Re using a splitter, and going to 2 TVs, ( ie assuming that it's not necessary to tune different programming), I have and am currently doing this both with the ch3/4 RF outputs, and via the RCA A/V jacks, and although it "usually" works OK, it is far from ideal. Signal quality is usually reduced whenever you split these signals.
In addition to wanting to feed more than one TV, I also have the problem of wanting to feed multiple receivers to the multiple TVs. Right now, I have 8 receivers in my basement that I can watch upstairs on my 2 input TV. I basically use 2 A/V switches to do this. The nice thing about one of these A/V switches, which is a RS switch, is that it has 2 A/V outputs. So one thing I have done, is to run one of the outputs to a TV I have in the basement, and the other output upstairs to my TV there. Using the 2 A/V outputs seems to be better than just splitting the A/V lines, because when I have done that, usually one of the 2 paths has a lower resistance, and you'll get one of the TVs working well, and the other doesn't work at all. It seems like when receivers, or a switch like this, have 2 outputs, that it is more than just having the output split, I think they are isolated from each other. Anyway, I know it seems overkill to get a switch to get 2 outputs, when you only have one input, however it is rare these days for people to have only one DVB receiver. Ie eventually you're going to get a 2nd, 3rd, etc. You'll eventually fill up the switch.
Of course, use of the switch implies that you are feeding the TVs with A/V rather than RF. But this brings up another option. Ie most of these DVB receivers have both RF output and the A/V outputs, so the second option is to run A/V to one TV, and run RF to the other TV.
Another option that I am using right now is the use of an old stand alone Series I TIVO. These TIVOs (which don't neeed a subscription btw) have both A/V and RF inputs, and also have both RF, and 2 A/V outputs, so I can use it both as a switch to select one receiver coming in via RF and another coming in via A/V, and then I can send the output to 3 separate TVs if I want, 1 via RF and 2 via A/V. All can be controlled remotely. I actually have 4 receivers feeding my 4x1 switch, and this switch goes into my TIVO's A/V, and a 5th receiver goes into the RF input of the TIVO. I have 3 other receivers, which are computer cards, all of which output separately via either a separate line from the video card, or via cat-5 cable via my LAN to either computers in my house, or to my Roku.
Once all these signals get up to my main TV, however, at that point, I have an two additional
DTV receivers, and TIVOs which feed my TV, and those TIVOs have an RF splitter which goes to my upstairs TV, and is also split to a line which feeds a TV out in my garage. THESE two TVs have rather poor quality video, because I'm just using regular splitters here, with long coax runs.
Anyway, there are a LOT of options, some work better than others, but I've generally had problems every time I've just used a plain splitter. But if the coax runs are short, and you only use a 2x1 splitter, then it does usually work OK.
SORRY. I got a bit wordy again.
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