The 5123 from Ophir RF is a RF Amplifier with Frequency 225 to 400 MHz, Gain 51 dB, Gain Flatness ± 2.0 dB max, Output Power 49 to 50.97 dBm, Output Power 79.43 to 125.03 W. Tags: Benchtop / Rackmount, Power Amplifier. More details for 5123 can be seen below.