13
Testing Multimode or Single-mode Links
Step II - Verify Test Jumpers
9. Disconnect the transmit jumper from the MFP.
Do not disturb the transmit jumper at the OLS end!
10. If needed, change MFP adapter cap to match receive jumper connector.
Clean both ends of the receive jumper!
11. Connect receive jumper to the MFP.
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 -
maximum allowed by TIA (AFL 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.
14. If loss value is acceptable, disconnect transmit & receive jumpers at the adapter.
15. Move the MFP and OLS to opposite ends of the link to be tested.
OLS
MFP
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
