Icom Ic-7800 User manual

THE TRANSCEIVER

i7800

Instruction Manual

A-6328H-1EX-o

Printed in Japan

i

FOREWORD

Congratulations! You are the owner of the world’s most advanced amateur

HF/50 MHz transceiver— IC-7800. The IC-7800 is designed and built with

Icom’s superior technology and craftsmanship. With proper care, this prod-

uct should provide you with years of trouble-free operation.

We would like to take a few moments of your time to thank you for making

the IC-7800 your radio of choice, and hope you agree with Icom’s philos-

ophy of “technology first.” Many hours of research and development went

into the design of your IC-7800.

DFEATURES

❍Ultimate receiver performance: third-order intercept (IP3) of

+40 dBm (HF bands only), both main and sub

❍Independent identical receiver circuits for main and sub

bands provide perfect no-compromise Dualwatch operation

❍Built-in Baudot RTTY and PSK31 modulator/demodulator

and direct PC keyboard connection capability for RTTY and

PSK31 operation without a PC

❍Upgraded real-time spectrum scope— center frequency and

fix 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-7800.

EXPLICIT DEFINITIONS

TRADEMARKS

Icom, Icom Inc. and the Icom logo are registered trademarks of Icom In-

corporated (Japan) in Japan, the United States, the United Kingdom, Ger-

many, France, Spain, Russia and/or other countries.

WORD DEFINITION

RWARNING Personal injury, fire hazard or electric shock may

occur.

CAUTION Equipment damage may occur.

NOTE If disregarded, inconvenience only. No risk of personal

injury, fire or electric shock.

ii

PRECAUTIONS

RWARNING HIGH RF VOLTAGE! NEVER

attach an antenna or internal antenna connector dur-

ing 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.

CAUTION NEVER put the transceiver in any un-

stable place (such as on a slanted surface or vibrated

place). This may cause injury and/or damage to the

transceiver.

CAUTION NEVER change the internal settings of

the transceiver. This may reduce transceiver perfor-

mance 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.

CAUTION NEVER touch the transceiver top cover

when transmitting continuously for long periods. The

top cover may be hot.

CAUTION The transceiver weighs approx. 25 kg

(55 lb). Always have two people available to carry, lift

or turn over the transceiver.

CAUTION The line-voltage receptacle must be near

the transceiver and must be easily accessible. Avoid

extension cords.

CAUTION NEVER let metal, wire or other objects

protrude into the transceiver or into connectors on the

rear panel. This may result in an electric shock.

CAUTION NEVER block any cooling vents on the

top, rear or bottom of the transceiver.

CAUTION NEVER expose the transceiver to rain,

snow or any liquids.

CAUTION NEVER install the transceiver in a place

without adequate ventilation. Heat dissipation may be

reduced, and the transceiver may be damaged.

CAUTION NEVER operate or touch the trans-

ceiver with wet hands. This may result in an electric

shock or damage to the transceiver.

DO NOT

use chemical agents such as benzine or al-

cohol when cleaning the IC-7800, 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

environments 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-7800 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

malfunction or defect, but a normal characteristic of

LCD displays.

During maritime mobile operation, keep the trans-

ceiver and microphone as far away as possible from

the magnetic navigation compass to prevent errone-

ous indications.

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 de-

vice, not expressly approved by Icom Inc., could void

your authority to operate this device under FCC regu-

lations.

qAC power cable* �� 1

wAntenna jumper cables �� 2

eRack mounting handles �� 1 pair

rScrews for rack mounting handles �� 1 set

tCF (Compact Flash) memory card �� 1

yStands �� 1 pair

uSpare fuse (FGB 2 A)�� 1

iRCA plugs �� 2

oDC power plug�� 1

!0 2-conductor 1⁄8″plugs�� 3

!1 3-conductor 1⁄8″plugs�� 2

!2 3-conductor 1⁄4″plugs�� 3

!3 ACC plugs (7-pin) �� 2

!4 ACC plugs (8-pin) �� 2

!5 Antenna connector caps �� 4

*May differ from that shown depending on the version

iii

SUPPLIED ACCESSORIES

q

!0

!1 !2 !3 !4 !5

y u i o

e

wr

t

FOR CLASS B UNINTENTIONAL RADIATORS

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part

15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in

a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not in-

stalled and used in accordance with the instructions, may cause harmful interference to radio communications.

