Small,  portable, frequency agile, QAM (Annex B), 8VSB, and DVB-T modulator with USB or ASI input for the real time output of Live or Stored MPEG-2 or H.264 streams (SPTS or MPTS) coming via ASI or local hard drive to coax RF CCTV systems with many modern plasma and LCD televisions equipped with built-in QAM or 8VSB tuners.  Inexpensive and easy to use device for use in commercial establishments where a video based message is available from a satellite feed directly to the BNC RF in connector or from the local hard drive and sent to the modulator via USB.  Includes comprehensive transport stream playout application with scheduling.  Includes application to switch via mouse click between QAM, DVB-T, and 8VSB.