Restoring Factory Calibration Values - JDS Uniphase SWS15100 User Manual

10. Type the second laser source wavelength in the Wavelength field (for example, 1550 nm).
11. Click the Acquire Voltage button. The average voltage of the selected channel is measured
and the voltage is displayed in the Voltage field.
12. Type the input power shown on the power meter in the Input Power field.
13. Click the > button beside the Acquire Voltage button. The results are shown in the Input
Power and Avg. Volt columns.
14. Increase the level of attenuation on the attenuator by 5 dB, click the Acquire Voltage button,
type in the Input Power, and click the > button.
15. Repeat Steps 11 to 14 until enough voltages for a linear plot (a minimum of four values is
recommended) have been acquired by increasing the attenuation, clicking the Acquire
Voltage button, inputting the Input Power, and clicking the > button. The Acquire Dark Voltage
button becomes active during the process.
16. Delete any Input Power and Avg. Volt reading by clicking the left arrow button beside the Input
Power column.
17. Click the Acquire Dark Voltage button. Dark voltage is the residual power left in the system
when there is no light going through the system. A message is displayed asking the user to
cap the detector or terminate the fiber. To do this, for example, on the HA9 attenuator, press
the ∞ key. Alternately, put the cap on the detector module on the receiver. The dark voltage is
displayed in the Dark Voltage field.
18. Click the Calibrate button. There is a prompt to save old data to the computer before writing
over the data or write over the data without saving the old data. The calibration information is
saved.
19. Repeat the process for each channel. Calibrated channels appear in the Calibrated
Channels list. Click the First button to redo all measurements or the Selected button to redo
measurements for selected channels only. Activate the HA9 attenuator again by pressing the
∞ key.
20. When the testing is finished, disconnect the HA9 attenuator, wave meter, and power meter.

Restoring Factory Calibration Values

Factory power and wavelength settings can be restored using the SWS software. Reset is done,
for example, when the user has difficulty performing a wavelength calibration because the lines
are difficult to identify, or if the internal acetylene cell is too far from the receiver and no external
acetylene or HCN cell is available to do the wavelength calibration. Factory power calibration can
be restored if the equipment required to do power calibration is not available, and the unit was
calibrated at the factory less than a year earlier.
To restore the factory power calibration:
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Operating and Maintenance Instructions – 117