ICOM orporated IC-756PRO Amateur Radio Transceiver User Manual IC 756PRO IM 1

ICOM Incorporated Amateur Radio Transceiver IC 756PRO IM 1

Contents

Manual

INSTRUCTION MANUAL
HF/50 MHz
ALL MODE TRANSCEIVER
i756PRO
i
IMPORTANT
READ THIS INSTRUCTION MANUAL
CAREFULLY before attempting to operate the
transceiver.
SAVE THIS INSTRUCTION MANUAL. This
manual contains important safety and operating in-
structions for the IC-756PRO.
EXPLICIT DEFINITIONS
RWARNING HIGH VOLTAGE! NEVER attach
an antenna or internal antenna connector during trans-
mission. This may result in an electrical shock or burn.
RNEVER 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.
NEVER expose the transceiver to rain, snow or any
liquids.
AVOID using or placing the transceiver in areas with
temperatures below –10°C (+14°F) or above +60°C
(+140°F). Be aware that temperatures on a vehicle’s
dashboard can exceed 80°C (+176°F), resulting in per-
manent damage to the transceiver if left there for ex-
tended periods.
AVOID placing the transceiver in excessively dusty en-
vironments or in direct sunlight.
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 chil-
dren.
During mobile operation, DO NOT operate the trans-
ceiver without running the vehicle’s engine. When
transceiver power is ON and your vehicle’s engine is
OFF, the vehicle’s battery will soon become exhausted.
Make sure the transceiver power is OFF before start-
ing the vehicle. This will avoid possible damage to the
transceiver by ignition voltage spikes.
During maritime mobile operation, keep the transceiver
and microphone as far away as possible from the mag-
netic navigation compass to prevent erroneous indica-
tions.
BE CAREFUL! The heatsink will become hot when
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 lin-
ear amplifier’s maximum input level, otherwise, the lin-
ear amplifier will be damaged.
Use Icom microphones only (supplied or optional).
Other manufacturer’s microphones have different pin
assignments, and connection to the IC-756PRO may
damage the transceiver.
PRECAUTIONS
Versions of the IC-756PRO which display the “CE”
symbol on the serial number seal, comply with the
European harmonised standard ETS300 684
(EMC product standard for Commercially Available
Amateur Radio Equipment).
WORD
R
WARNING
CAUTION
NOTE
DEFINITION
Personal injury, fire hazard or electric
shock may occur.
If disregarded, inconvenience only.
No risk of personal injury, fire or
electric shock.
Equipment damage may occur.
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
SUPPLIED ACCESSORIES
The transceiver comes with the following accessories.
Qty.
qDC power cable (OPC-025D) ............................ 1
wHand microphone (HM-36) ................................ 1
eSpare fuses (FGB 30 A) .................................... 2
rSpare fuse (FGB 5 A) ........................................ 1
tCW keyer plug (AP-330) .................................... 1
1
1
TABLE OF CONTENTS
qwe
r
t
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 .................................... 12
3 INSTALLATION AND
CONNECTIONS ................... 14–21
■Unpacking .................................... 14
■Selecting a location ...................... 14
■Grounding ..................................... 14
■Antenna connection ..................... 14
■Required connections ................... 15
■Advanced connections ................. 16
■Power supply connections ............ 17
■Linear amplifier connections ......... 18
■Transverter jack information ......... 19
■External antenna selector or
antenna tuner connections ........... 20
■FSK and AFSK (SSTV)
connections .................................. 21
4 FREQUENCY SETTING ....... 22–25
■When first applying power
(CPU resetting) ............................. 22
■Initial settings ................................ 22
■VFO description ............................ 23
■Frequency setting with the
tuning dial ..................................... 24
■Direct frequency entry with
the keypad .................................... 24
■Advanced tuning functions ........... 25
5 RECEIVE AND TRANSMIT .. 26–49
■Mode selection ............................. 26
■Twin PBT operation ...................... 26
■Notch function .............................. 27
■Noise reduction ............................ 27
■Noise blanker ............................... 27
■RTTY filter/Twin peak filter ........... 28
■CW reverse mode ......................... 28
■RTTY reverse mode ..................... 28
■CW pitch control ........................... 29
■IF filter selection ........................... 29
■AGC function ................................ 30
■Dualwatch operation ..................... 31
■Split frequency operation .............. 32
■Quick split function ....................... 33
■RIT and ∂TX ................................ 34
■Monitor function ............................ 35
■VOX function ................................. 35
■Meter function ............................... 36
■SWR reading ................................ 36
■Speech compressor ..................... 37
■Digital voice recorder .................... 38
■RTTY decoder .............................. 41
■RTTY tuning meter ....................... 41
■Electronic CW keyer ..................... 42
■Memory keyer ............................... 43
■Spectrum scope screen ............... 44
■Automatic antenna selection ........ 45
■Dial lock function .......................... 45
■Repeater operation ....................... 46
■Tone squelch operation ................ 47
■Antenna tuner operation ............... 48
■Optional external tuner
operation ...................................... 49
6 MEMORY OPERATION ........ 50–55
■Memory channels ......................... 50
■Memory channel selection ........... 50
■Memory channel screen ............... 51
■Memory channel programming ..... 52
■Frequency transferring ................. 53
■Memory names ............................ 54
■Memory clearing ........................... 54
■Memo pads ................................... 55
7 SCANS ................................. 56–61
■Scan types .................................... 56
■Preparation ................................... 56
■Programmed scan operation ........ 57
■∂F scan operation ........................ 57
■Fine programmed scan/
fine ∂F scan ................................. 58
■Memory scan operation ................ 58
■Select memory scan operation ..... 59
■Setting select memory channels .. 59
■Scan set mode ............................. 60
■Tone scan ..................................... 61
8 CLOCK AND TIMERS .......... 62–63
■Setting the current time ................ 62
■Setting power-on time .................. 62
■Setting power-off period ............... 63
■Timer operation ............................ 63
9 SET MODE ........................... 64–72
■Set mode description ................... 64
■Level set mode ............................. 65
■Display set mode .......................... 66
■Timer set mode ............................ 67
■Miscellaneous (others) set mode .. 68
10 OPTION INSTALLATION ............ 73
■Opening the transceiver’s case .... 73
■UT-102 VOICE SYNTHESIZER
UNIT .............................................. 73
11 MAINTENANCE ................... 74–76
■Troubleshooting ............................ 74
■Fuse replacement ......................... 75
■Clock backup battery
replacement .................................. 75
■Tuning dial brake adjustment ........ 76
■Frequency calibration
(approximate) ................................ 76
12 INTERNAL VIEWS ...................... 77
13 CONTROL COMMAND ........ 78–79
■Remote jack (CI-V) information .... 78
14 SPECIFICATIONS ....................... 80
15 OPTIONS ..................................... 81
■Front panel
qPOWER SWITCH [POWER/TIMER]
➥Push momentarily to turn power ON.
•Turn the optional DC power supply ON in advance.
•A/D convertor calibration of the DSP unit starts and it
takes 10 sec.
➥Push momentarily to toggle the timer function ON
and OFF. (p. 63)
•The power switch lights while the timer function is ON.
➥Push for 2 sec. to turn power OFF.
wTRANSMIT SWITCH [TRANSMIT]
Selects transmitting or receiving.
•The [TX] indicator lights red while transmitting and the
[RX] indicator lights green when the squelch is open.
eHEADPHONE JACK [PHONES]
Accepts headphones.
•Output power: 5 mW with an 8 Ωload.
•When headphones are connected, the internal speaker
or connected external speaker does not function.
rELECTRONIC KEYER JACK [ELEC-KEY] (p. 42)
Accepts a paddle to activate the internal electronic
keyer for CW operation.
•Selection between the internal electronic keyer, bug-key
and straight key operation can be made in keyer set
mode. (p. 42)
•A straight key jack is separately available on the rear
panel. See [KEY] on p. 12.
•Keyer polarity (dot and dash) can be reversed in keyer
set mode. (p. 42)
•4-channel memory keyer is available for your conve-
nience. (p. 43)
tMICROPHONE CONNECTOR [MIC]
Accepts the supplied or optional microphone.
•See p. 81 for appropriate microphones.
•See p. 9 for microphone connector information.
yAF CONTROL [AF] (inner control)
Varies the audio output level from the speaker.
uMIC GAIN CONTROL [MIC GAIN]
Adjusts microphone input gain.
•The transmit audio tone in SSB mode can be adjusted
in set mode. (p. 65)
✔
How to set the microphone gain.
Set the [MIC] control so that the ALC meter sometimes
swings during normal voice transmission in SSB mode.
MIC GAIN
Recommended level for
an Icom microphone
IncreasesDecreases
AF RF/SQL
No audio output Max. audio output
Decreases Increases
(dot)
(com)
(dash)
2
2
PANEL DESCRIPTION
TIMER
POWER
TRANSMIT
PHONES
ELEC-KEY
MIC
TUNER MONITOR NB NR
AF BAL NRRF/SQL
MIC GAIN RF POWER COMP KEY SPEED BK-IN DELAY
F-1 F-2 F-3 F-4 F-5
HF/50MHz TRANSCEIVER
i756PRO
SSB
CW/RTTY
AM/FM FILTER EXIT
q
w
e
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t
!2!3!4!5!6
yi !1o!0u
iRF 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. 68)
•When setting as RF gain/squelch control
While rotating the RF gain control, noise may be
heard. This comes from the DSP unit and does not
indicate an equipment malfunction.
oRF POWER CONTROL [RF POWER]
Continuously varies the RF output power from min-
imum (5 W*) to maximum (100 W*).
*AM mode: 5 W to 40 W
!0 BALANCE CONTROL [BAL] (inner control; p. 31)
Adjusts the audio output balance between main and
sub readout frequencies while in dualwatch.
!1 NOISE REDUCTION LEVEL CONTROL [NR]
(outer control; p. 27)
Adjusts the noise reduction level when the noise re-
duction is in use. Set for maximum readability.
!2 NOISE REDUCTION SWITCH [NR] (p. 27)
Toggles the noise reduction ON and OFF.
!3 NOISE BLANKER SWITCH [NB] (p. 27)
Toggles the noise blanker ON and OFF. The noise
blanker reduces pulse-type noise such as that gen-
erated by automobile ignition systems.This function
cannot be used for FM, or non-pulse-type noise.
!4 S/RF METER (p. 36)
Shows the signal strength while receiving. Shows
the relative output power, SWR, ALC or compres-
sion levels while transmitting.
!5 MONITOR SWITCH [MONITOR] (p. 35)
Monitors your transmitted IF signal.
•The CW sidetone functions when [MONITOR] is OFF in
CW mode.
!6 ANTENNA TUNER SWITCH [TUNER] (p. 48)
➥Turns the antenna tuner ON and OFF (bypass)
when pushed momentarily.
➥Starts to tune the antenna manually when
pushed for 2 sec.
•When the tuner cannot tune the antenna, the tuning
circuit is bypassed automatically after 20 sec.
Noise blanker OFF Noise blanker ON
NB NB
Noise reduction OFF Noise reduction ON
NR NR
BAL NR
Decreases
OFF
Increases
BAL NR
Increases main
readout gain Increases sub
readout gain
RF POWER
IncreasesDecreases
MODE
SSB, CW
RTTY
AM, FM
AUTO
RF GAIN
SQL
SQL
SET MODE SETTING
SQL
SQL
RF GAIN + SQL
RF GAIN + SQL
RF GAIN + SQL
Recommended level
Minimum RF gain
Adjustable
range
RF gain
adjustable
range
Maximum
RF gain
Maximum
RF gain
Squelch is
open.
S-meter
squelch
S-meter squelch
threshold
Noise squelch
threshold
(FM mode)
Shallow Deep
S-meter
squelch
Noise squelch (FM mode)
Noise squelch (FM mode)
Squelch is
open.
3
2
PANEL DESCRIPTION
•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.)
4
2PANEL DESCRIPTION
NB NR
BAL NR
COMP KEY SPEED BK-IN DELAY
LOCKTX
RX
TWIN PBT
CW PITCH
F-1 F-2 F-3 F-4 F-5 SPEECH LOCK
RIT/ TX
TXRIT CLEAR
SPLIT
MP-W MP-R
DUAL
WATCH
VFO/
MEMO
MAIN/
SUB
CHANGE
1.8 13.5 273
10 414 518 6
21 724 828 9
GENE
•50 0F-INPENT
Y
Z
MW
M-CL
TS
XFC
EIVER
i756PRO
PBT CLR NOTCH
NOTCH
SSB
CW/RTTY
AM/FM FILTER EXIT
@6@7
@0!9!8!7 @1 @4@3@2 @5
@8@9
■Front panel (continued)
!7 COMPRESSION LEVEL CONTROL [COMP]
(p. 37)
Adjusts the speech compression level in SSB.
!8 ELECTRONIC CW KEYER SPEED CONTROL
[KEY SPEED] (p. 42)
Adjusts the internal electronic CW keyer’s speed.
•6 wpm (min.) to 60 wpm (max.) can be set.
!9 SEMI BREAK-IN DELAY CONTROL
[BK-IN DELAY]
Adjusts the transmit-to-receive switching delay time
for CW semi break-in operation.
@0 MODE SWITCHES
Selects the desired mode. (p. 26)
•Announces the selected mode when an optional UT-102
is installed. (pgs. 71, 73)
➥Selects USB and LSB mode alternately.
➥Toggles SSB and SSB data mode (USB-
D, LSB-D) when pushed for 2 sec.
➥Selects CW and RTTY mode alternately.
➥Toggles CW and CW-R (CW reverse)
mode when pushed for 2 sec. in CW
mode.
➥Toggles RTTY and RTTY-R (RTTY re-
verse) mode when pushed for 2 sec. in
RTTY mode.
➥Selects AM and FM mode alternately.
➥Toggles AM/FM and AM/FM data mode
(AM-D, FM-D) when pushed for 2 sec.
@1 LCD FUNCTION SWITCHES [F-1]–[F-5]
Push to select the function indicated in the LCD dis-
play above these switches.
•Functions vary depending on the operating condition.
@2 FILTER SWITCH [FILTER]
➥Selects one of 3 IF filter settings.
➥Enters the filter set mode when pushed for 2 sec.
@3 EXIT SWITCH [EXIT]
Exits from a set mode, etc. when pushed.
@4 SPEECH SWITCH [SPEECH] (pgs. 71, 73)
Announces the selected readout frequency when
an optional UT-102 is installed.
@5 TUNING DIAL (p. 24)
Changes the displayed frequency, selects set mode
items, etc.
@6 MAIN/SUB SWITCH [MAIN/SUB]
Selects the main or sub readout for access.
•The sub readout frequency is displayed in outline or
mesh font. The sub readout functions only during split
operation or dualwatch.
@7 VFO/MEMORY SWITCH [VFO/MEMO]
➥Toggles the selected readout operating mode be-
tween the VFO mode and memory mode when
pushed. (pgs. 23, 50)
➥Transfers the memory contents to VFO when
pushed for 2 sec. (p. 53)
AM/FM
CW/RTTY
CW/RTTY
SSB
BK-IN DELAY
Short delay for
high speed keying
(2 dot)
Long delay for
slow speed keying
(13 dot)
Slow Fast
KEY SPEED
COMP
Compression
level decreases Compression
level increases
5
2
PANEL DESCRIPTION
✔
What is the AGC?
The AGC controls receiver gain to produce a constant audio
output level, even when the received signal strength is varied
by fading, etc. Select “FAST”for tuning and select “MID”or
“SLOW”depending on the receiving condition.
➥Turns the VOX function ON and OFF
when pushed in non-CW modes. (p. 35)
➥Enters the VOX set mode when pushed
for 2 sec. in non-CW modes. (p. 35)
✔
What is the VOX function?
The VOX function (voice operated transmission) starts trans-
mission without pushing the transmit switch or PTT switch
when you speak into the microphone; then, automatically re-
turns to receive when you stop speaking.
➥Selects semi break-in, full break-in oper-
ation, or turns the break-in operation
OFF when pushed in CW mode.
✔
What is the break-in function?
The break-in function toggles transmit and receive with CW
keying. Full break-in (QSK) can monitor the receive signal
during keying.
➥Turns the RTTY filter ON and OFF in
RTTY mode. (p. 28)
•When the RTTY filter is turned ON, [TWIN
PBT] functions as the IF shift control.
➥Enters the RTTY filter set mode when
pushed for 2 sec. in RTTY mode. (p. 28)
✔
What is the IF shift?
The IF shift function electronically changes the center of the
IF (Intermediate Frequency) passband frequency to reject in-
terference. Only the inner control of [TWIN PBT] can be used
for the IF shift control.
➥Turns the speech compressor ON and
OFF in SSB mode. (p. 37)
➥Toggles the narrow, middle or wide trans-
mit filter when pushed for 2 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 dis-
tance communication or when propagation conditions are
poor.
➥Turns the 1⁄4function ON and OFF in CW
and RTTY modes. (p. 25)
•1⁄4function sets dial rotation to 1⁄4of normal
for fine tuning.
➥Toggles the tone encoder, tone squelch
function and no tone operation when
pushed in FM mode. (pgs. 46, 47)
➥Enters the tone set mode when pushed
for 2 sec. in FM mode. (pgs. 46, 47)
TONETONE
1/41/4
OFFOFF
COMPCOMP
OFFOFF
WIDEWIDE
RTTYRTTY
FILFIL
OFFOFF
BK-INBK-IN
OFFOFF
VOXVOX
OFFOFF
@8 MAIN/SUB CHANGE SWITCH [CHANGE]
➥Toggles the frequency and selected memory
channel between main and sub readouts when
pushed.
•Toggles between transmit frequency and receive fre-
quency when the split frequency function is ON. (p.
32)
➥Equalizes the sub readout frequency to the main
readout frequency when pushed for 2 sec.
@9 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.
➥Toggles the antenna connector selection
between ANT1/R and ANT2/R when
pushed. (p. 45)
➥Toggles the [RX ANT] (receive antenna)
ON and OFF when pushed for 2 sec.
When a transverter is in use, this [ANT]
does not function and ‘TRV’appears.
➥Selects RF power (Po), ALC, SWR or
COMP metering during transmit. (p. 36)
➥Toggles the multi-function digital meter
ON and OFF when pushed for 2 sec.
➥Selects one of 2 receive RF preamps or
bypasses them.
•“P. AMP1”activates 10 dB preamp for HF all
bands.
•“P. AMP2”activates 16 dB high-gain preamp
for 21 MHz band and above.
✔
What is the preamp?
The preamp amplifies received signals in the front end cir-
cuit to improve the S/N ratio and sensitivity. Select “P. AMP1”
or “P. AMP2”when receiving weak signals.
➥Selects 6 dB, 12 dB or 18 dB attenuator,
or bypasses them.
✔
What is the attenuator?
The attenuator prevents a desired signal from distorting
when very strong signals are near the desired frequency, or
when very strong electric fields, such as from a broadcast-
ing station, are near your location.
➥Activates or selects fast, middle or slow
AGC time constant when pushed.
•“FAST”is only available for FM mode.
➥Enters the AGC set mode when pushed
for 2 sec.
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.
AGCAGC
MIDMID
ATTATT
OFFOFF
P.AMPP.AMP
OFFOFF
METERMETER
PoPo
ANTANT
1
6
2PANEL DESCRIPTION
@8 LOCK SWITCH [LOCK] (p. 45)
Turns the dial lock function ON and OFF.
@9 RIT/∂∂TX CONTROL [RIT/∂∂TX] (p. 34)
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).
#0 RIT SWITCH [RIT] (p. 34)
➥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 2 sec.
✔
What is the RIT function?
The RIT (Receiver Incremental Tuning) shifts the receive fre-
quency without shifting the transmit frequency.
This is useful for fine tuning stations calling you on an off-fre-
quency or when you prefer to listen to slightly different-
sounding voice characteristics, etc.
#1 ∂∂TX SWITCH [∂∂TX] (p. 34)
➥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 fre-
quency when pushed for 2 sec.
✔
What is the
∂∂
TX function?
The ∂TX shifts the transmit frequency without shifting the re-
ceive frequency. This is useful for simple split frequency op-
eration in CW, etc.
#2 CLEAR SWITCH [CLEAR] (p. 34)
Clears the RIT/∂TX shift frequency when pushed
for 2 sec.
#3 CW PITCH CONTROL [CW PITCH]
(outer control; p. 29)
Shifts the received CW audio pitch and monitored
CW audio pitch without changing the operating fre-
quency.
#4 MANUAL NOTCH FILTER CONTROL [NOTCH]
(inner control; p. 27)
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 : –900 Hz + CW pitch freq. to 4200 Hz + CW
pitch freq.
