OTDR TESTING
APPLICATIONS
7
STEP 3
Set the MPO switch to the MPO channel that corresponds to the specific MPO fiber to be tested. Usually this will be MPO
switch Channel 1 when testing all of the fibers in the MPO cable
Testing 12-fiber MPO cables with an OTDR and DataCenter 12 MPO Optical Switch
STEP 1
Power ON both the OTDR and the MPO Switch.
STEP 2
Connect the OTDR and optical switch to the MPO cable under test using the accessories as shown below.
SC/UPC-SC/UPC patch cable (ensure correct fiber type)
25-meter MPO OTDR launch cable (ensure correct fiber type; use Type B)
MPO adapter (Type B)
OPTIONAL:
if you want to include the far end MPO connector in the OTDR test, attach another MPO adapter ( ) and MPO OTDR
launch cable ( )to the end of the MPO cable under test
However, based on the polarity of the MPO cable under test, please be aware that the fibers may or may not be numbered the same on
the opposite end of the MPO cable. Take this into account when testing in the opposite direction.
Repeat Steps 4 and 5 until all fibers in the MPO cable have been tested.
IMPORTANT NOTE:
the MPO cable under test will typically be tested from the right-most fiber (Channel 1) to the left-most (Channel
12) as seen from the perspective of the near-end MPO connector.
STEP 4
Run the OTDR test, and save the results.
STEP 5
Press the UP arrow button ( ) to change to the next channel.
25-METER MPO
LAUNCH CABLE
(TYPE B)
MPO ADAPTER
(TYPE B)
MPO CABLE UNDER TEST
1
12
1
12
