The T3H-20GIS from Marki Microwave is a RF Mixer with RF Frequency 0.01 to 20 GHz, LO Frequency 0.01 to 20 GHz, IF Frequency 0.01 to 18 GHz, Conversion Loss 8.5 to 15.5 dB, LO Drive - Power 15 to 25 dBm. Tags: Module with Connectors, Two Tone Terminator Mixer. More details for T3H-20GIS can be seen below.