[linux-dvb] Re: New Input file for dvbscan and new channels.conf for Bremen, Germany

["Robert Schlabbach" <robert_s@gmx.net>]

From: "Hans-Jürgen Ficker" <devnull@backmes.de>
> Input file for dvbscan:
> # DVB-T Bremen
> # T freq bw fec_hi fec_lo mod transmission-mode guard-interval hierarchy
> T 482000000 8MHz 1/2 NONE QAM16 8k 1/32 NONE
> T 538000000 8MHz 1/2 NONE QAM16 8k 1/32 NONE
> T 562000000 8MHz 1/2 NONE QAM16 8k 1/32 NONE
> T 642000000 8MHz 1/2 NONE QAM16 8k 1/32 NONE
> T 666000000 8MHz 1/2 NONE QAM16 8k 1/32 NONE
> T 698000000 8MHz 1/2 NONE QAM16 8k 1/32 NONE

I don't believe this is correct, the fec_hi and guard-interval values are
likely wrong. These parameters would yield 12.06Mbps bandwidth. From what I
heard, the West German DVB-T transmitters are using FEC=2/3 and
guard-interval 1/4, yielding 13.27Mbps bandwidth.

The file may work, but only because the DVB-T card detects the actual
parameters and ignores the wrong ones from the file.

If possible, please use a tool which either parses the NIT in the received
stream, or reads back the TPS parameters from the DVB-T card to get the
_correct_ reception parameters.

Regards,
--
Robert Schlabbach
e-mail: robert_s@gmx.net
Berlin, Germany