The FDM-500A from Crane Aerospace & Electronics is a Frequency Multiplier with Output Frequency 10 to 1000 MHz, Input Power 5 to 18 dBm, Harmonics -45 to -25 dBc, Conversion Loss 12 to 17 dB, Frequnecy 5 to 500 MHz. Tags: Module with Connectors, Frequency Doubler. More details for FDM-500A can be seen below.