Extech Instruments 850 OWL Spécifications télécharger pdf (Page 26)

UNIT 3

APPENDICES

Appendix J - Reference jumper setup

Your test jumpers must be cleaned and inspected prior to using them for fiber link testing. You should have one jumper for the

power meter side of the test, and one jumper for each of the connector ports on your light source. Make sure that these patch

cords match the fiber under test (i.e. same fiber type, same core/cladding size, same connector type).

Use the following steps to set up your reference jumpers for link testing:

Step 1 - Connect the first jumper to the power meter and light source. Verify that it is working properly and not introducing

significant loss to the test. Disconnect this patch cord from the light source and meter and set it aside.

Step 2 - Connect the other patch cord(s) to the light source. If you have a dual wavelength light source with two connector ports,

then you will need to connect one jumper to each port.

Step 3 - MULTI-MODE ONLY. If you are testing multi-mode fibers, you will need to wrap each of the jumpers connected to the

light source around a ½”mandrel at least 5 times. This is done to achieve Equilibrium Mode Distribution (EMD), which eliminates

unwanted optical energy that can cause inaccurate test results.

Step 4 - Run the Link Wizard. You will be prompted to connect the patch cords during this process, once for each wavelength. See

Unit 3 for detailed instructions.

NOTE: Do NOT remove the patch cords from the light source until you have completed testing all of the fibers in the link.

Disconnecting the test jumper from the light source and re-connecting it will cause the Link Wizard reference to be incorrect,

thereby producing incorrect readings, and may cause a link to fail.

Single Mode

Reference

Multi-mode

Reference

UNIT 4

APPENDICES

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Extech Instruments 850 OWL Spécifications Page 26