Sstv (Slow Scan Tv) Operation; Operation With A Phone Patch; Use Of Monitor Switch; Novice Operation - Kenwood TS-820 Operating Manual

4.20 SSTV (SLOW SCAN TV) OPERATION
SSTV operation can be accomplished by simply connecting
the output of SSTV camera to the PHONE PATCH IN jack
[or
MIC connector1 and the input o f SSTV monitor t o the
PHONE PATCH OUT jack (or SPEAKER jack).
Wllen transmitting signals from the SSTV camera. adjust its
output so that the input power of the final stage is less than
l 0 O W (less than 1 2 5 mA lpl.
4.21 OPERATION WITH A PHONE PATCH
The r S - 8 2 0 has rear panel lacks to f a c ~ l ~ t a t e uslng the 1 s -
8 2 0 w ~ t h a phone patch The PHONE PATCH OUT fack has
an impedance of 6 0 0 ohms and the PHONE PATCH IN fack
requlres a hdgh Impedance Input See the lnstructlon sheet
of the phone patch for cablang Instructdons
4.22 USE OF MONITOR SWITCH
To monitor the quality of transmit signal during SSR
operation. set the MONITOR switch to ON to demodulate
part of transmit IF signal.
This feature is useful when checking modulation conditions
or adjusting the RF speach processor.
When monitoring, use a headphone to avoid howling effect.
Note that if the H , SW switch is OFF or the DRIVE knob 1 s
incorrectly adjusted. the ALC circuit does not operate
properly, causing the level of transmit IF signal t o become
extremely high which results is distortion in the signal being
monttored.
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Fia. 10 RTTY Freauencv
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4.23 NOVICE OPERATION
The Kenwood TS-820 offers the unique opportunity to the
beginning amateur
of
buying a top quality ham rig which
adapts to novice operation at very llttle cost. So the initial
equipment investment is good for what ever level of license
to which the operator advances.
For the novice to operate the Kenwood within the legal po-
wer limitat~on, all he has to do is remove one of the final tu-
bcs from the final RF section and replace it with a low cost
module available from your dealer. Alternately adjust the
carrier level control
T O
keep the plate input power below 7 5
watts [approximately 9 0 ma]. Adjusting the carrier level
yields much less power output because it reduces the effi-
ciency of the tubes.
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.
F S K
NARROW
Fig. 11 Change of t h e FSK WIDE-NARROW
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