[linux-dvb] dvbsak 0.0.2

[Juha Yrjölä <jyrjola@cc.hut.fi>]

Hi,

dvbsak 0.0.2 is available from:

http://jemmari.tky.hut.fi/dvb/dvbsak-0.0.2.tar.gz

Among other things, I've added tuning and basic scanning support
to dvbscan for DVB-C and DVB-S. It has been tested only with DVB-C,
though.

Here's an example run:

jey@jemmari:~/dvbsak$ ./dvbscan -S 7146 --dvb-modulation=64-QAM -z 250000 -s 149000:151000
Found frontend: VES1820/Grundig tuner as used on the Siemens DVB-C card
Scanning from 149.000 MHz to 151.000 MHz using a step size of 250.000 kHz.
DVB-C: 149.000 MHz, symbol rate 7146 ksym/s, modulation 64-QAM
Str[***********         ] SNR[**************      ] BER: FFFFF unc: 007F
DVB-C: 149.250 MHz, symbol rate 7146 ksym/s, modulation 64-QAM
Str[***********         ] SNR[**************      ] BER: FFFFF unc: 007F
DVB-C: 149.500 MHz, symbol rate 7146 ksym/s, modulation 64-QAM
Str[***********         ] SNR[**************      ] BER: FFFFF unc: 007F
DVB-C: 149.750 MHz, symbol rate 7146 ksym/s, modulation 64-QAM
Str[***********         ] SNR[*************       ] BER: FFFFF unc: 007F
DVB-C: 150.000 MHz, symbol rate 7146 ksym/s, modulation 64-QAM
Str[***********         ] SNR[*************       ] BER: FFFFF unc: 007F
DVB-C: 150.250 MHz, symbol rate 7146 ksym/s, modulation 64-QAM
Str[*************       ] SNR[*****************   ] BER: FFFFF unc: 007F LOCK
DVB-C: 150.250 MHz, symbol rate 7146 ksym/s, modulation 64-QAM
Str[*****************   ] SNR[*****************   ] BER: FFFFF unc: 0000 LOCK
DVB-C: 150.188 MHz, symbol rate 7146 ksym/s, modulation 64-QAM
Str[***********         ] SNR[*************       ] BER: FFFFF unc: 007F
DVB-C: 150.250 MHz, symbol rate 7146 ksym/s, modulation 64-QAM
Str[*****************   ] SNR[*****************   ] BER: FFFFF unc: 007F LOCK
DVB-C: 150.312 MHz, symbol rate 7146 ksym/s, modulation 64-QAM
Str[*****************   ] SNR[*****************   ] BER: FFFFF unc: 007F LOCK
DVB-C: 150.375 MHz, symbol rate 7146 ksym/s, modulation 64-QAM
Str[*************       ] SNR[*****************   ] BER: FFFFF unc: 0028 LOCK
DVB-C: 150.438 MHz, symbol rate 7146 ksym/s, modulation 64-QAM
Str[*****************   ] SNR[*****************   ] BER: FFFFF unc: 0000 LOCK
DVB-C: 150.500 MHz, symbol rate 7146 ksym/s, modulation 64-QAM
Str[*************       ] SNR[*****************   ] BER: FFFFF unc: 0000 LOCK
DVB-C: 150.562 MHz, symbol rate 7146 ksym/s, modulation 64-QAM
Str[****************    ] SNR[******************  ] BER: FFFFF unc: 0000 LOCK
DVB-C: 150.625 MHz, symbol rate 7146 ksym/s, modulation 64-QAM
Str[************        ] SNR[******************  ] BER: FFFFF unc: 0000 LOCK
DVB-C: 150.688 MHz, symbol rate 7146 ksym/s, modulation 64-QAM
Str[****************    ] SNR[******************  ] BER: FFFFF unc: 0000 LOCK
DVB-C: 150.750 MHz, symbol rate 7146 ksym/s, modulation 64-QAM
Str[***********         ] SNR[******************  ] BER: FFFFF unc: 007F LOCK
DVB-C: 150.812 MHz, symbol rate 7146 ksym/s, modulation 64-QAM
Str[***********         ] SNR[*****************   ] BER: FFFFF unc: 007F LOCK
DVB-C: 150.875 MHz, symbol rate 7146 ksym/s, modulation 64-QAM
Str[**********          ] SNR[*****************   ] BER: FFFFF unc: 007F LOCK
DVB-C: 150.938 MHz, symbol rate 7146 ksym/s, modulation 64-QAM
Str[***********         ] SNR[*****************   ] BER: FFFFF unc: 007F LOCK
DVB-C: 151.000 MHz, symbol rate 7146 ksym/s, modulation 64-QAM
Str[************        ] SNR[****************    ] BER: FFFFF unc: 0070 LOCK
DVB-C: 151.062 MHz, symbol rate 7146 ksym/s, modulation 64-QAM
Str[****************    ] SNR[****************    ] BER: FFFFF unc: 007F LOCK
DVB-C: 151.125 MHz, symbol rate 7146 ksym/s, modulation 64-QAM
Str[****************    ] SNR[****************    ] BER: FFFFF unc: 007F LOCK
DVB-C: 151.188 MHz, symbol rate 7146 ksym/s, modulation 64-QAM
Str[****************    ] SNR[***************     ] BER: FFFFF unc: 007F LOCK
DVB-C: 151.250 MHz, symbol rate 7146 ksym/s, modulation 64-QAM
Str[*************       ] SNR[************        ] BER: FFFFF unc: 007F
Found TS at 150687.5 kHz!

jey@jemmari:~/dvbsak$ ./dvbscan -F 150687 -S 7146 --dvb-modulation=64-QAM -t -p
DVB-C: 150.687 MHz, symbol rate 7146 ksym/s, modulation 64-QAM
Str[****************    ] SNR[******************  ] BER: 0CC1B unc: 0000 LOCK
Found PAT.
Transport stream: 0x3001, network PID: 0x0010, 7 programs
Found NIT for network 0x0064.
...

It doesn't work as well as it should yet, but at least there's something. =)
So basically dvbscan scans upwards with a fixed step size. When
it first gets a lock, it starts scanning downwards with the smallest step
size until we lose the lock. After that it scans upwards until we
lose the lock again. The average frequency between these two thresholds
is printed.

Cheers,
Juha


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