This problem is on both units.
Sutton Coldfield transmitter, 75-80% strength, 100% quality.
Frequency 48 includes channels such as Sony Crime (40) and Birmingham TV (7) and several others.
When I try to watch any of these live, the picture is perfect but the sound stutters every 3-4 seconds. However, if I record these channels, the recording plays back faultlessly. The same channels can be viewed live on my LG TV with no stuttering whatsoever.
I have manually retuned numerous times.
Any explanation, please?