Application Note 2 The Wiltron 5400A Series of Scalar Measurement Systems offer many features for characterizing microwave mixers. This application note describes how these features can be applied to more thoroughly test mixers in less time. Below is a list of mixer characteristics that are commonly measured with a scalar analyzer: ■ LO-to-RF isolation ■ LO-to-IF isolation ■ RF-to-IF isolation ■ SSB conversion loss vs. input frequency (holding IF frequency fixed) ■ SSB conversion loss vs. IF frequency (holding RF frequency fixed) ■ Conversion loss vs. LO power ■ 1 dB conversion compression point