AM : –5100 Hz to 5100 Hz
NOTCH
CW PITCH
Lower frequency Higher frequency
Approx. 300 Hz Approx. 900 Hz
Lower frequency Higher frequency
NOTCH
CW PITCH
RIT/∂TX
Low shift High shift
NB NR
BAL NR
COMP KEY SPEED BK-IN DELAY
LOCKTX
RX
TWIN PBT
CW PITCH
F-1 F-2 F-3 F-4 F-5 SPEECH LOCK
RIT/ TX
TXRIT CLEAR
SPLIT
MP-W MP-R
DUAL
WATCH
VFO/
MEMO
MAIN/
SUB
CHANGE
1.8 13.5 273
10 414 518 6
21 724 828 9
GENE
•50 0F-INPENT
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MW
M-CL
TS
XFC
CEIVER
i756PRO
PBT CLR NOTCH
NOTCH
SSB
CW/RTTY
AM/FM FILTER EXIT
$5 $4 $3 #9 #8 #7
#2
#4
#3
#1
#6
#5
#0
@9
@8
$0$1$2
■Front panel (continued)
7
2
PANEL DESCRIPTION
#5 PBT CLEAR SWITCH [PBT CLR] (p. 26)
Clears the PBT settings when pushed for 2 sec.
•The [PBT CLR] indicator appears when PBT is in use.
#6 NOTCH SWITCH [NOTCH] (p. 27)
➥Toggles 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.
✔
What is the notch function?
The notch function eliminates unwanted CW or AM carrier
tones while preserving the desired signal’s audio response.
The filtering frequency is adjusted to effectively eliminate un-
wanted tones via the DSP circuit.
#7 PASSBAND TUNING CONTROLS [TWIN PBT]
Adjust the receiver’s “passband width”of the DSP
filter. (p. 26)
•Passband width and shift frequency are displayed in the
LCD.
•Push [PBT CLR] for 2 sec. to clear the settings when not
in use.
•Variable range is set to the 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.
#8 LOCK INDICATOR [LOCK] (p. 45)
Lights when the dial lock function is activated.
#9 MEMO PAD-READ SWITCH [MP-R] (p. 55)
Each push 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. 71)
$0 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 fre-
quencies in each band.
➥After pushing [F-INP], enters a keyed frequency
or memory channel. Pushing [(F-INP)ENT] or
[Y]/[Z] is necessary at the end. (pgs. 24, 50)
•e.g. to enter 14.195 MHz, push [F-INP] [1] [4] [•] [1]
[9] [5] [(F-INP)ENT].
$1 MEMO PAD-WRITE SWITCH [MP-W] (p. 55)
Programs the selected readout frequency and op-
erating mode into a memo pad.
•The 5 most recent entries remain in memo pads.
•The transmit frequency is programmed when pushed to-
gether with [XFC].
•The memo pad capacity can be expanded from 5 to 10
in set mode for your convenience. (p. 71)
$2 DUALWATCH SWITCH [DUALWATCH] (p. 31)
➥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 2 sec. (Quick dualwatch func-
tion)
•The quick dualwatch function can be turned OFF
using set mode. (p. 68)
$3 SPLIT SWITCH [SPLIT] (p. 32)
➥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 2 sec. in non-FM modes. (Quick split function)
•The offset frequency is shifted from the main readout
frequency in FM mode. (pgs. 46, 69)
•The quick split function can be turned OFF using set
mode. (p. 68)
➥Turns the split function ON and shifts the sub
readout frequency after inputting an offset (±4
MHz in 1 kHz steps).
$4 RECEIVE INDICATOR [RX]
Lights green while receiving a signal and when the
squelch is open.
$5 TRANSMIT INDICATOR [TX]
Lights red while transmitting.
PBT1
PBT2
TWIN PBT
Low cut High cutCenter
TWIN PBT TWIN PBT TWIN PBT
–+
NOTCHNOTCH
Notch OFF Notch ON
8
2PANEL DESCRIPTION
$6 LCD FUNCTION DISPLAY (See p. 10 for details.)
Shows the operating frequency, function switch
menus, spectrum screen, memory channel screen,
set mode settings, etc.
$7 MEMORY UP/DOWN SWITCHES [YY]/[ZZ](p. 50)
➥Select the memory channel number for the se-
lected readout.
•Memory channels can be selected both in VFO and
memory modes.
➥Select the desired memory channel directly after
pushing [F-INP] and a memory channel number.
$8 MEMORY WRITE SWITCH [MW] (p. 52)
Stores the selected readout frequency and operat-
ing mode into the displayed memory channel when
pushed for 2 sec.
•This function is available both in VFO and memory
modes.
$9 MEMORY CLEAR SWITCH [M-CL] (p. 54)
Clears the selected readout memory channel con-
tents when pushed for 2 sec. in memory mode.
•The channel becomes a blank channel.
•This switch does not function in VFO mode.
%0 QUICK TUNING SWITCH [TS] (p. 25)
➥Turns the quick tuning step ON and OFF.
•While the quick tuning indicator is displayed, the fre-
quency can be changed in programmed kHz steps.
•0.1, 1, 5, 9, 10, 12.5, 20 and 25 kHz quick tuning
steps are available.
➥While the quick tuning step is OFF, turns the 1 Hz
step ON and OFF when pushed for 2 sec.
•1 Hz indications appear in both readouts and the fre-
quency can be changed in 1 Hz steps.
➥While the quick tuning step is ON, enters the
quick tuning step set mode when pushed for 2
sec.
%1 TRANSMIT FREQUENCY CHECK SWITCH
[XFC]
Monitors the transmit frequency when pushed and
held when the split frequency function is ON.
•While pushing this switch, the transmit frequency can be
changed with the tuning dial, keypad, memo pad or the
[Y]/[Z] switches.
•When the split lock function is turned ON, pushing [XFC]
cancels the dial lock function. (p. 69)
ANT
1
METER
Po
BWBW 2.4k2.4k SFTSFT 0
FIL2FIL2
qw:pp
TXTX
CWCW
qr≥qpp≥pp
21.076.5021.076.50
VFOVFO
USBUSB
1
Quick tuning indicator
NB NR
BAL NR
COMP KEY SPEED BK-IN DELAY
LOCKTX
RX
TWIN PBT
CW PITCH
F-1 F-2 F-3 F-4 F-5 SPEECH LOCK
RIT/ TX
TXRIT CLEAR
SPLIT
MP-W MP-R
DUAL
WATCH
VFO/
MEMO
MAIN/
SUB
CHANGE
1.8 13.5 273
10 414 518 6
21 724 828 9
GENE
•50 0F-INPENT
Y
Z
MW
M-CL
TS
XFC
EIVER
i756PRO
PBT CLR NOTCH
NOTCH
SSB
CW/RTTY
AM/FM FILTER EXIT
$7 $8 $9 %0 %1
$6
■Front panel (continued)
9
2
PANEL DESCRIPTION
■Microphone (HM-36)
qUP/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. 42)
wPTT SWITCH
Push and hold to transmit; release to receive.
q
w
•MICROPHONE CONNECTOR
(Front panel view)
•HM-36 SCHEMATIC DIAGRAM
CAUTION: DO NOT short pin 2 to ground as this
can damage the internal 8 V regulator.
+
+
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
y GND (PTT ground)
t PTT
r Main readout squelch switch
q Microphone input
w +8 V DC output
e Frequency up/down
u GND
(Microphone ground)
i Main readout AF output
(varies with [AF]/[BAL])
Max. 10 mA
Ground
Ground through 470 Ω
“LOW” level
“HIGH” level
+8 V DC output
Frequency up
Frequency down
Squelch open
Squelch closed
[MIC]
PIN NO.
w
e
r
FUNCTION DESCRIPTION
qTX INDICATOR
Indicates the frequency readout for transmit.
wVFO/MEMORY CHANNEL INDICATOR
(pgs. 23, 50)
Indicates the VFO mode or selected memory chan-
nel number.
eSELECT MEMORY CHANNEL INDICATOR
(p. 59)
Indicates the displayed memory channel is set as a
select memory channel.
rMULTI-FUNCTION SWITCH GUIDE
Indicates the function of the multi-function switches.
tLCD FUNCTION SWITCH GUIDE
Indicates the function of the LCD function switches
([F-1]–[F-5]).
yMULTI-FUNCTION SCREEN (p. 11)
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.
uMEMORY CHANNEL READOUTS (p. 50)
➥Show the selected memory channel contents in
VFO mode.
➥Show the VFO contents in memory mode.
iFREQUENCY READOUTS (p. 24)
Show the operating frequency.
•Outline characters are used for non-accessing readout.
oCLOCK READOUT (p. 62)
Shows the current time.
!0 RTTY TUNING INDICATOR (p. 41)
Shows the tuning level in RTTY mode.
!1 QUICK TUNING INDICATOR (p. 25)
Appears when the quick tuning step function is in
use.
!2 PASSBAND WIDTH INDICATOR (p. 26)
Graphically displays the passband width for twin
PBT operation and center frequency for IF shift op-
eration.
!3 IF FILTER INDICATOR (p. 29)
Shows the selected IF filter number.
!4 SHIFT FREQUENCY INDICATOR (p. 26)
Shows the shift frequency of the IF filter.
!5 MODE INDICATOR (p. 26)
Shows the selected mode.
!6 BAND WIDTH INDICATOR (p. 29)
Shows the passband width of the IF filter.
10
2PANEL DESCRIPTION
ANTANT
1
METERMETER
PoPo
P.AMPP.AMP
1
ATTATT
OFFOFF
VOXVOX
OFFOFF
COMPCOMP
OFFOFF
WIDEWIDE
AGCAGC
MIDMID
SUBSUB
MARKERMARKER
+12.5k+12.5k
-12.5k-12.5k SPECTRUM SCOPESPECTRUM SCOPE
SPANSPAN ATTATT MARKERMARKER HOLDHOLD SETSET
BWBW 2.4k2.4k SFTSFT 0
USBUSB
qw:pp
VFOVFO 21.085.0021.085.00
TX
CWCW
FIL2
qr≥qqy≥pp
qr≥qpp≥pp
56ß
USB
1ß 21.085.0021.085.00 CWCW
VFO
FIL2FIL2
GridGrid
10k10k
10dB10dB
t
i
i
!6 !4!5 !2!3 !1 !0 o
y
u
u
r
q
w
e
w
■LCD display
11
2
PANEL DESCRIPTION
ANTANT
1
METERMETER
PoPo
P.AMPP.AMP
1
ATTATT
OFFOFF
VOXVOX
OFFOFF
COMPCOMP
OFFOFF
WIDEWIDE
SCOPESCOPE VOICEVOICE MEMORYMEMORY SCANSCAN SETSET
BWBW 2.4k2.4k SFTSFT 0
VFOVFO FIL2FIL2
USBUSB
qw:pp
AGCAGC
MIDMID
1
TXTX
VFOVFO
1
USBUSB
CWCW
CWCW
FIL2FIL2
qr≥qpp≥pp
qr≥qpp≥pp
--. ---. ----. ---. --
--. ---. ----. ---. --
VOXVOX
OFFOFF
COMPCOMP
OFFOFF
WIDEWIDE
SPANSPAN MARKERMARKER HOLDHOLD SETSET
AGCAGC
MIDMID GridGrid
2.5k2.5k
10dB10dB
+12. 5k+12. 5k
-12. 5k-12. 5k SPECTRUM SCOPESPECTRUM SCOPE
PLAYPLAY MIC RECMIC REC TX LEV.TX LEV. SETSET
VOXVOX
OFFOFF
COMPCOMP
OFFOFF
WIDEWIDE
AGCAGC
MIDMID
VOICE RECORDERVOICE RECORDER
SENDSEND EDITEDIT 001001 CW KEYCW KEY
BK-INBK-IN
OFFOFF
1/41/4
OFFOFF
AGCAGC
MIDMID
MEMORY KEYERMEMORY KEYER
ROLLROLL SETSET SELECTSELECT NAMENAME WIDEWIDE
VOXVOX
OFFOFF
COMPCOMP
OFFOFF
WIDEWIDE
RTTYRTTY
FILFIL
ONON
AGCAGC
MIDMID
MEMORYMEMORY
LEVELLEVEL DISPDISP TIMETIME OTHERSOTHERS
VOXVOX
OFFOFF
COMPCOMP
OFFOFF
WIDEWIDE
AGCAGC
MIDMID
SET MODESET MODE
F-1
F-1
F-2
F-2
F-2
F-2
F-3
F-3
F-4
F-4
F-4
F-5
F-5
VOXVOX
OFFOFF
COMPCOMP
OFFOFF
WIDEWIDE
MEMOMEMO
∂
FSELECTSELECT
∂
F SPANF SPAN SETSET
AGCAGC
MIDMID
SCANSCAN
VOXVOX
OFFOFF
COMPCOMP
OFFOFF
WIDEWIDE
PROGPROG
∂
FFINEFINE
∂
F SPANF SPAN SETSET
AGCAGC
MIDMID
SCANSCAN
ATTATT
HOLDHOLD CLRCLR WIDEWIDE
ADJADJ
1/41/4
OFFOFF
AGCAGC
MIDMID
•Spectrum scope screen (p. 44)
•Voice recorder screen (p. 38)
•Memory channel screen (p. 51)
•Memory channel scan screen (p. 58) •RTTY decoder screen (p. 41)
•Programmed scan screen (p. 57)
•Set mode screen (p. 64)
•Memory keyer screen (p. 42)
•Start up screen
9999 --.---.----.---.-- ------------ ------
P1P1 00.500.000.500.00 LSBLSB FL2 SCAN EDGEFL2 SCAN EDGE
P2P2 29.999.9929.999.99 USBUSB FL2 SCAN EDGEFL2 SCAN EDGE
 1 --.---.----.---.-- ------------ ------
 2 --.---.----.---.-- ------------ ------
 3 --.---.----.---.-- ------------ ------
 4 --.---.----.---.-- ------------ ------
SETSETMODEMODEMENUMENU
LEVELLEVELTXTXTone,Monitor,SideTone,Monitor,SideToneToneetcetc
DISPDISPBright,Contrast,Style,FontBright,Contrast,Style,Fontetcetc
TIMETIMEClock/TimerClock/Timer
OTHERSOTHERSOtherOtherSetSetModeMode
MEMORY KEYER MENUMEMORY KEYER MENU
SENDSENDMax.54Max.54CharactersCharactersx4ch4ch
EDITEDITMemoryMemoryEditorEditor
001001001001StyleStyleContestContestNumberNumber
CWCWKEYKEYMemo-key,Elec-key,CWMemo-key,Elec-key,CWWaveWaveFormFormSetSet
********RTTYRTTYDecodeDecodeMonitorMonitor********
45bps45bpsBAUDOTBAUDOTMark=2125,Mark=2125,Shift=170Shift=170
UnShiftUnShiftOnOnSpaceSpacesupportsupport(SET-OTHERS)(SET-OTHERS)
NewNewLineLineCodeCodeselectableselectable(SET-OTHERS)(SET-OTHERS)
IfIfRTTY-FILRTTY-FILisisOFF,OFF,PleasePleaseturnturnON.ON.
----------------------------------------------------------------------------------------
∂FSpanSpan:±±10kHz10kHz
ProgrammedProgrammedP1:P1:0.500.00MHz0.500.00MHz
scanscanedgesedgesP2:P2:29.999.99MHz29.999.99MHz
∂FSpanSpan:±±10kHz10kHz
ProgrammedProgrammedP1:P1:0.500.00MHz0.500.00MHz
scanscanedgesedgesP2:P2:29.999.99MHz29.999.99MHz
VOICEVOICERECORDERRECORDERMENUMENU
PLAYPLAYTXTX15sec.15sec.x4ch4ch
RXRX15sec.15sec.x4ch4ch
MICMICRECRECMic Record/RecordMic Record/Recordcheckcheck
TXTXLEV.LEV.RecorderRecorderOutputOutputAdjustAdjust
SETSETAutoAutoMonitorMonitorSETSET
THRESHOLDTHRESHOLD 9
RTTY DECODERTTY DECODE
■Screen menu arrangement
The following screens can be selected from the start
up screen. Choose the desired screen using the fol-
lowing chart.
Pushing [EXIT] one or more times returns to the start
up screen. See p. 64 for set mode arrangement.
■Rear panel
qRECEIVE ANTENNA CONNECTOR [RX ANT]
(p. 16)
Connects a 50 Ωgeneral coverage antenna with an
RCA connector.
wTRANSVERTER JACK [XVERT] (p. 19)
External transverter input/output jack. Activated by
voltage applied to [ACC(2)] pin 6.
eTUNER 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.
rACCESSORY SOCKET 1 [ACC(1)]
tACCESSORY 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.13 for socket information.
ySTRAIGHT KEY JACK [KEY] (p. 15)
Accepts a straight key or external electronic keyer
with 1⁄4inch 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. 42)
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.
uCI-V REMOTE CONTROL JACK [REMOTE]
(p. 16)
➥Designed for use with a personal computer for re-
mote control of transceiver functions.
➥Used for transceive operation with another Icom
CI-V transceiver or receiver.
iEXTERNAL SPEAKER JACK [EXT SP]
(pgs. 16, 81)
Accepts an 4–8 Ωspeaker.
oALC INPUT JACK [ALC] (p. 19)
Connects to the ALC output jack of a non-Icom lin-
ear amplifier.
!0 SEND CONTROL JACK [SEND] (p. 19)
Goes to ground while transmitting to control exter-
nal equipment such as a linear amplifier.
•Max. control level: 16 V DC/2 A
!1 DC POWER SOCKET [DC 13.8V] (p. 15)
Accepts 13.8 V DC through the supplied DC power
cable (OPC-025D).
Rear panel
view +_
(+)
(_)
qw!0
!1
ertyuio
!4 !3 !2
12
2PANEL DESCRIPTION
!2 ANTENNA CONNECTOR 1 [ANT1]
!3 ANTENNA CONNECTOR 2 [ANT2] (pgs. 14, 15)
Accept a 50 Ωantenna with a PL-259 connector.
When using an optional AH-4 HF/50 MHz AUTO-
MATIC ANTENNA TUNER 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.
DACC SOCKETS
!4 GROUND TERMINAL [GND] (pgs. 14, 15)
Connect this terminal to a ground to prevent electri-
cal shocks, TVI, BCI and other problems.
13
2
PANEL DESCRIPTION
ACC(1) PIN NO.
PIN NAME
DESCRIPTION SPECIFICATIONS
1RTTY Controls RTTY keying. “HIGH” level : More than 2.4 V
“LOW” level : Less than 0.6 V
Output current : Less than 2 mA
2GND Connects to ground. Connected in parallel with ACC(2) pin 2.
3SEND
Input/output pin.
Goes to ground when transmitting.
When grounded, transmits.
Ground level : –0.5 V to 0.8 V
Output current : Less than 20 mA
Input current (Tx) : Less than 200 mA
Connected in parallel with ACC(2) pin 3.
4MOD Modulator input.
Connects to a modulator. Input impedance : 10 kΩ
Input level : Approx. 100 mV rms
5AF AF detector output.
Fixed, regardless of [AF] position in
default settings. (see notes below)
Output impedance : 4.7 kΩ
Output level : 100 to 300 mV rms
6SQLS Squelch output.
Goes to ground when squelch
opens.
Squelch open : Less than 0.3 V/5 mA
Squelch closed : More than 6.0 V/100 µA
713.8 V 13.8 V output when power is ON. Output current : Max. 1 A
Connected in parallel with ACC(2) pin 7.
8ALC ALC voltage input. Control voltage : –4 to 0 V
Input impedance : More than 10 kΩ
Connected in parallel with ACC(2) pin 5.
Rear panel
view
1
2
3
45
67
8
ACC(2) PIN NO.
PIN NAME
DESCRIPTION SPECIFICATIONS
18 V Regulated 8 V output. Output voltage : 8 V ±0.3 V
Output current : Less than 10 mA
2GND Same as ACC(1) pin 2.
3SEND Same as ACC(1) pin 3.
4BAND Band voltage output.
(Varies with amateur band) Output voltage : 0 to 8.0 V
5ALC Same as ACC(1) pin 8.
6TRV Activates [XVERT] input/output
when “HIGH” voltage is applied.
713.8 V Same as ACC(1) pin 7.
Rear panel
view
1
2
3
45
67
Input impedance : More than 10 kΩ
Input voltage : 2 to 13.8 V
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. 65)
3
14
INSTALLATION 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 equip-
ment included with the IC-756PRO, see ‘Supplied ac-
cessories’on p. 1 of this manual.
■Selecting a location
Select a location for the transceiver that allows ade-
quate air circulation, free from extreme heat, cold, or
vibrations, and away from TV sets, TV antenna ele-
ments, radios and other electro-magnetic sources.
The base of the transceiver has an adjustable stand for
desktop use. Set the stand to one of two angles de-
pending on your operating conditions.
■Grounding
To prevent electrical shock, television interference
(TVI), broadcast interference (BCI) and other prob-
lems, ground the transceiver through the GROUND
terminal on the rear panel.
For best results, connect a heavy gauge wire or strap
to a long earth-sunk copper rod. Make the distance be-
tween the [GND] terminal and ground as short as pos-
sible.
