Our signal on the BBC PSB1 mux is erratic and I'm not sure why. Some of the time it's OK at about 70% strength, other times it disappears to 'No signal'. However, all other muxes are fine, usually with 100% signal.
We're high up in the Cotswolds near Stroud, and have good line of sight to the Mendiptransmitter. It's 40 miles away, but we're 600' ASL and the ground drops away sharply to the south, so there's no obvious problem, and Megalithia shows the signal path is good. Were in a rural area, so interference is unlikely.
Our aerial is on the same alignment as our neighbours, but is bigger (about 15 elements). It dates from analogue days when it was fine, and I dont think Mendip changed frequencies in the switchover.
Ive just left the digibox on manual search for a few minutes. On channel 61 (BBC PSB1 mux from Mendip) it shows a Signal Quality: Good, Signal Level mostly about 70%, but briefly dipping down to None a few times a minute. However, last night we tried to watch a BBC programme, which was OK for 45 minutes (but with very brief interruptions to sound), and then disappeared for the last 15 minutes. Channel 54 is currently showing Signal Quality: Very Good, Signal Level rock solid on 100%.
All of which leaves me very confused what problem can give an intermittent fault on one channel and leave the others unaffected. Does the larger aerial mean I should try an attenuator? Any help appreciated.
Monday 3 December 2012 5:04PM
Our signal on the BBC PSB1 mux is erratic and I'm not sure why. Some of the time it's OK at about 70% strength, other times it disappears to 'No signal'. However, all other muxes are fine, usually with 100% signal.
We're high up in the Cotswolds near Stroud, and have good line of sight to the Mendip transmitter. It's 40 miles away, but we're 600' ASL and the ground drops away sharply to the south, so there's no obvious problem, and Megalithia shows the signal path is good. Were in a rural area, so interference is unlikely.
Our aerial is on the same alignment as our neighbours, but is bigger (about 15 elements). It dates from analogue days when it was fine, and I dont think Mendip changed frequencies in the switchover.
Ive just left the digibox on manual search for a few minutes. On channel 61 (BBC PSB1 mux from Mendip) it shows a Signal Quality: Good, Signal Level mostly about 70%, but briefly dipping down to None a few times a minute. However, last night we tried to watch a BBC programme, which was OK for 45 minutes (but with very brief interruptions to sound), and then disappeared for the last 15 minutes. Channel 54 is currently showing Signal Quality: Very Good, Signal Level rock solid on 100%.
All of which leaves me very confused what problem can give an intermittent fault on one channel and leave the others unaffected. Does the larger aerial mean I should try an attenuator? Any help appreciated.