Can anyone suggest a suitable two-tone generator?
I wrote some notes at Using audio spectrum analysis for end to end linearity testing of an SSB transmitter / receiver system
and I thought I had linked a wav file of the test waveform... but I don't see a link. I will investigate and add a link if the file is online. I am in the process of moving house, and I just thismorning left the place where the file is if it is not online.
Anyway, the article should be of interest, it shows how to use a PC sound card and one of the audio spectrum analysis programs to measure IMD.