Comark Adds Two New Air-Cooled Transmitters

Hitachi Kokusai Electric Comark, a manufacturer and supplier of DTV transmitters, encoding systems and associated field services for over 45 years, has introduced the E-Compact EC702MP-BB3 (250W) and EC704MP-BB3 (500W) series high-efficiency air-cooled solid-state UHF DTV transmitters.  These transmitters are being released specifically for requirements of the LPTV repack market.

These two new models, EC702MP-BB3 and EC704MP-BB3, now feature the latest asymmetric broadband Doherty LDMOS amplifiers (the same device as the award-winning Parallax series liquid-cooled UHF transmitters). The amplifier technology allows power efficiency of up to 44%. In addition, these “BB3” models both utilize dual, commercial off-the-shelf AC to DC rectifiers for their power supply system, which utilize a front panel plug-in connection for quick service. Customers can either mount the transmitter in their existing equipment rack cabinet or an optional 10RU rack supplied by COMARK.

The air-cooled PA design includes automatic cooling fan speed control that provides lower acoustic noise levels during operation. The transmitters include a built-in web-GUI and SNMP for remote control and monitoring. The E-Compact also features EXACT-V2 IP Optimized DTV exciters with DualCast technology and is easily upgraded from ATSC 1.0 to 3.0.


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