M/A-Com P5100 Series, Руководство по установке

Страница: 91 / 100

MM102225V1, Rev. B
90
APPENDIX H
VERIFICATION TESTING – TRANSMIT FILTER TUNING
29
Installed Site Cavity Tuning Procedure should also be consulted for Filter Tuning.
1. Installed Site Cavity Tuning Procedure.
2. Power on Agilent® 8920. Select RF GEN from TO SCREEN .
3. Set RF Gen Freq to frequency cavity is to be tuned to.
4. Set AMPLITUDE to -10 dBm.
5. Set Output Port to RF Out.
6. Set AF Gen1 to Off.
7. Select SPEC ANL from TO SCREEN .
8. Select ANT from CONTROLS .
9. Set REFERENCE LEVEL to 0.0 dBm.
10. Keep SPAN at 0.200000 MHz.
11. Set LVL AVG to 20.
12. Connect RF cable from Agilent 8920 RF OUT port to combiner Isolator Input port and connect an RF
cable from the combiner Airline Output port to the Agilent 8920 ANTENNA IN port. Use calibrated
RF cables from the service monitor pack.
13. If signal is not seen at this span set in step 9, widen span to 5 MHz and a coarse tune adjustment will
need to be made.
14. Remove protective sleeve from coarse tune plunger and loosen setscrew. Loosen lock nut for fine
tune plunger. (
NOTE: Use only the fine tune plunger if checking cavity for a drift.)
15. Position fine tune plunger mid-range before adjusting coarse tune plunger. Position coarse tune
plunger to generate maximum spectrum amplitude on display. If plunger refuses to move, tap on it
with handle end of screwdriver.
16. Tighten setscrew on coarse plunger and reinstall protective sleeve.
17. Position fine tune plunger to maximize spectrum amplitude on display.
18. Tighten fine tune plunger lock nut.
19. Reconnect all cables.
20. Finished.
29
Taken from M/A-COM, Inc. Drawing No. GTP-0301, Rev. - .