In fact i needed to connect the dvb-card to a source like modulator or just connect to the antenna
After using dvbtune make : dvbtune -n ( to create the network device dvb0_0 ) and ifconfig dvb0_0 up when i 've done ifconfig i saw the dvb0_0 device -- Info: To unsubscribe send a mail to [EMAIL PROTECTED] with "unsubscribe linux-dvb" as subject.
