ICOM orporated IC-703 HF / VHF Amateur Transceiver User Manual IC 703 INSTRUCTION MANUAL ENGLI

ICOM Incorporated HF / VHF Amateur Transceiver IC 703 INSTRUCTION MANUAL ENGLI

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IC 703 User Manual HTML Version

Users Manual

HF/50 MHz

ALL MODE TRANSCEIVER

i703

INSTRUCTION MANUAL

FOREWORD

Thank We understand that you have a choice of many

different radios in the market place. We want to take a

couple of moments of your time to thank you for mak-

ing the IC-703 your radio of choice, and hope you

agree with Icom’s philosophy of “technology first.”

Many hours of research and development went into

the design of your IC-703.

FEATURES

❍

DSP features (AF DSP; UT-106

DSP UNIT

required

some version)

❍

All mode capability covering 160–6 m

❍

9.0–15.87 V operation

❍

Compact with detachable front panel

❍

±0.5 ppm of high frequency stability

❍

Built in antenna tuner

❍

Simple band scope function

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-703.

EXPLICIT DEFINITIONS

RWARNING RF EXPOSURE! This device emits

Radio Frequency (RF) energy. Extreme caution should be

observed when operating this device. If you have any

questions regarding RF exposure and safety standards

please refer to the Federal Communications Commission

Ofﬁce of Engineering and Technology’s report on Evalu-

ating Compliance with FCC Guidelines for Human Radio

Frequency Electromagnetic Fields (OET Bulletin 65).

RWARNING HIGH VOLTAGE! NEVER attach an

antenna or internal antenna connector during transmis-

sion. This may result in an electrical shock or burn.

RNEVER apply AC to the [DC13.8V] receptacle on the

transceiver rear panel. This could cause a ﬁre or damage

the transceiver.

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

battery, to the [DC13.8V] receptacle on the transceiver

rear panel. This could cause a ﬁre or damage the trans-

ceiver.

RNEVER let metal, wire or other objects touch any in-

ternal part or connectors on the rear panel of the trans-

ceiver. 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 tem-

peratures 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 permanent damage to

the transceiver if left there for extended periods.

AVOID placing the transceiver in excessively dusty envi-

ronments or in direct sunlight.

AVOID placing the transceiver against walls or putting

anything on top of the transceiver. This will obstruct heat

dissipation.

Place unit in a secure place to avoid inadvertent use by

children.

During mobile operation, DO NOT operate the transceiver

without running the vehicle’s engine. When the trans-

ceiver’s power is ON and your vehicle’s engine is OFF,

the vehicle’s battery will soon become exhausted.

Make sure the transceiver power is OFF before starting

the vehicle. This will avoid possible damage to the trans-

ceiver by ignition voltage spikes.

During maritime mobile operation, keep the transceiver

and microphone as far away as possible from the magnetic

navigation compass to prevent erroneous indications.

BE CAREFUL! The rear panel will become hot when op-

erating the transceiver continuously for long periods.

BE CAREFUL! If a linear ampliﬁer is connected, set the

transceiver’s RF output power to less than the linear am-

pliﬁer’s maximum input level, otherwise, the linear ampli-

ﬁer will be damaged.

Use Icom microphones only (supplied or optional). Other

manufacturer’s microphones have different pin assign-

ments, and connection to the IC-703 may damage the

transceiver.

Beat signals may be heard on some frequencies.

These will occur as a result of circuit construction.

For U.S.A. only

Caution: Changes or modiﬁcations to this transceiver, not

expressly approved by Icom Inc., could void your authority

to operate this transceiver under FCC regulations.

PRECAUTION

WORD DEFINITION

RWARNING Personal injury, ﬁre hazard or electric

shock may occur.

CAUTION Equipment damage may occur.

NOTE

If disregarded, inconvenience only. No

risk or personal injury, fire or electric

shock.

SUPPLIED ACCESSORIES

The transceiver comes with the following accessories.

Qty.

qHand microphone (HM-103) .............................. 1

wDC power cable (OPC-1229) ............................. 1

eSpare fuse (FGB 4 A) ........................................ 3

rACC cable ...........................................................1

t3.5 (d) mm plug ...................................................1

y6.5 (d) mm Electronic keyer plug.........................1

uMicrophone hanger..............................................1

TABLE OF CONTENTS

ty u

Icom, Icom Inc. and the logo are registered trademarks of Icom Incorporated (Japan) in the United States, the United King-

dom, Germany, France, Spain, Russia and/or other countries.

FOREWORD …………………………………………… i

IMPORTANT ……………………………………………i

EXPLICIT DEFINITIONS ……………………………… i

PRECAUTION …………………………………………i

TABLE OF CONTENTS ……………………………… ii

QUICK REFERENCE GUIDE ……………… I–X

■Installation ………………………………………… I

1. Grounding your Shack ……………………… I

2. Installing your DC Power Supply ………… I

3. Installing lightning protection ……………… II

4. Installing your antenna system …………… II

5. Connect other peripheral equipment …… III

■Operation ………………………………………… III

1. Voice ………………………………………… III

2. CW…………………………………………… III

3. Other convenient items …………………… IV

■Your ﬁrst contact ………………………………… IV

DGetting started ………………………………… IV

DJust listening …………………………………… V

1. Select the desired band …………………… V

2. Tune to the desired frequency …………… V

3. Adjust audio output ………………………… V

DWhat are you hearing? ……………………… VI

1. Verify mode ………………………………… VI

2. Reducing interference

(Some functions may require

an optioanl unit depending on version) … VI

■Ready to call CQ? ……………………………… IX

1. Setting up your Mic Gain ………………… IX

2. Speech compressor………………………… X

1 PANEL DESCRIPTION ………………… 1–10

■Front panel ………………………………………… 1

■Multi-function switches …………………………… 4

DM1 functions …………………………………… 4

DM2 functions …………………………………… 4

DM3 functions …………………………………… 4

DM4 functions …………………………………… 5

DS1 functions …………………………………… 6

DS2 functions …………………………………… 6

DS3 functions …………………………………… 6

DS4 functions

(UT-106 is required for some version) ……… 6

■Rear panel ………………………………………… 7

DDATA socket …………………………………… 8

DACC socket……………………………………… 8

■Function display…………………………………… 9

■Microphone (HM-103) ………………………… 10

INSTALLATION AND CONNECTIONS

… 11–16

■Unpacking………………………………………… 11

■Selecting a location……………………………… 11

■Grounding………………………………………… 11

■Antenna connection……………………………… 11

■Installation ……………………………………… 12

DSingle body mounting ………………………… 12

DStand …………………………………………… 12

DFront panel separation ……………………… 12

DFront panel mounting ………………………… 12

■Required connections…………………………… 13

■Advanced connections ………………………… 14

■DC Power voltage ……………………………… 15

■DC Power supply connections ………………… 15

■Battery connections …………………………… 15

■External antenna tuners and linear ampliﬁer … 16

Quick Reference

iii

3 BASIC OPERATION ……………………17–26

■When ﬁrst applying power (CPU resetting)…… 17

DM1 display selection ………………………… 17

■Initial settings …………………………………… 17

■VFO description ………………………………… 18

DThe differences between VFO and

memory mode ………………………………… 18

■Frequency setting ……………………………… 19

■Operating mode selection ……………………… 23

■Volume setting …………………………………… 23

■Squelch and receive (RF) sensitivity ………… 24

■Dial lock function ………………………………… 25

■Basic transmit operation ……………………… 25

DTransmitting …………………………………… 25

DMaximum output power ……………………… 25

DSetting output power ………………………… 26

DSetting microphone gain……………………… 26

4 RECEIVE AND TRANSMIT …………… 27–45

■Operating SSB…………………………………… 27

DConvenient functions for receive …………… 27

DConvenient functions for transmit …………… 27

■Operating CW …………………………………… 28

DConnections for CW ………………………… 28

DCW operation ………………………………… 29

DConvenient functions for receive …………… 30

DConvenient functions for transmit …………… 30

DCW reverse mode …………………………… 30

DCW pitch control ……………………………… 31

DElectronic CW keyer ………………………… 31

DCW side tone function………………………… 32

DKeyer set mode ……………………………… 32

■Memory keyer functions………………………… 33

DMemory keyer send menu …………………… 34

DEditing a memory keyer ……………………… 35

DContest number set mode …………………… 36

DMemory keyer set mode……………………… 37

■Operating RTTY ………………………………… 38

DConnections for RTTY (FSK)………………… 38

DRTTY (FSK) operation ……………………… 38

DConvenient functions for receive …………… 39

DRTTY reverse mode ………………………… 39

DPresetting for RTTY ………………………… 40

DRTTY tone set mode ………………………… 40

■Operating AM …………………………………… 41

DConvenient functions for receive …………… 41

DConvenient functions for transmit …………… 41

■Operating FM …………………………………… 42

DConvenient functions for receive …………… 42

DConvenient functions for transmit …………… 42

DTone squelch operation ……………………… 43

DTone scan operation ………………………… 43

DFM tone set mode …………………………… 44

■Repeater operation ……………………………… 45

5 FUNCTION FOR RECEIVE …………… 46–50

■Simple band scope ……………………………… 46

■Preamp and attenuator ………………………… 46

■RIT function ……………………………………… 47

■IF shift function ………………………………… 47

■Noise blanker …………………………………… 48

DNoise blanker level set mode ……………… 48

■AGC time constant ……………………………… 48

■Optional ﬁlter selection ………………………… 49

■Peak meter hold ………………………………… 50

■DSP Functions (may require an optional unit

depending on version) ………………………… 50

DANF (Automatic Notch Filter) function ……… 50

DNR (Noise Reduction) function ……………… 50

FUNCTION FOR TRANSMIT

…………… 51–55

■Split frequency operation ……………………… 51

DQuick split function …………………………… 52

■Meter selection ………………………………… 52

■VOX operation …………………………………… 53

DVOX set mode ………………………………… 53

■Speech compressor …………………………… 54

DCompression level set mode ………………… 54

■SWR………………………………………………… 55

DMeasuring SWR ……………………………… 55

7 MEMORY OPERATION ………………… 56–60

■Memory channels ……………………………… 56

■Memory channel selection……………………… 56

■Memory programming ………………………… 57

■Memory clearing ………………………………… 58

■Frequency transferring ………………………… 58

■Memory names ………………………………… 59

■Memo pads ……………………………………… 60

8 SCAN OPERATION …………………… 61–63

■Scan types ……………………………………… 61

■Preparation ……………………………………… 61

■Programmed scan operation…………………… 62

■Memory scan operation ………………………… 62

■Select memory scan operation ………………… 63

■Priority watch …………………………………… 63

9 ANTENNA TUNER OPERATION……… 64–66

■Antenna tuner operation ……………………… 64

DInternal antenna tuner………………………… 64

DTuner operation ……………………………… 64

DOptional external tuner operation …………… 65

DOptional AT-180

AUTOMATIC ANTENNA TUNER

operation ……… 65

DOptional AH-4

AUTOMATIC ANTENNA TUNER

operation ……… 66

TABLE OF CONTENTS

10 DATA COMMUNICATION …………… 67–70

■Connections for packet ………………………… 67

DWhen connecting to [DATA] socket ………… 67

DWhen connecting to [ACC] socket ………… 67

DWhen connecting to [MIC] connector ……… 67

■Packet (AFSK) operation ……………………… 68

Frequency indication during AFSK operation …

DSSB-D mode selection ……………………… 69

DCarrier point setting…………………………… 69

DAdjusting the transmit signal from the TNC… 70

11 CONTROL COMMAND ……………… 71–73

■Remote jack (CI-V) information ……………… 71

DCI-V connection example ……………………… 71

DData format ……………………………………… 71

Command table ……………………………… 72

DBand stacking register ……………………… 73

DCodes for memory keyer contents ………… 73

DCodes for memory name contents ………… 73

12 SET MODE …………………………… 74–82

■General …………………………………………… 74

DQuick set mode operation …………………… 74

DInitial set mode operation …………………… 74

■Quick set mode items…………………………… 75

■Initial set mode items …………………………… 76

1 Maximum output power setting ………… 76

2 Power save setting ……………………… 76

3 Simple mode setting ……………………… 76

4 Mode availability ………………………… 76

5 Output power setting for mode ………… 76

6 Conﬁrmation beeps ……………………… 77

7 Band edges beeps ……………………… 77

8 Beep level adjustment …………………… 77

9 Beep audio level limit …………………… 77

10 CW carrier point setting ………………… 77

11 CW side tone level ……………………… 77

12 CW side tone level limit ………………… 77

13 SSB/CW frequency shift setting ………… 78

14 Display backlighting ……………………… 78

15 Key/switch backlighting ………………… 78

16 Light timer setting ………………………… 78

17 LED brightness …………………………… 78

18 Automatic power OFF …………………… 78

19 Current intercept point …………………… 79

20 RF gain/squelch control ………………… 79

21 Sub dial setting …………………………… 79

22 Optional ﬁlter selection…………………… 79

23 Peak meter hold setting ………………… 79

24 Quick split function ……………………… 79

25 Split lock function ………………………… 80

26 Split offset frequency …………………… 80

27 Scan resume condition…………………… 80

28 Scanning speed…………………………… 80

29 [UP]/[DN] speed ………………………… 80

30 Noise blanker in AM mode ……………… 80

31 Available memo pads …………………… 80

32 Power ON check function ……………… 81

33 Auto tune start function ………………… 81

34 PTT tune function ………………………… 81

35 Tuner switch condition …………………… 81

36 Packet data speed ……………………… 81

37 Voice synthesizer language……………… 82

38 Voice synthesizer speed ………………… 82

39 S-meter level speech …………………… 82

40 CI-V address setting ……………………… 82

41 CI-V data transffer rate…………………… 82

42 CI-V transceive …………………………… 82

43 CI-V operating frequency data length … 82

13 MAINTENANCE …………………………… 83

■Fuse replacement ……………………………… 83

■Memory backup ………………………………… 83

■Cleaning ………………………………………… 83

14 TROUBLESHOOTING………………… 84–85

15 OPTIONAL UNIT

INSTALLATIONS AND SETTINGS … 86–89

■Opening the transceiver case ………………… 86

■UT-102

VOICE SYNTHESIZER UNIT

……………… 86

DOperation ……………………………………… 86

■IF ﬁlter …………………………………………… 87

■UT-106

DSP RECEIVER UNIT

…………………… 88

■MB-72

CARRYING HANDLE

……………………… 88

■AT-180 internal switch description …………… 89

16 SPECIFICATIONS ………………………… 90

■General …………………………………………… 90

■Transmitter ……………………………………… 90

■Receiver ………………………………………… 90

■Antenna tuner …………………………………… 90

17 OPTIONS ……………………………… 91–92

18 MENU GUIDE …………………………93–94

19 ABOUT CE……………………………… 95–96

TABLE OF CONTENTS

Quick Reference

QUICK REFERENCE GUIDE

■Installation

1. Install a ground system for DC noise suppression

and RFI suppression

2. Install your DC power supply

3. Install lightning protection. This will help protect

more than your gear.

4. Install and connect an antenna system for the ap-

propriate bands of operation

5. Connect other peripheral equipment. This includes

microphones, headsets, TNC, amplifiers and any

other equipment necessary to make your shack

complete.

Although your radio will operate by connecting the DC

power supply and antenna, it is necessary to have a

good ground system in your shack. A ground connec-

tion is the electrical contact between the common

point of an electrical or electronic system and the

earth.

A good earth ground is necessary to prevent electrical

shock, eliminate problems from RFI and DC noise.

With more electronic devices being used today, it is

also important to reduce RFI and EMI. Although you

may not see interference in your shack, without a

grounding system, your neighbours may experience

interference. Even though many of these devices are

Part 15, where they must accept interference from

their surrounding environment, it is best to eliminate

as much of the possible interference from your shack.

If you do not have a grounding system for your shack,

depending on the location of your shack, basement or

ground ﬂoor, a good ground system can be as simple

as a couple of ground rods driven 6 to 8 feet into the

soil. When installing your IC-703 to your grounding

system, the shortest most direct connection is recom-

mended.

NOTE: There are many publications covering

proper grounding techniques. Check with your local

dealer for more information and recommendations.

RWARNING!: NEVER ground station equip-

ment or antennas to house gas lines. NEVER at-

tach ground lines to plastic (pvc) pipe.

DSome Symptoms if inadequate grounding

a. Poor DC Ground

50/60 Hz hum on the audio either Rx or Tx without

the antenna connected.

If you feel a tingling sensation when you touch a

metal surface. Surfaces such as the cover of your

radio or power supply.

b. Poor RF Ground

While transmitting and you feel a tingling sensation

when you touch a metal surface. Surfaces such as

the cover of your radio or power supply.

While transmitting, you experience interference to

other electronic devices, such as the telephone,

television or stereo audio systems.

The DC power supply is a device used to convert

110/220 V AC, also know as Household current, to a

steady source of 13.8 V DC.

The perfect match to your IC-703 is the PS-125. This

plug and play unit plugs into the DC power recepta-

cle using an optional OPC-1248 located on the rear

of the radio.

Or connect the supplied DC power cable (OPC-1229)

to the appropriate color coded terminals, then insert

the DC connector into the DC power receptacle lo-

cated on the rear of the radio.

NOTE: Although the power supply current require-

ment is quite low during receiving, this not the case

when you transmit. With many electrical devices in

the shack, it is very important to verify the electrical

circuit is not overloaded.

1. Grounding your Shack

2. Installing your DC Power Supply

AC cable

outlet

A DC power

supply*

Black

_ Red

PS-125

DC power cable

Ground

4 A fuses

Transceiver

to DC

power

receptacle

Supplied

OPC-1229

Optional

OPC-1248

Connect to an AC outlet

using the supplied AC cable.

*13.8 V;

at least 3.0 A

continuous

QUICK REFERENCE GUIDE

3. Installing lightning protection

Although you may not live in an area with high occur-

rence for lightning storms, it is always wise to take

precautions for lightning or static discharges. Proper

lightning protection not only offers protection to the

ham gear, but the shack and most importantly the op-

erator.

NOTE: There are many publications covering

proper lightning protection, check with your local

dealer for more information and recommendations.

Whether your IC-703 is your first radio or one of

many, one of your key elements in a great shack is

the antenna system. There is a connection on the

back of your IC-703, for HF and 6 m. If you are using

one antenna for HF and 6 m, for simplicity, connect

the antenna coax to ANT.

Your IC-703 is equipped with an internal antenna

tuner (ATU) for operation on 160–6 m. This ATU is de-

signed to work with an unbalanced 50 Ωfeedline. The

purpose of the internal antenna tuner is to match the

impedance of your antenna system to as close to a

50 Ωload as possible. This ATU will not operate with

a long wire or ladder line (450 Ωor other balanced

feedlines). An external ATU such as the AH-4 would

be necessary for this kind of operation.

PL-259 CONNECTOR INSTALLATION EXAMPLE

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

RWARNING: Although a mag mount antenna

works great on a vehicle, DO NOT use the IC-703

with this type of antenna.

CAUTION: Although your IC-703 has protection to

drop down power with a high SWR, this does not

completely protect the transceiver from transmis-

sion without an antenna. Make sure you have an

antenna connected whenever you transmit with

your radio.

NOTE: There are many publications covering

proper antennas and their installation, check with

your local dealer for more information and recom-

mendations.

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.

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 tran-

sistors. In this case, an antenna tuner is useful to

match the transceiver and antenna. Low SWR al-

lows full power for transmitting even when using the

antenna tuner. The IC-703 has an SWR meter to

monitor the antenna SWR continuously.

ANTENNA

Connect a HF/50MHz antenna

Impedance: 50Ω

4. Installing your antenna system

Quick Reference

Microphones: Connect the microphone to the modu-

lar-type connector bottom of the front panel or back

of the radio.

Rear panel

Front panel

MICROPHONES

HM-103 SM-20 OPC-589

III

QUICK REFERENCE GUIDE

5. Connect other peripheral equipment

Everyone has his or her favorite ad-on gear; now is

the time to connect this gear! We will cover the basic

devices that can be connected to your IC-703.

If you do not see the particular item you are wanting

to connect, refer to the Advance Connections section

starting on page 14.

■Operation

1. Voice

CW Key: There are several types of keys or keyers

that can be used with your IC-703.

a. Iambic Key paddle: Use a 6.35(d) mm (1⁄4″) stereo

plug and connect to the [KEY] jack located on the

rear of the radio.

b. Straight Key: Use a 6.35(d) mm (1⁄4″) mono plug

and connect key to the back of the radio.

c. External Keyer: Use a 6.35(d) mm (1⁄4″) mono

plug and connect to the back of the radio.

d. Computer Keying: Use a 6.35(d) mm (1⁄4″) mono

plug and connect to the back of the radio.

NOTE: You will need to select the type of keyer you

are using in the keyer set mode. There are many

advanced CW functions in this set mode. Until you

have a full understanding of these functions

change only the items necessary.

Rear panel

CW KEY

A straight key can be used when the internal

electronic keyer is turned OFF in keyer set

mode. (p. 32)

When connecting a straight key or else

(+)

(_)

Rear panel

CW KEY

(dot)

(com)

(dash)

When connecting a paddle

2. CW

QUICK REFERENCE GUIDE

3. Other convenient items

Headphones:

A 3.5(d) mm (1⁄4″) mono jack for operation without

using the internal or external speakers. Perfect for op-

eration without disturbing others in the room.

External Speaker:

A 3.5(d) mm (1⁄8″) mono jack for operation with an ex-

ternal speaker. (Input impedance: 8 Ω/Max. input

power: 5 W)

Front panel

Rear panel

SPEAKER

PHONES ∫

SPEAKER √

Select ‘SPEAKER’ with

the [PHONES/SPEAKER]

switch on the back of the

front panel.

SPEAKER

Front panel

HEADPHONES

PHONES ∫

SPEAKER √

Select ‘PHONES’ with the

[PHONES/SPEAKER]

switch on the back of the

front panel.

1. Before powering up your radio, you may want to

make sure the following controls are set in the fol-

lowing positions:

• [AF] : Commonly referred to as the vol-

ume: fully counter clockwise.

• [RF/SQL] : The control for the RF Gain and

Squelch circuits: 12 o’clock.

•[SHIFT] : Shifts the IF center frequency:

12 o’clock

2. Resetting the CPU: Although you have purchased

a brand new radio, some settings may be changed

from the factory defaults during the QC process. So

your radio can start from Factory Defaults resetting

the CPU is necessary. (Refer to p.17)

[POWER]

[Y]

[Z]

■Your ﬁrst contact

Now you should have your IC-703 installed in your

shack, and like a kid on his birthday, you are probably

excited to get on the air. We would like to take you

through a few basic operation steps to make your ﬁrst

“On The Air” an enjoyable experience.

DGetting started

Quick Reference

QUICK REFERENCE GUIDE

DJust listening

1. Select the desired band

3. Adjust audio output

On your IC-703, an easy way of changing bands is by

using the [(Y)BAND] or [(Z)BAND] located just right

corner on the front panel.

Push [(Y)BAND] or [(Z)BAND] to select the desired

band.

•Pushing [(Y)BAND] or [(Z)BAND] continuously scrolls

through the available bands.

•Say you want to go to 20 meters or 14 MHz; you

would push [(Y)BAND] or [(Z)BAND] several times

to select it. This will change the displayed operating

frequency to the 20-meter band.

NOTE: The band stacking register can also be

used to select bands. (Refer to p. 22)

[Y]

[Z]

Directly left of the [(Y)BAND]/[(Z)BAND] is the main

dial. This will allow you to dial in the frequency you

want to operate. You will notice the tuning speed [TS]

is 10 Hz resolution. Page 20 will instruct you on how

to set the tuning speed [TS] for 1 Hz resolution.

Adjust this control to a comfortable audio level.

AF RF/SQL

No audio output Max. audio output

Decreases Increases

2. Tune to the desired frequency

QUICK REFERENCE GUIDE

DWhat are you hearing?

Stop and focus on what you are hearing. Do you hear

a lot of noise? Is the signal intelligible? Are you set up

for the right mode? How about the ﬁlters?

1. Verify mode

Your IC-703 has many features to reduce QRM and

QRN from the desired signal.

a. Noise Reduction: The noise reduction system on

your IC-703 is part of the DSP. This is used to re-

duce the hiss and QRM levels.

qSelect S4 (DSP menu).

•Push [DISPLAY] once or twice to select S.

•Push [MENU] one or more times to select S4.

wPush [(F-2)NR] to activate the noise reduction func-

tion.

• “DSP” and “NR” appear when the function is ON.

b. Adjusting the Noise Reduction: The noise re-

duction is completely variable on how much of the

DSP Noise Reduction is used.

qPush [(F-3)NRL] to indicate the noise reduction

level.

wRotate the [M-CH] control to set the noise reduc-

tion level.

ePush [(F-3)NRL] to exit the noise reduction level

set mode.

Hint!

How far you advance the NR control will determine

how much the noise can be effectively reduced. Ad-

justing the noise reduction level too high may cause

some distortion to occur on the received signal. The

noise reduction level should only be set as high as

is necessary. Use this setting, along with RF gain,

NB (noise blanker, if needed), and IF ﬁlters as well,

to minimize the effects of noise on the target signal.

VFO A

5379

20 40

60dB

USB

BLANK

S4 LEVEL 4 NRL

DSP

[(F-3)][M-CH]

Noise reduction ON

Noise reduction OFF

VFO A

5379

20 40

60dB

USB

BLANK

S4 ANF NR NRL

DSP

[(F-2)][MENU] [DISPLAY]

Appear

Although your IC-703 will automatically select USB or

LSB in the HF bands, it will not select any of the other

modes. You will need to select the proper mode

whether CW, RTTY, AM or FM.

Hint!

The Band Stacking Register will memorize the last

frequency used in the band, as well as the Mode,

Filter, Tuner and AGC settings. This makes band

hoping much easier.

MODE

2. Reducing interference (some functions may require an optional unit depending on version)

Quick Reference

VII

QUICK REFERENCE GUIDE

c. Automatic Notch: The automatic notch will track

up to heterodynes. This is helpful for eliminating

annoying transmitter “tune up” tones on any band,

and to minimize continuous tone “heterodynes” en-

countered on the 40 meter phone bands at night,

for example. Once selected an icon will appear

“ANF” on the display.

qSelect S4.

•Push [DISPLAY] once or twice to select S.

• Push [MENU] one or more times to select S4.

wPush [(F-1)ANF] to activate the automatic notch ﬁl-

ter.

NOTE: Your IC-703 is equipped with an AGC cir-

cuit. This allows the DSP to ﬁlter out interfering sig-

nals and QRM, while also taking this interference

out of the AGC. Bottom line, this will either elimi-

nate or greatly reduce the pumping of the AGC

from the interfering signal.

Hint!

The Automatic Notch will not operate in the CW,

RTTY or SSB-D modes.

VFO A

5379

20 40

60dB

USB

BLANK

S4 ANF NR NRL

ANF

DSP

Appear

[(F-1)]

[DISPLAY][MENU]

d. Noise Blanker: The noise blanker function re-

duces pulse-type noise such as that generated by

automobile ignition systems. This function is not ef-

fective for FM modes or for non pulse-type noise.

qSelect M3.

•Push [DISPLAY] once or twice to select M.

• Push [MENU] one or more times to select M3.

wPush [(F-2)NB] to activate the noise blanker.

• “NB” appears when the function is ON.

e. Adjusting the Noise Blanker: The noise blanker

is completely variable on how much of the Noise

Blanker is used.

qPush [(F-2)NB] for 1 sec. to enter the noise blanker

level set mode.

wRotate the main dial to set the noise blanker level.

ePush [DISPLAY] to exit the noise blanker level set

mode.

Hint!

When using the noise blanker, received signals

may be distorted if the noise blanker level setting

has been too high.

USB

N1 NB LEVEL

[(F-2)] Main dial

[DISPLAY]

VFO A

5379

20 40

60dB

USB

BLANK

M3 FIL NB MET

[(F-2)][MENU] [DISPLAY]

Appears

VIII

QUICK REFERENCE GUIDE

f. Filter:

One optional ﬁlter can be installed in the IC-703.

