The QPA-2000-4000-47-47S from Qualwave is a RF Amplifier with Frequency 2 to 4 GHz, Gain 47 dB, Gain Flatness 2±1 dB, Saturated Power 47±0.2 dBm, Saturated Power 50.11 W. Tags: Power Amplifier. More details for QPA-2000-4000-47-47S can be seen below.