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Figure 43.-
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 yelllow 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.,.
5.15.3 DVB-S/S2 (QPSK/8PSK) signal
UTILITIES
Go to the
CONSTELLATION
option.
The modulation type:
Next, the frequency and channel number correspoding to the channel plan selected as
well as the satellite downlink frequency. Finally, it shows the status line (similar to the
measurement screen).
Page 66
USER'S MANUAL.
DVB-C
Constellation diagram.
menu by pressing the
DVB-S
QPSK
DVB-S2
(
) or
TV EXPLORER HD / HD
QAM 256
(
) signal.
[22] key, and then select the
8PSK
(
) is showed on screen.
LE
NOTE
10/2012
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