The DBF1800W3 from Narda-MITEQ is a RF Mixer with RF Frequency 1700 to 1900 MHz, LO Frequency 1700 to 1900 MHz, IF Frequency 20 to 2000 MHz, Conversion Loss 8.5 dB, Noise Figure 9 dB. Tags: Module with Connectors, Double Balanced Mixer. More details for DBF1800W3 can be seen below.