However, there is no guarantee that interference will not occur in a particular installation. If this equipment does

cause harmful interference to radio or television reception, which can be determined by turning the equipment off

and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and receiver.

• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

• Consult the dealer or an experienced radio/TV technician for help.

TABLE OF CONTENTS

Section 1 PANEL DESCRIPTION

■Front panel �� 1-2

■Rear panel �� 1-12

■LCD display�� 1-14

■Screen menu arrangement �� 1-15

iv

Section 2 INSTALLATION AND CONNECTIONS

■Unpacking �� 2-2

■Antenna jumper cable connection �� 2-2

■Selecting a location �� 2-2

■Rack mounting handle attachment �� 2-2

■Grounding �� 2-3

■Antenna connection �� 2-3

■CF (Compact Flash) memory card �� 2-3

■Required connections �� 2-4

DFront panel �� 2-4

DRear panel �� 2-4

■Advanced connections �� 2-5

DFront panel �� 2-5

DRear panel—1 �� 2-5

DRear panel—2 �� 2-6

■Linear amplifier connections �� 2-7

DConnecting the IC-PW1/EURO �� 2-7

DConnecting a non-Icom linear amplifier �� 2-7

■Transverter jack information�� 2-8

■FSK and AFSK (SSTV) connections �� 2-8

■Microphone connector information �� 2-9

■Microphones (options) �� 2-9

DSM-20 �� 2-9

DSM-50 �� 2-9

DHM-36 �� 2-9

■Accessory connector information �� 2-10

Section 3 BASIC OPERATIONS

■When first applying power (CPU resetting) �� 3-2

■Initial settings �� 3-2

■Main/Sub band selection �� 3-3

■Selecting VFO/memory mode �� 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

■Operating mode selection�� 3-8

■Volume setting �� 3-9

■RF gain adjustment �� 3-9

■Squelch level adjustment �� 3-9

■Meter indication selection �� 3-10

DMulti-function digital meter �� 3-10

DMeter type selection �� 3-11

■Basic transmit operation �� 3-12

DTransmitting �� 3-12

DMicrophone gain adjustment �� 3-12

DDrive gain adjustment �� 3-13

■Band edge warning beep �� 3-13

DProgramming the user band edge �� 3-14

TABLE OF CONTENTS

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

DAbout 137 kHz band operation

(Europe, UK, Italy, Spain, France versions only) �� 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 mode�� 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

■Repeater operation �� 4-32

DRepeater tone frequency setting�� 4-32

■Tone squelch operation �� 4-33

■Data mode (AFSK) operation �� 4-34

v

TABLE OF CONTENTS

vi

Section 5 FUNCTIONS FOR RECEIVE

■Spectrum scope screen �� 5-2

DCenter mode �� 5-2

DFix 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

■Dualwatch operation �� 5-16

■Noise blanker �� 5-17

DNB set mode �� 5-17

■Noise reduction �� 5-18

■Dial lock function �� 5-18

■Notch function�� 5-19

■Digital selector �� 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 CF card �� 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 [Y]/[Z] keys �� 8-2

DUsing the keypad �� 8-2

■Memory list screen�� 8-3

DSelecting a memory channel using the memory list screen �� 8-3

DConfirming programmed memory channels �� 8-3

■Memory channel programming �� 8-4

DProgramming in VFO mode �� 8-4

DProgramming in memory mode �� 8-4

■Frequency transferring �� 8-5

DTransferring in VFO mode �� 8-5

DTransferring in memory mode �� 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 and operating mode 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/∂F scan �� 9-5

■Memory scan operation �� 9-6

■Select memory scan operation �� 9-6

■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

vii

TABLE OF CONTENTS

viii

Section 10 ANTENNA TUNER 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

■Antenna tuner operation �� 10-5

DTuner operation �� 10-5

DIf the tuner cannot tune the antenna �� 10-6

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 �� 12-6

■Display set mode �� 12-11

■Miscellaneous (Others) set mode �� 12-14

■CF card set menu �� 12-23

DCF card set screen arrangement �� 12-23

DSave option set mode �� 12-24

DLoad option set mode �� 12-25

■File saving �� 12-26

■File loading �� 12-27

■Changing the file name �� 12-28

■Deleting a file �� 12-29

■Formatting the CF card �� 12-29

Section 13 MAINTENANCE

■Troubleshooting �� 13-2

DTransceiver power�� 13-2

DTransmit and receive�� 13-2

DScanning �� 13-3

DDisplay�� 13-3

■Main dial brake adjustment �� 13-3

■Voice synthesizer operation �� 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

