Sat Newbie: First results, and LNB question

rodscha

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Talking about dish wallahs,here is a link to a great prog (French tv)
made back in 1994 about India's TV scape.Very instructive!
 

astra19

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Very interesting video. I'll watch it this weekend.
 

NickPGSmith

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I am still playing with my multi-LNB setup trying to get it optimal. Of course I adjust one thing and everything else that is attached needs readjusting - it satisfies my need of constant fiddling. :-)

Now, I noticed DW English HD from Astra 1 is way down in strength, even when I point directly at it. Other channels come in at 100% (by whatever measure the TV is using) but DW is 0-10% and sometimes drops completely. I can't see why it would be such a struggle with the wide Europe beam:


Do others see this too or is it some peculiarity of my setup?
 

Mickha

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Just checked DW English HD, on 19.2E, 11778 V 29500 DVB-S2 QPSK 9/10 and getting a good signal, in the UK, it's also listed FTA on Hotbird, 13E, 11727 V 29900 DVB-S2 8PSK 3/4, though I haven't checked this transponder.
 

ozumo

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I have no lock on 11778V with an offset LNB on a dish pointing at 28.2east, appears to be one of the more difficult transponders, the FEC is 9/10 so needs around 11db to lock.
 

jeallen01

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I have no lock on 11778V with an offset LNB on a dish pointing at 28.2east, appears to be one of the more difficult transponders, the FEC is 9/10 so needs around 11db to lock.
My fixed dish for 19E isn't working, but that transponder shows a lot lower SS/SQ on the 1.25m Gibby than most of those for the other major channels here in W. London - so I think you are correct.
 

NickPGSmith

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Thanks for the info/confirmation. I managed to move to "30%" TV report, and stable, by adjusting the LNB skew a little to max the signal. We'll have to see how it holds up in heavy rain. I can only see a few of the strongest signals at 13E currently, until next month when the obscuring tree is removed.
 

Channel Hopper

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I am still playing with my multi-LNB setup trying to get it optimal. Of course I adjust one thing and everything else that is attached needs readjusting - it satisfies my need of constant fiddling. :-)

Now, I noticed DW English HD from Astra 1 is way down in strength, even when I point directly at it. Other channels come in at 100% (by whatever measure the TV is using) but DW is 0-10% and sometimes drops completely. I can't see why it would be such a struggle with the wide Europe beam:


Do others see this too or is it some peculiarity of my setup?
Lower yes, but not by much. You might have an issue with cable or connectors.
 

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NickPGSmith

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I have no lock on 11778V with an offset LNB on a dish pointing at 28.2east, appears to be one of the more difficult transponders, the FEC is 9/10 so needs around 11db to lock.

Thanks for the pointer to consider the the encoding scheme and FEC, not just received power - I wasn't previously aware there were so many different variations possible with DVB-S2.
 

NickPGSmith

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Lower yes, but not by much. You might have an issue with cable or connectors.

I found some other channels that provided stable viewing but actually had a fairly low reported quality. The trouble is I have no idea what the "%" the TV is reporting is actually measuring. I have had channels start to drop out at 50%, others drop out at 10%. And the signal "strength" is almost always 100% so is completely useless.

At the risk of opening another can of worms for myself, what are you using to get those quantitative graphs?

> There is a very fine line between "hobby" and "mental illness"

I concur :-)
 

ozumo

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I found some other channels that provided stable viewing but actually had a fairly low reported quality. The trouble is I have no idea what the "%" the TV is reporting is actually measuring. I have had channels start to drop out at 50%, others drop out at 10%. And the signal "strength" is almost always 100% so is completely useless.
The channels that drop out at a higher signal quality percentage are most likely to be those that require a higher db for lock:

A09307F4-FBC5-4737-BD89-CDA5AE5214F7.jpeg
98E5FEAF-F0BB-4B52-B330-3EA464BE6224.jpeg
 
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