TFT 844 - Page 12

www.SteamPoweredRadio.Com
13.
METER
CAL
adjust
14.
PHASE
CAL
adjust
15.
ANT
INPUT
LEVEL
16.
PEAKS/MIN
RESET
17.
CHAN
SELECT
switch
18.
Channel
Indicator 1
ights
19.
FREQ
ADJ
20.
FREQ
COUNTER
-11-
3)
Attenuation switches
from
odb
to
-50
(100%
to
.3%}
inserts
the attenuation
marked
resulting
in
the
algebraic
sum
of
signal
and
attenuation.
4)
Signal
select
provides
the selected signal
to
the
meter.
Used
to
calibrate
the
all
three meters to
100%
modulation.
When
the phase cal switch
is
depressed the phase cal
control can
be
adjusted for
a null
on
the
LEFT/TEST
meter.
To
indicate
that
the
internal
38
KHz
signal
is
in
phase with the
19
KHz
pilot
signal.
This insures
that
the best channel separation
has
been
attained
so
that
the best
stereo
measurements
can
be
made.
Indicates the level of the
RF
from
the antenna
on
the
total
modulation meter.
(Push
to read switch).
Resets the peaks
min
counter.
Allow
selection
of
one
of
the
two
channels selected
by
the
programmable
thumbwheel
switches.
Lighted
lamp
indicates
which
frequency
has
been
selected.
Read
thumbwheel
sw
itches.
Control
to
adjust the
frequency of the
9.80
KHz
oscillator
circuit.
Selects
from
3 frequencies
which
can
be
supplied to the
freq. counter
BNC
on
front
panel:
1)
900
KHz,
2)
9.80
KHz
and
3)
19.0
KHz.