V

battery, to the [DC13.8V] jack on the transceiver rear
panel. This could cause a fire or ruin the transceiver.

RNEVER let metal, wire or other objects touch any

internal part or connectors on the rear panel of the
transceiver. This may result in an electric shock.

R NEVER expose the transceiver to rain, snow or

any liquids.

RNEVER installing the transceiver in a place with-

out adequate ventilation. Heat dissipation may be af­fected, and the transceiver may be damaged.

RNEVER operate or touch the transceiver with wet

hands. This may result in an electric shock or damage
to the transceiver.

AVOID using or placing the transceiver in areas with
temperatures below –10°C (+14°F) or above +50°C
(+122°F). Be aware that temperatures on a vehicle’s
dashboard can exceed 80°C (+176°F), resulting in per­manent damage to the transceiver if left there for ex­tended periods.

AVOID placing the transceiver in excessively dusty en­vironments or in direct sunlight.

AVOID placing the transceiver against walls or putting
anything on top of the transceiver. This will obstruct
heat dissipation.

Place unit in a secure place to avoid inadvertent use
by children.

During mobile operation, DO NOT operate the trans­ceiver 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 mag­netic navigation compass to prevent erroneous indica­tions.

BE CAREFUL! The heatsink will become hot when op­erating the transceiver continuously for long periods.

BE CAREFUL! If a linear amplifier is connected, set
the transceiver’s RF output power to less than the lin­ear amplifier’s maximum input level, otherwise, the lin­ear amplifier will be damaged.

The LCD display may have cosmetic imperfections
that appear as small or dark spots. This is not a mal­function or defect, but a normal characteristic of LCD
displays.

Use Icom microphones only (supplied or optional).
Other manufacturer’s microphones have different pin
assignments, and connection to the IC-756PROIII may
damage the transceiver.

For U.S.A. only

CAUTION: Changes or modifications to this device,

not expressly approved by Icom Inc., could void your
authority to operate this device under FCC regulations.

PRECAUTIONS

iii

TABLE OF CONTENTS

IMPORTANT .................................................................. i

FOREWORD ................................................................. i

EXPLICIT DEFINITIONS ............................................... i

SUPPLIED ACCESSORIES .......................................... i

PRECAUTIONS ............................................................ ii

TABLE OF CONTENTS .............................................. iii

1PANEL DESCRIPTION ..................................... 1–12

■ Front panel ....................................................... 1

■ LCD display ..................................................... 9

■ Screen menu arrangement ............................ 10

■ Rear panel ...................................................... 11

■ Microphone (HM-36) ...................................... 12

2 INST ALLATION AND CONNECTIONS .......... 13–20

■ Unpacking ...................................................... 13

■ Selecting a location ........................................ 13

■ Grounding ...................................................... 13

■ Antenna connection ....................................... 13

■ Required connections .................................... 14

■ Advanced connections ................................... 15

■ Power supply connections ............................. 16

■ Linear amplifier connections .......................... 17

■ External antenna tuner

connections .................................................... 18

■ Transverter jack information .......................... 18

■ Microphone connector information ................ 18

■ FSK and AFSK (SSTV)

connections .................................................... 19

■ Accessory connector information ................... 20

3 BASIC OPERATION ....................................... 21–32

■ When first applying power

(CPU resetting) .............................................. 21

■ Initial settings ................................................. 21

■ VFO description ............................................. 22

■ Selecting VFO/memory mode ........................ 23

■ Main/Sub band selection ............................... 23

■ Selecting an operating band .......................... 24

DUsing the band stacking registers ............... 24

■ Frequency setting .......................................... 25

DTuning with the tuning dial ........................... 25

DDirect frequency entry with the keypad ....... 25

DQuick tuning step ......................................... 26

DSelecting “kHz” step .................................... 26

DSelecting 1 Hz step...................................... 27

D1⁄4 tuning function

(SSB data/CW/RTTY only) .......................... 27

DAuto tuning step function ............................. 28

DBand edge warning beep............................. 28

■ Operating mode selection .............................. 29

■ Volume setting ............................................... 29

■ Squelch and receive (RF) sensitivity ............. 30

■ Meter function ................................................ 31

■ SWR reading ................................................. 31

■ Basic transmit operation ................................ 32

DTransmitting ................................................. 32

DMicrophone gain adjustment ....................... 32

4 RECEIVE AND TRANSMIT ............................ 33–54

■ Operating SSB ............................................... 33

DConvenient functions for receive ................. 33

DConvenient functions for transmit ................ 34

DAbout 5 MHz band operation

(USA version only)....................................... 34

■ Operating CW ................................................ 35

DConvenient functions for receive ................. 35

DConvenient functions for transmit ................ 36

DAbout CW reverse mode ............................. 36

DCW side tone function ................................. 36

DAbout CW pitch control ................................ 37

■ Electronic CW keyer ...................................... 38

DMemory keyer send screen ......................... 39

DEditing a memory keyer ............................... 40

DContest number set mode ........................... 41

DKeyer set mode ........................................... 42

■ Operating RTTY (FSK) .................................. 44

DConvenient functions for receive ................. 44

DAbout RTTY reverse mode .......................... 45

DRTTY filter/Twin peak filter........................... 45

DFunctions for the RTTY decoder indication . 46

DSetting the decoder threshold level ............. 46

DRTTY memory transmission ........................ 47

DRTTY tuning meter ...................................... 47

DEditing RTTY memory ................................. 48

DRTTY decoder set mode.............................. 49

■ Operating AM ................................................. 50

DConvenient functions for receive ................. 50

DConvenient functions for transmit ................ 50

■ Operating FM ................................................. 51

DConvenient functions for receive ................. 51

DConvenient functions for transmit ................ 51

■ Repeater operation ........................................ 52

DSetting the repeater tone ............................. 52

■ Tone squelch operation .................................. 53

■ Data mode (SSTV/PSK31) operation ............ 54

5 FUNCTION FOR RECEIVE ............................ 55–65

■ Spectrum scope screen ................................. 55

DMini scope screen........................................ 55

DScope set mode........................................... 56

■ Preamplifier .................................................... 57

■ Attenuator ...................................................... 57

■ RIT function .................................................... 58

■ AGC function .................................................. 59

■ Twin PBT operation ........................................ 60

■ IF filter selection ............................................. 61

■ DSP filter shape.............................................. 62

■ Dualwatch operation ...................................... 63

■ Noise blanker ................................................. 64

■ Notch function ................................................ 64

■ Noise reduction .............................................. 65

■ Dial lock function ............................................ 65

iv

TABLE OF CONTENTS

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19

6 FUNCTION FOR TRANSMIT ......................... 66–72

■ VOX function .................................................. 66

DUsing the VOX function ............................... 66

DAdjusting the VOX function.......................... 66

■ Break-in function ............................................ 67

DSemi break-in operation .............................. 67

DFull break-in operation ................................. 67

■ Transmit filter width setting (SSB only) .......... 68

■ Speech compressor ....................................... 68

■ ∂TX function .................................................. 69

■ Monitor function ............................................. 70

■ Split frequency operation ............................... 71

■ Quick split function ......................................... 72

7 VOICE RECORDER FUNCTIONS ................. 73–76

■ Digital voice recorder ..................................... 73

8 MEMORY OPERATION .................................. 77 – 82

■ Memory channels .......................................... 77

■ Memory channel selection ............................. 77

■ Memory channel screen ................................ 78

■ Memory channel programming ...................... 79

■ Frequency transferring ................................... 80

■ Memory names .............................................. 81

■ Memory clearing ............................................ 81

■ Memo pads .................................................... 82

9 SCANS ........................................................... 83–87

■ Scan types ..................................................... 83

■ Preparation .................................................... 83

■ Programmed scan operation ......................... 84

■ ∂F scan operation ......................................... 84

■ Fine programmed scan/

fine ∂F scan ................................................... 85

■ Memory scan operation ................................. 85

■ Select memory scan operation ...................... 86

■ Setting select memory channels .................... 86

■ Scan set mode ............................................... 87

■ Tone scan ....................................................... 87

10 ANTENNA TUNER OPERATION ................... 88–90

■ Automatic antenna selection .......................... 88

■ Antenna tuner operation ................................ 89

■ Optional external tuner operation .................. 90

11 CLOCK AND TIMERS .................................... 91–93

■ Time set mode ............................................... 91

DSetting the current time ............................... 92

DClock2 function activity ................................ 92

DClock2 offset setting .................................... 92

DTimer function activity .................................. 92

DSetting power-on time.................................. 93

DSetting power-off period............................... 93

DTimer operation............................................ 93

12 SET MODE ................................................... 94–104

■ Set mode description ..................................... 94

■ Level set mode .............................................. 95

■ Display set mode ........................................... 97

■ DSP filter set mode......................................... 99

■ Miscellaneous (others) set mode ................... 99

13 OPTION INSTALLATION .................................... 105

■ Opening the transceiver’s case ................... 105

■ UT-102

VOICE SYNTHESIZER UNIT

.................. 105

14 INTERNAL VIEWS .............................................. 106

15 MAINTENANCE ......................................... 107–109

■ Troubleshooting ........................................... 107

■ Fuse replacement ........................................ 108

■ Clock backup battery

replacement ................................................. 108

■ Tuning dial brake adjustment ....................... 109

■ Frequency calibration

(approximate)................................................ 109

16 CONTROL COMMAND ............................... 110– 114

■ Remote jack (CI-V) information .................... 110

17 SPECIFICATIONS ............................................... 115

18 OPTIONS ............................................................. 116

19 ABOUT CE ........................................................... 117

1

1

PANEL DESCRIPTION

■ Front panel

q POWER SWITCH [POWER•TIMER]

❍ While transceiver’s power is OFF:

Push to turn power ON.

