[mythtv-users] Fail to tune channels in UK using Rowridgetransmitter

Myth TV mythtv at fsmail.net
Sat Jan 14 10:17:32 UTC 2006




========================================
 Message Received: Jan 09 2006, 09:05 AM
 From: "David Watkins" <watkinshome at gmail.com>
 To: mythtv at fsmail.net, "Discussion about mythtv" <mythtv-users at mythtv.org>
 Cc: 
 Subject: Re: [mythtv-users] Fail to tune channels in UK using Rowridgetransmitter
 
 On 08/01/06, Myth TV <mythtv at fsmail.net> wrote:
 >
 > ========================================
 >  Message Received: Jan 08 2006, 11:00 AM
 >  From: "Steve Daniels" <steve.p.daniels at googlemail.com>
 >  To: "Discussion about mythtv" <mythtv-users at mythtv.org>
 >  Cc:
 >  Subject: Re: [mythtv-users] Fail to tune channels in UK using  Rowridgetransmitter
 >
 >  ----- Original Message -----
 >  From: "Myth TV" <mythtv at fsmail.net>
 >  To: "mythtv-users" <mythtv-users at mythtv.org>
 >  Sent: Sunday, January 08, 2006 9:33 AM
 >  Subject: [mythtv-users] Fail to tune channels in UK using
 >  Rowridgetransmitter
 >
 >  >
 >  > However I am unable to tune it to any channel at all.
 >  >
 >  > I have checked the card and reception using the dvb-utils and dvbstream.
 >  >
 >  > I have managed to get all 85 Freeview channels information using the
 >  > command :-
 >  >
 >  > # scan -u /usr/share/doc/dvb-utils/examples/scan/dvb-t/uk-Rowridge
 >  >  >.tzap/channels.conf
 >  >
 >  > and example of the BBC1 channel information I got is in the attached file.
 >  >
 >  > I am then able to use the following commands to watch BBC1 channel using
 >  > the dvbstream :-
 >  >
 >  > # tzap -r "BBC ONE"
 >  >
 >  > # dvbstream -o -ps 600 601 -qam 16 -cr 3_4 | xine stdin://mpeg2
 >  >
 >  > When trying to tune to BBC1 using the frequency tested under tzap/dvbsteam
 >  > of 489833330 I still get nothing.  I get the same if I try to use the Full
 >  > Scan option.
 >  >
 >  > Can someone please help me with the tuning of my card.
 >  >
 >  >
 >  I assume your running the latest *stable* mythtv. When you say "When trying
 >  to tune to BBC1 using the frequency tested under tzap/dvbsteam of 489833330
 >  I still get nothing" Where did you put this frequency? From looking at your
 >  attachments, if you didn't do so already you want to create a new transport
 >  with the following details:
 >  Standard:     DVB
 >  Frequency:   489833330
 >  Bandwidth:   8 MHz
 >  Inversion:      Auto
 >  Constellation: QAM 16
 >  LP Coderate: Auto (I never bothered figuring out which was which out of
 >  these two so just left em at auto)
 >  HP Coderate: Auto
 >  Trans. Mode: 2K
 >  Gaurd Interval: 1/32
 >  Hierachy: None
 >
 >  YMMV
 >
 >  But I had to set up ALL of my 6 transports for WinterHill manually. The
 >  above will only give you BBC channels if the scan works.
 >
 >  HTH
 >
 >  Steve
 >
 >
 > [ (no name for attachment) (0.2 Kb) ]
 >
 >
 > Steve,
 >
 > Thanks for the pointers.
 >
 > I was using the default 'auto' for the other parameters apart from the frequency setting.  Now reset all according to the channels.conf generated from the tzap I am able to see that scanning for all channels does return all the desired channels.
 >
 > However I am still not able to watch tv.
 >
 > The front end reported that it took long to be allowed to read ...
 > whilst the backend log reported that it could not find tuning parameters for transport 0.
 >
 > In my mythtv-setup I did not have a transport 0
 >
 > I have set up transport for each of the frequency deleted in my channels.conf.  e.g.
 > 489833330
 > 513833330
 > 530167000
 > 545833330
 > 562166670
 > 570166670
 >
 > Please see attached files showing the frontend and backend outputs.
 >
 > Is there something else I should be setting that I am not aware of ?
 
 >I've seen that No PIDS set message from time to time when I've been
 >fiddling with my channel setup. I think it's related to the starting
 >channel - ie the channel that mythtv initially tunes to.  As I
 >understand, if this channel is incorrectly setup, or not broadcasting
 >at the time, then mythtv fails rather ungraciously.  You can fiddle
 >around with the starting channel using the channel editor but I've
 >never been very successful with making this work - for some reason the
 >change doesn't alway stick.
 
> My advice would be to delete all your channels (by letting mythtvsetup
> remove them as it starts) and redoing the auto scan.
> 
> BTW you can get the exact parameters for your transmitter for the
> autoscan from the channels.conf file the tzap produced just look
> across the row for BBC1.  I only had to do a single scan for the
> Crystal Palace transmitter, to get all available channels, and More4
> and ITV4 added themselves automatically,without scanning, when they
> came online.  YMMV.
 
> Hope this helps.
 

David,

That did the trick.

I deleted all the channels and configured 
    3. Video sources
    4. Input connections
    5. Channel Editor

and I was then able to watch all TV and record, etc.

Thank you for the help.





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