The BEM-2A-500 from Crane Aerospace & Electronics is a Modulator with RF Frequency 10 to 1000 MHz, Voltage -5.2 V, Carrier Suppression -40 to -35 dBc, Insertion Loss 2 to 4 dB, Amplitude Balance 0.20 to 0.5 dB. Tags: Module with Connectors. More details for BEM-2A-500 can be seen below.