Table of Contents
Advertisement
ost seeeea tT)
ANSS
ADJUSTMENT
. Set the band selector switch at ''FM" position.
. Apply a 19 kHz signal of 30 mV to (TP6).
Connect
a VTVM and/or an oscilloscope to (TPQ).
. Adjust L10 for minimum output at- (TPQ).
. Then, apply a1 kHz signal of 100 mV to (TP6).
NOOR
WN
=
Make sure that there is no output at pin 6, applying a 100 kHz signal of 50 mV further to pin 13.
Next, make sure that a 1 kHz signal of 100 mV appears at (TP6), connecting (TP-8) to earth.
THE
INSTRUCTION
OF
FREQUENCY
ADJUSTMENT
in Figure 7.
MUTING
CURVE
ADJUSTMENT
(Fig. 11—1
and
11—2)
1. Place the set in FM
mode.
2. Set FM signal generator to produce a signal of 98 MHz
{modulated at 22.5 kHz), 54 dB, and connect this signal
to the antenna
terminal
of the set.
3. Tune
in the signal of 98 MHz, and adjust the Volume
control
so that the speaker
output
becomes
1.4 V on
VTVM
(across a resistor of 4 ohms).
(Balance control:
Mechanical
center).
4. Set FM signal generator to produce a signal of 98 MHz
'(modulated at 22.5 kHz), 20 dB, and tune in this signal.
5. Adjust the semi-variable resistor VR1
so that the speaker
output
becomes
1V
on
VTVM
(across
a resistor
of
4 ohms).
FM. SIGNAL
GENERATOR
ATTENUATOR
.
ANTENNA
SPEAKER
OUTPUT
LEVEL
{
°
10
20
30
40
mm
(dB)
SG OUTPUT LEVEL,
Figure 11—1
(SG Output vs Speaker Output)
SPEAKER
OUTPUT
)
)
a
GND
Figure 11-2
—-Ti—
Advertisement
Table of Contents
