w2aew | #310: 3rd order Intermodulation Distortion (IMD) and their effect in radio receivers @w2aew | Uploaded April 2020 | Updated October 2024, 2 hours ago.
This short video discusses 3rd order IMD (intermodulation distortion) products, what they are, and how they can adversely affect radio reception under crowded band conditions. Finally, I show how the proper use of input attenuation can help mitigate the negative effects of IMD.
Notes: qsl.net/w2aew/youtube/3rd_order_IMD.pdf
Spectrum display courtesy of the Spectrum View feature on a Tektronix MSO64 oscilloscope - gotta love that fast update rate, even with 50Hz RBW!