Testing a Short DUT

www.jgroptics.com

Testing a Short DUT
This document will detail how to measure RL for a short DUT of length < 1.7m with the MS12001
system.
To accurately measure RL, the reflection from the second connector must be blocked. This isdone by terminating the connector by using one of the following:- mandrel wrap
- index matching block- index matching gel
In the example shown, a 1m long FC/UPC – FC/UPC jumper will be tested for both SM and MM.

www.jgroptics.com

Testing a Short DUT
Go to Config > Connector to configure your connector pass/fail limits.

www.jgroptics.com

Testing a Short DUT
Configure your DUT.
Be sure to turn off “Mandrel Free”.

www.jgroptics.com

Testing a Short DUT
Setup a bidirectional test using the created DUT and desired parameters.

www.jgroptics.com

Testing a Short DUT
Connect your MTJ from the MS12 output to the detector.
DA101(FC DetectorAdapter)

FC/UPC – FC/UPC(short DUT)

Mandrelwww.jgroptics.com

FC/APC – FC/UPC(MTJ)Testing a Short DUT
Select Reference Acquisition and click Start Single.

www.jgroptics.com

Testing a Short DUT
Connect the DUT and click Start Single.
The software will pause to allow the operator to terminate the connector.

www.jgroptics.com

Testing a Short DUT
For SM, the preferred method is to mandrel wrap. If this is not possible, index matching thesecond connector (see MM case) is acceptable.
Click OK on the dialog box to measure RL of the first connector.

www.jgroptics.com

Testing a Short DUT
The software will pause a second time to allow the operator to unwrap the DUT and insert it intothe detector adapter.

www.jgroptics.com

Testing a Short DUT
If the connector came into contact with an index matching block or gel, be sure to clean andinspect it before measuring.
Click OK on the dialog box to measure IL of the first connector.

www.jgroptics.com

Testing a Short DUT
Flip the DUT and repeat to measure the second connector.
Once complete, enter a serial number and click Next DUT to save the results.

www.jgroptics.com

Testing a Short DUT
The same principle applies for MM with a few small differences.
Configure the connectors.

www.jgroptics.com

Testing a Short DUT
Configure the DUT with “Mandrel Free” off.

www.jgroptics.com

Testing a Short DUT
Setup a bidirectional test with the DUT and desired parameters.

www.jgroptics.com

Testing a Short DUT
Connect the MTJ to the MS12 output and leave the PC connector open to air.
DA101
(FC DetectorAdapter)

Index matching block

FC/UPC – FC/UPC(Short DUT)

www.jgroptics.com

UPC or PC connector
Open to air

FC/UPC – FC/UPC(MTJ)Testing a Short DUT
Select Reference Acquisition and click Start Single. This will initiate the first part of the reference
for length and RL calibration.

www.jgroptics.com

Testing a Short DUT
Insert the MTJ into the detector and click Start Single to initiate the second part of the referencefor IL.

www.jgroptics.com

Testing a Short DUT
Connect the DUT and click Start Single. The software will pause to allow the operator toterminate the second connector.

www.jgroptics.com

Testing a Short DUT
Place the second connector in the index matching block or gel. Click OK.
Note: mandrel wrapping does not work for MM.

www.jgroptics.com

Testing a Short DUT
After the RL acquisition, the software will pause again.

www.jgroptics.com

Testing a Short DUT
Clean and inspect the connector.

Xwww.jgroptics.com✓

Testing a Short DUT
Insert it into the detector. Click OK to complete the IL measurement.

www.jgroptics.com

Testing a Short DUT
Flip the DUT and repeat to measure the second connector.
Once complete, enter a serial number and click Next DUT to save the results.

www.jgroptics.com