The QIQ4-8.5-3.5 from Qualink Microwave is a RF Mixer with RF Frequency DC to 3.5 GHz, LO Frequency 4 to 8.5 GHz, IF Frequency DC to 3.5 GHz, Image Rejection 35 dBc, Conversion Loss 7.5 dB. Tags: Module with Connectors, I/Q Mixer. More details for QIQ4-8.5-3.5 can be seen below.