Icom IC-7700 User manual

HF/50 MHz TRANSCEIVER
i7700
Instruction Manual
A-6612H-1EX
Printed in Japan
©2007 Icom Inc.

i
FOREWORD
Thank you for making the IC-7700 your radio of choice. We hope you agree
with Icom’s philosophy of “technology first.” Many hours of research and
development went into the design of your IC-7700.
D FEATURES
❍Ultimate receiver performance: third-order intercept (IP3)
of +40 dBm (HF bands only)
❍Built-in Baudot RTTY and PSK31 modulator/demodulator
and direct PC keyboard connection capability for RTTY
and PSK31 operations without a PC
❍High resolution spectrum scope— center frequency and
fixed frequency modes, plus mini-scope displays
IMPORTANT
READ THIS INSTRUCTION MANUAL CAREFULLY before at-
tempting to operate the transceiver.
SAVE THIS INSTRUCTION MANUAL. This manual contains im-
portant safety and operating instructions for the IC-7700.
EXPLICIT DEFINITIONS
TRADEMARKS
Icom, Icom Inc. and the logo are registered trademarks of Icom
Incorporated (Japan) in the United States, the United Kingdom, Germany,
France, Spain, Russia and/or other countries.
WORD DEFINITION
RRWARNING Personal injury, fire hazard or electric shock may
occur.
CAUTION Equipment damage may occur.
NOTE If disregarded, inconvenience only. No risk of person-
al injury, fire or electric shock.

ii
PRECAUTIONS
RWARNING HIGH RF VOLTAGE! NEVER
attach an antenna or internal antenna connector during
transmission. This may result in an electrical shock or
burn.
RWARNING! NEVER operate the transceiver
with a headset or other audio accessories at high vol-
ume levels. Hearing experts advise against continuous
high volume operation. If you experience a ringing in
your ears, reduce the volume or discontinue use.
RWARNING! Immediately turn the transceiver
power OFF and remove the power cable if it emits an
abnormal odor, sound or smoke. Contact your Icom
dealer or distributor for advice.
RCAUTION! NEVER put the transceiver in any
unstable place (such as on a slanted surface or vi-
brated place). This may cause injury and/or damage to
the transceiver.
RCAUTION! NEVER put the transceiver’s rear
panel side down after lifting up the transceiver by hold-
ing rack mounting handle. This may scratch the sur-
face of the place or damage the connectors on the
transceiver’s rear panel.
RCAUTION! NEVER change the internal set-
tings of the transceiver. This may reduce transceiver
performance and/or damage to the transceiver.
In particular, incorrect settings for transmitter circuits,
such as output power, idling current, etc., might dam-
age the expensive final devices.
The transceiver warranty does not cover any problems
caused by unauthorized internal adjustment.
RCAUTION! NEVER touch the transceiver top
cover when transmitting continuously for long periods.
The top cover may be hot.
RCAUTION! NEVER let metal, wire or other ob-
jects protrude into the transceiver or into connectors
on the rear panel. This may result in an electric shock.
RCAUTION! NEVER block any cooling vents on
the top, rear or bottom of the transceiver.
RCAUTION! NEVER expose the transceiver to
rain, snow or any liquids.
RCAUTION! NEVER install the transceiver in a
place without adequate ventilation. Heat dissipation
may be reduced, and the transceiver may be dam-
aged.
RCAUTION! NEVER operate or touch the trans-
ceiver with wet hands. This may result in an electric
shock or damage to the transceiver.
RCAUTION! The transceiver weighs approx. 22.5
kg (50 lb). Always have two people available to carry,
lift or turn over the transceiver.
RCAUTION! The line-voltage receptacle must be
near the transceiver and must be easily accessible.
Avoid extension cords.
DO NOT use chemical agents such as benzine or al-
cohol when cleaning the IC-7700, as they can damage
the transceiver’s surfaces.
DO NOT push the PTT switch when you don’t actu-
ally desire to transmit.
AVOID using or storing the transceiver in areas with
temperatures below ±0°C (+32°F) or above +50°C
(+122°F).
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 may overheat
the transceiver.
Always place unit in a secure place to avoid inadver-
tent use by children.
BE CAREFUL! If you use a linear amplifier, set the
transceiver’s RF output power to less than the linear
amplifier’s maximum input level, otherwise, the linear
amplifier will be damaged.
Use Icom microphones only (supplied or optional).
Other manufacturers’ microphones have different pin
assignments, and connection to the IC-7700 may dam-
age the transceiver or microphone.
The LCD display may have cosmetic imperfections that
appear as small dark or light spots. This is not a mal-
function or defect, but a normal characteristic of LCD
displays.
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.
Turn [I/O] switch (on the rear panel) OFF and/or dis-
connect the AC power cable from the AC outlet when
you will not use the transceiver for long period of time.
For U.S.A. only
CAUTION: Changes or modifications to this device,
not expressly approved by Icom Inc., could void your
authority to operate this device under FCC regulations.

