Signa strenght causing no fluent video?

[Benarty]

I'm testing a Zotac Atom 330 ION based system with a mediapointer DVB-S2 card.

 

On the old vdr, signal strength was usual around 70-90% but now with this mediaôinter, always 100%

But tsrangely, the video is not fluent grequent small interruptions and DVBViewer reports no disconueties.

 

I have to say, the dish is too bij large for high power satellites (1.2m) and is it possible that the signal amplitude is too high so that the DVB-S2 card can show not stable video?

 

It is sure not the atom, CPU use at SD materialfloating around 10% when using overlay, VMR modes needs more cpu time so I stick with overlay mode.

 

Another strange thing:

 

My old VDR could not find serveral channels, a blind scan revealed that the scannels where found on other frequencies.

 

This mediapointer finds these missing channels als not. Since two different dvb cards are not capable to find these channels , should I assume that the LNB has a problem?

 

ps. The mediapointer finds channels, just not the correct ones, problem traponder is located at 12515Mhz.

btw: DVBViewer was nnot able to tune, transedit could do it, but did find the wrong channels on that transponder.

 

 

Conclusion:

 

Dish too big?

LNB problem or mediapointer problem?

[Mr Jolly]

I do not think your dish is too large. You will need something like Jodrell Bank to overload the LNB.

 

If you have two cards not able to tune then it does sound like a faulty LNB.

[Derrick]

should I assume that the LNB has a problem?

 

..most probably

[Mr Jolly]

LNBs do fail because they are sensitive electronics and they have to sit outside. If the connection of the cable to the LNB is not good, then water will get in sooner or later and that is the death knell of GHz signals. It is also possible that water has got into the end of

the cable so snipping a metre off and redoing the plug is worth a try. I would say, over the years since the late 1980s, whenever trouble, 50% of the time it has been LNB, and 50% cable. It has never been the receiver. Oh, and the dish can so easily go off. A signal meter is essential if you are doing your own stuff. A 1.2 meter dish has a very narrow angle of vision and it only needs the slightest nudge to put it off. With digital, there is no gradual reduction in picture quality as the signal to noise gets worse. Within less than 1 dB of S/N the stable image will pixelate and then disappear.

[Benarty]

I tested yesterday with a nokia mediamaster 9500 sat receiver directly connected to the LNB and same faults, not able to find alle transponders and choppy video.

The nokia has a less sensitive tuner tho but 3 different DVB devices have the same problem so indeed the LNB.

 

 

Thanks to point to the right solution.

Jodrell Bank : LOL