[linux-dvb] Re: Fusion HDTV 5

Mac Michaels wmichaels1 at earthlink.net
Tue Aug 16 16:27:03 CEST 2005


On Monday 15 August 2005 10:57 pm, David Engel wrote:
> On Mon, Aug 15, 2005 at 03:34:14PM -0700, Alan Fry wrote:
> > <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01
> > Transitional//EN">
>
> Did you really intend to send HTML email?
>
> > Hi David, I'm just trying to understand where you got
> > to with testing.<br> <br>
> > 1.&nbsp; you run atscscan -A2 (neighbor's cable plugged
> > in)<br> &nbsp;&nbsp;&nbsp; a) using&nbsp; frequency
> > list with QAM64:&nbsp; output 155 services on 18
> > frequencies <br>
>
> I wrote that from memory.  It was actually 290 services
> on 18 frequencies for QAM64 and 25 services on 10
> frequencies for QAM64.
>
> > &nbsp; all identified with '[xxxx]' where xxxx is the
> > same as the digits following the audio pid<br>
>
> Correct.
>
> > 2.&nbsp; you tried azap using video and audio pids both
> > set to zero and the frequencies/modulations<br>
> > output from (1)?<br>
>
> For QAM64, the video pids were always 0.  The ausio pids
> generally ranged from 1 to e with an occasional fffc. 
> The results were the same for QAM256, except 7 video pids
> were non-0.  I can't say for sure if I actually tried to
> tune the non-0 QAM256 channels.  I was already running
> late by the time I tried QAM256 that I didn't try much.
>
> > &nbsp;&nbsp;&nbsp; - you could not get FE_HAS_LOCK?<br>
> > <br>
> > &nbsp;&nbsp;&nbsp; My understanding is that AZAP should
> > lock whether or not you have an encrypted stream.<br>
>
> No, I could get FR_HAS_LOCK.  However, the signal was
> always 0000

This is because I have not found a method to generate a 
signal strength that I like. Signal strength is not 
directly available from the lgdt330x chip. The driver 
always returns 0.

> and any attempts to actually capture anything 
> resulted in a TS stream where mplayer couldn't find any
> video.
>
> I am a little curious about the non-0 video pid services
> on QAM256. It seems odd that of ~315 services, all have
> vidoe pid 0 except for 7. This is just a WAG, but I'm
> wondering if the QAM256 services aren't the local
> channels with the non-0 video pids being the extra
> streams that some stations broadcast.  The total number
> of services would be about right for this area.
>
> David




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