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tim Tuesday 15 January 2013 11:44PM
I am trying to work out whether my signal problems are simply that I dont have good enough signal or whether it is interference. I live in GU52, so only received any freeview channels as switch over neared completion.
We have tried various things, including realigning the ariel. The signal does not arrive with enough strength for one device, I do not have a splitter on it or anything else.
On a bad day I get PBS1, Com 4 and com 5. I get PBS2 on a good day.
What I am trying to get is an explanation (if it isnt interference) as to why most of the time PBS2 is unwatchable (usually that is good, much of the time it simply says no signal), but from time to time I will turn it on and it will work perfectly. Yet PBS1 which is meant to go out from Hannington at the same strength, is always great quality signal. By the same reasoning, why do I almost always get com5, but com4 only occasionally and com6 not at all, when again these are all at the same strength.
I would be grateful for anyone explaining this for me. thanks
tim: I am wondering if this could be an issue with quality rather than strength.
I see that there are quite a few trees in your area in the direction of Hannington. This could explain the signal coming and going, seemingly at random intervals.
Also, when signals hit objects different frequencies get affected (refracted, attenuated, reflected etc) to differing degrees which often explains why different channels are received differently where they are being broadcast from the same transmitting station at the same power. This was easiest to see in the days of analogue. If you ever used a set-top aerial to receive analogue you will know that sometimes it was tricky to find a spot where all channels could be picked up sufficiently.
I just bought a pair of Zyxel Powerline adapters to supply internet to my new Philips Smart TV, which is nearly out of range of my WiFi. A range extender and +7dB aerials on the router helped but not a lot. The morning after installing these, which worked just fine, I turned on my iMac with a Terratec T2 DVB-T receiver to listen to radio 3 and the interference was awful - totally not listenable to. One day later (today), one of the Zyxel units failed and I have returned them to the supplier for replacement. However, this evening, Freeview reception of BBC R3 is back to normal. QED. I think I may ask for my money back instead of a replacement.
Wilson Laidlaw: Mains cables are not meant for passing signals over because they are not screened. There is also no filter to ensure that the noise these wretched things generate doesn't get into appliances.
Your house wiring becomes an antenna to distribute the signal far and wide (its effectiveness depending on how well it happens to be designed for the frequencies concerned).
Consider re-siting your wifi router or running cat 5 cable between rooms. Flat cat 5 leads are available to put under carpets if there is really no other way or you can buy cable protector such as in this example:
Hi I'm hoping you can help we recently bought a tv for our bedroom which we have plugged straight into an aerial socket but when we turn it on the tv downstairs goes all distorted until you turn the upstairs one off, why does this happen ? My sons tv in his bedroom works fine with a portable aerial and doesn't interfere with other tv's
Norman Cherrie Monday 4 March 2013 4:44PM Cirencester
For the past two months, in the evening after dark, my tv picture goes off then comes on again. Sometimes it is off for long periods and sometimes just for a few minutes.
Initially only ITV was affected but now it is both ITV and BBC. I have a good quality modern roof arial although one leaf on the horizontal bar is bent back towards the reflector. I receive ITV West and BBC West.
I should be grateful for any help.
The signal strength screen on BBC One should say that you are tuned to C61 for Mendip and not C23 which is Cirencester. For ITV, Mendip is on C54 and Cirencester is on C29.
By the way, on 27th March there is a retune for Mendip when BBC will move from C61 to C49.
If either is tuned to Cirencester, then having the aerial unplugged for the first 30% of the scan (or until past C30 if it gives channel numbers during the scan) should miss out scanning of Cirencester channels.
Norman Cherrie Wednesday 6 March 2013 8:53AM Cirencester
To Dave Lindsey
Thanks to your advice; problem solved. As you suggested might be the case, BBC and ITV were tuned into the Cirencesterrelay although my roof aerial points towards Mendip. I retuned BBC and ITV to Mendip C61 and C54 and the reception is now OK.
