Instrumentation TWT Amplifier The 1177H04F000 Instrumentation TWT Amplifier is a laboratory instrument designed for general purpose microwave applications. It offers a minimum gain of 30 dB, maximum noise figure of 35 dB, minimum spurious modulation of -35 dB, and a maximum VSWR of 3.0:1. RF impedance is 50-ohms. Front-panel provides an easy-to-read Helix Current meter. Frequency Range: 12.4 to 18GHz Power Output: 10 watts Front Panel Connector