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USER'S MANUAL. TV EXPLORER HD +
Figure 49.- Constellation Diagram. DVB-S (QPSK) signal.
When selecting a constellation diagram for DVB-S2 signals, on screen will appear
the following information:
Figure 50.- Constellation Diagram. DVB-S2 (8PSK) signal.
The transmission quality is visualised in a qualitative way using a colour range for
the symbol density concentrated in a certain area. This colour coding goes from
black (no symbols) to red (maximum density), and runs from blue to yellow in
ascending order.
A greater dispersion of the symbols indicates greater level of noise or worse signal
quality.
If concentration of symbols or noise appears is indicative of good carrier/noise ratio
or absence of problems as phase noise, etc.,.
12/2011
NOTE
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