Narrow ﬁlters help reject interference from adjacent

signals and obtain good selectivity.

Wide ﬁlters provide improved audio for SSB opera-

tion when no interfering signals are present.

Narrow ﬁlters for AM/FM modes are standard.

FILTER PRESETTING:

After you install a ﬁlter (see p. 87 for installation), you

must specify the installed ﬁlter in initial set mode (item

“22 OPT. FIL” ; see p. 79).

FILTER ON/OFF:

qSelect M3.

•Push [DISPLAY] once or twice to select M.

• Push [MENU] one or more times to select M3.

wPush [(F-1)FIL] momentarily to select the narrow

ﬁlter; push for 1 sec. to select the wide ﬁlter.

•ãappears when the narrow filter is selected; çap-

pears when the wide ﬁlter is selected.

NOTE:

When selecting the narrow ﬁlter (or wide ﬁl-

ter), the graphic passband is changed (see dia-

gram below).

VFO A

5379

20 40

60dB

USB

BLANK

M3 FIL NB MET

N W

[(F-1)]

[MENU] [DISPLAY]

Either these

appears when selected

Normal

operation

wide is

selected

narrow is

selected

We hope these pointers have been helpful. Now you

are ready for the “Ready to call CQ?”.

Quick Reference

QUICK REFERENCE GUIDE

1. Setting up your Mic Gain

Microphone gain must be adjusted properly so that

your signal does not distort when transmitted.

qSelect SSB or another phone mode (AM or FM

mode).

Push [DISPLAY] for 1 sec. to select quick set mode.

ePush [MENU] one or more times to select “Q2

MIC GAIN.”

•The ALC meter is selected automatically when operat-

ing in SSB mode.

rWhile speaking into the microphone, rotate the

main dial to adjust the microphone gain so that the

ALC meter does not peak past the ALC zone.

•While transmitting at your normal voice level, the ALC

meter should read at about the middle of the ALC zone.

• Be sure the mic gain is in the range of 2 to 5.

tPush [DISPLAY] to exit quick set mode.

ALC

ALC zone

ALC

S1 5379

20 40 60dB

USB

Q2 MIC GAIN

[MENU] Main dial

[DISPLAY]

■Ready to call CQ?

BAND

MODE

DISPLAY

LOCK

F 1 F 2 F 3

AF RF SQL

RIT

SHIFTM-CH

SUB

PHONES

TUNER

P.AMP AT T

POWER

[AF]: Max. CCW

[RF/SQL]: Center

[LOCK]: OFF

(indicator light out)

[POWER]: OFF

[SHIFT]: Center

[P.AMP/ATT]: OFF

(indicator lights out)

[TUNER]: OFF

(indicator lights out)

[RIT/SUB]: OFF

(indicator lights out)

CCW : counterclockwise

QUICK REFERENCE GUIDE

The IC-703 has a built-in, low distortion speech com-

pressor circuit. This circuit increases your average

talk power in SSB mode and is especially useful for

DX’ing when the receiving station is having difﬁculty

copying your signal.

qSelect USB or LSB mode.

wSelect the ALC meter.

• Push [DISPLAY] once or twice to select M.

•Push [MENU] one or more times to select M3, then push

[(F-3)MET] one or more times to select “ALC.”

eSelect M4.

•Push [MENU] one more time to select M4.

rPush [(F-2)COM] to turn the speech compressor

function ON.

• “COM” appears.

tPush [(F-2)COM] for 1 sec. to enter the compres-

sion level set mode (p. 54).

yRotate the main dial to set the speech compression

level.

NOTE: When the ALC meter peaks at light the ALC

zone, your transmitted voice may be distorted. Hint!

Voice patterns and audio characteristics vary with

each operator, therefore the Microphone gain,

speech compression settings will be different for

each operator. Actual on air experimenting is nec-

essary to get just the right sound. It’s best to test

and adjust your audio on the air, while someone

who knows what your real voice sounds like listens,

and provides and opinion on your audio quality.

ALC

ALC zone

ALC

S1 5379

20 40 60dB

USB

C1 COMP LEVEL

[MENU] [(F-2)]

[(F-3)]

Main dial[DISPLAY]

2. Speech compressor

Verify you have selected a clear frequency

and call out your CQ!

Quick Reference

PANEL DESCRIPTION

■Front panel

qPOWER SWITCH [POWER] (p. 17)

➥While transceiver’s power is OFF:

Push to turn power ON.

• Turn the DC power supply ON in advance.

➥While transceiver’s power is ON:

❍Push momentarily to indicate the connected

power supply voltage.

❍Push for 1 sec. to turn power OFF.

wAF GAIN CONTROL [AF] (inner control; p. 17)

Varies the audio output level from the speaker.

eRF GAIN CONTROL/SQUELCH CONTROL

[RF/SQL] (outer control; p. 24)

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 13 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 initial

set mode as follows. (p. 79)

• When setting as RF gain/squelch control

•When functioning as RF gain control

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

•When functioning as squelch control

(RF gain is ﬁxed at maximum.)

Squelch is

open.

S-meter

squelch

S-meter squelch

threshold

Noise squelch

threshold

(FM mode)

Shallow Deep

Noise squelch (FM mode)

Minimum RF gain

Adjustable

range

Maximum

RF gain

Recommended level

RF gain

adjustable

range

Maximum

RF gain

S-meter

squelch

Noise squelch (FM mode)

Squelch is

open.

MODE

SSB, CW

RTTY

AM, FM

AUTO

RF GAIN

SQL

SET MODE SETTING

SQL

RF GAIN + SQL

AF RF/SQL

No audio output Max. audio output

Decreases Increases

BAND

MODE

DISPLAY

LOCK

F 1 F 2 F 3

AF RF SQL

RIT

SHIFTM-CH

SUB

PHONES

TUNER

P.AMP AT T

POWER

VFO A

5379

20 40

60dB

USB

M1 SPL A/B XFC

qwe

rtyio

!2!3!4!5!6!7!8

PANEL DESCRIPTION

rFUNCTION DISPLAY

Shows the operating frequency, dot matrix indica-

tions, selected memory channel, etc. See p. 9 for

details.

tTUNING STEP SWITCH [TS] (pgs. 19–21)

➥While in SSB/CW/RTTY modes, push momentar-

ily to turn the programmable tuning step ON and

OFF. While in FM/AM mode push momentarily to

toggle the programmable tuning step and 1 MHz

quick tuning step.

•While the programmable tuning step indicator is dis-

played, the frequency can be changed in programmed

kHz steps.

•0.01 (FM/AM mode only), 0.1, 1, 5, 9, 10, 12.5, 20, 25

and 100 kHz tuning steps are available.

•1 MHz quick tuning step are only available in FM and

AM modes.

➥While the programmable tuning step is OFF, turns

the 1 Hz step ON and OFF when pushed for 1

sec.

•1 and 10 Hz steps are only available in SSB, CW and

RTTY modes.

•1 Hz indication appears, and the frequency can be

changed in 1 Hz steps.

➥While the programmable tuning step is ON, en-

ters the tuning step selection mode when pushed

for 1 sec.

yMODE SWITCH [MODE] (p. 23)

➥Push momentarily to cycle through the operating

modes:

USB/LSB ➧CW ➧RTTY/SSB-D ➧FM/AM

➥Push for 1 sec. to toggle the following operating

modes:

USB ↔LSB

CW ↔Memory keyer mode

RTTY↔SSB-D (SSB data mode)

FM ↔AM

uRECEIVE/TRANSMIT INDICATORS [RX]/[TX]

➥[RX]: Lights green while receiving a signal and

when squelch is open.

➥[TX]: Lights red while transmitting.

iMAIN DIAL

Changes the displayed frequency, sets the values

of selected initial set mode items, etc.

oUP/DOWN (BAND) SWITCHES [Y/Z(BAND)]

➥Push momentarily to select a band.

•Can also be used to advance or back the quick set

mode items, initial set mode items, etc.

➥Push and hold to scroll through the bands contin-

uously.

!0 MAIN DIAL TENSION LATCH

Selects the main dial tension.

• 2 positions are available.

!1 MICROPHONE CONNECTOR (p. 10)

Modular-type microphone connector—Accepts the

supplied microphone (HM-103).

•The optional OPC-589 can be used to connect an 8-pin

microphone such as the SM-8 or SM-20, if desired.

•A microphone connector is also available on the rear

panel. DO NOT connect 2 microphones simultaneously.

!2 LOCK SWITCH [LOCK]

➥Push momentarily to toggle the dial lock function

ON and OFF.

•The dial lock function electronically locks the main

dial.

➥When the optional UT-102

VOICE SYNTHESIZER

UNIT

is installed (p. 86), push for 1 sec. to have

the frequency, etc. announced.

•UT-102 operation can be adjusted in the initial set

mode (p. 82).

!3 DISPLAY SWITCH [DISPLAY] (p. 94)

➥Push momentarily to select one of the three menu

sets: M1 to M4,S1 to S4 and G1 to G4.

➥Push for 1 sec. to enter the quick set mode.

!4 MULTI-FUNCTION SWITCHES [F1] / [F2] / [F3]

➥

Push to select the function indicated in the dot ma-

trix display above these switches. (pgs. 4–6, 94)

• Functions vary depending on the menu set selected.

➥Push to edit a character for memory keyer pro-

gramming or memory name. (pgs. 35, 59)

!5 MENU SWITCH [MENU] (p. 94)

➥Push this switch one or more times to select

menus within a menu set (M,Sor G), or push to

advance through the quick set mode and initial

set mode displays.

➥Push for 1 sec. to jump between two different

function menu sets.

Lights while the lock

function is activated.

LOCK

Programmable tuning step indicator

USB

1PANEL DESCRIPTION

!6 RIT/SUB DIAL SWITCH [RIT/SUB] (pgs. 21, 47)

➥Push to toggle the RIT or SUB DIAL function ON

and OFF—initial set mode is used to select the

desired action*.

•Lights green when the SUB DIAL function is ON; lights

red when the RIT function is ON.

•Use the [M-CH] control to vary the RIT frequency or

SUB DIAL frequency (see below).

➥When the RIT function is ON, push for 1 sec. to

add or subtract the shifted frequency to the oper-

ating frequency.

*Even if RIT is selected in initial set mode, RIT cannot be se-

lected when operating AM or FM modes.

✔

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.

!7 SHIFT CONTROL [SHIFT] (outer control; p. 47)

Shifts the center frequency of the receiver’s IF pass-

band.

•Rotate the control clockwise to shift the center frequency

higher, or rotate the control counterclockwise to shift the

center frequency lower.

•When rotate the control, the IF passband is graphically

displayed and changes in accordance with the [SHIFT]

control.

!8 M-CH CONTROL [M-CH] (inner control)

➥When the RIT or SUB DIAL functions are OFF, ro-

tate to select a memory channel number (p. 56).

➥Shifts the receive frequency while the RIT func-

tion is ON in SSB, CW and RTTY modes (see

above or p. 47).

• RIT variable range is ± 9.99 kHz

➥Changes the operating frequency in the selected

tuning steps while the SUB DIAL function is ON

(p. 21).

!9 HEADPHONE JACK [PHONES] (p. 14)

Accepts headphones with 8–16 Ωimpedance.

•When headphones are connected, no receive audio

comes from the speaker.

•When the PHONES/SPEAKER switch on the back of the

front panel is set to the [SPEAKER] position, an external

speaker can be connected. This is convenient for mobile

or outdoor operation.

@0 TUNER SWITCH [TUNER] (pgs. 64–66)

➥Push momentarily to toggle the automatic an-

tenna tuner function ON and OFF (bypass).

•Lights red when the automatic antenna function is ON.

➥Push this switch for 1 sec. to manually tune the

antenna.

•When the tuner cannot tune the antenna, the tuning

circuit is bypassed automatically after 20 sec.

@1 FRONT PANEL LATCH (p. 12)

Pull away from the transceiver (towards yourself

when looking at the front of the transceiver) to de-

tach the front panel from the main body of the trans-

ceiver.

@2 PRE AMP/ATTENUATOR SWITCH [P.AMP/ATT]

(p. 46)

➥Push momentarily to turn the preamp ON or OFF.

➥Push for 1 sec. to turn the 20 dB attenuator ON;

push momentarily to turn the attenuator OFF.

•Lights green when the preamp is ON; lights red when the

20 dB attenuator is ON.

✔

What is the preamp?

The preamp ampliﬁes received signals in the front end cir-

cuit to improve the S/N ratio and sensitivity. Turn ON ‘P.AMP’

when receiving weak signals.

✔

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.

P.AMP/ATT

Lights green while the preamp is activated;

lights red while the attenuator is activated.

TUNER

Lights while the automatic

tuning function is activated.

Back of the front panel

PHONES ∫

SPEAKER √PHONES ∫

SPEAKER √

M-CH SHIFT

Decreases Increases

M-CH M-CH M-CHSHIFT SHIFT SHIFT

Shifts low Center Shifts high

RIT/

SUB

Lights red while the RIT function is activated;

green while the SUB DIAL function is activated.

PANEL DESCRIPTION

■Multi-function switches

DM1 functions

SPLIT OPERATION (p. 30)

➥Push momentarily to toggle the split func-

tion ON and OFF. (p. 51)

•“ä”appears when the split function is ON.

➥Push for 1 sec. to turn the quick split func-

tion ON. (p. 52)

•The offset frequency must be programmed in

advance using initial set mode. (p. 80)

•The offset frequency is shifted from the dis-

played frequency.

•The quick split function can be turned OFF

using initial set mode. (p. 79)

VFO A/B SELECTION

➥Push momentarily to toggle VFO A and

VFO B in VFO mode. (p. 18)

➥Push momentarily to toggle the transmis-

sion VFO and reception VFO during split

operation. (p. 51)

➥Push momentarily to toggle the transmit

and receive frequencies (and modes) of

memory channels when the split function

is turned ON.

➥Push for 1 sec. to equalize the frequency

and operatingmode of the two VFO’s.

•The rear (undisplayed) frequency and oper-

ating mode are equalized to the front (dis-

played) VFO frequency and operating mode.

TRANSMIT FREQUENCY CHECK (p. 51)

Monitors the transmit frequency when

pushed and held.

•While pushing this switch, the transmit fre-

quency can be changed with the main dial.

DM2 functions

MEMORY WRITE (p. 57)

Push for 1 sec. to store the selected read-

out frequency and operating mode into

the displayed memory channel.

MEMORY CLEAR (p. 58)

Push for 1 sec. to clear the selected read-

out memory channel contents.

•“}” appears.

•This switch does not function in VFO mode.

VFO/MEMORY

➥Push momentarily to toggle between VFO

and memory modes. (p. 56)

➥Push for 1 sec. to transfer the frequency

and operating mode in the selected mem-

ory channel to a VFO. (p. 58)

DM3 functions

FILTER SELECTION (p. 49)

Push to toggle the narrow filter (or wide

ﬁlter—push for 1 sec.) ON and OFF.

•“ã”appears when the narrow filter is ON;

“ç” appears when the wide ﬁlter is ON.

•An optional ﬁlter installation and presetting in

initial set mode (p. 79) is necessary to use

the following:

CW/RTTY narrow: FL-52A or FL-53A

SSB narrow: FL-222

SSB wide: FL-257

NOISE BLANKER (p. 48)

➥Push momentarily to toggle the noise

blanker ON and OFF.

•“NB” appears when the noise blanker func-

tion is ON.

•The noise blanker does not function in FM

mode; “30 AM NB” item (p. 80) in initial set

mode must be set to ON for the noise

blanker to work in AM mode.

➥Push for 1 sec. to enter the noise blanker

level set mode.

•The noise blanker level can be set in noise

blanker level set mode (p. 46).

F-2

F-1

FIL

F-1

FIL

F-2

F-3

MET

F-3

V/M

F-2

MCL

F-1

F-2

MCL

F-3

V/M

F-3

XFC

F-2

A/B

F-1

SPL

F-1

SPL

F-2

A/B XFC

F-3

1PANEL DESCRIPTION

METER SELECTION (p. 52)

Selects the type of meter displayed (dur-

ing transmit) in the function display.

•Power, ALC or SWR metering can be se-

lected.

•Only an S-meter is available for receive.

DM4 functions

DURING SSB/AM OPERATION:

DURING CW OPERATION:

DURING RTTY OPERATION:

DURING SSB-D OPERATION:

DURING FM OPERATION:

VOX FUNCTION (p. 53)

➥Push momentarily to toggle the VOX func-

tion ON and OFF.

•“VOX” appears when the VOX function is

ON.

➥Push for 1 sec. to enter the VOX set

mode.

•The VOX delay, VOX gain and ANTI-VOX

can be set in VOX set mode.

✔

What is the VOX function?

The VOX function (voice operated transmission) starts trans-

mission without pushing the PTT switch when you speak into

the microphone; then, automatically returns to receive when

you stop speaking.

SPEECH COMPRESSOR (p. 54)

➥Push momentarily to toggle the speech

compressor ON and OFF.

•“COM” appears when the speech compres-

sor is ON.

➥Push for 1 sec. to enter the compression

level set mode.

•The COMP gain can be set in compression

level set mode.

AGC (p. 48)

Push to change the time constant of the

AGC circuit.

•“F

AGC

” appears when the fast time constant

is selected.

1/4 FUNCTION

Push to toggle the 1/4 tuning function ON

and OFF.

•When the 1⁄4function is ON, a bar appears

under the 1⁄4indication and ﬁne tuning can be

used.

KEYER SET MODE (p. 32)

Push for 1 sec. to enter the keyer set

mode.

•The break-in setting, break-in delay time, CW

pitch, CW paddle type and dot/dash ratio can

be set in the keyer set mode.

✔

What is the break-in function?

Full break-in (QSK) activates the receiver between transmit-

ted dots and dashes. This is useful when operating in nets,

or during DX pileups and during contests, when “fast ex-

changes” are common.

RTTY TONE SET MODE (p. 40)

➥Push for 1 sec. to enter the RTTY tone set

mode.

•The RTTY tone frequency, RTTY shift fre-

quency and RTTY keying polarity can be set

in RTTY tone set mode.

FM TONE OPERATION

➥Push momentarily to select the subaudi-

ble tone encoder for repeater use, tone

squelch function and OFF. (pgs. 43–45)

•“T” appears when the repeater tone function

is ON. (pgs. 43, 45)

•“TSQL” appears when the tone squelch func-

tion is ON. (p. 43)

➥Push for 1 sec. to enter the FM tone set

mode. (p. 44)

•The repeater tone frequency, tone squelch

frequency can be set in FM tone set mode.

F-2

TON

F-2

TON

F-2

KEY

F-1

1/4

F-3

AGC

F-2

COM

F-1

VOX

F-1

VOX

F-2

TON

F-3

F-1

1/4

F-2 F-3

AGC

F-1

1/4 TON

F-2 F-3

AGC

F-1 F-2

KEY1/4

F-3

AGC

F-1

VOX

F-2

COM

F-3

AGC

F-3

MET

PANEL DESCRIPTION

DS1 functions

MEMORY WRITE (p. 57)

Push for 1 sec. to store the selected

readout frequency and operating mode

into the displayed memory channel.

MEMO PAD WRITE (p. 60)

Push to store the the selected readout

frequency and operating mode into a

memo pad.

MEMO PAD READ (p. 60)

Push to call up a memo pad.

DS2 functions

DURING VFO MODE:

DURING MEMORY MODE:

SCAN (pgs. 61–63)

Push to start or stop the scan function.

PRIORITY WATCH (p. 63)

Push to start or stop the priority watch.

VFO/MEMORY

➥Push momentarily to toggle between VFO

and memory modes. (p. 56)

➥Push for 1 sec. to transfer the frequency

and operating mode in the selected mem-

ory channel to a VFO. (p. 58)

SELECT SCAN (p. 61)

Push to toggle the select setting ON and

OFF for the selected memory channel.

DS3 functions

QUICK BAND CHANGE FUNCTION (p. 22)

This item provides access to the band stacking regis-

ter. By default the 7, 14 and 21 MHz bands are dis-

played. Push [F-1], [F-2] or [F-3] for 1 sec. to select a

new band if desired.

•A mode is memorized along with the frequency for each

band.

DS4 functions

(UT-106 is required for some version)

AUTOMATIC NOTCH FILTER (p. 50)

This function automatically attenuates

beat tones, tuning signals, etc., even if

they are moving.

NOISE REDUCTION (p. 50)

This function reduces noise components

and picks out desired signals which are

buried in the noise.

NOISE REDUCTION LEVEL DISPLAY (p. 50)

This switch displays the noise reduction

level when pushed.

F-3

NRL

F-2

F-1

ANF

F-1

ANF

F-2

F-3

NRL

F-1

F-2

F-3

F-2

SEL

F-3

V/M

F-2

PRI

F-1

SCN

F-1

SCN

F-2

SEL

F-3

V/M

F-1

SCN

F-2

PRI

F-3

V/M

F-3

MPR

F-2

MPW

F-1

F-2

MPW

F-3

MPR

1PANEL DESCRIPTION

■Rear panel

qANTENNA CONNECTOR [ANT] (p. 13)

Accepts a 50 Ωantenna with a PL-259 connector.

wGROUND TERMINAL [GND] (p. 11)

Connect this terminal to a ground to prevent electri-

cal shocks, TVI, BCI and other problems.

eDATA SOCKET [DATA] (pgs. 8, 14)

6-pin min DIN socket to connect a TNC (Terminal

Node Controller), etc. for packet operation.

•See page at right for socket information.

rACCESSORY SOCKET [ACC] (pgs. 8, 14)

Enables connection to external equipment such as a

TNC for data communications, a linear ampliﬁer or

an automatic antenna selector/tuner, etc.

•See page at right for socket information.

tEXTERNAL SPEAKER JACK [EXT SP] (p. 14)

Accepts a 4–8 Ωspeaker.

CI-V REMOTE CONTROL JACK [REMOTE] (p. 71)

➥Designed for use with a personal computer for re-

mote control of the transceiver functions.

➥Used for transceiver operation with another Icom

CI-V transceiver or receiver.

uMICROPHONE CONNECTOR [MIC] (p. 13)

Accepts the supplied microphone (connected in par-

allel with the front panel’s [MIC] connector).

•See p. 2 for microphone notes.

•See p. 10 for microphone connector information.

iELECTRONIC KEYER JACK [KEY] (p. 28)

Accepts a paddle to activate the internal electronic

keyer.

•Selection between the internal electronic keyer and

straight key operation can be made in keyer set mode.

(p. 32)

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.

oTUNER CONTROL SOCKET [TUNER] (p. 14)

Accepts the control cable from an optional AH-4

/50

AUTOMATIC ANTENNA TUNER

!0 DC POWER SOCKET [DC13.8V] (p. 15)

Accepts 9.0–15.87 V DC through the supplied DC

power cable.

NOTE: DO NOT use a cigarette lighter socket as a

power source when operating in a vehicle. The plug

may cause voltage drops and ignition noise may be

superimposed onto transmit or receive audio.

When connecting

a straight key

When connecting

a paddle

(dot)

(com)

(dash)

(⊕)

e t y u i

PANEL DESCRIPTION

DDATA socket

DACC socket

ACC

PIN No.

NAME DESCRIPTION SPECIFICATIONS

1234

8765

101112

Rear panel view

qbrown igray

wred owhite

eorange !0 black

ryellow !1 pink

tgreen !2 light

blue

yblue

upurple !3 light

green

1 8 V Regulated 8 V output. Output voltage : 8 V ±0.3 V

Output current : Less than 10 mA

2 GND Connects to ground. ———

Input/output pin. (HF/50 MHz only) Ground level : –0.5 V to 0.8 V

HSEND

Goes to ground when transmitting. Output current : Less than 20 mA

When grounded, transmits. Input current (Tx) : Less than 200 mA

4 BDT Data line for the optional AT-180. ———

5 BAND Band voltage output. Output voltage : 0 to 8.0 V

(Varies with amateur band)

6 ALC ALC voltage input. Control voltage : –4 V to 0 V

Input impedance : More than 10 kΩ

7 NC ——— ———

8 13.8 V 13.8 V output when power is ON. Output current : Max. 1 A

9 TKEY Key line for the optional AT-180. ———

“High” level : More than 2.4 V

10 FSKK Controls RTTY keying “Low” level : Less than 0.6 V

Output current : Less than 2 mA

11 MOD Modulator input. Input impedance : 10 kΩ

Connects to a modulator. Input level : Approx. 100 mV rms

AF detector output. Output impedance : 4.7 kΩ

12 AF Fixed, regardless of [AF] position in Output level : 100–300 mV rms

default settings.

13 SQLS Squelch output. SQL open : Less than 0.3 V/5 mA

Goes to ground when squelch opens.

SQL closed : More than 6.0 V/100 µA

DATA

PIN No.

NAME DESCRIPTION

Rear panel view

1 DATA IN Input terminal for data transmit. (1200 bps: AFSK/9600 bps: G3RUH, GMSK)

2 GND Common ground for DATA IN, DATA OUT and AF OUT.

3 PTT P PTT terminal for packet operation. Connect ground to transmit data.

4 DATA OUT Data out terminal for 9600 bps operation only.

5 AF OUT Data out terminal for 1200 bps operation only.

Squelch out terminal. Becomes ground level when the transceiver receives a signal

which opens the squelch.

6SQ •To avoid unnecessary TNC transmission, connect squelch to the TNC to inhibit trans-

mission when receiving signals.

• Keep audio output at a normal level, otherwise a “SQ

”

signal will not be output.

Color refers to the cable strands of the supplied cable.

ACC 1 ACC 2

q FSKK t AF

w GND y SQLS

e HSEND u 13.8 V

r MOD i ALC

q 8 V t ALC

w GND y VSEND

e HSEND u 13.8 V

r BAND

1234

765

101112

Connect to ACC socket

• When connecting the ACC conversion cable (OPC-599)

1PANEL DESCRIPTION

■Function display

qNARROW/WIDE FILTER INDICATORS

➥“ã” appears when selecting AM narrow or FM

narrow modes.

➥When installing an optional narrow ﬁlter, narrow

mode can be selected in CW, RTTY and SSB

modes.

•When the SSB wide filter is installed, “ç” appears

during wide mode selection.

wMODE INDICATORS

Show the selected operating mode.

•“å” appears when CW reverse or RTTY reverse mode is

selected.

eSPLIT INDICATOR

Appears during split operation.

rPROGRAMMABLE/1 MHz TUNING STEP

INDICATORS

➥ra appears when the programmable tuning step

is selected.

➥rb appears when the 1 MHz quick tuning step is

selected.

tFREQUENCY READOUT

Shows the operating frequency.

yBLANK MEMORY INDICATOR

Appears when the displayed memory channel is not

programmed (blank channel).

• This indicator appears both in VFO and memory modes.

uVFO/MEMORY INDICATORS

➥VFO A or B appears when VFO mode is selected;

MEMO appears when memory mode is selected.

iSELECT MEMORY CHANNEL INDICATOR

Appears when the selected memory channel is set

as a select memory channel.

oMEMORY CHANNEL READOUT

Shows the selected memory channel.

!0 DOT MATRIX INDICATORS

These alphanumeric readouts show a variety of in-

formation such as current functions of the “F” keys

[F1] to [F3], memory channel names, set mode

items, etc. See p. 94 for an overview of these indi-

cators.

!1 METER READOUTS

➥Shows receiving signal strength while receiving.

➥Shows one of transmit power meter, ALC or SWR

meter while transmitting.

!2 FUNCTION INDICATORS

➥“NB” appears when the noise blanker is activated.

➥“VOX” appears when the VOX function is se-

lected.

➥“F-BK” appears when full break-in operation is se-

lected and only “BK” appears when semi break-

in operation is selected.

➥“COM” appears when the speech compressor is

activated.

➥“FAGC” appears when the fast AGC function is se-

lected.

!3 DSP INDICATORS

Appear when the (optional*) DSP unit UT-106 is (in-

stalled and) activated.

