Wavecom W40PC, Manual

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Advanced Topics WAVECOM Decoders v6.15 W40PC, W41PC, W51PC
indicate the fact that the system is transmitting data (TRAFFIC).
One should then wait for an IDLE state or for some request (RQ)
cycles for closer examination.
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the graphic display only shows approximate wave forms. This
peculiarity is often evident in the case of simplex systems but an
approximate determination is however still possible.
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in the case of a horizontal line without any peaks or deviations, no
periodicity may be deduced or the period is much larger than the
total number of sampled data bits.
Each mode and each signal can produce very different displays. Often it is possible to
determine a periodicity with the zoom function (Enlargement).
By right-clicking on the display a menu appears. By selecting " Zoom In " the mouse cursor
changes its shape. By clicking and dragging a field can be enlarged or reduced horizontal and
vertical. The field should be sized in such a way that the peaks fill out the zoom field
optimally. After the zoom field has been sized, release the mouse button. An enlarged section
of the autocorrelation track is displayed.
The determination of the different subsequent peaks gives the periodicity. With the function
"
Zoom 100% " the full screen display is displayed again.
Several color schemes are available also through the right-click menu.