The S251 Series from AMETEK CTS is a RF Amplifier with Frequency 800 MHz to 2.5 GHz, Gain 50 to 60 dB, Gain Flatness +/-3.0 dB, Output Power 49.03 to 59.54 dBm, Output Power 79.98 to 899.5 W. Tags: Benchtop / Rackmount, Power Amplifier. More details for S251 Series can be seen below.