Transmit Filter Width Setting (Ssb Only); Speech Compressor (Ssb Only) - Icom IC-7800 Instruction Manual

■ Transmit filter width setting
[COMP]
■ Speech compressor
[MIC] [METER] [COMP]
[COMP] control [DRIVE]
COMP zone
5
1
5
S
0
50
I
10
D
0
2
P
O 1.5
10
1
0
SWR
COMP
ALC
(SSB only)
(SSB only)
9 +
20
+
40
+
60dB
10
100 150
15
200
A
∞ 250
3
W
20
dB
44
52V V D
FUNCTIONS FOR TRANSMIT
The transmit filter width for SSB mode can be selected
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 compressor
use.
• The following filters are specified as the default. Each of
the filter width can be re-set in level set mode. (p. 12-5)
WIDE : 100 Hz to 2.9 kHz
MID : 300 Hz to 2.7 kHz
NAR : 500 Hz to 2.5 kHz
The speech compressor increases average RF output
power, improving signal strength and readability in
SSB mode only.
q Select USB or LSB mode and adjust [MIC] to a suit-
able level.
• Push [METER] several times to select the ALC meter for
microphone gain adjustment.
w Push [COMP] to turn the speech compressor ON.
e Push [METER] once to select the COMP meter.
r While speaking into the microphone, rotate [COMP]
control, so that the COMP meter reads within the
COMP zone (10 to 20 dB range) with your normal
voice level.
When the COMP meter peaks exceed the COMP
zone, your transmitted voice may be distorted.
t Push [METER] 5 times to select the ALC meter.
y While speaking into the microphone, rotate [DRIVE],
so that the ALC meter reads within the 30 to 50%
range of the ALC zone with your normal voice level.
✔ For your convenience
Push [METER] for 1 sec. to display the multi-function
meter that can check the ALC and COMP level at a
glance.
6-5
6