Satellite tv problem?

All channels received through a specific transponder appear pixelated?


I'd like to know why,and if there is something i can do to rectify this issue?

Thx
Update: It's also affected by the time of day seemingly as the evening passes, the issue is far less noticeable, then after dawn the cycle repeats itself ,also other channels from the same satellite but on a different transponder have no issues
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