The S31 Series from AMETEK CTS is a RF Amplifier with Frequency 800 MHz to 3 GHz, Gain 48.7 to 57 dB, Gain Flatness +/-3.0 dB, Output Power 44.77 to 56.53 dBm, Output Power 29.99 to 449.78 W. Tags: Benchtop / Rackmount, Power Amplifier. More details for S31 Series can be seen below.