Based on GaN technology, the SSPBM-X G-Series X-Band block upconverters provide high power density in a compact size. The available models have 150 W, 200 W and 250 RF output power, an operating frequency between 7.9 and 8.4 GHz, L-band input frequency pf 950 to 1450 MHz, gain of 74 dB, a gain adjustment range of 20 dB in 0.1 dB steps, gain variation over temperature of +/- 1.5 dB, and output VSWR of 1.25:1. Spurious rejection is -55 dBc, harmonic rejection is -40 dBc, and phase noise is -95 dBc/Hz at a 100 kHz offset. Control is provided via RS485 or MIL-STD-188-164A compliant Ethernet, and the enclosure is designed to be weather-resistant. An external 70-dB receive reject filter and harmonic filter are available.