Sub - Channel Guide Info

I have a Legacy Quad with a Mohu Sail antenna. My current scanned channels include local channels and sub channels. (23.1, 23.2, etc) These are local, however my guide is blank. In addition, I have asked tech support (no answer) about using two zip codes to get guide info on the same Tablo. I have 4 tuners, and the Mohu is 70+ miles. Therefore, those channels are in another zip code. If you build a device based on antenna input signal, then it should be able to have guide info available. Any ideas. Thanks in advance.