Internal Cross Channel Operation; Mobile Operation - Kenwood TS-820S Instruction Manual

4.16 INTERNAL CROSS CHANNEL
OPERATION
OPERATING PRINCIPLE
The speech processor is inserted between the first and se-
cond stages of the microphone amplifier as shown in Fig
(AI. The MIC gain control is used to adjust the 8M. input
level.
The TS-820S contains a unique design feature which allows
cross channel operation without a separate external VFO
'The TS-820S's internal VFO is used together with the fixed
frequency oscillaltor to allow reception and transmission on
different frequencies The fixed channel oscillator must have
one or more accessory crystals installed for this feature to
work
MIC AMP 1 ON
D
0
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MIC i ?,
Fig. (AI
4.17 MOBilE OPERATION
OPERATING CHARACTERISTIC
The speech processor functions so that the output of the
MIC AMP 2 is maintained constant when the MIC input
level exceeds -65 dB. as shown in Fig. (B). It also func-
tions so that the output remains unchanged when the
processor is set to ON and OFF at -40 dB of MIC Input
level.
The CaMP LEVEL knob is used to adjust the compreliSlon
level. It does not adjust the output of the microphuI18
amplifier
The compact size and solid-state design of the TS-820S make
It Ideal for mobile use. by using optional DS-1 A
Be sure to use a mobile antenna IIIIhlCh meets the require-
ments described in Section 2
The normal operating procedures described previously. ap-
ply to mobile operation The noise blaker should be used to
reduce ignition and impulse noises for clear reception Re-
member that during transmission the transceiver draws
about 15 amps so be careful not to drain the car's battery.
MICROPHONE SENSITIVITY
For proper function of the speech processor. the range of
microphone input sensitivity is limited The T8820 is fac-
tory adjusted to operate the processor at the input sensitivity
of MC-50 (see Note below).
If the sensitivity of your microphone is higher (eg. -30 dB)
than MC-50. the output of the MIC AMP 2 is decreased
when the processor is set to ON. See Fig. (B).
4.18 OX OPERATION (Use of PROCESSOR)
In SSB operation (particularly during OX operation), if your
transmit signals are too weak for your party and cannot be
received clearly by your party. the talk-power can be in-
creased by using the speech processor.
The speech processor is activated by simply pulling the
COMP LEVEL knob toward you.
'5
s-
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0
n.
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-t
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Fig. (8)
ADJUSTMENTS
1 Connect microphone and set the transceiver in transmit
mode (USB or LSB).
2. Set the METER switch to CaMP
3. Speak into the microphone in normal tone of voice.
The meter pointer will deflect according to the strength
of your voice.
4. Adjust the CaMP LEVEL knob so that the meter in-
dicates about 20 dB on rhe CaMP scale at peak inputs.
5 Next. set the METER switch to ALC.
6. Speak into the microphone in normal tone of voice.
7 Adjust the MIC (MIC gain) knob until the meter pointer
deflects into the ALC scale
In this case. insert an attenuator as illustrated on page 6 and
adjust the MIC input to the proper level
NOTE: MC-50: Sensitivity to be --55 dB ::\:3 dB at about
5 cm from microphone
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