EXFO FTB -5240S/5240BP Optical Spectrum Analyzer - Manual (Page 144)

Setting Up the Instrument in Drift Mode
138 FTB-5240S/S-P/BP
Building a Custom Drift Measurement
Building a Custom Drift Measurement
You can build a drift measurement using a WDM measurement you already
have as a reference. The selected channels and thresholds can be
imported from the analysis setup or the reference measurement.
A custom drift measurement is particularly useful for offline processing of
your data over time and comparing result variations.
The WDM measurements you add must meet specific criteria to be
included in the custom build. The table below describes those
compatibility criteria.
Note: Files that are not compatible will automatically be rejected from the custom
build measurement.
Criteria Test
Compatibility
Status
Acquisition type Target WDM measurement
acquisition type differs from drift
reference trace acquisition type
Compatible
with warnings
Acquisition number
of scans
Target WDM measurement
acquisition number of scans differs
from drift reference trace
acquisition number of scans.
Compatible
with warnings
Spectral range

Target WDM measurement
acquisition spectral range only
partially overlaps spectral range
of drift reference trace.

There is no overlap between
target WDM measurement
spectral range and drift
reference trace spectral range.

Compatible
with
warnings

Incompatible