■Fuse replacement �� 13-7

■Resetting the CPU �� 13-7

■About protection indications �� 13-8

■Screen saver function �� 13-8

TABLE OF CONTENTS

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

DData contents description�� 14-9

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— CF memory card �� 16-4

■Firmware update— PC �� 16-6

DConnections �� 16-6

DIP address setting �� 16-7

DUpdating from the 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 �� 1-15

1-2

■Front panel

qPOWER SWITCH [POWER] (p. 3-2)

➥Push to turn the transceiver power ON.

• The [POWER] indicator above this switch lights

green when powered ON.

➥Push 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 [TRANSMIT]

Selects transmitting or receiving.

• The [TX] indicator lights red while transmitting and the

[RX] indicator lights green when the squelch is open.

eANTENNA TUNER SWITCH [TUNER] (p. 10-5)

➥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

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 [TIMER] (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 for 1 sec.

tHEADPHONE JACK [PHONES]

Accepts standard stereo headphones.

• Output power: 50 mW with an 8 Ωload.

• When headphones are connected, the internal speaker

or connected external speaker does not function.

y

ELECTRONIC KEYER JACK [ELEC-KEY] (p. 2-4)

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)

• A straight key jack is located on the rear panel. See

[KEY] on p. 1-13.

• Keyer polarity (dot and dash) can be reversed in keyer

set mode. (p. 4-12)

• 4-channel memory keyer is available for your conve-

nience. (p. 4-8)

(dot)

(com)

(dash)

uMICROPHONE CONNECTOR [MIC]

Accepts an optional microphone.

• See p. 15-4 for appropriate microphones.

• See p. 2-9 for microphone connector information.

1PANEL DESCRIPTION

q

w

e

r

t

y

u

i o !0 !1 !2 !3

!

4

!

5

!

6

!

7

!

8

Turn the internal power supply ON in advance. The

internal power supply switch is located on the rear

panel. (p. 3-2)

1-3

iRF 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

Increases

Decreases

oMIC GAIN CONTROL [MIC]

Adjusts microphone gain.

• The transmit audio tone in SSB, AM and FM modes can

be adjusted independently in set mode. (p. 12-4)

✔How to set the microphone gain.

Set the [MIC] control so that the ALC meter swings within

the ALC range during normal voice level transmission in the

SSB or AM modes. (The ALC meter must be selected.)

Recommended level for

an Icom microphone

Decreases Increases

!0 VOX/BREAK-IN SWITCH [VOX/BK-IN]

➥Push to turn the VOX function ON and OFF dur-

ing SSB, AM and FM mode operation. (p. 6-2)

➥Push to turn the break-in function ON (semi-break-

in, full-break-in) and OFF during CW mode opera-

tion. (p. 6-3)

➥Push for 1 sec. to enter VOX set mode. (p. 6-2)

✔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.

✔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

during keying.

!1 ELECTRONIC CW KEYER SPEED CONTROL

[KEY SPEED] (p. 4-4)

Adjusts the internal electronic CW keyer’s speed.

• 6 wpm (min.) to 48 wpm (max.) can be set.

Max.

48 wpm

Min.

6 wpm

!2 BREAK-IN DELAY CONTROL [DELAY] (p. 6-3)

 Adjusts the transmit-to-receive switching delay time

for CW semi-break-in operations.

Long delay for

slow speed keying

Short delay for

high speed keying

!3 MONITOR SWITCH [MONI] (p. 6-4)

Monitors your transmitted IF signal.

• The CW sidetone functions regardless of [MONI] switch

setting in CW mode.

• The [MONI] indicator above this switch lights green

while the function is activated.

!4 MEMORY CARD SLOT [CF CARD] (p. 2-3)

Insert the supplied CF (Compact Flash) memory

card for both reading/storing a wide variety of the

transceiver’s information and data.

• The indicator beside the slot lights or blinks when the

transceiver reads or writes to the memory card.

• Push the eject button to remove the memory card.

!5

MONITOR GAIN CONTROL [MONI GAIN] (p. 6-4)

Adjusts the transmit IF signal monitor level.

