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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 of SSTV monitor to 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
l0OW (less than 125 mA lpl.
4.21 OPERATION WITH
A
PHONE PATCH
The rS-820 has rear panel lacks to fac~l~tate uslng the 1s-
820 w~th a phone patch The PHONE PATCH OUT fack has
an
impedance
of 600 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
1s
incorrectly adjusted. the ALC circuit does not operate
properly, causing the level of transmit IF signal to become
extremely high which results is distortion in the signal being
monttored.
1
Fia.
10
RTTY
Freauencv
1
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
TO
keep the plate input power below
75
watts [approximately 90 ma]. Adjusting the carrier level
yields much less power output because
it
reduces the effi-
ciency of the tubes.
I
.
FSK
NARROW
Fig.
11
Change of the FSK
WIDE-NARROW
I