The RX3852-3408-31-48 from RFI Technology Solutions is a Multicoupler with Frequency 380 to 520 MHz, Gain 0 to 15 dB, Gain Flatness +/-1 dB, Noise Figure (Amplifier) 2 dB, INPUT POWER 0 dB. Tags: Rack Mount. More details for RX3852-3408-31-48 can be seen below.