Rohde and Schwarz has launched the new TMU9 UHF medium-power transmitter and THU9 UHF high-power transmitter clock in with the top energy efficiency scores. With efficiency of up to 38 percent for COFDM standards, the two transmitters claim to reduce energy costs and use Doherty technology to achieve these performance values. The basic principle is […]
Rohde and Schwarz has launched the new TMU9 UHF medium-power transmitter and THU9 UHF high-power transmitter clock in with the top energy efficiency scores. With efficiency of up to 38 percent for COFDM standards, the two transmitters claim to reduce energy costs and use Doherty technology to achieve these performance values.
The basic principle is to split signal amplification between two paths. The advantage is that the carrier amplifier amplifies only the average signal. As a result, this path does not require any reserve capacity for power peaks. The peaking amplifier, on the other hand, only operates when the power level peaks, which saves energy in both amplifiers.
The new TMU9 medium-power transmitter achieves output power levels ranging from 570 W to 2.85 kW for the DVB-T, DVB-H, DVB-T2, ATSC, ATSC Mobile DTV and ISDB-T standards. These output powers are attained using only a single rack, saving space at the transmitter site. This claims to allow network operators to reduce their infrastructure costs. More than 50 different system configurations allow a customised solution for any application. The MultiTX system makes it possible to install up to six single transmitters in a single rack. An N+1 system can also be accommodated in one rack.
The TCE900 platform uses plug-in boards and can be configured either as a transmitter control unit or as an exciter. It is also possible to use only one platform for both functions.
The system configuration allows a quick startup. For example, all components are prewired, and the self-engaging connection of the amplifiers requires no additional cabling.
The liquid-cooled THU9 high-power transmitter has also been equipped with Doherty technology. It achieves high energy efficiency of up to 38 percent for transistor-based TV transmitters.
The new TMU9 medium-power transmitter and optimised THU9 high-power transmitter are now available from Rohde and Schwarz.
