DM 800 se - Transponder image fail

[Marine]

DM 800 se - Transponder picture fail

In the 5 channels of one transponder i have this big problem:

the rest channells have no problems.

¿any idea?

 

[Ferret]

Can you gives us the channel name and frequency and ill check it out on mine.

Thats bad breakup that, does not look signal related but for interest take a look at the signal meter is the signal strength going up and down like mad ?