RWARNING: NEVER connect the [GND]
terminal to a gas or electric pipe, since the connec-
tion could cause an explosion or electric shock.
■Antenna connection
For radio communications, the antenna is of critical im-
portance, along with output power and sensitivity. Se-
lect antenna(s), such as a well-matched 50 Ωantenna,
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 transis-
tor. In this case, an antenna tuner is useful to match
the transceiver and antenna. Low SWR allows full
power for transmitting even when using the antenna
tuner. The IC-756PRO has an SWR meter to monitor
the antenna SWR continuously.
PL-259 CONNECTOR INSTALLATION EXAMPLE
30 mm ≈9⁄8in 10 mm ≈3⁄8in 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 con-
ductor.
q
w
e
r
15
3
INSTALLATION AND CONNECTIONS
TIMER
POWER
TRANSMIT
PHONES
ELEC-KEY
MIC
TUNER MONITOR NB NR
AF BAL NRRF/SQL
MIC GAIN RF POWER COMP KEY SPEED BK-IN DELAY
LOCKTX
RX
TWIN PBT
CW PITCH
F-1 F-2 F-3 F-4 F-5
SPEECH LOCK
RIT/ TX
TXRIT CLEAR
SPLIT
MP-W MP-R
DUAL
WATCH
VFO/
MEMO
MAIN/
SUB
CHANGE
1.8 13.5 273
10 414 518 6
21 724 828 9
GENE
•50 0
F-INPENT
Y
Z
MW
M-CL
TS
XFC
HF/50MHz TRANSCEIVER
i756PRO
PBT CLR NOTCH
NOTCH
SSB
CW/RTTY
AM/FM FILTER EXIT
CW KEY
A straight key can be used
when the internal electronic
keyer is turned OFF in keyer
set mode. (p. 42)
MICROPHONES (p. 81)
SM-20HM-36
GROUND (p. 14)
Use the heaviest gauge wire
or strap available and make
the connection as short as
possible.
Grounding prevents electrical
shocks, TVI and other
problems.
ANTENNA 1, 2 (p. 14)
[Example]: ANT1 for 1.8–18 MHz bands
ANT2 for 21–50 MHz bands
DC POWER SUPPLY
STRAIGHT KEY
13.8 V DC
25 A
+_
■Required connections
•Front panel
•Rear panel
16
3INSTALLATION AND CONNECTIONS
TIMER
POWER
TRANSMIT
PHONES
ELEC-KEY
MIC
TUNER MONITOR NB NR
AF BAL NRRF/SQL
MIC GAIN RF POWER COMP KEY SPEED BK-IN DELAY
LOCKTX
RX
TWIN PBT
CW PITCH
F-1 F-2 F-3 F-4 F-5
SPEECH LOCK
RIT/ TX
TXRIT CLEAR
SPLIT
MP-W MP-R
DUAL
WATCH
VFO/
MEMO
MAIN/
SUB
CHANGE
1.8 13.5 273
10 414 518 6
21 724 828 9
GENE
•50 0
F-INPENT
Y
Z
MW
M-CL
TS
XFC
HF/50MHz TRANSCEIVER
i756PRO
PBT CLR NOTCH
NOTCH
SSB
CW/RTTY
AM/FM FILTER EXIT
HEADPHONES
MIC
The AFSK modulation signal
can be input from [MIC]. (p. 21)
ANTENNA 1, 2 (pgs. 18–20)
Connects a linear amplifier,
antenna selector, etc.
EXTERNAL SPEAKER (p. 81)
ACC SOCKETS (p. 13)
RX ANTENNA
TRANSVERTER
(p. 19)
Connects a transverter
for V/UHF band use.
SP-20
AH-4, AH-3
(p. 20)
AH-2b
[REMOTE] (pgs. 12, 72)
Used for computer control and transceive operation.
[SEND], [ALC]
(p. 19)
Used for connecting a
non-Icom linear ampli-
fier.
When using the AH-4 or AH-
3, it must be connected to
the [ANT1] connector.
■Advanced connections
•Front panel
•Rear panel
17
3
INSTALLATION AND CONNECTIONS
■Power supply connections
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.
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 25 A
Black
_Red
+
Transceiver
CONNECTING A VEHICLE BATTERY
12 V
battery Supplied
DC power cable
+ red
_ black
Crimp
Solder
Grommet
NEVER connect to
a 24 V battery.
NOTE: Use terminals for
the cable connections.
18
3INSTALLATION AND CONNECTIONS
■Linear amplifier connections Use the [ANT1] connector when connecting a linear
amplifier.
CONNECTING THE IC-PW1
Turn OFF the transceiver’s antenna tuner while tuning the IC-PW1’s tuner.
ANT
ACC-1
ANT2 ANT1 ACC(2) REMOTE
REMOTE
INPUT1
INPUT2 Connect
[INPUT2]
if necessary.
GND
GND
IC-PW1
IC-756PRO
Ground
AC outlet
(Non-European versions : 100–120/220–240 V
European version : 230 V)
Coaxial cable
(supplied with the IC-PW1)
Coaxial cable
(optional)
ACC cable (supplied with the IC-PW1)
Be sure to connect the cable
to the 7-pin ACC(2) jack.
Remote control cable (supplied with the IC-PW1)
To an
antenna
EXCITER
1 1&2
CONNECTING THE IC-4KL
Turn OFF the transceiver’s antenna tuner while tuning the IC-4KL’s tuner.
Transceiver
Ground
IC-4KL
Remote
controller
Coaxial cable (supplied with the IC-4KL)
ACC cable (supplied with the IC-4KL)
ACC
IC-4KL
Remote control cable
(supplied with the IC-4KL)
AC outlet (220–240 V)
To an
antenna
ANT1
ACC(2)
19
3
INSTALLATION AND CONNECTIONS
CONNECTING THE IC-2KL
CAUTION:
Set the transceiver output
power for 80 W max. with the
[RF POWER] control, other-
wise, a protection circuit will
activate.
OPC-118 (sold separately)
ACC(2)ACC(1)
Ground
To the IC-2KLPS
Coaxial cable (supplied with the IC-2KL)
ACC cable (supplied with the IC-2KL)
To an antenna
ANT1 Transceiver
IC-2KL
ANT
GND
CONNECTING A NON-ICOM LINEAR AMPLIFIER
RF OUTPUT RF INPUT
ALC
SEND
50 Ω coaxial cable
Transceiver
ANT1
ALC SEND
To an
antenna
Non-Icom linear amplifier
RWARNING:
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 trans-
ceiver 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 2 A. If this
level is exceeded, a large external relay must be used.
When 2 to 13.8 V is applied to pin 6 of [ACC(2)], the
[XVERT] jack is activated for transverter operation
and the antenna connectors do not receive or trans-
mit any signals. (p. 13)
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 information
20
3INSTALLATION AND CONNECTIONS
■External antenna selector or antenna tuner connections
CONNECTING THE EX-627
Coaxial cable (supplied with the EX-627)
ANT1
Ground
EX-627
ACC cable
(supplied with
the EX-627)
ACC(2)
CONNECTING THE AH-4 or AH-3
Coaxial cable (from the AH-4 or AH-3)
Long wire or optional AH-2b
Ground
Transceiver AH-4 or AH-3
ANT1 Control cable
CONNECTING THE IC-AT500 THROUGH THE IC-2KL
Transceiver
Ground
Coaxial cable
(supplied with the IC-2KL)
ACC cable
(supplied with the IC-2KL)
ACC cable
(supplied with the
IC-AT500)
IC-2KL
To the IC-2KLPSIC-AT500
OPC-118 (sold separately)
To an
antenna
ANT
GND
Coaxial cable
(supplied with
the IC-AT500)
ACC(1) ACC(2)
ANT1
•The AH-4 and AH-3 must be connected to [ANT1].
•The AH-3 can be used for the HF bands only, although the [ANT1] con-
nector is used for both HF and 50 MHz operation. Use a coaxial antenna
switch when you operate the 50 MHz band with the AH-3 connected.
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
45
67
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
45
67
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
6
7
8
21
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. 29)
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.
4
22
FREQUENCY SETTING
■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 fol-
lowing procedure.
Resetting CLEARS all programmed contents in
memory channels and returns programmed values
in set mode to default values.
qMake sure the transceiver power is OFF.
wWhile pushing [M-CL] and [F-INP], push [POWER]
for 2 sec. 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.
eCorrect 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.
[POWER] [M-CL]
[F-INP]
[METER]: Po
[ANT]: 1
[ATT]: OFF
[P.AMP]: 1
[PBT CLR]: OFF
[NOTCH]: OFF
[LOCK]: OFF
[AGC]: MID*1
[POWER]: OFF
[TUNER], [MONITOR],
[NB], [NR]: OFF
[COMP]*2: OFF WIDE;
[1/4],*2 [TONE]*2: OFF [VOX],*2 [BK-IN],*2
[RTTY FIL]*2: OFF
[AF]: Max. CCW
[RF/SQL]: 12 o’clock
[RF POWER]: Max. CW
[MIC GAIN]: 10–12 o’clock [BAL]: Center
*1 FAST in FM mode.
*2 Appears in some modes.
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 [DUAL
WATCH].
•Twin peak filter indicator “”: Push [RTTY FIL].
•Auto notch indicator “” : Push [NOTCH].
•Manual notch indicator “”: Push [NOTCH].
MNMN
ANAN
TPFTPF
DUAL-WDUAL-W
SPLITSPLIT
∂TXTX
RITRIT
Under cooler temperatures, the LCD may appear
dark and unstable after turning power ON. This is
normal and does not indicate any equipment mal-
function.
CW : Max. clockwise
CCW : Max. counterclockwise
23
4
FREQUENCY SETTING
■VFO description
VFO is an abbreviation of Variable Frequency Oscilla-
tor, and traditionally refers to an oscillator.
The transceiver’s VFO is somewhat different. The VFO
of the IC-756PRO 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. 55) or the
memory transfer function (see p. 53). You can also
change the frequency with the tuning dial and select
the operating mode with the mode switches.
During dualwatch or split frequency operation, the sub
VFO is functional (non-outline, non-spotted, larger fre-
quency characters). While pushing [XFC] during split
frequency operation, you can change the transmit
readout frequency with the keypad, memo pad-read
switch or the memory transfer function.
ANTANT
1
METERMETER
PoPo
BWBW 2.4k2.4k SFTSFT 0
VFOVFO FIL2FIL2
USBUSB
qw:pp
TXTX
1CWCW
qr≥qpp≥pp
21.076.5021.076.50
Transfer
Transfer Transfer
Change
21.295 MHz 28.025 MHz 7.001 MHz
KEYPAD
(BAND KEY) MEMORY
CHANNEL
MEMO PAD
TUNING DIAL
Select
MODE
SWITCHES
•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 au-
tomatically memorizes the new frequency or new op-
erating mode.
When a VFO is selected from another band or mem-
ory mode, the frequency and operating mode last
used for that VFO appear.
[EXAMPLE]
MEMORY MODE (pgs. 50–54)
Each memory channel shows a frequency and oper-
ating mode like a VFO. Even if the frequency or mode
is changed, the memory channel does not memorize
the new frequency or operating mode.
When the memory channel is selected from another
memory channel or VFO mode, the memorized fre-
quency and operating mode appear.
[EXAMPLE]
ANT
ANT
1
METER
METER
Po
Po
BW
BW
2.4k
2.4k
SFT
SFT
0
VFO
VFO
FIL2
FIL2
USB
USB
qw:pp
TX
TX
1CW
CW
qr≥qwe≥pp
21.076.50
21.076.50
ANT
ANT
1
METER
METER
Po
Po
BW
BW
500
500
SFT
SFT
0BPF
BPF
1FIL2
FIL2
CW
CW
qw:pp
TX
TX
VFO
VFO
USB
USB
wq≥puy≥tp
14.123.00
14.123.00
ANT
ANT
1
METER
METER
Po
Po
BW
BW
2.4k
2.4k
SFT
SFT
0
VFO
VFO
FIL2
FIL2
USB
USB
qw:pp
TX
TX
1CW
CW
qr≥qwe≥pp
21.076.50
21.076.50
ANT
ANT
1
METER
METER
Po
Po
BW
BW
2.4k
2.4k
SFT
SFT
0
VFO
VFO
FIL2
FIL2
USB
USB
qw:pp
TX
TX
1CW
CW
qr≥qpp≥pp
21.076.50
21.076.50
ANT
ANT
1
METER
METER
Po
Po
BW
BW
2.4k
2.4k
SFT
SFT
0
FIL2
FIL2
USB
USB
qw:pp
TX
TX
VFO
VFO
USB
USB
qr≥qpp≥pp
14.100.00
14.100.00
ANT
ANT
1
METER
METER
Po
Po
BW
BW
2.4k
2.4k
SFT
SFT
0
FIL2
FIL2
USB
USB
qw:pp
TX
TX
VFO
VFO
USB
USB
wq≥wrt≥pp
14.100.00
14.100.00
ANT
ANT
1
METER
METER
Po
Po
BW
BW
2.4k
2.4k
SFT
SFT
0
FIL2
FIL2
USB
USB
qw:pp
TX
TX
VFO
VFO
USB
USB
qr≥qwe≥pp
14.100.00
14.100.00
ANT
ANT
1
METER
METER
Po
Po
BW
BW
2.4k
2.4k
SFT
SFT
0
1FIL2
FIL2
USB
USB
qw:pp
TX
TX
VFO
VFO
USB
USB
qr≥qpp≥pp
14.100.00
14.100.00
1
12
12
1
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) does not appear and
memorized frequency (14.100 MHz) appears instead.
Changed frequency (14.123 MHz) appears.
■Direct frequency entry with the keypad
■Frequency setting with the tuning dial
•For ham band use
qPush the desired band key on the keypad 1–3
times.
•3 different frequencies can be selected on each band
with the band key. (See “Triple band stacking register”
below.)
wRotate the tuning dial to set the desired frequency.
eSelect the desired operating mode with the mode
switch. (p. 26)
•For general coverage receiver use
qPush [GENE] on the keypad 1–3 times.
•The [GENE] key calls up a frequency for general cov-
erage receiver use.
wRotate the tuning dial to set the desired frequency.
•For quick tuning, use the quick tuning step function. (p.
25)
eSelect the desired operating mode with the mode
switch. (p. 26)
24
4FREQUENCY SETTING
The transceiver has a keypad for direct frequency
entry as described below.
qPush [F-INP].
•“ ”appears.
wInput the desired frequency.
•Input “•” (decimal point) between the MHz units and
kHz units.
ePush [(F-INP)ENT] to enter the input frequency.
•To cancel the input, push [MAIN/SUB] instead of
[(F-INP)ENT].
[EXAMPLE]
F-inp
If the dial lock function is activated, the lock indicator lights, and the tuning dial does
not function. In this case, push [LOCK] to deactivate the lock function.
TRIPLE BAND STACKING REGISTER
The triple band stacking register provides 3 memories
in one band. 3 sets of a frequency and mode on each
band are automatically stored when used.
If a band key is pushed once, the frequency and
mode last used are called up. When the key is pushed
again, another stored frequency and mode are called
up.
This function is convenient when you operate 3
modes on one band. For example, one register is
used for a CW frequency, another for an SSB fre-
quency and the other one for an RTTY frequency.
[EXAMPLE]
21 m
21 m
14 b
14.025.00
CW
14.090.00
RTTY
14.195.00
USB
14 MHz band
Push 14 b
21.025.00
CW
21.090.00
RTTY
21.295.00
USB
21 MHz band
Push
F-INP
ENT
21.280 21.245
14.025 MHz
1 04 2•5
08 7•2 5
ENT7 0•6
F-INP ENT
2 4•5
F-INP ENT
18.0725 MHz
1F-INP
706 kHz
F-INP ENT
•15
5.100 MHz
F-INP ENT
7
7.000 MHz
■Advanced tuning functions
25
4
FREQUENCY SETTING
SELECTING THE 1 Hz STEP
The minimum tuning step of 1 Hz can be used for fine
tuning.
qTurn OFF the quick tuning step.
•“▼”does not appear.
wPush [TS] for 2 sec. to toggle the 1 Hz tuning step
ON and OFF.
•RIT and/or ∂TX also functions in 1 Hz tuning step
when used.
1/4 TUNING STEP FUNCTION (CW/RTTY only)
While operating in CW/RTTY, the 1/4 function is avail-
able for critical tuning. Dial rotation is reduced to 1/4
of normal when the 1/4 function is in use.
➥Push [1/4] to toggle the 1/4 function ON and OFF.
AUTO TUNING STEP FUNCTION (AM/FM only)
When selecting AM or FM, the quick tuning step is
automatically selected by the auto tuning step func-
tion.
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.
qPush [TS] momentarily to display the quick tuning
indicator.
wRotate the tuning dial to change the frequency in
programmed kHz steps.
ePush [TS] again to turn OFF the indicator.
rRotate the tuning dial for normal tuning if desired.
SELECTING THE kHz STEP
qPush [TS] momentarily to turn the quick tuning
step ON.
wPush [TS] for 2 sec. to enter the quick tuning step
setting display.
•Selected tuning steps for all modes appear.
eSelect the desired operating mode.
rRotate the tuning dial to select the desired tuning
step from 0.1, 1, 5, 9, 10, 12.5, 20 or 25 kHz.
tRepeat steps eand rto select quick tuning
steps for other modes, if desired.
yPush [EXIT] to exit the setting display.
■Mode selection
■Twin PBT operation
General PBT (Passband Tuning) function electronically
narrows the IF passband width by shifting the IF fre-
quency to slightly outside of the IF filter passband to
reject interference. This transceiver uses the DSP cir-
cuit for the PBT function. Moving both [TWIN PBT]
controls to the same position shifts the IF.
➥The LCD shows the passband width and shift fre-
quency graphically.
➥Push [FILTER] for 2 sec. to enter the filter set mode.
Current passband width and shift frequency is dis-
played in the filter set mode screen.
➥To set the [TWIN PBT] controls to the center posi-
tions, push [PBT CLR] for 2 sec.
The variable range depends on the passband width
and mode.The edge of the variable range is half of the
passband width, and PBT is adjustable in 25 or 50 Hz
steps. These controls function as an IF shift control
while in AM mode and when the RTTY filter is turned
ON. Only the inner control may function in this case. IF
shift is adjustable in 20/40 Hz steps in RTTY (RTTY fil-
ter is turned ON) or 150/300/500 Hz steps in AM.
•[TWIN PBT] should normally be set to the center posi-
tions (PBT setting is cleared) when there is no interfer-
ence.
•When PBT is used, the audio tone may be changed.
•Not available for FM mode.
•While rotating [TWIN PBT], noise may occur. This comes
from the DSP unit and does not indicate an equipment
malfunction.
5
26
RECEIVE AND TRANSMIT
The following modes are available in the IC-756PRO:
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.
Microphone signals are muted when data mode is
selected.
To select a mode of operation, push the desired mode
switch momentarily. Push the switch again to toggle
between USB and LSB, CW/CW-R and RTTY/RTTY-
R, AM and FM, if necessary. Push the switch for 2
sec. to toggle between normal and data mode, CW
and CW-R, RTTY and RTTY-R, if necessary.
See the diagram below for the order of selection.
PBT OPERATION EXAMPLE
SSB
CW/RTTY
AM/FM
USB USB-D
CW CW-R
AM AM-D
Push mode switch
for 2 sec. Push mode switch
momentarily.
LSB LSB-D
RTTY RTTY-R
FM FM-D
TWIN PBT TWIN PBT
TWIN PBT
IF center frequency Interference Desired signal
Passband
Both controls at
center position Cutting a lower
passband Cutting both higher and
lower passbands
Interference Interference
Desired signal
Passband
27
5
RECEIVE AND TRANSMIT
■Notch function
This transceiver has auto and manual notch func-
tions. The auto notch function automatically attenu-
ates more than 3 beat tones, tuning signals, etc.,
even if they are moving.The manual notch can be set
to attenuate a frequency via the [NOTCH] control.
➥Push [NOTCH] to toggle the notch function be-
tween auto, manual and OFF in SSB and AM
modes.
➥Push [NOTCH] to turn the manual notch function
ON and OFF in CW mode.
➥Push [NOTCH] to turn the auto notch function ON
and OFF in FM mode.
•Set to attenuate a frequency for manual notch via the
[NOTCH] control.
•“AN”appears when auto notch is in use.
•“MN”appears when manual notch is in use.
While operating the manual notch, noise may be
heard.This comes from the DSP unit and does not
indicate an equipment malfunction.
Unwanted tone
frequency
Desired
signal (AF) Desired
signal (AF)
Particular frequency
is attenuated
Auto notch OFF Auto notch ON
■Noise blanker
The noise blanker eliminates pulse-type noise such
as from car ignitions. The noise blanker is not avail-
able for FM mode.
➥Push the [NB] switch to turn the noise blanker ON
or OFF.
When using the noise blanker, received signals
may be distorted if they are excessively strong.
