I am investigating using these mixers for use with a 3.5GHz LO and the doubler leading to mixing with 7GHz.
When I examine a sweep IF from 0-3GHz I observe not only 2*LO+IF (7-10GHz) but also 3*LO-IF (10.5-7.5GHz).
The sweep is recorded here: https://drive.google.com/file/d/1UZsZ3OJ2wlv2pM1S-OPAInMlDN67kI3R/view
It looks like the mixing result of 3*LO-IF is only ~17dB lower than 2*LO+IF.
Is this expected?