Am If Alignment - Pioneer TX-600 Service Manual

5-2.
AM
IF
ALIGNMENT
(a)
T\rrn the
selector switch
to
AM.
(b)
Connect the output
leads
of
the
sweep
generator
to
AM
antenna
terminals.
(c)
connect the input
leads
of
the
oscillo-
scope
to the AM
detector
output
terminal
@.
osc
ADJUSTING
POINTS
WHEN ADJUSTING
THE
S.CURVE, REMOVE
THE
CAPAcIToR
c41(q.I p
p).
AFTER
ADJUSTING
s- cuRvE,
coNNEcr rHE cApActroR
c41
(
4.T,tt
p)
T)c6cIcI
Set the output level of the
sweep
generator
to
40
dB.
Adjust the
AM IFT
eores
(Tg,
T10,
Ttt)
as shown
in
Fig.
g.
Make the pattern
symmetrical
with
respect
to
the
center,
coinciding
with
the peak
of the
pattern
to the
oscilloscope
pattern.
LIN EAR
ITY
Fig.
3
S-CURVE
PATTE
R
N
SYMM
ETRY
Fig.
4
9
(d)
(e)
ANTENNA
TERMINALS
DUMMY
ANTEN NA
SWEEP
GENERATOR
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OSCILLOSCOPE
PATTE
R
N
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ILLOSCOPE
IZ
O
N
N
ANTENNA TERMINALS
DUMMY
ANTEN NA
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SWEEP GENERATOR