Chapter 1
Optical Spectrum Measurement
Drift measurement
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MTS / T-BERD 5800 • COSA-4055 • User Manual 2016.01
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:
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 blue field of the table.
Wavelen.
Level
Description
Channel
Channel
Number of the displayed channel.
Wavelen. (nm)
Wavelen. (nm)
Wavelength or Frequency of the displayed
channel.
L Ref (nm)
Level (dBm)
Reference value of wavelength or power.
L Avg (nm)
P Avg (dBm)
Average value of wavelength or power.
L Min (nm)
P Min (dBm)
Minimum of wavelength or power.
L Max (nm)
P Max (dBm)
Maximum of wavelength or power.
Sdev L (nm) or
Delta
Sdev P (dBm) or
Delta
Standard deviation or delta (min/max) of
wavelength or power.
NOTE
If the channel power drifts to a power level below the channel
detection threshold, the measurement will indicate “No Signal” in the
bar above the table.
Summary of Contents for BN 2301/01
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