wallycharlo
Regular Member
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- Nov 15, 2004
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- My Satellite Setup
- DM800 / 1m Gibertini XP
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- Western Austria
Excuse my ignorance .. But, does this confirm that 2f is banjaxed ?
BlindFaith said:True FEC also called code rate is the inner coding (convolutional). But there's more redundancy. The outer coding (Reed Solomon) uses 204 byte for each 188 byte ts_packet.
A DVB-S symbol rate of 22MS/s and FEC of 5/6 resulting in a brutto bit rate of 22*2=44Mbit/s with a net bit rate of 44*(188/204)*(5/6)=33,79 Mbit/s
Almost no difference. DVB-S2 8PSK 2/3 = 6.6dB SNR threshold, DVB-S QPSK 5/6 = 6.5dB threshold, according to Lyngsat. Before the BBC changed parameters on the BBC HD transponder that was DVB-S2 QPSK 8/9 = 6.2dB threshold. 10936V is also using this configuration.davidcmadrid said:Sorry if I missed this but does anybody have an opinion as to why 11023h is the apparently more problematic transmission in border line setups? Is it something to do with fec?
Thanks. I got confused. Was thinking is was a ratio, not a vulgar fraction.satelliteman said:1/2 FEC means half the data is error correction. A higher FEC of 7/8 means 1/8 of data is error correction.
But in reality some receivers do seem more fussy. Could some tuners just be more sensitive to DVB-S or QPSK?Huevos said:Almost no difference. DVB-S2 8PSK 2/3 = 6.6dB SNR threshold, DVB-S QPSK 5/6 = 6.5dB threshold, according to Lyngsat. Before the BBC changed parameters on the BBC HD transponder that was DVB-S2 QPSK 8/9 = 6.2dB threshold. 10936V is also using this configuration.
Maybe, but that would be a fault with the receiver, not a feature of the modulation. But anyway some transponders just are stronger than others irrespective of modulation. For example from 1N I receive 10891H at 13.6 dB, and 10936V at 15.7dB. That is probably about a 50% difference in dish size (70cm to 1m).timo_w2s said:But in reality some receivers do seem more fussy. Could some tuners just be more sensitive to DVB-S or QPSK?
Yes true, I've noticed that some transponders come in stronger than others and it's probably the case here too. Wouldn't it have been nice if they could light up new satellites for a few days with equal test transmissions on all transponders so we could all check levels...Huevos said:Maybe, but that would be a fault with the receiver, not a feature of the modulation. But anyway some transponders just are stronger than others irrespective of modulation. For example from 1N I receive 10891H at 13.6 dB, and 10936V at 15.7dB. That is probably about a 50% difference in dish size (70cm to 1m).
Take your point. Tomorrow I shall finish harvesting my olives, then it may be worthwhile changing my current LNB for a black Inverto I have in the garage. Its still in its box and may help. Might bring my 5 cluster back. Or maybe not.joddle said:But is that surprising? - if the skew is set properly for 28.2E then it makes sense that changing it will worsen the signals - if you say the set up was good then the 5 cluster is not weaker because the skew is wrong but because the signal is not as good - or have I missed the point? SQ is very dependent on the correct skew
Don't SES Astra/SKY advise what their plans are? If not why not? What is the big deal?M60 said:At least that puts speculation to bed, guess the 2A or 2B transition to 2F will now take place after Christmas. I assume 2G will eventually cover all of Bands C and D too so as to offer full redundancy to 2E and 2F. I presume therefore 2D is still hanging around as a current backup to 1N (and later next year 2E's) Band D TP's, with it not in use and housekeeping kept to a minimum it will save the craft fuel.
Thanks for that. Why is the Roi OK but not other EU States such as Spain then? Roi is not part of the UK either!Tivù said:Why? BSkyB and the UK PSBs exist to Broadcast to an intended audience in the UK. Any Transponder or Satellite moves have no effect on the intended audience.
The fact that there has been (and still will be) overspill is a bonus for those outside the UK and BSkyB and the UK PSBs are not in a position to condone that by effectively acknowledging and advertising the fact - although in BSkyB's case it is certainly true that they welcome Revenue from any source and only seem to clamp down on improper usage when obliged to do so (Retransmission systems; Card sharing; Non-UK "Agencies" etc.)
As for the big deal ................. part of it is the amount paid for (and the conditions attached to) Programme Rights. Part of it is the terms of their own Broadcasting Licenses. There are many factors, including Commercial, Legal, Copyright etc.
You hit upon part of the answer yourself in mentioning Cards issued to a UK address. There is no mechanism or mandate for Cards to be properly issued to anywhere other than a UK (or RoI) address.