Linux::dvb provides an interface to the linux dvb api. it is a straightforward translation of the c api. you should read the linux dvb api description to make any sense of this module. it can be found here:

http://www.linuxtv.org/docs/dvbapi/dvbapi.html

noteworthy limitations of this module include: no interface to the video, audio and net devices. if you need this functionality bug the author.