qAC power cable* ………………………………… 1
wFeet …………………………………………… 1 pair
eSpare fuse (FGB 2 A) …………………………… 1
rRCA plugs ………………………………………… 2
tDC plug …………………………………………… 1
y2-conductor 1⁄8″plugs …………………………… 3
u3-conductor 1⁄8″plugs …………………………… 2
i3-conductor 1⁄4″plugs …………………………… 3
oACC plugs (7-pin) ………………………………… 1
!0 ACC plugs (8-pin) ………………………………… 1
!1 Antenna connector caps ………………………… 4
!2 Side screws (without rack mounting handle)†…6
!3 Main dial‡…………………………………………… 1
!4 Rubber cover for Main dial‡……………………… 1
!5 Main dial screw‡…………………………………… 1
!6 Hexagonal wrench‡………………………………… 1
*May differ from that shown according to version.
† These screws are used when removing rack mounting han-
dles. See p.2-3 for rack mounting handle detachment de-
tails.
‡ See p.2-2 for main dial attachment details.
iii
SUPPLIED ACCESSORIES
q
!0 !1 !2
!3 !4 !5 !56
yui
o
ewr
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iv
Section 1 PANEL DESCRIPTION
■Front panel ……………………………………………………………… 1-2
■Rear panel ……………………………………………………………… 1-12
■LCD display …………………………………………………………… 1-14
■Screen menu arrangement …………………………………………… 1-16
Section 2 INSTALLATION AND CONNECTIONS
■Unpacking ……………………………………………………………… 2-2
■Main dial attachment …………………………………………………… 2-2
■Rack mounting handle detachment …………………………………… 2-3
■Selecting a location …………………………………………………… 2-3
■Grounding ……………………………………………………………… 2-4
■Antenna connection …………………………………………………… 2-4
■USB-Memory connection ……………………………………………… 2-4
■Required connections ………………………………………………… 2-5
DFront panel …………………………………………………………… 2-5
DRear panel …………………………………………………………… 2-5
■Advanced connections ………………………………………………… 2-6
DFront panel …………………………………………………………… 2-6
DRear panel—1 ……………………………………………………… 2-6
DRear panel—2 ……………………………………………………… 2-7
■Linear amplifier connections …………………………………………… 2-8
DConnecting the IC-PW1/EURO …………………………………… 2-8
DConnecting a non-Icom linear amplifier …………………………… 2-8
■Transverter jack information …………………………………………… 2-9
■FSK and AFSK (SSTV) connections ………………………………… 2-9
■Microphone connector information ………………………………… 2-10
■Microphones (options) ………………………………………………… 2-10
DSM-20 ……………………………………………………………… 2-10
DHM-36 ……………………………………………………………… 2-10
■Accessory connector information …………………………………… 2-11
Section 3 BASIC OPERATIONS
■When first applying power (CPU resetting) ………………………… 3-2
■Initial settings …………………………………………………………… 3-2
■Selecting VFO/memory mode ………………………………………… 3-3
■VFO selection …………………………………………………………… 3-3
DSelecting VFO-A/VFO-B …………………………………………… 3-3
DVFO equalization …………………………………………………… 3-3
■Selecting an operating band …………………………………………… 3-4
DUsing the band stacking registers ………………………………… 3-4
■Frequency setting ……………………………………………………… 3-5
DTuning with the main dial …………………………………………… 3-5
DDirect frequency entry with the keypad …………………………… 3-5
DQuick tuning step …………………………………………………… 3-6
DSelecting “kHz” step ………………………………………………… 3-6
D1⁄4tuning step function ……………………………………………… 3-6
DSelecting 1 Hz step ………………………………………………… 3-7
DAuto tuning step function …………………………………………… 3-7
DBand edge warning beep …………………………………………… 3-7
■Operating mode selection ……………………………………………… 3-8
■Volume setting ………………………………………………………… 3-9
■RF gain adjustment …………………………………………………… 3-9
■Squelch level adjustment ……………………………………………… 3-9
TABLE OF CONTENTS

■Meter indication selection …………………………………………… 3-10
DMulti-function digital meter ………………………………………… 3-10
DMeter type selection ……………………………………………… 3-11
■Voice synthesizer operation ………………………………………… 3-11
■Basic transmit operation ……………………………………………… 3-12
DTransmitting ………………………………………………………… 3-12
DMicrophone gain adjustment ……………………………………… 3-12
DDrive gain adjustment ……………………………………………… 3-13
Section 4 RECEIVE AND TRANSMIT
■Operating SSB ………………………………………………………… 4-2
DConvenient functions for receive ……………………………………4-2
DConvenient functions for transmit ……………………………………4-3
DAbout 5 MHz band operation (USA version only) …………………4-3
■Operating CW …………………………………………………………… 4-4
DConvenient functions for receive ……………………………………4-4
DConvenient functions for transmit ……………………………………4-5
DAbout CW reverse mode ……………………………………………4-5
DAbout CW pitch control ………………………………………………4-5
DCW side tone function ………………………………………………4-5
DAPF (Audio Peak Filter) operation …………………………………4-6
■Electronic keyer functions ……………………………………………… 4-7
DMemory keyer screen …………………………………………………4-8
DEditing a memory keyer ………………………………………………4-9
DContest number set mode …………………………………………4-10
DKeyer set mode ………………………………………………………4-11
■Operating RTTY (FSK) ……………………………………………… 4-13
DConvenient functions for receive …………………………………4-14
DAbout RTTY reverse mode …………………………………………4-14
DTwin peak filter ………………………………………………………4-14
DFunctions for the RTTY decoder indication ………………………4-15
DSetting the decoder threshold level ………………………………4-15
DRTTY memory transmission ………………………………………4-16
DAutomatic transmission/reception setting …………………………4-16
DEditing RTTY memory ………………………………………………4-17
DRTTY decode set mode ……………………………………………4-18
DData saving …………………………………………………………4-20
■Operating PSK ………………………………………………………… 4-21
DConvenient functions for receive …………………………………4-22
DAbout BPSK and QPSK modes ……………………………………4-22
DFunctions for the PSK decoder indication ………………………4-23
DSetting the decoder threshold level ………………………………4-23
DPSK memory transmission …………………………………………4-24
DAutomatic transmission/reception setting …………………………4-24
DEditing PSK memory ………………………………………………4-25
DPSK decode set mode ………………………………………………4-26
DData saving …………………………………………………………4-28
■Operating AM ………………………………………………………… 4-29
DConvenient functions for receive …………………………………4-29
DConvenient functions for transmit …………………………………4-30
■Operating FM ………………………………………………………… 4-31
DConvenient functions for receive …………………………………4-31
DConvenient functions for transmit …………………………………4-31
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TABLE OF CONTENTS

