I have Comcast tv and my tv requires a box and my tv is set to like channel 3 and i change the channel from the box. Will this tuner work? I know its a dual so i can record and watch at same time but will it work with the box? could i flip the tv back and forth from pc input to cable input and still record?
The problem is the cable box. It only outputs one channel at a time. Whatever channel your cable box is set to, that's the only you can record/watch. The only solution at the moment is an internal card from Ceton Corp called the InfiniTV Card, which uses a cablecard from the cable company instead of a set top box.
I would note that SiliconDust is working on a triple tuner card called the HDHomeRun Prime that is an external box which also uses a cablecard.
A multi-stream cablecard is just a card that you lease from your cable company:
This card, inserted into the Ceton Corp InfiniTV Tuner card replaces the need for a set top box. Additionally, instead of handling only one channel at a time, this setup gives your four channels at the same time. So you could watch one channel while recording three others or record four channels all at once.
Note: SiliconDust's HDHomeRun Prime works the same way, but gives your three channels instead of four.