Manualshelf

User's Manual

ManualsBrandsADC Telecommunications ManualsElectronicsDigivance® 800 MHz Indoor Coverage Solution
11121314151617181920
ADCP-75-130 • Issue 3C • August 2006
Page 54
© 2006, ADC Telecommunications, Inc.
6. The PORT OK/NOK LED will turn either blinking red or green. If the LED turns
blinking red, the optical port is faulty. Replace the optical transceiver and then recheck
system operation. If the LED turns green, the optical port is good. Proceed to step 7 to
continue the test procedure.
7. Place the PORT ON/OFF switch in the OFF position (press O).
8. Disconnect the loopback from the DHU or supporting DEU.
9. Clean and then reconnect the optical fiber connectors to the DHU or DEU optical port.
10. Disconnect the optical connectors at the DRU optical port or remote DEU host port (far
end of fiber).
11. Clean the optical fiber connectors and then using an LC optical adapter, connect the
loopback to the connectors as shown in Figure 26.
16768-B
OPTICAL
ADAPTER
OPTICAL
LOOPBACK
OPTICAL
CONNECTOR
NOTE: iF THE DISTANCE BETWEEN THE DHU/DEU AND THE
DRU EXCEEDS THE DISTANCE SHOWN BELOW, THE
REMOTE LOOPBACK TEST WILL NOT WORK.
62.5 MICRON MULTI-MODE FIBER - 250 METERS
50 MICRON MULTI-MODE FIBER - 375 METERS
9 MICRON SINGLE-MODE FIBER - 5 KILOMETERS
Figure 26. Optical Fiber Loopback Test
12. Insert a dust plug into the DRU optical port or remote DEU host port.
13. At the DHU or supporting DEU, place the PORT ON/OFF switch in the ON position
(press I).
14. The PORT OK/NOK LED will turn either blinking red or green. If the LED turns
blinking red, one of the optical fibers is faulty. Refer to Subsection 6.4.2 to isolate which
fiber is at fault. If the LED turns green, the optical fibers are good. Proceed to step 14 to
finish the test procedure.
15. At the DHU or supporting DEU, place the PORT ON/OFF switch in the OFF position
(press O).
16. Disconnect the loopback and the optical adapters from the optical fiber connectors.
17. Place a dust cap over the connector for each optical fiber
18. Remove the dust plug from the DRU optical port or remote DEU host port.
19. Plug the loopback into the DRU optical port or DEU host port as shown in Figure 27.
20. If testing a DRU that is powered by the DHU or by a supporting DEU, place the PORT
ON/OFF switch in the ON position (press I).