[mythtv-users] Problems installing second capture card - xmltv id issues?

[David Watkins]

> Yes I've had to put another splitter on the cable. When I scan the
> channels, I get a signal/noise ratio reported. Is this useful to me in
> this regard? Also there's some info about signal strength when tuning
> LiveTV. Are there any rules of thumb on what values I should expect or
> require there? If I'm splitting the lead from the rooftop aerial 4 times
> is there a preferred way to do this?

I don't think 'signal strength' and 'signal-to-noise ratios' as
reported by DVB cards are very helpful.

 "bit-error-rate'  and 'uncorrected error count' are more useful

 http://www.mythtv.org/wiki/Tzap

However, if you're getting pixelation then I'd almost guarantee that
you have an input signal problem.

You might want to think about an amplifier upstream from your
splitter, or a powered splitter.  If you go that route be aware that
the signal can be too strong as well as too weak, so an amplifier that
lets you adjust the gain is preferable.

You shouldn't necessarily need an amplifier for a four-way split but,
if you're pre digital switchover, then the digital multiplexes are
turned down to a relatively low power.