Lochpark road Hawick TD9 9HZ. I am a retired electronics engineer with experience in large tv distribution systems in 2 hospitals and many home instalations both analogue and digital but have not had this problem before .... which happens to be my own home !
The aerial is outside and what would seem correctly aligned on Selkirk, it had a mast head amp with 3 way splitter at ground level which was very rusty inside so I replaced it as high as I could and fed the downlead to a D/A under the floor at the same time replacing old coax cables. The problem seems to affect the HD channels more than the standard channels and also a few of the minority channels, the field strength is excellent and stable while the bit error rate is mostly good but does dip and dive a lot and at times it dips off the lower end of the scale momentarily at which point you get the "no signal" on the tv , I still have my Horizon field strength meter from my working days and this confirms the indication viewed on the on screen tv display, I have tried the usual stuff like attenuation to avoid too high a signal strength but the problem is the same. This is a first for me to have a good field strength but a BER which is very unstable. Do you think this could be some sort of interference signal or is it likely to be the aerial itself ? or some other, though I understand that neighbors dont have the problem . I would be interested to hear any comments from the experts, thank you
Saturday 6 August 2022 1:46PM
Hawick
Lochpark road Hawick TD9 9HZ. I am a retired electronics engineer with experience in large tv distribution systems in 2 hospitals and many home instalations both analogue and digital but have not had this problem before .... which happens to be my own home !
The aerial is outside and what would seem correctly aligned on Selkirk, it had a mast head amp with 3 way splitter at ground level which was very rusty inside so I replaced it as high as I could and fed the downlead to a D/A under the floor at the same time replacing old coax cables. The problem seems to affect the HD channels more than the standard channels and also a few of the minority channels, the field strength is excellent and stable while the bit error rate is mostly good but does dip and dive a lot and at times it dips off the lower end of the scale momentarily at which point you get the "no signal" on the tv , I still have my Horizon field strength meter from my working days and this confirms the indication viewed on the on screen tv display, I have tried the usual stuff like attenuation to avoid too high a signal strength but the problem is the same. This is a first for me to have a good field strength but a BER which is very unstable. Do you think this could be some sort of interference signal or is it likely to be the aerial itself ? or some other, though I understand that neighbors dont have the problem . I would be interested to hear any comments from the experts, thank you