Advertisement
ALIGNMENT
PROCEDURES
INSTRUMENTS
REQUIRED
1. AM Sweep Generator
2. AM and FM Signal Generator
3. Vacume Tube Voltage Meter (VTVM) AC, DC
4. Oscilloscope
5. Distortion Analyzer
6. Stereo Modulator
7. Frequency Counter
(1) AM IF ALIGNMENT
1. Set SELECTOR
switch to AM.
2. Set radio dial to quiet point.
AM Sweep
Generator
Adjust
AM Output
GENERAL
ALIGNMENT
CONDITIONS
1. Signal input should be kept as low as possible.
2. Standard modulation is 400Hz 30 % (AM), 400Hz
100 % (FM MONO) pilot 10% sub and main 90%
(FM STEREO).
Oscilloscope
Oscilloscope
Vv
Remarks
X103 (CFZ-455C)
Maximum
Symmetrical
Usually not necessary
Response
to adjust
(2) AM RF ALIGNMENT
1. Remove a screw on the AM antenna cover.
Loop Antenna
AM
Signal
60cm
iment [ct
Set Signal
Set Radio Dial
Bar Antenna
XI
Tx-1s00 | —Ovtpet J ac vive
Oscilloscope
Pd
Adjust
VTVM reading
Remarks
515 KHz
400 Hz 30 %
Lower end
(515 KHz)
L103
NMO-2503
Maximum
Repeat step 1 and
1680 KHz
400 Hz 30 %
600 KHz
400 Hz 30 %
Upper end
(1680 KHz)
600 KHz
|
LOO5
2 as necessary
TC-002
Maximum
Maximum
Repeat step 3 and
NMA-1008
1400 KHz
1400 KH
400 Hz 30 %
(3) FM FRONT
END ALIGNMENT
1. Set SELECTOR
switch to FM.
2. Push MUTING
switch to off.
4 as necessary
TC-001
Maximum
3. Connect FM Signal Generator to 300-ohm antenna terminals.
4. Connect
DC Voltmeter
to TP-1
terminals.
30022
Voltmeter
Advertisement