Monitor gain

decreases

Monitor gain

increases

Push

!6 COMPRESSION LEVEL CONTROL [COMP]

(p. 6-5)

Adjusts the speech compression level in SSB.

Compression

gain decreases

Compression

gain increases

Push

!7 DRIVE GAIN CONTROL [DRIVE] (p. 3-13)

Adjusts the transmitter level at the driver stage. Ac-

tivate in all modes (except SSB with [COMP] OFF).

Decreases

Increases

Push

!8 VOX GAIN CONTROL [VOX GAIN] (p. 6-2)

 Adjusts the transmit/receive switching threshold

level for VOX operation.

Low

sensitivity

High

sensitivity

Push

1

PANEL DESCRIPTION

1-4

■Front panel (continued)

!9 AGC CONTROL [AGC] (for MAIN band; p. 5-11)

@0 AGC CONTROL [AGC] (for SUB band; p. 5-11)

 Adjusts the continuously-variable AGC circuit time

constant.

• To use [AGC] control, push the appropriate band’s

[AGC VR] ([AGC VR] indicator lights).

Slow

Fast

@1 AGC VOLUME SWITCH [AGC VR]

(for MAIN band; p. 5-11)

@2 AGC VOLUME SWITCH [AGC VR]

(for SUB band; p. 5-11)

 ➥

Push to toggle [AGC] control usage ON and OFF.

• Use [AGC] control to set the AGC 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 for

1 sec.

@3 AF CONTROL [AF] (inner control; for SUB band)

@4 AF CONTROL [AF] (inner control; for MAIN band)

Varies the audio output level of the speaker or

headphones.

Audio output

increases

Audio output

decreases

@5 RF GAIN CONTROL [RF]

(outer control; for MAIN band; p. 3-9)

@6 RF GAIN CONTROL [RF]

(outer control; for SUB band; 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.

Sensitivity

increases

Sensitivity

decreases

@7 SQUELCH CONTROL [SQL]

(outer control; for MAIN band; p. 3-9)

@8 SQUELCH CONTROL [SQL]

(outer control; for SUB band; p. 3-9)

Adjusts the squelch threshold level. The squelch re-

moves noise output from the speaker (closed con-

dition) when no signal is received.

• The squelch is particularly effective for FM. It is also

available for other modes.

• 11 to 12 o’clock position is recommended for any set-

ting of the [SQL] control.

Deep

S-meter

squelch

Noise squelch

Squelch

is open.

Squelch

threshold

Shallow

1PANEL DESCRIPTION

@6

@4

@5

@1

@2

@3

#

2

!9

#0 #1@9

@0

#

3

#

4

@7 @8

1-5

@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.

➥Selects the antenna connector from

ANT1, ANT2, ANT3 and ANT4 when

pushed. (p. 10-2)

➥Displays antenna selection memory

when pushed for 1 sec.

• When the receive antenna is activated, the

antenna which is connected to [ANT4] is

used for receive only.

When a transverter is in use, this [ANT]

does not function and ‘TRV’ appears.

➥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 for 1 sec.

(p. 3-10)

➥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 preamp.

✔What is the preamp?

The preamp amplifies received signals in the front end cir-

cuit to improve S/N ratio and sensitivity. Select “P. AMP1” or

“P. AMP2” when receiving weak signals.

➥Selects 6 dB, 12 dB or 18 dB attenuator

when pushed. (p. 5-9)

➥Selects 3 dB, 6 dB, 9 dB, 12 dB, 18 dB,

or 21 dB attenuator when pushed for

1 sec. (p. 5-9)

✔What is the attenuator?

The attenuator prevents a desired signal from distorting

when very strong signals are near the desired frequency, or

when very strong electric fields, such as from a broadcasting

station, are near your location.

➥Activates and selects fast, middle or slow

AGC time constant when pushed. (p. 5-

11)

• In FM mode, only “FAST” is available.

➥Enters the AGC set mode when pushed

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.

➥Turns the speech compressor ON and

OFF in SSB mode. (p. 6-5)

➥Switches the narrow, middle or wide

compression when pushed for 1 sec.

✔What is the speech compressor?

The speech compressor compresses the transmitter audio

input to increase the average audio output level, to increase

talk power. This function is effective for long-distance com-

munication 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 normal

speed for fine tuning.

