Measure Menu; Begin Measurement; Begin Normalization - Agilent Technologies 86038B User Manual

Measure Menu

Begin Measurement

Begin Normalization

Agilent 86038B Photonic Dispersion and Loss Analyzer, Second Edition
Starts the measurement process as specified in the Setup menu.
A measurement progress indicator is shown at the bottom left of
the display. The indicator only appears during a measurement.
The estimates of measurement time given with the progress bar
are approximations and do not include all possible activities of
the instrument.
Accesses the Normalization Viewer panel. Normalization is used
to measure the loss and group delay of the instrument path.
Later this data is subtracted from the DUT measurement to
generate measurement results. Valid normalization data, as
indicated by a green icon at the bottom of the screen, is always
required before measurements including DGD/PDL.
Measurements of only GD/CD can be performed without valid
normalization, to allow quick evaluation of a device or the setup
parameters, but the results will not be fully calibrated. Existing
normalization data will be invalid for measurements, when
some setup parameters are changed, and then a new
normalization is required. Changes for which normalization
data become invalid include: increase of measurement range
beyond the normalization range, increment decrease by more
than a factor of two, TLS output power change, and modulation
frequency change. (Note that changing IFBW or increment
sometimes also changes the deliverable TLS output power,
which may invalidate the normalization data. This can be
avoided by slightly limiting the output power.) Changing the
mode of measurement between swept and stepped or adding
DGD/PDL will also invalidate the current normalization.
Phase Dynamic Accuracy
Enables normalization measurements to correct for amplitude-
to-phase conversion effects in the PDLA. Selecting this
correction causes an extra optical power-dependent calibration
to be made, which is used to correct the measurement results.
The extra calibration requires about 1 minute. If PDA data
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