HP 8924C Assembly page 284

Chapter 6, HP 8924E Performance Verification
RF Analyzer FM Bandwidth Performance Test 24
Procedure
284
1. Press the PRESET key on the Test Set.
2. Access the CONFIGURE screen, and set the RF Display field to Freq.
3. Set the Input Port field to Ant.
4. Access the ANALOG MEAS screen, and set the Tune Mode field to Auto.
5. Set the IF Filter field to 230kHz.
6. Set the front-panel SQUELCH control full counter-clockwise (open).
7. Allow the Test Set to tune to the input signal, and then set the Tune Mode field to
Manual.
8. Set the AF Anl In field to FM Demod. ,
9. Set the Filter 1 field to <20 Hz HPF, and set the Filter 2 field to >99 kHz
LPF.
10. Set the Detector field to Pk+.
11. Set the audio analyzer to the following frequencies and record the FM deviation
displayed on the measuring receiver for each frequency (check the deviation measured
by the measuring receiver at each frequency and adjust the audio analyzer amplitude if
needed to make sure it is 25 kHz): 20 Hz, 100 Hz, 1000 Hz, 10 000 Hz, 35 000 Hz,
70 000 Hz.
12. The result of this test is the ratio of the maximum to the minimum measured deviation.
Calculate the ratio in dB as follows:
The test limit is max 3 dB.
24" on page 395.
max. deviation
Result (dB) = 20 log ---------------------------------- -
min. deviaiton
See "RF Analyzer FM Bandwidth Performance Test
N:\mkt\MANUALS\HP8924C\ALR\24e_pt.fb