A-M Frequency Coverage And Tracking Alignment - Sony ST-5066 Service Manual

AC
VTVM
sr-5066
NORMAL
oscilloscope
fm
stereo
signat OUT
generator
NORMAL
oi----)
OUTPUT
(R)
^
I
ll
l-
,
I
q
J
Fig.
3-8.
Fm stereo eparation adjustment
test setup
between
left-
and right-channel separation.
rilhile
Signal Generator Method
doing this,
remember
that the output
level
also
changes according to
the setting
of
RT50l.
Test Equipment Required
l.
Signal generator
2. Loop
antenna
3-4.
A-M
l-F
STRIP
ALIGNMENT
3. Ac VTVM or
oscilloscope
Note:
The
a-m
i-f
transformers
(CFT40I
and
procedure:
IFT4OI)
are
shipped
from
the
factory
with all
adjustments
set
for
correct
With the
equipment connected as shown
in
operation. Therefore
no
adjustment
is
Fig.3-9, follow the
procedures given
in
Table
3-3
required
in field
service'
when performing
this
alignment
with
an
a-m
signal
generator. Be sure that the dial is
mechanically
calibrated.
3.5.
A-M
FREOUENCY COVERAGE AND
TRACKING ALIGNMENT
Preparation:
Set
the FUNCTION
switch
to
AM.
Off-the-Air
Signal Method
Frequency
coverage and tracking alignment
can
also
be performed
by utilizing
off-the-air local
a-m
signals. However,
before performing the
alignment,
be
sure
that the dial is
mechanically
calibrated.
f
t
b
Fig.
3-9.
A-m
frequency
coverage
and tracking alignment
test
setup
loop
antenna
a-m
signal
generator
l-
|
AC VTVM
9