* UT-106 DSP unit is optional for some version.

N W R

LSB

NB VOX F-BK COM F

VFO A

VFO B

MEMO

AGC

ALC

SWR P

1 1.5 2 3 5

5379

20 40

60dB

USB CW R

AM FM TSQL

SPL

∞

ANF

BLANK

DSP

M1 SPL A/B XFC

PANEL DESCRIPTION

• MICROPHONE CONNECTOR

■Microphone (HM-103)

qUP/DOWN SWITCHES [UP]/[DN]

Change the operating frequency.

•Push and hold to change the frequency continuously.

•Tuning step is 50 Hz when no TS indicator appears.

wLOCK SWITCH [LOCK]

Locks the [UP]/[DN] switches.

ePTT SWITCH [PTT]

Push and hold to transmit; release to receive.

DN UP

LOCK

OFF ON

TECHNICAL INFORMATION

PIN NO. FUNCTION DESCRIPTION

1+8 V DC output Max. 10 mA

2Frequency up Ground

Frequency down Ground through 470 Ω

8Squelch open “LOW” level

Squelch closed “HIGH” level

r PTT

y Microphone input

w Frequency up/down

u GND

q +8 V DC output

i Squelch switch

t GND (Microphone ground)

e AF output

Rear panel view

12345678

• HM-103 SCHEMATIC DIAGRAM

4700p

10µ0.33µ+

MICROPHONE

MIC

ELEMENT

2.2k

470

DOWN

LOCK UP

PTT RECEIVE

TRANSMIT

MICROPHONE

CABLE

MICROPHONE PLUG

12345678

CAUTION:DO NOT short pin 1 to ground as

this can damage the internal 8 V regulator.

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-703, see ‘Supplied acces-

sories’ on p. ii 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 electromagnetic 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. (see description

at right page)

■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] ter-

minal to a gas or electric pipe, since the connection

could cause an explosion or electric shock.

■Antenna connection

For radio communications, the antenna is of critical 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.

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-

tors. 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-703 has an SWR meter to monitor the

antenna SWR continuously.

30 mm

10 mm (soft solder)

10 mm

1–2 mm

solder solder

Soft

solder

Coupling ring

PL-259 CONNECTOR INSTALLATION EXAMPLE

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.

INSTALLATION AND CONNECTIONS

To raise the stand:

With the transceiver upside down, pull the stand to-

wards the rear panel and then upwards, as illus-

trated below.

■Installation

DSingle body mounting DStand

Nut

Spring washer

Flat washer

*CAUTION: Non-supplied screws (longer than 8 mm)

may damage the internal units.

MB-62

(optional)

Supplied with

the MB-62*

Pull back

then up

DFront panel separation

DFront panel mounting

qWhile pulling the panel release button towards you,

slide the front panel to the right (ﬁg. 1).

wAttach the optional OPC-581 to the main body and

tighten the supplied screw as in ﬁg. 2.

eAttach the other end of the OPC-581 to the de-

tached front panel as in ﬁg. 3.

CAUTION: NEVER detach/attach the front panel

when connecting the DC power supply (or battery).

Make sure the disconnecting DC power cable from

the [13.8 V] receptacle on the transceiver rear

panel.

qAttach the MB-63 to a flat surface using the two

supplied screws (ﬁg. 1).

wFix the detached front panel to the MB-63 as illus-

trated in ﬁg. 2.

BE CAREFUL of the orientation of the MB-63, oth-

erwise, the front panel may become attached in the

opposite direction.

fig. 1 fig. 2 fig. 3

Latch Separation cable

Separation cable

fig. 1

fig. 2

2INSTALLATION AND CONNECTIONS

■Required connections

BAND

MODE

DISPLAY

LOCK

F 1 F 2 F 3

AF RF SQL

RIT

SHIFTM-CH

SUB

PHONES

TUNER

P.AMP ATT

POWER

MICROPHONE (p. 10)

HF/50 MHz ANTENNA

GROUND (p. 11)

HM-103

CW KEY (p. 28)

Use the heaviest gauge wire or

strap available and make the

connection as short as possible.

Grounding prevents electrical

shocks, TVI and other problems.

Connects to DC 9.0–15.8 V

power supply. See p. 15 for

details.

INSTALLATION AND CONNECTIONS

■Advanced connections

BAND

MODE

DISPLAY

LOCK

F 1 F 2 F 3

AF RF SQL

RIT

SHIFTM-CH

SUB

PHONES

TUNER

P.AMP ATT

POWER

OPC-589 (p. 92)

DESKTOP (p. 91)

MICROPHONE

Selectable with the [PHONE/SPEAKER] switch

on the back of the front panel.

SPEAKER

ACC SOCKET (p. 8)

DATA SOCKET (p. 8)

6-pin mini DIN socket to connect to a

TNC, etc. for packet operation.

AH-4 (p. 16)

AH-2b

EXTERNAL

SPEAKER (p. 91)

HEADPHONES

SP-7/SP-10

SM-20

REMOTE (p. 71)

Used for computer control

and transceive operation.

Use a 13.8 V DC power supply with at least 3 A ca-

pacity. when operating IC-703 with AC power. Refer

to the diagram below for connection.

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 9.0–15.8 V

when you use a non-Icom power supply.

•DC power cable polarity is correct.

Red: positive (+) terminal,

Black: negative (–) terminal

■DC Power supply connections

2INSTALLATION AND CONNECTIONS

■Battery connections

■DC Power voltage

Depending on the applied voltage from the connected

power supply, a boarder voltage of 11.0 V is set as the

point where the IC-703 switches between normal op-

erating mode (over 11.0 V), and battery operating

mode (under 11.0 V: power save mode).

However when the connected voltage decreases from

13.8 V to 11.0V, the IC-703 switches from normal

mode to battery mode. Conversely the IC-703

switches back to normal mode from battery mode

when the voltage reaches 11.5 V. This 0.5 V voltage

difference prevents irregular switching between nor-

mal mode and battery mode, caused by the voltage

drop which are current capacity, receiving or transmit-

ting.

When 11.3 V voltage is applied, the IC-703 may acti-

vate the battery operating mode depending on the

current capacity of the power supply.

AC cable

outlet

A DC power

supply*

*13.8 V; at least 3.0 A

continuous

Black

_ Red

CONNECTING A DC POWER SUPPLYCONNECTING PS-125 DC POWER SUPPLY

PS-125

DC power cable

Ground

4 A fuses

Transceiver

to DC power

receptacle Supplied

OPC-1229

Optional

OPC-1248

Connect to an AC

outlet using the

supplied AC cable.

•RWARNING NEVER connect to a battery

without supplied DC fuse, otherwise a ﬁre hazard

occur.

•NEVER connect the transceiver directly to a

24 V battery.

•DO NOT use the cigarette lighter socket for power

connections. (See p. 7 for details)

•Attach a rubber grommet when passing the DC

power cable through a metal plate to prevent a

short circuit.

Grommet

CONNECTING A VEHICLE BATTERY

Note: Use terminals for

the cable connections.

Crimp

Solder

Supplied

DC power cable

red

black

12 V

battery

INSTALLATION AND CONNECTIONS

■External antenna tuners and linear ampliﬁer

GroundGround

Long wire or optional AH-2b

AH-4

ANT

IC-703

Coaxial cable

(from the AH-4)

CONNECTING THE AH-4

IC-703

Ground Ground

AT-180

CONNECTING THE AT-180

to 6 m

antenna

[TRANSCEIVER]

[ANT]

[ACC] [ACC]

ACC cable supplied with the AT-180

Coaxial cable supplied

with the AT-180

one of two

connectors

Note:

Turn the IC-703’s power OFF when connecting

the AT-180, otherwise, the CPU may malfunction

and the AT-180 may not function properly.

CONNECTING A NON-ICOM LINEAR AMPLIFIER

RWARNING:

•

Set the transceiver output power and linear ampli-

ﬁer ALC output level referring to the linear ampliﬁer

instruction manual. Be sure the linear ampliﬁer key-

ing circuit control voltage is compatible with the IC-

703, before connecting to HSEND line (ACC cable).

•The ALC input level must be in the range 0 V to

–4 V, and the transceiver does not accept positive

voltage. Non-matched ALC and RF power settings

could cause a ﬁre or damage the linear ampliﬁer.

•The specifications for the SEND relay are 16 V

DC 0.5 A. If this level is exceeded, a large external

relay must be used.

HSEND

(Orange)

ALC (Blue)

13.8V (Gray)

Ground

Relay

RF INRF OUT

ALC

SEND

ANT

ACC cable

ACC

IC-703

50 Ω coaxial cable

To an

antenna

BASIC OPERATION

■When ﬁrst applying power (CPU resetting)

Before ﬁrst applying power, make sure all connections

required for your system are complete by referring to

Chapter 2. Then, reset the transceiver using the fol-

lowing procedure.

Resetting CLEARS all programmed contents in

memory channels and returns all initial set mode and

quick set mode contents to their default values.

qMake sure the transceiver power is OFF.

wWhile pushing [Y] and [Z], push [POWER] to turn

power ON.

•“CLEAR ? OK” appears as shown at right.

eThen push [F-3] for 1 sec to start resetting.

• The internal CPU is reset.

•The display changes to ‘All indication,’ ‘RF power,’ ‘Power

supply voltage’ and ‘Initial frequency and Mode’ as shown

at right.

DM1 display selection

If you can’t ﬁgure out how to return to the M1 display:

While pushing [MENU], turn power ON.

■Initial settings

After resetting the transceiver, set controls and

switches as shown in the diagram below.

[POWER]

[Y]

[Z]

CLEAR ? OK

F 3

Push [F-3]

for 1 sec.

N W R

LSB

NB VOX F-BK COM F

VFO A

DUP

VFO B

MEMO

AGC

ALC

SWR P

11.52 35

5379

20 40

60dB

USB CW R

AM WFM TSQL

SPL

∞

ANF

BLANK

DSP

VFO A

5379

20 40

60dB

USB

BLANK

M1 SPL A/B XFC DC SUPPLY

RF POWER

The transceiver’s

initial frequency and mode

BAND

MODE

DISPLAY

LOCK

F 1 F 2 F 3

AF RF SQL

RIT

SHIFTM-CH

SUB

PHONES

TUNER

P.AMP AT T

POWER

[AF]: Max. CCW

[RF/SQL]: Center

[LOCK]: OFF

(indicator light out)

[POWER]: OFF

[SHIFT]: Center

[P.AMP/ATT]: OFF

(indicator lights out)

[TUNER]: OFF

(indicator lights out)

[RIT/SUB]: OFF

(indicator lights out)

CCW : counterclockwise

Turn power ON, then check the display. If any of the

following indicators appear, turn them OFF as follows:

•Tuning step indicators,

, (SSB, CW or RTTY):

Push [TS].

•MHz tuning step indicator,

, (FM or AM):

Push [TS].

• 1 Hz frequency readout (SSB, CW or RTTY):

Push and hold [TS].

• Memory mode indicator, MEMO:

Use [(F-3)V/M] in the M2 display (p. 75).

• Split indicator, ä:

Use [(F-1)SPL] in the M1 display (p. 75).

BASIC OPERATION

■VFO description

VFO is an abbreviation of Variable Frequency Oscilla-

tor, and traditionally refers to an oscillator. The IC-703’s

VFO can store a frequency and an operating mode.

You can call up a desired frequency to a VFO with the

memo pad-read switch (p. 60) or with the memory

transfer switch (p. 58). You can also change the fre-

quency with the main dial and select an operating

mode with the [MODE] switch or call up previously ac-

cessed frequency and modes with the band stacking

The IC-703 has two VFOs, specially suited for split fre-

quency operation. The VFOs are called VFO A and

VFO B. You can use the desired VFO to call up a fre-

quency and operating mode for operation.

VFO A

USB

M1 SPL A/B XFC

VFO MODE

SWITCH

MEMORY

CHANNEL

DIAL

MEMO PAD

28.025 MHz 7.001 MHz

21.295 MHz

BAND

Select

Change

Transfer

DThe differences between VFO and memory mode

VFO MODE

Each VFO shows a frequency and operating mode. If

the frequency or operating mode is changed, the VFO

automatically memorizes the new frequency or oper-

ating mode.

When the VFO is selected from another VFO or

memory mode, the last-used frequency and operat-

ing mode for that VFO appear.

[EXAMPLE]

MEMORY MODE (pgs. 56–60)

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 a memory channel is selected from another

memory channel or VFO mode, the memorized fre-

quency and operating mode appear.

[EXAMPLE]

VFO A

USB

VFO A

USB

VFO is selected.

The frequency is changed.

MEMO

VFO A

USB VFO is selected again.

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

memorised frequency (14.100 MHz) appears instead.

USB Memory mode is selected.

USB

Memory channel 1 is

selected.

The frequency is changed.

MEMO

USB Memory channel 1 is

selected again.

USB Another memory channel

is selected.

3BASIC OPERATION

• Programmable tuning steps

Programmable tuning steps are available to suit your

operating requirements.

These tuning steps are:

• Independently selectable for each mode

•Selectable from 0.01 (FM/AM only), 0.1, 1, 5, 9, 10,

12.5, 20, 25 and 100 kHz

qPush [TS] one or more times until the programma-

ble tuning step indicator “

” appears above the 1

kHz digit.

•Rotating the main dial changes the frequency according

to the set tuning step.

wPush [TS] for 1 sec. while the programmable tuning

step indicator appears to enter the tuning step se-

lection mode.

•“Rotate DIAL” appears.

eRotate the main dial to set the desired tuning step.

•Change the mode and select tuning steps for other

modes, if desired.

rPush [TS] to exit the tuning step selection mode.

tRotate the main dial to change the frequency ac-

cording to the set tuning step.

• Band selection

All HF ham bands, the 50 MHz band and a general

coverage receiver band are included in the IC-703.

Push [(Y)BAND]/[(Z)BAND] to select the desired

band.

•Pushing [(Y)BAND]/[(Z)BAND] continuously scrolls

through the available bands.

The band stacking register can also be used to se-

lect bands. Refer to p. 22.

USB

LSB

■Frequency setting

Programmable tuning

step indicator

10 kHz tuning step is

selected for USB

operation.

VFO A

53792040

60dB

USB

M1 A/B XFC

DIAL

SPL

Rotate

[Y]

[Z]

[TS] Main dial

BASIC OPERATION

• 1 Hz and 10 Hz tuning steps

When neither the quick tuning step or programmable

tuning step “

” appear, rotating the main dial

changes the frequency in increments of 1 or 10 Hz.

These tuning steps are only available in SSB, CW

and RTTY modes.

qSelect SSB, CW or RTTY mode if necessary.

wPush [TS] for 1 sec. to toggle between the 1 Hz

and 10 Hz step settings.

•When the 1 Hz step is selected, the 1 Hz digit appears

in the frequency indication; when the 10 Hz step is se-

lected, the 1 Hz digit disappears from the frequency in-

dication.

•Rotating the main dial changes the frequency 1 Hz or

10Hz tuning step.

Rotating the main dial

changes the frequency

in 10 Hz steps.

Rotating the main dial

changes the frequency

in 1 Hz steps.

Push for 1 sec.

VFO A

USB

VFO A

USB

[TS]

[MODE]

Main dial

• 1 MHz quick tuning step

The quick tuning step function allows you to change

the frequency in 1 MHz steps when rotating the main

dial. This function is only available in FM and AM

modes.

qSelect FM or AM mode if necessary.

wPush [TS] momentarily to toggle between the 1

MHz tuning step and the programmable tuning

step.

•“

” appears above the 1 MHz indicator when the 1

MHz tuning step is selected.

•Rotating the main dial changes the frequency 1 MHz or

set tuning step.

Quick tuning step

indicator

Rotating the main dial

changes the frequency

in 1 MHz steps.

[TS]

[MODE]

Main dial

3BASIC OPERATION

• Sub dial function

The sub dial function allows you to change the oper-

ating frequency using the [M-CH] control. This gives

you more control in tuning since the [M-CH] knob is

detented—each click changes the frequency accord-

ing to the set tuning step. This function is always

available in FM and AM modes. However, in SSB,

CW and RTTY modes, the initial set mode item “21

SUB DIAL” (p.61), must be set to “FrEq.”

qPush [RIT/SUB] to turn the sub dial function ON.

•The [SUB] indicator lights green; if it lights red, the RIT

function is activated—sub dial function must be set in

initial set mode in this case.

wRotate [M-CH] to change the operating frequency

according to the set tuning step.

ePush [RIT/SUB] again to turn the function OFF.

• The [SUB] indicator turns off.

[RIT/SUB][M-CH]

RIT/

SUB Indicator lights green

while the sub dial

function is activated.

• [TS] switch flow chart

SSB/CW/RTTY modes Any mode FM/AM modes

USB

10 Hz tuning

USB

1 Hz tuning

momentarily momentarily

momentarily

1 sec.1 sec.

1 sec.

TSTS

1 MHz tuning

USB

Programmable step tuning

(100 Hz –100 kHz)

Selectable for each mode.

USB

Rotate DIAL

Appears

AppearsAppears

BASIC OPERATION

• Quick band change function

The quick band change function automatically stores

the last frequency and mode used for each band in a

band stacking register. This is convenient for contest

operation, etc. The tables below show the quick band

change default settings for each band.

qSelect S3.

• Push [DISPLAY] once or twice to select S.

• Push [MENU] one or more times to select S3.

wPush [F-1], [F-2] or [F-3] to select a band stacking

•The default settings for [F-1], [F-2], [F-3] are 7, 14, 21

MHz bands, respectively.

eTo change the settings for [F-1], [F-2] or [F-3] from

their defaults, push [F-1], [F-2] or [F-3] for 1 sec.

one or more times to until the desired band ap-

pears in the display above the corresponding

switch.

•The last-used frequency and mode for the selected

band are displayed.

*11.83000 MHz for Italy version (#10, #20).

*250 MHz band is not available for some version.

*3General refers to the general coverage receiver (GEN in

the display) and the range varies according to version.

BLANK

VFO A

S1 5379204060dB

USB

S3 7GEN 21

510

Display shows [F-2]

has been changed

from its default of the

14 MHz band to the

general receiver band.

BLANK

VFO A

S1 5379204060dB

USB

S3 7 14 21

510

Display shows the

default bands for the

quick band change

function.

[DISPLAY][F-2][MENU]

[F-3][F-1]

BAND FREQUENCY MODE

1.9 MHz 1.90000 MHz*1CW

3.5 MHz 3.55000 MHz LSB

7 MHz 7.05000 MHz LSB

10 MHz 10.12000 MHz CW

14 MHz 14.10000 MHz USB

18 MHz 18.10000 MHz USB

21 MHz 21.20000 MHz USB

24 MHz 24.95000 MHz USB

28 MHz 28.50000 MHz USB

50 MHz*250.10000 MHz USB

General*315.00000 MHz USB

■Volume setting

3BASIC OPERATION

■Operating mode selection

The following modes are available in the IC-703:

SSB (LSB/USB), CW, CW-å(CW reverse), RTTY

and åRTTY (RTTY reverse), FM, AM.

•SSB (LSB/USB), CW, RTTY, SSB-D, FM and

AM modes selection

To select the desired mode of operation, push

[MODE] one or more times, then push [MODE] for 1

sec., if necessary. See the diagram at right for the

order of selection.

• The selected mode is indicated in the function display.

•CW-å(CW reverse) mode selection

qWhen selecting CW mode, push [DISPLAY] for 1

sec. to enter quick set mode.

wPush [MENU] one or more times to select item “Q3

CW REV” during CW mode.

•[Y]/[Z] or [M-CH] can also be used.

eRotate the main dial to select CW reverse.

rPush [DISPLAY] to exit quick set mode.

•“CW-å” appears.

•åRTTY (RTTY reverse) mode selection

qWhen selecting RTTY mode, push [DISPLAY] for 1

sec. to enter quick set mode.

wPush [MENU] one or more times to select item “Q2

RTTY REV” during RTTY mode.

•[Y]/[Z] or [M-CH] can also be used.

eRotate the main dial to select RTTY reverse.

rPush [DISPLAY] to exit quick set mode.

•“åRTTY” appears.

Note:If a desired mode cannot be selected, it may be

hidden using initial set mode (p. 76).

[DISPLAY]

[MODE]

[MENU][M-CH]

[Y]

[Z]

OPERATING MODE SELECTION

MODE

Push

momentarily

Memory keyer

set mode

MODE

Push

for 1 sec.

USB LSB

FM AM

SSB-D

RTTY

[MODE]

Rotate [AF] control to output a suitable audio level.

[AF]

AF RF/SQL

No audio output Max. audio output

Decreases Increases

BASIC OPERATION

■Squelch and receive (RF) sensitivity

Adjusts the RF gain and squelch threshold level. The

squelch removes noise output from the speaker

(closed position) when no signal is received.

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

available for other modes.

•The control can be set as the RF gain control only

(squelch is ﬁxed open) or squelch control (RF gain is ﬁxed

at maximum) in initial set mode (p. 79). See below right.

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

ting of the [RF/SQL] control.

Adjusting RF gain (Receive sensitivity)

Normally, [RF/SQL] is set to the 11 o’clock position.

Rotate [RF/SQL] to the 11 o’clock position for maxi-

mum sensitivity.

• Rotating counterclockwise from the maximum position re-

duces sensitivity.

• The S-meter indicates receive sensitivity.

Adjusting squelch (Removing non-signal noise)

Rotate [RF/SQL] clockwise when receiving no signal,

until the noise just disappears.

• [RX] indicator light goes out.

• Rotating [RF/SQL] past the threshold point invokes the S-

meter squelch— this allows you to set a minimum signal

level needed to open the squelch.

• When setting as RF gain/squelch control

•When functioning as RF gain control (Squelch is

ﬁxed open; SSB, CW, RTTY only)

•When functioning as squelch control (RF gain is

ﬁxed at maximum)

Squelch is

open.

S-meter

squelch

S-meter squelch

threshold

Noise squelch

threshold

(FM mode)

Shallow Deep

Noise squelch (FM mode)

Minimum RF gain

Adjustable

range

Maximum

RF gain

Recommended level

RF gain

adjustable

range

Maximum

RF gain

S-meter

squelch

Noise squelch (FM mode)

Squelch is

open.

[RF/SQL]

SET MODE OPERATION

RF+SQL

Can be used in all modes.

(default)

Functions as noise squelch or S-meter

squelch in AM and FM modes; S-

meter squelch only in other modes.

SQL Operates as a squelch control.

• RF gain is ﬁxed at maximum sensitivity.

Operates as an RF gain control in

SSB, CW and RTTY modes.

AUTO •Squelch is ﬁxed open.

Operates as a squelch control in AM

and FM modes.

• RF gain is ﬁxed at maximum sensitivity.

■Basic transmit operation

DTransmitting

3BASIC OPERATION

qPush [PTT] (microphone) to transmit.

• The [TX] indicator lights red.

wRelease [PTT] (microphone) to return to receive.

[PTT]

HM-103

Before transmitting, monitor your selected op-

erating frequency to make sure transmitting

won’t cause interference to other stations on

the same frequency. It’s good Amateur practice

to listen ﬁrst, and then, even if nothing is heard,

ask “is the frequency in use” once or twice, be-

fore you begin operating on that frequency.

■Dial lock function

The dial lock function prevents accidental changes

caused by the tuning dial.

➥Push [LOCK] to turn the dial lock function ON and

OFF.

•“LOCK” indicator lights while the dial lock function is

activated.

Lights while the dial lock function is activated.

[LOCK]

DMaximum output power

Push [POWER] for 1 sec. to turn power OFF.

wWhile pushing [LOCK], push [POWER] to turn

power ON and enter initial set mode.

ePush [MENU] one or more times to select “1 MAX

POWSET,” if necessary.

• [M-CH] or [Y]/[Z] can also be used.

rRotate the main dial to select the desired maximum

output power.

•Maximum output power is selectable “0.5,” “1,” “2.5,” “5”

or “10.”

•Default setting is “10.”

tPush [POWER] to turn power OFF, and ON again.

1 MAX POWSET

[M-CH] [LOCK][MENU]

[POWER]

[Y]

[Z]

BASIC OPERATION

Push [DISPLAY] for 1 sec. to select quick set mode.

wPush [MENU] one or more times to select “Q1 RF

POWER.”

eRotate the main dial to select the desired output.

•Output power is displayed in 11 steps (L, 1–9 and H)

but is continuously selectable.

rPush [DISPLAY] to exit quick set mode.

•Available power

*Carrier power

5379

20 40

60dB

USB

Q1 RF POWER

Maximum output

power is selected.

[DISPLAY]

Main dial

[MENU]

DSetting output power

Microphone gain must be adjusted properly so that

your signal does not distort when transmitted.

qSelect SSB or another phone mode (AM or FM

mode).

Push [DISPLAY] for 1 sec. to select quick set mode.

ePush [MENU] one or more times to select “Q2

MIC GAIN.”

•The ALC meter is selected automatically when operat-

ing in SSB mode.

rWhile speaking into the microphone adjust the mi-

crophone gain so that the ALC meter does not

peak past the ALC zone.

tPush [DISPLAY] to exit quick set mode.

ALC

ALC zone

ALC

S1 5379

20 40 60dB

USB

Q2 MIC GAIN

Microphone gain

is set to 5.

[DISPLAY]

Main dial

[MENU]

DSetting microphone gain

QUICK SET MODE

Power supply

SSB/CW AM*

voltage

RTTY/FM

13.8 V 0.1–10 W 0.1–4 W

(DC power mode)

9.6 V 0.1–5 W 0.1–2 W

(Battery mode)

QUICK SET MODE

DConvenient functions for receive

DConvenient functions for transmit

RECEIVE AND TRANSMIT

■Operating SSB

qPush [(Y)BAND]/[(Z)BAND] to select the desired

band.

wPush [MODE] momentarily or push for 1 sec. to se-

lect LSB or USB mode.

•Below 10 MHz LSB is automatically selected; above

10 MHz USB is automatically selected.

eRotate [AF] control to set audio to a comfortable lis-

tening level.

rRotate the main dial to tune a desired signal.

• S-meter indicates received signal strength.

tPush [PTT] (microphone) to transmit.

• The TX indicator lights red.

ySpeak into the microphone at your normal voice

level.

• Adjust ‘MIC GAIN’ at this step, if necessary. (p. 26)

uRelease [PTT] (microphone) to return to receive.

LSB

VFO A

5379

20 40

60dB

USB CW R

AM WFM

M1 SPL A/B XFC

[TX] indicator [MODE]

Main dial

[AF]

[Y]

[Z]

“LSB” or “USB” appears

• Preamp and attenuator (p. 46)

➥Push [P.AMP/ATT] momentarily to set the preamp

ON or OFF.

•Lights green when the preamp is set to ON.

➥Push [P.AMP/ATT] for 1 sec. to set the attenuator

ON.

•Push [P.AMP/ATT] momentarily to turn the attenua-

tor OFF.

• Lights red when the attenuator is set to ON.

• Noise blanker (p. 48)

➥While “M3” is selected, push [(F-2)NB] to turn the

noise blanker ON and OFF.

•Push [DISPLAY] once or twice to select M.

•Push [MENU] one or more times to select M3.

• “NB” appears when the noise blanker is set to ON.

•Push [(F-2)NB] for 1 sec. to enter the noise blanker

set mode.

• IF shift (p. 47)

➥Rotate [SHIFT] control.

• AGC (auto gain control) (p. 48)

➥While “M4” is selected, push [(F-3)AGC] to select

AGC fast and AGC slow.

•Push [DISPLAY] once or twice to select M.

•Push [MENU] one or more times to select M4.

•“F

AGC

” appears when the fast time constant is se-

lected.

• Noise reduction (p. 50)

➥While “S4” is selected,

push [(F-2)NR] to turn the

noise reduction ON and OFF.

•Push [DISPLAY] once or twice to select S.

•Push [MENU] one or more times to select S4.

•Push [(F-3)NRL] then rotate [M-CH] to adjust the

noise reduction level.

