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ADJUSTMENT PROCEDURES
Equipment required:
Notes:
1, AM signal generator
1. Signal input must be as low as possible to avoid overload and
2. FM signal generator
clipping. (Use highest sensitivity of output indicator.)
3. VTVM
2. Volume control at maximum.
4, DC voltmeter
3. Standard modulation is 400Hz at 30% amplitude for AM,
5. FM/AM IF sweep generator
1000Hz at 22.5kHz deviation for FM (Mono).
6. Oscilloscope
4. Connect 8 ohm load acros speaker terminal.
AM IF Adjustment
Signal Source
Signal. 'Generator
Output
Frequency
Adjustment
Remarks
Frequency
Setting
AM IF sweep
'
Adjust for
generator
Sweep centered
Oscilloscope
maximum &
connected to
450kHz
connected to
1000 kHz
ET
symmetrical
pin 18 of IC1.
AM antenna.
curve.
DC voltmeter
DC voltmeter
Ne
Adjust for
connected to
terminal
AM antenna.
1400kHz
1400kHz
ei
(1404kHz)
(1404kHz)
Repeat adjustments as necessary to minimise tracking error.
FM IF Adjustment
;
Signal Generator
Frequency
.
FM IF sweep
generator
Sweep centered
connected to FM
10.7MHz
antenna.
Adjust for
IFT 1 on the | maximum &
frontend
| symmetrical
curve.
Oscilloscope
connected to
pin 18 of IC1.
FM RF Adjustment
Signal Source
Sede eee
Output
Pe,
Adjustment | Remarks
Frequency
Setting
DC meter to
DC voltmeter
87.9MHz
as
FM signal | 8?5MH260dB | io gpvco | — (87.5MHz)
Payee
generator
Seas
connected to FM
VTVM
L3,L17,L19}
Adjust for
onthe front | maximum
end
output
PTS-303/505/7¢
PTS-307/507/7(¢
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