vi
■Repeater operation …………………………………………………… 4-32
DRepeater access tone frequency setting …………………………4-33
■Tone squelch operation ……………………………………………… 4-34
■Data mode (AFSK) operation ………………………………………… 4-35
Section 5 FUNCTIONS FOR RECEIVE
■Spectrum scope screen ……………………………………………… 5-2
DCenter mode ………………………………………………………… 5-2
DFixed mode …………………………………………………………… 5-3
DMini scope screen indication ……………………………………… 5-4
DScope set mode ……………………………………………………… 5-4
■Preamplifier ……………………………………………………………… 5-9
■Attenuator ……………………………………………………………… 5-9
■RIT function …………………………………………………………… 5-10
DRIT monitor function …………………………………………………5-10
■AGC function …………………………………………………………… 5-11
DSelecting the preset value …………………………………………5-11
DAdjusting the AGC time constant …………………………………5-11
DSetting the AGC time constant preset value ………………………5-11
■Twin PBT operation …………………………………………………… 5-12
■IF filter selection ……………………………………………………… 5-13
DIF filter selection …………………………………………………… 5-13
DFilter passband width setting (except FM mode) ……………… 5-13
DRoofing filter selection ……………………………………………… 5-14
DDSP filter shape …………………………………………………… 5-14
DFilter shape set mode ……………………………………………… 5-14
■Noise blanker ………………………………………………………… 5-16
DNB set mode ………………………………………………………… 5-16
■Noise reduction ………………………………………………………… 5-17
■Dial lock function ……………………………………………………… 5-17
■Notch function ………………………………………………………… 5-18
■Digital selector ………………………………………………………… 5-18
■Autotune function ……………………………………………………… 5-19
Section 6 FUNCTIONS FOR TRANSMIT
■VOX function …………………………………………………………… 6-2
DUsing the VOX function …………………………………………… 6-2
DAdjusting the VOX function ………………………………………… 6-2
DVOX set mode ……………………………………………………… 6-2
■Break-in function ………………………………………………………… 6-3
DSemi break-in operation …………………………………………… 6-3
DFull break-in operation ……………………………………………… 6-3
■∂TX function …………………………………………………………… 6-4
D∂TX monitor function ………………………………………………… 6-4
■Monitor function ………………………………………………………… 6-4
■Transmit filter width setting (SSB only) ……………………………… 6-5
■Speech compressor (SSB only) ……………………………………… 6-5
■Split frequency operation ……………………………………………… 6-6
■Quick split function ……………………………………………………… 6-7
DSplit lock function …………………………………………………… 6-7
TABLE OF CONTENTS

Section 7 VOICE RECORDER FUNCTIONS
■About digital voice recorder …………………………………………… 7-2
■Recording a received audio …………………………………………… 7-3
DBasic recording ……………………………………………………… 7-3
DOne-touch recording ………………………………………………… 7-3
■Playing the recorded audio …………………………………………… 7-4
DBasic playing ………………………………………………………… 7-4
DOne-touch playing …………………………………………………… 7-4
■Protect the recorded contents ………………………………………… 7-5
■Erasing the recorded contents ………………………………………… 7-5
■Recording a message for transmit …………………………………… 7-6
DRecording …………………………………………………………… 7-6
DConfirming a message for transmit ………………………………… 7-6
■Programming a memory name ……………………………………… 7-7
■Sending a recorded message ………………………………………… 7-8
DTransmit level setting ……………………………………………… 7-8
■Voice set mode ………………………………………………………… 7-9
■Saving a voice memory into the USB-Memory …………………… 7-10
DSaving the received audio memory ……………………………… 7-10
DSaving the TX memory …………………………………………… 7-10
Section 8 MEMORY OPERATION
■Memory channels ……………………………………………………… 8-2
■Memory channel selection …………………………………………… 8-2
DUsing the / keys ………………………………………… 8-2
DUsing the keypad …………………………………………………… 8-2
■Memory channel programming ……………………………………… 8-3
DProgramming in VFO mode ………………………………………… 8-3
DProgramming in memory mode …………………………………… 8-3
■Frequency transfers …………………………………………………… 8-4
DTransferring in VFO mode ………………………………………… 8-4
DTransferring in memory mode ……………………………………… 8-4
■Memory list screen ……………………………………………………… 8-5
DSelecting a memory channel using the memory list screen …… 8-5
DConfirming programmed memory channels ……………………… 8-5
■Memory names ………………………………………………………… 8-6
DEditing (programming) memory names …………………………… 8-6
■Memory clearing ………………………………………………………… 8-6
■Memo pads ……………………………………………………………… 8-7
DWriting frequencies and operating modes into memo pads …… 8-7
DCalling up a frequency from a memo pad ………………………… 8-7
Section 9 SCANS
■Scan types ……………………………………………………………… 9-2
■Preparation ……………………………………………………………… 9-2
■Voice squelch control function ………………………………………… 9-3
■Scan set mode ………………………………………………………… 9-3
■Programmed scan operation ………………………………………… 9-4
■∂F scan operation ……………………………………………………… 9-4
■Fine programmed scan/Fine ∂F scan ……………………………… 9-5
■Memory scan operation ………………………………………………… 9-6
■Select memory scan operation ……………………………………… 9-6
√
∫
vii
TABLE OF CONTENTS

viii
■Setting select memory channels ……………………………………… 9-7
DSetting in scan screen ……………………………………………… 9-7
DSetting in memory list screen ……………………………………… 9-7
DErasing the select scan setting …………………………………… 9-7
■Tone scan ……………………………………………………………… 9-8
Section 10 ANTENNATUNER OPERATION
■Antenna connection and selection ………………………………… 10-2
■Antenna memory settings …………………………………………… 10-3
DAntenna type selection …………………………………………… 10-3
DTemporary memory ………………………………………………… 10-4
DAntenna selection mode …………………………………………… 10-4
DReceive antenna I/O setting ……………………………………… 10-5
■Antenna tuner operation ……………………………………………… 10-6
DTuner operation …………………………………………………… 10-6
DIf the tuner cannot tune the antenna …………………………… 10-7
Section 11 CLOCK AND TIMERS
■Time set mode ………………………………………………………… 11-2
■Daily timer setting ……………………………………………………… 11-3
■Setting sleep timer …………………………………………………… 11-4
■Timer operation ………………………………………………………… 11-4
Section 12 SET MODE
■Set mode description ………………………………………………… 12-2
DSet mode operation ………………………………………………… 12-2
DScreen arrangement ……………………………………………… 12-3
■Level set mode ………………………………………………………… 12-4
■ACC set mode ………………………………………………………… 12-7
■Display set mode ……………………………………………………… 12-9
■Others set mode …………………………………………………… 12-12
■USB-Memory set menu …………………………………………… 12-19
DUSB-Memory set screen arrangement ………………………… 12-19
DSave option set mode …………………………………………… 12-20
DLoad option set mode …………………………………………… 12-21
■File saving …………………………………………………………… 12-22
■File loading …………………………………………………………… 12-23
■Changing a file name ……………………………………………… 12-24
■Deleting a file ………………………………………………………… 12-25
■Unmounting USB-Memory ………………………………………… 12-25
■Formatting the USB-Memory ……………………………………… 12-26
Section 13 MAINTENANCE
■Troubleshooting ……………………………………………………… 13-2
DTransceiver power ………………………………………………… 13-2
DTransmit and receive ……………………………………………… 13-2
DScanning …………………………………………………………… 13-3
DDisplay ……………………………………………………………… 13-3
DFormat USB-Memory ……………………………………………… 13-3
■Main dial brake adjustment ………………………………………… 13-3
■SWR reading …………………………………………………………… 13-4
■Screen type and font selections …………………………………… 13-4
■Frequency calibration (approximate) ……………………………… 13-5
■Opening the transceiver’s case ……………………………………… 13-6
■Clock backup battery replacement ………………………………… 13-6
TABLE OF CONTENTS