•Turn the optional DC power supply ON in advance.

•A/D converter calibration of the DSP unit starts and it
takes approx. 10 sec.

❍ While transceiver’s power is ON:

➥ Push momentarily to toggle the timer function

ON and OFF. (p. 93)

•The [TIMER] indicator in this switch lights while

the timer function is ON.

➥ Push for 1 sec. to turn power OFF.

w TRANSMIT SWITCH [TRANSMIT]

Selects transmitting or receiving.

•The [TX] indicator lights red while transmitting and the
[RX] indicator lights green when the squelch is open.

e HEADPHONE JACK [PHONES]

Accepts headphones.

• Output power: 5 mW with an 8 Ω load.

•When headphones are connected, the internal speaker
or connected external speaker does not function.

r ELECTRONIC KEYER JACK [ELEC-KEY]

Accepts a paddle to activate the internal electronic
keyer for CW operation. (p. 38)

•Selection between the internal electronic keyer, bug-key
and straight key operation can be made in keyer set
mode. (p. 43)

•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. 43)

•4-channel memory keyer is available for your conve­nience. (p. 40)

t MICROPHONE CONNECTOR [MIC]

Accepts the supplied or optional microphone.

•See p. 116 for appropriate microphones.

•See p. 18 for microphone connector information.

y AF CONTROL [AF] (inner control)

Varies the audio output level from the speaker.

u MIC GAIN CONTROL [MIC GAIN]

Adjusts microphone input gain.

•The transmit audio tone in SSB mode can be adjusted in
set mode. (p. 95)

✔

How to set the microphone gain.

Set the [MIC] control so that the ALC meter sometimes
swings during normal voice level transmission in SSB mode.

MIC GAIN

Recommended level for
an Icom microphone

Increases

Decreases

MIC GAIN

AF RF/SQL

No audio output

Max. audio output

Decreases Increases

(dot)
(com)
(dash)

!0!1!2

q

TIMER

POWER

TRANSMIT

HF/50MHz TRANSCEIVER

w

PHONES

TUNER MONITOR NB NR

e

ELEC-KEY

AF BAL NRRF/SQL

r

MIC

t

MIC GAIN RF POWER COMP BK-IN DELAY KEY SPEED

yiou

F-1 F-2 F-3 F-4 F-5

SSB

CW/RTTY

AM/FM FILTER EXIT/SET

2

1

PANEL DESCRIPTION

1

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.

•The control can be set as ‘Auto’ (RF gain control in SSB,
CW and RTTY; squelch control in AM and FM) or
squelch control (RF gain is fixed at maximum) in set
mode as follows. (p. 99)

•When setting as RF gain/squelch control

•When functioning as RF gain control

(Squelch is fixed open; SSB, CW, RTTY only)

•When functioning as squelch control

(RF gain is fixed at maximum.)

While rotating the RF gain control, noise may be
heard. This comes from the DSP unit and does not
indicate an equipment malfunction.

o RF POWER CONTROL [RF POWER]

Continuously varies the RF output power from min­imum

(5 W*) to maximum (100 W*).

* AM mode: 5 W to 40 W

!0 S/RF METER (p. 31)

Shows the signal strength while receiving. Shows
the relative output power, SWR, ALC or compres­sion levels while transmitting.

!1 MONITOR SWITCH [MONITOR] (p. 70)

Monitors your transmitted IF signal.

•The CW side tone functions regardless of the [MONI-
TOR] switch setting in CW mode.

•The [MONITOR] indicator in this switch lights green
when the function is activated.

!2 ANTENNA TUNER SWITCH [TUNER] (p. 89)

➥ Turns the internal antenna tuner ON and OFF

(bypass)

when pushed momentarily.

➥ Tunes the antenna manually when pushed for 1

sec.

•The [TUNER] indicator in this switch lights red when

the function is activated or blinks during manual tun­ing.

•When the tuner cannot tune the antenna, the tuning
circuit is bypassed automatically after 20 sec.

Increases
max. 100 W
(40 W for AM)

Decreases

min. 5 W

RF POWER

MODE

SSB, CW

RTTY

AM, FM

RF GAIN

SET MODE SETTING

AUTO

SQL

SQL

SQL
SQL

RF GAIN + SQL

RF GAIN + SQL
RF GAIN + SQL

Noise squelch (FM mode)

Squelch is
open.

RF gain
adjustable
range

Recommended level

Maximum
RF gain

S-meter
squelch

Maximum
RF gain

Adjustable
range

Minimum RF gain

Noise squelch
threshold
(FM mode)

Squelch is
open.

Noise squelch (FM mode)

S-meter squelch
threshold

S-meter
squelch

Shallow Deep

3

1

PANEL DESCRIPTION

■ Front panel (continued)

!3 COMPRESSION LEVEL CONTROL [COMP]

(p. 68)
Adjusts the speech compression level in SSB.

!4 SEMI BREAK-IN DELAY CONTROL

[BK-IN DELAY]

Adjusts the transmit-to-receive switching delay time
for CW semi break-in operation.

!5 ELECTRONIC CW KEYER SPEED CONTROL

[KEY SPEED] (p. 35)

Adjusts the internal electronic CW keyer’s speed.

•6 wpm (min.) to 60 wpm (max.) can be set.

!6 MULTI-FUNCTION SWITCHES

Push to select the functions indicated in the LCD
display to the right of these switches.

•Functions vary depending on the operating condition.

➥ Selects the antenna connector between

ANT1 and ANT2 when pushed. (p. 88)

➥ Turns the [RX ANT] (receive antenna) ON

and OFF when pushed for 1 sec.

•When the receive antenna is activated, the

antenna which is connected to the [ANT1] or
[ANT2] is used for transmission only.

When a transverter is in use, this [ANT]
does not function and ‘XVERT’ appears.

➥ Selects RF power

(Po), SWR, ALC or

COMP metering during transmit. (p. 31)

➥ Switches the multi-function digital meter

ON and OFF when pushed for 1 sec.

➥ Selects one of 2 receive RF preamps or

bypasses them. (p. 57)

•“P. AMP1” activates 10 dB preamp.

•“P. AMP2” activates 16 dB high-gain preamp.

✔

What is the preamp?

The preamp amplifies received signals in the front end cir­cuit to improve the S/N ratio and increase the sensitivity. Se­lect “P. AMP1” or “P. AMP2” when receiving weak signals.

➥ Selects 6 dB, 12 dB or 18 dB attenuator,

or bypasses them. (p. 57)

✔

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 broadcast­ing station, are near your location.

ATT
OFF

P.AMP

OFF

METER

Po

ANT

!6!7!8@0 !9

TIMER

POWER

TRANSMIT

PHONES

ELEC-KEY

MIC

HF/50MHz TRANSCEIVER

TUNER MONITOR NB NR

AF BAL NRRF/SQL

MIC GAIN RF POWER COMP BK-IN DELAY KEY SPEED

!5!4!3

Compression

Compression
level decreases

level increases

COMP

Long delay for
slow speed keying

Short delay for
high speed keying
(2 dot)

BK-IN DELAY

(13 dot)

Fast

Slow

KEY SPEED

F-1 F-2 F-3 F-4 F-5

SSB

CW/RTTY

AM/FM FILTER EXIT/SET

ANT

1

METER

Po

P.AMP

OFF

ATT
OFF

4

1

PANEL DESCRIPTION

1

➥ Activates or selects fast, middle or slow

AGC time constant when pushed. (p. 59)

•“FAST” is only available for FM mode.

➥ Enters the AGC set mode when pushed

for 1 sec. (p. 59)

AGC time constant can be set between 0.1 to

8.0 sec.

(depends on mode), or turned OFF. While

“OFF” is selected, the S-meter does not function.

✔

What is the AGC?

