Customizing Transmit Signal Characteristics (Ssb/Am); Changing Transmit Bandwidth; Transmit Bandshift; Equalizing Transmit Audio - Kenwood TS-870S Instruction Manual

Intelligent digital enhanced communications system
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CUSTOMIZING TRANSMIT SIGNAL
CHARACTERISTICS (SSB/AM)
The quality of your transmitted signal is important
regardless which on-the-air activity you pursue.
However, it's easy to be casual and overlook this fact
since you don't listen to your own signal. The following
sub-sections provide information that will help you tailor
your transmitted signal.

■ Changing Transmit Bandwidth

Transmit bandwidth is modified via Menu No. 29
(TX.WIDTH). The available selections include:
1800, 2000, 2300, 2600, and 3000 Hz
The default is 2300 Hz. Consult the Bandwidth/
Bandshift Table for additional data. When the
Speech Processor is switched ON, the bandwidth
changes as shown in this table; however, displayed
values do not change.

■ Transmit Bandshift

Transmit bandshift is modified via Menu No. 30
(TX.SHIFT). The available selections include:
0, 100, 200, 300, 400, and 500 Hz
The default is 300 Hz. Consult the Bandwidth/
Bandshift Table for additional data. When the
Speech Processor is switched ON, the bandwidth
changes as shown in this table; however, displayed
values do not change.

Equalizing Transmit Audio

Press [TX EQ.] to toggle the transmit equalizer ON
or OFF. To change transmit frequency
characteristics, access Menu No. 31 (TX EQ.). The
available selections include:
High boost (H)
Comb filter (C)
Bass boost (B)
The default is High Boost.

Microphone AGC

While transmitting, Microphone AGC helps to
prevent distortion due to overly high audio input. It is
disabled while using CW or FSK.
Menu
Function
No.
Microphone
22
AGC Release
Time
Selections
Default
0: Slow
1: Med
1: Med
2: Fast
BANDWIDTH/ BANDSHIFT TABLE
Speech Processor
OFF
TX
TX
Resulting
Bandwidth
Bandshift
Upper
Setting
Setting
Cutoff
(kHz)
(Hz)
Freq.
(Menu
(Menu
(kHz)
No. 29)
No. 30)
0
1.8
1.8
2.0
2.0
2.3
2.3
2.6
2.6
3.0
3.0
100
1.8
1.9
2.0
2.1
2.3
2.4
2.6
2.7
3.0
3.1
200
1.8
2.0
2.0
2.2
2.3
2.5
2.6
2.8
3.0
3.2
300
1.8
2.1
2.0
2.3
2.3
2.6
2.6
2.9
3.0
3.3
400
1.8
2.2
2.0
2.4
2.3
2.7
2.6
3.0
3.0
3.4
500
1.8
2.3
2.0
2.5
2.3
2.8
2.6
3.1
3.0
3.5
7 OPERATING AIDS
Speech Processor
ON
New
New
Lower
Band-
Cutoff
width
Freq.
(kHz)
(Hz)
200
1.6
1.8
2.1
2.4
2.6
1.7
1.9
2.2
2.6
2.6
1.8
2.0
2.3
2.6
2.6
300
1.8
2.0
2.3
2.6
2.6
400
1.8
2.0
2.3
2.6
2.6
500
1.8
2.0
2.3
2.6
2.6
47

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