[linux-dvb] [PATCH] AverMedia AverTV DVB-T 761
js at linuxtv.org
Mon Sep 19 12:40:09 CEST 2005
On Tue, Sep 13, 2005 Joe Orton wrote:
> On Sat, Sep 10, 2005 at 06:57:02PM +0200, Johannes Stezenbach wrote:
> > Hm, that's not the real fix, there seems to be another bug.
> > Can you try the following patch:
> I had a play with this since I also see poor quality with my 761 card,
> trying cpump values of 1, 2 and 3 for the 470..750Mhz range with your
> patch to also do cpump << 6.
> I ran tzap for 60 seconds on a mux at 665Mhz and recorded all the ber
> values, extracted into a spreadsheet:
> cpump 1 2 3
> average 13804 6071 5365
> median 9618 5494 4758
> which is still not exactly great but it seems cpump=3 gives the best
> results; I'll do some more testing with this patched driver and report
> back later in the week. If there's anything else it would be useful to
> test let me know.
I committed my patch now unchanged. The cpump=1 value from the
Windows i2c dump was apparently wrong, 2 vs. 3 doesn't seem to make
that much of a difference so I'd rather not mess with it.
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