The IRM50-650 from Sirius Microwave is a RF Mixer with RF Frequency 50 to 650 MHz, LO Frequency 70 to 670 MHz, IF Frequency 20 to 22 MHz, Image Rejection 25 to 28 dB, Conversion Loss 7, 5 dB. Tags: Module with Connectors, Image Reject Mixer. More details for IRM50-650 can be seen below.