The AGC function controls receiver gain to produce a con­stant audio output level, even when the received signal
strength is varied by fading, etc. Select “FAST” for tuning and
select “MID” or “SLOW” depending on the receiving condi­tion.

➥ Turns the VOX function ON and OFF

when pushed in a phone mode (SSB, AM
or FM mode). (p. 66)

➥ Enters the VOX set mode when pushed

for 1 sec. in a phone mode. (p. 66)

✔

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, automatically re­turns to receive when you stop speaking.

➥ Selects semi break-in, full break-in oper-

ation, or turns the break-in operation
OFF when pushed in CW mode. (p. 67)

✔

What is the break-in function?

The break-in function switches transmit and receive with CW
keying. Full break-in function (QSK) can monitor the receive
signal during keying.

➥ Turns the RTTY filter ON and OFF in

RTTY mode. (p. 45)

•When the RTTY filter is turned ON, [TWIN
PBT] functions as the IF shift control.

➥ Enters the RTTY filter set mode when

pushed for 1 sec. in RTTY mode. (p. 45)

✔

What is the IF shift?

The IF shift function electronically changes the center of the
IF (Intermediate Frequency) passband frequency to reject in­terference. Only the inner control of [TWIN PBT] can be
used for the IF shift control.

➥ Turns the speech compressor ON and

OFF in SSB mode. (p. 68)

➥ Switches the narrow, middle or wide

transmit filter when pushed for 1 sec.

✔

What is the speech compressor?

The speech compressor compresses the transmitter audio
input to increase the average audio output level. Therefore,
talk power is increased. This function is effective for long dis­tance communication or when propagation conditions are
poor.

➥ Turns the 1⁄4 function ON and OFF in

SSB data, CW and RTTY modes. (p. 27)

•1⁄4 function sets dial rotation to 1⁄4 of normal

for fine tuning.

➥ Switches the tone encoder, tone squelch

function and no tone operation when
pushed in FM mode. (pgs. 52, 53)

➥ Enters the tone set mode when pushed

for 1 sec. in FM mode. (pgs. 52, 53)

!7 NOISE REDUCTION LEVEL CONTROL [NR]

(outer control; p. 65)
Adjusts the noise reduction level when the noise re­duction is in use. Set for maximum readability.

•To activate this control, turn the noise reduction ON in

advance (!8).

!8 NOISE REDUCTION SWITCH [NR] (p. 65)

Push to switch the noise reduction ON and OFF.

•The [NR] indicator in this switch lights green when the

function is activated.

!9 NOISE BLANKER SWITCH [NB] (p. 64)

➥ Switches the noise blanker ON and OFF when

pushed. The noise blanker reduces pulse-type
noise such as that generated by automobile igni­tion systems. This function cannot be used for
FM mode, or non-pulse-type noise.

•The [NB] indicator in this switch lights green when the

function is activated.

➥ Enters the noise blanker level set mode when

pushed for 1 sec.

@0 BALANCE CONTROL [BAL] (inner control; p. 63)

Adjusts the audio output balance between main and
sub readout frequencies while in dualwatch.

BAL NR

Increases main
readout gain

Increases sub
readout gain

Noise blanker OFF Noise blanker ON

NB NB

Noise reduction OFF Noise reduction ON

NR NR

BAL NR

Decreases

OFF

Increases

TONE

OFF
1/4
OFF

COMP

OFF

WIDE

RTTY

FIL
OFF

BK-IN

OFF

VOX
OFF

AGC
MID

AGC
MID

VOX
OFF

1/4
OFF

TONE

OFF

BK-IN

OFF

RTTY

FIL
OFF

COMP

WIDE

OFF

5

1

PANEL DESCRIPTION

■ Front panel (continued)

@1 LCD FUNCTION SWITCHES [F-1]–[F-5]

Push to select the function indicated in the LCD dis­play above these switches.

• Functions vary depending on the operating condition.

@2 MODE SWITCHES

Selects the desired mode. (p. 29)

•Announces the selected mode when an optional UT-102
is installed. (pgs. 102, 105)

➥ Selects USB and LSB mode alternately.
➥ Selects SSB data mode (USB-D, LSB-D)

when pushed for 1 sec. in SSB mode.

➥ Selects CW and RTTY mode alternately.
➥ Switches CW and CW-R

(CW reverse)

mode when pushed for 1 sec. in CW
mode.

➥ Switches RTTY and RTTY-R (RTTY re-

verse)

mode when pushed for 1 sec. in

RTTY mode.

➥ Selects AM and FM mode alternately.
➥ Selects AM/FM data mode

(AM-D, FM-D)

when pushed for 1 sec. in AM or FM
mode.

@3 FILTER SWITCH [FILTER] (p. 61)

➥ Push to select one of 3 IF filter settings.
➥ Push for 1 sec. to enter the filter set mode.

@4 EXIT/SET SWITCH [EXIT/SET]

➥ Push to exit from a set mode, etc.
➥ Push for 1 sec. to enter the set mode screen.

(p. 94)

@5 REC/PLAY SWITCH [REC/PLAY] (p. 73)

➥ Push momentarily to playback the recorded con-

tents in the channel R4 of the voice memory.

➥ Push for 1 sec. to record the receiving signal con-

tents into the channel R4

(max. 15 sec.) of the

voice memory.

@6 TUNING DIAL (p. 25)

Changes the displayed frequency, selects set mode
settings, etc.

@7 LOCK/SPEECH SWITCH [LOCK/SPEECH]

➥ Push momentarily to toggle the dial lock function

ON and OFF. (p. 65)

➥ Push for 1 sec. to announce the S-meter indica-

tion and the selected readout frequency when an
optional UT-102 is installed. (p. 105)

@8 RIT/∂∂TX CONTROL [RIT/∂∂TX] (pgs. 58, 69)

Shifts the receive and/or transmit frequency without
changing the transmit and/or receive frequency
while the RIT and/or ∂TX 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/∂TX

Low shift High shift

#6

EIVER

NB NR

BAL NR

F-1 F-2 F-3 F-4 F-5

SSB

COMP BK-IN DELAY KEY SPEED

CW/RTTY

@1

AM/FM FILTER EXIT/SET

@2 @4@3 @5 @6

SSB

CW/RTTY

AM/FM

TWIN PBT

1.8 3.5 7

SPLIT

WATCH

CHANGE

MEMO

M.SCOPE

REC/PLAY

DUAL

VFO/

MAIN/

10 14 18

21 24 28

GENE

SUB

RX

123
456
789

50

•

0

MP-W MP-R

Y

Z

MW

M-CL

TS

XFC

LOCKTX

LOCK/SPEECH

@7

PBT CLR NOTCH

NOTCH

CW PITCH

TXRIT CLEAR

RIT/ TX

@8

F-INP

ENT

#5
#4

#3
#2

#1
#0
@9

6

1

PANEL DESCRIPTION

1

@9

∂∂

TX SWITCH [∂∂TX] (p. 69)

➥ Turns the ∂TX function ON and OFF when

pushed.

•Use the [RIT/∂∂TX] control to vary the ∂TX frequency.

➥ Adds the ∂TX shift frequency to the operating

frequency when pushed for 1 sec.

✔

What is the ∂∂TX function?

The ∂TX shifts the transmit frequency without shifting the re­ceive frequency. This is useful for simple split frequency op­eration in CW, etc.

#0 CLEAR SWITCH [CLEAR] (pgs. 58, 69)

Clears the RIT/∂TX shift frequency when pushed
for 1 sec. (default).

•The response time (for 1 sec. or momentarily) can be
selected on the quick RIT/∂TX clear setting (p. 103).

#1 RIT SWITCH [RIT] (p. 58)

➥ Turns the RIT function ON and OFF when

pushed.

• Use the [RIT/∂∂TX] control to vary the RIT frequency.

➥ Adds the RIT shift frequency to the operating fre-

quency when pushed for 1 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 on an off-fre­quency or when you prefer to listen to slightly different­sounding voice characteristics, etc.

#2 MANUAL NOTCH FILTER CONTROL [NOTCH]

(inner control; p. 64)
Varies the peak frequency of the manual notch fil-
ter to pick out a receive signal from interference
while the manual notch function is ON.

• Notch filter center frequency:

SSB : 0 Hz to 5100 Hz
CW : CW pitch freq.–900 Hz to CW pitch freq.

+4200 Hz

AM : –5100 Hz to 5100 Hz

#3 CW PITCH CONTROL [CW PITCH]

(outer control; p. 37)
Shifts the received CW audio pitch and monitored
CW audio pitch without changing the operating fre­quency.

#4 NOTCH SWITCH [NOTCH] (p. 64)

➥ Switches the notch function between auto, man-

ual and OFF in SSB and AM modes.

➥ Turns the manual notch function ON and OFF

when pushed in CW mode.