• “NR” appears when the noise reduction is set to ON.

• Auto notch ﬁlter (p. 50)

➥While “S4” is selected,

push [(F-1)ANF] to turn th

auto notch ﬁlter function ON and OFF.

•“ANF” appears when the noise reduction is set to

ON.

• Speech compressor (p. 54)

➥While “M4” is selected, push [(F-2)COM] to turn

the speech compressor ON and OFF.

•Push [DISPLAY] once or twice to select M.

•Push [MENU] one or more times to select M4.

•“COM” appears when the speech compressor is set

to ON.

•Push [(F-2)COM] for 1 sec. to enter the compression

level set mode.

• Carrier frequency control (p. 75)

➥While “Q3” is selected, rotate main dial to adjust

the audio tone.

•Push [DISPLAY] for 1 sec. to enter the quick set

mode.

•Push [MENU] one or more times to select Q3.

• VOX (voice operated transmit) (p. 53)

➥While “M4” is selected, push [(F-1)VOX] to turn

the VOX function ON and OFF.

•Push [DISPLAY] once or twice to select M.

•Push [MENU] one or more times to select M4.

• “VOX” appears when the VOX function is set to ON.

•Push [(F-1)VOX] for 1 sec. to enter the VOX set mode.

RECEIVE AND TRANSMIT

DConnections for CW

■Operating CW

Rear panel

K4 CW PADDLE

Paddle

[KEY]

[MICROPHONE]

Straight key

Microphone

Keyer set mode setting

Rear panel

[ACC]

123

765

1011

For no break-in operation:

Connect an external switch

such as a foot switch; or use

the RTTY SEND terminal for

all bands. (See p. 38)

See p. 31 for connection details:

Paddle operation from front panel

MIC connector

Normal

Reverse

Bug

4RECEIVE AND TRANSMIT

DCW operation

qConnect a paddle or straight key as at previous

page.

wPush [(Y)BAND]/[(Z)BAND] to select the desired

band.

ePush [MODE] momentarily to select CW mode.

•After CW mode is selected, push [MODE] for 1 sec. to

toggle between CW and Memory keyer modes.

rWhile the quick set mode item “Q3” is selected in

CW mode, rotate main dial to select CW or CWå

mode.

•Push [DISPLAY] for 1 sec. to enter the quick set mode.

•Push [MENU] one or more times to select Q3.

•Push [DISPLAY] momentarily to return to normal oper-

ating mode.

tRotate [AF] control to set audio to a comfortable

listening level.

yRotate the main dial to simultaneously tune a de-

sired signal and its side tone.

uSet CW setting in the keyer set mode.

•Push [DISPLAY] once or twice to select M.

• Push [MENU] one or more times to select M4.

•Push [(F-2)KEY] for 1 sec. to enter the keyer set mode.

(p. 32)

iSet CW break-in operation as semi break-in, full

break-in or OFF.

•Push [MENU] one or more times to select “K1 BK-

IN.”

•Rotate the main dial to select CW break-in operation.

➧FULL: full break-in

➧on : semi break-in

➧OFF : no break-in (ACC socket connection is neces-

sary as at previous page.)

oSet the CW delay time when semi break-in opera-

tion is selected.

•Push [MENU] one or more times to select “K2 BK-

IN DELAY.”

•Rotate the main dial to set the desired delay time (see

p. 32 for details).

!0 Keying to transmit, use the electric keyer or pad-

dle to key your CW signals.

• The TX indicator lights red.

•The Po meter indicates transmitted CW signal

strength.

!1 Release keying to return to receive.

BK VFO A

K2 BK-IN DELAY

M4 KEY1/4 AGC

Delay time of 6.0

dots is selected

for semi break-in

operation.

53792040

60dB

K1 BK-IN

Semi break-in

operation is

selected.

Appears

LSB

VFO A

5379

20 40

60dB

USB CW R

AM WFM

M4 1/4 KEY AGC

F 2

[TX] indicator [MODE] Main dial

[DISPLAY][F-2][MENU]

[AF]

[Y]

[Z]

“CW” or “CWå” appears

RECEIVE AND TRANSMIT

• Preamp and attenuator (p. 46)

➥Push [P.AMP/ATT] momentarily to set the preamp

ON or OFF.

•Lights green when the preamp is set to ON.

➥Push [P.AMP/ATT] for 1 sec. to set the attenuator

ON.

•Push [P.AMP/ATT] momentarily to turn the attenua-

tor OFF.

• Lights red when the attenuator is set to ON.

• Noise blanker (p. 48)

➥While “M3” is selected, push [(F-2)NB] to turn the

noise blanker ON and OFF.

•Push [DISPLAY] once or twice to select M.

•Push [MENU] one or more times to select M3.

• “NB” appears when the noise blanker is set to ON.

•Push [(F-2)NB] for 1 sec. to enter the noise blanker

set mode.

• AGC (auto gain control) (p. 48)

➥While “M4” is selected, push [(F-3)AGC] to select

AGC fast and AGC slow.

•Push [DISPLAY] once or twice to select M.

•Push [MENU] one or more times to select M4.

•“F

AGC

” appears when the fast time constant is se-

lected.

• IF shift (p. 47)

➥Rotate [SHIFT] control.

• Noise reduction (p. 50)

➥While “S4” is selected,

push [(F-2)NR] to turn the

noise reduction ON and OFF.

•Push [DISPLAY] once or twice to select S.

•Push [MENU] one or more times to select S4.

•Push [(F-3)NRL] then rotate [M-CH] to adjust the

noise reduction level.

•“NR” appears when the noise reduction is set to ON.

• Auto notch ﬁlter (p. 50)

➥While “S4” is selected,

push [(F-1)ANF] to turn th

auto notch ﬁlter function ON and OFF.

•“ANF” appears when the noise reduction is set to

ON.

•1⁄4function

➥While “M4” is selected, push [(F-1)1/4] to turn

the 1⁄4function ON and OFF.

•Push [DISPLAY] once or twice to select M.

•Push [MENU] one or more times to select M4.

• Break-in function (p. 32)

➥While “M4” is selected, push [(F-2)KEY] for 1 sec.

to enter the keyer set mode.

•Push [DISPLAY] once or twice to select M.

•Push [MENU] one or more times to select M4.

➥Rotate the main dial to select the break-in OFF,

semi break-in or full break-in.

•“BK” or “F-BK” appears when the semi break-in or full

break-in is set to ON, respectively.

DConvenient functions for receive

DConvenient functions for transmit

DCW reverse mode

The CWå(CW Reverse) mode receives CW signals

with a reverse side CW carrier point like that of LSB

and USB modes. Use this mode when interference

signals are near the desired signal and you want to

change the interference tone.

qSelect CW mode with [MODE].

Push [DISPLAY] for 1 sec. to enter quick set mode.

ePush [MENU] one or more times to select “Q3 CW

REV,” then rotate the main dial to select CW and

CWåmodes.

• Check the interference tone.

Push [DISPLAY] momentarily to exit quick set mode.

• Receive audio tone response

(Reverse) CWå(Normal) CW

BFO

600 Hz

signal

inteference signal

600 Hz

BFO

inteference

[MODE] Main dial

[DISPLAY][MENU]

QUICK SET MODE

4RECEIVE AND TRANSMIT

DCW pitch control

The received CW audio pitch and monitored CW

audio pitch can be adjusted to suit your preferences

(300 to 900 Hz) without changing the operating fre-

quency.

qEnter the keyer set mode.

•Push [DISPLAY] once or twice to select M.

• Push [MENU] one or more times to select M4.

•Push [(F-2)KEY] for 1 sec. to enter the keyer set mode.

wPush [MENU] one or more times to select “K3 CW

PITCH,” then rotate the main dial to set the de-

sired pitch.

ePush [DISPLAY] to exit the keyer set mode.

K3 CW PITCH

CW This shows the

default setting for

the CW pitch

control (600 Hz).

Main dial[DISPLAY][MENU] [F-2]

DElectronic CW keyer

The IC-703 has an electronic keyer. Both keying

speed and weight (the ratio of dot :space:dash) can

be set.

• Setting the electronic keyer

qEnter the keyer set mode.

•

Push [DISPLAY] once or twice to select M.

• Push [MENU] one or more times to select M4.

•Push [(F-2)KEY] for 1 sec. to enter the keyer set mode.

wPush [MENU] one or more times to select “K4 CW

PADDLE,” then rotate the main dial to select the

paddle type.

•When “ud” is selected, the up/down switches on the mi-

crophone can be used as a paddle.

ePush [MENU] one more time to select item “K5

RATIO,” then rotate the main dial to select the de-

sired weight.

• Key weight can be selected from 2.8 to 4.5.

•Check the selected ratio with the side tone function in

CW mode.

Push [DISPLAY] momentarily to return to

Push [DISPLAY] for 1 sec. to enter quick set mode.

yPush [MENU] once or twice to select “Q2 KEY

SPEED,” then rotate the main dial to select the de-

sired keying speed.

•[M-CH] or [Y]/[Z] can also be used to select “Q2 KEY

SPEED.”

• Keying speed can be selected from 6 to 60 wpm.

Push [DISPLAY] momentarily to return to

Paddle operation from front panel MIC connector

Connect a CW paddle as at right to operate an elec-

tronic keyer from the front panel MIC connector.

•This function is available from the front panel mic

connector only.

•Be sure to select item “n,” “r,” “buG” or “oFF” in K4

CW PADDLE in the keyer set mode. (p. 32)

• Connect straight key to “DOT” side.

front panel

MIC connector

MIC U/D

paddle

DOT E

DASH

3.9 kΩ±5%

2.2 kΩ±5%

KEYING WEIGHT EXAMPLE: morse code “K”

DASH

Weight setting:

1:1:3 (default)

Weight setting:

Adjusted

DASH

DOT

(Fixed*)

Adjustable range SPACE (Fixed*)

*SPACE and DOT length can be adjusted

with “Q2 KEY SPEED” only.

Main dial[DISPLAY][MENU] [F-2][M-CH]

[Y]

[Z]

While M4 is selected in CW mode, push [(F-2)KEY] for

1 sec. to enter the keyer set mode.

RECEIVE AND TRANSMIT

K1 BK-IN

This item sets the CW break-in operation. The break-

in operation is selectable from off, on and FULL.

The default is OFF.

K2 BK-IN DELAY

This item adjusts break-in delay time for CW semi

break-in operation. The delay time is selectable from

2.0 to 13.0 (dots).

The default is 7.5 dots.

K3 CW PITCH

This item sets the CW pitch. CW pitch is adjustable

from 300 to 900 Hz in 10 Hz steps.

The default is 600 Hz.

K4 CW PADDLE

This item adjusts the CW paddle type. Four selec-

tions are available.

• n : normal (for electronic keyer use)

• r : reverse (for electronic keyer use)

•buG : When using the electronic keyer, key down

produces a “dash,” releasing the key automat-

ically produces a “dot(s).”

•oFF : Turns OFF the electronic keyer (for straight

key use)

• ud : For using the microphone’s [UP]/[DN] keys in-

stead of the CW paddle.

The default is “n,” normal.

K5 RATIO

This item adjusts the CW key ratio (or weight). The

ratio can be selected from 2.8 to 4.5.

The default is 3.0.

DCW side tone function

DKeyer set mode

When the transceiver is in the receive condition (and

the break-in function is OFF— below) you can listen

to the tone of your CW signal without actually trans-

mitting. This allows you to match your transmit signal

exactly to another station’s. This also convenient for

CW practice. CW side tone level can be adjusted in

the initial set mode (p. 77).

4RECEIVE AND TRANSMIT

The transceiver has a number of convenient functions

for the electronic keyer that can be accessed from the

memory keyer menu.

qSelect CW mode with [MODE].

wPush [MODE] for 1 sec. to select the memory

keyer send menu.

•Push [MODE] momentarily to return to normal CW op-

erating mode.

ePush [DISPLAY] to enter the memory keyer menu.

See the diagram below.

•Push [DISPLAY] momentarily to return to the memory

keyer send menu.

[DISPLAY]

[MODE]

VFO A

1 1.5 2 3 5

5379

20 40

60dB

∞

BLANK

VFO A

1 1.5 2 3 5

5379

20 40

60dB

∞

BLANK

M4 1/4 KEY AGC

-1

MK1 MK2 MK3

F 1 F 2 F 3

MK1 MK2 MK3

F 1 F 2 F 3

EDT 001 SET

F 1 F 2 F 3

ÅCFU TU Ç

Push [MENU](

)

or [DIAPLAY]

Push [MENU](

)

or [DIAPLAY]

Push [MENU](

)

or [DIAPLAY]

Push [MENU](

)

or [DIAPLAY]

ÅUR 5NN* BÇ

ÅCQ TEST CÇ

02 MSG DISPLAY

01 REPEAT TIME

03 PRESENT No.

02 CNT UP TRIG

01 NUM STYLE

MODE

DISPLAY

• CW mode

• Edit menu • Contest number set mode • Menory keyer set mode

• Memory keyer send menu • Memory keyer menu

Push Push

Push

Push Push Push Push* Push*

*Set mode item can be selected

with [Y BAND]/[Z BAND] or

[M-CH] during set mode.

Push [F-1]

Push

[DISPLAY]

Push

[DISPLAY]

Push [F-2]

Push [F-3]

Push

for 1 sec.

■Memory keyer functions

RECEIVE AND TRANSMIT

Pre-set characters can be sent using the memory

keyer send menu. Contents of the memory keyer are

set using the edit menu.

• Transmitting

qSelect CW mode with [MODE].

wPush [MODE] for 1 sec. to enter the memory keyer

send menu.

eSet the break-in function ON (p. 32).

•When step ris performed during the break-in func-

tion OFF, monitors the memory keyer contents.

rPush one of the function keys ([(F-1)MK1] to

[(F-3)MK3]) to send the contents of the memory

keyer.

•Pushing a function key for 1 sec. repeatedly sends the

contents and blinks “MK1,” “MK2” or “MK3” indication;

push any function key to cancel the transmission.

•Keying with the connected straight key or paddle to

[KEY] on the rear panel is also cancels the transmis-

sion.

• Under bars (___) are indicated for the count up trig-

ger set channel.

•The contest number counter is incremented each time

the contents are sent.

• Push [MENU] to reduce the contest number count by 1

when resending contents to unanswered calls.

tPush [MODE] momentarily to exit memory keyer

send menu and return to normal CW mode indica-

tion.

-1

CQ TEST CQ

-1

MK1 MK2 MK3

---

-1

UR 5NN001 B

-1

CFM TU

• Memory keyer send menu

•MK1 send indication

•MK2 send indication

•MK3 send indication

Count up trigger

indication

Counter

-1

MK1 MK2 MK3

F 1 F 2 F 3

VFO A

5379

20 40

60dB

BLANK

---

Sends [(F-1)MK1]–[(F-3)MK3] contents.

• Memory keyer send menu

[MENU]

[F-3][F-1]

[F-2]

[MODE]

DMemory keyer send menu

4RECEIVE AND TRANSMIT

The contents of the memory keyer memories can be

set using the memory keyer edit menu. The memory

keyer can memorize and re-transmit 3 CW key codes

for often-used CW sentences, contest numbers, etc.

Total capacity of the memory keyer is 50 characters

per memory channel.

• Programming contents

qSelect CW mode with [MODE].

wEnter the memory keyer menu.

•Push [MODE] for 1 sec. to enter the memory keyer

send menu.

•Push [DISPLAY] momentarily to enter the memory

keyer menu.

ePush [(F-1)EDT] to enter the edit menu.

rPush the multi-function key, [(F-1)MK1], [(F-2)MK2]

or [(F-3)MK3], to select the desired memory keyer

channel to be edited.

tInput the desired character by rotating the main

dial.

• Selectable characters (with the main dial);

NOTE:

“^” is used to transmit a following word with no

space such as

. Put “^” before a text string

such as ^AR, and the string “

” is sent with no

space.

“*” is used to insert the CW contest number.

The contest number automatically increments

by 1. This function is only available for one

memory keyer channel at a time. Memory keyer

channel MK2 used “*” by default.

Push [(F-2)] to erase characters.

yPush [(F-1)ç] or [(F-3)å] to move the cursor back-

wards or forwards, respectively.

uRepeat steps tand yto input the desired char-

acters.

iPush [MENU] or [DISPLAY] three times to return

to the keyer send menu.

Pre-programmed contents

MK1 MK2 MK3

EDT 001 SET

Å [ DEL] Ç

ÅCFU TU Ç

ÅÇ

ÅQ Ç

ÅSL TU D Ç

ÅYUA TEST Ç

F 1

F 2

F 3

Displays “[DEL]” for 1 sec. then shows

the default contents.

Push [F-2] to erase characters.

• Example display— when inputting QSL TU

DE JA3YUA TEST into MK3

• Memory keyer menu

• Edit menu

•MK3 indication (default)

Push

[MENU] [DISPLAY]

[F-3][F-1]

[F-2]

[MODE] Main dial

ÅCFU TU Ç

ÅUR 5NN* BÇ

ÅCQ TEST CÇ

•MK1 indication (default) •MK2 indication (default) •MK3 indication (default)

Contest number counter is set

by entering an asterisk (*).

A B C D E F G H I J K L M N O P Q R S T

U V W X Y Z / ? . , * ^

CH CONTENTS

MK1 CQ TEST CQ TEST DE ICOM ICOM T

MK2 UR 5NN* BK

MK3 CFM TU

DEditing a memory keyer

RECEIVE AND TRANSMIT

DContest number set mode

This menu is used to set the contest (serial) number

and count up trigger, etc.

• Setting contents

qSelect CW mode with [MODE].

wEnter the memory keyer menu.

•Push [MODE] for 1 sec. to enter the memory keyer

send menu.

•Push [DISPLAY] momentarily to enter the memory

keyer menu.

ePush [(F-2)001] to enter the contest number set

mode.

rPush [MENU] once or twice to select the desired set

item.

• [M-CH] or [Y]/[Z] can also be used.

tSet the desired condition using the main dial.

yPush [DISPLAY] twice to return to the memory

keyer send menu.

[MENU] [DISPLAY][M-CH] [F-2]

[MODE] Main dial

[Y]

[Z]

02 CONT UP TRIG (Count up trigger)

This selects which of the three memory slots will have

the contest serial number exchange. The count up

trigger allows the serial number automatically incre-

mented after each complete serial number exchange

is sent.

• 1 (MK1), 2 (MK2) and 3 (MK3) can be set. (default: 2)

02 CNT UP TRIG

01 NUM STYLE (Number style)

This item sets the numbering system used for contest

(serial) numbers— normal or morse cut numbers.

n : Does not use morse cut number (default)

190.Ano: Sets 1 as A, 9 as N and 0 as O.

190.Ant : Sets 1 as A, 9 as N and 0 as T.

90.no : Sets 9 as N and 0 as O.

90.nt : Sets 9 as N and 0 as T.

01 NUM STYLE

03 PRESENT No. (Present number)

This item shows the current number for the count up

trigger channel set above.

•Rotate the tuning dial to change the number.

03 PRESENT No.

4RECEIVE AND TRANSMIT

DMemory keyer set mode

This set mode is used to set the memory keyer repeat

time and indication type of the messages.

• Setting contents

qSelect CW mode with [MODE].

wEnter the memory keyer menu.

•Push [MODE] for 1 sec. to enter the memory keyer

send menu.

•Push [DISPLAY] momentarily to enter the memory

keyer menu.

ePush [(F-3)SET] to enter the memory keyer set

mode.

rPush [MENU] to select the desired set item.

• [M-CH] or [Y]/[Z] can also be used.

tSet the desired condition using the main dial.

yPush [DISPLAY] twice to return to the memory

keyer send menu.

[MENU] [DISPLAY][M-CH] [F-3]

[MODE] Main dial

[Y]

[Z]

01 REPEAT TIME (Repeat time)

When sending CW using the repeat timer, this item

sets the time between transmission.

• 1 to 60 sec. in 1 sec. steps can be selected.

01 REPEAT TIME

02 MSG DISPLAY (Message display)

This item sets the indication type of the messages

(pre-set characters).

n : Normal indication (default)

[(F-1)MK1], [(F-2)MK2], [(F-3)MK3]

3 : First three characters of the massages are in-

dicated.

e.g. [(F-1)CQ ], [(F-2)UR ], [(F-3)CFM]

3.cn : First three characters of the massages and

contest number are indicated.

e.g. [(F-1)CQ ], [(F-2)001], [(F-3)CFM]

02 MSG DISPLAY

RECEIVE AND TRANSMIT

DConnections for RTTY (FSK)

[ACC]

123

765

1011

Rear panel

TU or TNC

Personal computer

Rear panel

view

Colors refer to connection

to the supplied ACC cable.

*1Connect SQL line when required.

MSEND (orenge)

GND (red)

FSKK (black)

SQL*1 (light green)

AF out (light blue)

■Operating RTTY

DRTTY (FSK) operation

qConnect a terminal unit as at above.

wPush [(Y)BAND]/[(Z)BAND] to select the desired

band.

ePush [MODE] momentarily to select RTTY mode.

•After RTTY mode is selected, push [MODE] for 1 sec.

to toggle between RTTY and SSB-D modes.

rWhile the quick set mode item “Q2” is selected in

RTTY mode, rotate main dial to select RTTY or

åRTTY mode.

•Push [DISPLAY] for 1 sec. to enter the quick set mode.

•Push [MENU] one or more times to select Q2.

•Push [DISPLAY] momentarily to return to normal oper-

ating mode.

tRotate [AF] to set audio to a comfortable listening

level.

ySelect the desired FSK tone/shift frequencies and

keying polarity as at page 40.

uRotate the main dial to tune a desired signal.

•Use [(F-1)1/4] in the M4 display when critical setting is

required.

•S-meter indicates received signal strength.

•If the received signal cannot be demodulated, try se-

lecting åRTTY mode (or RTTY mode).

iTransmit a SEND signal from your TNC.

•The TX indicator lights red.

•T

he Po meter indicates transmitted RTTY signal

strength.

oOperate the connected PC or TNC (TU) to trans-

mit RTTY (FSK) signals.

LSB

VFO A

5379

20 40

60dB

USB CW R

AM WFM

M4 1/4 TON AGC

[TX] indicator [MODE] Main dial

[DISPLAY][F-1]

[MENU] [F-2]

[AF]

[Y]

[Z]

“RTTY” or “åRTTY” appears

4RECEIVE AND TRANSMIT

• Preamp and attenuator (p. 46)

➥Push [P.AMP/ATT] momentarily to set the preamp

ON or OFF.

•Lights green when the preamp is set to ON.

➥Push [P.AMP/ATT] for 1 sec. to set the attenuator

ON.

•Push [P.AMP/ATT] momentarily to turn the attenua-

tor OFF.

• Lights red when the attenuator is set to ON.

• Noise blanker (p. 48)

➥While “M3” is selected, push [(F-2)NB] to turn the

noise blanker ON and OFF.

•Push [DISPLAY] once or twice to select M.

•Push [MENU] one or more times to select M3.

• “NB” appears when the noise blanker is set to ON.

•Push [(F-2)NB] for 1 sec. to enter the noise blanker

set mode.

• AGC (auto gain control) (p. 48)

➥While “M4” is selected, push [(F-3)AGC] to select

AGC fast and AGC slow.

•Push [DISPLAY] once or twice to select M.

•Push [MENU] one or more times to select M4.

•“F

AGC

” appears when the fast time constant is se-

lected.

• IF shift (p. 47)

➥Rotate [SHIFT] control.

• Noise reduction (p. 50)

➥While “S4” is selected,

push [(F-2)NR] to turn the

noise reduction ON and OFF.

•Push [DISPLAY] once or twice to select S.

•Push [MENU] one or more times to select S4.

•Push [(F-3)NRL] then rotate [M-CH] to adjust the

noise reduction level.

• “NR” appears when the noise reduction is set to ON.

• Auto notch ﬁlter (p. 50)

➥While “S4” is selected,

push [(F-1)ANF] to turn th

auto notch ﬁlter function ON and OFF.

•“ANF” appears when the noise reduction is set to

ON.

•1⁄4function

➥While “M4” is selected, push [(F-1)1/4] to turn

the 1⁄4function ON and OFF.

•Push [DISPLAY] once or twice to select M.

•Push [MENU] one or more times to select M4.

DConvenient functions for receive

DRTTY 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

åRTTY (RTTY reverse) mode.

qSelect RTTY mode with [MODE].

Push [DISPLAY] for 1 sec. to enter quick set mode.

ePush [MENU] one or more times to select “Q2

RTTY REV,” then rotate the main dial to select

RTTY and åRTTY modes.

• Check the interference tone.

Push [DISPLAY] momentarily to exit quick set mode.

ReverseNormal

BFO

170

2125

Hz 170

2125

BFO

Mark

Space

displayed freq.displayed freq.

Mark

Space

[MODE]

Main dial[DISPLAY][MENU]

QUICK SET MODE

RECEIVE AND TRANSMIT

DPresetting for RTTY

Tone frequency

qPush [MODE] momentarily to select RTTY mode.

•After RTTY mode is selected, push [MODE] for 1 sec.

to toggle between RTTY and SSB-D modes.

wEnter the RTTY tone set mode.

•

Push [DISPLAY] once or twice to select M.

• Push [MENU] one or more times to select M4.

•Push [(F-2)TON] for 1 sec. to enter the RTTY tone set

mode (below).

ePush [MENU] one or more times to select “R1

RTTY TONE,” then rotate the main dial to select

the desired frequency.

Shift frequency

qEnter the RTTY tone set mode as same as above.

wPush [MENU] one or more times to select “R2

RTTY SHIFT,” then rotate the main dial to select

the desired shift frequency.

RTTY keying

qEnter the RTTY tone set mode as same as above.

wPush [MENU] one or more times to select R3

RTTY KEYING; then rotate the main dial to se-

lect the desired keying polarity.

After presetting is ﬁnished, push [DISPLAY] momen-

tarily to return the normal operating mode.

R3 RTTY KEYING

RTTY keying is set to

‘normal’.

normal :

key open=mark

key close=space

reverse:

key open=space

key close=mark

R2 RTTY SHIFT

RTTY shift frequency

is set to 170 Hz.

170/200/425 Hz are

available.

R1 RTTY TONE

RTTY mark frequency

is set to 2125 Hz.

2125, 1615 and 1275

Hz are available.

[MODE] Main dial

[DISPLAY][MENU] [F-2]

R3 RTTY KEYING (RTTY only)

This item adjusts the RTTY keying. Normal or reverse

keying can be selected.

The default is “n,” normal.

Normal : key open=mark

Reverse : key open=space

R1 RTTY TONE

This item selects the RTTY tone. RTTY tone is se-

lected between 1275, 1615 and 2125 Hz.

The default is 2125 Hz.

R2 RTTY SHIFT

This item adjusts the RTTY shift. There are 3 selec-

table values: 170, 200 and 425 Hz.

The default is 170 Hz.

While M4 is selected in RTTY mode, push [(F-2)TON]

for 1 sec. to enter the RTTY tone set mode.

DRTTY tone set mode

4RECEIVE AND TRANSMIT

DConvenient functions for receive

DConvenient functions for transmit

■Operating AM

qPush [(Y)BAND]/[(Z)BAND] to select the desired

band.

wPush [MODE] momentarily or push for 1 sec. to se-

lect AM mode.

•After FM or AM mode is selected, push [MODE] for

1 sec. to toggle between FM and AM modes.

eRotate [AF] control to set audio to a comfortable lis-

tening level.

rRotate the main dial to tune a desired signal.

•S-meter indicates received signal strength.

•The default tuning step for AM mode is 1 kHz; this can

be changed using the tuning step program mode. (p.19)

tPush [PTT] (microphone) to transmit.

•The TX indicator lights red.

ySpeak into the microphone at your normal voice

level.

•Adjust ‘MIC GAIN’ at this step, if necessary. (p. 26)

uRelease [PTT] (microphone) to return to receive.