[NB] switch
■Noise reduction
The noise reduction function reduces noise compo-
nents and picks out desired signals which are buried
in noise.The received signals are converted to digital
signals and then the desired signals are separated
from the noise.
qPush the [NR] switch to turn the noise reduction
ON.
•[NR] indicator lights.
wRotate the [NR] control to adjust the noise reduc-
tion level.
ePush the [NR] switch to turn the noise reduction
OFF.
•[NR] indicator does not light.
Deep rotation of the [NR] control results in audio
signal masking or distortion. Set the [NR] control
for maximum readability.
BAL NR
Noise reduction OFF Noise reduction activated
Desired
signal (CW)
Noise components
BAL NR
The transceiver has 5 RTTY filters in addition to nor-
mal IF filters. The passband width can be selected
from 1 kHz, 500 Hz, 350 Hz, 300 Hz and 250 Hz.
When the RTTY filter is turned ON, the RTTY tuning
meter can be used. (p. 41)
Moreover, the twin peak filter changes the receive fre-
quency response by boosting 2 particular frequencies
(2125 and 2295 Hz) for better copying of desired
RTTY signals.
qPush [CW/RTTY] once or twice to select RTTY
mode.
wPush [RTTY FIL] to turn the RTTY filter ON.
•“TPF”appears when the twin peak filter is turned ON.
•RTTY filter selection
qPush [EXIT] one or more times to close a multi-
function screen, if necessary.
wSelect RTTY mode.
ePush [RTTY FIL] for 2 sec. to enter RTTY filter set
mode.
rPush [(F-1)Y] to select band width item.
tRotate the tuning dial to select the RTTY filter
width from 1 kHz, 500 Hz, 350 Hz, 300 Hz and 250
Hz.
•Push [(F-3)DEF] for 2 sec. to select a default value.
yPush [(F-2)Z] to select twin peak filter item.
•The received audio volume may become greater when
the twin peak filter is turned ON.
uRotate the tuning dial to turn the twin peak filter
function ON or OFF.
iPush [EXIT] to exit the RTTY filter set mode.
28
5RECEIVE AND TRANSMIT
■RTTY reverse mode
Received characters are occasionally garbled when
the receive signal is reversed between MARK and
SPACE.This reversal can be caused by incorrect TNC
connections, settings, commands, etc.
To receive a reversed RTTY signal correctly, select
RTTY-R (RTTY Reverse) mode.
qPush [CW/RTTY] once or twice to select RTTY
mode.
wPush [CW/RTTY] for 2 sec. to select RTTY or
RTTY-R mode.
•Check the receive signal.
■RTTY filter/Twin peak filter
■CW reverse mode
CW-R (CW Reverse) mode receives CW signals with
a reverse side CW carrier point like that of LSB and
USB modes.
Use when interfering signals are near a desired signal
and you want to change the interference tone.
qPush [CW/RTTY] once or twice to select CW
mode.
wPush [CW/RTTY] for 2 sec. to select CW or CW-R
mode.
•Check the interfering tone.
•Receive audio tone response
29
5
RECEIVE AND TRANSMIT
■CW pitch control
The received CW audio pitch and monitored CW
audio can be adjusted to suit your preferences (300
to 900 Hz) without changing the operating frequency.
The received CW audio pitch can be adjusted in 25
Hz steps.
The filter set mode screen graphically displays the
CW pitch operations. (See below.)
■IF filter selection
The transceiver has 3 passband width IF filters for
each mode.
For SSB and CW modes, the passband width can be
set within 50 to 3600 Hz in 50 or 100 Hz steps. A total
of 41 passband widths are available.
For RTTY mode, the passband width can be set
within 50 to 2700 Hz in 50 or 100 Hz steps. A total of
32 passband widths are available.
For AM and FM modes, the passband width is fixed
and 3 passband widths are available.
The filter selection is automatically memorized in
each mode.
The PBT shift frequencies are automatically mem-
orized in each filter.
•IF filter selection
qSelect the desired mode.
wFor RTTY mode, turn OFF the RTTY filter by push-
ing [RTTY FIL].
ePush [FILTER] one or more times to select the IF
filter 1, 2 or 3.
•The selected passband width and filter number is dis-
played in the LCD.
•Filter passband width setting
(SSB, CW and RTTY mode only)
qSelect SSB, CW or RTTY mode.
•Passband widths for AM and FM modes are fixed and
cannot be set.
wFor RTTY mode, turn OFF the RTTY filter by push-
ing [RTTY FIL].
ePush [FILTER] for 2 sec. to enter filter set mode.
rPush [FILTER] one or more times to select the de-
sired IF filter.
tWhile pushing [(F-1)BW], rotate the tuning dial to
set the desired passband width.
•In SSB and CW modes, the passband width can be set
within the following range.
50 to 500 Hz 50 Hz steps
600 to 2700 Hz 100 Hz steps
•In RTTY mode, the passband width can be set within
the following range.
50 to 500 Hz 50 Hz steps
600 to 2700 Hz 100 Hz steps
•Push [(F-3)DEF] to select the default value.
yRepeat steps rto tif desired.
uPush [EXIT] to exit the filter set mode screen.
The PBT shift frequencies are cleared when the
passband width is changed.
This filter set mode screen graphically displays the
PBT shift frequencies and CW pitch operations.
30
5RECEIVE 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 con-
stant; 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 se-
lected.
•AGC time constant selection
qSelect non-FM mode.
wPush [AGC] one or more times to select AGC fast,
AGC medium (MID) or AGC slow.
•Selectable AGC time constant (unit: sec.)
•Setting the AGC time constant
qSelect the desired mode except FM mode.
wPush [AGC] for 2 sec. to enter AGC set mode.
ePush [AGC] one or more times to select FAST time
constant.
rRotate the tuning dial to set the desired time con-
stant for ‘AGC FAST.’
•AGC time constant can be set between 0.1 to 8.0 sec.
(depends on mode) or turned OFF.
•Push [(F-3)DEF] to select a default value.
tPush [AGC] to select medium time constant.
yRotate the tuning dial to set the desired time con-
stant for ‘AGC MID.’
•AGC time constant can be set between 0.1 to 8.0 sec.
(depends on mode) or turned OFF.
•Push [(F-3)DEF] to select a default value.
uPush [AGC] to select slow time constant.
iRotate the tuning dial to set the desired time con-
stant for ‘AGC SLOW.’
•AGC time constant can be set between 0.1 to 8.0 sec.
(depends on mode) or turned OFF.
•Push [(F-3)DEF] to select a default value.
oSelect another mode except FM. Repeat steps e
to oif desired.
!0 Push [EXIT] to exit the AGC set mode screen.
31
5
RECEIVE AND TRANSMIT
■Dualwatch operation
Dualwatch monitors 2 frequencies with the same
mode simultaneously.
During dualwatch, both frequencies should be on the
same band, because the bandpass filter in the RF cir-
cuit is selected for the main readout frequency.
qSet a desired frequency.
wPush [DUALWATCH] for 2 sec.
•Equalized receive frequency and “”appear in
the LCD. This quick dualwatch function can be turned
OFF in set mode. (p. 68)
•Pushing [DUALWATCH] momentarily activates the du-
alwatch with the previously operated frequency.
eSet another desired frequency using the tuning
dial.
rAdjust [BAL] to set a suitable signal strength bal-
ance between the main and sub readout frequen-
cies.
•S-meter shows the combined signal strength.
tTo transmit on the sub readout frequency, push
[CHANGE] or [SPLIT].
RIT function can be used for the main readout only.
∂TX function can be used for the transmit readout
(main readout when the split function is OFF; sub
readout when the split function is ON).
DUAL-WDUAL-W
•Scanning during dualwatch
Scanning operates only for the main readout. To op-
erate the scan during dualwatch, scan on the main
readout and use the sub readout for your QSO using
both dualwatch and split frequency operation.
qProgram the desired programmed scan edges in
the same amateur band. See p. 52 for program-
ming.
•If you plan to operate a ∂F scan, programming the
scan edges may not be necessary.
wPush [SPLIT] to turn the split frequency function
ON.
•“ ”appears.
eSelect VFO mode for the main readout.
rSet the desired operating frequency for the main
readout.
tPush [DUALWATCH] for 2 sec.
•The main and sub readout frequencies are equalized
and the dualwatch function is turned ON.
yPush [(F-4)SCAN] to select the scan screen.
•Push [EXIT] one or more times to close a multi-function
screen, if necessary.
uPush [(F-1)PROG] or [(F-2)∂F] to start the pro-
grammed scan or ∂F scan, respectively.
•Scan activates on the main readout between the pro-
grammed scan edges or within the ∂F span.
•Transmitting on the sub readout stops the scan.
iTo cancel the scan, push [EXIT].
SPLITSPLIT
32
5RECEIVE AND TRANSMIT
■Split frequency operation
Split frequency operation allows you to transmit and
receive in the same mode on two different frequen-
cies. The split frequency operation is basically per-
formed using 2 frequencies on the main and sub
readouts.
Following is an example of setting 21.290 MHz for re-
ceiving and 21.310 MHz for transmitting.
qSet 21.290 MHz (USB) in VFO mode.
wPush [SPLIT] momentarily, then push [CHANGE]
for 2 sec.
•The quick split function is much more convenient for se-
lecting the transmit frequency. See the next section for
details.
•The equalized transmit frequency and “”appear
on the LCD.
•“TX”appears to show the transmit frequency’s readout.
eRotate the tuning dial while pushing [XFC] to set
the transmit frequency to 21.310 MHz.
•The transmit frequency can be monitored while push-
ing [XFC] or using dualwatch.
rNow you can receive on 21.290 MHz and transmit on
21.310 MHz.
To change the transmit and receive frequencies, push
[CHANGE] to exchange the main and sub readouts.
DIRECT SHIFT FREQUENCY INPUT
The shift frequency can be entered directly.
qPush [F-INP].
wEnter the desired shift frequency with the digit
keys.
•1 kHz to 1 MHz can be set.
•When you require a minus shift direction, push [•] in
advance.
ePush [SPLIT].
•The shift frequency is input in the sub readout and the
split function is turned ON.
[EXAMPLE]
DUALWATCH FUNCTION
The dualwatch function is convenient for tuning the
transmit frequency while monitoring both frequencies
used for transmitting and receiving.
SPLIT LOCK FUNCTION
Accidentally releasing the [XFC] switch while rotating
the tuning dial changes the receive frequency.To pre-
vent this, use both the split lock and dial lock functions
to change the transmit frequency only. The split lock
function cancels the dial lock function while pushing
[XFC] during split frequency operation.
The dial lock’s effectiveness during split frequency op-
eration can be selected in the set mode for both re-
ceive and transmit frequencies; or only the receive
frequency. (p. 69)
CONVENIENT
CONVENIENT
CONVENIENT
SPLITSPLIT
33
5
RECEIVE AND TRANSMIT
■Quick split function
When you find a DX station, an important considera-
tion is how to set the split frequency.
When you push the [SPLIT] switch for 2 sec., split fre-
quency operation is turned ON, the sub readout is
equalized to the main readout frequency and enters
standby for transmit frequency input.
This shortens the time needed to start split frequency
operation.
The quick split function is ON by default. For your con-
venience, it can be turned OFF in set mode. (p. 68) In
this case, the [SPLIT] switch does not equalize the
main and sub readout frequencies.
qSuppose you are operating at 21.290 MHz (USB)
in VFO mode.
wPush [SPLIT] for 2 sec.
•Split frequency operation is turned ON.
•The sub readout is equalized to the main readout fre-
quency.
•The sub readout enters standby for transmit frequency
input.
eRotate the tuning dial to set the transmit frequency;
or, input the transmit frequency using the keypad
and [ENT]; or, input a shift frequency using the
keypad and [SPLIT].
•The transmit frequency can be monitored while push-
ing [XFC] or using dualwatch.
When you are searching for DX stations and you
suspect that a DX station may say “up ‘X’kHz”for
their receive frequency:
OPERATION 1
qPush [SPLIT] for 2 sec. to standby for split opera-
tion.
wIf the DX station says “up 10 kHz”:
•Push [1], [0] then [SPLIT].
•Or, rotate the tuning dial.
OPERATION 2
If the DX station says “down 5 kHz”before you enter
standby for split operation:
➥Push [F-INP], [•], [5] then [SPLIT].
•The split function is turned ON and “5 kHz down”fre-
quency is entered in the sub readout.
PRACTICAL EXAMPLE
When you receive a pile-up and you want to start
split frequency operation to simplify picking out sta-
tions:
qPush [SPLIT] momentarily and push [CHANGE]
for 2 sec.
•The sub readout frequency is equalized to the main
readout frequency and “”appears.
wRotate the tuning dial to set your receive fre-
quency in the main readout.
eAnnounce your receive frequency.
rAfter you catch one of the calling stations’call
signs, push and hold the PTT switch to respond.
•While pushing [XFC], you can monitor your transmit
frequency.
SPLITSPLIT
PRACTICAL EXAMPLE
34
5RECEIVE AND TRANSMIT
■RIT and ∂∂TX
•RIT function
The RIT function shifts the receive frequency up to
±9.999 kHz in 1 Hz steps (10 Hz steps when can-
celling the 1 Hz step readout) without moving the
transmit frequency.
•See #0 on p. 6 for function description.
qPush the [RIT] switch.
wRotate the [RIT/∂TX] control.
eTo reset the RIT frequency, push [CLEAR] for 2
sec.
rTo cancel the RIT function, push [RIT] again.
•“ ”disappears.
•∂∂TX function
The ∂TX function shifts the transmit frequency up to
±9.999 kHz in 1 Hz steps (10 Hz steps when can-
celling the 1 Hz step readout) without moving the re-
ceive frequency.
•See #1 on p. 6 for function description.
qPush the [∂TX] switch.
wRotate the [RIT/∂TX] control.
eTo reset the ∂TX frequency, push [CLEAR] for 2
sec.
rTo cancel the ∂TX function, push [∂TX] again.
•“ ”disappears.
∂TXTX
RITRIT
When RIT and ∂TX are ON at the same time, the [RIT/∂TX] control shifts both the
transmit and receive frequencies from the displayed frequency at the same time.
•Calculate function
The shift frequency of the RIT or ∂TX function can
be added/subtracted to the displayed frequency.
While displaying the RIT and/or ∂TX shift frequency,
push [RIT] or [∂TX] for 2 sec.
•Practical example
When you find a DX station on 21.025 MHz/CW and
the station is picking up stations transmitting slightly
up from 21.025 MHz.
qPush [RIT] and [∂TX] to turn both the RIT and
∂TX functions ON.
wRotate [RIT/∂TX] to find the DX station’s receive
frequency.
eWhen you find the DX station’s receive frequency,
push [RIT] to turn the RIT function OFF.
•Now you can transmit the DX station’s receive fre-
quency and receive the DX station’s transmit fre-
quency (21.025 MHz).
rStart transmitting while the station is standing by.
ANT
ANT
1
METER
METER
Po
Po
BW
BW
2.4k
2.4k
SFT
SFT
0
FIL2
FIL2
USB
USB
qw:pp
TX
TX
USB
USB
qr≥qot≥pp
14.100.00
14.100.00
-p≥wt
RIT
RIT
P.AMP
P.AMP
1
ANT
ANT
1
METER
METER
Po
Po
BW
BW
2.4k
2.4k
SFT
SFT
0
FIL2
FIL2
USB
USB
qw:pp
TX
TX
USB
USB
qr≥qot≥wt
14.100.00
14.100.00
-p≥pp
RIT
RIT
P.AMP
P.AMP
1
1
VFO
VFO
1
VFO
VFO
Push and hold RIT
35
5
RECEIVE AND TRANSMIT
■Monitor function
The monitor function allows you to monitor your trans-
mit IF signals in any mode through the speaker. Use
this to check voice characteristics while adjusting
SSB transmit tones. (p. 65) The CW sidetone func-
tions regardless of the [MONITOR] switch setting.
qPush [MONITOR].
•The indicator lights when the monitor function is ON.
wPush [EXIT] one or more times to close a multi-
function screen, if necessary.
ePush [(F-5)SET] then [(F-1)LEVEL] to enter level
set mode.
rPush [(F-1)Y] or [(F-2)Z] to select the monitor
level item.
tAdjust monitor gain using the tuning dial.
•Pushing [(F-3)DEF] sets the selected item to the default
value of the item.
yPush [EXIT] twice to exit level set mode.
•Use headphones to prevent feedback.
•Set the transmit tone settings to the 0 dB posi-
tions to check the unaltered characteristics of
transmitter or microphone.
■VOX function
The VOX (Voice-Operated Transmission) function tog-
gles between transmit and receive with your voice.
This function provides an opportunity to input log en-
tries into your computer, etc., while operating.
•Using the VOX function
qSelect a phone mode (SSB, AM, FM).
wPush [VOX] to turn the VOX function ON or OFF.
•Adjusting the VOX function
qSelect a phone mode (SSB, AM, FM).
wPush [VOX] to turn VOX function ON.
ePush [VOX] for 2 sec. to enter VOX set mode.
rSelect the VOX gain item using [F-1] or [F-2].
tWhile speaking into the microphone, rotate the
tuning dial to the point where the transceiver is
continuously transmitting.
yAdjust the VOX delay for a convenient interval be-
fore returning to receive.
-Select the VOX delay item using [F-1] or [F-2].
-Rotate the tuning dial.
uIf the receive audio from the speaker toggles to
transmit, adjust the anti VOX to the point where it
has no effect.
36
5RECEIVE AND TRANSMIT
■Meter function
The transceiver has 4 transmit meter functions for
your convenience. Select the desired meter with the
[METER] switch.
•Analog transmit meter
➥Push [METER] to select RF power (Po), SWR, ALC
or compression level (COMP) for transmit metering.
In addition, the transceiver can display the multi-func-
tion digital meter in the LCD display, which displays
all transmit meters simultaneously.
•Multi-function digital meter
qPush [METER] for 2 sec. to turn the multi-function
digital meter ON or OFF.
wPush [(F-1)P-HOLD] to toggle the peak level hold
function ON or OFF.
•“P-HOLD”appears on the window title when the peak
level hold function is turned ON.
■SWR reading
The SWR meter indicates the SWR over the trans-
mission line in all modes.
qPush [TUNER] to turn the antenna tuner OFF.
wPush [METER] one or more times to select the Po
meter.
ePush [CW/RTTY] once or twice to select RTTY
mode.
rPush [TRANSMIT].
tRotate [RF POWER] clockwise past the 12 o’clock
position for more than 30 W output power (30%).
yPush [METER] once to select the SWR meter as
the transmit meter.
uRead the SWR on the SWR meter.
The built-in antenna tuner matches the transmitter
to the antenna when the SWR is lower than 3:1.
37
5
RECEIVE AND TRANSMIT
■Speech compressor
The RF speech compressor increases average RF
output power, improving signal strength and readabil-
ity in SSB.
•Speech compressor
qSelect USB or LSB mode.
wPush [COMP] momentarily to turn the speech
compressor ON and OFF.
ePush [COMP] for 2 sec. to toggle between narrow,
middle or wide transmit filter.
•Transmit filter width:
NAR 2.0 kHz
MID 2.6 kHz
WIDE 2.9 kHz
•Compression level setting
qSelect USB or LSB mode.
wPreset the transceiver as follows:
[COMP] function : OFF
[METER] function : ALC
[MIC GAIN] control : Center position
[COMP] control : Center position
[RF POWER] control : Max. counterclockwise
eTransmit at your normal voice level.
rAdjust the [MIC GAIN] control so that the ALC
meter reads within the ALC zone, whether or not
you speak softly or loudly.
tPush [COMP] momentarily to turn the speech
compressor ON.
yPush [METER] once to select the COMP meter.
uAdjust the [COMP] control so that the COMP
meter reads within 10 dB and 20 dB.
When the ALC meter peaks above the ALC zone,
your transmitted voice may be distorted.
38
5RECEIVE AND TRANSMIT
■Digital voice recorder
The transceiver has a total of 8 memory channels, 4
each for transmit and receive, of digital voice memo-
ries. A maximum message of 15 sec. can be recorded
in each transmit and receive 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.
•Recording a received audio
qPush [EXIT] one or more times to close a multi-
function screen, if necessary.
wSelect a phone mode by pushing [SSB] or
[AM/FM].
ePush [(F-2)VOICE] to call up the voice recorder
screen.
rPush [(F-1)PLAY] to select the voice memory
screen.
•If the transmit voice memory channel (T1–T4) appears,
push [(F-5)T/R] to select receive voice memory chan-
nel.
tPush the desired memory channel, [(F-1)R1]–
[(F-4)R4], for 2 sec. to start recording.
•The operating frequency, mode and current time are
programmed automatically.
•Previously recorded contents are cleared.
yPush the selected memory channel, [(F-1)R1] –
[(F-4)R4], again to stop recording.
•Recording is automatically terminated after 15 sec.
uPush [EXIT] twice to exit voice memory screen.
