[mythtvnz] Have I got a dodgy DVB-T card?

[James Booth]

Hi Justin,

I pulled the dongle for the keyboard and it made no difference, though did
not reboot, will try that. Have a pro coming on Monday to conduct signal
tests etc and maybe try a demon aerial out - I'll let you all know how it
goes. 

-----Original Message-----
From: mythtvnz-bounces at lists.linuxnut.co.nz
[mailto:mythtvnz-bounces at lists.linuxnut.co.nz] On Behalf Of Justin Hyde
Sent: Thursday, 16 April 2009 3:23 p.m.
To: MythTV in NZ
Subject: Re: [mythtvnz] Have I got a dodgy DVB-T card?

Further to James' issues with his box, my box experienced some similar
issues on its return home.  Seeing James' setup with wireless keyboard
reminded me that I couldn't connect to my cellphone to Ubuntu 8.10 due to
bluetooth being partially broken in 8.10.  Since I had upgraded to 9.04b the
previous day I thought it apt to see if I could get the bluetooth pairing to
work again, which it did.  All smiles as I could now send and receive text
messages through my computer again.

However...mythtv started to play up in exactly the same way as James' 
box did.  Mythtv was unable to lock to the signal.  Removal of the dongle
did not remedy the signal lock issue, the box needed to be shutdown and
rebooted without the dongle.  I tried adding and removing the dongle several
times with similar results.  So, my feeling is that there is some signal
interference between bluetooth and DVD-T card, maybe because they are both
USB based???  Pure speculation as this area is well out of my area of
expertise.

James, have you tried your system without any wireless mouse/keyboard?

Regards
Justin


James Booth wrote:
>
> OK, a big thanks to Justin who came around this morning with his Myth 
> box so we could do a comparison.
>
> We have worked out I have reception problems. Kind of. Maybe....
>
> Plugging Justins box in we got everything to work, but experienced 
> similar problems to those I get, though where as my box reports signal 
> strength of 95%-99% he only reported around 70%. Eventually we tried 
> using his rabbit ears, which work fine for him at home, but that 
> dropped signal strength to 35% and we could not get a lock on any 
> channel. When we switched back to using my main aerial his box would 
> still not get a lock on anything, until we eventually rebooted, and 
> then it was fine again. Weird.
>
> As it stands, I am sitting here watching TV One on my box with no 
> problems at all (though we did get one lock-up of the front end when 
> we were playing around). TVNZ and Mediaworks all work, but Kordia will 
> not work at all. I guess I can live with that situation!
>
> Given I have very high signal strength, but low S/N, I am 
> hypothesising that I am either getting significant interference from 
> somewhere (anyone know what interferes with DVB-T broadcasts?), or, 
> maybe I am getting multiple reflections that are screwing things up? I 
> also suspect that the cards/drivers/myth are not dealing with the 
> problems of reception as gracefully and consistently as they could.
>
> My next step is to see if I can scrounge a proper Freeview STB (maybe 
> some of the retailers have loan units?) and see how well that works, 
> and maybe play with my aerial alignment, though given that I paid a 
> pro to set that up I had assumed it would be spot-on. If that is all 
> no-go then I will have to kill my dream of HD TV. Sniff.
>
> Cheers again, Justin.
>
> ----------------------------------------------------------------------
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>
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