Rohde & Schwarz has enhanced its R&S THU9 transmitter family to deliver higher maximum output powe r.
The transmitters, which include analog and ATSC support, are available in the same power range as the inductive output tube (IOT) transmitters currently used in North America. At the same time, broadcasters can realize energy efficiency of up to 42 percent for the ATSC standard.
The flexible design of the R&S THU9 transmitters allows them to deliver high output power. Multiple racks can be combined for this purpose. The transmitters can be precisely scaled and deliver up to 50kW of power in four racks.
Rohde & Schwarz uses Doherty technology to achieve superior efficiency. The basic principle is to split signal amplification between two paths. The advantage is that the main amplifier amplifies only the average signal. As a result, this path does not require any reserve capacity for power peaks. The path for amplifying power peaks, on the other hand, only needs to be activated when power peaks are identified.