Since I can't get my local Fox station right now, I need to revisit OTA. I have 3 HD DVRs and each room as only two coax runs to it. In the old days, I could use a diplexer to share one of the lines (OTA plus Sat line) and split it back out in the rooms. Last time I looked at this, that wasn't possible anymore using diplexers. is that correct? would I need SWM? would I need to buy it directly from someone or would Directv provide it? would I have to do the install? I doubt I can fix it today but at least I could have it in place in the future.