Re: New digital TV - dont know whats wrong.


"Dave Farrance" <DaveFarrance@xxxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:ok73t31hetia6lfmg9bscks17o0psn8700@xxxxxxxxxx
" mike/lisa/claire" <gardenofendymion@xxxxxxxxxxxxxx> wrote:
And I'll repeat what others have said: Your TV is remarkably crap for
locking onto the first transmitter that it finds rather than checking for
transmitters of higher power. Most digital receivers, including your
cheap digibox it seems, are capable of selecting the strongest
transmitter.

In the early days this was a major problem, but nowadays most new tellys
seem to be able to sort out the right muxes. I'd be interested to know what
criteria TV sets and boxes apply to muxes and analogue channels when sorting
them. A curiousity the other day was the behaviour of four brand new Sonys
of varying screen sizes. They were all connected to the same TV distribution
system, and all did the usual beautifully efficient auto-tune, except for
one thing. They all latched on to a terribly weak and ghosty ITV analogue on
ch 24, allocating the good strong ch47 signal to position 11. I thought this
was very odd because they all ignored lots of signals that were much better
than the ch24. These days I generally find Sonys and Panasonics a joy to
install because they normally do a faultless auto-tune. Although LGs have
improved massively, I am not surprised with them if I have to spend a good
long time manually shuffling channels. The worst of all are the ones that
appear to be computer monitors with tunes botched into them. Some of these
are actually impossible to tune in a reasonable time and I have thrown the
towel in more than once, explaining the problem to the customer and
suggesting that they would be better to sit and manually tune everything
rather than pay me. This situation arises acutely when there are CCTV
channels that all have to put in the correct order. I always arrange the
channels so that an efficient autotune will put 1 to 5 as normal, 6 and 7
for satellite (there's usually two), and the cameras and multiplex screen in
the right order on 8 upwards. When the sequence ends at 18 or 20 or
thereabouts it is easily possible to spend a full working day tuning in a
houseful of these horrid tellys. These sets also have faults in which they
are obviously interfering with themselves. I've also seen them refuse to
work properly on the signal from a good camera via a good modulator, despite
all possible adjustment of video gain and RF level. A recent sample had a
problem whereby the reception of IR signals from the handset (during volume
adjustment for instance) caused Tetra-like interference on the screen. By
contrast, a decent set will autotune all the channels as described above
perfectly, and display all pictures without problems.

Bill
..


.

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