Testing The System; Testing System Noise - JDS Uniphase SWS15100 User Manual

2-output cassette
4-output cassette
5. Test the remaining output ports.
If the unit does not appear to be functioning properly:
1. Clean the connectors of the Output port on the front of the source optics module. Test the
output ports again. If this fails, proceed to Step 2.
2. Remove the output port plate from the source optics module, disconnect the FC/PC
connector from the back of the plate, and measure the power directly from this FC/PC
connector cable. The power measured is ideally at >-8 dBm. If the power is correct, reinstall
the output cassette and test the output ports again.
3. If the problem persists, call JDS Uniphase.

Testing the System

Prior to any functional testing of the SWS hardware, verify that the optical connections and
components are correct. To verify connections:
1. Set the tunable laser source to manual mode, ensuring that the Remote key on the front
panel is not lit. The Remote key toggles on and off when it is pressed. If the key does not
toggle, press the Stop button on the source optics module, then the Execute button on the
source optics module.
2. Set the tunable laser source to 3 dBm.
3. Connect a power meter to the To Device port on the front of the receiver by using a jumper.
4. Verify that the power reading on the power meter is >-15 dBm. If it is not, clean all fiber
connections, ensure that all connectors are tight, and redo the test. If the condition persists,
contact JDS Uniphase.
When component testing is complete, the assembled SWS can be tested to ensure that
parameters (for example, IL, minimum and maximum power, bandwidth, or center wavelength)
are measured correctly. Two simple tests that can be performed are:
•
Referencing and verifying minimum noise
•
Checking the wavelength accuracy of the SWS

Testing System Noise

To reference and verify minimum noise:
1. Select a channel and perform a zero-loss reference in the insertion loss mode.
2. Acquire a trace with the same jumper and channel that was referenced in step one. The
scan will be automatically displayed on the chart area of the SWS software.
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>-11.5 dBm
>-15 dBm
Getting Started – 53