•Playing the recorded audio
qPush [EXIT] one or more times to close a multi-
function screen, if necessary.
wSelect a phone mode by pushing [SSB] or
[AM/FM].
ePush [(F-2)VOICE] to call up the voice recorder
screen.
rPush [(F-1)PLAY] to select the voice memory
screen.
•If the transmit voice memory channel (T1–T4) appears,
push [(F-5)T/R] to select receive voice memory chan-
nel.
tPush the desired memory channel, [(F-1)R1]–
[(F-4)R4], momentarily to playback.
yPush the selected memory channel, [(F-1)R1] –
[(F-4)R4], again to stop playback if desired.
uPush [EXIT] twice to exit voice memory screen.
39
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.
qPush [EXIT] one or more times to close a multi-
function screen, if necessary.
wSelect a phone mode by pushing [SSB] or
[AM/FM].
ePush [(F-2)VOICE] to call up the voice recorder
screen.
rPush [(F-2)MIC REC] to select the voice memory
recording screen.
tPush the desired memory channel, [(F-1)T1]–
[(F-4)T4], for 2 sec. to start recording.
•Speak into the microphone without pushing the [PTT]
switch.
•Previously recorded contents are cleared.
yAdjust the [MIC GAIN] control so that the [MIC-
REC LEVEL] indicator reads within 100%.
uPush the selected memory channel, [(F-1)T1]–
[(F-4)T4], again to stop recording.
•Recording is automatically terminated after 15 sec.
iPush [EXIT] twice to exit voice memory screen.
•Confirming a message for transmit
qPush [EXIT] one or more times to close a multi-
function screen, if necessary.
wSelect a phone mode by pushing [SSB] or
[AM/FM].
ePush [(F-2)VOICE] to call up the voice recorder
screen.
rPush [(F-2)MIC REC] to select the voice memory
recording screen.
tPush the desired memory channel, [(F-1)T1]–
[(F-4)T4], momentarily to start playback and con-
firmation.
yPush the selected memory channel, [(F-1)T1]–
[(F-4)T4], again to stop playback if desired.
uPush [EXIT] twice to exit voice memory screen.
•Programming a memory name for
transmit
Memory channels can be tagged with alphanumeric
names of up to 20 characters each.
Capital letters, small letters, numerals, some symbols
(! # $ % & ¥ ? " ' ` ^ + – ✱/ .,: ; = < > ( ) [ ] { } | _ _)
and spaces can be used.
qRecord a message as described above.
wCall up the voice memory recording screen as de-
scribed in step qto rabove.
ePush [(F-5)NAME] to enter memory name edit
condition.
•A cursor appears and blinks.
rPush [(F-5)T1..T4] one or more times to select the
desired voice memory.
tInput the desired character by rotating the tuning
dial or by pushing the band key for number input.
•Push [ABC] or [abc] to toggle capital and small letters.
•Push [123] or [etc] to toggle numerals and symbols.
•Push [(F-1)Ω] or [(F-2)≈] for cursor movement.
•Push [(F-3)DEL] to delete the selected character.
•Push [(F-4)SPACE] to input a space.
yPush [EXIT] to input and set the name.
•The cursor disappears.
uRepeat steps rto yto program another voice
memory’s name, if desired.
iPush [EXIT] twice to exit voice memory screen.
40
5RECEIVE AND TRANSMIT
■Digital voice recorder (continued)
•Sending a message for transmit
qPush [EXIT] one or more times to close a multi-
function screen, if necessary.
wSelect a phone mode by pushing [SSB] or
[AM/FM].
ePush [(F-2)VOICE] to call up the voice recorder
screen.
rPush [(F-1)PLAY] to select the voice memory
screen.
•If the receive voice memory channel (R1–R4) appears,
push [(F-5)T/R] to select transmit voice memory chan-
nel.
tPush the desired memory channel, [(F-1)T1]–
[(F-4)T4], momentarily to transmit the contents.
yPush the selected memory channel, [(F-1)T1]–
[(F-4)T4], again to stop, if desired.
uPush [EXIT] twice to exit voice memory screen.
•Transmit monitor function
The monitor function can be automatically turned ON
while transmitting a voice memory message.
qCall up the voice recorder screen as described
above.
wPush [(F-5)SET] to select the voice memory set
mode screen.
eRotate the tuning dial to turn the monitor function
ON and OFF.
•Push [(F-3)DEF] to select the default condition.
rPush [EXIT] to return to the voice recorder screen.
•Transmit level setting
qCall up the voice recorder screen as described at
left.
wPush [(F-3)TX LEV.] to select the voice memory
transmit level set mode screen.
ePush the desired memory channel, [(F-1)T1]–
[(F-4)T4], momentarily to transmit the contents.
rRotate the tuning dial to adjust the transmit voice
level.
•Push [(F-5)DEF] to select the default condition.
tPush [EXIT] to return to the voice recorder screen.
41
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 con-
troller (TNC) is not necessary for receiving a Baudot
signal.
qPush [EXIT] one or more times to close a multi-
function screen, if necessary.
wPush [CW/RTTY] once or twice to select RTTY
mode.
ePush [(F-2)DECODE] to turn the RTTY decoder
ON.
•RTTY decoder screen appears.
rIf the RTTY filter is turned OFF, push [RTTY FIL]
to turn the function ON.
•The RTTY decoder does not function when the RTTY
filter is turned OFF.
tPush [(F-1)HOLD] to freeze the current screen.
•“HOLD”appears while the function is in use.
yPush [(F-5)WIDE] to toggle the normal or wide
screen space.
uPush [(F-2)CLR] for 2 sec. to clear the displayed
characters.
iPush [EXIT] to exit the RTTY decoder screen.
•Setting the decoder threshold level
Adjust the RTTY decoder threshold level if some
characters are displayed when no signal is received.
qCall up the RTTY decoder screen as described at
left.
wPush [(F-4)ADJ] to select the threshold level set-
ting condition.
eRotate the tuning dial to adjust the RTTY decoder
threshold level.
•Push [(F-3)DEF] to select the default condition.
rPush [EXIT] to return to the RTTY decoder screen.
The UnShift On Space (USOS) function and new
line code can be set in the miscellaneous (others)
set mode. (pgs. 70, 71)
■RTTY tuning meter
The transceiver has an RTTY tuning indicator to be
tuned correctly and easily.
The RTTY tuning meter is automatically displayed
when the RTTY filter is turned ON.
qPush [CW/RTTY] once or twice to select RTTY
mode.
wPush [RTTY FIL] to activate the RTTY filter and
RTTY tuning meter.
42
5RECEIVE AND TRANSMIT
■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.
•Setting the electronic keyer
qPush [CW/RTTY] once or twice to select CW
mode.
wPush [KEYER] to select keyer set mode.
ePush [(F-4)CW KEY] to select memory keyer set
mode.
rSelect the “Keyer Repeat Time”item using [F-1].
tRotate the tuning dial to select the memory keyer
repeat interval. See the next page for details.
•1, 2, 3, 10 or 30 sec. can be set.
•Push [(F-3)DEF] to select a default interval of 2 sec.
yPush [F-2] to select the “Dot/Dash Ratio”item.
uRotate the tuning dial to select the keying weight.
•1:1:2.8 to 1:1:4.5 can be set.
•Check the ratio with side tone in CW mode.
•Push [(F-3)DEF] to select a default ratio of 1:1:3.0.
iPush [F-2] to select the “Rise Time”item.
oRotate the tuning dial to select the time which the
output power becomes the set transmit power.
!0 Push [F-2] to select the “Paddle Polarity”item.
!1 Rotate the tuning dial to select the paddle polarity
between normal and reverse polarity.
!2 Push [F-2] to select the “Keyer Type”item.
!3 Rotate the tuning dial to set the electronic keyer
function to electronic keyer, bug-key or straight key
(electronic keyer OFF).
•Bug-key setting can be substituted for a bug-key while
operating with a paddle. Set to “Straight”for a real bug-
key, or connect the bug-key to [KEY] on the rear panel.
!4 Push [F-2] to select the “Mic Up/Down Keyer”item.
!5 Rotate the tuning dial to turn the substitute paddle
function ON or OFF.
•The up/down keys of the microphone can be substi-
tuted for a paddle. When ON is selected, they do not
function as up/down keys in all modes.
!6 Push [EXIT] to exit keyer set mode.
43
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 54
characters in each memory channel.
•Programming the memory keyer
qPush [CW/RTTY] to select CW mode.
wPush [(F-2)KEYER] to select keyer set mode.
ePush [(F-2)EDIT] to enter the memory keyer edit
screen.
rPush [M1..M4] one or more times to select the de-
sired keyer memory channel.
tSelect the desired character group by pushing the
character group keys ([ABC], [123], [etc]) one or
more times.
ySelect the desired character by rotating the tuning
dial or by pushing the band key for number input.
•Push [(F-1)Ω] or [(F-2)≈] for cursor movement.
•Push [(F-3)DEL] to delete the selected character.
•Push [(F-4)SPACE] to input a space.
•“*”is for contact numbers and can be input for the
count up trigger channel (“”appears).
uRepeat step yuntil the desired contents are input.
iPush [M1..M4] to select the next memory channel
and repeat step yfor character input, if desired.
oPush [EXIT] to exit the memory keyer edit screen.
•Transmitting memory keyer contents
qPush [CW/RTTY] to select CW mode.
wPush [KEYER] to select keyer set mode.
ePush [(F-1)SEND] to enter the memory keyer
screen.
rPush [(F-1)M1] – [(F-4)M4] momentarily to trans-
mit the contents one time; push these keys for 2
sec. to transmit the contents repeatedly.
•“M1”–“M4”are highlighted while transmitting.
•“ ”appears while transmitting repeatedly.
•Set the repeat interval of the memory keyer to 1, 2, 3,
10 or 30 sec. See the previous page for keyer set
mode.
•To count down the contact number, push [(F-5)–1].
tPush [EXIT] to exit memory keyer screen.
•Setting the contact (serial) number
Contact number can be automatically transmitted
from one of the memory keyer channels. The Morse
cut numbers can be used as the contact numbers.
The maximum number for contact numbers is 9999.
qPush [CW/RTTY] to select CW mode.
wPush [KEYER] to select keyer set mode.
ePush [(F-3)001] to enter contact number screen.
rRotate the tuning dial to select the cut number
type, if desired.
•“Normal”does not use Morse cut numbers.
•“190 →ANO”sets 1 as A, 9 as N and Ø as O.
•“190 →ANT”sets 1 as A, 9 as N and Ø as T.
•“90 →NO”sets 9 as N and Ø as O.
•“90 →NT”sets 9 as N and Ø as T.
tPush [F-2] to select the “Count Up Trigger”item.
yRotate the tuning dial to select the desired mem-
ory channel for contest numbers.
uPush [F-2] to select the “Present Number”item.
iPush [(F-3)001CLR] for 2 sec. to clear the contact
number.
oPush [EXIT] to exit keyer set mode.
44
5RECEIVE AND TRANSMIT
■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.
qPush [EXIT] one or more times to close a multi-
function screen, if necessary.
wPush [(F-1)SCOPE] to select the scope screen.
ePush [(F-1)SPAN] one or more times to select the
scope span.
rPush [(F-2)ATT] one or more times to activate an
attenuator or turn the attenuator OFF.
•10, 20 and 30 dB attenuators are available.
tPush [(F-3)MARKER] one or more times to select
the marker (sub readout or transmit frequency) or
turn the marker OFF.
•“TX MARKER”displays the marker at the transmit fre-
quency.
•“SUB MARKER”displays the marker at the sub read-
out frequency.
yPush [(F-4)HOLD] to freeze the current spectrum
waveform.
•“HOLD”appears while the function is in use.
uPush [EXIT] to exit the scope screen.
•Spectrum scope during transmitting
The spectrum scope shows the transmit signal wave-
form while transmitting. This can be deactivated if de-
sired.
When “OFF”is selected, the spectrum scope holds
the received waveform while transmitting and does
not show the transmit waveform.
qCall up the scope screen as described at left.
wPush [(F-5)SET] to select the spectrum scope set
mode.
ePush [F-1] to select the “Scope during Tx”item.
rRotate the tuning dial to display the spectrum
scope while transmitting or not.
tPush [EXIT] to exit keyer set mode.
•Maximum level hold function
The spectrum scope shows the peak level holding
function. Peak levels are displayed in the background
of the current spectrum in a different color until the re-
ceive frequency changes. This can be deactivated if
desired.
qCall up the scope screen as described at left.
wPush [(F-5)SET] to select the spectrum scope set
mode.
ePush [F-2] to select the “Max Hold”item.
rRotate the tuning dial to turn the peak level holding
function ON or OFF.
tPush [EXIT] to exit keyer set mode.
If a strong signal is received, ghost waveform may
appear. Push [(F-2)ATT] one or more times to acti-
vate the spectrum scope attenuator in this case.
45
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 mem-
orize a selected antenna (ANT1, ANT2, ANT1/RX an-
tenna and ANT2/RX antenna). When you change the
operating frequency beyond a band, the previously
used antenna is automatically selected for the new
band. This function is convenient when you use 2 or 3
antennas.
To use the band memory, enter set mode and confirm
that “Auto”is selected as the [ANT] switch item. (p. 70)
•When OFF is selected, the [ANT] switch does not function
and [ANT1] is always selected.
•When “Manual”is selected, the [ANT] switch functions,
however, band memory does not function. In this case, you
must select an antenna manually.
•When “Auto”is selected (default setting), the antenna tuner
ON/OFF condition is also memorized in the band memory.
•When “Auto”or “Manual”is selected, the antenna tuner
ON/OFF condition is consistent with the [ANT] switch.
•Antenna switch selection example
Under the following condition, “Auto”should be se-
lected as the [ANT] switch set mode item.
- When you use 2 antennas.
Under the following conditions, “Manual”should be
selected as the [ANT] switch set mode item.
- When using 1 antenna.
- When using the EX-627 HF AUTOMATIC ANTENNA
SELECTOR for more than 3 antennas (except for re-
ceive antenna).
- When using an external antenna tuner.
■Dial lock function
The dial lock function prevents changes by accidental
movement of the tuning dial. The lock function elec-
tronically locks the dial.
➥Push [LOCK] to toggle the dial lock function ON
and OFF.
•The [LOCK] indicator lights when the dial lock function
is in use.
46
5RECEIVE AND TRANSMIT
■Repeater operation
A repeater amplifies received signals and retransmits
them at a different frequency. When using a repeater,
the transmit frequency is shifted from the receive fre-
quency by an offset frequency. A repeater can be ac-
cessed using split frequency operation with the shift
frequency set to the repeater’s offset frequency.
For accessing a repeater which requires a repeater
tone, set the repeater tone frequency in set mode
as described below.
qSet the offset frequencies (HF, 50 MHz) and turn
ON the quick split function in set mode (others) in
advance. (pgs. 68, 69)
wPush [VFO/MEMO] to select VFO mode.
ePush the desired band key.
rPush [AM/FM] one or more times to select FM
mode.
tSet the receive frequency (repeater output fre-
quency).
yPush [SPLIT] for 2 sec. to start repeater operation.
•Repeater tone is turned ON automatically.
•Shifted transmit frequency and “TX”appear in the sub
readout.
•The transmit frequency can be monitored while push-
ing [XFC] or using dualwatch.
uPush and hold [PTT] to transmit; release [PTT] to
receive.
iTo return to simplex, push [SPLIT] momentarily to
clear the sub display.
•Setting the repeater tone
Some repeaters require subaudible tones to be ac-
cessed. Subaudible tones are superimposed over
your normal signal and must be set in advance. The
transceiver has 50 tones from 67.0 Hz to 254.1 Hz.
Each memory channel can store an independent set-
ting.
qSelect FM mode.
wPush [TONE] for 2 sec. to enter tone set mode.
ePush [F-1] to select the repeater tone item.
rRotate the tuning dial to select the desired re-
peater tone frequency.
tPush [EXIT] to exit tone set mode.
Available repeater tones (Unit: Hz)
Store repeater tone frequencies and ON/OFF settings
in memory channels for easy recall.
CONVENIENT
67.0
69.3
71.9
74.4
77.0
79.7
82.5
085.4
088.5
091.5
094.8
097.4
100.0
103.5
107.2
110.9
114.8
118.8
123.0
127.3
131.8
136.5
141.3
146.2
151.4
156.7
159.8
162.2
165.5
167.9
171.3
173.8
177.3
179.9
183.5
186.2
189.9
192.8
196.6
199.5
203.5
206.5
210.7
218.1
225.7
229.1
233.6
241.8
250.3
254.1
47
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.
qPush [VFO/MEMO] to select VFO mode.
wPush the desired band key.
ePush [AM/FM] one or more times to select FM
mode.
rPush [TONE] one or more times until “TSQL”ap-
pears in the function display.
tWhen the received signal includes a matching
tone, squelch opens and the signal can be heard.
•When the received signal’s tone does not match, tone
squelch does not open, however, the S-indicator shows
signal strength.
•To open the squelch manually, push [XFC].
yOperate the transceiver in the normal way.
uTo cancel the tone squelch, push [TONE] to clear
“TSQL.”
•Setting the tone squelch tone
The transceiver has 50 tones from 67.0 Hz to 254.1
Hz.
qSelect FM mode.
wPush [TONE] for 2 sec. to enter tone set mode.
ePush [F-2] to select the tone squelch tone item.
rRotate the tuning dial to select the desired tone
squelch frequency.
tPush [EXIT] to exit tone set mode.
Available tone squelch tones (Unit: Hz)
Store tone squelch frequencies and ON/OFF settings
in memory channels for easy recall.
CONVENIENT
67.0
69.3
71.9
74.4
77.0
79.7
82.5
085.4
088.5
091.5
094.8
097.4
100.0
103.5
107.2
110.9
114.8
118.8
123.0
127.3
131.8
136.5
141.3
146.2
151.4
156.7
159.8
162.2
165.5
167.9
171.3
173.8
177.3
179.9
183.5
186.2
189.9
192.8
196.6
199.5
203.5
206.5
210.7
218.1
225.7
229.1
233.6
241.8
250.3
254.1
■Antenna tuner operation
The internal automatic antenna tuner matches the
transceiver to the connected antenna automatically.
Once the tuner matches an antenna, the variable ca-
pacitor angles are memorized as a preset point for
each frequency range (100 kHz steps). Therefore,
when you change the frequency range, the variable ca-
pacitors are automatically preset to the memorized
point.
CAUTION: NEVER transmit with the tuner ON
when no antenna is connected.This will damage the
transceiver. Be careful of the antenna selection.
48
5RECEIVE AND TRANSMIT
TUNER OPERATION
➥Push the [TUNER] switch to turn the internal an-
tenna tuner ON. The antenna is tuned automatically
when the antenna SWR is higher than 1.5:1.
•When the tuner is ON, the [TUNER] switch lights.
MANUAL TUNING
During SSB operation at low voice levels, the internal
tuner may not be tuned correctly. In such cases, man-
ual tuning is helpful.
➥Push [TUNER] for 2 sec., to start manual tuning.
•A side tone is emitted and [TUNER] blinks while tuning.
•If the tuner cannot reduce the SWR to less than 1.5:1
after 20 sec. of tuning, the [TUNER] switch indicator
goes out.
AUTOMATIC TUNER START (HF bands only)
If you want to deactivate the tuner under conditions of
VSWR 1.5:1 or less, use the auto tuner start function
and turn the tuner OFF. This function activates the
tuner automatically when the SWR exceeds 1.5:1.
This function is turned ON in set mode. (p. 69).
PTT TUNER START
The tuner is always tuned when the PTT is pushed
after the frequency is changed (more than 1% from
last-tuned frequency). This function removes the
“push and hold [TUNER]”operation and activates for
the first transmission on a new frequency.
This function is turned ON in set mode. (p. 69).
NOTES:
•If the tuner cannot tune the antenna
Check the following and try again:
•the [ANT] connector selection.
•the antenna connection and feedline.
•the unaltered antenna SWR. (Less than 3:1 for HF bands;
Less than 2.5:1 for 50 MHz band)
•the transmit power. (8 W for HF bands; 15 W for 50 MHz
band)
•the power source voltage/capacity.
If the tuner cannot reduce the SWR to less than 1.5:1
after checking the above, perform the following:
•repeat manual tuning several times.
•tune with a 50 Ωdummy load and re-tune the antenna.
•turn power OFF and ON.
•adjust the antenna cable length.
(This is effective for higher frequencies in some cases.)
•Tuning a narrow bandwidth antenna
Some antennas, especially for low bands, have a nar-
row bandwidth. These antennas may not be tuned at
the edge of their bandwidth, therefore, tune such an
antenna as follows:
Suppose you have an antenna which has an SWR of
1.5:1 at 3.55 MHz and an SWR of 3:1 at 3.8 MHz.
qPush [TUNER] to turn the antenna tuner ON.
wSelect CW mode.
eTurn OFF the break-in function. (p. 5)
rPush [TRANSMIT] to set to the transmit condition.
tSet 3.55 MHz and key down.
ySet 3.80 MHz and key down.
uPush [TRANSMIT] to return to the receive condition.
