9
Testing Multimode or Single-mode Links
Step II - Verify Test Jumpers
Disconnect the transmit jumper from the OPM. 10.
Do not disturb the transmit jumper at the OLS end!
If needed, change OPM adapter cap to match receive jumper connector. 11.
Clean both ends of the receive jumper!
Connect the receive jumper to the OPM.12.
Mate free ends of transmit and receive jumpers using the appropriate adapter. 13.
Verify that the insertion loss of this mated connector pair is under 0.75 dB - 14.
maximum allowed by TIA (Noyes recommends 0.4 - 0.5 dB typical):
Observe the displayed value - insertion loss of the test jumpers in [dB]. –
If value is not acceptable, disconnect transmit and receive jumpers at the –
adapter, clean free ends of both test jumpers and repeat steps 13 & 14.
If value is still not acceptable, replace test jumpers and repeat steps 1-14. –
If loss value is acceptable, disconnect transmit and receive jumpers at the adapter.15.
Move the OPM and OLS to opposite ends of the link to be tested.16.
OLS
OPM
Mandrel wrap - MM (shown),
or 30 mm loop - SM
Transmit jumper
Do NOT
disturb this
connection
Adapter
Receive jumper
13
12
11
0.4 dB
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