➥Switches between the tone encoder,

tone squelch function and no-tone oper-

ation when pushed in FM mode. (pgs. 4-

32, 4-33)

➥Enters the tone set mode when pushed

for 1 sec. in FM mode. (pgs. 4-32, 4-33)

➥Switches the voice squelch control func-

tion ON and OFF; useful for scanning.

(p. 9-3)

#0 TRANSMIT INDICATOR [TX] (for MAIN band)

#1 TRANSMIT INDICATOR [TX] (for SUB band)

Lights red while transmitting.

• SUB band’s [TX] indicator lights only when in split oper-

ation.

#2 ANTI VOX CONTROL [ANTI VOX] (p. 6-2)

 Adjusts the VOX deactivate level to prevent un-

wanted VOX activation from the speaker audio.

Decreases

cut-off level

Increases

cut-off level

Push

#3 LCD CONTRAST CONTROL [CONTRAST]

Adjusts the LCD contrast.

Low

contrast

High

contrast

Push

#4 LCD BRIGHTNESS CONTROL [BRIGHT]

Adjusts the LCD brightness.

Dark

Bright

Push

1

PANEL DESCRIPTION

1-6

■Front panel (continued)

#5 NOISE REDUCTION SWITCH [NR] (for MAIN

band; p. 5-18)

#6 NOISE REDUCTION SWITCH [NR] (for SUB band;

p. 5-18)

 Push to switch the DSP noise reduction ON and

OFF.

• The [NR] indicator above this switch lights green when

the function is activated.

#7 NOISE REDUCTION LEVEL CONTROL [NR]

(inner control; for SUB band; p. 5-18)

#8 NOISE REDUCTION LEVEL CONTROL [NR]

(inner control; for MAIN band; p. 5-18)

 Adjusts the DSP noise reduction level when the

noise reduction is in use. Set for maximum read-

ability.

• To use this control, push the appropriate band’s [NR].

Increases

Decreases

#9 NOISE BLANKER CONTROL [NB] (outer control;

for MAIN band; p. 5-17)

$0 NOISE BLANKER CONTROL [NB] (outer control;

for SUB band; p. 5-17)

Adjust the noise blanker threshold level.

• To use this control, push appropriate band’s [NB]

switch.

Deep

Shallow

$1 NOISE BLANKER SWITCH [NB] (for MAIN band;

p. 5-17)

$2 NOISE BLANKER SWITCH [NB] (for SUB band;

p. 5-17)

➥Switches the noise blanker ON and OFF when

pushed. The noise blanker reduces pulse-type

noise such as that generated by automobile ig-

nition systems. This function cannot be used for

FM, or non-pulse-type noise.

• The [NB] indicator above this switch lights green

while the function is activated.

 ➥ Enters blank-width set mode when pushed for

1 sec.

$3 RECEIVE INDICATOR [RX] (for MAIN band)

$4 RECEIVE INDICATOR [RX] (for SUB band)

Lights green while receiving a signal and when the

squelch is open.

$5

LOCK INDICATOR [LOCK] (for MAIN band; p. 5-18)

$6

LOCK INDICATOR [LOCK] (for SUB band; p. 5-18)

Lights when the dial lock function is activated.

$7 SPLIT OPERATION INDICATOR [SPLIT]

Lights during split frequency operation.

$8 LCD FUNCTION DISPLAY (p. 1-14)

Shows the operating frequency, function switch

menus, spectrum scope screen, memory channel

screen, set mode settings, etc.

1PANEL DESCRIPTION

#5

#6

$1 $2

#8

#9

$5$3 $6 $9$4$7 $8

#7

$0

%

0

%

1

%

3

%

4

%

6

%

2

%

5

1-7

$9 MEMORY UP/DOWN SWITCHES [Y]/[Z](p. 8-2)

Push to select the desired memory channel.

• Memory channels can be selected both in VFO and

memory modes.

%0 LCD FUNCTION SWITCHES [F-1]–[F-7]

Push to select the function indicated in the LCD dis-

play above these switches.

• Functions vary depending on the operating condition.

%1 MODE SWITCHES

Selects the desired mode. (p. 3-8)

• Announces selected mode via the speech synthesizer.

(p. 12-17)

➥

Selects USB and LSB modes alternately.

➥Selects CW and CW-R (CW reverse)

modes alternately.

➥Switches between RTTY and PSK

mode.

➥Switches RTTY and RTTY-R (RTTY re-

verse) mode when pushed for 1 sec. in

RTTY mode.