➥ Turns the auto notch function ON and OFF when

pushed in FM mode.

•“AN” appears on the display when auto notch is in
use.

•“MN” appears on the display when manual notch is in
use.

•The [NOTCH] indicator in this switch lights green

when the function is activated.

✔

What is the notch function?

The notch function eliminates unwanted CW or AM carrier
tones while preserving the desired signal’s audio response.
The filtering frequency is adjusted to effectively eliminate un­wanted tones via the DSP circuit.

#5 PBT CLEAR SWITCH [PBT CLR] (p. 60)

Clears the PBT settings when pushed for 1 sec.

•The [PBT CLR] indicator in this switch lights green when

PBT is in use.

#6 PASSBAND TUNING CONTROLS [TWIN PBT]

Adjust the receiver’s “passband width” of the DSP
filter. (p. 60)

•Passband width and shift frequency are displayed in the
LCD.

•Push [PBT CLR] for 1 sec. to clear the settings when
not in use.

•Variable range is set to half of the IF filter passband
width. 25 Hz steps and 50 Hz steps are available.

•These controls function as an IF shift control while in AM
mode and when the RTTY filter is turned ON. Only the
inner control may function in this case.

✔

What is the PBT control?

General PBT function electronically narrows the IF passband
width to reject interference. This transceiver uses the DSP
circuit for the PBT function.

Low cut High cutCenter

TWIN PBT TWIN PBT TWIN PBT

–+

PBT1

PBT2

TWIN PBT

NOTCHNOTCH

Notch OFF Notch ON

Approx. 300 Hz

Approx. 900 Hz

Lower frequency Higher frequency

NOTCH CW PITCH

NOTCH CW PITCH

Lower frequency Higher frequency

7

1

PANEL DESCRIPTION

■ Front panel (continued)

#7 RECEIVE INDICATOR [RX]

Lights green while receiving a signal and when the
squelch is open.

#8 TRANSMIT INDICATOR [TX]

Lights red while transmitting.

#9 LOCK INDICATOR [LOCK] (p. 65)

Lights red when the dial lock function is activated.

$0 TRANSMIT FREQUENCY CHECK SWITCH

[XFC]

Monitors the transmit frequency when pushed and
held during the split frequency operation.

•While pushing this switch, the transmit frequency can be
changed with the tuning dial, keypad, memo pad or the
[YY]/[ZZ] switches.

•When the split lock function is turned ON, pushing [XFC]
cancels the dial lock function. (p. 100)

$1 QUICK TUNING SWITCH [TS] (p. 26)

➥ Turns the quick tuning step ON and OFF.

•While the quick tuning indicator, “Z,” is displayed

above the frequency indication, the frequency can be
changed in programmed kHz steps.

•0.1, 1, 5, 9, 10, 12.5, 20 and 25 kHz quick tuning
steps are available for each operating mode indepen­dently.

➥ When the quick tuning step is OFF, push for 1

sec. to turn the 1 Hz tuning step ON and OFF.

•1 Hz indications appear in both readouts and the fre­quency can be changed in 1 Hz steps.

➥ When the quick tuning step is ON, push for 1 sec.

to enter the quick tuning step set mode.

$2 MEMORY CLEAR SWITCH [M-CL] (p. 81)

Clears the selected readout memory channel con­tents when pushed for 1 sec. in memory mode.

• The channel becomes a blank channel.

• This switch does not function in VFO mode.

$3 MEMORY WRITE SWITCH [MW] (p. 79)

Stores the selected readout frequency and operat­ing mode into the displayed memory channel when
pushed for 1 sec.

•This function is available both in VFO and memory
modes.

$4 MEMORY UP/DOWN SWITCHES [YY]/[ZZ] (p. 77)

➥ Push to select the memory channel number for

the selected readout.

•Memory channels can be selected both in VFO and
memory modes.

➥ Select the desired memory channel directly after

pushing [(F-INP)ENT] and a memory channel
number.

$5 MEMO PAD-READ SWITCH [MP-R] (p. 82)

Each pushing calls up a frequency and operating
mode in a memo pad. The 5 (or 10) most recently
programmed frequencies and operating modes can
be recalled, starting from the most recent.

•The memo pad capacity can be expanded from 5 to 10
in set mode for your convenience. (p. 102)

BWBW

2.4k2.4k

SFTSFT

0

FIL2FIL2

TXTX

CWCW

qr.qpp.pp

21.076.5021.076.50

VFOVFO

USBUSB

1

METER

Po

ANT

1

qw:pp

12:0012:00

Quick tuning indicator

%3

CEIVER

NB NR

BAL NR

F-1 F-2 F-3 F-4 F-5

SSB

COMP BK-IN DELAY KEY SPEED

CW/RTTY

AM/FM FILTER EXIT/SET

%2 %1 $7

SPLIT

DUAL

WATCH

CHANGE

VFO/

MEMO

M.SCOPE

MAIN/

SUB

RX

REC/PLAY

$6$9%0 $8

1.813.527

10414518

21724828

GENE

50

0

MP-W MP-R

F-INP

#7 #8 #9

3
6
9

ENT

$5

Y

Z

MW

M-CL

TS

XFC

LOCKTX

LOCK/SPEECH

TWIN PBT

PBT CLR NOTCH

NOTCH

CW PITCH

TXRIT CLEAR

RIT/ TX

$4

$3
$2

$1
$0

8

1

PANEL DESCRIPTION

$6 KEYPAD

➥ Pushing a key selects the operating band.

•[(GENE)•] selects the general coverage band.

➥ Pushing the same key 2 or 3 times calls up other

stacked frequencies in the band. (p. 24)

•Icom’s triple band stacking register memorizes 3 fre­quencies in each band.

➥ After pushing [(F-INP)ENT], enters a keyed fre-

quency or memory channel. Pushing [(F-
INP)ENT] or [YY]/[ZZ] is necessary at the end.
(pgs. 25, 77)

•e.g. to enter 14.195 MHz, push [(F-INP)ENT] [1] [4]
[•] [1] [9] [5] [(F-INP)ENT].

$7 MEMO PAD-WRITE SWITCH [MP-W] (p. 82)

Programs the selected readout frequency and op­erating 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. 102)

$8 SPLIT SWITCH [SPLIT] (p. 71)

➥ Turns the split function ON and OFF when

pushed.

➥ Turns the split function ON, equalizes the sub

readout frequency to the main readout and sets
the sub readout for frequency input when pushed
for 1 sec. in non-FM modes.

(Quick split function)

•The offset frequency is shifted from the main readout
frequency in FM mode. (pgs. 52, 100)

•The quick split function can be turned OFF using set
mode. (p. 100)

➥ Turns the split function ON and shifts the sub

readout frequency after input an offset (±4 MHz
in 1 kHz steps).

$9 DUALWATCH SWITCH [DUALWATCH] (p. 63)

➥ Turns the dualwatch function ON and OFF when

pushed.

➥ Turns the dualwatch function ON and equalizes

the sub readout frequency to the main readout
when pushed for 1 sec. (Quick dualwatch function)

•The quick dualwatch function can be turned OFF
using set mode. (p. 98)

%0 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. 71)

➥ Equalizes the sub readout frequency to the main

readout frequency when pushed for 1 sec.

%1 VFO/MEMORY SWITCH [VFO/MEMO]

➥ Switches the selected readout operating mode

between the VFO mode and memory mode when
pushed. (pgs. 23, 77)

➥ Transfers the memory contents to VFO when

pushed for 1 sec. (p. 80)

%2 MAIN/SUB•M.SCOPE SWITCH

[MAIN/SUB•M.SCOPE]

➥ Push momentarily to select access to the main or

sub readout. (p. 23)

•The sub readout frequency is displayed in outline or
mesh font. The sub readout functions only during split
operation or dualwatch.

➥ Push for 1 sec. to turn the mini spectrum scope

screen indication ON and OFF. (p. 55)

•The mini spectrum scope screen can be indicated
with another screen, such as memory, set mode
screen, simultaneously.

%3 LCD FUNCTION DISPLAY (See p. 9 for details.)

Shows the operating frequency, function switch
menus, spectrum scope screen, memory channel
screen, set mode settings, etc.

1

9

1

PANEL DESCRIPTION

■ LCD display

q TX INDICATOR

Indicates the frequency readout for transmission.

w VFO/MEMORY CHANNEL INDICATOR

(pgs. 23, 77)
Indicates the VFO mode or selected memory chan­nel number.

e SELECT MEMORY CHANNEL INDICATOR (p. 86)

Indicates the displayed memory channel is set as a
select memory channel.

r MULTI-FUNCTION SWITCH GUIDE

Indicates the function of the multi-function switches.

t LCD FUNCTION SWITCH GUIDE

Indicates the function of the LCD function switches
([F-1]– [F-5]).

y MULTI-FUNCTION SCREEN (p. 10)

Shows the screens for the multi-function digital
meter, spectrum scope, voice recorder, memory
channel, scan, memory keyer, RTTY decoder, IF fil-
ter selection or set modes, etc.

u MEMORY CHANNEL READOUTS (p. 77)

➥ Show the selected memory channel contents in

VFO mode.

