![background image](http://html.mh-extra.com/html/icom/ic-756proiii/ic-756proiii_instruction-manual_612299073.webp)
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
fi
lter width from wide, middle and narrow.
• The
fi
lter functions regardless of the speech compres-
sor use.
• The following
fi
lters are speci
fi
ed 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
fi
lter.
• Transmit
fi
lter 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