Reference Scans Tab Page - JDS Uniphase SWS15100 User Manual

Reference Scans Tab Page

The Reference Scans tab page (Figure 67) is used to control the acquisition of references.
The Reference Scans tab page contains the Reference Table, the Dark Voltage measurement
check box, the Prompt Every Channel check box, and the Zero Loss Measurement check box.
Each of six rows in the Reference Table represents a reference measurement for Dark Voltage
and Zero Loss for polarization states S0 to S4. The columns are for the channels. The value in
each white cell is the time-stamp at which the measurement took place. To display the absolute
power in dBm for the channel belonging to that column, move the mouse over a Dark Voltage or
Zero Loss cell in any column.
Performing Dark Voltage Measurement
To perform a dark voltage measurement:
1. Ensure that all required channels are listed in the Selected column.
2. Turn on the dark voltage measurement by checking the Dark Voltage check box.
3. Check the Prompt Every Channel check box to do the dark voltage measurement individually
for all channels. This check box applies only to the dark voltage measurement; therefore, it is
disabled if the Dark Voltage check box is not checked. If Prompt Every Channel is checked,
the dark voltage measurements are taken for one channel for each scan. Otherwise, the
dark voltage is measured for all selected channels in one scan. This prompt is used when
performing both dark voltage and zero loss measurements at the same time.
4. To measure only dark voltage for a number of channels, do not check this box.
5. Press the Start Reference button. The program prompts the user to put a detector cap on
each channel on the receiver for the dark voltage measurements.
6. Use the detector caps supplied with the receiver to cap the detectors and then click OK. A
dark voltage measurement is taken and the results are stored and used for all subsequent
power measurements.
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Figure 67: Reference Scans Tab Page
Operating and Maintenance Instructions – 77