The SHM 325-500 | 2000055 from Radiometer Physics GmbH is a Waveguide Mixer with RF Frequency 325 to 500 GHz, LO Frequency 162.5 to 250 GHz, IF Frequency DC to 18 GHz, LO Drive Level 10 dBm, P1dB -5 dBm. Tags: Sub-Harmonic Mixer. More details for SHM 325-500 | 2000055 can be seen below.