Another point SagR bro,
I find that the signal level and Strength drops by few % say 20-30%, then its back to normal after a few hours. There is no specific time for this, and happns randomly in mornings, afternoon, evenings. But it gets back to normal
Example: Normal Signal levels for Say channel No 99
SS: 80%
SQ: 90%
Level: 225
It goes down to
SS: 75%
SQ: 75%
Level: 201