➥ Show the VFO contents in memory mode.

i FREQUENCY READOUTS (p. 25)

Show the operating frequency.

• Outline characters are used for non-accessing readout.

o CLOCK READOUT (p. 92)

Shows the current time.

• Dualtime indication is available.

!0 RTTY TUNING INDICATOR (p. 47)

Shows the tuning level in RTTY mode.

!1 QUICK TUNING INDICATOR (p. 26)

Appears when the quick tuning step function is in
use.

!2 PASSBAND WIDTH INDICATOR (pgs. 60, 61)

Graphically displays the passband width for twin
PBT operation and center frequency for IF shift op­eration.

!3 IF FILTER INDICATOR (p. 61)

Shows the selected IF filter number.

!4 SHIFT FREQUENCY INDICATOR (p. 60)

Shows the shift frequency of the IF filter.

!5 MODE INDICATOR (p. 29)

Shows the selected mode.

!6 BAND WIDTH INDICATOR (p. 61)

Shows the passband width of the IF filter.

+12.5k

-12.5k

SPECTRUM SCOPE

USB

23:00

!6 !4!5 !2!3 !1 !0 o

q
w

e
w

r

ANT

1

METER

Po

P.AMP

1

ATT
OFF

AGC
MID

VOX
OFF

COMP

OFF

WIDE

SPAN

2.4k

BW

VFO

qr.qqy.pp

1ß 21.085.00 CW

56ß

qr.qpp.pp

-12.5k

Grid
10k
10dB

ATT

10dB

SUB

MARKER

HOLD

ATT

0

SFT

USB

USB

VFO 21.085.00TXCW

FIL2

FIL2

SPECTRUM SCOPE

MARKER

HOLD

t

qw:pp

23:00

+12.5k

SET

i
u

i
u

y

10

1

PANEL DESCRIPTION

1

ATT
0FF

METER

Po

P.AMP

1

BK-IN

OFF

1/4
OFF

BW

2.4k

SFT

0

VFO

FIL2

CW

AGC
MID

1

TX

VFO

1

USB

CW

CW

FIL2

qr.qpp.pp

qr.qpp.pp

--. ---. --

--. ---. --

SCOPE

VOICE KEYER

MEMORY

SCAN

ANT

1

BK-INBK-IN

OFFOFF

1/41/4
OFFOFF

AGCAGC
MIDMID

CQ TEST CQ TEST DE ICOM ICOMCQ TEST CQ TEST DE ICOM ICOM
TEST

QRZ?

CFM TUCFM TU

UR 5NNUR 5NN001 BK BK

M1M1

M2M2

M3M3

M4M4

M1

M2

M3

M4

-1

BK-IN

OFF

1/4
OFF

AGC
MID

T4 - - -

T1

- - -

T3

- - -

VOICE RECORDER

T2

- - -

TX MEMORY

T1

T2

T3

T4

T/R

BK-INBK-IN

OFFOFF

1/41/4
OFFOFF

AGCAGC
MIDMID

GridGrid

2.5k2.5k
10dB10dB

+12. 5k+12. 5k

-12. 5k-12. 5k

SPECTRUM SCOPESPECTRUM SCOPE

SPANSPAN

ATTATT

MARKERMARKER

HOLDHOLD

SET

BK-INBK-IN

OFFOFF

1/41/4
OFFOFF

AGCAGC
MIDMID

SCANSCAN

∂

F SpanSpan : ± 10kHz 10kHz

ProgrammedProgrammed P1:P1: 0.500.00MHz0.500.00MHz
scan edgesscan edges P2:P2: 29.999.99MHz29.999.99MHz

PROGPROG

∂

F

FINEFINE

∂

F SPANF SPAN

SETSET

BK-INBK-IN

OFFOFF

1/41/4
OFFOFF

AGCAGC
MIDMID

SCANSCAN

∂

F

SpanSpan : ± 10kHz 10kHz

ProgrammedProgrammed P1:P1: 0.500.00MHz0.500.00MHz
scan edgesscan edges P2:P2: 29.999.99MHz29.999.99MHz

MEMOMEMO

∂

F

SELECTSELECT

∂

F SPANF SPAN

SETSET

THRESHOLD 9

RTTYRTTY

FILFIL

ONON

AGCAGC
MIDMID

RTTY DECODERTTY DECODE

MEMORY KEYERMEMORY KEYER

**** RTTY Decode Monitor ******** RTTY Decode Monitor ****
45bps BAUDOT Mark=2125,Shift=170 45bps BAUDOT Mark=2125,Shift=170
UnShift On Space support (SET-OTHERS) UnShift On Space support (SET-OTHERS)

New Line Code selectable (SET-OTHERS) New Line Code selectable (SET-OTHERS)

If RTTY-FIL is OFF, Please turn ON. If RTTY-FIL is OFF, Please turn ON.

1/41/4
OFFOFF

<MENU1><MENU1>

HLD/CLRHLD/CLR TX MEMTX MEM

ADJADJ

WIDEWIDE

BK-INBK-IN

OFFOFF

1/41/4
OFFOFF

AGCAGC
MIDMID

MEMORYMEMORY

9999

--.---.----.---.-- ------------ ------

PP 11 00 0.500.000.500.00 USBUSB FL2 SCAN EDGEFL2 SCAN EDGE

P2P2 29.999.9929.999.99 USBUSB FL2 SCAN EDGEFL2 SCAN EDGE

1 1 --.---.----.---.-- ------------ ------

2 2 --.---.----.---.-- ------------ ------

33 --.---.----.---.-- ------------ ------

4 4 --.---.----.---.-- ------------ ------

ROLLROLL

SETSET

SELECTSELECT

NAMENAME

WIDEWIDE

• Start up screen

• Voice recorder screen (p. 73)

• Memory keyer screen (CW mode: p. 40)

• Spectrum scope screen (p. 55)

• Memory channel screen (p. 78)

• Programmed scan screen (VFO mode: p. 84)

• RTTY decoder screen (RTTY mode: p. 46)

• Memory scan screen (Memory mode: p. 85)

F-1

F-1

F-4F-2

F-5

F-3

F-5

F-3

F-2 F-3 F-4 F-5

qw:pp

12:00

■ 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. 94 for set mode arrangement.

11

1

PANEL DESCRIPTION

■ Rear panel

q TRANSVERTER JACK [XVERT] (p. 18)

External transverter input/output jack. Activated by
voltage applied to [ACC(2)] pin 6.

w RECEIVE ANTENNA CONNECTOR [RX ANT]

(p. 15)
Connects a 50 Ω general coverage antenna with an
RCA connector.

e TUNER CONTROL SOCKET [TUNER] (p. 15)

Accepts the control cable from an optional AH-4

HF/50 MHz AUTOMATIC ANTENNA TUNER or AH-3 HF
AUTOMATIC ANTENNA TUNER

.

r ACCESSORY SOCKET 1 [ACC(1)]
t ACCESSORY SOCKET 2 [ACC(2)]

Enable connection of external equipment such as a
linear amplifier, an automatic antenna selector/
tuner, TNC for data communications, etc.

• See p. 20 for socket information.

y STRAIGHT KEY JACK [KEY] (p. 14)

Accepts a straight key or external electronic keyer
with 1⁄4 inch standard plug.

•[ELEC-KEY] on the front panel can be used for a

straight key or external electronic keyer. Deactivate the
internal electronic keyer in keyer set mode. (p. 43)

If you use an external electronic keyer, make
sure the voltage retained by the keyer is less
than 0.4 V when the key is ON.

u CI-V REMOTE CONTROL JACK [REMOTE]

(p. 110)
➥ Connects a PC via the optional CT-17

CI-V LEVEL

CONVERTER

for external control of the transceiver

functions.

➥ Used for transceive operation with another Icom

CI-V transceiver or receiver.

i EXTERNAL SPEAKER JACK [EXT SP]

(pgs. 15, 116)
Accepts an 4–8 Ω speaker.

o ALC INPUT JACK [ALC] (p. 17)

Connects to the ALC output jack of a non-Icom lin­ear amplifier.

!0 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/0.5 A

!1 DC POWER SOCKET [DC 13.8V] (p. 16)

Accepts 13.8 V DC through the supplied DC power
cable (OPC-025D).

Rear panel view

!4 !3 !2

q w!0

ertyuio

!1

(+)

(_)

12

1

PANEL DESCRIPTION

1

!2 ANTENNA CONNECTOR 1 [ANT1]
!3 ANTENNA CONNECTOR 2 [ANT2] (pgs. 13, 14)

Accept a 50 Ω antenna with a PL-259 connector.