49
5
RECEIVE AND TRANSMIT
■Optional external tuner operation
•AH-4/AH-3 HF AUTOMATIC ANTENNA
TUNER
The AH-4/AH-3 matches the IC-756PRO 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. 20 for the transceiver and AH-4/AH-3 connection.
•See the AH-4/AH-3 instruction manual for AH-4/AH-3 in-
stallation and antenna connection details.
AH-4/AH-3 setting example:
RWARNING: HIGH VOLTAGE!
NEVER touch the antenna element while tuning
or transmitting.
NEVER operate the AH-4/AH-3 without an antenna
wire.The tuner and transceiver will be damaged.
NEVER operate the AH-4/AH-3 when it is not
grounded.
Transmitting before tuning may damage the trans-
ceiver. Note that the AH-4/AH-3 cannot tune when
using a 1⁄2λlong wire or multiple of the operating fre-
quency.
•When connecting the AH-4/AH-3, the antenna
connector assignments are [ANT2] for the internal
tuner and [ANT1] for the AH-4/AH-3. The antenna
indicator in the LCD displays “ANT1(EXT)”when
the AH-4/AH-3 is connected and selected.
•The AH-3 can be used for HF bands only. It can-
not be used for the 50 MHz band.
•AH-4/AH-3 operation
Tuning is required for each frequency. Be sure to
re-tune the antenna before transmitting when you
change the frequency—even slightly.
qSet the desired frequency in an HF or 50 MHz
band for using with the AH-4. Set the desired fre-
quency in an HF band for using with the AH-3.
•The AH-4/AH-3 will not operate on frequencies outside
of ham bands.
wPush [TUNER] for 2 sec.
•The [TUNER] light blinks while tuning.
eThe [TUNER] light lights constantly when tuning is
complete.
•When the connected wire cannot be tuned, the
[TUNER] light goes out, the AH-4/AH-3 is bypassed
and the antenna wire is connected to the antenna con-
nector on the transceiver directly.
rTo bypass the AH-4/AH-3 manually, push
[TUNER].
When using an external antenna tuner such as the
IC-PW1’s tuner, IC-4KL’s tuner or IC-AT500 with a lin-
ear amplifier, tune with the external antenna tuner,
while the internal tuner is turned OFF. After tuning is
completed, turn the internal tuner ON. Otherwise,
both tuners tune simultaneously and correct tuning
may not be obtained.
See the instruction manual included with each an-
tenna tuner for their respective operations.
•ANTENNA TUNER OF THE IC-PW1, IC-4KL or IC-2KL/IC-AT500
6
50
MEMORY OPERATION
■Memory channels
The transceiver has 101 memory channels.The mem-
ory mode is very useful for quickly changing to often-
used 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 selection
MEMORY
CHANNEL
MEMORY
CHANNEL
NUMBER CAPABILITY TRANSFER
TO VFO OVER-
WRITING CLEAR
Regular memory
channels 1–99 One frequency and one mode in
each memory channel. Yes Yes Ye s
No
Scan edge
memory
channels P1, P2 One frequency and one mode in
each memory channel as scan
edges for programmed scan. Yes Ye s
•Using the [YY] or [ZZ] keys
qPush [VFO/MEMO] to select memory mode.
wPush [Y]/[Z] several times to select the desired
memory channel.
•Push and hold [Y]/[Z] for continuous selection.
•[UP] and [DN] on the microphone can also be used.
eTo return to VFO mode, push [VFO/MEMO] again.
•Using the keypad
qPush [VFO/MEMO] to select memory mode.
wPush [F-INP].
ePush the desired memory channel number using
the keypad.
•Enter 100 or 101 to select scan edge channel P1 or P2,
respectively.
rPush [Y] or [Z] to select the desired memory
channel.
ANT
ANT
1
METER
METER
Po
Po
SFT
SFT
0
FIL2
FIL2
CW
CW
qw:pp
TX
TX
USB
USB
qr≥qot≥pp
14.100.00
14.100.00
BPF
BPF
1
VFO
VFO
BW
BW
500
500
ANT
ANT
1
METER
METER
Po
Po
SFT
SFT
0
FIL2
FIL2
USB
USB
qw:pp
TX
TX
CW
CW
qr≥qpp≥pp
14.195.00
14.195.00
VFO
VFO
1
BW
BW
2.4k
2.4k
ANT
ANT
1
METER
METER
Po
Po
SFT
SFT
0
FIL2
FIL2
USB
USB
qw:pp
TX
TX
wr≥oyp≥pp
12
12
BW
BW
2.4k
2.4k
CW
CW
14.195.00
14.195.00
VFO
VFO
VFO/
MEMO
or
F-INPENT
ANT
ANT
1
METER
METER
Po
Po
SFT
SFT
0
FIL2
FIL2
USB
USB
qw:pp
TX
TX
CW
CW
qr≥qpp≥pp
14.195.00
14.195.00
VFO
VFO
1
BW
BW
2.4k
2.4k
ANT
ANT
1
METER
METER
Po
Po
SFT
SFT
0
FIL2
FIL2
USB
USB
TX
TX
CW
CW
≥qpp≥qw
14.195.00
14.195.00
VFO
VFO
1
BW
BW
2.4k
2.4k
ANT
ANT
1
METER
METER
Po
Po
SFT
SFT
0
FIL2
FIL2
USB
USB
qw:pp
TX
TX
wr≥oyp≥pp
12
12
BW
BW
2.4k
2.4k
CW
CW
14.195.00
14.195.00
VFO
VFO
F-in
P
12
or
then
51
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 mem-
ory channel screen.
You can select a desired memory channel from the
memory channel screen.
•Selecting a memory channel using the
memory channel screen
qPush [EXIT] one or more times to close a multi-
function screen, if necessary.
wPush [(F-3)MEMORY] to select the memory chan-
nel screen.
•[(F-5)WIDE] toggles the standard and wide screens.
eRotate the tuning dial while pushing [(F-2)SET] to
select the desired memory channel.
•[Y] and [Z] can also be used.
rPush [EXIT] to exit the memory channel screen.
•Confirming programmed memory
channels
qSelect the memory channel screen as described
above.
wRotate the tuning dial while pushing [(F-1)ROLL]
to scroll the screen.
ePush [(F-2)SET] to select the highlighted memory
channel, if desired.
rPush [EXIT] to exit the memory channel screen.
•Setting a memory channel as a select
memory
Select memory channels are used for select memory
scan. Select memory scan repeatedly scans the se-
lect memory channels only. This is useful to speedup
the memory scan interval. Of course, select memory
channels are also scanned during normal memory
scan.
qSelect the memory channel screen as described
at left.
wRotate the tuning dial while pushing [(F-2)SET] to
select the desired memory channel.
•[Y] and [Z] can also be used.
ePush [(F-3)SELECT] to set the memory channel
as a select memory or not.
rRepeat steps wto eto program another memory
channel as a select memory channel, if desired.
tPush [EXIT] to exit the memory channel screen.
Setting select memory channels is also possible in
the scan screen.
52
6MEMORY OPERATION
■Memory channel programming
Memory channel programming can be preformed ei-
ther in VFO mode or in memory mode.
•Programming in VFO mode
qSet the desired frequency and operating mode in
VFO mode.
wPush [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 chan-
nel readout (below the frequency readout).
•“--.---.--”appears if the selected memory channel is a
blank channel (and does not have contents).
ePush [MW] for 2 sec. to program the displayed fre-
quency and operating mode into the memory
channel.
[EXAMPLE]: Programming 7.088 MHz/LSB into
memory channel 12.
•Programming in memory mode
qSelect the desired memory channel with [Y]/[Z] in
memory mode.
•Memory channel contents appear in the memory chan-
nel readout (below the frequency readout).
•“--.---.--”appears if the selected memory channel is a
blank channel (and does not have contents).
wSet the desired frequency and operating mode in
memory mode.
•To program a blank channel, use direct frequency entry
with the keypad or memo pads, etc.
ePush [MW] for 2 sec. to program the displayed fre-
quency and operating mode into the memory
channel.
[EXAMPLE]: Programming 21.280 MHz/USB into
memory channel 18.
53
6
MEMORY OPERATION
■Frequency transferring
The frequency and operating mode in a memory chan-
nel can be transferred to the VFO. Frequency transferring can be performed in either VFO
mode or memory mode.
•Transferring in VFO mode
This is useful for transferring programmed contents to
VFO.
qSelect VFO mode with [VFO/MEMO].
wSelect 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 chan-
nel readout (below the frequency readout).
•“--.---.--”appears if the selected memory channel is a
blank channel. In this case transferring is impossible.
ePush [VFO/MEMO] for 2 sec. to transfer the fre-
quency and operating mode.
•Transferred frequency and operating mode appear on
the frequency readout.
TRANSFERRING EXAMPLE IN VFO MODE
Operating frequency : 21.320 MHz/USB (VFO)
Contents of M-ch 16 : 14.018 MHz/CW
•Transferring in memory mode
This is useful for transferring frequency and operating
mode while operating in memory mode.
When you have changed the frequency or operat-
ing mode in the selected memory channel:
•Displayed frequency and mode are transferred.
•Programmed frequency and mode in the mem-
ory channel are not transferred, and they remain
in the memory channel.
qSelect the memory channel to be transferred with
[Y]/[Z] in memory mode.
•And, set the frequency or operating mode if required.
wPush [VFO/MEMO] for 2 sec. to transfer the fre-
quency and operating mode.
•Displayed frequency and operating mode are trans-
ferred to the VFO.
eTo return to VFO mode, push [VFO/MEMO] mo-
mentarily.
TRANSFERRING EXAMPLE IN MEMORY MODE
Operating frequency : 14.020 MHz/CW (M-ch 16)
Contents of M-ch 16 : 14.018 MHz/CW
54
6MEMORY OPERATION
■Memory names
All memory channels (including scan edges) can be
tagged with alphanumeric names of up to 10 charac-
ters each.
Capital letters, small letters, numerals, some symbols
(! # $ % & ¥ ? " ' ` ^ + – ✱/ .,: ; = < > ( ) [ ] { } | _ _)
and spaces can be used.
•Editing (programming) memory names
qPush [EXIT] one or more times to close a multi-
function screen, if necessary.
wPush [(F-3)MEMORY] to select the memory chan-
nel screen.
eSelect the desired memory channel.
rPush [(F-4)NAME] to edit memory channel name.
•A cursor appears and blinks.
•Memory channel names of blank channels cannot be
edited.
tInput the desired character by rotating the tuning
dial or by pushing the band key for number input.
•Push [ABC] or [abc] to toggle capital and small letters.
•Push [123] or [etc] to toggle numerals and symbols.
•Push [(F-1)Ω] or [(F-2)≈] for cursor movement.
•Push [(F-3)DEL] to delete the selected character.
•Push [(F-4)SPACE] to input a space.
yPush [EXIT] to input and set the name.
•The cursor disappears.
uRepeat steps eto yto program another memory
channel’s name, if desired.
iPush [EXIT] to exit the memory channel screen.
■Memory clearing
Any unnecessary memory channels can be cleared.
The cleared memory channels become blank chan-
nels.
qSelect memory mode with [VFO/MEMO].
wSelect the desired memory channel with [Y]/[Z].
ePush [M-CL] for 2 sec. to clear the contents.
•The programmed frequency and operating mode dis-
appear.
rTo clear other memory channels, repeat steps w
and e.
55
6
MEMORY OPERATION
■Memo pads
The transceiver has a memo pad function to store fre-
quency and operating mode for easy write and recall.
The memo pads are separate from memory channels.
The default number of memo pads is 5, however, this
can be increased to 10 in set mode if desired. (p. 71)
Memo pads are convenient when you want to memo-
rize a frequency and operating mode temporarily, such
as when you find a DX station in a pile-up, or when a
desired station is busy for a long time and you want to
temporarily search for other stations.
Use the transceiver’s memo pads instead of relying on
hastily scribbled notes that are easily misplaced.
•Writing frequencies and operating
modes into memo pads
You can simply write the accessed readout frequency
and operating mode by pushing [MP-W].
When you write a 6th frequency and operating mode,
the oldest written frequency and operating mode are
automatically erased to make room for the new set-
tings.
Each memo pad must have its own unique combi-
nation of frequency and operating mode; memo
pads having identical settings cannot be written.
•Calling up a frequency from a memo
pad
You can simply call up the desired frequency and op-
erating mode of a memo pad by pushing [MP-R] one
or more times.
•Both VFO and memory modes can be used.
•The frequency and operating mode are called up, starting
from the most recently written.
When you call up a frequency and an operating mode
from memo pads with [MP-R], the previously dis-
played frequency and operating mode are automati-
cally stored in a temporary pad. The frequency and
operating mode in the temporary pad can be recalled
by pushing [MP-R] one or more times.
•You may think there are 6 memo pads because 6 different
frequencies (5 are in memo pads and 1 is in the tempo-
rary pad) are called up by [MP-R].
If you change the frequency or operating mode
called up from a memo pad with the tuning dial,
etc., the frequency and operating mode in the tem-
porary pad are erased.
7
56
SCANS
■Scan types
■Preparation
•Channels
For programmed scan:
Program scan edge frequencies into scan edge mem-
ory channels P1 and P2.
For
∂
F scan:
Set the ∂F span (∂F scan range) in the scan screen.
For memory scan:
Program 2 or more memory channels except scan
edge memory channels.
For select memory scan:
Designate 2 or more memory channels as select mem-
ory channels. To designate the channel as a select
memory channel, choose a memory channel, then
push [(F-3)SELECT] in the scan screen (memory
mode) or in the memory channel screen.
•Scan resume ON/OFF
You can select the scan to resume or cancel when de-
tecting a signal, in set mode. Scan resume ON/OFF
must be set before operating a scan. See p. 60 for
ON/OFF setting and scan resume condition details.
•Scan speed
Scan speed can be selected from 2 levels, high or low,
in set mode. See p. 60 for details.
•Squelch condition
•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.
SCAN
STARTS
WITH
PROGRAMMED
SCAN MEMORY SCAN
SQUELCH
OPEN
The scan continues
until it is stopped
manually, and does
not pause even if it
detects signals.
Scan pauses on
each channel when
the scan resume is
ON; not applicable
when OFF.
SQUELCH
CLOSED
Scan stops when detecting a signal.
If you set scan resume ON in set mode, the
scan pauses for 10 sec. when detecting a
signal, then resumes. When a signal disap-
pears while scan is paused, scan resumes
2 sec. later.
PROGRAMMED SCAN
Repeatedly scans between two scan edge frequencies
(scan edge memory channels P1 and P2).
This scan operates in VFO mode.
SELECT MEMORY SCAN
Repeatedly scans all select memory channels.
∂F SCAN
Repeatedly scans within ∂F span area.
This scan operates in memory mode.This scan operates in memory mode.
This scan operates in both VFO and memory modes.
Scan
Scan edge
P1 or P2 Scan edge
P2 or P1
Jump
Mch 1 Mch 5
Mch 2 Mch 3 Mch 4
Mch 6Mch 7Mch 99
MEMORY SCAN
Repeatedly scans all programmed memory channels.
Mch 1 Mch 5
Mch 2 Mch 3 Mch 4
Mch 6Mch 7Mch 99
ß (select)
ß (select)ß (select)
ß (select) ß (select)
Blank channel Blank channel
ß (select)
ß (select)ß (select)
ß (select) ß (select)
ScanScan
–∂F frequency +∂F frequency
Start frequency
Jump
57
7
SCANS
■Programmed scan operation
qPush [EXIT] one or more times to close a multi-
function screen, if necessary.
wSelect VFO mode.
eSelect the desired operating mode.
•The operating mode can also be changed while scan-
ning.
rPush [(F-4)SCAN] to select the scan screen.
tSet [RF/SQL] open or closed.
•See previous page for scan condition.
•If the [RF/SQL] control function is set as “AUTO,”the
squelch is always open in SSB, CW and RTTY modes.
See pgs. 3, 68 for details.
yPush [(F-1)PROG] to start the programmed scan.
•Decimal points blink while scanning.
uWhen the scan detects a signal, the scan stops,
pauses or ignores it depending on the resume set-
ting and the squelch condition.
iTo cancel the scan, push [(F-1)PROG].
If the same frequencies are programmed into the
scan edge memory channel P1 and P2, pro-
grammed scan does not start.
■∂∂F scan operation
qPush [EXIT] one or more times to close a multi-
function screen, if necessary.
wSelect VFO mode or a memory channel.
eSelect the desired operating mode.
•The operating mode can also be changed while scan-
ning.
rPush [(F-4)SCAN] to select the scan screen.
tSet [RF/SQL] open or closed.
•See previous page for scan condition.
•If the [RF/SQL] control function is set as “AUTO,”the
squelch is always open in SSB, CW and RTTY modes.
See pgs. 3, 68 for details.
ySet the ∂F span by pushing [(F-4)∂F SPAN].
•±5 kHz, ±10 kHz, ±20 kHz, ±50 kHz, ±100 kHz, ±500
kHz and ±1000 kHz are selectable.
uSet center frequency of the ∂F span.
iPush [(F-2)∂F] to start the ∂F scan.
•Decimal points blink while scanning.
oWhen the scan detects a signal, the scan stops,
pauses or ignores it depending on the resume set-
ting and the squelch condition.
!0 To cancel the scan, push [(F-2)∂F].
58
7SCANS
■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.
qPush [EXIT] one or more times to close a multi-
function screen, if necessary.
wPush [(F-4)SCAN] to select the scan screen.
eSet for programmed scan or ∂F scan as described
on previous page.
rPush [(F-1)PROG] or [(F-2)∂F] to start a scan.
•Decimal points blink while scanning.
tPush [(F-3)FINE] to start a fine scan.
•“FINE PROGRAM SCAN”or “FINE ∂F SCAN”appears.
yWhen the scan detects a signal, the scan speed
decreases but does not stop.
uPush [(F-1)PROG] or [(F-2)∂F] to stop the scan;
push [(F-3)FINE] to cancel the fine scan.
■Memory scan operation
qPush [EXIT] one or more times to close a multi-
function screen, if necessary.
wSelect memory mode.
eSelect the desired operating mode.
•The operating mode can also be changed while scan-
ning.
rPush [(F-4)SCAN] to select the scan screen.
tSet [RF/SQL] open or closed.
•See p. 56 for scan condition.
•If the [RF/SQL] control function is set as “AUTO,”the
squelch is always open in SSB, CW and RTTY modes.
See pgs. 3, 68 for details.
yPush [(F-1)MEMO] to start the memory scan.
•Decimal points blink while scanning.
uWhen the scan detects a signal, the scan stops,
pauses or ignores it depending on the resume set-
ting and the squelch condition.
iTo cancel the scan, push [(F-1)MEMO].
2 or more memory channels must be programmed
for memory scan to start.
59
7
SCANS
■Select memory scan operation
qPush [EXIT] one or more times to close a multi-
function screen, if necessary.
wSelect memory mode.
eSelect the desired operating mode.
•The operating mode can also be changed while scan-
ning.
rPush [(F-4)SCAN] to select the scan screen.
tSet [RF/SQL] open or closed.
•See p. 56 for scan condition.
•If the [RF/SQL] control function is set as “AUTO,”the
squelch is always open in SSB, CW and RTTY modes.
See pgs. 3, 68 for details.
yPush [(F-1)MEMO] to start the memory scan.
•Decimal points blink while scanning.
uPush [(F-3)SELECT] to start select memory scan;
push [(F-3)SELECT] again to return to memory
scan, if desired.
iWhen the scan detects a signal, the scan stops,
pauses or ignores it depending on the resume set-
ting and the squelch condition.
oTo cancel the scan, push [(F-1)MEMO].
2 or more memory channels must be designated
as select memory channels for select memory
scan to start.
■Setting select memory channels
qPush [EXIT] one or more times to close a multi-
function screen, if necessary.
wSelect memory mode.
ePush [(F-4)SCAN] to select the scan screen.
rSelect the desired memory channel to set as se-
lect memory channel.
tPush [(F-3)SELECT] to set the memory channel
as a select memory or not.
yRepeat steps rto tto program another memory
channel as a select memory channel, if desired.
uPush [EXIT] to exit the scan screen.
Select memory channels can also be set in the
memory channel screen. (p. 51)
60
7SCANS
■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.
qPush [EXIT] one or more times to close a multi-
function screen, if necessary.
wPush [(F-4)SCAN] to select the scan screen.
ePush [(F-5)SET] to select the scan set mode
screen.
rPush [(F-1)Y] to select the scan speed item.
tRotate the tuning dial to select the scan speed.
•Push [(F-3)DEF] to select the default condition.
yPush [EXIT] twice to exit the set mode.
•Scan resume condition
This item sets the scan resume function ON or OFF.
