[linux-dvb] Re: TDA10045H Patch

[James Conner]

Holger Waechtler wrote:

If you use tzap (DVB/apps/szap/tzap.c in the DVB/ tree, just type make 
in this directory and then create an appropriate channels.conf file 
for crystal palace - example in this directory - ) you get some more 
verbose output that's easier to interpret for debugging purposes. 
Example parameter set below.


Heh.. When I couldn't get tzap to work, I read some docs and then moved 
onto dvbtune.... My dvbtune is from the debian package, so maybe that's 
why I can't get it to work.

stimpy:/usr/src/DVB/apps/szap# !head
head -1 ~/.tzap/channels.conf
BBC 
ONE:505833333:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_3_4:FEC_NONE:QAM_16:TRANSMISSION_MODE_2K:GUARD_INTERVAL_1_32:HIERARCHY_NONE:600:601 

As far as I can tell, my channels.conf should be OK... at least for "BBC 
ONE" anyhow.

stimpy:/usr/src/DVB/apps/szap# ./tzap "BBC ONE"
using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
tuning to 505833333 Hz
ERROR: ioctl FE_SET_FRONTEND failed (Invalid argument)
When this works fine you can create your own updated channel list 
using the scan utility in DVB/apps/scan/. 


Right now scan tells me... "dumping lists (o services)" at the end... so 
I guess I've still got some more work to do.

A while ago someone posted this parameter set for scan (see initial.h 
for more), I have no idea if these parameters are still up-to-date, 
check the providers website for more information:

/**
 *  Crystal Palace, (BBC1, ...)
 */
{
        .type = FE_OFDM,
        .param = {
               .frequency = 505833333,
               .inversion = INVERSION_AUTO,
               { ofdm:
                        {
                                .bandwidth = BANDWIDTH_8_MHZ,
                                .code_rate_HP = FEC_3_4,
                                .code_rate_LP = FEC_NONE,
                                .constellation = QAM_16,
                                .transmission_mode = 
TRANSMISSION_MODE_2K,
                                .guard_interval = GUARD_INTERVAL_1_32,
                                .hierarchy_information = HIERARCHY_NONE
                        }
                }
        }
},

As far as I can tell, this information is still up to date...



Thanks,

Jim



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