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TC2100 DM
User's Manual
Ver. 1.6
MNL-21000-01-16
Optic Loopback Bench Test
(for master only)
(not applicable for RS-485)
Purpose:
To test the broadcast and receive capabilities of the Master unit without a Slave unit
attached.
Equipment
Requirements:
One (1) Bit Error Rate Test (BERT) Set with an appropriate interface module.
One (1) optical jumper cable (patch cord) with appropriate connectors.
Procedure:
Set up the bench test as shown in Figure 18. Remove power, alarm, and DB25
connectors from the rear of the TC2100. Unscrew the two flathead screws on the
TC2100's front panel. Gently slide the unit out of the housing. Set the switch 3 of the
internal DIP switch (SW1) to the right (On) position and all others to the left position.
Connect an optic patch cord from "TxA" to "RxA." Connect a BERT tester to the DB25
connector. Set the tester up as a DTE device
(set the tester up as a DCE device if the
TC2100 was factory configured as a DTE)
. The BERT tester should indicate a
"SYNC" signal.
Remove the patch cord from "TxA" and "RxA." The "SYNC" light on the tester should
turn "Off." Repeat the steps above with an optic patch cord from "TxB" to "RxB."
Figure 18. Optic Loopback Bench Test Connection Diagram