The Model 20 from Applied Systems Engineering is a RF Amplifier with Frequency 4 to 18 GHz, Gain 29 dB, Noise Figure 35 dB, Output Power 43.01 dBm, Output Power 20 W. Tags: Benchtop / Rackmount, Travelling Wave Tube Amplifier, Power Amplifier. More details for Model 20 can be seen below.