Can anyone explain what is meant by "Omega suppression" in lock-in amplifier discussions or specifications. I'm usually very good at web-searching, but have been unable to find anything that explains rather than mentions this term. I find it mentioned in some manuals but never explained.
Omega and 2 Omega sound like fundamental and 2nd harmonic, but ...?
In passing only here Setting up a Digitally Tunable Resonator using the HF2LI
Many mentions here MFLI User Manual but meaning uncertain from context.