IMD and Splatter
7 September 2024 at 09:27
I think the point I was trying to make about the influence of signal strength is here:Β Β
Referring to fig. 1C, note the high level of rf at the 3rd order level - typically 36-dB down. Consequently, there will be rf energy outside the normal 23 kHz passband that will be only 36-dB below the carrier peaks, or about one four-thousandth of the peak power.Β Not bad if the station is only 25-30 dB out of the noise, but very objectionable if it's 40-60 dB out of the noise.
I think it is supposed to read "2-3 kHz passband" vice "23kHz passband."
I guess the point is that QRP levels of operation can hide a host of ills.Β Β IMD ills.Β This makes me wonder about the cleanliness of my own signals.Β Β I will have to do some more careful measurements.Β