LSB

VFO A

5379

20 40

60dB

USB CW R

AM WFM

M1 SPL A/B XFC

[TX] indicator [MODE]

Main dial

[AF]

[Y]

[Z]

“AM” appears

• Preamp and attenuator (p. 46)

➥Push [P.AMP/ATT] momentarily to set the preamp

ON or OFF.

•Lights green when the preamp is set to ON.

➥Push [P.AMP/ATT] for 1 sec. to set the attenuator

ON.

•Push [P.AMP/ATT] momentarily to turn the attenua-

tor OFF.

• Lights red when the attenuator is set to ON.

• Noise blanker (p. 48)

➥While “M3” is selected, push [(F-2)NB] to turn the

noise blanker ON and OFF.

•Push [DISPLAY] once or twice to select M.

•Push [MENU] one or more times to select M3.

• “NB” appears when the noise blanker is set to ON.

•Push [(F-2)NB] for 1 sec. to enter the noise blanker

set mode.

•Initial set mode item “30 AM NB” (p. 80) is must be

set ON when noise blanker function is used in AM

mode. (Default setting is ON.)

• IF shift (p. 47)

➥Rotate [SHIFT] control.

• AGC (auto gain control) (p. 48)

➥While “M4” is selected, push [(F-3)AGC] to select

AGC fast and AGC slow.

•Push [DISPLAY] once or twice to select M.

•Push [MENU] one or more times to select M4.

•“F

AGC

” appears when the fast time constant is se-

lected.

• Noise reduction (p. 50)

➥While “S4” is selected,

push [(F-2)NR] to turn the

noise reduction ON and OFF.

•Push [DISPLAY] once or twice to select S.

•Push [MENU] one or more times to select S4.

•Push [(F-3)NRL] then rotate [M-CH] to adjust the

noise reduction level.

• “NR” appears when the noise reduction is set to ON.

• Auto notch ﬁlter (p. 50)

➥While “S4” is selected,

push [(F-1)ANF] to turn th

auto notch ﬁlter function ON and OFF.

•“ANF” appears when the noise reduction is set to

ON.

• Speech compressor (p. 54)

➥While “M4” is selected, push [(F-2)COM] to turn

the speech compressor ON and OFF.

•Push [DISPLAY] once or twice to select M.

•Push [MENU] one or more times to select M4.

•“COM” appears when the speech compressor is set

to ON.

•Push [(F-2)COM] for 1 sec. to enter the compression

level set mode.

• VOX (voice operated transmit) (p. 53)

➥While “M4” is selected, push [(F-1)VOX] to turn

the VOX function ON and OFF.

•Push [DISPLAY] once or twice to select M.

•Push [MENU] one or more times to select M4.

• “VOX” appears when the VOX function is set to ON.

•Push [(F-1)VOX] for 1 sec. to enter the VOX set

mode.

RECEIVE AND TRANSMIT

DConvenient functions for receive

DConvenient functions for transmit

■Operating FM

qPush [(Y)BAND]/[(Z)BAND] to select the desired

band.

wPush [MODE] momentarily or for 1 sec. to select

FM mode.

•After FM or AM mode is selected, push [MODE] for

1 sec. to toggle between FM and AM modes.

eRotate [AF] control to set audio to a comfortable lis-

tening level.

rRotate the main dial to tune a desired signal.

•S-meter indicates received signal strength.

•The default tuning step for FM mode is 1 kHz; this can

be changed using the tuning step program mode. (p.19)

tPush [PTT] (microphone) to transmit.

•The TX indicator lights red.

ySpeak into the microphone at your normal voice

level.

•Adjust ‘MIC GAIN’ at this step, if necessary. (p. 26)

uRelease [PTT] (microphone) to return to receive.

LSB

VFO A

5379

20 40

60dB

USB CW R

AM WFM

M1 SPL A/B XFC

[TX] indicator [MODE]

Main dial

[AF]

[Y]

[Z]

“FM” appears

• Preamp and attenuator (p. 46)

➥Push [P.AMP/ATT] momentarily to set the preamp

ON or OFF.

•Lights green when the preamp is set to ON.

➥Push [P.AMP/ATT] for 1 sec. to set the attenuator

ON.

•Push [P.AMP/ATT] momentarily to turn the attenua-

tor OFF.

• Lights red when the attenuator is set to ON.

• IF shift (p. 47)

➥Rotate [SHIFT] control.

• Noise reduction (p. 50)

➥While “S4” is selected,

push [(F-2)NR] to turn the

noise reduction ON and OFF.

•Push [DISPLAY] once or twice to select S.

•Push [MENU] one or more times to select S4.

•Push [(F-3)NRL] then rotate [M-CH] to adjust the

noise reduction level.

• “NR” appears when the noise reduction is set to ON.

• Auto notch ﬁlter (p. 50)

➥While “S4” is selected,

push [(F-1)ANF] to turn th

auto notch ﬁlter function ON and OFF.

•“ANF” appears when the noise reduction is set to

ON.

• VOX (voice operated transmit) (p. 53)

➥While “M4” is selected, push [(F-1)VOX] to turn

the VOX function ON and OFF.

•Push [DISPLAY] once or twice to select M.

•Push [MENU] one or more times to select M4.

• “VOX” appears when the VOX function is set to ON.

•Push [(F-1)VOX] for 1 sec. to enter the VOX set

mode.

4RECEIVE AND TRANSMIT

Tone squelch operation is a method of communica-

tions using selective calling. Only received signals

having a matching tone will open the squelch. Before

communicating using tone squelch, all members of

your party must agree on the tone squelch frequency

to use.

qPush [MODE] one or more times to select FM

mode.

wSelect M4.

•Push [DISPLAY] once or twice to select M.

• Push [MENU] one or more times to select M4.

ePush [(F-2)TON] for 1 sec. to enter the FM tone set

mode.

•Push [MENU] one or more times to select “T2 TONE

SQL.”

rRotate the main dial to set the desired subaudible

tone frequency.

•See left table for available tone frequencies.

•Push [DISPLAY] to exit the FM tone set mode.

tPush [(F-2)TON] once or twice to turn the tone

squelch function.

•“TSQL” appears.

yCommunicate in the usual manner.

• Push [PTT] to transmit; release to receive.

• Available tone squelch frequencies (Unit: Hz)

VFO A

5379

20 40

60dB

FM TSQL

SPL

M4 VOX TON

T2 TONE SQL

[MODE] Main dial

[DISPLAY][MENU] [F-2]

DTone squelch operation

By monitoring a signal that is being transmitted on a

repeater input frequency, you can determine the tone

frequency necessary to open a repeater.

qDuring tone squelch or repeater operation (“T” or

“TSQL” is displayed, select M4.

•Push [DISPLAY] once or twice to select M.

• Push [MENU] one or more times to select M4.

wPush [(F-2)TON] for 1 sec. to enter the FM tone set

mode.

•Push [MENU] one or more times to select “T3 T-SQL

SCN” during tone squelch operation or “T3 RPTR-T

SCN” during repeater operation.

•If tone squelch function or tone encoder has not been

selected, this item does not appear.

ePush [(F-3)SCN] to toggle the tone scan operation

ON and OFF.

•While scanning, tone frequencies are displayed instead

of the operating frequency.

•When a matched tone is detected, tone scan automati-

cally stops, the matched tone is displayed and the re-

peater tone (or tone squelch tone) setting is

automatically adjusted accordingly.

rPush [DISPLAY] to exit the FM tone set mode.

During repeater

operation.

53792040

60dB

FM T

T3 RPTR-T SCN

During tone squelch

operation.

53792040

60dB

FM TSQL

T3 T-SQL SCN

Main dial

[DISPLAY][MENU] [F-2]

[F-3]

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

DTone scan operation

RECEIVE AND TRANSMIT

T3 RPTR-T SCN

(Repeater tone scan)

During repeater operation, you can detect the tone

frequency necessary to open a repeater. (see p. 45)

The default is 88.5 Hz.

FM-T

T3 T-SQL SCN

(Tone squelch tone scan)

During tone squelch operation, you can detect the

tone frequency necessary to communicate using tone

squelch. (see p. 43)

The default is 88.5 Hz.

FM-TSQL

T1 RPTR TONE

This item selects a subaudible tone for FM-T mode

operation to access a repeater. There are 50 tones

available from 67.0 Hz to 254.1 Hz (see table at

right). • Available subaudible tone frequencies (Unit: Hz)

The default is 88.5 Hz.

T2 TONE SQL

This item sets a subaudible tone for tone squelch use.

The same subaudible tone frequencies as for re-

peater operation are available—see above

The default is 88.5 Hz.

While M4 is selected in FM mode, push [(F-2)TON] for

1 sec. to enter the FM tone set mode.

DFM tone set mode

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

4RECEIVE AND TRANSMIT

■Repeater operation

A repeater ampliﬁes received signals and re-transmits

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.

qSet the offset frequency and turn ON the quick split

function in initial set mode in advance (pgs. 79, 80).

•If the quick split function is turned OFF, both transmit

and receive must be set separately.

wPush [MODE] one or more times to select FM

mode, then set the receive frequency.

eSelect M1.

•Push [DISPLAY] once or twice to select M.

•Push [MENU] one or more times to select M1.

rPush [(F-1)SPL] for 1 sec. to activate the split fre-

quency function with the pre-selected offset.

tSelect M4.

•Push [MENU] one or more times to select M4.

yPush [(F-2)TON] for 1 sec. to enter the FM tone set

mode.

•If FM mode has not been selected, this item does not

appear.

•Push [MENU] one or more times to select “T1 RPTR

TONE.”

•Rotate the main dial to set a subaudible tone frequency.

•Push [DISPLAY] to exit the FM tone set mode.

uPush [(F-2)TON] to turn the tone encoder.

•“T” appears.

iTo check the repeater input frequency (direct sig-

nal from the other station), push and hold

[(F-3)XFC]in the M1 display.

oTo return to simplex operation, push [(F-1)SPL] in

the M1 display.

Each memory channel can store a tone frequency

and an offset frequency, as well as the operating fre-

quency. Store repeater information into memory chan-

nels for quick and easy access to repeaters.

• Available subaudible tone frequencies (Unit: Hz)

VFO A

5379

20 40

60dB

FM T

SPL

M4 VOX TON

T1 RPTR TONE

Set the tone fre-

quency.

See below table

for available fre-

quencies.

VFO A

5379

20 40

60dB

SPL

M1 SPL A/B XFC

24 QUICK SPLIT

Turn the quick

split function ON.

(Initial set mode

default is ON.)

[MODE] Main dial

[DISPLAY][MENU] [F-2]

[F-3][F-1]

CONVENIENT

NOTE: The split function may not be turned off

when you change the operating band, push

[(F-1)SPL] again to turn off the split function after

you ﬁnish the repeater operation.

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

FUNCTION FOR RECEIVE

■Simple band scope

This function allows you to visually “sweep” an area

surrounding the set frequency for other signals. De-

tected signals are indicated graphically in the dot ma-

trix section of the display.

NOTE:

Use the attenuator or turn OFF the preamp

when using the band scope on a band containing a lot

of noise.

qSet a mode and frequency.

wSelect G1.

•Push [DISPLAY] once or twice to select G.

• Push [MENU] one or more times to select G1.

ePush [F-1] one or more times to select the desired

steps.

•Each dot corresponds to a step for the indicated fre-

quency.

•0.5k, 1k, 2k, 5k, 10k, 20k and 0.1M (100 kHz) can be

set for the scope step.

rPush [F-3] to start the sweep.

•“___” (below SWP) ﬂashes while sweeping.

• The receive audio is muted while sweeping.

tRotate the main dial if you want to monitor the dis-

played signals.

•The sweep marker indicates the location of the dis-

played frequency in the sweep readout.

•If the displayed frequency is outside of the sweep read-

out (determined by the sweep width), the sweep marker

ﬂashes.

yPush [F-2] to return the frequency to the start of a

sweep.

• The sweep marker moves back to the center position.

1k SWP

2k SWP

___

2k SWP

Select sweep width

([F-1])

Start sweep

([F-3])

Sweep is finished

([F-3] again)

Move sweep marker

(main dial)

2k SWP Returns to previous

frequency ([F-2])

sweep marker

Main dial

[DISPLAY][MENU] [F-2]

[F-3][F-1]

■Preamp and attenuator

The preamp amplifies received signals in the front

end circuit to improve the S/N ratio and sensitivity.

Turn this function ON when receiving weak signals.

The attenuator prevents desired signals from distort-

ing when very strong signals are near the desired fre-

quency or when very strong electric fields, such as

from broadcasting stations, are near your location.

Push [P.AMP/ATT] momentarily to turn the preamp ON

and OFF; push for 1 sec. to turn the attenuator ON.

•Lights green when the preamp is ON; lights red when

the 20 dB attenuator is ON.

• Only one of these functions can be activated at a time.

momentarily

momentarily 1 sec.

P.AMP/ATT

[P.AMP/ATT]

P.AMP/ATT

Lights green while the preamp is activated;

lights red while the attenuator is activated.

The IF shift function electronically changes the pass-

band frequency of the IF (intermediate frequency)

and cuts out higher or lower frequency components

of the IF to reject interference. The function shifts the

IF frequency up to ±1.2 kHz in 15 Hz steps in

SSB/CW/RTTY modes and up to ±250 Hz in 3 Hz

steps in CW-ã/RTTY-ãmodes. The IF shift is not

available in FM and AM modes.

(ã: Narrow)

qAdjust the [SHIFT] control for a minimum interfer-

ence signal level.

•The audio tone may be changed while the IF shift is in

use.

wSet the shift control to its center position when

there is no interference.

• Graphic display

The IF shift is displayed graphically (for about 1 sec.)

each time the shift control is rotated.

M-CH M-CH M-CHSHIFT

M-CH SHIFT

SHIFT SHIFT

Shifts low Center Shifts high

SHIFT

[SHIFT]

VFO A

S1 5379204060dB

USB

■RIT function

The RIT (Receive Incremental Tuning) function com-

pensates for off-frequencies of communicating sta-

tions. The function shifts the receive frequency up to

±9.99 kHz in 10 Hz steps without moving the transmit

frequency. “21 SUB DIAL” item in initial set mode

must be set to RIT mode in advance. (p. 79)

qPush [RIT].

•The [RIT] indicator lights red.

wRotate the [M-CH] control to cancel the off-fre-

quencies.

• The transmit frequency is not shifted.

eTo cancel the RIT function, push [RIT] again.

• The [RIT] switch indicator goes out.

• Calculate function

The shift frequency of the RIT function can be

added/subtracted to the displayed frequency.

While the RIT indicator is lit, push and hold [RIT] for

1 sec.

NOTE:

The RIT function is not available in FM or

AM modes regardless of the Initial Set mode set-

ting. (p. 79)

Push for

1 sec.

USB

RIT

SUB

RIT

SUB

Indicator lights red while

RIT function is activated.

[M-CH] [RIT]

■IF shift function

5FUNCTION FOR RECEIVE

FUNCTION FOR RECEIVE

■Noise blanker

■AGC time constant

The noise blanker reduces pulse-type noise such as

that generated by automobile ignition systems. This

function is not effective for FM mode or for non pulse-

type noise. If you don’t want to use the noise blanker

for AM communications, the “30 AM NB” item in initial

set mode must be turned OFF (ON is the default set-

ting—p. 80).

qSelect M3.

•Push [DISPLAY] once or twice to select M.

• Push [MENU] one or more times to select M3.

wPush [(F-2)NB] to toggle the noise blanker ON and

OFF.

• “NB” appears when the noise blanker is turned ON.

ePush [(F-2)NB] for 1 sec. to enter the noise blanker

level set mode (below).

rRotate the main dial to set the noise blanker level.

tPush [DISPLAY] to exit the noise blanker level set

mode.

VFO A

S1 5379204060dB

USB

M3 FIL NB MET

510

Appears when

the noise blanker

is turned ON.

Main dial[DISPLAY][MENU] [F-2]

The AGC (Automatic Gain Control) controls receiver

gain to produce a constant audio output level even

when the received signal strength is varied by fading,

etc. Use AGC slow for normal phone operation; AGC

fast for receiving data and searching for signals. AGC

time constant cannot be changed in FM mode.

qSelect M4.

•Push [DISPLAY] once or twice to select M.

• Push [MENU] one or more times to select M4.

wPush [(F-3)AGC] to toggle the AGC time constant

between fast and slow.

•“FAGC” appears when the fast time constant is selected.

VFO A

S1 5379204060dB

USB

M4 VOX COM AGC

FAGC

510

Appears when

AGC fast is

selected.

[DISPLAY][MENU]

[F-3]

N1 NB LEVEL

This item adjusts the noise blanker level. The noise

blanker level can be adjusted from 0 to 10.

The default is 5.

USB

Although noise blanker level set mode is available in all modes, the noise blanker function is not effective for FM

mode.

While M3 is selected in all modes, push [(F-2)NB] for

1 sec. to enter the noise blanker level set mode.

DNoise blanker level set mode 5

5FUNCTION FOR RECEIVE

■Optional ﬁlter selection

• Filter variations

*Optional ﬁlter.

**Although the FL-96 is not listed on the option list, IC-703 would

take FL-96 as well as other optional ﬁlter.

One optional ﬁlter can be installed in the IC-703.

Narrow filters help reject interference from adjacent

signals and obtain good selectivity.

Wide ﬁlters provide improved audio for SSB operation

when no interfering signals are present.

Consult the table below to select a ﬁlter most suitable

for your operating needs.

Narrow ﬁlters for AM/FM modes are standard.

FILTER PRESETTING:

After you install a ﬁlter (see p. 87 for installation), you

must specify the installed ﬁlter in initial set mode (item

“22 OPT. FIL” ; see p. 79).

FILTER ON/OFF:

qSelect M3.

•Push [DISPLAY] once or twice to select M.

• Push [MENU] one or more times to select M3.

wPush [(F-1)FIL] momentarily to select the narrow

ﬁlter; push for 1 sec. to select the wide ﬁlter.

•ãappears when the narrow filter is selected; çap-

pears when the wide ﬁlter is selected.

NOTE:

When selecting the narrow ﬁlter (or wide ﬁl-

ter), the graphic passband is changed. (see dia-

gram below)

[DISPLAY][MENU]

[F-1]

Normal

operation

wide is

selected

narrow is

selected

FL-53A* CW, RTTY 250 Hz/–6 dB

CW, RTTY 500 Hz/–6 dB

SSB, CW, RTTY 1.8 kHz/–6 dB

FL-65 SSB, CW, RTTY 2.3 kHz/–6 dB

SSB, CW, RTTY 2.8 kHz/–6 dB

Mode BandwidthName

FL-222*

FL-52A*

FL-96**

SSB, CW, RTTY 3.3 kHz/–6 dBFL-257*

FM Normal Through (15 k)

Narrow CFWS455G (8 k)

AM Normal CFWS455G (8 k)

Narrow FL-65 (2.4 k)

SSB, CW, RTTY

•

Optional ﬁlter installation and selection tables

No optional

ﬁlter

FL-52A

FL-53A

FL-96

FL-222

FL-257

———

FL-52A (500)

FL-53A (250)

———

FL222 (1.8 k)

———

FL-65 (2.3 k)

———

FL-96 (2.8 k)

———

FL-257 (3.3 k)

Bandwidth Narrow Medium Wide

Filter

FUNCTION FOR RECEIVE

This function automatically attenuates beat tones,

tuning signals, etc., even if they are moving. The au-

tomatic notch filter functions in SSB, FM and AM

modes.

qSelect S4 (DSP menu).

•Push [DISPLAY] once or twice to select S.

•Push [MENU] one or more times to select S4.

wPush [(F-1)ANF] to toggle the automatic notch ﬁl-

ter ON and OFF.

• “DSP” and “ANF” appear when the function is ON.

VFO A

5379

20 40

60dB

USB

ANFANF

BLANK

DSP

S4 ANF NR NRL

[DISPLAY][MENU]

[F-1]

DANF (Automatic Notch Filter) function

■DSP Functions (may require an optional unit depending on version—see p. 92)

DNR (Noise Reduction) function

This function reduces noise components and picks

out desired signals which are buried in noise. The re-

ceived AF signals are converted to digital signals and

then the desired signals are separated from the noise.

The noise reduction function is available for all oper-

ating modes.

qSelect S4 (DSP menu).

•Push [DISPLAY] once or twice to select S.

•Push [MENU] one or more times to select S4.

wPush [(F-2)NR] to toggle the noise reduction func-

tion ON and OFF.

• “DSP” and “NR” appear when the function is ON.

ePush [(F-3)NRL] to toggle the noise reduction level

indication ON and OFF.

rRotate the [M-CH] control to set the noise reduc-

tion level.

•Set the control for maximum readability. Deep rotation

results in audio signal masking or distortion.

S4 LEVEL 4 NRL

VFO A

5379

20 40

60dB

USB

BLANK

DSP

VFO A

5379

20 40

60dB

USB

BLANK

DSP

S4 ANF NR NRL

[DISPLAY]

[MENU]

[M-CH] [F-2]

[F-3]

■Peak meter hold

The peak meter hold function freezes the highest dis-

played bar segment in any meter function for about

0.5 sec. so that you can more easily read the meter.

This function can be turned ON and OFF in initial set

mode (item “23 PEAK HOLD” ; see p. 79).

S1 5379204060dB

Initial reception of a

signal results in an

S-meter reading of

40 dB.

The highest indica-

ted bar remains dis-

played for about 0.5

sec. even when the

signal strength de-

creases.

[EXAMPLE]:

INITIAL SET MODE

FUNCTION FOR TRANSMIT

Split frequency operation allows you to transmit and

receive on two different frequencies. Split frequency

operation uses 2 frequencies, one in VFO A and the

other in VFO B.

Following is an example of setting 7.057 MHz, CW

mode in VFO A (for receiving) and 7.025 MHz, CW

mode in VFO B (for transmitting).

qSelect VFO A and set the frequency to 7.057

MHz/CW.

•[(F-2)A/B] is available when M1 appears.

•[(F-3)V/M] is available when M2 appears.

wPush or push and hold [(F-1)SPL] in the M1 dis-

play.

➥Push [SPL]: activates split only.

➥Push and hold [SPL]: activates the quick split

next page.

eTo change the receive frequency, rotate the main

dial; to change the transmit frequency, rotate the

main dial while pushing [(F-3)XFC].

•The transmit frequency can be monitored while push-

ing [(F-3)XFC].

•Split operation is now set for receive on 7.057 MHz/CW

and transmit on 7.025 MHz/CW.

To exchange the transmit and receive frequencies,

push [(F-2)A/B] in M1.

CONVENIENT

The G3 display conveniently shows the transmit fre-

quency during split frequency operation and pushing

[(F-3)Ñ] allows you to change the transmit frequency.

• Split lock function

The split lock function is convenient for changing only

the transmit frequency. Otherwise, accidentally re-

leasing the [(F-3)XFC] switch while rotating the main

dial changes the receive frequency. The split lock’s ef-

fectiveness can be selected in initial set mode (item

“25 SPLIT LOCK”) for both receive and transmit

frequencies; or only the receive frequency. (p. 80)

5379

20 40

60dB

M1 SPL A/B XFC

SPL

VFO B

VFO A

5379

20 40

60dB

M1 SPL A/B XFC

SPL

VFO A

5379

20 40

60dB

SPL

M1 SPL A/B XFC

[DISPLAY] Main dial[MENU]

[F-1]

[F-2]

[F-3]

■Split frequency operation

FUNCTION FOR TRANSMIT

DQuick split function

In M1, when you push [(F-1)SPL] for 1 sec., split fre-

quency operation is turned ON and VFO B is auto-

matically changed according to the plus/minus

pre-programmed shift frequency set in initial set mode

(or equalized when 0 kHz is programmed as the split

shift frequency). This shortens the time needed to

start split frequency operation—great for DX’ing.

The quick split function is ON by default. If desired, it

can be turned OFF in initial set mode (p. 79). In this

case, pushing [(F-1)SPL] for 1 sec. has the same ef-

fect as pushing [(F-1)SPL] momentarily as in normal

split operation.

PROGRAMMING SPLIT SHIFT FREQUENCY (p.80)

qPush [POWER] to turn power OFF.

wWhile pushing [LOCK], push [POWER] to turn

power ON and enter initial set mode.

eSelect “26 SPL OFFSET” using [MENU], [M-

CH] or the [Y]/[Z] keys, then rotate the main dial

to select the desired split offset.

•The split offset can be selected from –9.999 MHz to

+9.999 MHz.

VFO A

SPL

SPL SPL

SPL

VFO A

VFO B

No shift frequency is programmed.

+10 kHz is programmed as a shift

frequency.

Push for 1 sec.

SPL

F-1

[DISPLAY][MENU]

[F-1]

26 SPL OFFSET

■Meter selection

The bar meter in the function display acts as an

S-meter for relative signal strength during receiving

and can be selected for one of three types during

transmitting.

qSelect M3.

•Push [DISPLAY] once or twice to select M.

• Push [MENU] one or more times to select M3.

wPush [(F-3)MET] one or more times to select the

desired meter function.

• The display indication changes as in the table at right.

[DISPLAY][MENU]

[F-3]

DISPLAY

INDICATION MEASUREMENT

Po Indicates the relative RF output power.

ALC

Indicates the ALC level. When the

meter movement shows the input signal

level exceeds the allowable level, the

ALC limits the RF power. In such cases,

reduce the microphone gain (see

above).

SWR Indicates the SWR over the transmis-

sion line.

6FUNCTION FOR TRANSMIT

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.

qSelect M4.

• Push [DISPLAY] once or twice to select M.

• Push [MENU] one or more times to select M4.

wPush [(F-1)VOX] to toggle the VOX function ON

and OFF.

• “VOX” appears when the function is ON.

ePush [(F-1)VOX] for 1 sec. to enter the VOX set

mode (below), then set the ‘VOX delay,’ ‘VOX gain’

and ‘ANTI-VOX’ if desired.

rSelect “VOX DELAY” in VOX set mode.

•Push [MENU] one or more times to select V1.

•While speaking into the microphone, adjust ‘VOX

DELAY’ as desired.

tSelect “VOX GAIN” in VOX set mode.

•Push [MENU] one or more times to select V2.

•While speaking into the microphone, adjust ‘VOX GAIN’

until the transceiver is transmitting.

ySelect “ANTI VOX” in VOX set mode.

•Push [MENU] one or more times to select V3.

•If the receive audio from the speaker toggles the trans-

ceiver to transmit during receive, adjust the ‘ANTI-VOX’

to the point where it has no effect.

uPush [DISPLAY] to exit VOX set mode.

[DISPLAY][MENU]

[F-1]

Main dail

LSB

VFO A

5379

20 40

60dB

USB CW R

AM WFM

M4 VOX COM AGC

VOX COM

■VOX operation

While M4 is selected in SSB/AM/FM modes, push

[(F-1)VOX] for 1 sec. to enter the VOX set mode.

DVOX set mode

V1 VOX DELAY

This item adjusts the VOX (Voice-activated Transmit)

delay time. The delay time can be adjusted from 0 to

2 sec. in 0.1 sec. steps.

The default is 1.0 seconds.

USB

V2 VOX GAIN

This item adjusts the VOX gain for the VOX (voice ac-

tivated transmit) function.

The default is 5.

USB

V3 ANTI VOX

This item adjusts the ANTI-VOX gain for the VOX

(voice activated transmit) function.

The default is 5.

USB

FUNCTION FOR TRANSMIT

The IC-703 has a built-in, low distortion speech com-

pressor circuit. This circuit increases your average

talk power in SSB mode and is especially useful for

DX’ing when the receiving station is having difﬁculty

copying your signal.

qSelect USB or LSB mode.

wSelect the mic gain display in quick set mode.

• Push [DISPLAY] for 1 sec.

•Push [MENU] one or more times to select “Q2 MIC

GAIN.”

•The ALC meter is selected automatically when operat-

ing in SSB mode.

eAdjust the mic gain.

•While transmitting at your normal voice level, the ALC

meter should read at about the middle of the ALC zone.

• Be sure the mic gain is in the range of 2 to 5.

rSelect the ALC meter.

