HP 8924E, Assembly

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Chapter 6, HP 8924E Performance Verification
RF Analyzer FM Bandwidth Performance Test 24
N:\mkt\MANUALS\HP8924C\ALR\24e_pt.fb
Procedure
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. See "RF Analyzer FM Bandwidth Performance Test
24" on page 395 .
Result (dB) 20
max. deviation
min. deviaiton
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