Hello,
Was just wondering what the following means when doing a channel search on my Vu+ Uno.
So far, i think that........
dvb-S = Std tv channels
dvb-S2= hd tv channels
But what does
QPSK
8PSK
Auto
Mean that follows the dvb-s* during a channels search.
All the best
TTfn:)
G
read the manual for the UNO ---its at the back in glossary--explains everything !!!
DVB-S QPSK: Auto, 1/2, 2/3, 3/4, 5/6, 7/8
DVB-S2 QPSK : 1/2, 3/6, 2/3, 3/4, 4/5, 5/6, 8/9, 9/10
DVB-S2 8PSK : 3/5, 2/3, 3/4, 5/6, 8/9, 9/10
It can be either since it has to do with phase modulation and not the encoding itself, as in the way it is transmitted and not the way it is encoded.
FEC : FORWARD ERROR CORRECTION:the sender adds redundant data to its messages.This allows the reciever to detect and correct errors without the need to ask the sender to send more data...
8psk: is usually the highest order PSK constellation deployed.with more than 8 phases,the error rate becomes too high and there are better more complex modulations such as quadrature amplitude modulation (QAM)....
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