• Push [DISPLAY] once or twice to select M.

•Push [MENU] one or more times to select M3, then

push [(F-3)MET] one or more times to select “ALC.”

tPush [MENU] one or more times to select M4.

yPush [(F-2)COM] to turn the speech compressor

function ON.

• “COM” appears.

uPush [(F-2)COM] for 1 sec. to enter the compres-

sion level set mode (below).

iRotate the main dial to set the speech compression

level.

NOTE:

When the ALC meter peaks above the ALC

zone, your transmitted voice may be distorted.

ALC

Adjust ‘COMP LEVEL’ so that the ALC meter

reads within the ALC zone.

ALC zone

[DISPLAY][MENU]

[MODE]

Main dail[F-2]

[F-3]

LSB

VFO A

5379

20 40

60dB

USB CW R

AM WFM

M4 VOX COM AGC

VOX COM

■Speech compressor

While M4 is selected in SSB/AM modes, push

[(F-2)COM] for 1 sec. to enter the compression level set

mode.

DCompression level set mode

C1 COMP LEVEL

This item adjusts the speech compression level. The

speech compression level can be adjusted from 0 to

10.

The default is 5.

USB

6FUNCTION FOR TRANSMIT

The IC-703 has a built-in circuit for measuring an-

tenna SWR—no external equipment or special ad-

justments are necessary.

The IC-703 can measure SWR in 2 ways:

(A) Spot measurement; or (B) Plot measurement.

(A) Spot measurement

qConﬁrm that the output power is over 5 W.

wPush [MENU] one or more times to select M3.

ePush [(F-3)MET] to select the SWR meter.

rPush [MODE] one or more times to select CW or

RTTY operation.

•Key down or push [PTT] to transmit; then read the ac-

tual SWR from the meter:

➠≤1.5 well matched antenna

➠>1.5 check antenna or cable connection, etc.

(B) Plot measurement

Plot measurement allows you to measure the SWR

over an entire band.

qConﬁrm that the output power is over 5 W.

wPush [DISPLAY] once or twice to select G.

ePush [MENU] one or more times to select G2.

rSet the center frequency for the SWR to be mea-

sured.

tPush and hold [(F-1)10k] one or more times to se-

lect the desired frequency pitch.

yPush and hold [(F-2)] one or more times to select

the desired step.

uAfter selecting the desired pitch and step, push

[(F-3)STR] to measure the SWR.

• RTTY mode is selected automatically.

iPush and hold [PTT] to display the SWR in a bar

graph readout.

oWhen [PTT] is released, the frequency marker and

frequency indication move to the next frequency to

be measured.

!0 Repeat steps iand oto measure SWR over the

entire frequency range.

!1 When the measured SWR is less than 1.5, the an-

tenna is well matched.

G2 10k STR

Frequency span

Step bar indication

Frequency indication mark

Measure start indicator

[DISPLAY][MENU]

[F-3]

[F-1]

[F-2]

VFO A

SWR

1 1.5 2 3

5379

20 40 60dB

BLANK

SWR 1 1.5 2 3

The best match is in this range.

∞

M3 FIL NB MET

[DISPLAY][MENU]

[F-3]

[MODE]

The antenna is well matched in this range

VFO A

5379

20 40

60dB

BLANK

G2 50k STR

■SWR

DMeasuring SWR

Span Push [F-1] for 1 sec. to change the se-

lected span.

Step bar Push [F-2] to change the step bar (3, 5,

7 or 9 steps are available.

Marker Indicates the currently active step bar.

Start Flashes while the SWR is being mea-

sured.

MEMORY OPERATION

■Memory channels

The transceiver has 105 memory channels (includes 6

scan edge channels). Memory mode is useful for

quickly changing to often-used frequencies.

All 105 memory channels are tuneable which means

the programmed frequency can be tuned temporarily

with the main dial, etc., in memory mode.

qSelect M2 functions.

• Push [DISPLAY] once or twice to select M.

• Push [MENU] one or more times to select M2.

wPush [(F-3)V/M] to select memory mode.

eRotate [M-CH] to select the desired memory chan-

nel.

•All memory channels including blank channels can be

selected.

• [UP]/[DN] on the microphone changes the frequency.

rTo return to VFO mode, push [(F-3)V/M] again.

VFO A

[EXAMPLE]: Selecting memory channel 17.

V/M

F-3

USB

MEMO

SPLIT

MEMO

USB

M-CH SHIFT

[DISPLAY][MENU][M-CH]

[F-3]

■Memory channel selection

NOTE:

During split frequency operation, pro-

grammed memory contents can be called up to the

SUB readout (dot matrix portion of the display).

MEMORY

CHANNEL

MEMORY

CHANNEL

NUMBER

CAPABILITY TRANSFER

TO VFO

OVER-

WRITING CLEAR

Regular

(split memory) 1–99

Independent transmit and receive

frequencies and one mode in each

memory channel.

In addition, tone frequencies can

also be stored for repeater use.

Yes Yes Yes

Scan edges 1A–3B

(3 pairs)

One frequency and one mode in

each memory channel as scan

edges for programmed scan.

Yes Yes No

7MEMORY OPERATION

• Programming in VFO mode

qSelect M2 functions.

• Push [DISPLAY] once or twice to select M.

•Push [MENU] one or more times to select M2.

wSet the desired frequency and operating mode in

VFO mode.

•If you want to program the split frequency function, pro-

gram both receive and transmit frequencies into VFO A

and B, then turn ON the split function.

•If you want to program a repeater function, set a tone

frequency (pgs. 44, 45) in addition to the receive/trans-

mit frequencies.

eRotate [M-CH] to select the desired memory chan-

nel.

•

Select memory mode to conﬁrm the contents, if desired.

•“}” appears if the selected memory channel is a

blank channel (and does not have contents).

rPush [(F-1)MW] for 1 sec. to program the displayed

frequency and operating mode into the memory

channel.

To check the programmed contents, push [(F-3)V/M]

to select memory mode.

VFO A

[EXAMPLE]: Programming 7.088 MHz/LSB into ch 12.

MODE

F-1

LSB

BLANK

SPLIT

VFO A

LSB

VFO A

LSB

VFO A

Push for

1 sec.

M-CH SHIFT

[DISPLAY]

[MENU]

[M-CH]

[F-3]

[F-1]

■Memory programming

• Programming in memory mode

qSelect M2 functions.

• Push [DISPLAY] once or twice to select M.

•Push [MENU] one or more times to select M2.

wSet the desired frequency and operating mode.

ePush [(F-3)V/M] to select memory mode, then se-

lect the desired memory channel with [M-CH].

•Push [Y]/[Z] when you want to program blank chan-

nels.

rPush [(F-1)MW] for 1 sec. to program the displayed

frequency and operating mode into the memory

channel.

[EXAMPLE]:

Programming 21.280 MHz/USB into

ch 18.

MODE

F-1

SPLIT

Push for

1 sec.

MEMO

USB

MEMO

USB

MEMO

USB

M-CH SHIFT

[DISPLAY]

[MENU]

[M-CH]

[F-3]

[F-1]

[Y]

[Z]

MEMORY OPERATION

Any unnecessary memory channels can be cleared.

The cleared memory channels become blank chan-

nels.

qSelect M2 functions.

• Push [DISPLAY] once or twice to select M.

• Push [MENU] one or more times to select M2.

wPush [(F-3)V/M] to select memory mode.

eRotate [M-CH] to select a memory channel to be

cleared.

rPush [(F-2)MCL] for 1 sec. to clear the contents.

•The programmed frequency and operating mode dis-

appear and “}” appears.

tTo return to VFO mode, push [(F-3)V/M] again.

MCL

F-2

SPLIT

Push for

1 sec.

MEMO

USB

MEMO

BLANK

[DISPLAY][MENU][M-CH]

[F-3]

[F-2]

■Memory clearing

■Frequency transferring

The frequency and operating mode can be trans-

ferred from memory mode to VFO mode.

qSelect M2 functions.

• Push [DISPLAY] once or twice to select M.

• Push [MENU] one or more times to select M2.

wSelect VFO mode with [(F-3)V/M].

eSelect a memory channel with [M-CH].

•Select memory mode to conﬁrm the memory channel’s

contents, if desired; then return to VFO mode.

•“}” appears if the selected memory channel is a

blank channel (and does not have contents). In this

case transferring is not possible.

rPush [(F-3)V/M] for 1 sec. to transfer the frequency

and operating mode.

•Transferred frequency and operating mode appear in

the display.

V/M

F-3

SPLIT

Push for

1 sec.

[EXAMPLE]: Transferring contents of memory 16.

Operating frequency: 21.320 MHz/USB (VFO)

Contents of memory 16: 14.020 MHz/CW

VFO A

USB

VFO A

USB

VFO A

M-CH SHIFT

[DISPLAY][MENU][M-CH]

[F-3]

7MEMORY OPERATION

■Memory names

All memory channels (including scan edges) can be

tagged with alphanumeric names of up to 9 charac-

ters each.

All common keyboard characters (ASCII characters

33 to 126) can be used, including numerals and punc-

tuation marks.

•Calling up memory names

qSelect the G4 display.

•Push [DISPLAY] once or twice to select G.

•Push [MENU] one or more times to select G4.

wSelect a memory channel with [M-CH].

•Editing (programming) memory names

qCall up the desired memory (channel) name as

above.

wPush [(F-3)É] to enter memory name edit mode.

•“[DEL]” appears brieﬂy, then a cursor blinking under

the ﬁrst character position.

eRotate the main dial to select the desired charac-

ter, then advance the cursor position.

•Pushing [(F-3)Ç] moves the cursor to the right; [(F-1)Å]

moves the cursor to the left.

• Pushing [(F-2)] deletes the character.

rRepeat this procedure until all desired characters

have been selected.

tPush [(MENU)Ä] to exit memory name edit mode.

•The G4 display re-appears and the programmed mem-

ory name is displayed.

G4 memory name

G4 Repeater É

ÄÅÖ

[DEL]

F-3

ÄÅR

ÄÅRe Ç

ÄÅRepeaterÖÇ

[DISPLAY][M-CH]

[F-3]

[F-1]

Main dial

[MANU] [F-2]

•Writing frequencies and operating modes

into memo pads

qSelect the S1 display.

• Push [DISPLAY] once or twice to select S.

• Push [MENU] one or more times to select S1.

wPush [(F-2)MPW] to program the frequency into a

memo pad.

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.

NOTE:

Each memo pad must have its own unique

combination 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 [(F-3)MPR]

in the S1 display.

• Make sure S1 is selected in advance.

• Both VFO and memory modes can be use.

• 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 [(F-3)MPR], 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 [(F-3)MPR] one or more times.

NOTE:

If you change the frequency or operating

mode called up from a memo pad, the frequency

and operating mode in the temporary pad are

erased.

Displayed frequency and mode

Push

Newest

MP5

MP4

MP3

MP2

MP1

The oldest written frequency

and mode are erased.

Oldest

MPW

F-2

USB

[DISPLAY]

[F-3]

[MANU] [F-2]

MEMORY OPERATION

VFO or

MEMORY

mode

MEMO PADS

MPR

F-3

MPR

F-3

USB

MP5

MP4

MP3

MP2

MP1

■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 initial set mode if desired

(p. 80).

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

station is busy for a long time and you want to tem-

porarily search for other stations.

Use the transceiver’s memo pads instead of relying on

hastily scribbled notes that are easily misplaced.

SCAN OPERATION

■Scan types

■Preparation

• Channels

For programmed scan: Program scan edge frequen-

cies into scan edge memory channels 1A and 1B.

(p. 57)

For memory scan: Program 2 or more memory chan-

nels except scan edge memory channels.

For memory select scan: Designate 2 or more mem-

ory channels as select memory channels—select a

memory channel, then push [(F-2)SEL] in the S2 dis-

play (memory mode) to designate the channel as a se-

lect memory channel.

For priority watch: Program 1 memory channel to be

watched.

• Scan resume ON/OFF

You can select the scan to resume or cancel when de-

tecting a signal, in initial set mode, item “27 SCAN

RESUME”. Scan resume ON/OFF must be set before

operating a scan. See p. 80 for ON/OFF setting and

scan resume condition details.

•Scan speed

Scan speed can be selected from 2 levels, high or low,

in initial set mode. See p. 80 for details.

• Squelch condition

PROGRAMMED SCAN

Repeatedly scans between two scan edge frequencies

(scan edge memory channels 1A and 1B).

This scan operates in VFO mode.

SELECTED MEMORY SCAN

Repeatedly scans all selected memory channels.

PRIORITY WATCH

Checks for signals on a memory while operating on a

VFO frequency.

This scan operates in memory mode.This scan operates in memory mode.

This scan operates in VFO mode.

Scan

Scan edge 1A or 1B Scan edge 1B or 1A

Jump

Mch 1 Mch 5

Memory

channel

VFO

frequency

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

BLANK

S(select)

S(select)S(select)

S(select) S(select)

S(select)

S(select)S(select)

S(select) S(select)

BLANK

SCAN

STARTS

WITH

PROGRAMMED

SCAN

MEMORY SCANS

PRIORITY WATCH

SQUELCH

OPEN

The scan continues

until it is stopped man-

ually, and does not

pause even if it de-

tects signals.

This is not applicable

when the scan re-

sume is OFF and a

programmable step

(more than 1 kHz) is

selected.

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 initial 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.

SCAN OPERATION

qSelect VFO mode.

wSelect the desired operating mode.

•The operating mode can also be changed while scan-

ning.

eSet [SQL] open or closed.

• See page a left for squelch condition.

rSelect S2.

• Push [DISPLAY] once or twice to select S.

•Push [MENU] one or more times to select S2.

tPush [(F-1)SCN] to start the scan.

• Decimal point blinks while scanning.

yWhen the scan detects a signal, the scan turns

OFF, pauses or ignores it depending on the re-

sume setting and the squelch condition.

•During scan [TS] can be used only when resume is ON.

uTo cancel the scan push [(F-1)SCN].

NOTE:

If the same frequencies are programmed

into the scan edge memory channels 1A and 1B,

programmed scan does not start.

VFO A

53792040

60dB

USB

S2 SCN PRI V/M

Select

VFO mode

F-1 then push [(F-1)SCN]

[DISPLAY]

[F-1]

[MANU][SQL]

■Programmed scan operation

qSelect memory mode.

wClose the squelch with [SQL].

eSelect S2.

• Push [DISPLAY] once or twice to select S.

•Push [MENU] one or more times to select S2.

rPush [(F-1)SCN] to start the scan.

• Decimal point blinks while scanning.

tWhen the scan detects a signal, the scan stops or

pauses depending on the resume setting.

yTo cancel the scan push [(F-1)SCN].

NOTE:

Two or more memory channels must be

programmed for memory scan to start.

S2 SCN SEL V/M

Select

memory mode

F-1 then push [(F-1)SCN]

MEMO

53792040

60dB

USB

[DISPLAY]

[F-1]

[MANU][SQL]

■Memory scan operation

8SCAN OPERATION

qSelect VFO mode, then set a frequency.

wClose the squelch with [SQL].

eSet the desired memory channel as the watching

channel.

rSelect S2.

• Push [DISPLAY] once or twice to select S.

•Push [MENU] one or more times to select S2.

tPush [(F-2)PRI] to start the priority watch.

• Decimal point blinks while scanning.

yWhen the scan detects a signal, the scan pauses

for 10 sec. or until the signal disappears, depend-

ing on the resume setting.

uTo cancel the scan push [(F-2)PRI].

NOTE:

The paused condition when detecting a sig-

nal differs depending on the scan resume condi-

tion. (p 80)

resume on: pauses for 10 sec.

resume off: pauses until the signal disappears.

S2 SCN PRI V/M

Select

VFO mode

Select watching

channel

F-2 Push [(F-2)PRI].

53792040

60dB

USB

VFO A

[DISPLAY][MANU] [F-2][SQL]

qSelect memory mode.

wClose the squelch with [SQL].

eSelect S2.

• Push [DISPLAY] once or twice to select S.

•Push [MENU] one or more times to select S2.

rPush [(F-1)SCN] to start the memory scan.

• Decimal point blinks while scanning.

tPush [(F-2)SEL] to change the memory scan to se-

lect memory scan.

•Push [(F-2)SEL] for 2 sec. to clear all select memory

channels.

yWhen the scan detects a signal, the scan stops or

pauses depending on the resume setting.

uTo cancel the scan push [(F-1)SCN].

NOTE:

Two or more memory channels must be

designated as select memory channels for select

memory scan to start (see p. 61).

S2 SCN SEL V/M

Select

memory mode

Designate

“S.”

F-1 F-2

Push [(F-1)SCN], then [(F-2)SEL].

MEMO

53792040

60dB

USB

[DISPLAY]

[F-1]

[MANU] [F-2][SQL]

■Select memory scan operation

■Priority watch

ANTENNA TUNER OPERATION

The internal automatic antenna tuner matches the

transceiver to the connected antenna automatically.

Once the tuner matches an antenna, the latching relays

combination are memorized as a preset point for each

frequency range (100 kHz steps). Therefore, when you

change the frequency range, the latching relays are au-

tomatically preset to the memorized combination.

CAUTION: NEVER transmit with the tuner ON

when no antenna is connected. This will damage

the transceiver. Be careful of the antenna selection.

Push [TUNER] to turn the internal antenna tuner

ON. The antenna is tuned automatically when the

antenna SWR is higher than 1.5:1.

•When the tuner is ON, the ‘TUNER’ indicator lights red.

• MANUAL TUNING

Push [TUNER] for 1 sec., to start manual tuning.

•A side tone is emitted and ‘TUNER’ indicator blinks

while tuning.

•If the tuner cannot reduce the SWR to less than 1.5:1

after 20 sec. of tuning, the ‘TUNER’ indicator goes out.

• 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 can be turned ON in initial set mode

(p. 81).

• TUNER RESET

qMake sure the transceiver power is OFF.

wWhile pushing [Y] and [Z], push [POWER] to turn

power ON.

•“CLEAR ? OK” appears as shown below.

eRotate main dial to select tuner reset.

rThen Push [F-3] for 1 sec to start tuner resetting.

• The memorized tuner settings are reset.

[TUNER]

TUNER

Lights to indicate internal tuner is activated.

CLEAR ? OK

F 3

[POWER]

[Y]

[Z]

DIf the tuner cannot tune the antenna

Check the following and try again:

• 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 power source voltage/capacity.

If the tuner cannot reduce the SWR to less than

1.5:1 after checking the above, perform the follow-

ing:

• 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.)

•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:

NOTES:

•The internal antenna tuner can tune the HF to 50 MHz

bands.

•NEVER transmit without an antenna properly connected

to antenna port in use.

•If the SWR is higher than about 1.5:1 when tuning

above 100 kHz on an antenna’s preset point, push

[TUNER] for 1 sec. to start manual tuning.

•When strong impact is applied, the internal tuner may

not work properly caused by the latching relay is off po-

sition. In this case, push [POWER] momentarily to reset

the all latching relays while transceiver power is ON.

DInternal antenna tuner

DTuner operation

■Antenna tuner operation

9ANTENNA TUNER OPERATION

The AT-180 automatic antenna tuner matches the IC-

703 to the connected antenna automatically. Once the

tuner matches an antenna, the variable capacitor an-

gles are memorized as a preset point for each fre-

quency range (100 kHz steps). Therefore, when you

change the frequency range, the variable capacitors

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.

•The AT-180 can match both HF and 50 MHz bands.

However, operation is different for the HF and 50

MHz bands.

TUNER OPERATION

• For the HF band:

Push [TUNER] to turn the tuner ON. The antenna is

tuned automatically during transmission when the an-

tenna SWR is higher than 1.5:1.

• When the tuner is OFF, the [TUNER] light goes out.

• For the 50 MHz band:

Push [TUNER] for 1 sec. to tune the antenna. If the

[TUNER] light ﬂashes slowly while transmitting, push

and hold [TUNER] for 1 sec. again to re-tune the an-

tenna.

MANUAL TUNING

During SSB operation on HF bands at low voice lev-

els, the AT-180 may not be tuned correctly. In such

cases, manual tuning is helpful.

Push [TUNER] for 1 sec. to start manual tuning.

•CW mode is selected, a side tone is emitted, and the

[TUNER] light ﬂashes; then, the previous mode is selected.

If the tuner cannot reduce the SWR to less than 1.5:1

after 20 sec. of tuning, the [TUNER] light goes out. In

this case, check the following:

• the antenna connection and feedline

• the antenna SWR (p. 55; meter function)

Through inhibit (HF bands only)

The AT-180 has a through inhibit condition. When se-

lecting this condition, the tuner can be used at poor

SWR’s. In this case, automatic tuning in the HF bands

activates only when exceeding SWR 3:1. Therefore,

manual tuning is necessary each time you change the

frequency. Although termed “through inhibit,” the tuner

will be “through” if the SWR is higher than 3:1 after

tuning.

• Tuner sensitive condition (HF bands only)

If you require critical tuning at any time during trans-

mission, select the tuner sensitive condition. See

p. 81 for selection.

• Automatic tuner start (HF bands only)

If you want to turn OFF the tuner under conditions of

VSWR 1.5:1 or less, use “automatic tuner on” and

turn the tuner OFF. See p. 81 for turning the function

ON and OFF.

CONVENIENT

[TUNER]

Push and hold for 1 sec. to start manual tuning.

[TUNER]

TUNER

Flashes to indicate

re-tuning is necessary.

DOptional AT-180

AUTOMATIC ANTENNA TUNER

operation

DOptional external tuner operation

[TUNER]

TUNER

Lights to indicate AT-180

is turned ON.

The IC-703 automatically detects and selects an optional

external tuner (AT-180/AH-4) when connected. In this

case, the internal tuner switches to the through function.

NOTE: When the connected power supply voltage

is lower than 11.0 V, the transceiver automatically

switches to the battery operating mode (power sav-

ing mode). In this case, the transceiver can not drive

an external antenna tuner.

NOTE: When connecting the optional antenna tuner

AT-180, the IC-703’s output power must be set max-

imum (10 W) both in quick set mode and initial set

mode. Otherwise, the AT-180 may not be tuned cor-

rectly.

(AT-180’s minimum operating input power is 8 W.)

ANTENNA TUNER OPERATION

The AH-4 matches the IC-703 to a long wire antenna

more than 7 m/23 ft long (3.5 MHz and above).

• See p. 16 for connection.

•See the AH-4 instruction manual for AH-4 installation and

antenna connection details.

NEVER operate the AH-4 without an antenna wire.

The tuner and transceiver will be damaged.

NEVER operate the AH-4 when it is ungrounded.

Transmitting before tuning may damage the trans-

ceiver. Note that the AH-4 cannot tune when using a

1⁄2λ long wire or multiple of the operating frequency.

AH-4 operation

qSet the desired frequency in an HF band.

•The AH-4 will not operate on frequencies outside of

ham bands.

wPush [TUNER] for 1 sec.

•The [TUNER] light ﬂashes and “CW” appears while tun-

ing.

eThe [TUNER] light lights constantly when tuning is

complete.

•When the connected wire cannot be tuned, the

[TUNER] light goes out, the AH-4 is bypassed and the

antenna wire is connected to the antenna connector on

the transceiver directly.

rTo bypass the AH-4 manually, push [TUNER].

• PTT tune function

The AH-4 is always tuned when the PTT is pushed

after the frequency is changed (more than 1%). This

function removes the “push and hold [TUNER]” oper-

ation and activates ﬁrst transmission on the new fre-

quency. This function is turned ON in initial set mode,

item 34 (p. 81).

[TUNER]

Push [TUNER] for 1 sec.

USB

AH-4 setting example:

For mobile operation

For outdoor operation

Long wire

Optional AH-2b

antenna element

DOptional AH-4

AUTOMATIC ANTENNA TUNER

operation

RDANGER!: HIGH VOLTAGE!

NEVER touch the antenna element while tuning or

transmitting.

Tuning is required for each frequency. Be sure to

re-tune the antenna before transmitting when you

change the frequency—even slightly.

CONVENIENT

DATA COMMUNICATION

DWhen connecting to [DATA] socket

DWhen connecting to [ACC] socket

[ACC]

Rear panel

123

765

1011

Rear panel

view

Colors refer to connection

to the supplied ACC cable.

*1Connect SQL line when required.

MSEND (orenge)

GND (red)

SQL*1 (light green)

AF in (pink)

AF out (light blue)

TU or TNC

Personal computer

DWhen connecting to [MIC] connector

[MIC]

Rear panel

➇ SQL

➂ AF out ➃ PTT

➄ GND ➅ MIC

➆ GND

Rear panel

view TU or TNC

Personal computer

■Connections for packet

Rear panel

Personal computer

DATA

TNC SIDE

TU or TNC

RS-232C

PTT

PTTP

DATA IN

SQL

RX AUDIO

GND

TX AUDIO

AF OUT

DATA OUT

GND

DATA COMMUNICATION

Before operating packet (AFSK) be sure to consult

the operating manual that came with your TNC.

qConnect a TNC and PC as left page.

wPush [(Y)BAND]/[(Z)BAND] to select the desired

band.

ePush [MODE] momentarily to select SSB (LSB)

mode (or select SSB-D mode).

•After USB mode is selected, push [MODE] for 1 sec.

to toggle between USB and LSB modes.

•After RTTY mode is selected, push [MODE] for 1 sec.

to toggle between RTTY and SSB-D modes.

•Generally, LSB is used on the HF bands and FM is

used for the 50 MHz band.

rRotate [AF] to set audio to a comfortable listening

level.

tRotate the main dial to tune a desired signal.

• S-meter indicates received signal strength.

yTransmit your AFSK signals using your computer’s

keyboard.

• The TX indicator lights red.

NOTE: When connecting a TNC to the ACC socket

on the rear panel, select SSB-D mode or discon-

nect the microphone and adjust ‘MIC GAIN’ to 0 in

quick set mode.

When SSB-D mode is selected, the audio input

from the [MIC] connector is automatically cut, and

the audio input from the [ACC] is used.

LSB

VFO A

5379

20 40

60dB

USB CW R

AM WFM

M4 1/4 TON AGC

[TX] indicator [MODE] Main dial[AF]

[Y]

[Z]

“USB” or “LSB” blinks when

SSB-D mode is selected.

■Packet (AFSK) operation

When operating AFSK in SSB mode, the indicated

frequency is the signals carrier point.

• Example— SSB-D mode

Mark freq.: 2125 Hz

Shift freq.: 200 Hz

2325 Hz

200 Hz 2125 Hz

Carrier point

(Displayed frequency)

DFrequency indication during AFSK operation

10 DATA COMMUNICATION

qPush [MODE] one or more times to select RTTY

mode.

wPush [MODE] for 1 sec. to SSB-D mode.

•After RTTY mode is selected, push [MODE] for 1 sec.

to toggle between RTTY and SSB-D modes.

NOTE: When SSB-D mode is selected, the audio

input from the [MIC] connector is automatically cut,

and the audio input from the [ACC] is used.

OPERATING MODE SELECTION

MODE

Push

momentarily

Memory keyer

set mode

MODE

Push

for 1 sec.

USB LSB

FM AM

SSB-D

RTTY

[MODE]

qSelect SSB-D mode with [MODE].

wPush [DISPLAY] for 1 sec. to enter quick set mode.

ePush [MENU] one or more times to select “Q2

CAR SIDE,” then rotate the main dial to select

“U” (USB mode) or “L” (LSB mode).

[MODE]

Main dial[DISPLAY][MENU]

DSSB-D mode selection

DCarrier point setting QUICK SET MODE

DATA COMMUNICATION

DAdjusting the transmit signal from the TNC

NOTE: For packet operation the transceiver can be

set to one of two data speeds: 1200 bps or 9600

bps. Data speed is set in initial set mode (item “36

9600 MODE”; see p.81).

qPush [POWER] for 1 sec. to turn power OFF.

wWhile pushing [LOCK], push [POWER] to turn

power ON.

• Initial set mode is selected and one of its items ap-

pears.

ePush [MENU] one or more times to select the item

“36 9600 MODE.”

