Icom IC-756PROIII - Board Layouts Continuation; Display Board - Bottom View

68
6
FUNCTION FOR TRANSMIT
6
■ Transmit filter width setting (SSB only)
The transmit filter width for SSB mode can be se-
lected from wide, middle and narrow.
➥ During USB or LSB mode selection, push [COMP]
for 1 sec. several times to select the desired trans-
mit filter width from wide, middle and narrow.
•The filter functions regardless of the speech compres-
sor use.
•The following filters are specified as the default. Each
of the filter width can be re-set in level set mode.
(pgs. 95, 96)
WIDE : 100 Hz to 2.9 kHz
MID : 300 Hz to 2.7 kHz
NAR : 500 Hz to 2.5 kHz
[COMP]
■ Speech compressor
The speech compressor increases average RF out-
put power, improving signal strength and readability
in SSB mode.
•Speech compressor
q Select USB or LSB mode.
w Push [COMP] momentarily to turn the speech
compressor ON and OFF.
e Push [COMP] for 1 sec. to select between narrow,
middle or wide transmit filter.
•Transmit filter width: (see above for details)
NAR 2.0 kHz
MID 2.4 kHz
WIDE 2.8 kHz
•Compression level setting
q Select USB or LSB mode.
w Preset the transceiver as follows:
‘COMP’ function : OFF
‘METER’ function : ALC
[MIC GAIN] control : Center position
[COMP] control : Center position
[RF POWER] control : Max. counterclockwise
e Transmit at your normal voice level.
r Adjust the [MIC GAIN] control so that the ALC
meter reads within the ALC zone, whether or not
you speak softly or loudly.
t Push [COMP] momentarily to turn the speech
compressor ON.
y Push [METER] once to select the COMP meter.
u Adjust the [COMP] control so that the COMP
meter reads within 10 dB and 20 dB.
When the ALC meter peaks above the ALC zone,
your transmitted voice may be distorted.
[COMP] (switch)[METER]
[RF POWER] [COMP] (control)
[MIC GAIN]
SWR
S
COMP
ALC
Po
0
10
10
25 50
100
20
1
0
1. 5
2
3
1
5
9
+20
+40
+60dB
dB
COMP meter