SigmaCD Series are high-power UHF DTV transmitters that utilize inductive output tube technology and provide high efficiency and cost performance. Each SigmaCD system includes a control cabinet and one to four power amplifier cabinets. The control cabinet houses the system controller, exciter, monitoring and control panel/graphical user interface and an optional second exciter.

• Ultra-linear and hot-pluggable "Diamond Drive" LDMOS IPA omits the need for inefficient feed-forward circuitry.
• Real-Time Adaptive Correction (RTAC) system provides continuous automatic correction of the entire transmitter and RF system, optimizing performance.
• Intuitive Graphical User Interface (GUI) provides simple and easy control of the SigmaCD both locally and remotelly.
• Modular design for future upgrade and power increase.
• SD-1 with non-linear correction for each power amplifier provides the best optimization for each IOT and ensures meeting the FCC mask requirement.
• Fail-safe control system features primary and back-up controllers that are independent of the user interface system, ensuring maximum up-time.
• Backed by the best service and installation team in the industry.
• Field-proven operaction since July 1996 More SigmaCD transmitter are on the air meeting the FCC's spectral mask and 27 dB or better signal-to-noise requirements than any other manufacturer.