In article , john west
scribeth thus
On 25/09/2015 20:20, Bill Wright wrote:
john west wrote:

But the smaller millionaire type planes like the 'Lear Jets' which are
traveling at a lower altitude and which are traveling from east to
west quite close to our house

I could well believe that these might make your signal strength or
quality wobble a bit, based partly on wind turbine experience, also on a
little problem we used to have in the analogue days in the village of
Blaxton, which was near an RAF station.

Digital TV is remarkably good at ignoring all sorts of problems like
this, but . . . BUT . . . the crux of all this is that the signal
strength and quality must be good enough for the disturbance not to take
it below the threshold. The thing with digital telly is that it will
work absolutely perfectly for ever with a signal that is JUST adequate
("Oh that's a good picture! Better than we had with the old analgestic
or whatever they call it!") as long as that signal stays just (or better
than just) adequate. But even a tiny drop in strength or quality will
cause complete breakdown. So the thing is, if you have an abnormal
susceptibility to interference of any kind, the issue isn't the
interference it's the question of whether your installation is able to
produce, at the receiver, a good strong signal with the noise a long
long way below it. If not then you will suffer break up from any damn
stupid little thing that comes along.

If the planes were affecting everyone the way they are affecting you it
would be headline news really wouldn't it? But it's just you. And what's
special about you? Your installation, and the field strength available
to it.

Bill

The signal strength is 63% according to the signal strength meter on our
Humax DTRT2000 digi box.
The new Aerial put up on the wall facing the transmitter is from
Blake-UK and of the type recommended for use with the Crystal Palace
Transmitter.
The at800 engineer is coming again this Monday. Thanks to all.


There might be the problem. It does seem you'd be better off using the
Finchley relay thats intended for your area

Hang on thats one of they that doesn't do all channels;(

Where is this aerial John?, indoors, outdoors on a wall on the chimney
does it point into the air as it were is there a stonking tower block in
line locally or some other obstruction?.

anyone any experience with AT 800 "engineers" or are thy much the same
as channel 5 re-tuners;?.


John, it would be of much use to post a few pictures of the aerial and
where its located a pix is often worth a 100000 words;!.
--
Tony Sayer