The CHK-3500 from Synergy Microwave Corporation is a RF Mixer with LO Frequency 10 to 3500 MHz, IF Frequency 1 to 2000 MHz, Conversion Loss 7.8 to 8.7 dB, LO Drive - Power 23 dBm, P1dB 18 dBm. Tags: Module with Connectors, Triple Balanced Mixer, Down-Conversion Mixer, Up-Conversion Mixer. More details for CHK-3500 can be seen below.