Small, portable, frequency agile (42-870 MHz), ATSC 3.0 Modulator with USB input for the real time output of HEVC/ H.265 streams (SPTS or MPTS) to coax RF CCTV systems with ATSC 3.0 tuners. Accepts HEVC/H.265 files from local USB 3.0 stick. Ideal ATSC 3.0 signal generator for demonstrations and testing. Linux® and Windows® SDK available for customization.