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Muting Circuit Alignment (FM Stopping Level of Scanning,
FM Stereo indicator threshold Level)
Signal Source
Connection
Signat
Frequency
Indicator
Connection
Set the Digitat
Read out Frequency to:
Adjust:
Multiplex Alignment Procedures (
RF generator
12.5 uV
output to FM antenna
terminal (B)
network
{300 ohms
balanced)
Signal Source
Connection
98.10 MHz
Signal
Frequency
VTVM
to R or L
channel output
(JJ01 or JJO2)
Indicator
Connection
98.10 MHz
Set the Digital
Read out Frequency to:
R131
for 12.5 pV
threshold
Level
(Setting to Auto
position of mode
switch & Low
Level
position of threshold
Level switch)
Function switch in the "FM" position,
Auto/Manua! switch in the Auto position)
Adjust:
RF generator to FM
antenna terminals
(B) through
matching
network
(300 ohms,
balanced), with
1 mV
FM stereo simulator
RF level and Pilot 9%
modulation
No.
modulation &
pilot off
Frequency
counter
to point (D)
(J1 14)
Pilot only
VTVM
to right
and left channel
output
(JJ01 or JJO2)
98.10 MHz
R304 so that Fre-
quency
counter may
precisely read 76 kHz
AM RF Alignment
Signal Source
Connection
Signal
Frequency
Indicator
Connection
Set the Digital
Read out Frequency to:
Adjust:
Apply the signal to
the AM
loop antenna
from the RF gene-
rator, using the test
loop.
As par the
Figure 12(with
3 mV/m)
1400 kHz
600 kHz
[oo
ert
i
VTVM
to LorR
Channel output
(JJO1
or JJO2)
1400 kHz
CAO2 for maxi-
mum
output
600 kHz
LA0O1 for maxi-
mum
output
Repeat step 1 and 2 as necessary to obtain maximum
sensitivity.
R307 so that mini-
mum
output should
be the same in both
channels
Signal Source
Connection
1000 kHz
Signal
Frequency
PLL Oseillator Alignment (Function Switch in the "AM" position)
Indicator
Connection
1000 kHz
Set the Digital
Read out Frequency to:
RA11
so that
signal strength
LED may light
5 point
Adjust:
RF generator to FM
antenna terminals
(B) through matching
network (300 ohms
balanced) with 1 mV
FM stereo simulator
RF level and 100%
modulation (pilot 9%)
Stereo, left
(1,000 Hz)
Stereo right
(1,000.Hz)
VTVM
to right
channel
(JJO1 or JJO2)
VTVM
to left
channel output
terminal
(JJO1 or JJO2)
Repeat step 3 and 4.
4.4 AM ALIGNMENT Procedures (Function Switch in the "AM" position)
AM Local Oscillator Alignment (Scan Step Selector switch (SC51) in the "10 kHz" position)
Signal Source
Connection
Signal
Frequency
Indicator
Connection
98.10 MHz
Set the Digital
Read out Frequency to:
R322 for minimum
output and same
separation in both
channels
Adjust:
DC Volt meter in
30V and 3V
range to point (A)
(J116)
+
1620 kHz
CA16
for 22V
530 kHz
LAO2 for 2.0V
AM
IF Alignment
Signal Source
Connection
Signal
Frequency
Repeat step 1 and 2.
Indicator
Connection
Set the Digital
Read out Frequency to:
Adjust:
Sweep generator to
point (E) (JA07)
450 kHz
marker
Oscilloscope to
point (F) (JA03)
12
Quiet point on band
LAO3 for maximum
and symmetric
response
No signal
Frequency counter
to point (G)
(J117)
Test Loop
13
AM Loop Antenna
1400 kHz
C515 so that
frequency may
precisely read
1850,000 kHz
Figure 12.
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