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Chapter 8 Optical Spectrum Measurement
Drift measurement
Figure 148
Example of drift measurement, wavelength over time
In the Drift display the measurement result is shown in a graphical format (trace over
time / scans) and a tabular format. The table shows the following parameters:
Channel number
Wavelength or Frequency of the displayed channel
Ref
AVG
Min
Max
Sdev or Delta
All Zoom and Shift functions are available in Drift mode.
By using the cursor A it is possible to get access to each measured data point. The Start
value as well as the actual cursor position including the time information is shown in the
grey field of the table.
NOTE
If the channel power drifts to a power level below the channel detection
threshold the measurement will indicate "No Signal"
278
number of the displayed channel
reference value of wavelength, power or SNR
average value of wavelength, power or SNR
Minimum of wavelength, power or SNR
Maximum of wavelength, power or SNR
standard deviation or delta (Min/ max) of wavelength, power or
SNR
User Manual
78000010220 Rev. 024
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