ON: scan resumes 10 sec. after stopping on a signal
(or 2 sec. after a signal disappears); OFF: scan does
not resume after stopping on a signal.
qPush [EXIT] one or more times to close a multi-
function screen, if necessary.
wPush [(F-4)SCAN] to select the scan screen.
ePush [(F-5)SET] to select the scan set mode
screen.
rPush [(F-2)Z] to select the scan resume condition
item.
tRotate the tuning dial to turn the scan resume
function ON or OFF.
•Push [(F-3)DEF] to select the default condition.
yPush [EXIT] twice to exit the set mode.
61
7
SCANS
■Tone scan
The transceiver can detect the subaudible tone fre-
quency in a received signal. By monitoring a signal
that is being transmitted on a repeater input fre-
quency, you can determine the tone frequency re-
quired to access the repeater.
qSet the desired frequency or memory channel to
be checked for a tone frequency.
wPush [AM/FM] one or more times to select FM
mode.
ePush [(F-5)TONE] for 2 sec. to enter the tone fre-
quency screen.
rPush [(F-1)Y] or [(F-2)Z] to check the repeater
tone frequency or tone squelch frequency, respec-
tively. (pgs. 46, 47)
tPush [(F-5)T-SCAN] to start the tone scan.
•“SCAN”flashes while scanning.
yWhen the tone frequency is detected, the tone
scan pauses.
•The tone frequency is set temporarily on a memory
channel. Program into the memory channel to store the
tone frequency permanently.
•The decoded tone frequency is used for the repeater
tone frequency or tone squelch frequency.
uTo stop the scan, push [EXIT].
iPush [EXIT] to exit the tone frequency screen.
8
62
CLOCK AND TIMERS
■Setting the current time
The transceiver has a built-in 24-hour clock with
power-off and power-on timer functions. This is use-
ful when logging QSO’s and so on. The clock indica-
tion is always displayed except after pushing [F-INP].
qPush [EXIT] one or more times to close a multi-
function screen, if necessary.
wPush [(F-5)SET] then [(F-3)TIME] to enter timer
set mode.
ePush [(F-1)Y] or [(F-2)Z] to select the time adjust-
ment item.
rSet the current time using the tuning dial.
•“TIME–set push [SET]”blinks.
tPush [(F-4)SET] to enter the set time.
•Push [EXIT] to cancel the setting.
yPush [EXIT] twice to exit timer set mode.
■Setting power-on time
The transceiver can be set to turn ON automatically
at a specified time.
qPush [EXIT] one or more times to close a multi-
function screen, if necessary.
wPush [(F-5)SET] then [(F-3)TIME] to enter timer
set mode.
ePush [(F-1)Y] or [(F-2)Z] to select the power-on
time item.
rSet the desired power-on time using the tuning
dial.
•“TIMER–set push [SET]”blinks.
tPush [(F-4)SET] to enter the set time.
•Push [EXIT] to cancel the setting.
yPush [EXIT] twice to exit timer set mode.
63
8
CLOCK AND TIMERS
■Setting power-off period
The transceiver can be set to turn OFF automatically
after being activated via the power-on timer. The
power-off period can be set to 5–120 min. in 5 min.
steps.
qPush [EXIT] one or more times to close a multi-
function screen, if necessary.
wPush [(F-5)SET] then [(F-3)TIME] to enter timer
set mode.
ePush [(F-1)Y] or [(F-2)Z] to select the power-off
time item.
rSet the desired power-off time using the tuning
dial.
•“TIMER – set push [SET]”blinks.
tPush [(F-4)SET] to enter the set time.
•Push [EXIT] to cancel the setting.
yPush [EXIT] twice to exit timer set mode.
■Timer operation
qPreset the power-on time and power-off period as
described previously.
wPush [POWER] momentarily to turn the timer func-
tion ON.
•The [POWER] light lights when the timer function is
ON.
ePush [POWER] for 2 sec. to turn the power OFF.
•The [POWER] light lights continuously.
rWhen the set time arrives, the power is automati-
cally turned ON.
tThe transceiver emits 10 beeps and turns OFF
after the power-off period elapses.
•The [POWER] light blinks while beeping.
•Push [POWER] momentarily to cancel the power-off
timer, if desired.
9
64
SET MODE
■Set mode description
Set mode is used for programming infrequently
changed values or conditions of functions. This trans-
ceiver has a level set mode, display set mode, timer
set mode and miscellaneous (others) set mode.
•Set mode operation
qPush [EXIT] one or more times to close a multi-
function screen, if necessary.
wPush [(F-5)SET] to select the set mode screen.
ePush [(F-1)LEVEL], [(F-2)DISP], [(F-3)TIME] or
[(F-4)OTHERS] to enter the desired set mode.
rFor display or miscellaneous (others) set mode,
push [(F-5)WIDE] to toggle wide and normal
screen.
tPush [(F-1)Y] or [(F-2)Z] to select the desired item.
ySet the desired condition using the tuning dial.
•Push [(F-3)DEF] to select a default condition or value.
uFor timer set mode, push [(F-4)SET] to enter the set
time.
iPush [EXIT] twice to exit the set mode.
F-1
F-2
F-3
F-5
F-4
•Level set mode (p. 65)
•Start up screen
•Set mode screen
•Display set mode (p. 66)
•Timer set mode (pgs. 62, 67)
•Miscellaneous (others) set mode (p. 68)
ANTANT
1
METERMETER
PoPo
P.AMPP.AMP
1
ATTATT
OFFOFF
VOXVOX
OFFOFF
COMPCOMP
OFFOFF
WIDEWIDE
SCOPESCOPE VOICEVOICE MEMORYMEMORY SCANSCAN SETSET
SFTSFT 0
FIL2FIL2
USBUSB
qw:pp
AGCAGC
MIDMID
TXTX
VFOVFO USBUSB
USBUSB
USBUSB
FIL2FIL2
qr≥qot≥pp
qr≥wpt≥pp
14.100.0014.100.00
14.100.0014.100.00
1
1
VFOVFO
BWBW 2.4k2.4k
ANTANT
1
METERMETER
PoPo
P.AMPP.AMP
1
ATTATT
OFFOFF
VOXVOX
OFFOFF
COMPCOMP
OFFOFF
WIDEWIDE
SFTSFT 0
FIL2FIL2
USBUSB
qw:pp
AGCAGC
MIDMID
TXTX
VFOVFO USBUSB
USBUSB
USBUSB
FIL2FIL2
qr≥qot≥pp
qr≥wpt≥pp
14.100.0014.100.00
14.100.0014.100.00
1
1
VFOVFO
BWBW 2.4k2.4k
LEVELLEVEL DISPDISP TIMETIME OTHERSOTHERS
SET MODESET MODE
VOXVOX
OFFOFF
COMPCOMP
OFFOFF
WIDEWIDE
AGCAGC
MIDMID
VOXVOX
OFFOFF
COMPCOMP
OFFOFF
WIDEWIDE
AGCAGC
MIDMID
éèDEF
LEVEL SET
DEFDEF WIDEWIDE
BK-INBK-IN
OFFOFF
1/41/4
OFFOFF
AGCAGC
MIDMID
éè
VOXVOX
OFFOFF
COMPCOMP
OFFOFF
WIDEWIDE
AGCAGC
MIDMID
éèDEF
WIDEWIDE
TIME SETTIME SET
éè
DISPLAY SET
SETSETMODEMODEMENUMENU
LEVELLEVELTXTXTone,Monitor,SideTone,Monitor,SideToneToneetcetc
DISPDISPBright,Contrast,Style,FontBright,Contrast,Style,Fontetcetc
TIMETIMEClock/TimerClock/Timer
OTHERSOTHERSOtherOtherSetSetModeMode
CalibrationCalibrationMarkerMarker OFFOFF
Beep(Confirmation)Beep(Confirmation) ONON
Beep(BandBeep(BandEdge)Edge) ONON
RF/SQLRF/SQLControlControl RF+SQLRF+SQL
QuickQuickDualwatchDualwatch ONON
QuickQuickSPRITSPRIT ONON
FMFMSPLITSPLITOffset(HF)Offset(HF) -0.100MHz-0.100MHz
OTHERSOTHERSSETSET
TimeTime(Now)(Now) 12:0012:00
Power-ONPower-ONTimerTimerSetSet 0:000:00
Power-OFFPower-OFFPeriodPeriod 60min60min
SSBTXTone(Bass) 0dB
SSBTXTone(Treble) 0dB
MonitorLevel 50%
SideToneLevel 50%
SideToneLevelLimit ON
BeepLevel 50%
BeepLevelLimit ON
Contrast(LCD) 60%
Bright(LCD) 50%
Horizon 4
Backlight(Switches) 8
DisplayType A
DisplayFont Basic1
MemoryName ON
65
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.
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.
Monitor Level
This item adjusts the transmit IF signal monitor level
from 0 % to 100 % in 1 % steps.
See p. 35 for details.
Side Tone Level
This item adjusts the CW side tone level from 0 % to
100 % in 1 % steps.
See p. 35 for details.
Beep Level
This item adjusts the volume level for confirmation
beep tones from 0 % to 100 % in 1 % steps. When
beep tones are turned OFF, this setting has no effect.
Beep Level Limit
This item allows you to set a maximum volume level
for confirmation beep tones. Confirmation beep tones
are linked to the [AF] control until a specified volume
level is reached—further rotation of the [AF] control
will not increase the volume of the beep tones.
OONN
Beep level is limited with
[AF] (default)
OOFFFF
Beep level is linked to [AF]
Side Tone Level Limit
This item allows you to set a maximum volume level
for CW side tones. CW side tones are linked to the
[AF] control until a specified volume level is reached
—further rotation of the [AF] control will not increase
the volume of the CW side tones.
OONN
CW side tone level is limited
with [AF] (default)
OOFFFF
CW side tone level is linked
to [AF]
66
9SET MODE
■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)
This item adjusts the contrast of the LCD from 0 % to
100 % in 1 % steps.
Backlight (LCD)
This item adjusts the brightness of the LCD from 0 %
to 100 % in 1 % steps.
Horizon
This item adjusts the horizontal position of the LCD
from 1 to 8.
Backlight (switches)
This item adjusts the brightness of the switches from
1 to 8.
Display Type
This item sets the LCD screen type. There are 4 se-
lectable types: A, B, C and D.
AA
A-type LCD screen (default)
Display Font
This item sets the font of the frequency readouts.
There are 7 selectable fonts: Basic 1, Basic 2, Pop,
7seg (7 segment numeral), Italic 1, Italic 2 and Clas-
sic.
BBaassiicc11
Basic 1 font (default)
Memory Name
This item sets the memory name indication ON and
OFF.
See p. 54 for details.
OONN
Memory name is displayed.
(default)
OOFFFF
Memory name is not dis-
played.
67
9
SET MODE
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.
qPush [EXIT] one or more times to close a multi-
function screen, if necessary.
wPush [(F-5)SET] then [(F-2)DISP] to select the dis-
play set mode screen.
ePush [(F-2)Z] one or more times to select the ‘My
Call’item.
rPush [(F-4)EDIT] to edit.
•A cursor appears and blinks.
tInput the desired character by rotating the tuning
dial or by pushing the band key for number input.
•Push [ABC] to select capital letters.
•Push [123] or [etc] to toggle numerals and symbols.
•Push [(F-1)Ω] or [(F-2)≈] for cursor movement.
•Push [(F-3)DEL] to delete the selected character.
•Push [(F-4)SPACE] to input a space.
yPush [EXIT] to input the set name.
•The cursor disappears.
uPush [EXIT] to exit the set mode screen.
•Opening screen example
■Timer set mode
Time (now)
This item sets the current time for the built-in 24-hour
clock.
See p. 62 for details.
1155::0000
Push [(F-4)SET] to enter the time.
Power-ON timer set
This item sets the power-on time.
See p. 62 for details.
1155::0000
Push [(F-4)SET] to enter the time.
Power-OFF period
This item sets the power-off period for automatic shut-
down after the power-on timer has turned power ON.
See p. 63 for details.
6600mmiinn
Push [(F-4)SET] to enter the time.
■Display set mode (continued)
68
9SET MODE
■Miscellaneous (others) set mode
Calibration Marker
This item is used for a simple frequency check of the
transceiver.
See p. 76 for calibration procedure.
Turn the calibration marker OFF after checking the
frequency of the transceiver.
OONN
Calibration marker ON
OOFFFF
Calibration marker OFF
(default)
Beep (Confirmation)
A beep sounds each time a switch is pushed to con-
firm it. This function can be turned OFF for silent op-
eration.
The volume level can be set in level set mode. (p. 65)
OONN
Confirmation beep ON
(default)
OOFFFF
Confirmation beep OFF
Beep (Band Edge)
A beep sounds when an operating frequency enters
or exits an amateur band.This functions independent
of the confirmation beep setting (above).
The volume level can be set in level set mode. (p. 65)
OONN
Band edge beep ON
(default)
OOFFFF
Band edge beep OFF
Quick Dualwatch
When this item is set to ON, pushing [DUALWATCH]
for 2 sec. sets the sub readout frequency to the main
readout frequency and activates dualwatch operation.
See p. 31 for details.
OONN
Quick dualwatch ON
(default)
OOFFFF
Quick dualwatch OFF
Quick SPLIT
When this item is set to ON, pushing [SPLIT] for 2
sec. sets the sub readout frequency to the main read-
out frequency and activates split operation.
See p. 33 for details.
OONN
Quick split ON
(default)
OOFFFF
Quick split OFF
RF/SQL Control
The [RF/SQL] control can be set as the RF/squelch
control (default), the squelch control only (RF gain is
fixed at maximum) or ‘Auto’(RF gain control in SSB,
CW and RTTY; squelch control in AM and FM).
See p. 3 for details.
RRFF++SSQQLL[RF/SQL] control as RF/squelch control
(default)
SSQQLL[RF/SQL] control as squelch control
AAUUTTOO[RF/SQL] control as RF gain control in
SSB, CW and RTTY; squelch control in
AM and FM
69
9
SET MODE
■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.
The offset frequency can be set from –4 MHz to +4
MHz in 1 kHz steps.
--00..110000MMHHzz
Minus 0.1 MHz offset
(default)
--44..000000MMHHzz
Minus 4.0 MHz offset
FM SPLIT Offset (50M)
This item sets the offset (difference between transmit
and receive frequencies) for the quick split function.
However, this setting is used for 50 MHz band FM
mode only, and is used to input the repeater offset for
the 50 MHz band.
The offset frequency can be set from –4 MHz to +4
MHz in 1 kHz steps.
--11..000000MMHHzz
Minus 1.0 MHz offset
(default)
++44..000000MMHHzz
Plus 4.0 MHz offset
SPLIT Lock
When this item is ON, the tuning dial can be used to
adjust the transmit frequency while pushing [XFC]
even while the lock function is activated.
See p. 32 for split frequency operation details.
OONN
Split lock function ON
OOFFFF
Split lock function OFF
(default)
Tuner (Auto Start)
The internal antenna tuner has an automatic start ca-
pability which starts tuning if the SWR is higher than
1.5–3.
When “OFF”is selected, the tuner remains OFF even
when the SWR is poor (1.5–3). When “ON”is se-
lected, automatic tune starts even when the tuner is
turned OFF.
OONN
Automatic tuner start
ON
OOFFFF
Automatic tuner start
OFF (default)
Tuner (PTT Start)
Tuning of the internal antenna tuner can be started
automatically at the moment the PTT is pushed after
the operating frequency is changed (more than 1%
from last-tuned frequency).
OONN
Automatic PTT start
ON
OOFFFF
Automatic PTT start
OFF (default)
70
9SET MODE
■Miscellaneous (others) set mode (continued)
RTTY Mark Frequency
This item selects the RTTY mark frequency. RTTY
mark frequency is toggled between 1275, 1615 and
2125 Hz.
22112255
2125 Hz RTTY mark
frequency (default)
11227755
1275 Hz RTTY mark
frequency
RTTY Shift Width
This item adjusts the RTTY shift width. There are 3
selectable values: 170, 200 and 425 Hz.
117700
170 Hz RTTY shift
frequency (default)
442255
425 Hz RTTY shift
frequency
RTTY Keying Polarity
This item selects the RTTY keying polarity. Normal or
reverse keying polarity can be selected.
When reverse polarity is selected, Mark and Space
are reversed.
- Normal : Key open/close = Mark/Space
- Reverse : Key open/close = Space/Mark
NNOORRMMAALL
Normal polarity (default)
RREEVVEERRSSEE
Reverse polarity
RTTY Decode USOS
This item selects the USOS (UnShift On Space) func-
tion of the internal RTTY decoder.
See p. 41 for details.
OONN
Decode as letter code
(default)
OOFFFF
Decode as character code
[ANT] Switch
You can set the antenna connector selection to auto-
matic, manual or non-selection (when using 1 an-
tenna only).
When “Auto”is selected, the antenna switch is acti-
vated and the band memory memorizes the selected
antenna. See p. 45 for details.
When “Manual”is selected, the antenna switch is ac-
tivated and selects an antenna manually.
When “OFF”is selected, the antenna switch is not ac-
tivated and does not function. The [ANT1] connector
is always selected in this case.
AAuuttooAntenna switch is activated and the
selection is automatically memorized.
(default)
MMaannuuaallAntenna switch is activated.
OOFFFFAntenna switch is deactivated and
[ANT1] is always selected.
71
9
SET MODE
■Miscellaneous (others) set mode (continued)
RTTY Decode New Line Code
This item selects the new line code of the internal
RTTY decoder. See p. 41 for details.
CR : Carriage Return
LF : Line Feed
CCRR,,LLFF,,CCRR++LLFF
CR, LF and CR+LF
(default)
CCRR++LLFF
CR+LF only
Speech Language
When the optional UT-102
VOICE SYNTHESIZER UNIT
is
installed, you can select between English and Japan-
ese as the language.
See p. 73 for unit installation.
EEnngglliisshh
English announcement
(default)
JJaappaanneessee
Japanese announcement
Speech Speed
When the optional UT-102
VOICE SYNTHESIZER UNIT
is
installed, you can select between faster or slower syn-
thesizer output.
See p. 73 for unit installation.
HHIIGGHH
Faster announcement
(default)
LLOOWW
Slower announcement
Speech S-Level
When the optional UT-102
VOICE SYNTHESIZER UNIT
is
installed, you can have frequency, mode and signal
level announcement. Signal level announcement can
be deactivated if desired.
When “OFF”is selected, the signal level is not an-
nounced.
See p. 73 for unit installation.
OONN
Signal level announcement
(default)
OOFFFF
No signal level
announcement
Memo Pad Numbers
This item sets the number of memo pad channels
available. 5 or 10 memo pads can be set.
55
5 memo pads
(default)
1100
10 memo pads
MAIN DIAL Auto TS
This item sets the auto tuning step function. When ro-
tating the tuning dial rapidly, the tuning step automat-
ically changes several times as selected.
There are 2 type of auto tuning steps: HIGH (Fastest)
and LOW (Faster).
HHIIGGHHAuto tuning step is turned ON.
Fastest tuning step during rapid rotation
(default)
LLOOWWAuto tuning step is turned ON.
Faster tuning step during rapid rotation
OOFFFFAuto tuning step is turned OFF.
72
9SET MODE
■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 automati-
cally set according to the connected controller or re-
mote controller.
AAUUTTOO
Auto baud rate
(default)
1199220000
19200 bps
CI-V address
To distinguish equipment, each CI-V transceiver has
its own Icom standard address in hexadecimal code.
The IC-756PRO’s address is 5Ch.
When 2 or more IC-756PRO’s are connected to an
optional CT-17
CI
-
V LEVEL CONVERTER
, rotate the tun-
ing dial to select a different address for each
IC-756PRO in the range 01h to 7Fh.
55CChh
Address of 5Ch
(default)
77FFhh
Address of 7Fh
CI-V transceive
Transceive operation is possible with the IC-756PRO
connected to other Icom HF transceivers or receivers.
When “ON”is selected, changing the frequency, op-
erating mode, etc. on the IC-756PRO automatically
changes those of connected transceivers (or re-
ceivers) and vice versa.
OONN
Transceive ON
(default)
OOFFFF
Transceive OFF
CI-V with IC-731
When connecting the IC-756PRO to the IC-735 for
transceive operation, you must change the operating
frequency data length to 4 bytes.
•This item must be set to “ON”only when operating trans-
ceiver with the IC-735.
OONN
4 bytes of frequency data
OOFFFF
5 bytes of frequency data
(default)
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.
HHIIGGHH
High speed (default,
50 tuning steps/sec.)
LLOOWW
Low speed
(25 tuning steps/sec.)
10
73
OPTION INSTALLATION
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.
■Opening the transceiver’s case
The UT-102 announces the accessed readout’s fre-
quency, mode, etc. (S-meter level can also be an-
nounced—p. 71) in a clear, electronically-generated
voice, in English (or Japanese).
➥Push [SPEECH] to announce the frequency, etc.
qRemove the top and bottom covers as shown
above.
wRemove the protective paper attached to the bot-
tom of the UT-102 to expose the adhesive strip.
ePlug UT-102 into J3502 on the MAIN unit as
shown in the diagram at right.
rReturn the top and bottom covers to their original
positions.
