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

VI
QUICK REFERENCE GUIDE
D D
What 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]...

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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....

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...

IX
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).
w
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...

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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....

1
1
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....

2
1PANEL 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....

3
1PANEL DESCRIPTION
!6RIT/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...

4
1PANEL 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...

5
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...