When using an optional AH-4 HF/50 MHz AUTO-

MATIC ANTENNATUNER

or AH-3 HF AUTOMATIC AN-

TENNA TUNER

, connect it to the [ANT1] connector.
The internal antenna tuner activates for [ANT2] and
deactivates for [ANT1] when connecting the AH-4
or AH-3.

!4 GROUND TERMINAL [GND] (pgs. 13, 14)

Connect this terminal to a ground to prevent electri­cal shocks, TVI, BCI and other problems.

■ Microphone

(HM-36)

q 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. 43)

w PTT SWITCH

Push and hold to transmit; release to receive.

q

w

+

+

q

w

ert

y

u

i

4700p

4700p

10µ

0.33µ

MICROPHONE

MIC
ELEMENT

2k

470

DOWN UP

PTT

RECEIVE
TRANSMIT

MICROPHONE CABLE MICROPHONE PLUG

• HM-36 SCHEMATIC DIAGRAM

2

INST ALLATION AND CONNECTIONS

■ 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 equip­ment included with the IC-756PROIII, see ‘Supplied
accessories’ on p. i of this manual.

■ Selecting a location

Select a location for the transceiver that allows ade­quate air circulation, free from extreme heat, cold, or
vibrations, and away from TV sets, TV antenna ele­ments, radios and other electromagnetic sources.

The base of the transceiver has an adjustable stand
for desktop use. Set the stand to one of two angles de­pending on your operating conditions.

■ Grounding

To prevent electrical shock, television interference
(TVI), broadcast interference (BCI) and other prob­lems, ground the transceiver through the GROUND
terminal on the rear panel.

For best results, connect a heavy gauge wire or strap
to a long earth-sunk copper rod. Make the distance be­tween the [GND] terminal and ground as short as pos­sible.

RWARNING: NEVERconnect the [GND]

terminal to a gas or electric pipe, since the connec­tion could cause an explosion or electric shock.

■ Antenna connection

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.

When using 1 antenna, use the [ANT1] connector.

CAUTION: Protect your transceiver from lightning

by using a lightning arrestor.

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 transis­tor. In this case, an antenna tuner is useful to match
the transceiver and antenna. Low SWR allows full
power for transmitting even when using the antenna
tuner. The IC-756PROIII has an SWR meter to mon­itor the antenna SWR continuously.

PL-259 CONNECTOR INSTALLATION EXAMPLE

30 mm ≈9⁄8 in 10 mm ≈3⁄8 in 1–2 mm ≈1⁄16 in

30 mm

10 mm (soft solder)

10 mm

1–2 mm

solder solder

Soft
solder

Coupling ring

Slide the coupling ring
down. Strip the cable
jacket and soft solder.

Slide the connector
body on and solder it.

Screw the coupling
ring onto the
connector body.

Strip the cable as
shown at left. Soft
solder the center con­ductor.

q

w

e

r

13

2

14

INSTALLATION AND CONNECTIONS

2

■ Required connections

•Front panel

•Rear panel

CW KEY

TIMER

POWER

TRANSMIT

PHONES

ELEC-KEY

MIC

HF/50MHz TRANSCEIVER

9

+20

5

+40

1

25 50

10

100

0

S

3

2

Po

1.5

1

20

10

SWR

0

COMP

dB

ALC

TUNER MONITOR NB NR

AF BAL NRRF/SQL

MIC GAIN RF POWER COMP KEY SPEEDBK-IN DELAY

1.8 3.5 7

1

2

REC/PLAY

CHANGE

M.SCOPE

SPLIT

DUAL

WATCH

VFO/

MEMO

MAIN/

SUB

RX

10 14 18

4

5

21 24 28

8

7

GENE

50

0

MP-W MP-R

F-INP

+60dB

F-1

F-2 F-3 F-4 F-5

SSB

CW/RTTY

AM/FM FILTER EXIT/SET

TWIN PBT

3
6

MW

9

PBT CLR

TS

LOCKTX

LOCK/SPEECH

CW PITCH

NOTCH

TX

RIT CLEAR

RIT/ TX

NOTCH

M-CL

ENT

XFC

A straight key can be used
when the internal electronic
keyer is turned OFF in keyer
set mode. (p. 43)

ANTENNA 1, 2 (p. 13)
[Example]: ANT1 for 1.8–18 MHz bands

GROUND (p. 13)

MICROPHONES (p. 116)

SM-20HM-36

DC POWER SUPPLY (p.16)

ANT2 for 21–50 MHz bands

PS-125

Use the heaviest gauge wire
or strap available and make
the connection as short as
possible.

Grounding prevents electrical
shocks, TVI and other
problems.

STRAIGHT KEY

15

2

INSTALLATION AND CONNECTIONS

■ Advanced connections

•Front panel

•Rear panel

HEADPHONES

TIMER

HF/50MHz TRANSCEIVER

POWER

TRANSMIT

PHONES

ELEC-KEY

MIC

5

1

10

0

S

Po

1.5

1

SWR

0

COMP

ALC

TUNER MONITOR NB NR

AF BAL NRRF/SQL

MIC GAIN RF POWER COMP KEY SPEEDBK-IN DELAY

MIC

The AFSK modulation signal
can be input from [MIC]. (p. 19)

ANTENNA 1, 2 (pgs. 17, 18)
Connects a linear amplifier,
antenna selector, etc.

1.8 3.5 7

1

REC/PLAY

CHANGE

M.SCOPE

SPLIT

DUAL

WATCH

VFO/

MEMO

MAIN/

SUB

RX

10 14 18

4

21 24 28

7

GENE

50

MP-W MP-R

9

+20

+40

+60dB

25 50

100

3

2

20

10

dB

F-1

F-2 F-3 F-4 F-5

SSB

CW/RTTY

AM/FM FILTER EXIT/SET

[REMOTE] (p. 110)

Used for computer control and transceive operation.

TWIN PBT

3

2

6

5

MW

9

8
0

PBT CLR

M-CL

TS

XFC

LOCKTX

LOCK/SPEECH

NOTCH

TX

RIT CLEAR

RIT/ TX

NOTCH

CW PITCH

F-INP

ENT

RX ANTENNA

TRANSVERTER

(p. 18)
Connects a transverter
for V/UHF band use.

When using the AH-4/AH-3,

AH-2b

it must be connected to the
[ANT1] connector.

AH-4/AH-3

(p. 18)

ACC SOCKETS (pgs. 19, 20)

EXTERNAL SPEAKER (p. 116)

SP-23

[SEND], [ALC]
(p. 17)
Used for connecting a
non-Icom linear ampli­fier.

16

2

INSTALLATION AND CONNECTIONS

2

■ Power supply connections

Use the optional PS-125 DC power supply with a 25 A
capacity when operating the transceiver with AC
power. Refer to the diagrams below.

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.

Red : positive + terminal
Black : negative _ terminal

CONNECTING A DC POWER SUPPLY

to DC power
socket

A DC power supply

AC outlet

AC cable

30 A fuses

Supplied
DC power cable

13.8 V; at least 23 A
Black_Red

+

Transceiver

CONNECTING A VEHICLE BA TTER Y

12 V
battery

Supplied
DC power cable

+ red

_ black

Crimp

Solder

Grommet

NOTE: Use terminals for
the cable connections.

R WARNING NEVER con­nect to a battery without supplied

DC fuses, otherwise a fire hazard
may occur.

NEVER connect the transceiver

directly to a 24 V battery.

IMPORTANT! Detailed installation

notes for Icom mobile transceivers to
be fitted into vehicles are available.
Contact your Icom dealer or distribu­tor.

CONNECTING PS-125 DC POWER SUPPLY

PS-125

Connect to an AC outlet
using the supplied AC cable.

DC power cable

DC power
socket

Transceiver

17

2

INSTALLATION AND CONNECTIONS

■ Linear amplifier connections

Use the [ANT1] connector when connecting a linear
amplifier.

CONNECTING THE IC-PW1/EURO

Turn OFF the transceiver’s antenna tuner while tuning the IC-PW1/EURO’s tuner.

CONNECTING A NON-ICOM LINEAR AMPLIFIER

R WARNING:

Set the transceiver output power and linear amplifier
ALC output level referring to the linear amplifier in­struction manual.

The ALC input level must be in the range 0 V to –4 V,

and the transceiver does not accept positive voltage.
Non-matched ALC and RF power settings could cause
a fire or ruin the linear amplifier.

