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
S
0
I
10
D
0
P
O 1.5
1
0
SWR
COMP
(SSB only)
9
+
20
+
40
+
60dB
5
10
50 100 150
15
200 A
250
∞
2
3
W
20
10
dB
ALC 44
52V V
D
FUNCTIONS FOR TRANSMIT
(SSB only)
The transmit filter width for SSB mode can be selected
from wide, middle and narrow.
➥ During USB or LSB mode selection, hold down
[COMP] for 1 second several times to select the de-
sired transmit filter width from wide, middle and nar-
row.
• 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 out-
put 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
Hold down [METER] for 1 second to display the multi-
function meter that can check the ALC and COMP
level at a glance.
6-5
6