Table of Contents
13. Demodulator Adjustment
A4 log amplifier/Cal oscillator assembly
There is no related performance test for this adjustment.
A 5 kHz peak-deviation FM signal is applied to the INPUT 500. The detected audio is
monitored by an oscilloscope. FM DEMOD is adjusted to peak the response displayed on the
oscilloscope.
SIGNAL GENERATOR
AM/FM signal generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 8640B
Oscilloscope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 54501A
Adapters
Type N (m) to BNC (f) (2
Type N (f) to APC 3.5 (f)
OUTPUT
ADAPTER
Figure 2-2 1. Demodulator Adjustment Setup
required) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(Option 026 only) . . . . . . . . . . . . . . . . . . . . . . . . .1250-1745
13. Demodulator Adjustment
DIGITIZING
OSCILLOSCOPE
ADAPTER
Adjustment Procedures 2-53
A3
1250-1476
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