• [M-CH] or [Y]/[Z] can also be used.

rRotate the main dial to select the data speeds:

1200 bps or 9600 bps.

tTo exit initial set mode, push [POWER] for 1 sec.

to turn power OFF.

yPush [POWER] to turn power ON again.

•The conditions selected in initial set mode are now ef-

fective.

When setting data transmission speed to 9600 bps,

the

DATA

signal coming from the TNC is applied ex-

clusively to the internal limiter circuitry to automati-

cally maintain bandwidth.

NEVER apply data levels from the TNC of over 0.6

Vp-p, otherwise the transceiver will not be able to

maintain the band width and may possibly interfere

with other stations.

NOTE: Read the instructions supplied with your

TNC carefully before attempting packet operation

with the IC-703.

1.When using a level meter or synchroscope, adjust

the TX audio level (

DATA IN

level) from the TNC as

follows.

0.4 Vp-p (0.2 Vrms): recommended level

0.2 Vp-p–0.5 Vp-p (0.1 Vrms–0.25 Vrms):

acceptable level

2.When not using a measuring device.

qConnect the IC-703 to a TNC.

wEnter a test mode (“CAL”, etc.) on the TNC, then

transmit some test data.

eWhen the transceiver fails to transmit test data or

transmits sporadically (TX indicator doesn’t appear

or ﬂashes):

Decrease the TNC output level until the transmit

indicator lights continuously.

When transmission is not successful even though

the TX indicator lights continuously:

Increase the TNC output level.

Main dial[LOCK][MENU]

[MODE] Main dial[POWER]

[Y]

[Z]

CONTROL COMMAND

CONTROLLER TO IC-703

FE FE 68 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 68 E0 FB FD

Preamble code (fixed)

Transceiver’s default address

Controller’s default address

OK code (fixed)

End of message code (fixed)

NG MESSAGE TO CONTROLLER

FE FE 68 E0 FA FD

Preamble code (fixed)

Transceiver’s default address

Controller’s default address

NG code (fixed)

End of message code (fixed)

IC-703 TO CONTROLLER

FE FE E0 68 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)

DCI-V connection example

The transceiver can be connected through an optional

CT-17

V LEVEL CONVERTER

to a personal computer

equipped with an RS-232C port. The Icom Communi-

cation interface-V (CI-V) controls the following func-

tions of the transceiver.

Up to four Icom CI-V transceivers or receivers can be

connected to a personal computer equipped with an

RS-232C port. See p. 82 for setting the CI-V condition

using initial set mode.

DData format

The CI-V system can be operated using the following

data formats. Data formats differ according to com-

mand numbers. A data area is added for some com-

mands.

Personal

computer

IC-703

9–15 V DC

■Remote jack (CI-V) information

CONTROL COMMAND

Command table

Command Sub command Description

00 — Send frequency data

01 Same as Send mode data

command 06

02 — Read band edge frequencies

03 — Read operating frequency

04 — Read operating mode

05 — Set operating frequency

06 00 Select LSB

01 Select USB

02 Select AM

03 Select CW

04 Select RTTY

05 Select FM

07 Select CW-R

08 Select RTTY-R

07 — Select VFO mode

00 Select VFO A

01 Select VFO B

A0 Equalize VFO A and VFO B

B0 Exchange VFO A and VFO B

08 — Select memory mode

0001–0105* Select memory channel

*1A=0100, 3b=0105

09 — Memory write

0A — Memory to VFO

0B — Memory clear

0E 00 Scan stop

01 Programmed/memory scan start

0F 00 Turn the split function OFF

01 Turn the split function ON

10 00 Select 10 Hz (1 Hz) tuning step

01 Select 100 Hz tuning step

02 Select 1 kHz tuning step

03 Select 5 kHz tuning step

04 Select 9 kHz tuning step

05 Select 10 kHz tuning step

06 Select 12.5 kHz tuning step

07 Select 20 kHz tuning step

08 Select 25 kHz tuning step

09 Select 100 kHz tuning step

11 — Select/read attenuator (00=OFF,

20=ON (20 dB))

13 00 Announce with voice synthesizer

01 (00=all data; 01=frequency and

02 S-meter level; 02=operating mode)

14 01 + Level data [AF] level setting (0=max. CCW to

255=max. CW)

02 + Level data [RF] level setting (0=max. CCW to

255=11 o’clock)

03 + Level data [SQL] level setting (0=11 o’clock to

255=max. CW)

04 + Level data [IF SHIFT] position setting (0=max.

CCW; 128=center; 255=max. CW)

06 + Level data Noise reduction level setting

(0=min. to 255=max.)

07 + Level data Twin PBT (inside) setting (0=max.

CCW, 128=center, 255=max. CW)

08 + Level data Twin PBT (outside ) setting

(0=max. CCW, 128=center,

255=max. CW)

09 + Level data CW pitch setting (0=300 Hz,

128=600 Hz, 255=900 Hz)

Command Sub command Description

14 0A + Level data RF power setting (0=mini. to

255=max.)

0B + Level data Microphone gain setting (0=mini.

to 255=max.)

0C + Level data Key speed setting (0=slow to

255=fast)

0E + Level data

COMP Level setting (0=0 to 10=10)

0F + Level data Break-IN DELAY setting (20=2.0d

to 130=13.0d)

15 01 Read squelch condition

02 Read S-meter level

11 Read RF power meter

12 Read SWR meter

13 Read ALC meter

16 02 Preamp (0=OFF; 1=preamp 1;

2=preamp 2)

12 AGC selection (1=Fast; 2=Slow)

22 Noise blanker (0=OFF; 1=ON)

40 Noise reduction (0=OFF; 1=ON)

41 Auto notch (0=OFF; 1=ON)

42 Subaudible tone (0=OFF; 1=ON)

43 Tone squelch (0=OFF; 1=ON)

Speech compressor (0=OFF; 1=ON)

45 Monitor (0=OFF; 1=ON)

46 VOX function (0=OFF; 1=ON)

47 Break-in (0=OFF; 1=semi break-

in; 2=full break-in)

19 00 Read the transceiver ID

1A 00 Send/read memory contents

01 Send/read band stacking register

contents (see p. 73 for details)

02 Send/read memory keyer con-

tents (see p. 73 for details)

0301 Send/read beep emission set

(0=OFF, 1=ON)

0302 Send/read band edge beep set

(0=OFF, 1=ON)

0303 Send/read beep output level set

(0=min. to 255=max.)

0304 Send/read beep limit set (0=OFF,

1=ON)

0305 Send/read CW carrier point set

(0=LSB, 1=USB)

0306 Send/read CW side tone level set

(0=min. to 255=max.)

0307 Send/read CW side tone limit set

(0=OFF, 1=ON)

0308 Send/read 9600 bps mode set

(0=OFF, 1=ON)

0309 Send/read VOX gain set (0=min.

to 255=max.)

0310 Send/read anti VOX gain set

(0=min. to 255=max.)

0311 Send/read VOX delay time set

(0=0 sec. to 20=2.0 sec.)

0312 Send/read meter selection

(0=Power, 1=SWR, 3=ALC)

0313 Send/read SSB carrier frequency

(00=–200 Hz to 40=200 Hz;

10 Hz steps)

CW: Clockwise, CCW: Counter Clockwise

11 CONTROL COMMAND

Command table (continued)

DBand stacking register

To send or read the desired band stacking register’s con-

tents, combined code of the frequency band and register

codes as follows are used.

For example, when sending/reading the contents in the

21 MHz band, the code “0701” is used.

• Frequency band code

• Register code

DCodes for memory keyer contents

To send or read the desired memory keyer contents, the

channel and character codes as follows are used.

• Channel code

• Character’s code

DCodes for memory name contents

To send or read the desired memory name settings, the

character codes, instructed codes for memory keyer con-

tents as above, and follows are additionally used.

•Character’s code— Alphabetical characters

•Character’s code— Symbols

Command Sub command Description

1A 0314 Send/read RTTY marker fre-

quency (0=1275 Hz, 1=1615 Hz,

2=2125 Hz)

0315 Send/read RTTY shift width

(0=170 Hz, 1=200 Hz, 2=425 Hz)

0316 Send/read RTTY keying polarity

(0=Normal, 1=Reverse)

0317 Send/read noise blanker level

(0=min. to 255=max.)

0318 Send/read key type (0=Normal,

1=Reverse, 2=Bug, 3=OFF,

4=Mic. [UP]/[DN])

0319 Send/read CW keyer dot/dash

ratio (28=1:1:2.8 to 45=1:1:4.5)

0320 Send/read CW keyer repeat time

(01=1 sec. to 60=60 sec.)

0321 Send/read CW keyer transmission

indication (0=Normal, 1=First 3-

character, 2= First 3-character+

contact number)

0322 Send/read contact number style

(0=Normal, 1=190→ANO,

2=190→ANT, 3=90→NO,

4=90→NT)

0323 Send/read count up trigger chan-

nel (1=MK1, 2=MK2, 3=MK3)

0324

Send/read present number (1–999)

04 Send/read DATA mode (0=OFF,

1=ON)

1B 00 Set/read repeater tone frequency

01 Set/read TSQL tone frequency

1C 00 Set/read the transceiver’s condi-

tion (0=Rx; 1=Tx)

01 Set/read antenna tuner condition

(0=OFF, 1=ON, 2=Start tuning or

while tuning)

Character ASCII code Character ASCII code

a–z 61–7A — —

Code Freq. band Frequency range (unit: MHz)

01 1.8 1.800000–1.999999

02 3.5 3.400000–4.099999

03 7 6.900000–7.499999

04 10 9.900000–10.499999

05 14 13.900000–14.499999

06 18 17.900000–18.499999

07 21 20.900000–21.499999

08 24 24.400000–25.099999

09 28 28.000000–29.999999

10 50 50.000000–54.000000

11 GENE Other than above

Character ASCII code

Description

0–9 30–39 Numerals

A–Z 41–5A Alphabetical characters

space 20 Word space

/ 2F Symbol

? 3F Symbol

, 2C Symbol

. 2E Symbol

^ 5E e.g., to send

, enter ^4254

✱2A Inserts contact number (can be

used for 1 channel only)

Code Channel number

01 MK1

02 MK2

03 MK3

Character ASCII code Character ASCII code

!21#23

$24%25

&26¥5C

?3F ” 22

’27`60

+2B–2D

:3A;3B

=3D<3C

>3E ( 28

)29[5B

]5D{7B

}7D|7C

_5F–7E

Code Registered number

01 1

SET MODE

■General

Set mode is used for programming infrequently

changed values or conditions of functions. The IC-703

has 2 separate set modes: quick set mode and initial

set mode.

qWhile power is ON, push [DISPLAY] for 1 sec.

•Quick set mode is selected and one of its items ap-

pears.

•Quick set mode items vary depending on the selected

operating mode (SSB, FM, etc.).

wPush [MENU] one or more times to select the de-

sired item.

• [M-CH] or [Y]/[Z] can also be used.

eRotate the main dial to set the values or conditions

for the selected item.

rRepeat steps wand eto set other items.

tTo exit quick set mode, push [DISPLAY] momen-

tarily.

[MENU] [DISPLAY][M-CH]

[POWER] Main dial

[Y]

[Z]

Q1 RF POWER

USB

Item number

Item

Value or

condition

[DISPLAY EXAMPLE: QUICK SET MODE]

53792040

60dB

DQuick set mode operation

qPush [POWER] for 1 sec. to turn power OFF.

wWhile pushing [LOCK], push [POWER] to turn

power ON.

• Initial set mode is selected and one of its items ap-

pears.

ePush [MENU] one or more times to select the de-

sired item.

• [M-CH] or [Y]/[Z] can also be used.

rRotate the main dial to set the values or conditions

for the selected item.

tRepeat steps eand rto set other items.

yTo exit initial set mode, push [POWER] for 1 sec.

to turn power OFF.

uPush [POWER] to turn power ON again.

•The conditions selected in initial set mode are now ef-

fective.

[MENU] [LOCK][M-CH]

[POWER] Main dial

[Y]

[Z]

Item number

Item

Value or

condition

1 MAX POWSET

[DISPLAY EXAMPLE: INITIAL SET MODE]

DInitial set mode operation

■Quick set mode items

Q1 RF POWER (all modes)

This item adjusts the RF output power. The RF out-

put power can be adjusted from L, 1 to 9 and H for in-

dication, however, it can be adjusted continuously.

The default is H (maximum power).

Note that while adjusting the output

power, the power meter is displayed

automatically.

Q2 MIC GAIN (SSB/AM/FM modes)

This item adjusts microphone gain from 1 to 10 for in-

dication, however, it can be adjusted continuously.

The default is 5.

Note that while adjusting mic gain, the

ALC meter is displayed automatically.

Q2 KEY SPEED (CW mode)

This item adjusts the CW key speed. The key speed

can be selected from 6 to 60 wpm.

The default is 20 wpm.

Q2 RTTY REV (RTTY mode)

This item selects RTTY or åRTTY (RTTY reverse)

mode.

The default is normal.

Q3 CW REV (CW mode)

This item selects CW or CWå(CW reverse) mode.

The default is normal.

Q3 CARRIER Frq (SSB mode)

This item adjusts the carrier frequency (BFO fre-

quency), allowing you to change the audio character-

istics. Selectable values are –200 to +200 Hz in 10 Hz

steps.

USB

The default is 0 Hz.

Q2 CAR SIDE (SSB-D mode)

This item selects the carrier point. USB mode or LSB

mode are selectable.

The default is LSB mode.

LSB

12 SET MODE

Mode Set mode item Default setting

Q1 RF POWER H

SSB Q2 MIC GAIN 5 level

Q3 CARRIER Frq 0 [Hz]

Q1 RF POWER H

CW Q2 KEY SPEED 20 [WPM]

Q3 CW REV n (normal)

Mode Set mode item Default setting

RTTY Q1 RF POWER H

Q2 RTTY REV n (normal)

SSB-D Q1 RF POWER H

Q2 CAR SIDE L (LSB side)

FM/AM Q1 RF POWER H

Q2 MIC GAIN 5 level

When “3 SIMPLE MODE” is set to ON, * marked items are undisplayed. 76

SET MODE

4 MODE SELECT (Mode Availavility)

This item is available in all modes, and allows you to

simplify operation by inhibiting the selection of un-

needed operating modes during normal operation.

For example if you are operating mobile and only plan

on using FM and AM modes, use “4 MODE SE-

LECT” to inhibit access to all other modes (SSB, CW,

RTTY), thereby making selection of AM or FM quick

and easy.

The default is on for all operating

modes. To toggle an operating mode

on or off, push (or push and hold)

[MODE] one or more times until the

desired mode is displayed, then rotate

the main dial to set on or off.

*5 MODE POWSET

This item allows you to set the output power for each

operating mode.

on : Output power can be set for each mode groups.

oFF: Same output power for every mode.

The mode groups are separated ‘SSB-D/USB/LSB,’

‘CW’ and ‘RTTY/AM/FM.’

The default is OFF.

■Initial set mode items

2 PoSAVE MODE

The power save mode reduces the current drain to

conserve battery power. This function is convenience

for battery operation.

AUTO : The power save function starts in 1:1 (200

msec.:200 msec.) ratio when no signal is re-

ceived for 5 sec., then the ratio becomes in

1:4 (200 msec.:800 msec.) and 1:8 (200

msec.:1600 msec.) after no signal is received

every 60 sec. are past.

(1 :) 1, 4, 8, 16:

The power save function activates selected

ratio.

oFF : The power save function does not activate.

The default is OFF.

3 SIMPLE MODE

This item select the simple mode and normal mode.

on : Simple mode is selected. (*) marked items in initial

set mode are hidden, and push [DISPLAY] to se-

lect Main menu or Sub menu only, Graphic menu

also hidden.

oFF : Normal mode is selected.

Simple mode ON Simple mode OFF

(default)

1 MAX POWSET

This item selects maximum output power. The max.

power is can be set 10, 5, 2.5, 1 or 0.5 W.

The default is 10 W.

(Output power setting for modes)

(Max. output power setting)

(Power save setting)

(Simple mode setting)

12 SET MODE

*10 CW NOR SIDE

This item select the carrier point of CW mode from

LSB and USB.

The carrier point is

LSB side (default).

The carrier point is

USB side.

6 BEEP (Conﬁrmation beeps)

A beep sounds each time a switch is pushed to con-

ﬁrm it. This function can be turned OFF for silent op-

eration.

Confirmation beep ON

(default)

Confirmation beep OFF

*7 BAND BEEP (Band edges beep)

A beep sounds when an operating frequency enters or

exits a transmit frequency range. This functions inde-

pendent of the conﬁrmation beep setting (above).

Band beep ON

(default)

Band beep OFF

8 BEEP LEVEL

When “6 BEEP” is set ON, this item adjust the con-

ﬁrmation beep level. Adjustable levels are 0 to 10 in 1

steps.

The default is 5.

*9 BEEP 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.

Beep limit ON

(default)

Beep limit OFF

*12 SID-T LIMIT

This item sets the CW side tone level limit. When the

[AF] control is rotated above a speciﬁed level, the CW

side tone does not increase.

on : CW side tone level is limited. (default)

oFF : CW side tone level is not limited.

CW side tone limit ON

(default)

CW side tone limit OFF

11 SID-T LEVEL

This item sets the CW side tone output level. Selec-

table levels are 0 to10 in 1 steps.

The default is 5.

(Beep audio level limit)

(CW carrier point setting)

(CW side tone level)

(CW side tone level limit)

When “3 SIMPLE MODE” is set to ON, * marked items are undisplayed.

(Beep level adjustment)

SET MODE

*18 AUTO OFF

The auto power OFF function can be used to auto-

matically turn the transceiver OFF after a specified

time of operation. This item can be set to 30 min., 60

min., 90 min., 120 min., or OFF.

Auto power OFF set to

20 min.

Auto power OFF

deactivates. (default)

*13 SYNC TUNING

This item selects the displayed frequency shift func-

tion from ON and OFF.

When this function is activated, the receiving signal

can be kept in receive even when the operating mode

is changed between SSB and CW.

oN : The displayed frequency shifts when the oper-

ating mode is changed between SSB and CW.

oFF: The displayed frequency does not shift. (default)

The frequency shifting value may differ according

to the CW pitch setting.

Synchronous tuning ON Synchronous tuning OFF

(default)

15 KEY LIGHT

The key/switch backlighting can be set to high, low or

OFF to suit ambient lighting.

Key/switch backlighting

set to high (default).

Key/switch backlighting

set to low.

17 LED BRIGHT (LED brightness)

The LED brightness control for front panel can be set

to high or low.

LED brightness set

to high.

LED brightness set

to low (default).

*16 LIGHT TIMER

The Light timer can be set to AUTO, ON or OFF to

suit lighting condition.

Auto: Automatically select “on” or “oFF” depends on

power supply voltage. (default)

on : Lights when some operation is performed, goes

out after 5 sec.

oFF : Lights continuously during transceiver power is

ON.

Default is Auto.

14 BACK LIGHT

The function display backlighting can be set to high,

low or OFF to suit ambient lighting.

Display backlighting set to

high (default).

Display backlighting set to

low.

(SSB/CW frequency shift setting)

(Display backlighting)

(Key/switch backlighting)

(Light timer setting)

(Automatic power OFF)

When “3 SIMPLE MODE” is set to ON, * marked items are undisplayed.

12 SET MODE

*23 PEAK HOLD

When the peak hold function is ON, the highest acti-

vated segment of the meter remains visible for 0.5

sec.; when OFF, the meter functions normally.

Peak hold ON

(default)

Peak hold OFF

*20 RF/SQL (RF gain/squelch control)

The [RF/SQL] control can be set as the squelch con-

trol (default), the RF/squelch control (USA version de-

fault) or automatic (acts as squelch in FM/AM modes;

as RF in SSB/CW/RTTY modes). (See p. 24)

The [RF/SQL] control

functions as squelch

control only.

The [RF/SQL] control

functions as RF gain

and squlch control for

all modes.

*21 SUB DIAL (Sub dial setting)

When this item is set to “rit,” pushing [RIT/SUB] turns

the RIT function ON (lights red)—rotating [M-CH]

changes the RIT frequency; when this item is set to

“FrEq,” pushing [RIT/SUB] turns the sub dial function

ON (lights green)—rotating [M-CH] changes the op-

erating frequency. Note that in FM and AM modes,

pushing [RIT/SUB] always selects the sub dial func-

tion (lights green), regardless of this setting.

Pushing [RIT/SUB]

selects the RIT function

(default).

Pushing [RIT/SUB]

selects the sub dial function.

22 OPT. FIL

When an optional filter is installed, this selection is

necessary, otherwise the filters cannot be selected.

Selections available are FL-52A, FL-53A, FL-222, FL-

257 and none (default). See p. 49 for usable ﬁlters for

each mode and see p. 87 for ﬁlter installation. Although the FL-96 is not listed on the option list, IC-703

would take FL-96 as well as other optional ﬁlter.

No filters are selected

(default).

FL-52A (for CW narrow filter)

is selected.

19 CURRENT IP

This item set the control of current intercept point for

power saving.

Auto: Automatically select “on” or “oFF” depends on

power supply voltage. (default)

on : Power saving mode continuously.

oFF : Priority to intercept point.

Default is Auto.

*24 QUICK SPLIT

When this item is set to ON, pushing [(F-1)SPL] for 1

sec. in the M1 display sets the undisplayed VFO fre-

quency to the displayed VFO frequency plus the split

offset, and activates split operation.

Quick split function ON

(default).

Quick split function OFF.

(Quick split function)

(Optional ﬁlter selection)

(Peak meter hold setting)

When “3 SIMPLE MODE” is set to ON, * marked items are undisplayed.

(Current intercept point)

SET MODE

26 SPL OFFSET

This item sets the offset (difference between transmit

and receive frequencies) for the quick split function.

Available offset frequencies are –9.999 to 9.999 MHz

in 0.001 MHz (1kHz) steps.

Default is 0.000 MHz.

*25 SPLIT LOCK

When this item is ON, the main dial can be used to

adjust the transmit frequency while pushing

[(F-3)XFC] even when the lock function is activated.

Split lock function OFF

(default)

Split lock function ON

*30 AM NB (Noise blanker in AM mode)

When this item is set to ON, the noise blanker func-

tion is available in AM mode. This is useful when

communicating in AM mode (the noise blanker func-

tion should not be used when listening to regular AM

broadcasts as it may degrade the received audio).

Noise blanker is available

on AM mode. (default)

Noise blanker is not

available on AM mode.

28 SCAN SPEED (Scanning speed)

This item sets the rate at which channels or frequen-

cies are scanned during scan operations. High or low

can be selected.

Scan speed is set to high

(default).

Scan speed is set to low.

29 U/D SPEED ([UP]/[DN] speed)

This item sets the rate at which frequencies are

scanned through when the [UP]/[DN] switches of the

microphone are pushed and held. High or low can be

selected.

Up/down speed is set to

high (default).

Up/down speed

is set to low.

27 SCAN RESUME

This item sets the scan resume function ON or OFF.

on : Scan resumes 10 sec. after stopping on a sig-

nal (or 2 sec. after a signal disappears);

oFF: Scan does not resume after stopping on a sig-

nal. For the priority watch, setting to OFF

pauses the watch until signal disappears and

scan resumes.

Scan resume function is

turned ON (default).

Scan resume function is

turned OFF.

31 PAD CH (Available memo pads)

This item sets the number of memo pad channels

available. 5 or 10 memo pads can be selected.

5 memo pads are available

(default).

10 memo pads are

available.

(Split lock function)

(Split offset frequency)

(Scan resume condition)

When “3 SIMPLE MODE” is set to ON, * marked items are undisplayed.

12 SET MODE

32 PWR ON CHK

This item selects the indication ON or OFF when turn-

ing power ON.

on : The Transceiver brieﬂy displays ‘All indication,’

‘RF power’ and ‘Power supply voltage’ when

turning power ON.

oFF: The display goes directly to frequency indication

at power ON.

Power on check ON

(default)

Power on check OFF

*35 TUNER SW

This item select BAND or ALL.

bAnd : [TUNER] switch ON/OFF condition is re-

mained for each band.

ALL : [TUNER] switch ON/OFF condition is com-

monly remained for all band.

The default is BAND.

*34 PTT TUNE

(PTT tune function)

This item set the PTT tuner start function ON or OFF.

This function activates internal tuner and optional AT-

180/AH-4

ANTENNA TUNER

, when connected.

on : The tuner is always tuned when the PTT is

pushed after the frequency is changed (more

than 1% from last-tuned frequency). (Internal

tuner or connected AT-180)

Tuning can be started automatically at the mo-

ment the PTT is pushed. (Connected AH-4)

oFF : PTT tuner start function OFF.

Tuning starts when pushing

[PTT] on a new frequency.

Tuning starts only when

[TUNER] is pushed

(default)

*33 A-TUNE STRT

The optional AT-180

ANTENNA TUNER

has an automatic

start capability which starts tuning if the SWR is

higher than 1.5–3.

oFF: The tuner remains OFF even when the SWR is

poor (1.5–3).

on : Automatic tune starts even when the tuner is

turned OFF.

NOTE: Even when “on” is selected, automatic tune

does not start for the 50 MHz band.

Auto tune function OFF

(default).

Auto tune function ON.

36 9600 MODE

(Packet data speed)

This item is used to change the communications

speed for packet operation. The data socket speed

can be set to 1200 or 9600 baud.

Default is 9600 baud.

(Auto tune start function)

When “3 SIMPLE MODE” is set to ON, * marked items are undisplayed.

(Power on check function)

(Tuner switch condition)

SET MODE

37 SPEECH LANG

When the optional UT-102

VOICE SYNTHESIZER UNIT

installed, you can select between English and Japan-

ese as the language.

Voice synthesizer functions

in English (default).

Voice synthesizer

functions in Japanese.

(Voice synthesizer language)

39 S-LVL SPCH

When an optional UT-102

SPEECH SYNTHESIZER UNIT

is installed, the synthesizer can be set to read out the

frequency/mode only, or both the frequency/mode

and S-meter level.

Voice synthesizer reads out

both the frequency/mode

and S-meter level (default).

Voice synthesizer reads

out the frequency/mode

only.

40 CI-V ADDRES

To distinguish equipment, each CI-V transceiver has

its own Icom standard address in hexadecimal code.

The IC-703’s address is 68H.

When 2 or more IC-703’s are connected to an op-

tional CT-17

V LEVEL CONVERTER

, rotate the main

dial to select a different address for each IC-703 in

the range 01H to 7FH.

Address set to 68H

(default).

Address set to 7FH.

*41 CI-V BAUD

This item sets the data transfer rate. When “Auto” is

selected, the baud rate is automatically set according

to the connected controller or remote controller.

Auto baud rate (default) 19200 bps

*43 CI-V 731

When connecting the IC-703 to the IC-735 for trans-

ceiver operation, you must change the operating fre-

quency data length to 4 bytes.

•This item

MUST

be set to “on” only when operating trans-

ceiver with the IC-735.

Frequency data set to

5 bytes (default).

Frequency data set to

4 bytes.

*42 CI-V TRN (CI-V transceive)

Transceiver operation is possible with the IC-703 con-

nected to other Icom HF transceivers or receivers.

When “on” is selected, changing the frequency, oper-

ating mode, etc. on the IC-703 automatically changes

those of connected transceivers (or receivers) and

vice versa.

Transceive ON

(default)

Transceive OFF

38 SPEECH SPD

When the optional UT-102

VOICE SYNTHESIZER UNIT

installed, you can select the speech speed of synthe-

sizer output between faster or slower.

Speech speed

is faster (default).

Speech speed

is slower.

(Voice synthesizer speed)

(S-meter level speech)

(CI-V address setting)

(CI-V data transffer rate)

(CI-V operating frequency data length)

When “3 SIMPLE MODE” is set to ON, * marked items are undisplayed.

MAINTENANCE

If the transceiver becomes dusty or dirty,

wipe it clean with a dry, soft cloth.

