Small portable USB powered frequency agile (55 to 810 MHz), QAM 16/32/128/256 compliant test modulator for the real time output of live or stored HD streams coming via IP, ASI or local hard drive to be sent to coax RF CCTV systems with many modern plasma and LCD televisions equipped with built-in QAM tuners. Inexpensive and easy to use device for use in commercial establishments where a video based message is available from a satellite feed or from the local hard drive. A companion SD or HD encoder is recommended where the input is coming from a VGA or DVI output server. Includes comprehensive Windows® 7, XP, or Vista® based transport stream playout application with scheduling.