Transmit filter width setting, Speech compressor, Ssb only) – Icom IC-7700 User Manual
Page 113
6-5
■
Transmit filter width setting
(SSB only)
The transmit filter width for SSB mode can be selected
from wide, middle and narrow.
➥
During USB or LSB mode selection, push and hold
[COMP]
(MF6)
for 1 sec. several times to select the
desired transmit filter width from wide, middle and
narrow.
• The filter can be independently set on the speech com-
pressor function is ON and OFF.
• The following filters are specified as the default. Each of
the filter width can be re-set in level set mode.
(p. 12-6)
WIDE
: 100 Hz to 2.9 kHz
MID
: 300 Hz to 2.7 kHz
NAR
: 500 Hz to 2.5 kHz
■
Speech compressor
(SSB only)
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]
(MF2)
several times to select the ALC
meter for microphone gain adjustment.
w
Push [COMP]
(MF6)
to turn the speech compressor
ON.
e
Push [METER]
(MF2)
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) for your normal
voice level.
When the COMP meter peaks exceed the COMP
zone, your transmitted voice may be distorted.
t
Push [METER]
(MF2)
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 and hold [METER]
(MF2)
for 1 sec. to display the
multi-function meter that can check the ALC and
COMP level at a glance.
S
1
0
0
0
1
2
5
10
10
10
20
44
52V
50
100 150
200
250
15
3
1.5
I
D
V
D
dB
W
A
Po
SWR
COMP
ALC
5
9
+
20
+
40
+
60dB
∞
COMP zone
[MIC]
[DRIVE] [COMP] control
COMP
METER
COMP
6
FUNCTIONS FOR TRANSMIT