■UT-102
VOICE SYNTHESIZER UNIT
qRemove 2 screws from the left side of the trans-
ceiver to remove the carrying handle as shown
below.
wRemove 7 screws from the top of the transceiver
and 4 screws from the sides, then lift up the top
cover.
eTurn the transceiver upside down.
rRemove 6 screws from the bottom of the trans-
ceiver, then lift up the bottom cover.
11
74
MAINTENANCE
■Troubleshooting
The following chart is designed to help you correct
problems which are not equipment malfunctions. If you are unable to locate the cause of a problem or
solve it through the use of this chart, contact your near-
est Icom Dealer or Service Center.
PROBLEM POSSIBLE CAUSE SOLUTION REF.
POWER
Power does not come on
when the [POWER] switch
is pushed.
•DC power cable is improperly connected.
•Fuse is blown.
•Reconnect the DC power cable correctly.
•Check for the cause, then replace the fuse with
a spare one.
(Fuses are installed in the DC power cable and
the internal PA unit.)
p. 17
p. 75
RECEIVE
No sound comes from the
speaker.
•Volume level is too low.
•The squelch is closed.
•The transceiver is in the transmitting condition.
•Rotate [AF] clockwise to obtain a suitable
listening level.
•Rotate [RF/SQL] to 10 o’clock position to open
the squelch.
•Push [TRANSMIT] to receive or check the
SEND line of an external unit, if desired.
p. 2
p. 3
p. 2
TRANSMIT
Transmitting is impossi-
ble.
•The operating frequency is not set to a ham
band.
•Set the frequency to a ham band. p. 24
Sensitivity is low. •The antenna is not connected properly.
•The antenna for another band is selected.
•The antenna is not properly tuned.
•The attenuator is activated.
•Reconnect to the antenna connector.
•Select an antenna suitable for the operating
frequency.
•Push [TUNER] for 2 sec. to manually tune the
antenna.
•Push [ATT] one or more times to select “ATT
OFF.”
—
pgs. 5,
45
p. 48
p. 5
Receive audio is distorted. •The operating mode is not selected correctly.
•PBT function is activated.
•Noise blanker function is activated.
•Preamp is activated.
•The noise reduction is activated and the [NR]
control is set too far clockwise.
•Select a suitable operating mode.
•Push [PBT CLR] for 2 sec. to reset the function.
•Push [NB] to turn the function OFF.
•Push [P.AMP] once or twice to turn the function
OFF.
•Set the [NR] control for maximum readability.
p. 26
p. 26
p. 27
p. 5
p. 27
The [ANT] switch does not
function.
•The antenna switch has not been activated. •Set the antenna switch in set mode to “Auto” or
“Manual.”p. 45
SCAN
Programmed scan does
not stop.
•Squelch is open.
•[RF/SQL] is assigned to RF gain control and
squelch is open.
•Set [RF/SQL] to the threshold point.
•Reset [RF/SQL] control assignment and set it to
the threshold point.
p. 3
pgs.
3, 68
Output power is too low. •[RF POWER] is set too far counterclockwise.
•[MIC GAIN] is set too far counterclockwise.
•The antenna for another band is selected.
•The antenna is not properly tuned.
•Rotate [RF POWER] clockwise.
•Set [MIC GAIN] to a suitable position.
•Select an antenna suitable for the operating
frequency.
•Push [TUNER] for 2 sec. to manually tune the
antenna.
p. 3
p. 2
p. 5
p. 48
No contact possible with
another station.
•RIT or ∂TX function is activated.
•Split frequency function and/or dualwatch are
activated.
•Push [RIT] or [∂TX] to turn the function OFF.
•Push [SPLIT] and/or [DUALWATCH] to turn the
function OFF.
p. 6
pgs. 7
31, 32
Transmitted signals are
distorted.
•[MIC GAIN] is set too far clockwise. •Set [MIC GAIN] to a suitable position. p. 2
Repeater cannot be
accessed.
•Split frequency function is not activated.
•Programmed subaudible tone frequency is
wrong.
•Push [SPLIT] to turn the function ON.
•Reset the frequency using set mode.
p. 7
p. 46
Programmed scan does
not start.
•The same frequencies have been programmed
in scan edge memory channels P1 and P2.
•Program different frequencies in scan edge
memory channels P1 and P2.
p. 52
Memory scan does not
start.
•2 or more memory channels have not been
programmed.
•Program 2 or more memory channels. p. 52
Select memory scan does
not start.
•2 or more memory channels have not been
designated as select channels.
•Designate 2 or more memory channels as select
channels for the scan.
pgs. 51,
59
75
11
MAINTENANCE
■Fuse replacement
If a fuse blows or the transceiver stops functioning, try
to find the source of the problem, and replace the dam-
aged fuse with a new, rated fuse.
CAUTION:DISCONNECT the DC power cable
from the transceiver when changing a fuse.
The IC-756PRO has 2 types of fuses installed for
transceiver protection.
•DC power cable fuses ................................FGB 30 A
•Circuitry fuse ................................................FGB 5 A
DC POWER CABLE FUSE REPLACEMENT
30 A
fuse
■Clock backup battery replacement
The transceiver has a lithium backup battery
(CR2032) inside for clock and timer functions. The
usual life of the backup battery is approximately 2
years.
When the backup battery is exhausted, the trans-
ceiver transmits and receives normally but cannot re-
tain the current time.
See p. 77 for battery location.
CIRCUITRY FUSE REPLACEMENT
The 13.8 V DC from the DC power cable is applied to
all units in the IC-756PRO, except for the power am-
plifier, through the circuitry fuse. This fuse is installed
in the PA unit.
qRemove the top cover as shown on p. 73.
wRemove 11 screws from the PA shielding plate,
then remove the plate.
eReplace the circuitry fuse as shown in the diagram
below.
rReplace the PA shielding plate and top cover.
PROBLEM POSSIBLE CAUSE SOLUTION REF.
DISPLAY
The displayed frequency
does not change properly.
•The dial lock function is activated.
•A set mode screen is selected.
•The internal CPU has malfunctioned.
•Push [LOCK] to deactivate the function.
•Push [EXIT] one or more times to exit the set
mode screen.
•Reset the CPU.
p. 6
pgs.
11, 64
p. 22
76
11 MAINTENANCE
■Tuning dial brake adjustment
The tension of the tuning dial may be adjusted to suit
your preference.
The brake adjustment screw is located on the right
side of the tuning dial. See the figure at right.
Turn the brake adjustment screw clockwise or coun-
terclockwise to obtain a comfortable tension level
while turning the dial continuously and evenly in one
direction.
■Frequency calibration (approximate)
A very accurate frequency counter is required to cali-
brate the frequency of the transceiver. However, a
rough check may be performed by receiving radio sta-
tion WWV, or other standard frequency signals.
CAUTION: Your transceiver has been thoroughly
adjusted and checked at the factory before being
shipped. You should not calibrate frequencies, ex-
cept for special reasons.
qPush [SSB] to select USB mode.
wPush [PBT CLR] for 2 sec. to clear the PBT set-
tings and make sure that the RIT/∂TX function is
not activated.
eSet the frequency to the standard frequency sta-
tion minus 1 kHz.
•When receiving WWV (10.000.00 MHz) as a standard
frequency, set the operating frequency for 9.999.00
MHz.
•Other standard frequencies can also be used.
rPush [EXIT] one or more times to close a multi-
function screen, if necessary.
tPush [(F-5)SET] to select the set mode screen.
yPush [(F-4)OTHERS] to enter miscellaneous (oth-
ers) set mode.
uPush [(F-1)Y] several times to select the “Calibra-
tion marker”item.
iRotate the tuning dial clockwise to turn the calibra-
tion marker ON.
•Side tone may be heard.
oAdjust the calibration pot on the right side panel of
the transceiver for a zero beat with the received
standard signal as shown below.
•Zero beat means that two signals are exactly the same
frequency, resulting in a single tone being emitted.
!0 Rotate the tuning dial counterclockwise to turn the
calibration marker OFF.
!1 Push [EXIT] twice to exit set mode.
12
77
INTERNAL VIEWS
PA fuse (FGB 5 A)
PA unit
FILTER unit
Internal antenna
tuner
•Top view
RF unit
PLL unit Space for optional
voice synthesizer
(UT-102)
MAIN unit
Clock backup battery
•Bottom view
13
78
CONTROL COMMAND
•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 Communi-
cations Interface-V (CI-V) controls the following func-
tions of the transceiver.
Up to 4 Icom CI-V transceivers or transceivers can be
connected to a personal computer equipped with an
RS-232C port. See p. 72 for setting the CI-V condition
using set mode.
•Data format
The CI-V system can be operated using the following
data formats. Data formats differ according to com-
mand numbers. A data area or sub command is added
for some commands.
CONTROLLER TO IC-756PRO
FE
FE
FE 5C E0 Cn Sc Data area FD
Preamble code (fixed)
Transceiver’s default address
Controller’s default address
Command number
(see table at right)
Sub command number
(see table at right)
BCD code data for frequency or
memory number entry
End of message code (fixed)
OK MESSAGE TO CONTROLLER
FE FE E0 5C FB FD
Preamble code (fixed)
Controller’s default address
Transceiver’s default address
OK code (fixed)
End of message code (fixed)
NG MESSAGE TO CONTROLLER
FE FE E0 5C FA FD
Preamble code (fixed)
Controller’s default address
Transceiver’s default address
NG code (fixed)
End of message code (fixed)
IC-756PRO TO CONTROLLER
FE E0 5C Cn Sc Data area FD
Preamble code (fixed)
Controller’s default address
Transceiver’s default address
Command number
(see table at right)
Sub command number
(see table at right)
BCD code data for frequency or
memory number entry
End of message code (fixed)
qwert y u
qwert y u
■Remote jack (CI-V) information
9–15
V DC
personal
computer
ct- 17
BC-25
(optional)
IC-756PRO
mini-plug cable
79
13
CONTROL COMMAND
•Command table
Sub commandCommand Description
—00 Send frequency data
Same as
command 06
01 Send mode data
—02 Read band edge frequencies
—
—
03 Read operating frequency
04 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
06
—
B0
B1
C0
C1
D0
D1
—
07
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
0001 – 0101*1
Select memory mode
Select memory channel
*1P1=0100, P2=0101
08
—09 Memory write
—0A Memory to VFO
—0B Memory clear
00
01
02
03
12
13
22
23
A1 – A7
B0
B1
D0
D3
0E
Scan stop
Programmed/memory scan start
Programmed scan start
∂F scan start
Fine programmed scan start
Fine ∂F scan start
Memory scan start
Select memory scan start
Set ∂F scan span
(5 kHz, A2=±10 kHz, A3=±20
kHz, A4=±50 kHz, A5=±100 kHz,
A6=±500 kHz, A7=±1 MHz)
Set as non-select channel
Set as select channel
Set scan resume OFF
Set scan resume ON
00
01
02
03
04
05
06
07
08
10
10 Hz (1 Hz) tuning step
100 Hz tuning step
1 kHz tuning step
5 kHz tuning step
9 kHz tuning step
10 kHz tuning step
12.5 kHz tuning step
20 kHz tuning step
25 kHz tuning step
Sub commandCommand Description
01 + level data
[CW PITCH] setting (0=low pitch
to 255=high pitch)
14
15
16
1A
Read squelch condition
Read S-meter level
01
02
02
12
22
40
41
Set preamp (0=OFF; 1=preamp 1;
2=preamp 2)
Set AGC time constant (1=FAST;
2=MID; 3=SLOW)
Set noise blanker (0=OFF; 1=ON)
Set noise reduction
(0=OFF; 1=ON)
Set auto notch (0=OFF; 1=ON)
Send/read memory contents
Send/read band stacking register
contents
Send/read CW keyer contents
00
01
02
[AF] level setting (0=max. CCW
to 255=max. CW)
[RF] level setting (0=max. CCW
to 255=11 o’clock)
[SQL] level setting (0=11 o’clock
to 255=max. CW)
[NR] level setting (0=min. to
255=max.)
Inside [TWIN PBT] setting or
IF shift setting (0=max. CCW,
128=center, 255=max. CW)
Outside [TWIN PBT] setting
(0=max. CCW, 128=center,
255=max. CW)
09 + level data
08 + level data
07 + level data
06 + level data
03 + level data
02 + level data
00
01
0F Turn the split function OFF
Turn the split function ON
48 Set manual notch (0=OFF; 1=ON)
49 Set RTTY filter notch
(0=OFF; 1=ON)
42 Set repeater tone (0=OFF; 1=ON)
43 Set tone squelch (0=OFF; 1=ON)
44 Set speech compressor
(0=OFF; 1=ON)
45 Set monitor (0=OFF; 1=ON)
46 Set VOX function (0=OFF; 1=ON)
47 Set break-in (0=OFF; 1=ON)
19 Read the transceiver ID00
1B Set repeater tone frequency
Set tone squelch tone frequency
00
01
1C Set the transceiver to receive or
transmit condition (0=Rx; 1=Tx)
00
[RF POWER] setting (0=min. to
255=max.)
0A + level data
[MIC GAIN] setting (0=min. to
255=max.)
0B + level data
[KEY SPEED] setting (0=slow to
255=fast)
0C + level data
[NOTCH] setting (0=low freq. to
255=high freq.)
0D + level data
[COMP] setting (0=min. to
255=max.)
0E + level data
[BK-IN DELAY] setting (0=short
delay to 255=long delay)
0F + level data
[BAL] setting (0=max. CCW,
128=center, 255=max. CW)
10 + level data
00
06
12
18
11
Attenuator OFF
Attenuator ON (6 dB)
Attenuator ON (12 dB)
Attenuator ON (18 dB)
Select [ANT1]
Select [ANT2]
(Add 0 or 1 to turn [RX ANT] OFF
or ON, respectively.)
00
01
12
Announce with voice synthesizer
(00=all data; 01=frequency and
S-meter level; 02=receive mode)
00
01
02
13
•General
•Frequency coverage :
Receive 00.030–60.000 MHz*1, *2
Transmit 01.800–01.999*2
03.500–03.999*2
07.000–07.300*2
10.100–10.150*2
14.000–14.350*2
18.068–18.168*2
21.000–21.450*2
24.890–24.990*2
28.000–29.700*2
50.000–54.000*2
*1Some frequency bands are not guaranteed.
*2Depending on version
•Mode : USB, LSB, CW, RTTY, AM,
FM
•Number of memory : 101 (99 regular, 2 scan edges)
channels
•Antenna connector : SO-239×2 and phono
(RCA; 50 Ω)
•Temperature range : –10˚C to +50˚C;
+14˚F to +122˚F
•Frequency stability : Less than ±0.5 ppm 1 min.
after power on. (–10 to 50˚C;
+14 to +122˚F)
•Frequency resolution : 1 Hz
•Power supply : 13.8 V DC ±15%
•Power consumption :
Transmit Max. power 23 A
Receive Standby 3.0 A (typ.)
Max. audio 3.5 A (typ.)
•Dimensions : 340(W) ×111(H)×285(D) mm
(projections not included) 183⁄8(W)×43⁄8(H)×117⁄32(D) in
•Weight (approx.) : 9.6 kg; 21 lb 1 oz
•ACC 1 connector : 8-pin DIN connector
•ACC 2 connector : 7-pin DIN connector
•CI-V connector : 2-conductor 3.5 (d) mm (1⁄8˝)
•Display : 5-inch (diagonal) TFT color
LCD
•Transmitter
•Output power (continuously adjustable):
SSB/CW/RTTY/FM 5–100 W
AM 5–40 W
•Modulation system :
SSB PSN modulation
AM Low power modulation
FM Phase modulation
•Spurious emission : 50 dB (HF bands)
60 dB (50 MHz band)
•Carrier suppression : 40 dB
•Unwanted sideband : 55 dB
suppression
•∂TX variable range : ±9.999 kHz
•Microphone connector : 8-pin connector (600 Ω)
•ELEC-KEY connector :
3-conductor 6.35(d) mm
(1⁄4")
•KEY connector :
3-conductor 6.35(d) mm
(1⁄4")
•SEND connector : Phono (RCA)
•ALC connector : Phono (RCA)
•Receiver
•Receive system : Triple conversion
superheterodyne system
•Intermediate frequencies:
1st 64.455 MHz
2nd 455 kHz
3rd 36 kHz
•Sensitivity (typical) :
SSB, CW, RTTY 0.16 µV (1.80–29.99 MHz)*1
(10 dB S/N) 0.13 µV (50.0–54.0 MHz)*2
AM (10 dB S/N) 13 µV (0.5–1.799 MHz)
2 µV (1.80–29.99 MHz)*1
1 µV (50.0–54.0 MHz)
FM (12 dB SINAD) 0.5 µV (28.0–29.99 MHz)*1
0.32 µV (50.0–54.0 MHz)*2
*1Pre-amp 1 is ON, *2Pre-amp 2 is ON
•Squelch sensitivity (Pre-amp: OFF):
SSB, CW, RTTY Less than 5.6 µV
FM Less than 1 µV
•Selectivity :
SSB, RTTY More than 2.4 kHz/–6 dB
(BW: 2.4 kHz) Less than 2.8 kHz/–60 dB
CW (BW: 500 Hz) More than 500 Hz/–6 dB
Less than 700 Hz/–60 dB
AM (BW: 6 kHz) More than 6.0 Hz/–6 dB
Less than 15.0 Hz/–60 dB
FM (BW: 15 kHz) More than 12.0 Hz/–6 dB
Less than 20.0 Hz/–60 dB
•Spurious and image : More than 70 dB
rejection ratio (except IF through on 50 MHz
band)
•AF output power : More than 2.0 W at 10%
(at 13.8 V DC) distortion with an 8 Ωload
•RIT variable range : ±9.999 kHz
•PHONES connector : 3-conductor 6.35 (d) mm
(1⁄4˝)
•External SP connector : 2-conductor 3.5 (d) mm
(1⁄8˝)/8Ω
•Antenna tuner
•Matching impedance range:
HF bands 16.7 to 150 Ωunbalanced
(Less than VSWR 3:1)
50 MHz band 20 to 125 Ωunbalanced
(Less than VSWR 2.5:1)
•Minimum operating : 8 W
input power
•Tuning accuracy : VSWR 1.5:1 or less
•Insertion loss : Less than 1.0 dB
(after tuning)
14
80
SPECIFICATIONS
All stated specifications are typical and subject to change without notice or obligation.
15
81
OPTIONS
IC-PW1 HF/50 MHz ALL BAND 1 kW LINEAR AMPLIFIER
Full-duty 1 kW linear amplifier including an automatic antenna tuner. Has
automatic tuning and band selection capability. Full break-in (QSK) oper-
ation is possible. The amplifier/power supply unit and the remote control
unit are separated.
EX-627 AUTOMATIC ANTENNA
SELECTOR
Automatically selects the antenna for
the selected HF ham band. Manual se-
lection is possible for the 50 MHz
band.
•Max. input power: 1000 W PEP
AH-4 HF/50 MHz AUTOMATIC
ANTENNA TUNER
Specially designed to tune a long
wire antenna for portable or mobile
HF operation. The PTT tuner start
function provides simple operation.
•Input power rating: 120 W
AH-2b ANTENNA ELEMENT
A 2.5 m long an-
tenna element for
mobile operation
with the AH-4.
•Frequency
coverage:
3.5–28 MHz bands
with the AH-4
SM-20 DESKTOP MICROPHONE
Unidirectional, electret microphone
for base station operation. Includes
[UP]/[DOWN] switches and a low
cut function.
SP-20 EXTERNAL SPEAKER
4 audio filters; headphone jack; can
connect to 2 transceivers.
•Input impedance: 8 Ω
•Max. input power: 5 W
CT-17 CI-V LEVEL CONVERTER
For remote transceiver control using a
personal computer. You can change
frequencies, operating mode, memory
channels, etc.
IC-AT500
HF AUTOMATIC ANTENNA
TUNER
500 W automatic antenna tuner. In-
cludes an automatic antenna selector
for 4 separate antennas.
IC-2KL
HF 500 W LINEAR AMPLIFIER
All solid-state 500 W linear amplifier.
The power amplifier unit can be sepa-
rately set-up from the power supply unit.
HM-36 HAND MICROPHONE
Hand microphone equipped with the
[UP]/[DOWN] switches.
CT-16 SATELLITE INTERFACE UNIT
Easy tuning when connecting another
Icom VHF transceiver for instant satel-
lite communications.
UT-102 VOICE SYNTHESIZER UNIT
Announces the receive frequency,
mode, S-meter level and current time in
a clear, electronically-generated voice,
in English (or Japanese).
SP-21 EXTERNAL SPEAKER
Designed for base station operation.
•Input impedance: 8 Ω
•Max. input power: 5 W
Count on us!
6-9-16 Kamihigashi, Hirano-ku, Osaka 547-0002 Japan
A-5627H-1EX-q
Printed in Japan
© 1999 Icom Inc.

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