[linux-dvb] TT-1500 / TDA10046

Jouni jouni76 at fastmail.fm
Wed Feb 21 17:55:44 CET 2007


You can check the antenna with ohm-meter, if it is near 0, then it would
short the 5V supply. But if you disabled the 5V with jumper (checked it
with voltmeter?) it would not make difference.

 

On Wed, 21 Feb 2007 14:12:04 +0000, "Nicholas Fearnley"
<nfearnley at dmpip.tv> said:
> I have removed the jumper on the card that provides the amp (there is  
> only one jumper).
> 
> But as to whether or not the antenna still shorts I'm not sure.  Can  
> I check with a multimeter?
> 
> I read about turning off the amp (I2C 0x65) which means little to  
> me!  It's on the wiki.
> 
> 
> On 21 Feb 2007, at 10:44, Jouni wrote:
> 
> >
> > What type of antenna you are using?
> > My TT-1500 will not get good signal, if the antenna shorts the 5V feed
> > for antenna amp from
> > the cards antenna in -connector.
> >
> >
> >
> > On Tue, 20 Feb 2007 23:37:06 +0000, "Nicholas Fearnley"
> > <nfearnley at dmpip.tv> said:
> >> I have had real problems getting the TT-1500 (DVB-T) working.
> >>
> >> I have been using dvbtune for some diagnostics.
> >>
> >> The following should yield BBC Multiplex on my local transmitter
> >>
> >> dvbtune -c 0 -qam 16 -gi 32 -cr 3_4 -bw 8 -tm 2 -f 722000
> >>
> >> It does not, I tried adding 166Khz (722166) but no luck.  So I tried
> >> just working my way through some frequencies.  I can get the
> >> FE_STATUS to report FE_HAS_SIGNAL on some frequencies.  I even get
> >> FE_HAS_CARRIER on occasion but never any more than that.
> >>
> >> Does this mean the tuner is getting *something*.  It's not random for
> >> sure, I always get this result on the few frequencies I have tried.
> >> I am using 2.6.18.1.  I know the signal (antenna) to be OK as I get
> >> no issues with a CX based DVB-T module, on any frequency I pick.
> >> This has to be a driver or settings issue.  I compile the relevant
> >> modules into the kernel, I get valid firmware loads in dmesg (version
> >> 20).
> >>
> >> I can insert relevant debugging code if needed - if anyone has any
> >> ideas what might help.  I can send a TT unit out if anyone needs one
> >> to test with.
> >>
> >> Nick
> >>
> >>
> >> _______________________________________________
> >> linux-dvb mailing list
> >> linux-dvb at linuxtv.org
> >> http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
> > -- 
> >   Jouni
> >   jouni76 at fastmail.fm
> >
> > -- 
> > http://www.fastmail.fm - A no graphics, no pop-ups email service
> >
> 
-- 
  Jouni
  jouni76 at fastmail.fm

-- 
http://www.fastmail.fm - Does exactly what it says on the tin




More information about the linux-dvb mailing list