➥Switches PSK and PSK-R (PSK reverse)

mode when pushed 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, respectively.

➥Switches D1, D2 and D3 when pushed

for 1 sec.

%2 MINI SPECTRUM SCOPE SWITCH [M.SCOPE]

(p. 5-4)

Turns the mini spectrum scope screen ON and OFF.

• The mini spectrum scope screen can be displayed with

another screen, such as memory or set mode screen,

simultaneously.

%3 VOICE MEMORY RECORD SWITCH [REC]

(p. 7-3)

➥Push to store the previous received signal for the

preset time period.

• The preset time period can be set in the voice set

mode. (p. 7-9)

➥Push and hold for 1 sec. to start recording the re-

ceived signal until the recording is stopped.

• Push this switch momentarily to stop recording.

• The memory records the latest 30 sec. of audio.

%4 VOICE MEMORY PLAY BACK SWITCH [PLAY]

(p. 7-4)

➥

Push to playback the selected voice memory in

the RX memory screen for the preset time period.

• When the RX memory screen is not displayed, the

previously recorded audio is played back for the

preset time period.

➥Push and hold for 1 sec. to playback all of the se-

lected voice memory in the RX memory screen.

• When the RX memory screen is not displayed, all of

the previously recorded audio is played back.

%5 EXIT/SET SWITCH [EXIT/SET]

➥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

for 1 sec.

%6 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

[Y]/[Z] switches.

• When the split lock function is turned ON, pushing [XFC]

cancels the dial lock function. (p. 6-7)

1

PANEL DESCRIPTION

1-8

■Front panel (continued)

%7 MEMO PAD-WRITE SWITCH [MP-W] (p. 8-7)

Programs the selected readout frequency and oper-

ating 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. 12-17)

%8 VFO/MEMORY SWITCH [V/M]

➥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 for 1 sec. (p. 5-5)

%9 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. 3-4)

• Icom’s triple band stacking register memorizes 3 fre-

quencies in each band.

➥After pushing [F-INP•ent], enters a frequency or

memory channel. Pushing [F-INP•ent] or [Y/[Z]

is necessary to end. (pgs. 3-5, 8-2)

• e.g. to enter 14.195 MHz, push [F-INP] [1.8•1] [10•4]

[GENE •] [1.8•1] [28•9] [14•5] [F-INP•ent].

^0 MEMORY WRITE SWITCH [MW] (p. 8-4)

Stores the selected readout frequency and operat-

ing mode into the displayed memory channel when

pushed for 1 sec.

• This function is available both in VFO and memory

modes.

^1 MEMO PAD-READ SWITCH [MP-R] (p. 8-7)

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. (p. 12-17)

^2

FILTER SWITCH [FILTER] (for MAIN band; p. 5-13)

^3

FILTER SWITCH [FILTER] (for SUB band; p. 5-13)

➥Selects one of 3 IF filter settings.

➥Enters the filter set screen when pushed for

1 sec.

^4 AUDIO PEAK FILTER/TWIN PEAK FILTER

SWITCH [APF/TPF] (for MAIN band)

^5 AUDIO PEAK FILTER/TWIN PEAK FILTER

SWITCH [APF/TPF] (for SUB band)

➥Push to turn the audio peak filter ON and OFF

during CW mode operation. (p. 4-6)

➥Push to turn the twin peak filter ON and OFF

during RTTY mode operation. (p. 4-14)

• “ ” appears when audio peak filter is in use.

• “ ” appears when twin peak filter is in use.

➥During CW mode operation, push for 1 sec. to

select the APF passband width from 80, 160 and

320 Hz. (p. 4-6)

1PANEL DESCRIPTION

%7 %8 ^0 ^1%9

&

0

&

8

&

1

&

5

&

4

&

2

&

6

&

3

&

7

&

9

^2 ^3

^5

^4

^6

^7

^9

^8

1-9

^6

NOTCH SWITCH [NOTCH] (for SUB band; p. 5-19)

^7

NOTCH SWITCH [NOTCH] (for MAIN band; p. 5-19)

➥Switches the notch function between auto, man-

ual and OFF in SSB and AM modes.

➥Turns the manual notch function ON and OFF

when pushed in CW, RTTY and PSK31 mode.

➥Turns the auto notch function ON and OFF when

pushed in FM mode.

• “ ” appears when auto notch is in use.

• “ ” appears when manual notch is in use.

