Need a little more info. Do you have more than 1 Voom STB? Do you want to watch different channels on two seperate TV's? Are you using a diplexer? If you simply want OTA in the bedroom, you can split the OTA cable and run additional cable between the split and your bedroom TV. Essentially--just attaching the OTA antenna to your bedroom TV.
If you want Voom in the bedroom along with the locals, and you have 1 STB, you can use the coax-out on the STB to a multiplexer, and run coax to the bedroom. You have to watch the same thing on both TV's unless you have a second STB, and will probably need a remote extender to control that. Or...get a Universal remote that lets you control 2 TV's.
If you have a second STB, then you would split both the OTA and Voom feeds and run lines into the bedroom.