Extron Electronics Fiber Optic Test Set Setup Guide - Manual (Page 6)

FPM/FLS 101 • Quick Start Guide (Continued)
6
FPM 101
0.4 dB
N
M
Coupler
or
Bulkhead
Receive Reference
Cable Transmit Reference
Cable
N
Adapter Cap
MM: Mandrel Wrap or
SM: 1.2" (30 mm)
Dia Loop (Shown)
Do Not Remove
This Connection
FLS 101
Verify the Receive Reference Cable
9. Disconnect the transmit reference cable from the power meter.
10. Select and prepare the receive reference cable (fiber type, SM or MM, must match the
link to be tested).
NOTE: Clean both ends of the receive reference cable before proceeding.
11. Connect the receive reference cable to the FPM 101 using an appropriate adapter cap.
12. Connect the free ends of the transmit and receive reference cables together with a
coupler or at the bulkhead.
13. Verify the insertion loss (dB) of the transmit and receive reference cable pair is less than
0.75 dB, the maximum allowed by TIA standards (Extron recommends 0.4 to 0.5 dB).
If the insertion loss (dB) is not within these values:
z
Disconnect the transmit and receive reference cables at the coupler (or bulkhead),
and clean the free ends of both reference cables and the coupler (or bulkhead).
Disconnect the receive reference cable from the power meter and clean it, then
repeat steps 11 through 13.
z
If the value is still not acceptable, replace both reference cables and begin again
with step 1 on page 5.