■Fuse replacement …………………………………………………… 13-7
■Resetting the CPU …………………………………………………… 13-7
■About protection indications ………………………………………… 13-8
■Screen saver function ………………………………………………… 13-8
Section 14 CONTROL COMMAND
■Remote jack (CI-V) information ……………………………………… 14-2
DCI-V connection example ………………………………………… 14-2
DData format ………………………………………………………… 14-2
DCommand table …………………………………………………… 14-3
DTo send/read memory contents …………………………………… 14-9
DBand stacking register …………………………………………… 14-9
DCodes for memory keyer contents ……………………………… 14-9
DCodes for memory name, opening message
and CLOCK2 name contents ……………………………………… 14-9
DOffset frequency setting ………………………………………… 14-10
DRepeater tone/tone squelch frequency setting ………………… 14-10
DSSB transmission passband width setting …………………… 14-10
DColor setting ……………………………………………………… 14-10
DBandscope edge frequency setting …………………………… 14-10
DData mode with filter width setting ……………………………… 14-10
DAntenna memory setting ………………………………………… 14-10
Section 15 SPECIFICATIONS AND OPTIONS
■Specifications ………………………………………………………… 15-2
DGeneral ……………………………………………………………… 15-2
DTransmitter ………………………………………………………… 15-2
DReceiver …………………………………………………………… 15-3
DAntenna tuner ……………………………………………………… 15-3
■Options ………………………………………………………………… 15-4
Section 16 UPDATING THE FIRMWARE
■General ………………………………………………………………… 16-2
■Caution ………………………………………………………………… 16-2
■Preparation …………………………………………………………… 16-3
DFirmware and firm utility …………………………………………… 16-3
DFile downloading …………………………………………………… 16-3
■Firmware update— USB-Memory …………………………………… 16-4
■Firmware update— PC ……………………………………………… 16-6
DConnections ………………………………………………………… 16-6
DIP address setting ………………………………………………… 16-7
DUpdating from a PC ………………………………………………… 16-8
ix
TABLE OF CONTENTS

1-1
PANEL DESCRIPTION Section 1
■Front panel ……………………………………………………………… 1-2
■Rear panel ……………………………………………………………… 1-12
■LCD display …………………………………………………………… 1-14
■Screen menu arrangement …………………………………………… 1-16

1-2
qPOWER SWITCH (p. 3-2)
➥Push to turn the transceiver power ON.
•The [POWER] indicator above this switch lights green
when powered ON.
➥Push and hold for 1 sec. to turn the transceiver
power OFF.
•The [POWER] indicator lights orange when the trans-
ceiver is OFF when the internal power supply is
switched ON.
wTRANSMIT SWITCH
Selects transmit or receive.
•The [TX] indicator lights red while transmitting and the
[RX] indicator lights green when the squelch is open.
eANTENNA TUNER SWITCH (p. 10-6)
➥Turns the internal antenna tuner ON and OFF
(bypass) when pushed momentarily.
•The [TUNER] indicator above this switch lights green
when the tuner is turned ON, goes off when tuner is
turned OFF (bypassed).
➥Tunes the antenna tuner manually when pushed
and held for 1 sec.
•The [TUNER] indicator blinks red during manual tun-
ing.
•When the tuner cannot tune the antenna, the tuning
circuit is bypassed automatically after 20 sec.
rTIMER SWITCH (p. 11-4)
➥Turns the sleep or daily timer function ON and
OFF.
•The [TIMER] indicator above this switch lights green
when the timer is in use.
➥Enters timer set mode when pushed and held for
1 sec.
tHEADPHONE JACK [PHONES]
Accepts standard stereo headphones.
•Output power: 5 mW with an 8 Ωload.
•When headphones are connected, the internal speaker
or connected external speaker does not function.
yELECTRONIC KEYER JACK [ELEC-KEY] (p. 2-5)
Accepts a paddle to activate the internal electronic
keyer for CW operation.
•You can select internal electronic keyer, bug-key or
straight key operation in keyer set mode. (p. 4-12)
•Astraight key jack is located on the rear panel. See [CW
KEY] on p. 1-12.
•Keyer polarity (dot and dash) can be reversed in keyer
set mode. (p. 4-12)
•A4-channel memory keyer is available for your conve-
nience. (p. 4-8)
TIMER
TUNER
TRANSMIT
POWER
(dot)
(com)
(dash)
Turn the internal power supply ON in first. The in-
ternal power supply switch is located on the rear
panel. (p. 3-2)
1PANEL DESCRIPTION
POWER
TUNER
TIMER
VOX
SSB CW RTTY/PSK AM/FM DATA AUTO
TUNE
XFC
M.SCOPE EXIT/SET
REC
PLAY
VOICE MEMORYBRIGHTCONTRASTVOX GAINMONI GAINCOMPDRIVE ANTI VOX
BK-IN MONITOR
TRANSMIT
MIC
ELEC-KEY
PHONES
AF RF
MIC RF PWR KEY SPEED DELAY
F-1 F-2 F-3 F-4 F-5 F-6 F-7
LOCKTX RX SPLIT
AGC VR NR
1
1.8 3.5
4
10 14
7
21 24
MP
M
A
GENE 50
NB
AGC SQL NR NB
q
w
e
r
t
y
u
!5
io!0 !1 !2 !3 !4
!6
■Front panel

