Performance Verification
4-26 2715 Spectrum Analyzer Service Manual
Verifythe proper operation of the AM and FM Audio Detectors with the
following procedure.
HTest equipmentrequired:
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 FREQ UENCY to a local FM station.
5. Set the REFERENCE LEVEL for a full screen signal.
6. Push ZERO SPAN.
7. Select the FM DEMODULATORby pressing DEMOD 2.
8. Set the LEVEL control for a comfortable listening volume.
9. Plug the headphones into the externalspeaker jack on the right front side of
the Spectrum Analyzer.
10. Check that the speaker shuts offand audio is redirected to the headphones.
11. Tune the Spectrum Analyzer FREQUENCY to an AM station.
12. Select the AM DEMODULATORby pressing DEMOD 1.
13. Check that the LEVEL control does i n 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 aone hour warm up period.
1. Recall default power up settings by pressing UTIL 1 1.
AM and FM AudioDetectorsResidual FM