8-25
Performance Tests
Residual FM Performance Test
Configure the Audio Analyzer
1. AC level mode
2. CCITT weighting filter
3. 30 kHz low-pass filter
4. Set low input to ground
Configure the Synthesized Signal Generator
1. Amplitude +16 dBm
2. Frequency CW (LO frequencies on test record)
3. Modulation off
Configure the 8648
1. Turn modulation off; press MOD ON/OFF.
2. Set the amplitude; press
AMPLITUDE 4 dB(m).
3. Turn the RF output on; press
RF ON/OFF.
Measure Deviations
1. Enter the frequencies shown in the test record.
2. Record the test results and compare the results to the limits in the test record.
NOTE The voltage displayed by the audio analyzer can be read as Hz. For example,
10 mV equals 10 Hz.
Test Record
• 8648A: Table 8-12.
• 8648B: Table 8-33.
• 8648C: Table 8-58.
• 8648D: Table 8-83.
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