Hi All, I tried to find this answer but didn't see anything quite like this. I have put a rather large antenna in my attic to pick up OTA HD signals. The cable from this antenna runs down in my basement where it is hooked up to a splitter (where cable from all rooms in my house are home-runned). My second TV is a Vizio VX37L tv that has only one coax input. Because my new VIP622's output to the second tv is an SD picture, I would still like to view my local OTA channels in HD. Can I use a diplexer or some other device to combine/merge the OTA cable coming from my basement splitter WITH the coax coming from the tv2 output of the VIP622? I really am not a fan of coax switches that select from a-b as the ones I have used in the past have huge signal loss. Thanks for any help!