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Last Update: Apr 25, 2024
Signal Analysis - Constellation Plot
Web UI Icon
Supported Devices
Broadcast Standards
ATSC 1.0, ATSC 3.0, ISDB-T/Tb, DAB/DAB+, DTMB, DVB-S/S2
Availble Tools
None
Screenshot
Figure 1 - QAM Constellation
Figure 2 - ATSC 1.0 Level Diagram
Description
A constellation plot (or diagram) is one of the most widely used means of presenting a signal modulated by a digital scheme - Quadrature Amplitude Modulation (Figure 1), Phase-shift keying, Amplitude-shift keying (Figure 2), etc.
If a signal has a framing structure with each part modulated with different Constellations (Modulation orders), for example, as in ATSC 3.0, the Receiver plots Constellations for all parts of the signal.