When I retune on 27 March I will take your advice and leave the aerial unplugged for the first 30%.Many thanks again.
My post code is YO19 5PY
I have a Panasonic TX-L32E5B Television, which we bought just before Christmas, and a Humax box.
I have just had a new aerial fitted, with good qualitycable, as we hoped this would cure our problem - only it hasn't.
If we switch the TV to any of the HD channels there are no problems. If we switch it to any of the non-HD channels (i.e. to watch the local BBC channel) it keeps losing the signal for several seconds. However if we switch the TV to get its signal from the Humax, instead of direct from the aerial, there are no problems. Can anyone suggest either a cause or a solution?
Hi all - I live in Dorset and receive from Rowridge. I have put in my postcode (BH21) to identify any problems and apparently there are none reported. However, on looking at the map given on this site, Rowridge is undergoing repairs amd maintenance. It would be nice to know when these repairs will be completed as I had a good picture until about a month ago. My BT Vision service seems to be OK (though this occasionally disappears altogether and the other set in my home (on a different floor) still produces a pretty unwatchable picture at times - usually around lunch time daily). There is an attenuator fitted on my main television and I had a new outside aerial fitted last summer which is showing a good signal.
since work has been done on winterhill transmitter on10/4/2013 have problems with bbc freezing and breaking up also cant get shy news. Have retuned several times but to no avail, FY8 3ET
Thanking you in anticipation Jackie
I have an LG TV with built in freeview and also a Humax box. Since the winter hill retune I am having problems with reception. The signal strength is ok 82% the problem is the 100% quality signal. This can vary down to as low as 10% intermittently causing pixalation and loss of picture. I don't know what the cause is except possibly a 4g mast but don't know where these are located. I have read where filters are available to prevent interferience from 4g masts where can I get one.
Bob: With reference to your query, are the problems referred to mainly concerning the reception of the BBC channels and possibly the mux transmitter used by such as Pick TV / Sky news etc? the reason for asking being that quite a number have complained about reception of these channels since the frequency was changed.
I have a Panasonic integrated tv and I have problems with Freeview. Sound is affecting picture. If I turn the sound off or so low it can hardly be heard the picture is fine, but turn the volume to normal levels and picture breakup is intermittent but continuous. I have done a system update and a re-tune to no avail. So I always watch Freesat via my Humax. Does anyone have a solution/
Kenmo: As far as the internal circuitry of the TV is concerned there are no links between audio volume and picture, and what you are reporting is inclined to suggest that the problem is caused by a faulty connection being triggered off by vibration, and so if that model has a headphone socket you should try turning the volume up whilst using the headphone, but though if by any chance the picture still breaks up than that can indicate a fault in the TV's internal power unit.
Kenmo: Yes! try moving the coaxial cable around where it connects into the TV's aerial socket, and should this instantly result in the picture breaking then take the coax plug out and unscrew the plugs rear knurled ring which will then enable you to slip the cable out of the plug body complete with the polythene insulated section, then prise the sides of the compression ring free of the braiding so that you can check to ensure that the middle core of the cable is free from of any strands of braiding touching it anywhere.
But though before dismantling the coax plug, have a look directly into the TV's aerial socket and check that the sockets centre cup where the coax plugs middle pin slides into hasn't been accidentally widened, if it has then squeeze the two halves slightly together.
Kenmo: Just to add to that said something which I should probably have mentioned before, and being, "if" its only the picture that's being affected and the sound is perfectly OK then this eliminates the problem being caused by anything connected to the aerial input, however it does though unfortunately point to the problem being caused by a faulty connection within the TV itself, as although Panasonic's are extremely well made TV's no piece of electronic equipment can ever be claimed to be 100% immune from developing a fault.
Just for a test, reconnect the headphones and whilst viewing the picture tap the bottom underside of the TV near to where the speakers are positioned on each side (or bottom rear) with a rolled up magazine, the idea being to simulate the vibration caused by the speaker.