The 4028 from Ophir RF is a RF Amplifier with Frequency 1.75 to 1.85 GHz, Gain 58 dB, Gain Flatness ± 1.0 dB max, Output Power 56.021 to 56.99 dBm, Output Power 400.04 to 500.03 W. Tags: Benchtop / Rackmount, Power Amplifier. More details for 4028 can be seen below.