Icom IC-703 - Main Unit Voltage Diagram

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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.
q Select USB or LSB mode.
w Select 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.
e Adjust 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.
r Select 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.”
t Push [MENU] one or more times to select M4.
y Push [
(F-2)
COM] to turn the speech compressor
function ON.
• “COM” appears.
u Push [(F-2)COM] for 1 sec. to enter the compres-
sion level set mode (below).
i Rotate 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]
R
LSB
CH
VFO A
P O
S1
5
5379
20 40
10
60dB
USB CW R TT Y 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.
D Compression 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
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