Something you want to check is how that 'modulator' box handles HDCP, it is clearly capable of turning an HDMI input into a DVBT output, but will it only work for unprotected content such as the FTA channels or is it also a HDCP stripper. Generally speaking digital to digital HDCP strippers are as I understand it prohibited under the usage terms for the HDCP chips, which is why you don't see HDMI to HDMI HDCP strippers, but maybe as this converts to DVBT that doesn't apply but as it is not mentioned it is something to check before buying.