The FS-Z220 from Rohde & Schwarz is a Waveguide Mixer with RF Frequency 140 to 220 GHz, LO Frequency 8.72 to 13.72 GHz, IF Frequency 5 MHz to 3 GHz, Conversion Loss 32 to 48 dB, LO Drive Level 13.5 to 16 dBm. Tags: Harmonic Mixer. More details for FS-Z220 can be seen below.