Broadcom 3510 was Re: [linux-dvb] Question regarding Air2PC r3 (Nxt2002 based)...answer may have implications for Nxt200x driver

[Patrick Boettcher]

Hi,

On Tue, 29 Nov 2005, CityK wrote:
>>> If so, from what I've heard, it only works with 8VSB -- NOT QAM signals. 
>>> Patrick told me that, and that is why I didnt buy it on ebay.  $49.95 
>>> buy-it-now!
>> 
>> No, that was the r2 card, based on the Broadcom 3510.
>> 
>> For more information regarding some confusion about the Air2PC see:
>> 
>> http://www.linuxtv.org/pipermail/linux-dvb/2005-September/004600.html
>> 
>> Anyways, the r3 does demodulate QAM -- you can read about some user 
>> experiences here: http://www.avsforum.com/avs-vb/showthread.php?t=509869
>> 
>
> In regards to the Broadcom 3510 based Air2PC r0.2 card still selling on ebay, 
> it appears from the Broadcom product brief 
> (http://www.broadcom.com/collateral/pb/3510-PB05-R.pdf ) that it should be 
> able to handle demodulation of a QAM source.  Anyone know of any show 
> stoppers that might prevent that from being realized? (Patrick?)

Maybe it is working with QAM64, I just tested it with QAM256 and there was 
a unreasonable high error rate.

BBTI told me that there are some hardware problems (either in the demod or 
in the tuner not being able to shift QAM-signals correctly to IF) which 
prevent the device from being used with QAM.

best regards,
Patrick.

--
   Mail: patrick.boettcher at desy.de
   WWW:  http://www.wi-bw.tfh-wildau.de/~pboettch/