The S21 Series (pulsed) from AMETEK CTS is a RF Amplifier with Frequency 1 to 2 GHz, Gain 60 to 66 dB, Gain Flatness +/- 3.0 dB, Output Power 60 to 66.02 dBm, Output Power 1000 to 3999.45 W. Tags: Benchtop / Rackmount, Power Amplifier. More details for S21 Series (pulsed) can be seen below.