1-3
uMICROPHONE CONNECTOR [MIC]
Accepts an optional microphone.
•See p. 15-4 for appropriate microphones.
•See p. 2-10 for microphone connector information.
iMIC GAIN CONTROL [MIC] (p. 3-12)
Adjusts microphone input gain.
•The transmit audio tone in SSB,AM and FM modes can
be adjusted independently in set mode. (p. 12-5)
✔ How to set the microphone gain.
Set the [MIC] control so that the ALC meter occasionally
moves up-scale during normal voice transmission in SSB,
AM or FM mode.
oVOX SWITCH
➥Push to turn the VOX function ON and OFF dur-
ing SSB, AM and FM mode operation. (p. 6-2)
➥Push and hold for 1 sec. to enter VOX set mode.
(p. 6-2)
✔ What is the VOX function?
The VOX function (voice operated transmission) activates
transmission without pushing the transmit switch or PTT
switch when you speak into the microphone; then auto-
matically returns to receive when you stop speaking.
!0 RF POWER CONTROL [RF PWR] (p. 3-12)
Continuously varies the RF output power from min-
imum (5 W*) to maximum (200 W*).
*AM mode: 5 W to 50 W
!1 BREAK-IN SWITCH
Push to turn the break-in function ON (semi-break-in,
full-break-in) and OFF during CW mode operation.
(p. 6-3)
✔ What is the break-in function?
The break-in function switches transmit and receive with
CW keying. Full break-in (QSK) can monitor the receive
signal between CW dots and dashes.
!2 ELECTRONIC CW KEYER SPEED CONTROL
[KEY SPEED] (p. 4-4)
Adjusts keying speed for the internal electronic CW
keyer.
•6wpm (min.) to 48 wpm (max.) is the available range.
!3 MONITOR SWITCH (p. 6-4)
Monitors your transmitted IF signal.
•The CW sidetone functions regardless of
switch setting in CW mode.
•The [MONITOR] indicator above this switch lights green
while the function is activated.
!4 BREAK-IN DELAY CONTROL [DELAY] (p. 6-3)
Adjusts the transmit-to-receive switching delay time
for CW semi-break-in operations.
!5 AGC CONTROL [AGC] (p. 5-11)
Adjusts the continuously-variable AGC circuit time
constant.
•To use [AGC] control, push ([AGC VR] indi-
cator lights).
!6 SQUELCH CONTROL [SQL]
(outer control; p. 3-9)
Adjusts the squelch threshold level. The squelch
mutes noise output from the speaker (closed condi-
tion) when no signal is received.
•The squelch is particularly effective for FM. It is also
available in other modes.
•The 11 to 12 o’clock position is recommended for the
most effective use of the [SQL] control.
AGC VR
MONITOR
MONITOR
BK-IN
VOX
Deep
Deep
Noise squelch
Squelch
threshold
Shallow
Shallow
S-meter
squelch
Squelch is
open
Slow
Fast
Long delay for
slow speed keying
Short delay for
high speed keying
Max.
48 wpm
Min.
6 wpm
Increases
Decreases
Recommended level for
an Icom microphone
Decreases
Decreases Increases
Increases
1
PANEL DESCRIPTION

1-4
!7 NOISE REDUCTION LEVEL CONTROL [NR]
(inner control; p. 5-17)
Adjusts the DSP noise reduction level when the
noise reduction function is in use. Set for maximum
readability.
•To use this control, push .
!8 NOISE BLANKER CONTROL [NB]
(outer control; p. 5-16)
Adjust the noise blanker threshold level.
•To use this control, push .
!9 AGC VOLUME SWITCH (p. 5-11)
➥Push to toggle [AGC] control usage ON and OFF.
•Use [AGC] control to set theAGC time constant when
switched ON.
•The [AGC VR] indicator above this switch lights
green when the control is ON.
➥Turns the AGC function OFF when pushed and
held for 1 sec.
@0 USB (Universal Serial Bus) CONNECTOR [USB]
(p. 2-4)
➥Insert USB-Memory* for both reading/storing a
wide variety of the transceiver’s information and
data.
•The indicator above the connectors lights or blinks
when the transceiver reads or writes to the memory
data.
•Unmount operation should be performed before re-
moving the USB-Memory* (p.12-25).
➥Connects a PC keyboard for RTTY and PSK31
operations.
•USB keyboards* are supported.
*: USB-Memory or USB keyboard is not supplied by
Icom.
@1 NOISE REDUCTION SWITCH (p. 5-17)
Push to switch DSP noise reduction ON and OFF.
•The [NR] indicator above this switch lights green when
the function is activated.
@2 AF CONTROL [AF] (inner control; p. 3-9)
Varies the audio output level of the speaker or
headphones.
NR
AGC VR
NB
NR
Audio output
increases
Audio output
decreases
Deep
Shallow
Increases
Decreases
1PANEL DESCRIPTION
POWER
TUNER
TIMER
VOX
SSB CW RTTY/PSK AM/FM DATA AUTO
TUNE
XFC
M.SCOPE EXIT/SET
REC
PLAY
VOICE MEMORYBRIGHTCONTRASTVOX GAINMONI GAINCOMPDRIVE ANTI VOX
BK-IN MONITOR
TRANSMIT
MIC
ELEC-KEY
PHONES
AF RF
MIC RF PWR KEY SPEED DELAY
F-1 F-2 F-3 F-4 F-5 F-6 F-7
LOCKTX RX SPLIT
AGC VR NR
1
1.8 3.5
4
10 14
7
21 24
MP
M
A
GENE 50
NB
i7700
HF/50MHz TRANSCEIVER
AGC SQL NR NB
!7
!8
!9 @2 @3 @5 #2@6 @7 @8 @9 #0 #1@4@0 @1
■Front panel (continued)

