[linux-dvb] Can't get signal lock with Hauppauge Nova TD-500
jyrki.n at telia.com
Sat Dec 20 08:20:08 CET 2008
Jyrki Niskala wrote:
> I'm stucked here with a problem with a new Hauppauge card called Nova
> When tuning, I got lock on 4 of 5 muxes. The fifth, non working mux, is
> at 778 MHz.
> It's same behaviour on both tuners, with tzap or MythTV, with or
> without lna option.
> I have also tried with another computer with same result.
> The signal is not a problem. I have 3 other dvb-t cards up and running
> for the moment...
> All muxes are from 538 MHz to 778 MHz (64 QAM, 8 MHz bandwith, 8k
> transmission mode)
For completeness and reference for others I need to close this issue.
By comparing usbsnoop logs from Windows driver with source code of the
demod (dib7000p) I found out that the windows driver is using auto guard
interval when tuning. My channel configurations, tzap and MythTV, was
using manual guard interval at 1/8. After changing my configurations to
use auto guard interval I got 5:th mux working.
Now the card is back in duty ...
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