Tektronix OM4006D, User Manual

Page: 89 / 205

Taking measurements
EqFiltInUse – a string which contains the properties of the equalization fi lter
in use
pHybInUse – a string which contains the properties of the optical calibration
in use
DebugSave – logical variable that controls saving of detailed .mat fi les for
analysis:
DebugSave = 1 in the MATLAB Engine Command window results in two
fi les saved per block plus one fi nal save.
DebugSave = 0 or empty suppresses .mat fi le saves.
Taking measurements
Click Single and observe that the oscilloscope takes a burst of data; this con fi rms
the connection. Use a short record length (for example, 2000 points) to speed up
the display, click on Run-Stop to show continuously-updated measurements.
Using the Home tab, set up the plots you want, either using the stored Layout
button or by clicking on the particular display format icon in the Plot Tools bar.
Displays can be rearranged within the UI window or dragged and positioned
randomly on the Windows Desktop. Clicking and dragging a window using
its title tab brings up a positioning guide. Hold down the left mouse button to
position the window onto the positioning guide, then release to organize the plots.
Constellation and Eye plots can be rescaled by clicking on the relevant scaling
icons in the Controls tab of the left panel of the UI. The scale in
√ W/div is
indicated.
Options for each plot are accessed by right-clicking on the plot. Trace and symbol
contrast can be set globally using the sliders on the left bar of the OUI. Set trace
and symbol properties for a particular plot using the right-click on the plot.
OM4000D Series Coherent Lightwave Signal Analyzer 65