1-5
@3 RF GAIN CONTROL [RF] (outer control; p. 3-9)
Adjusts the RF gain level.
While rotating the RF gain control, you may hear
noise. This comes from the DSP unit and does
not indicate a malfunction.
@4 NOISE BLANKER SWITCH (p. 5-16)
➥Switches the noise blanker ON and OFF when
pushed. The noise blanker reduces pulse-type
noise such as that generated by automobile igni-
tion systems. This function cannot be used in FM
mode, or on non-pulse-type noise.
•The [NB] indicator above this switch lights green
while the function is activated.
➥Enters blanking-width set mode when pushed
and held for 1 sec.
@5 DRIVE GAIN CONTROL [DRIVE] (p. 3-13)
Adjusts the transmitter level at the driver stage. Ac-
tive in all modes (other than SSB mode with [COMP]
OFF).
@6 COMPRESSION LEVEL CONTROL [COMP]
(p. 6-5)
Adjusts the speech compression level in SSB.
@7 MONITOR GAIN CONTROL [MONI GAIN] (p. 6-4)
Adjusts the transmit IF signal monitor level.
@8 VOX GAIN CONTROL [VOX GAIN] (p. 6-2)
Adjusts the transmit/receive switching threshold
level for VOX operation.
@9 ANTI VOX CONTROL [ANTI VOX] (p. 6-2)
Adjusts the VOX sensitivity to speaker audio to pre-
vent unwanted VOX activation.
#0 LCD CONTRAST CONTROL [CONTRAST]
Adjusts the LCD contrast.
#1 LCD BRIGHTNESS CONTROL [BRIGHT]
Adjusts the LCD brightness.
#2 AUTOMATIC TUNING SWITCH [AUTOTUNE]
(p. 5-19)
Turns the automatic tuning function ON and OFF in
CW and AM modes.
NB
IMPORTANT!
When receiving a weak signal, or receiving a sig-
nal with interference, the automatic tuning func-
tion may tune the receiver to an undesired signal.
Dark
Bright
Push
Low
contrast
High
contrast
Push
‘More sensitive’
and confirm proper operation
‘Less sensitive’
and confirm
proper operation
Push
Low
sensitivity
High
sensitivity
Push
Monitor gain
decreases
Monitor gain
increases
Push
Compression
gain decreases
Compression
gain increases
Push
Decreases
Increases
Push
Sensitivity
increases
Sensitivity
decreases
1
PANEL DESCRIPTION

1-6
#3 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.
MF1 (MULTI-FUNCTION 1 SWITCH)
➥Selects the antenna connector from
ANT1, ANT2, ANT3 and ANT4 when
pushed. (p. 10-2)
➥Displays antenna selection memory
when pushed and held for 1 sec.
•When the receive antenna is activated,
the antenna connected to [ANT4] is used
for receive only.
When a transverter is in use, this [ANT]
does not function and ‘TRV’ appears.
MF2 (MULTI-FUNCTION 2 SWITCH)
➥Selects RF power (Po), SWR, ALC,
COMP, VDor IDmetering during trans-
mit. (p. 3-10)
➥Switches the multi-function digital
meter ON and OFF when pushed and
held for 1 sec. (p. 3-10)
MF3 (MULTI-FUNCTION 3 SWITCH)
➥Selects one of 2 receive RF preamps
or bypasses them. (p. 5-9)
•“P. AMP1” activates 10 dB preamp.
•“P. AMP2” activates 16 dB high-gain pre-
amp.
➥Turns the preamp function OFF when
pushed and held for 1 sec. (p. 5-9)
✔ What is the preamp?
The preamp amplifies signals in the receiver front end to
improve S/N ratio and sensitivity. Select “P. AMP1” or “P.
AMP2” when receiving weak signals.
MF4 (MULTI-FUNCTION 4 SWITCH)
➥Selects 6 dB, 12 dB or 18 dB attenua-
tor when pushed. (p. 5-9)
➥Turns the attenuator function OFF
when pushed and held for 1 sec.
(p. 5-9)
✔ What is the attenuator?
The attenuator prevents a desired signal from being dis-
torted when very strong signals are near the desired fre-
quency, or when very strong electromagnetic fields, such
as from a broadcasting station, are near your location.
ATT
OFF
P.AMP
1
METER
Po
ANT
1
1PANEL DESCRIPTION
SSB CW RTTY/PSK AM/FM DATA AUTO
TUNE
LOCK
TS
XFC
M.SCOPE EXIT/SET
REC
PLAY
VOICE MEMORYBRIGHTCONTRASTVOX GAINMONI GAINCOMPDRIVE ANTI VOX
MONITOR
RF
DIGI-SEL NOTCH
RIT/∂TX
CW PITCH
TWIN-PBT
D DELAY
F-1 F-2 F-3 F-4 F-5 F-6 F-7
LOCKTX RX SPLIT
FILTER
PBT-CLR
DIGI-SEL
APF/TPF
NOTCH
RIT
CLEAR
SPEECH
1
1.8
2
3.5
3
7
4
10
5
14
6
18
7
21
8
24
MP-W MP-R
MW V/M
A/B A=B
9
28
GENE
0
50
ENT
F-INP
∂TX
NB
SPLIT
7700
NSCEIVER
NB
#3 #4 #5 #6 #8#7 #9 $0 $1 $2
■Front panel (continued)

