Elecraft sells a 2T-Generator for those who want to check IMD performance of other rigs: https://elecraft.com/collections/2t-gen-model John AE5X https://ae5x.blogspot.com ------------------------------ >The K3 has a built-in two-tone generator. I've done 100s of two-tone IMD tests >on my K3 and K3S using them and an SDR-IQ as a spectrum analyzer.