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Performance Verification
4-26
2715 Spectrum Analyzer Service Manual
Verify the proper operation of the AM and FM Audio Detectors with the
following procedure.
H Test equipment required:
Antenna
Headphones
1. Recall default power up settings by pressing UTIL 1 1.
2. Connect the Antenna to the RF INPUT.
3. Select the following settings on the Spectrum Analyzer:
SPAN/DIV 2 MHz
RESOLUTION BW AUTO
4. Tune the Spectrum Analyzer FREQUENCY to a local FM station.
5. Set the R EFERENCE LEVEL for a full screen signal.
6. Push ZERO SPAN.
7. Select the FM DEMODULATOR by pressing DE MOD 2.
8. Set the LEVEL control for a comfortable listening volume.
9. Plug the headphones into the external speaker jack on the right front side of
the Spectrum Analyzer.
10. Check that the speaker shuts off and audio is redirected to the headphones.
11. Tune the Spectrum Analyzer FREQUENCY to an AM station.
12. Select the AM DEMODULATOR by pressing DEMOD 1.
13. Check that the LEVEL control does in fact control the AM audio level.
14. Disconnect the antenna from the RF INPUT and the headphones from the
external speaker jack.
Performance requirements are:
≤2 kHz total excursion in 20 ms not phase locked
≤100 Hz total excursion in 20 ms phase locked
This check requires a one hour warm up period.
1. Recall default power up settings by pressing UTIL 1 1.
AM and FM Audio
Detectors
Residual FM