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SG165 CALIBRATION PROCEDURE
SG165 SETTINGS
Function - 400 Hz Sine Wave
Speakerload - Speakers
Power Range - Separation Test
Left and Right - Off
400 Hz
Pilot 19 KHz - 0
FM Modulation - IHF MPX
AM Modulation - 0
RF Tuning - Fully CCW
Marker Height - Mid-scale
AM/FM IF Rocker - Mid-scale
Microvolt Output - X1000
Microvolt Output
Adjustment - Fully CW
EQUIPMENT NEEDED
Scope - SC61
Frequency Counter - FC71
RF Voltmeter - Boonton
POWER SUPPLY
1. Measure voltage on positive lead of C105.
2. Adjust R113 for a negative voltage of equal value as measured at the negative lead of C106.
400 HZ SINE WAVE
1. Connect scope to “all signal output” of SG165.
2. Adjust R375 for frequency of 400 Hz.
3. Level should be about 30 VPP with direct lead.
4. Switch to 400 Hz square wave.
5. Signal should be of same frequency and amplitude as sine wave.
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