Testing Duplex

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Testing Duplex
This document will demonstrate how to test duplex assemblies with JGR’s MS12001 cable
assembly test system.
In the following example, a duplex LC assembly will be tested with a bidirectional test type.

Two methods will be shown: without a switch and with an MS7 switch module.
An added benefit of using an adapter with a single hole to test duplex is that it confirms the DUT
polarity during the IL/RL testing.
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Duplex LC: DA128 tri-LC detector adapter
Duplex SC: DA103 SC detector adapter

Testing Duplex
Method 1: without a switch
Begin by configuring a connector with pass/fail limits and the DUT as duplex.

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Testing Duplex
Method 1: without a switch
Start a test with the created DUT.

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Testing Duplex
Method 1: without a switch
Connect the master test jumper (MTJ) as below.

DA128
Tri-LC detector
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FC/APC – LC/UPC(MTJ)Testing Duplex
Method 1: without a switch
Select Reference Acquisition and click Start.

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Testing Duplex
Method 1: without a switch
The fibers will be tested one at a time. The software will pause to allow the operator to switch
over the MTJ in the mating adapter and the DUT in the detector.

Test Fiber #1

Test Fiber #2

FC/APC – LC/UPC(MTJ)

2*LC/UPC – 2*LC/UPC(DUT)
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Testing Duplex
Method 1: without a switch
After measuring fibers #1 and #2 of side A, flip the DUT to measure side B. Enter a serial number
and press Next DUT to save the results.

Note: a pass IL result can only occur with the correct polarity. The DA128 (tri-LC) and DA103(SC) only allow light to go through the center hole. Incorrect polarity will display as no light (veryhigh IL > 40 dB).

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Testing Duplex
Method 2: with an MS7 switch module
For faster testing, a switch can be used to allow for 2 master test jumpers. JGR’s switches haveexcellent repeatability (± 0.005 dB) which make them invisible to power readings. For thismethod, configure a multifiber-to-multifiber DUT.

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Testing Duplex
Method 2: with an MS7 switch module
Start a test with the created DUT then go to Switch Port(s) Configuration. Add a pause before
channel 2 so the operator has time to move the DUT in the detector from position 1 to 2.

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Testing Duplex
Method 2: with an MS7 switch module
Go back to the measurement screen and reference each MTJ.
DA128
Tri-LC detector
adapter

FC/APC – LC/UPC(MTJ fiber #1)
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FC/APC – FC/APC(MS12 output to MS7common)

FC/APC – LC/UPC(MTJ fiber #2)

Testing Duplex
Method 2: with an MS7 switch module
The reference order is as follows:
1. IL fiber #12. Pause for operator
3. IL fiber #2 and length fiber #1
4. Pause for operator
5. Length fiber #2.
Note: during length reference, the connector does not have to be in the detector.

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Testing Duplex
Method 2: with an MS7 switch module
With this method, only the detector side connector must be moved to test each fiber.

Test Fiber #1

FC/APC – LC/UPC(MTJ fiber #2)

FC/APC – LC/UPC(MTJ fiber #1)

2*LC/UPC – 2*LC/UPC(DUT)
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Test Fiber #2

Testing Duplex
Method 2: with an MS7 switch module
After measuring fibers #1 and #2 of side A, flip the DUT to measure side B. Enter a serial number
and press Next DUT to save the results.

Note: a pass IL result can only occur with the correct polarity. The DA128 (tri-LC) and DA103(SC) only allow light to go through the center hole. Incorrect polarity will display as no light (veryhigh IL > 40 dB).

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