Nautel NV30LT-N, Operation & Maintenance Manual

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NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER
VERSION 0.1 2015-03-01 PAGE 3.2.41
Figure 3.2.28: Lissajous Plots
Lissajous Plot
See Figure 3.2.28 . This panel displays a Lissajous plot that represents either left and right audio content
or a representation of the FM modulated signal (I and Q). I and Q will be automatically selected when
using MPX as the main audio source. Left and right audio content is displayed for all other audio
sources.
The plot consists of a group of sequential samples to allow signal analysis. In L and R mode, the L+R
portion of the signal tends to dominate the plot, resulting in the majority of samples appearing in the
lower, left and upper, right quadrants. In I and Q mode, signals that are of equal frequency and
90 degrees out-of-phase result in a circular display.
Use the up or down button to maximize (if it was minimized) or minimize (if it was maximized) the
panel size.
L and R mode
I and Q mode