The PE8651 from Pasternack Enterprises Inc is a RF Mixer with RF Frequency 2000 to 8000 MHz, LO Frequency 2000 to 8000 MHz, IF Frequency 100 to 4000 MHz, Conversion Loss 6.2 dB, LO Drive - Power 10 dB. Tags: Module with Connectors, Double Balanced Mixer. More details for PE8651 can be seen below.