DIAL SET
MIC
MIC GAIN
METER
NOTE
If
the crystal
calibrator
is
turned on
while
the noise
blanker is
being operated,
the re-
ceiver
will
be desensitized.
This
is
caused
because
the
noise
blanker
reacts
to the
crystal calibrator
square wave
output
as if
it were a
noise
pulse.
The
DIAL SET
is used
to calibrate
the
main
tuning dial.
This
is
done
by
using
the
internal 25 KHz
crystal
calibrator as
a
frequency
standard.
The MIC
jack
is
for microphone
connection.
It is
not necessary
to remove
the
microphone
when
operating
CW.
The MIC GAIN
controls
the amount of audio
from
the
nicrophone
to the nodulation
circuit
of
the transceiver. Increase
this" control
clockwise to the
point
that
the
meter occa-
sionall-y
kicks upward. Further
clockwise
increase will
not cause increased modulation
but wilL
cause the AIC circuit
to
react
t0
control transmitted output and
prevent
flat-
topping.
The
meter
indicates
frsrf
units during receive
and the ALC action during
transnit.
In
trans-
mit any
upward
movement
of
the
meter indicates
normal
ALC action.
An upward movement
past
53
is an indication
that the
MIC GAIN
or
CW GAIN
controls
rnay
be
set
too far clockwise. The ALC
operation
begins
(indicated
by upward
deflection)
when the forward RF output power reaches
noninal
(5
watts
for the SS-15,
50
watts for
the
SS-100
and
100
watts for
the
SS-200)
or when
the
reflected
RF power
reaches 25eo
of this
noninal
power.
The neter zero
control is on
the
rear
panel
and
the sensitivity
control
for
rrsrr
units is internal
and factory adjusted.
A more
detailed
explanation
of
the
neter's
indications
follows and nay be useful
for
understanding
sone of
the
less
frequently
encountered conditions.
-12-
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