Can anyone help with tv tuner (Dell) and laptop connection? does laptop have to stay on alltime to record?

I have a tv tuner and would like to use it instead of my DVR through cable company. Is that realistic? Does laptop have to remain on always in order to record scheduled programs? I also would like to burn recorded programs on CD for travel and possible download on IPOD. Any help or resources to get me started. ... show more I have a tv tuner and would like to use it instead of my DVR through cable company. Is that realistic? Does laptop have to remain on always in order to record scheduled programs? I also would like to burn recorded programs on CD for travel and possible download on IPOD. Any help or resources to get me started. Thxs.
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