1-7
MF5 (MULTI-FUNCTION 5 SWITCH)
➥Activates and selects fast, mid-range
or slow AGC time constant when
pushed. (p. 5-11)
•In FM mode, only “FAST” is available.
➥Enters the AGC set mode when
pushed and held for 1 sec. (p. 5-11)
AGC time constant can be set between
0.1 to 8.0 sec. (depends on mode), or
turned OFF. When AGC is “OFF,” the
S-meter does not function.
✔ What is the AGC?
The AGC controls receiver gain to produce a constant
audio output level, even when the received signal
strength varies dramatically. Select “FAST” for tuning and
then select “MID” or “SLOW” depending on the receiving
condition.
MF6 (MULTI-FUNCTION 6 SWITCH)
➥Turns the speech compressor ON and
OFF in SSB mode. (p. 6-5)
➥Switches the narrow, middle or wide
compression when pushed and held
for 1 sec.
✔ What is the speech compressor?
The speech compressor compresses the transmitter
audio input to increase the average audio output level, to
increase talk power. This function is effective for long-dis-
tance communication or when propagation conditions are
poor.
➥Turns the 1⁄4-speed tuning function ON
and OFF in SSB data, CW, RTTY and
PSK modes. (p. 3-6)
•1⁄4function sets dial rotation to 1⁄4of nor-
mal speed for fine tuning.
➥Switches between the tone encoder,
tone squelch function and no-tone op-
eration when pushed in FM mode.
(pgs. 4-33, 4-34)
➥Enters the tone set mode when
pushed and held for 1 sec. in FM
mode. (pgs. 4-33, 4-34)
MF7 (MULTI-FUNCTION 7 SWITCH)
➥Switches the voice squelch control
function ON and OFF; useful for scan-
ning. (p. 9-3)
#4 LCD FUNCTION SWITCHES –
Push to select the function indicated in the LCD dis-
play above these switches.
•Functions vary depending on the operating condition.
#5 TRANSMIT INDICATOR [TX]
Lights red while transmitting.
#6 RECEIVE INDICATOR [RX]
Lights green while receiving a signal and when the
squelch is open.
#7 LCD FUNCTION DISPLAY (p. 1-14)
Shows the operating frequency, function switch
menus, spectrum scope screen, memory list
screen, set mode settings, etc.
#8 SPLIT OPERATION INDICATOR [SPLIT]
Lights during split frequency operation.
#9 LOCK INDICATOR [LOCK] (p. 5-17)
Lights when the dial lock function is activated.
$0 TRANSMIT FREQUENCY CHECK SWITCH
[XFC] (p. 6-6)
Monitors the transmit frequency (including ∂TX fre-
quency offset) when pushed and held during split fre-
quency operation.
•While pushing this switch, the transmit frequency can be
changed with the main dial, keypad, memo pad or
/ switches.
•When the split lock function is turned ON, pushing [XFC]
cancels the dial lock function. (p. 6-7)
$1 MEMORY UP/DOWN SWITCHES /
(p. 8-2)
Push to select the desired memory channel.
•Memory channels can be selected both in VFO and
memory modes.
$2 KEYPAD
➥Pushing a key selects the operating band. (p. 3-4)
•selects the general coverage band.
➥Pushing the same key 2 or 3 times calls up other
stacked frequencies in the band. (p. 3-4)
•Icom’s triple band stacking register memorizes 3 fre-
quencies in each band.
➥After pushing , enters a frequency or
memory channel. Pushing or /
is necessary to end the entry. (pgs. 3-5,
8-2)
•e.g. to enter 14.195 MHz, push .
F-INPENT
14 5 28 9 1.8 1
GENE •
10 4
1.8 1
F-INPENT
√
∫
F-INPENT
F-INPENT
GENE •
√
∫
√
∫
F-7F-1
VSC
OFF
TONE
OFF
1 / 4
ON
COMP
OFF
WIDE
AGC
MID
1
PANEL DESCRIPTION

1-8
$3 MODE SWITCHES
Selects the desired mode. (p. 3-8)
•Announces selected mode via the speech synthesizer.
(p. 12-15)
Selects USB and LSB modes alter-
nately.
Selects CW and CW-R (CW reverse)
modes alternately.
➥Switches between RTTY and PSK
mode.
➥Switches RTTY and RTTY-R (RTTY
reverse) mode when pushed and held
for 1 sec. in RTTY mode.
➥Switches PSK and PSK-R (PSK re-
verse) mode when pushed and held
for 1 sec. in PSK mode.
Selects AM and FM modes alternately.
➥Selects SSB, AM or FM data mode
(USB-D, LSB-D, AM-D, FM-D) when
pushed in SSB, AM or FM mode, re-
spectively.
➥Switches D1, D2 and D3 when
pushed and held for 1 sec.
$4 QUICK TUNING SWITCH [TS]
➥Turns the quick tuning step ON and OFF.
(p. 3-6)
•While the quick tuning indicator, “Z,” is displayed
above the frequency indication, the frequency can be
changed in programmed kHz steps.
•0.1, 1, 5, 9, 10, 12.5, 20 and 25 kHz steps are avail-
able for each operating mode independently.
➥When the quick tuning step is OFF, push and
hold for 1 sec. to turn the 1 Hz tuning step ON
and OFF. (p. 3-7)
➥When the quick tuning step is ON, push and hold
for 1 sec. to enter quick tuning step set mode.
(p. 3-6)
$5 VFO SELECT SWITCH
Switches the selected VFO between the VFO-Aand
VFO-B when pushed.
•Switches between transmit frequency and receive fre-
quency when the split frequency function is ON. (p. 6-6)
$6 MEMORY WRITE SWITCH (p. 8-3)
Stores the selected readout frequency and operat-
ing mode into the displayed memory channel when
pushed and held for 1 sec.
•This function is available both in VFO and memory
modes.
MW
A/B
DATA
AM/FM
RTTY/PSK
CW
SSB
1PANEL DESCRIPTION
SSB CW RTTY/PSK AM/FM DATA AUTO
TUNE
LOCK
TS
XFC
M.SCOPE EXIT/SET
REC
PLAY
VOICE MEMORYBRIGHTCONTRASTVOX GAINMONI GAINCOMPDRIVE ANTI VOX
MONITOR
RF
DIGI-SEL NOTCH
RIT/∂TX
CW PITCH
TWIN-PBT
D DELAY
F-1 F-2 F-3 F-4 F-5 F-6 F-7
LOCKTX RX SPLIT
FILTER
PBT-CLR
DIGI-SEL
APF/TPF
NOTCH
RIT
CLEAR
SPEECH
1
1.8
2
3.5
3
7
4
10
5
14
6
18
7
21
8
24
MP-W MP-R
MW V/M
A/B A=B
9
28
GENE
0
50
ENT
F-INP
∂TX
NB
SPLIT
7700
NSCEIVER
NB
$5 $7 $8 $9 %0 %2$6
%8 %9%7 ^0
$4 %1
%4 %5
$3
%6%3
■Front panel (continued)

