Dvb-T/T2 /Dvb-C Constellation - Telestar SATPLUS 4 Operating Instructions Manual

7. DVB-T/T2 - DVB-C MEASURING RANGE

7.3 DVB-T/T2 /DVB-C constellation

The constellation diagram is used to display the modulation type.
In the ideal case - interference-free transmission - the data is recognized perfectly and appears in
the constellation diagram as clearly defined points, each exactly in the middle of the
corresponding quadrant.
However, interference in the transmission channel often means that the receiver cannot correctly interpret
some of the data in the received signal. Therefore, the points do not appear exactly in the theoretical
center of the grid, but a larger scattering of the points becomes visible in the constellation diagram.
EN
The display on the screen is adapted for each modulation type. For example, a DVB-C 16QAM signal is
displayed on the screen with a total of 16 quadrants, a DVB-C 64 QAM signal with a total of 64 quadrants.
> Press the green button (TVR) during the measurement
You can select the stored transponders using the navigation buttons on the right/left.
Operating
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