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QUICK REFERENCE GUIDE
2001 NEW
Verify you have selected a clear frequency
and call out your CQ!
The capability of changing the pass band of your
transmit audio, is at your nger tips. Regardless of the
condition of the speech compressor, you can adjust it
by selecting the [F4 TBW].
You will nd this located in the M1 menu. By pushing
[F4 TBW] for 1 sec. you can select the TX audio band
pass.
There are three levels of audio passband width avail-
able (Wide, Mid, and Nar).
TX Audio Passband widths
Wide : 2.8 kHz ; Great Full Audio
Mid :2.4 kHz ; Great for operators with
deep full voices
Nar : 2.2 kHz ; Great for breaking through
pile ups
F 1
F
2F
3
F
4
F
5
F 1
F 2 F 3 F 4 F 5
AGC
DUP
CMP
TBW
SCP
AGC
DUP
CMP
TBW
SCP
TX
BW=WIDE
Push [F4]
Push [F4] for 1 sec. to select the transmit filter width.
The selected transmit filter width
is displayed for approx. 1 sec.
3. DSP TX Audio Pass Band
4. Microphone Equalizer
Although these bandwidths are xed, the Microphone
Tone Control will give you more audio control for your
voice operation on SSB, AM, and FM modes. Your IC-
7400 is equipped with a very powerful equalizer sys-
tem with 121 possible combinations. This is achieved
by using the separate bass and treble adjustments.
The default for both the Base and Treble is at 0 dB.
Entering Microphone Tone Control set mode:
q Push [MENU] several times, or until M2 is shown
on the display.
w Push [F4 TCN] for the Tone Control set mode.
e Push the appropriate mode switch to adjust SSB,
AM, or FM.
r Push [F1 ] or [F2 ] to change to the desired
component.
Hint!
Voice patterns and audio characteristics vary with
each operator, therefore the [MIC GAIN], DSP TX
Audio Pass Band and Microphone Tone Control
settings will be different for each operator. Actual on
air experimenting is necessary to get just the right
sound. Listen to your transmit audio with head-
phones and the monitor function turned ON. Its
also best to test and adjust your audio on the air,
while someone who knows what your real voice
sounds like listens, and provides and opinion on
your audio quality.
[F1 ]
Tuning dial[MENU]
[F2 ] [F4 TCN]
1. TX Bass
This item adjusts the bass level of the transmit audio
tone from 5 dB to +5 dB in 1 dB steps.
TX
Bass
SSB
O
1
2. TX Treble
This item adjusts the treble level of the transmit audio
tone from 5 dB to +5 dB in 1 dB steps.
TX
Treble
SSB
O
2
IC-7400.qxd 02.4.2 11:35 Page X
13


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