1-9
$7 MEMO PAD-WRITE SWITCH (p. 8-7)
Programs the displayed readout frequency and op-
erating mode into a memo pad.
•The 5 most recent entries remain in memo pads.
•The memo pad capacity can be expanded from 5 to 10
in set mode. (p. 12-15)
$8 MEMO PAD-READ SWITCH (p. 8-7)
Each push calls up a frequency and operating mode
in a memo pad. The 5 (or 10) most recently pro-
grammed frequencies and operating modes can be
recalled, starting from the most recent.
•The memo pad capacity can be expanded from 5 to 10
in set mode. (p. 12-15)
$9 VFO/MEMORY SWITCH
➥Switches the selected readout operating mode
between the VFO and memory when pushed.
(pgs. 3-3, 8-2)
➥Transfers the memory contents to VFO when
pushed and held for 1 sec. (p. 8-4)
%0 VFO EQUALIZING SWITCH (p. 3-3)
Transfers the undisplayed VFO frequency to the
displayed VFO frequency when pushed and held for
1 sec.
%1 FILTER SWITCH (p. 5-13)
➥Selects one of 3 IF filter settings.
➥Enters the filter set screen when pushed and
held for 1 sec.
%2 AUDIO PEAK FILTER/TWIN PEAK FILTER
SWITCH
During CW mode operation (p. 4-6)
➥Push to turn the audio peak filter ON and OFF.
•“ ” appears when audio peak filter is in use.
➥Push and hold for 1 sec. to select the APF pass-
band width from WIDE, MID and NAR or from
320, 160 and 80 Hz depending on APF type set-
ting.
During RTTY mode operation (p. 4-14)
➥Push to turn the twin peak filter ON and OFF.
•“ ” appears when twin peak filter is in use.
%3 MINI SPECTRUM SCOPE SWITCH
(p. 5-4)
➥Turns the mini spectrum scope screen ON and
OFF when pushed.
•The mini spectrum scope screen can be displayed
with another screen, such as memory or set mode
screen, simultaneously.
➥Turns the spectrum scope screen ON when
pushed and held for 1 sec.
%4 VOICE MEMORY RECORD SWITCH
(p. 7-3)
➥Push to record the previous received signal for
the preset time period.
•The preset time period can be set in voice set mode.
(p. 7-9)
➥Push and hold for 1 sec. to record the received
signal until the recording is cancelled.
•Push this switch momentarily to stop recording.
•The memory records the latest 30 sec. of audio.
%5 VOICE MEMORY PLAYBACK SWITCH
(p. 7-4)
➥Plays back the previously recorded audio for the
preset time period when pushed.
➥Plays back all of the previously recorded audio
when pushed and held for 1 sec.
%6 EXIT/SET SWITCH
➥Push to exit, or return to the previous screen in-
dication during spectrum scope, memory, scan or
set mode screen display.
➥Displays set mode menu screen when pushed
and held for 1 sec.
%7 MAIN DIAL
Changes the displayed frequency, selects set mode
setting, etc.
%8 LOCK SWITCH [LOCK] (p. 5-17)
Push to switch the dial lock function ON and OFF.
%9 SPEECH SWITCH (p. 3-11)
➥Push to announce the S-meter indication and the
selected frequency.
➥The selected operating mode is additionally an-
nounced when pushed and held for 1 sec.
^0 SPLIT SWITCH (p. 6-6)
➥Turns the split function ON and OFF when
pushed.
➥Turns the split function ON. When pushed and
held for 1 sec. in non-FM modes, transfers the
unselected VFO’s readout frequency to the se-
lected VFO’s readout and sets the unselected
VFO to transmit VFO. (Quick split function)
•The offset frequency is shifted from the selected VFO
frequency in FM mode. (p. 12-13)
•The quick split function can be turned OFF using set
mode. (p. 12-12)
➥Turns the split function ON and shifts the unse-
lected VFO frequency after inputting an offset.
SPLIT
SPEECH
EXIT/SET
PLAY
REC
M.SCOPE
TPF
APF
APF/TPF
FILTER
A=B
V/M
MP-R
MP-W
1
PANEL DESCRIPTION

1-10
^1 PASSBAND TUNING CONTROLS [TWIN-PBT]
(p. 5-12)
Adjusts the receiver’s IF filter “passband width” via
the DSP.
•Passband width and shift frequency are displayed in the
multi-function display.
•Push and hold for 1 sec. to clear the PBT
settings.
•Adjustment range is set to half of the IF filter passband
width. 25 Hz steps and 100 Hz steps are available.
✔ What is the PBT control?
The PBT function electronically modifies the IF passband
width to reject interference. This transceiver uses the
DSP circuit for the PBT function.
^2 PBT CLEAR SWITCH (p. 5-12)
Clears the PBT settings when pushed and held for
1sec.
•The [PBT-CLR] indicator above this switch lights when
PBT is in use.
^3 DIGITAL RF SELECTOR SWITCH
(p. 5-18)
Turns the digital RF selector ON and OFF.
•The [DIGI-SEL] indicator lights green when the prese-
lector is in use.
^4 DIGITAL RF SELECTOR CONTROL [DIGI-SEL]
(p. 5-18)
Adjusts the digital RF selector center frequency.
•The control can be reassigned as the audio peak filter
adjustment (p. 12-16)
DIGI-SEL
PBT-CLR
PBT-CLR
Higher
frequency
Lower
frequency
PBT2
PBT1
Low cutHigh cut Center
–+
1PANEL DESCRIPTION
SSB CW RTTY/PSK AM/FM DATA AUTO
TUNE
LOCK
TS
XFC
M.SCOPE EXIT/SET
REC
PLAY
VOICE MEMORYBRIGHTCONTRASTVOX GAINMONI GAINCOMPDRIVE ANTI VOX
DIGI-SEL NOTCH
RIT/∂TX
CW PITCH
TWIN-PBT
F-1 F-2 F-3 F-4 F-5 F-6 F-7
LOCKTX RX SPLIT
FILTER
PBT-CLR
DIGI-SEL
APF/TPF
NOTCH
RIT
CLEAR
SPEECH
1
1.8
2
3.5
3
7
4
10
5
14
6
18
7
21
8
24
MP-W MP-R
MW V/M
A/B A=B
9
28
GENE
0
50
ENT
F-INP
∂TX
SPLIT
&1 &0 ^9
^1
^2
^3
^4
^5
^6
^7
^8
■Front panel (continued)