Advertisement
t
3.
5.
6.
4.
FM Section
1.
Set
the FM
signal generator
at
400H2 IO\Vr
modulation.
Connect generator
output
to
the FM
antenna
terminals through
a
300S2
balanced dummy
antenna.
Connect
the
oscilloscope, voltmeter, and
dis-
tortion
meter in parallel
across
TAPE REC jack.
Set
the
signal generator
output
level
to
8
-
L0dB.
Set
the
signal
generator and set dials
to
90MHz.
Adjust
cores
of T4
(tuner
assembly) and T1,
T2,
and
T3
to
obtain peak output.
Set signal
generator and set dials
to
L06MHz.
Adjust TC4 (tuner
assembly)
and TC1,
TCz,
and TCB
to
obtain peak output.
7.
Repeat steps
(3)
through (6)
several
times, to
obtain optimum tracking.
8.
Set
the frequency
to
gOMHz and adjust
the Tb
core
of
the
tuner
assembly
to
obtain
peak
output.
9.
Detune the set so
that
noise
only
is
received.
Adjust the primary (bottom) core of T6
so
that
the tuning
meter pointer indicates the
center
position.
10.
Set signal
generator
and set dials
to
98MHz.
Set
signal generator
output level
to
60dB.
Carefully tune
the
set
to
this
frequency
as
indicated by the tuning meter.
11.
Adjust the
secondary
(top)
core
of T6
(tuner
assembly)
for minimum distortion.
TC3
TC2
FM
signal generator
AC
voltmeter
300st
dummy
D
istortion
meter
trotrtroo8o
@
trsoutr
Etrooog
oEr
T3
6
T2
6
26
Oscilloscope
Advertisement
