[linux-dvb] HDTV tuning.

Soyeb Aswat soyeb at btinternet.com
Tue Sep 26 22:49:42 CEST 2006


Hi,

> > how should I interpret the output of scan, trying to scan for HDTV in
> > London?
> >
> > initial scan file
> >
> > T 554000000 8MHz 2/3 2/3  QAM64  8k 1/32 NONE

These settings are correct and doing dvbscan from the command-line
myself works, so I have to ask what is your aerial setup like and how
far are you from the transmitter?  You are aware that the HD trial in
London is using a low-power transmitter intended to only be receivable
inside the north and south circular road (though people as far afield
have reported receiving it).

Also might I recommend using a recent CVS of Kaffeine.  It's able to
scan and find the HD trial channels, and can easily record them too (it
does a much better job of recording ITV/Ch4/five than VLC does).  You
can't watch the video (hint, hint Christophe), but sound works.

> > Where does it get the frequency 522167000?
> 
> From the Network Information Table (NIT) that is supposed to give a list of 
> available mplex on that network.

That's right and it's also the frequency for the ITV/Ch4/five multiplex.

Just for your info, below is my output from dvbscan.

Regards,

Soyeb


# dvbscan uk-CrystalPalace -a 1
scanning uk-CrystalPalace
using '/dev/dvb/adapter1/frontend0' and '/dev/dvb/adapter1/demux0'
initial transponder 554000000 0 2 1 0 1 0 0
>>> tune to:
554000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_2_3:FEC_1_2:QPSK:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_32:HIERARCHY_NONE
0x0000 0x9044: pmt_pid 0x0258 BBC -- BBC HD1 (running)
Network Name 'Crystal Palace B'
>>> tune to:
554167000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_2_3:FEC_1_2:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_32:HIERARCHY_NONE
0x0000 0x9044: pmt_pid 0x0258 BBC -- BBC HD1 (running)
Network Name 'Crystal Palace B'
>>> tune to:
522167000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_2_3:FEC_1_2:QPSK:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_32:HIERARCHY_NONE
0x0000 0xa045: pmt_pid 0x00a0 ITV -- ITV HD Trial (running)
0x0000 0xa0c0: pmt_pid 0x00b4 Channel 4 -- Ch4 HD Trial (running)
0x0000 0xa0d0: pmt_pid 0x00c8 Channel 5 -- five HD Trial (running)
Network Name 'Crystal Palace B'
>>> tune to:
522000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_2_3:FEC_2_3:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_32:HIERARCHY_NONE
0x0000 0xa045: pmt_pid 0x00a0 ITV -- ITV HD Trial (running)
0x0000 0xa0c0: pmt_pid 0x00b4 Channel 4 -- Ch4 HD Trial (running)
0x0000 0xa0d0: pmt_pid 0x00c8 Channel 5 -- five HD Trial (running)
Network Name 'Crystal Palace B'
dumping lists (8 services)
BBC
HD1:554000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_2_3:FEC_2_3:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_32:HIERARCHY_NONE:0:0:36932
BBC
HD1:554167000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_2_3:FEC_1_2:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_32:HIERARCHY_NONE:0:0:36932
ITV HD
Trial:522167000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_2_3:FEC_1_2:QPSK:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_32:HIERARCHY_NONE:0:162:41029
Ch4 HD
Trial:522167000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_2_3:FEC_1_2:QPSK:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_32:HIERARCHY_NONE:0:182:41152
five HD
Trial:522167000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_2_3:FEC_1_2:QPSK:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_32:HIERARCHY_NONE:0:202:41168
ITV HD
Trial:522000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_2_3:FEC_2_3:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_32:HIERARCHY_NONE:0:162:41029
Ch4 HD
Trial:522000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_2_3:FEC_2_3:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_32:HIERARCHY_NONE:0:182:41152
five HD
Trial:522000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_2_3:FEC_2_3:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_32:HIERARCHY_NONE:0:202:41168
Done.





More information about the linux-dvb mailing list