The specifications for the SEND relay are 16 V DC

0.5 A. If this level is exceeded, a large external relay
must be used.

Remote control cable (supplied with the IC-PW1/EURO)

ACC cable (supplied with the IC-PW1/EURO)

INPUT1

INPUT2

1&2

GND

ANT

To an
antenna

ACC-1

REMOTE

EXCITER
1

IC-PW1/EURO

AC outlet

(Non-European versions: 100–120/220–240 V
European version : 230 V)

Be sure to connect the cable
to the 7-pin ACC(2) jack.

Coaxial cable

(supplied with the IC-PW1/EURO)

Connect

Coaxial cable

(optional)

ANT2

GND

Ground

[INPUT2]
if necessary

ACC(2)

ANT1

Transceiver

REMOTE

To an
antenna

RF OUTPUT RF INPUT

Non-Icom linear amplifier

Transceiver

ANT1 ALC SEND

50 Ω coaxial
cable

ALC

SEND

18

2

INSTALLATION AND CONNECTIONS

2

■ External antenna tuner connection

CONNECTING THE AH-4/AH-3

The AH-4 or AH-3 must be connected to [ANT1].

(Front panel view)

CAUTION: DO NOT short pin 2 to ground as this

can damage the internal 8 V regulator.
NOTE: DC voltage is applied to pin 1 for micro­phone operation. Take care when using a non-Icom
microphone.

[MIC]

FUNCTION DESCRIPTION

Pin No.

w +8 V DC output Max. 10 mA

e

Frequency up Ground

Frequency down Ground through 470 Ω

r

Squelch open “Low” level

Squelch closed “High” level

■ Microphone connector 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. 20)

While receiving, the [XVERT] jack can be activated
as an input terminal from an external transverter.

While transmitting, the [XVERT] jack outputs signals
of the displayed frequency at –20 dBm (22 mV) as
signals for the external transverter.

Transverter jack

■ Transverter jack information

Coaxial cable (from the AH-4 or AH-3)

ANT1

Transceiver

Control cable

Ground

Long wire or optional AH-2b

AH-4 or AH-3

q Microphone input

w +8 V DC output

e Frequency up/down

i Main readout AF output

(varies with [AF]/[BAL])

u GND

(Microphone ground)

y GND (PTT ground)

t PTT

r Main readout squelch switch

19

2

INSTALLATION AND CONNECTIONS

AF input
Ground (GND)

PTT
SQUELCH input*
RTTY keying

* Connect the SQUELCH line when required.

Terminal unit (TU) or
Terminal Node Controller (TNC)

[ACC(1)] socket

(Rear panel view)

1

2

3

4

5

6

7

8

AFSK output

AF input
Ground (GND)

Ground (GND)

PTT
SQUELCH input*

* Connect the SQUELCH line when required.

Terminal Node Controller (TNC)
or Scan converter

[ACC(1)] socket

(Rear panel view)

1

2

3

4

5

6

7

8

AF input

Ground (GND)

AFSK output

PTT
SQUELCH input*

* Connect the SQUELCH line when required.

Terminal Node Controller (TNC)
or Scan converter

[MIC] connector

(Front panel view)

1

2

345

678

■ 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. 61)

FSK (RTTY) connection

Use RTTY mode for
operation

AFSK and SSTV connections

Use SSB or FM mode
for operation

AFSK and SSTV connections via microphone connector

Use SSB or FM mode
for operation

When connected to the [MIC] connector, [MIC
GAIN] and [AF] control adjustment is required.

20

2

INSTALLATION AND CONNECTIONS

■ Accessory connector information

If the CW side tone level limit or beep level limit is in
use, the CW side tone or beep tone decreases from
the fixed level when the [AF] control is rotated
above a specified level, respectively. (p. 96)

ACC (1)

PIN No.

NAME DESCRIPTION SPECIFICATIONS

1

2

3

4

5

6

7

8

“High” level : More than 2.4 V

1RTTY 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 : –0.5 V to 0.8 V

3 SEND Goes to ground when transmitting.

Output current : Less than 20 mA

When grounded, transmits.

Input current (Tx) : Less than 200 mA
Connected in parallel with ACC(2) pin 3.

4 MOD

Modulator input. Input impedance : 10 kΩ
Connects to a modulator. Input level : Approx. 100 mV rms

AF detector output.

Output impedance : 4.7 kΩ

5AFFixed, regardless of [AF] position

Output level : 100–300 mV rms

in default settings. (see notes below)

6 SQLS

Squelch output. SQL open : Less than 0.3 V/5 mA
Goes to ground when squelch opens.

SQL closed : More than 6.0 V/100 µA

7 13.8 V 13.8 V output when power is ON.

Output current : Max. 1 A
Connected in parallel with ACC(2) pin 7.

Control voltage : –4 V to 0 V

8 ALC ALC voltage input. Input impedance : More than 10 kΩ

Connected in parallel with ACC(2) pin 5.

ACC (2)

PIN No.

NAME DESCRIPTION SPECIFICATIONS

1

2

3

4

5

6

7

18VRegulated 8 V output.

Output voltage : 8 V ±0.3 V
Output current : Less than 10 mA

2 GND Same as ACC(1) pin 2.

3 SEND Same as ACC(1) pin 3.

4 BAND

Band voltage output.

Output voltage : 0 to 8.0 V

(Varies with amateur band)

5 ALC Same as ACC (1) pin 8.

6TRV

Activates [XVERT] input/output Input impedance : More than 10 kΩ
when “HIGH” voltage is applied. Input voltage : 2 to 13.8 V

7

13.8 V

Same as ACC(1) pin 7.

Rear panel view

Rear panel view

2

Before first applying power, make sure all connections
required for your system are complete by referring to
Section 2. Then, reset the transceiver using the follow­ing procedure.

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)ENT], push

[POWER] to turn power ON.

• The internal CPU is reset.

•A/D convertor calibration of the DSP unit starts and it
takes 10 sec.

•The transceiver displays its initial VFO frequencies when
resetting is complete.

e Correct the set mode settings after resetting, if de-

sired.

■ Initial settings

After resetting the transceiver, set controls and
switches as shown in the figure below.

Under cooler temperatures, the LCD may appear
dark and unstable after turning power ON. This is
normal and does not indicate any equipment mal­function.

CW : Max. clockwise
CCW : Max. counterclockwise

■ When first applying power (CPU resetting)

Turn power ON, then check the display. If any of the
following indicators appear, turn them OFF as follows:

• Quick tuning step indicator “▼”: Push [TS].

•1 Hz frequency readout : Push [TS] for 2 sec.

(while quick tuning

step is OFF)

• RIT indicator “ ” : Push [RIT].

• ∂TX indicator “ ” : Push [∂∂TX].

• Split indicator “ ” : Push [SPLIT].

• Dualwatch indicator “ ” : Push

[DUALWATCH].

•

Twin peak filter indicator “ ”

: Push [RTTY FIL].

• Auto notch indicator “ ” : Push [NOTCH].

• Manual notch indicator “ ” : Push [NOTCH].

TPF

DUAL-W

SPLIT

TX

RIT

3

21

BASIC OPERATION

[POWER] [F-INP] [M-CL]

[ANT]: 1

[METER]: Po

[POWER]: OFF
[TUNER], [MONITOR],

[NB], [NR]: OFF

[AF]: Max. CCW

[RF/SQL]: 12 o’clock

[MIC GAIN]: 10–12 o’clock

[RF POWER]: Max. CW

[BAL]: Center [AGC]: MID*

[COMP]*
[1/4],*

2

: OFF WIDE;

2

[TONE]*2: OFF

[P.AMP]: 1

[ATT]: OFF

2

[VOX],*
[RTTY FIL]*2: OFF

[BK-IN],*

[PBT CLR]: OFF

1

2

[LOCK]: OFF

*1 FAST in FM mode.

2

*

Appears in some modes.

[NOTCH]: OFF

RIT

∂TX

SPLIT

DUAL-W

AN

TPF

MN

22

3

BASIC OPERATION

3

■ 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-756PROIII acts like a computer’s window and
can show one frequency and one operating mode.

You can call up a desired frequency to the VFO with
the keypad, memo pad-read switch (see p. 82) or the
memory transfer function (see p. 80). You can also
change the frequency with the tuning dial and select
the operating mode with the mode switches.

During dualwatch or split frequency operation, the sub
VFO is functional (non-outline, non-spotted, larger fre­quency characters). While pushing [XFC] during split
frequency operation, you can change the transmit
readout frequency with the keypad, memo pad-read
switch or the memory transfer function.

METER

Po

ANT

1

BWBW

2.4k2.4k

SFTSFT

0

VFOVFO

FIL2FIL2

USBUSB

TXTX

1

CWCW

qr.qpp.pp

21.076.5021.076.50

qw:pp

12:0012:00

Select

TUNING DIAL

MEMORY

CHANNEL

MODE

SWITCHES

MEMO PAD

KEYPAD

(BAND KEY)

Transfer

Transfer

Transfer

Change

21.295 MHz

28.025 MHz

7.001 MHz

•Differences between VFO mode and memory mode

VFO MODE

VFO shows a frequency and operating mode. If the
frequency or operating mode is changed, the VFO
automatically memorizes the new frequency or new
operating mode.

