I have one here on my desk, unwanted from an install but as i am in the Uk its no good to you, this is the one i have here which i ordered from Ireland, hopefully you guys in the States can also get them from local sources, maybe Amazon or ebay ??
http://www.amazon.co.uk/Edision-HDMI-Modulator-Full-Distribution-Black/dp/B00KBXKJ2A
Try that link, its in Engrish lol
Actually its safer to say the receiving end must be able to accept MPEG4, the Box and blurb show DVB-T but i have found issues with early DVBT receivers, they get sound but no image due to them being Mpeg only
In the Uk we have free Tv which is OTA, early versions of freeview were either built into Tv`s or stand alone receivers " Freeview" ( Mpeg2 ) the latest now is Freeview HD ( Mpeg4) The modulator outputs Mpeg4
Thats why mine is sat here doing nothing, the customer wanted there cameras around the house on the Tv`s but alas the Tv tuners turned out to be Mpeg2
The box and blurb on the net is a little miss leading, it should say DVBT-2 but whats printed on the box is DVB-T... you live and learn