Speech Compressor - Icom IC-718 Instruction Manual

Speech compressor

<MODE> SSB
The speech compressor increases average RF output
power, improving signal strength and readability.
q Push [SSB] to select USB or LSB mode.
w Push and hold [COMP] (MF7) for 1 sec. to select
COMP TBW set screen.
e 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] to turn the speech compressor ON.
r While speaking into the microphone, rotate the
main dial , so that the COMP meter reads within
the COMP zone (10 to 20 dB range) for your nor-
mal voice level.
When the COMP meter peaks exceed 20 dB,
your transmitted voice may be distorted.
t Push [COMP] (MF7) or [EXIT/SET] to exit COMP
TBW set mode.
y Adjust the ALC meter reading within the 30 to 50%
range of the ALC scale. (p. ??)
Transmit filter width setting
<MODE> SSB
The transmit filter width for SSB mode can be
selected from wide, middle and narrow.
q Push [SSB] to select USB or LSB mode.
w Push and hold [COMP] (MF7) for 1 sec. to select
COMP TBW set screen.
t Push [COMP] to turn the speech compressor ON
or OFF.
t Push [TBW] (F-3) 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. ??)
WIDE : 100 Hz to 2.9 kHz
MID : 300 Hz to 2.7 kHz
NAR : 500 Hz to 2.5 kHz
t Push [COMP] (MF7) or [EXIT/SET] to exit COMP
TBW set mode.
RECEIVE AND TRANSMIT
[COMP]
[MIC GAIN]
SSB
• COMP/TBW set screen
Speech compressor is OFF
Speech compressor is ON
[COMP]
SSB F-3
TBW
"WIDE" setting
4
Main dial
EXIT/SET
EXIT/SET
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