When a VFO is selected from another band or mem­ory mode, the frequency and operating mode last
used for that VFO appear.

[EXAMPLE]

MEMORY MODE (pgs. 77–81)

Each memory channel shows a frequency and oper­ating 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 fre­quency and operating mode appear.

[EXAMPLE]

METERMETER

PoPo

ANTANT

1

METERMETER

PoPo

ANTANT

1

METERMETER

PoPo

ANTANT

1

METERMETER

PoPo

ANTANT

1

BWBW

2.4k2.4k

SFTSFT

0

VFOVFO

FIL2FIL2

USBUSB

TXTX

1

CWCW

qr.qwe.pp

21.076.5021.076.50

BWBW

500 500

SFTSFT

0

BPFBPF

1

FIL2FIL2

CWCW

TXTX

VFOVFO

USBUSB

wq.puy.tp

14.123.0014.123.00

BWBW

2.4k2.4k

SFTSFT

0

VFOVFO

FIL2FIL2

USBUSB

TXTX

1

CWCW

qr.qwe.pp

21.076.5021.076.50

BWBW

2.4k2.4k

SFTSFT

0

VFOVFO

FIL2FIL2

USBUSB

TXTX

1

CWCW

qr.qpp.pp

21.076.5021.076.50

BWBW

2.4k2.4k

SFTSFT

0

FIL2FIL2

USBUSB

TXTX

VFOVFO

USBUSB

qr.qpp.pp

14.100.0014.100.00

BWBW

2.4k2.4k

SFTSFT

0

FIL2FIL2

USBUSB

TXTX

VFOVFO

USBUSB

wq.wrt.pp

14.100.0014.100.00

BWBW

2.4k2.4k

SFTSFT

0

FIL2FIL2

USBUSB

TXTX

VFOVFO

USBUSB

qr.qwe.pp

14.100.0014.100.00

BWBW

2.4k2.4k

SFTSFT

0

1

FIL2FIL2

USBUSB

TXTX

VFOVFO

USBUSB

qr.qpp.pp

14.100.0014.100.00

1

1212

1

METERMETER

PoPo

ANTANT

1

METERMETER

PoPo

ANTANT

1

METERMETER

PoPo

ANTANT

1

METERMETER

PoPo

ANTANT

1

qw:pp

12:0012:00

qw:pp

12:0012:00

qw:pp

12:0012:00

qw:pp

12:0012:00

qw:pp

12:0012:00

qw:pp

12:0012:00

qw:pp

12:0012:00

qw:pp

12:0012:00

VFO is selected.

The frequency is changed.

Memory mode is selected.

VFO is selected again.

Memory channel 1 is selected.

The frequency is changed.

Another memory channel is selected.

Memory channel 1 is selected again.

Changed frequency (14.123 MHz) appears.

Changed frequency (14.123 MHz) does not appear and
memorized frequency (14.100 MHz) appears instead.

23

3

BASIC OPERATION

➥ Push [VFO/MEMO] to switch between VFO and

memory modes.

•“VFO” appears when VFO mode, or the selected mem­ory channel number appears when memory mode is
selected beside the frequency readout.

•Pushing [VFO/MEMO] for 1 sec. transfers the contents

of the selected memory channel to VFO mode. (p. 80)

SFTSFT

0

FIL2FIL2

CWCW

TXTX

USBUSB

qr.qot.pp

14.100.0014.100.00

BPFBPF

1

VFOVFO

BWBW

500 500

SFTSFT

0

FIL2FIL2

USBUSB

TXTX

CWCW

qr.qpp.pp

14.195.0014.195.00

VFOVFO

1

BWBW

2.4k2.4k

ANTANT

1

METERMETER

PoPo

ANTANT

1

METERMETER

PoPo

qw:pp

12:00

qw:pp

12:00

“VFO” indicator

Memory channel number

[VFO/MEMO]

■ Selecting VFO/memory mode

➥ Push [MAIN/SUB] to select access to the main or

sub readout.

•The sub readout frequency is displayed in outline or

mesh font. The sub readout functions only during split
oeration or dualwatch.

[MAIN/SUB]

■ Main/Sub band selection

24

3

BASIC OPERATION

3

The triple band stacking register provides 3 memories
in one band. 3 sets of a frequency and operating mode
on each band are automatically stored when used.

If a band key is pushed once, the frequency and oper­ating mode last used are called up. When the key is
pushed again, another stored frequency and operating
mode are called up.

This function is convenient when you operate 3 oper­ating modes on one band. For example, one register
is used for a CW frequency, another for an SSB fre­quency and the other one for an RTTY frequency.

See the table below for a list of the band available and
the default settings for each band.

Band keys

■ Selecting an operating band

BAND REGISTER 1 REGISTER 2 REGISTER 3

1.8 MHz 1.900000 MHz CW 1.910000 MHz CW 1.915000 MHz CW

3.5 MHz 3.550000 MHz LSB 3.560000 MHz LSB 3.580000 MHz LSB
7 MHz 7.050000 MHz LSB 7.060000 MHz LSB 7.020000 MHz CW

10 MHz 10.120000 MHz CW 10.130000 MHz CW 10.140000 MHz CW
14 MHz 14.100000 MHz USB 14.200000 MHz USB 14.050000 MHz CW
18 MHz 18.100000 MHz USB 18.130000 MHz USB 18.150000 MHz USB
21 MHz 21.200000 MHz USB 21.300000 MHz USB 21.050000 MHz CW
24 MHz 24.950000 MHz USB 24.980000 MHz USB 24.900000 MHz CW
28 MHz 28.500000 MHz USB 29.500000 MHz USB 28.100000 MHz CW
50 MHz 50.100000 MHz USB 50.200000 MHz USB 51.000000 MHz FM

General 15.000000 MHz USB 15.100000 MHz USB 15.200000 MHz USB

q Push [(14)5], then select a frequency and an op-

erating mode.

•Frequency and operating mode are memorized in the

first band stacking register.

w Push [(14)5] again, then select another frequency

and operating mode.

•This frequency and operating mode are memorized in
the second band stacking register.

e Push [(14)5] again, then select another frequency

and operating mode.

•This frequency and operating mode are memorized in
the third band stacking register.

•When a fourth frequency and operating mode are se­lected on a band, the first register set in step q, is over
written.

[Example]: 14 MHz band

1.8 3.5 7

10 14 18

21 24 28

GENE

•

50

123

4 5 6

789

0

F-INP

ENT

DD

Using the band stacking registers

25

3

BASIC OPERATION

The transceiver has several tuning methods for conve­nient frequency tuning.

■ Frequency setting

DD

Direct frequency entry with the keypad

DD

Tuning with the tuning dial

q Push the desired band key on the keypad 1–3

times.

•3 different frequencies can be selected on each band
with the band key. (See previous page “Using the band
stacking register.”)

w Rotate the tuning dial to set the desired frequency.

If the dial lock function is activated, the lock indica­tor lights, and the tuning dial does not function. In
this case, push [LOCK/SPEECH] to deactivate the
lock function. (p. 65)

BW

2.4k

SFT

VFO

FIL2

USB

TX

CW

21.076.50

12:00

BW

2.4k

SFT

VFO

FIL2

USB

TX

CW

21.076.50

12:00

The transceiver has a keypad for direct frequency
entry as described right.

q Push [(F-INP)ENT].

•“ ” appears.

w Input the desired frequency.

•Push [(GENE)•] to input “ • (decimal point)” between
the MHz units and kHz units.

e Push [(F-INP)ENT] to set the input frequency.

•To cancel the input, push [MAIN/SUB] instead of

[(F-INP)ENT].

[EXAMPLES]

Band keys

Tuning dial

ANT

1

METER

Po

2.4k

BW

VFO

TX

wq.wpp.pp

1

SFT

0

USB

21.076.50

FIL2

CW

qw:pp

12:00

ANT

1

METER

Po

2.4k

BW

VFO

TX

wq.wot.pp

1

SFT

0

USB

21.076.50

FIL2

CW

qw:pp

12:00

Keypad

14.025 MHz

F-INP

1 04 2• 5

ENT

18.0725 MHz

F-INP

ENT

1

706 kHz

5.100 MHz

7.000 MHz

21.280 21.245

F-INP

F-INP

F-INP

F-INP

F-INP

F-INP

08 7• 2 5

F-INP

7

7 0• 6

2 4• 5

ENT

ENT

ENT

ENT

• 15

ENT

F-INP

F-INP

ENT

F-INP

F-INP

ENT

F-INP

ENT

ENT

ENT