Tektronix TekRanger 2 TFS3031, Руководство по обслуживанию

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Performance Check – TekRanger 2 (serial nos. B052000 and above)
4–8
TFS3031 TekRanger/TekRanger 2 Service Manual
7. Cleave the 1310-nm and 1550-nm legs of the WDM. Inspect these cleaves
under a microscope to insure cleave quality.
8. Permanently protect cleaves from contamination.
9. Connect a Tektronix TFP2A with an FS1315 module to the FC/PC
connector. (The TFP2A must have firmware version 1.03M or higher.)
10. Turn on power to the TFP2A.
11. Press MODULE SELECT to select the 1310-nm module.
12. Press the
Change Settings
softkey to enter the menu system and set the
following parameters:
Pulse Width: 5 m HR
Max Range: 1.5 km
Number of Averages: 1 minute
13. Press Exit .
14. Press
START/STOP
to acquire a waveform.
15. Position the active cursor on the reflection at 1.1 km.
16. Press the EXPAND button to expand the view.
17. Use the vertical and horizontal
SIZE
knobs to adjust the expansion window
so that approximately 50 m before the reflection and 50 m after the reflection
are visible, and that the top and bottom of the reflection are visible.
18. Position the active cursor at the rising edge of the reflection.
19. Press the Return Loss softkey, then the Event Return Loss softkey to
display the event’s reflectance.
20. Make a loop in the 1310-nm leg of the WDM, and adjust the loop size so the
TFP2A reports a reflectance of -40 dB
±
1 dB. (This is an iterative process.
Adjust, measure, repeat until the TFP2A reports -40 dB.)
21. Permanently secure the bend.
22. Repeat steps 9 through 21 at 1550 nm on the TFP2A and the 1550-nm leg on
the WDM.