[mythtv-users] Signal strength, Freeview uk.

Steve Smith st3v3.sm1th at gmail.com
Fri Jun 29 08:47:10 UTC 2007


Freeview signal strength.... nightmare...

Basically you do what works!

1) Signal boosters are also signal degraders I'm afraid, they amplify the
noise as well as the signal and then add some noise of their own.
 I'd try to get rid of them. Freeview doesn't necessarily need strong
signals but it does want clean signals.
2) A dedicated aerial for freeview helps. Nice new clean connections,
satellite grade cable etc etc.
3) Sometimes (esp. with signal boosters) the signal can be TOO strong, in
this case you need an attenuator.
4) An professional aerial installer can work wonders...
5) Generally for analogue TV the signals are constrained to a paricular BAND
of UHF frequencies.g. A B etc.
   Freeview signals for that area are usually
        a) At a minimum in a different band.
        b) In lots of bands.
    Aerials come specified for particular bands A,B or Multiband (I think
this is band X it's been a while).
    In short the aerial on your roof maybe fine for you analogue band but
rubbish for your freeview channels.
    So find out which UHF channels your analogue and freeview MUXes are
broadcast on and get an appropriate aerial. AND
    nice high grade cable and connectors...
    Did I say a professional aerial installer can work wonders? They have
fancy meters to check signal strength at the various frequencies,
    in different positions on your roof etc etc. It's pretty much a one off
payment...


Cheers

Steve



On 29/06/07, Damian Surr <damian at gingermagic.co.uk> wrote:
>
> When I select channels, the signal strength seems to say that I'm
> betting about 17% to 25%. Is this normal or should I be trying to get
> closer to 100?
>
> The house we've moved into has 2 signal boosters attached to the end of
> the aerial lead, the second of which also splits into 4 outputs. This
> arrangement worked fine for our small portable TV getting the standard 5
> channels, but maybe I need more now that I have the 2 Nova-T cards. I
> occasionally can't get any signal and have to plug the portable TV into
> the aerial to tweak the signal strength adjuster on the second booster
> before plugging back into myth.
>
> Do any of you have any experience of this?
>
> Cheers
> Damian
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