➥Switches the manual notch characteristics

from wide, middle and narrow when pushed for

1 sec.

✔What is the notch function?

The notch function eliminates unwanted CW or AM carrier

tones while preserving the desired voice signal. The DSP

circuit automatically adjusts the filtering frequency to effec-

tively eliminate unwanted tones.

^8 DUALWATCH SWITCH [DUALWATCH] (p. 5-16)

➥Turns the dualwatch function ON and OFF when

pushed.

➥Turns the dualwatch function ON and equalizes

the main/sub readout frequency to the sub/main

readout when pushed for 1 sec. (Quick dualwatch

function)

• The quick dualwatch function can be turned OFF

using set mode. (p. 12-15)

^9 SPLIT SWITCH [SPLIT] (p. 6-6)

➥Turns the split function ON and OFF when

pushed.

➥Turns the split function ON. When pushed for

1 sec. in non-FM modes, equalizes the sub read-

out frequency to the main readout and sets the

sub readout for frequency input. (Quick split func-

tion)

• The offset frequency is shifted from the main readout

frequency in FM mode. (p. 12-15)

• The quick split function can be turned OFF using set

mode. (p. 12-15)

➥Turns the split function ON and shifts the sub

readout frequency after inputting an offset.

&0 MAIN BAND ACCESS SWITCH [MAIN]

Selects the main readout.

• The main readout frequency is clearly displayed. The

sub readout functions only during split operation or du-

alwatch.

&1 MAIN/SUB EQUALIZING SWITCH [M=S]

Equalizes the sub readout frequency to the main

readout frequency when pushed for 1 sec.

&2 AUTOMATIC TUNING SWITCH [AUTO TUNE]

(for MAIN band)

&3 AUTOMATIC TUNING SWITCH [AUTO TUNE]

(for SUB band)

Turns the automatic tuning function ON and OFF in

CW and AM modes.

&4 MAIN DIAL

Changes the displayed frequency (main band), se-

lects set mode setting, etc.

&5 MAIN/SUB CHANGE SWITCH [CHANGE]

Switches the frequency and selected memory chan-

nel between main and sub readouts when pushed.

•

Switches between transmit frequency and receive fre-

quency when the split frequency function is ON. (p. 6-6)

&6 LOCK SWITCH [LOCK] (for MAIN band; p. 5-18)

&7 LOCK SWITCH [LOCK] (for SUB band; p. 5-18)

Push to switch the dial lock function ON and OFF.

&8 SUB BAND ACCESS SWITCH [SUB]

Selects the sub readout.

• The sub readout frequency is clearly displayed. The

main readout functions only during split operation or du-

alwatch.

&9 SUB DIAL

Changes the displayed frequency in sub band.

1

PANEL DESCRIPTION

IMPORTANT!

When receiving a weak signal, or receiving a signal

with interference, the automatic tuning function may

tune the receiver to an undesired signal.

1-10

■Front panel (continued)

*0 RIT/∂TX CONTROL [RIT/∂TX] (pgs. 5-10, 6-4)

Shifts the receive and/or transmit frequency without

changing the transmit and/or receive frequency.

• Rotate the control clockwise to increase the frequency,

or rotate the control counterclockwise to decrease the

frequency. The RIT or ∂TX functions must be ON.

• The shift frequency range is ±9.999 kHz in 1 Hz steps

(or ±9.99 kHz in 10 Hz steps).

Frequency

increases

Frequency

decreases

*1 PASSBAND TUNING CONTROLS [TWIN PBT]

(for MAIN band; p. 5-12)

*2 PASSBAND TUNING CONTROLS [TWIN PBT]

(for SUB band; 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 [PBT CLEAR] for 1 sec. to clear the PBT settings.

• Variable 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.

PBT2

PBT1

Low cutHigh cut Center

– +

*3 PBT CLEAR SWITCH [PBT CLEAR]

(for MAIN band; p. 5-12)

*4 PBT CLEAR SWITCH [PBT CLEAR]

(for SUB band; p. 5-12)

Clears the PBT settings when pushed for 1 sec.

• The [PBT CLEAR] indicator above this switch lights

when PBT is in use.

1PANEL DESCRIPTION

*0

(

5

(

6

(

7

(

8

*3*1 *2*4

*8

*7

*9

(0

(2

(3

(4

*6

*5

(1

Icom IC-7800 User manual

Popular Transceiver manuals by other brands