AVOID the use of strong chemical solvents

such as thinner, benzine or alcohol to clean

the transceiver. These may damage the

transceiver’s surfaces.

■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-703 has three of fuses (DC power cable fuses×

2, circuitry fuse×1) installed for transceiver protection.

• Fuses ............................................. F.G.B. 125 V 4 A

DC POWER CABLE FUSE REPLACEMENT

CIRCUITRY FUSE REPLACEMENT

The 13.8 V DC from the DC power cable is applied to

all units in the IC-703, except for the power ampliﬁer,

through the circuitry fuse. This fuse is installed in the

PA unit.

■Memory backup

All of the CPU’s memory is backed up by an EEP-

ROM (Electronically-Erasable Programmable Read-

Only Memory). All data you set, such as VFO,

memory, set mode contents, etc. is stored in this

EEPROM. There is no internal lithium battery.

■Cleaning

Fuse

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

POWER SUPPLY

RECEIVE

POSSIBLE CAUSE SOLUTION REF.

Power does not come

on when the [POWER]

switch is pushed.

No sound comes from

the speaker.

Sensitivity is low.

Receive audio is distor-

ted.

Receive signal is distor-

ted with strong signals.

DC power cable is improperly

connected.

Fuse is blown.

Battery is exhausted if you are using

a 12 V battery as the power source.

Reconnect the power cable correctly.

Check for the cause, then replace the

fuse with a spare one.

(Fuses are installed in two places. One is

installed in the DC power cable and the

other is installed in the PA unit.

Check the battery voltage with the

[POWER] pushed IN.

p. 15

p. 83

—

pgs. 1,

17, 23

pgs. 1,

17, 24

—

p. 14

—

pgs.

64– 66

p. 46

p. 23

p. 47

p. 48

p. 46

Volume level is set too low.

The squelch is closed.

The transceiver is in the transmitting

condition.

An external speaker or headphones

are connected.

The antenna is not connected properly.

The antenna feed line is cut or shorted.

The antenna is not properly tuned.

The attenuator function is activated.

The operating mode is not selected

correctly.

The [SHIFT] control is set off-center.

Noise blanker function is activated.

Preamp is activated.

Rotate [AF] clockwise to obtain a suit-

able listening level.

Rotate [SQL] counterclockwise to

open the squelch.

Release [PTT] on the microphone or

check the SEND line of an external

unit, if connected.

Check the external speaker or head-

phone plug connection.

Reconnect to the antenna connector.

Check the feed line and correct any

improper conditions.

Push [TUNE] to manually tune the

antenna.

Push [ATT] to turn the function OFF.

Select a suitable operating mode.

Set [SHIFT] to the center position.

Push

[(F-2)NB]

in the M3 display to

turn the function OFF.

Push [P.AMP] to turn the function

OFF.

14 TROUBLESHOOTING

PROBLEM

TRANSMITDISPLAYSCAN

POSSIBLE CAUSE SOLUTION REF.

Transmitting is impossi-

ble.

Output power is too low.

No contact possible with

other stations.

Repeater cannot be ac-

cessed.

Transmitted signals are

distorted.

Displayed frequency

does not change proper-

ly.

Programmed scan does

not stop.

Programmed scan does

not start.

Memory scan does not

start.

Memory select scan

does not start.

The operating frequency is not set to

a ham band.

Power is set to a lower power than

maximum.

Microphone gain is set too low.

The antenna is not connected properly.

The antenna feed line is cut or shorted.

The antenna is not properly tuned.

The transceiver turning ON the battery

operating mode.

RIT function is activated.

Split function is activated.

Split function is not activated.

An incorrect transmit frequency is set.

Subaudible tone encoder is OFF and

repeater requires a tone for access.

Programmed subaudible tone fre-

quency is wrong.

Microphone gain is set too high.

The compression level is set too high

with the speech compressor ON.

The dial lock function is activated.

The internal CPU has malfunctioned.

Squelch is open.

The same frequencies have been

programmed in scan edge memory

channels.

2 or more memory channels have not

been programmed.

2 or more memory channels have not

been designated as select channels.

Set squelch to the threshold position.

Programm different frequencies into

scan edge memory channels.

Program 2 or more memory chan-

nels.

Designate 2 or more memory chan-

nels as select channels for the scan.

Set gain in quick set mode.

Set compression level to a suitable

position.

Push [LOCK] to deactivate the func-

tion.

Reset the CPU.

(While pushing [UP] and [DN] push [POW-

ER] to turn power ON.

Push [(F-1)SPL] in the M1 display to

turn the function ON

Set the proper frequencies into VFO

A and B or into one of the memory

channels.

Use

[(F-2)TON] in the M4

display to se-

lect FM-T.

Program the required frequency using

FM tone set mode.

Push [RIT] to turn the function OFF.

Push [(F-1)SPL] in the M1 display to turn

the function OFF.

Set the output power in quick set

mode/initial set mode.

Set microphone gain to a suitable

position using quick set mode.

Reconnect the antenna connector.

Check the feed line and correct any

improper conditions.

Push [TUNE] to manually tune the

antenna.

Check the battery voltage with the

[POWER] pushed IN.

Set the frequency to a ham band. p. 19

pgs. 25,

p. 26

—

pgs.

64–66

pgs. 1,

p. 47

p. 51

p. 19

p. 45

p. 44

p. 26

p. 54

p. 25

p. 17

p. 24

p. 62

p. 63

OPTION UNIT INSTALLATIONS AND SETTINGS

■

Opening the transceiver case

To remove the transceiver case unscrew the 18 screws

(5 in the top panel, 5 in the bottom panel, 8 in the side

panels: 4 pieces each) as shown in the diagram below.

■UT-102

VOICE SYNTHESIZER UNIT

The UT-102 announces the accessed band’s fre-

quency, mode, etc. (S-meter level can also be an-

nounced—p. 82) in a clear, electronically generated

voice, in English (or Japanese).

qRemove the top cover as shown above.

wConnect the UT-102 as shown in the diagram at

right (label side up).

eReplace the top cover.

DOperation

qSelect the desired announcing condition, such as

speed, language, contents, in initial set mode.

(p. 82)

wPush [LOCK] for 1 sec. (until “zero” is announced)

to announces the selected contents.

✔Adjusting the announcing audio level

➥Adjust the R7205 on the MAIN unit .

UT-102

MAIN unit

R7205

[LOCK]

Caution: Disconnect the DC power cable from

the transceiver before performing any work on the

transceiver.

Top cover

Speaker

cable

Bottom cover

15 OPTION UNIT INSTALLATIONS AND SETTINGS

■IF ﬁlter

Several IF ﬁlters are available for the IC-703. Choose

a ﬁlter most appropriate to your operating needs.

NOTE: After ﬁlter installation, specify the installed

ﬁlter using initial set mode (item 22, p.79). Other-

wise, the installed ﬁlter will not function properly.

FL-52A

RTTY NARROW FILTER

500 Hz/–6 dB

FL-53A

CW NARROW FILTER

250 Hz/–6 dB

FL-222

SSB NARROW FILTER

1.8 kHz/–6 dB

FL-257

SSB WIDE FILTER

3.3 kHz/–6 dB

qRemove the top cover as shown on the previous

page.

wDisconnect the coaxial cable connectors, P2 and

P4, then unscrew 10 screws on the MAIN unit.

•Attach the grounding spring at the same place when re-

turning.

eSlide the MAIN unit in the direction of the arrow q,

then open the MAIN unit in the direction of the

arrow w.

• Be careful for the ﬂat cables.

rInstall the desired filter as shown in the diagram

below.

tTighten the nuts then solder the ﬁlter’s pins.

yReturn the MAIN unit to the original position.

•Make sure to attach the grounding spring to the original

position.

uConnect P2 and P4 to J2 and J1, respectively.

iReplace the top cover.

Soldering points

Nuts

Flat washers

Optional

IF filter

Red belt

Flat cable

Grounding

spring

Front side

Rear side P2 (J2)

P4 (J1)

OPTION UNIT INSTALLATIONS AND SETTINGS

■UT-106

DSP RECEIVER UNIT

qOpen the transceiver top cover as shown on p. 86.

wRemove the 4-pin connector (P2451) from main

CPU shielding case on the MAIN unit (top side)

and plug it into J1 of the UT-106.

ePlug the 4-pin connector (P1) from the UT-106 into

J2451 on the MAIN unit.

rPlug the supplied ﬂat cable into J3 on the UT-106

and J2453 on the MAIN unit.

• Be careful of the orientation of the ﬂat cable.

tAttach the UT-106 to the main CPU shielding case,

using the existing guide for alignment, as illustrated

at right above

yReassemble the transceiver.

(UT-106)

J2451

J2453

Flat cable

P2451

UT-106

Front side

J2451

Front side

MAIN unit

(top side)

Main CPU

shielding case

P2451

■MB-72

CARRYING HANDLE

The optional MB-72

CARRYING HANDLE

is convenient

when carrying the transceiver for DX’peditions, field

operation, etc.

qTighten the supplied screws plus rubber feet as

shown below.

wAttach the MB-72 to the left side of the transceiver

as shown below.

Carrying handle

Rubber

feet

15 OPTION UNIT INSTALLATIONS AND SETTINGS

■AT-180 internal switch description

The optional AT-180 has 3 operating conditions for HF

band operation. Select a suitable condition according

to your antenna system.

qRemove the top cover of the AT-180.

wSet the tuner switches to the desired positions ac-

cording to the table below.

•Speciﬁcations for the AT-180

• Frequency coverage : 1.9–54 MHz

• Input impedance : 50 Ω

•Maximum input : 120 W

power

•Minimum tuning : 8 W

power

•Matching impedance : 16.7–150 Ω(HF band)

range 20–125 Ω(50 MHz band)

• Tuning accuracy : Less than SWR 1.5:1

• Insertion loss : Less than 1.0 dB

(after tuning)

•Power supply : 13.8 V DC/1 A (supplied from

requirements the transceiver’s ACC socket)

• Dimensions (mm/in) : 167(W)×58.6(H) ×225(D)

69⁄16(W) ×25⁄17(H) ×87⁄8(D)

• Weight : 2.4 kg; 5 lb 4 oz

• Supplied accessories : coaxial cable (1 m),

ACC cable (DIN 13 pins)

•AT-180 inside top cover

•Connector information for ACC(2) socket

S2 S1

DC BA

ACC 2

PIN NO./

NAME DESCRIPTION

q8 V Regulated 8 V output.

(10 mA max.)

wGND Connects to ground.

eSEND

Input/output pin.

Goes to ground when transmitting (20 mA

max). When grounded, transmits.

rBAND Band voltage output.

(Varies with amateur band; 0 to 8.0 V).

tALC ALC output voltage (–4 to 0 V).

yNC No connection.

u13.8V

13.8 V output when power is ON (1 A max).

SW Position

Operation

(default)

The tuner operating condition is set by S2

described below.

THROUGH INHIBIT

The tuner tunes the antenna even when the

antenna has poor SWR (up to VSWR 3:1

after tuning). In this case, manual tuning is

necessary each time you change the fre-

quency although the tuner automatically

starts tuning when the VSWR is higher than

3:1. This setting is called “through inhibit,”

however, the tuner is set to “through” if the

VSWR is higher than 3:1 after tuning.

TUNER SENSITIVE CONDITION

The tuner tunes each time you transmit (ex-

cept SSB mode). Therefore, the lowest

SWR is obtained at any given time.

For SSB mode, the same condition as the

“D” position.

(default)

NORMAL CONDITION

The tuner tunes when the SWR is higher

than 1.5:1. Therefore, the tuner activates

only when tuning is necessary.

SPECIFICATIONS

■General

• Frequency coverage : Receive

30 kHz–60.00000 MHz*

Transmit

1.800– 1.99999 MHz*

3.500– 3.9999 MHz*

7.000– 7.300 MHz*

10.100– 10.150 MHz

14.000– 14.350 MHz

18.068– 18.168 MHz

21.000– 21.450 MHz

24.890– 24.990 MHz

28.000– 29.700 MHz

50.000– 54.000 MHz*

*Depending on version.

• Mode : SSB, CW, AM, FM, RTTY

•Number of memory : 105 (split memory: 99; scan edges: 6)

channels

• Antenna connector : SO-239 /50 Ω

•Usable temperature : –10°C to +60°C (+14°F to +140°F)

range

• Frequency stability : Less than ± 0.5 ppm

(0°C to +50°C; +32°F to +122°F).

•Power supply : 9–15.87 V DC (negative ground)

requirement

• Current drain :

Transmit 2.0 A typ. (TX 5 W at 9.6 V DC)

3.0 A typ. (TX 10 W at 13.8 V DC)

Receive squelched 300 mA typ. (at 9.6 V DC)

max. audio 450 mA typ. (at 9.6 V DC)

1.2 A (at 13.8V DC)

•Dimensions : 167(W) ×58(H) ×200(D) mm,

(projections not included) 69⁄16(W) ×25⁄16(H) ×77⁄8(D) in

• Weight : 2.0 kg (4 lb 4 oz)

• CI-V connector : 2-conductor 3.5 (d) mm (1⁄8˝)

• ACC connector : 13-pin

■Transmitter

• Output power :

SSB, CW, FM, RTTY 0.1–5 W (at 9.6 V DC)

0.1–10 W (at 13.8 V DC)

AM 0.1–2 W (at 9.6 V DC)

0.1–4 W (at 13.8 V DC)

• Modulation system :

SSB Balanced modulation

AM Low level modulation

FM Variable reactance modulation

•Spurious emissions : Less than – 60 dB*

*spurious freq.: below 30 MHz: –50 dB; above 50 MHz: –60 dB

• Carrier suppression : More than 40 dB

• Unwanted sideband : More than 50 dB

•Microphone : 8-pin modular jack (600 Ω)

connector

•KEY connector : 3-conductor 6.35 (d) mm (1⁄4")

■Receiver

• Receive system :

Double-conversion superheterodyne

• Intermediate frequencies:

1st 64.455 MHz

2nd 455 kHz

• Sensitivity at pre-amp ON (typical):

• Squelch sensitivity (threshold; preamp ON) :

SSB/CW/RTTY/AM Less than 5.6 µV

FM Less than 0.32 µV

• Selectivity* (typical) :

SSB/CW More than 2.4 kHz/–6 dB

Less than 4.0 kHz/–60 dB

AM/FM-N More than 9.0 kHz/–6 dB

Less than 20.0 kHz/–50 dB

FM More than 15.0 kHz/–6 dB

Less than 30.0 kHz/–50 dB

*Without optional ﬁlter and with mid

band selected.

•Spurious and image rejection ratio:

HF bands More than 70 dB

50 MHz band More than 65 dB (except IF through)

• Audio output power : More than 0.5 W at 10% distortion

with an 8 Ωload (at 9.6 V DC)

More than 1.0 W at 10% distortion

with an 8 Ωload (at 13.8 V DC)

• RIT variable range : ±9.99 kHz max.

• PHONES connector : 3-conductor 3.5 (d) mm (1⁄8˝)/8 Ω

• EXT SP connector : 2-conductor 3.5 (d) mm (1⁄8˝)/8 Ω

■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)

• Tuning accuracy : VSWR 1.5:1 or less

• Insertion loss : Less than 1.0 dB (after tuning)

Frequency

range

SSB/CW/RTTY

10 dB S/N

12 dB SINAD

0.5–1.8 MHz —13 µV —

1.8–28 MHz 0.16 µV 2.0 µV —

28–29.7 MHz 0.5 µV

50–54 MHz 0.13 µV 1.0 µV 0.25 µV

MB-63 MOUNTING BRACKET

Metal plate for attaching the front panel to a

wall or other such ﬂat surface.

OPTIONS

AT-180 HF/50 MHz AUTOMATIC

ANTENNA TUNER

Fully automatic antenna tuner with preset

memories for each 100 kHz. Unique “auto-

matic tuner on” function is available. See

p. 89 for AT-180 speciﬁcations.

HM-103 HAND MICROPHONE

Standard hand microphone.

AH-4 HF AUTOMATIC ANTENNA

TUNER

Specially designed to tune a long wire an-

tenna for portable or mobile HF/50 MHz op-

eration. The “PTT tune” function provides

simple operation.

• Input power rating: 150 W

AH-2b ANTENNA ELEMENT

A 2.5 m long antenna ele-

ment for mobile operation

with the AH-4.

•Frequency coverage

7–54 MHz band with the

AH-4

Optional ﬁlters

FL-52A CW/RTTY NARROW FILTER

(500 Hz/–6 dB)

FL-53A CW NARROW FILTER

(250 Hz/–6 dB)

FL-222 SSB NARROW FILTER

(1.8 kHz/–6 dB)

FL-257 SSB WIDE FILTER

(3.3 kHz/–6 dB)

SM-20 DESKTOP MICROPHONE

Includes [UP]/[DOWN] switches and a low

cut function. The OPC-589 is necessary to

use this microphone.

SP-7 EXTERNAL SPEAKER

Compact speaker for base station opera-

tion. Height can be adjusted for your conve-

nience.

• Input impedance: 8 Ω

• Max. input power: 5 W

CT-17 CI-V LEVEL CONVERTER

UNIT

For remote transceiver control using a per-

sonal computer equipped with an RS-232C

port. You can change frequencies, operat-

ing mode, memory channels, etc., via your

computer.

SP-10 EXTERNAL SPEAKER

External speakers suitable for mobile oper-

ation.

SP-12: Slim-type; 8 Ω/3 W

SP-10: Compact-type; 4 Ω/5 W

MB-62

MOBILE MOUNTING BRACKET

Mounts the transceiver main body, with or

without the front panel, inside a vehicle.

UT-102 VOICE SYNTHESIZER UNIT

Announces the receive frequency, mode

and S-meter level in a clear, electronically-

generated voice in English (or Japanese).

OPTIONS

BP-228 Ni-Cd BATTERY PACK (9.6 V, 2800 mAh)

Provides outdoor operation (max. output power 5 W).

OPC-1248 DC POWER ADAPTOR CABLE

Provides to connect PS-125. Connects 3-pin DC cable (OPC-1229) to 6-pin connector.

MB-65 MOUNTING BASE

Allows you to conveniently vehicle-mount

the front panel of the IC-703. An MB-63

must be used in combination with the MB-

65.

OPC-598 ACC 13-PIN CABLE

Required when using the AT-180.

MB-72 CARRYING HANDLE

Convenient when carrying the transceiver.

OPC-581/587

SEPARATION CABLE

Provide front panel detached operation for

mobile installations or compact transceiver

operation.

• OPC-581: 3.5 m (11.5 ft)

• OPC-587: 5 m (16.4 ft)

OPC-589

MICROPHONE ADAPTOR CABLE

Conversion between 8-pin modular and 8-

pin metal connector for using a desktop mi-

crophone with the IC-703.

OPC-599 ADAPTOR CABLE

13-pin, ACC connector to 7-pin + 8-pin ACC

connector.

PS-125 DC POWER SUPPLY

Light weight switching regulator power sup-

ply. The OPC-1248 is necessary to use this

power supply.

• Output voltage: 13.8 V

• Max. current drain: 25 A

UT-106 DSP RECEIVER

Provides AF DSP functions such as noise

reduction and auto notch.

Built-in to some versions.

LC-156

MULTI-BAG (with controller case)

MENU GUIDE

CI-V ADDRES

CURRENT IP

Initial set mode

No. Indication Description

1 MAX POWSET

2 PoSAVE MODE

3 SIMPLE MODE

4 MODE SELECT

5 MODE POWSET

6 BEEP

7 BAND BEEP

8 BEEP LEVEL

9 BEEP LIMIT

10 CW NOR SIDE

11 SID-T LEVEL

12 SID-T LIMIT

Max. output power setting

Power save setting

Simple mode setting

Mode availability

Power setting for mode

Confirmation beeps

Band edge beeps

Beep level adjustment

PTT tune function

Tuner switch condition

Packet data speed

CW side tone level

Split offset frequency

Noise blanker in AM mode

No. Indication Description

13 SYNC TUNING

Available memo pads

14 BACK LIGHT

15 KEY LIGHT

16 LIGHT TIMER

LED BRIGHT17

AUTO OFF

SUB DIAL

OPT. FIL

RF/SQL

Scanning speed

23 PEAK HOLD

24 QUICK SPLIT

25 SPLIT LOCK

26 SPL OFFSET

27 SCAN RESUME

28 SCAN SPEED

29 U/D SPEED

30 AM NB

A-TUNE STRT

PTT TUNE

TUNER SW

36 9600 MODE

37 SPEECH LANG

38 SPEECH SPD

39 S-LVL SPCH

43 CI-V 731

CI-V TRN

CI-V BAUD

CW side tone level limit

Frequency shift setting

Display backlighting

Key/switch backlighting

Light timer setting

LED brightness

Automatic power OFF

Current intercept point

Sub dial setting

Optional filter selection

RF gain/squelch control

Split lock function

Peak meter hold setting

Quick split function

Beep audio level limit

CW carrier point setting

[UP]/[DN] speed

Scan resume condition

PAD CH

PWR ON CHK Power ON check function

Auto tune start function

Voice synthesizer lang.

Voice synthesizer speed

S-meter level speech

CI-V address setting

CI-V data length

CI-V transceive

Data transfer rate

+ power ON Power OFF then ON to exit initial set mode.

LOCK

*When “3 SIMPLE MODE” is set to ON, box items are undisplayed.

MENU GUIDE

M1 SPL A/B XFC

M2 MW MCL V/M

M3 FIL NB MET

M4 VOX COM AGC

VOXM4 COM

TON

1/4

M4 AGC

KEYM4 AGC

S1 MW MPW MPR

S2 SCN PRI

SEL

V/M

Quick set mode

For 1 sec.

(SSB/AM)

(in memory

mode)

(CW)

(RTTY)

(FM)

S3 7 14 21

S4 ANF NR NRL

G1 BAND scope

G2 SWR Graph

G3 TX freq.

G4 Memory name

1/4M4 AGC (SSB-D)

DISPLAY

DISPLAYDISPLAY

M-CH

No.

Q1 RF POWER RF POWER RF POWER

Q2 MIC GAIN KEY SPEED RTTY REV

Q3 CARRIER

Frq*1CW REV

SSB/AM/FM

mode

RTTY

mode

RF POWER

CAR SIDE

SSB-D

mode

*1SSB mode only

MODE

DISPLAY

ABOUT CE

INSTALLATION NOTES

For amateur base station installations it is recom-

mended that the forwards clearance in front of the an-

tenna array is calculated relative to the EIRP (Effective

Isotropic Radiated Power). The clearance height below

the antenna array can be determined in most cases

from the RF power at the antenna input terminals.

As different exposure limits have been recommended

for different frequencies, a relative table shows a

guideline for installation considerations.

Below 30 MHz, the recommended limits are speciﬁed

in terms of V/m or A/m ﬁelds as they are likely to fall

within the near-ﬁeld region. Similarly, the antenna may

be physically short in terms of electrical length and that

the installation will require some antenna matching de-

vice which can create local, high intensity magnetic

ﬁelds. Analysis of such MF installations is best consid-

ered in association with published guidance notes

such as the FCC OET Bulletin 65 Edition 97-01 and its

annexes relative to amateur transmitter installations.

The EC recommended limits are almost identical to the

FCC speciﬁed ‘uncontrolled’ limits and tables exist that

show pre-calculated safe distances for different an-

tenna types for different frequency bands. Further in-

formation can be found at http://www.arrl.org/.

• Typical amateur radio installation

Exposure distance assumes that the predominant ra-

diation pattern is forwards and that radiation vertically

downwards is at unity gain (sidelobe suppression is

equal to main lobe gain). This is true of almost every

gain antenna today. Exposed persons are assumed to

be beneath the antenna array and have a typical

height to 1.8 m.

The ﬁgures assume the worst case emission of con-

stant carrier.

For the bands 10 MHz and higher the following power

density limits have been recommended:

10–50 MHz 2 W/sq m

EIRP clearance heights by frequency band

1 Watts 2.1 m

10 Watts 2.8 m

25 Watts 3.4 m

100 Watts 5 m

1000 Watts 12 m

Forward clearance, EIRP by frequency band

100 Watts 2 m

1000 Watts 6.5 m

10,000 Watts 20 m

100,000 Watts 65 m

In all cases any possible risk depends on the transmit-

ter being activated for long periods. (actual recom-

mendation limits are speciﬁed as an average during 6

minutes) Normally the transmitter is not active for long

periods of time. Some radio licenses will require that a

timer circuit automatically cuts the transmitter after 1–2

minutes etc.

Similarly some types of transmitter, SSB, CW, AM etc.

have a lower ‘average’ output power and the assessed

risk is even lower.

Versions of the IC-703 which display the

“CE” symbol on the serial number seal,

comply with the essential requirements of

the European Radio and Telecommunication

Terminal Directive 1999/5/EC.

This warning symbol indicates that this

equipment operates in non-harmonised fre-

quency bands and/or may be subject to li-

censing conditions in the country of use. Be

sure to check that you have the correct ver-

sion of this radio or the correct programming

of this radio, to comply with national licens-

ing requirement.

ABOUT CE

DECLARATION

OF CONFORMITY

We Icom Inc. Japan

1-1-32, Kamiminami, Hirano-ku

Osaka 547-0003, Japan

Kind of equipment: HF/

50 MHz ALL MODE TRANSCEIVER

This compliance is based on conformity according to Annex III of the

directive 1999/5/EC using the following harmonised standards:

i) Article 3.1a EN 60950 + A11

ii) Article 3.1b EN 301489-1 and EN 301489-15 (or ETS 300 684)

iii) Article 3.2 EN 301 783-2

iv)

Type-designation: i703

Declare on our sole responsibility that this equipment complies with the

essential requirements of the Radio and Telecommunications Terminal

Equipment Directive, 1999/5/EC, and that any applicable Essential Test

Suite measurements have been performed.

Version (where applicable):

Signature

T. Maebayashi

General Manager

Authorized representative name

Icom (Europe) GmbH

Himmelgeister straße 100

D-40225 Düsseldorf

Place and date of issue

Düsseldorf 14th Mar. 2003

•Version and frequency coverage

Europe (#02, #12)

Receive

0.500–29.999 MHz

50.000–54.000 MHz

Transmit

1.800– 1.999 MHz

3.500– 3.800 MHz

7.000– 7.100 MHz

10.100–10.150 MHz

14.000–14.350 MHz

18.068–18.168 MHz

21.000–21.450 MHz

24.890–24.990 MHz

28.000–29.700 MHz

50.000–52.000 MHz

Italy (#10, #20)

Receive

1.830– 1.850 MHz

3.500– 3.800 MHz

7.000– 7.100 MHz

10.100–10.150 MHz

14.000–14.350 MHz

18.068–18.168 MHz

21.000–21.450 MHz

24.890–24.990 MHz

28.000–29.700 MHz

Transmit

1.830– 1.850 MHz

3.500– 3.800 MHz

7.000– 7.100 MHz

10.100–10.150 MHz

14.000–14.350 MHz

18.068–18.168 MHz

21.000–21.450 MHz

24.890–24.990 MHz

28.000–29.700 MHz

1-1-32 Kamiminami, Hirano-ku, Osaka 547-0003 Japan

A-6241H-1EX-q

Printed in Japan

■GER ■

■FRA ■ESP ■SWE

■AUT ■NED ■POR ■DEN

■GBR ■BEL ■ITA ■FIN

■IRL ■LUX ■GRE ■SUI

■NOR

IC-703

#02, #12

(Europe)

HF+50 M

■GER ■FRA ■ESP ■SWE

■AUT ■NED ■POR ■DEN

■GBR ■BEL ■ITA ■FIN

■IRL ■LUX ■GRE ■SUI

■NOR

IC-703

#10, #20

(Italy)

HF only

ICOM orporated IC-703 HF / VHF Amateur Transceiver User Manual IC 703 INSTRUCTION MANUAL ENGLI

ICOM Incorporated HF / VHF Amateur Transceiver IC 703 INSTRUCTION MANUAL ENGLI

Users Manual

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