Icom Ic-703 Hf/50mhz All Mode Tranciever Instruction Manual

HF/50 MHz 
ALL MODE TRANSCEIVER
i703
INSTRUCTION MANUAL 

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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 UNITrequired
some version)
❍All mode capability covering 160–6 m 
❍9.0–15.87 V operation 
❍Compact with detachable...

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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) mmplug ...................................................1
y6.5 (d) mmElectronic keyer plug .........................1
uMicrophone...

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3 BASIC OPERATION ……………………17–26
When first applying power (CPU resetting)…… 17
DM1display 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 ……………………………………...

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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
D
Frequency indication during AFSK operation …68
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...

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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...

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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...

Microphones: Connect the microphone to the modu-
lar-type connector bottom of the front panel or back
of the radio.
Rear panelFront panelMICROPHONES 
HM-103 SM-20 OPC-589
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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...

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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: 8Ω/Max. input
power: 5 W)
Front panel
Rear panel
SPEAKER
or
PHONES   ∫
SPEAKER √
Select ‘SPEAKER’ with 
the [PHONES/SPEAKER] 
switch on the back of the 
front panel.
SPEAKER
Front...

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QUICK REFERENCE GUIDE
D D
Just 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...