[mythtv] [PATCH] Experimental full DVB-T scan
andrew-lists at optusnet.com.au
Wed Apr 13 12:44:02 UTC 2005
John Pullan wrote:
> So use Nigel's numbers ? Either the full set or the optimised set ? I'm
> a bit reluctant to use the optimised set, but I will if you guys think
> they are OK for the near future (1 year say).
Didn't get a change to read the full thread before my last response.
Just to confirm I agree the full frequency ranges are:
channels 6-12: 177.5Mhz - 226.5MHz
channels 28-69: 529.5MHz - 816.5MHz
With some random transmitters having a +125kHz offset...
I don't personally see an advantage in optimising the scan, it's
something you only really need to do once. Probably better to catch all
cases than save a bit of time?
My old Nova-T actually scanned much faster than I expected (a minute or
two?), and it's fairly slow to tune. I expect my DVICO would scan faster
but I already have the channels so I haven't tried:)
Also interesting to note my scan picked up all transports at the correct
frequency, but I don't think the old nova-t PLL* can shift too far from
the centre frequency. Maybe the issue with other cards could be driver
related too - which cards are you using Nigel?
It sounds like Nigel has done far more testing than me - I just applied
the patch as I did the big update to the new DVB code. It sounded useful
as I was going to lose my existing channels in the update!
* it's the PLL (phase locked loop) that locks onto the carrier. AGC
(automatic gain control) is for signal strength.
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