ET10000 - 30000 8PSK Problem

Hello!

I have on Eutelsat 16E Problem with Vipnet Frenquecies.

11637 H 30000 5/6.

It lasts up to 30 seconds i get signal on this frequency and other 30000 8PSK. Wenn I got the signal, then it works without failure. constant 82%
But it lasts so long I get the signal.

With dm800se I hadn't this problem.

Where is the problem? Is there a fix or something I can do?

Thanks!