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

16
2INSTALLATION AND  CONNECTIONS
External antenna tuners and linear amplifier
Ground GroundLong wire or optional AH-2b
AH-4
ANTIC-703
Coaxial cable
(from the AH-4)
CONNECTING THE AH-4
IC-703
GroundGround
AT-180
CONNECTING THE AT-180
HF
to 6 m
antenna
[TRANSCEIVER][ANT]
[ANT][ACC] [ACC]ACC cable supplied with the AT-180Coaxial cable supplied
with the AT-180one 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...

3
17
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 CLEARSall 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...

18
3BASIC 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...

19
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 “
Z” 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...

20
3BASIC OPERATION
•1 Hz and 10 Hz tuning steps
When neither the quick tuning step or programmable
tuning step “
Z” 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...

21
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...

22
3BASIC 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
register.
• The default settings for [F-1], [F-2],...

Volume setting
23
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...

24
3BASIC 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...

Basic transmit operation
DTransmitting
25
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...