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Five kinds of ceramic filter (CF1, CF2) are available for this
set. The
difference
of central
frequency
from
each other
can be known by the color indication. The table below shows
such a. difference of IF and S curve, depending upon the color
indications of the ceramic filter (CF 1 , CF2).
| |
Black
| 8 | Blue | 10.67MHz + 30kHz _|
fotA | Red | 10.70MHz + 30kHz |
Central
©
Frequency
For their employment, it is required to use two ceramic filters
of same type.
Figure 10—1
FM STEREO
AND
SEPARATION
ALIGNMENT
Set the band
selector switch
at "'FM'' position.
SIGNAL
GENERATOR
:
RECEIVER
STEP | CONNECTION TO
INPUT SIGNAL
DIAL
RECEIVER
FREQUENCY
SETTING
98MHz
Adjust so that the fre-
Connect the frequency
VR3
quency becomes 19.0kHz.|
counter (or oscilloscope)
(In case an oscilloscope is | through a 100K ohm
i
connected to the test
resistor to TP10 (3 pin
point TP10, adjust the
of IC3).
signals to be 19kHz by
using Lissajou's wave-
form).
FM Signal generator
Same as
The VR2 should be ad-
Same as step 1.
98MHz
step 1.
(External modulator)
FM Stereo modulator
Pilot:
9%
;
(6.75kHz dev.)
Signal:
400Hz, 91%
;
(68.25kHz dev.)
justed so that the output
Repeat steps 1 and 2 until no further improvement can be made.
METER
CONNECTION
ADJUSTMENT
Refer to Figure 10—2.
level L (or R) of the
speaker might come to
be lowest by generating
the output signal of the
FM stereo modulator on
Right side {or Left side)
only.
If without the frequency counter, proceed with the alignment as follows. While receiving an FM stereo signal, turn the VR3 until
the P.L.L. will be locked
(when it is locked, the stereo indicator will be lit). Then, reversely turn the VR3 halfway and fix it.
FM
SIGNAL
SPEAKER
GENERATOR
TERMINAL
SET
FM
stereo
Modulator
°0 ANTENNA
(See Figure 9.)
Figure
10—2
—~10—
Ae
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