R&S^®NV8600 UHF Transmitter Family

Power amplifiers

Due to the use of advanced LDMOS technology, the power amplifiers offer high linearity, excellent efficiency, and a compact design. A power supply unit is integrated in each of the amplifier modules, which are self-contained units. Virtually no heat is given off to the rack, since all of the heat produced is dissipated via the liquid-cooled heat sink. Each amplifier module is thus self-monitoring and self-protecting. All relevant operat-ing parameters and fault messages are transferred to the transmitter control unit via a CAN bus interface. The amplifier modules can be easily replaced during operation. Protective circuits against reflection, overtemperature, etc, are integrated; in normal operation at +25°C ambient temperature, the junction temperature of the transistors is only approx. +128°C. The increase in efficiency is due to the new circuit design with considerably lower thermal resistance (RTh), which results in higher output power.