The 5191 from Ophir RF is a RF Amplifier with Frequency 2 to 6 GHz, Gain 43 dB, Gain Flatness ± 1.5 dB max, Output Power 40.792 to 43.01 dBm, Output Power 12 to 20 W. Tags: Benchtop / Rackmount, Power Amplifier. More details for 5191 can be seen below.