[linux-dvb] [PATCH] TRL nominal rate implementation
crope at iki.fi
Fri Jan 26 00:19:05 CET 2007
Same patch as earlier, but now with fixed nominal rate calculation.
Still I don't have any idea why real xtal freq differs from freq used in
code. Interesting enough, the difference between real and software
frequency is just 2048 (kHz) :)
It could be interesting to see what are used values in case of different
xtal. Does someone have a stick with zl10353 demod and different xtal?
Tested successfully with au6610 & gl861 against fi-Oulu frequencies.
Signed-off-by: Antti Palosaari <crope at iki.fi>
Regards Antti Palosaari
Antti Palosaari wrote:
> Implement trl nominal rate calculation to Zarlink ZL10353 demod. Patch
> is based on calculation used in Zarlink MT352 which seems to be very
> There seems to be a little difference in calculation that I haven't
> found yet. Using bandwidth 7 it gives rate 0x5ae8 instead of 0x5ae9
> which have seen in logs sniffed from windows driver. I assume that this
> small difference does not have any effect.
> The other thing I don't understand is xtal used in hardware is 20.480
> MHz, but in code it needs to be set 22528. Does anyone know why the
> With those two "findings" I assume that there is still a slight
> calculation error. I did simple openoffice spreadsheet to calculate
> nominal rate, try it and find correct formula :)
> Signed-off-by: Antti Palosaari <crope at iki.fi>
> Regards Antti Palosaari
tel. +358 40 535 7322 | MSN Messenger crope at iki.fi | www.palosaari.fi
-Kahta asiaa en ymmärrä.. C-kielen syntaksi ja naisten logiikka.."
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