----- Original Message -----
Sent: Sunday, September 23, 2001 12:38
PM
Subject: RE: [ukha_d] OnDigital Signal
Breakup...
The
early UHF only sets had buttons for
BBC1, BBC2, ITA1, ITA2.
Some
early colour sets were Dual Standard VHF/UHF 405/625 line and some of the
buttons were for VHF.
Some
sets also had 2 rotary controls. A switch for VHF channels 2-13 with one
position marked UHF, and a rotary pot with gearing to fine tune anywhere
between 21-68.
Keith
Only 4 - some early TV's had many more station
buttons. It obviously never would have worked very
well.
A reason to switch off the analogue
transmitters sooner ? Perhaps it will last as long as
metrification!
Steve.
----- Original Message -----
Sent: Sunday, September 23, 2001 9:35
AM
Subject: RE: [ukha_d] OnDigital
Signal Breakup...
Many people had the same problem with CH5.
35
& 37 were assigned to channel 5 for large parts of the country and
many
people needed a wideband aerial to get CH5.
The basic
problems are...
1. The channels spacing were only ever designed to
accomodate 4 channels.
2. The UK is physically too small to have the
number of transmitters it
does.
Most of the time the signals
will keep within the defined boundaries of the
transmitter footprint,
but in the summer, atmospheric conditions make the
signals travel much
further into other areas using the same frequencies. Now
the 7 extra
channels are needed everywhere (CH5 + 6 Muxes) anything being
received
on those frequencies will mess up reception.
Because of the above
problems with skip, Channel 5 is often at a much lower
power than Ch
1-4. Digital can work with much lower levels but if it happens
to get
swamped by a strong analogue signal you lose
digital.
Keith
> -----Original Message-----
> From:
Phil Harris [mailto:phillip.harris1@xxxxxxx]
> Sent: 22 September
2001 23:01
> To: ukha_d@xxxxxxx> Subject: RE:
[ukha_d] OnDigital Signal Breakup...
>
>
> I have no
objection to then being in with the analogue channels ... what
>
bums me off is that out here almost everyone needs a new wideband
aerial
> when they switch to digital as the ITV MUX is completely
the
> opposite end of
> the band from all the others and hence
fallsoutside the reception of a
> narrow band
aerial...
>
> Phil
>
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