Question about tv turners

With regards to connections - whatever the Tv tuner has as inputs you can use the output of the medium you want to use.

Your current video card will not be effected - the graphics card doesn't have a tuner feature and the tuner and gpu runs off different software.

Live shows you can record. It's the sole purpose of a tuner card - watch TV on the PC and record. Depending on the bundled software of course. Same applies to scheduling, although most tuner cards do come with such software.

PiP depends on the amount of inputs you have - I do not know of tuner cards with multiple inputs (there should be available) and from a single source (TV) that might be hard to do, see below.

Splitting channels from tv in room to something different on your PC depends once again on the source. Here by us, dual view decoders allows for the decoder to provide two seperate channels - but with physical connections (ie 2x RCA Video and audio outputs). So it's possible, but the medium is the constraint.

HD - http://dvr.about.com/od/capturetvw [...] tahdtv.htm

This is over the air HDTV Tuner Cards in USB form. This might yield a better result for what you are after bar PiP.

IF you use some kinda cable box and you wanna get all your channels you want to order another cable box from your company, also make sure you get a tuner card that comes with an IR blaster like the hauppage 1800
http://www.newegg.com/Product/Prod [...] 6815116015

otherwise you may not get all your channels if you simply run a cable to the back of the tuner card.