On 4/26/2023 2:23 PM, Gary Schafer wrote:
Not a narrow enough bandwidth @ 2.6khz to see I’m products of a two tone signal.
All three of the SDRs I referenced in the link yesterday, as well as a
P3, with or without SVGA, are excellent for displaying the bandwidth of
signals -- IF you know what you're doing. Two-tone measurements are not
a great way to look at IMD, because occupied bandwidth depends on a LOT
more than IMD -- it also depends on the nature of the driving signal,
like waveshape of CW and RTTY keying, and the method used to generate
SSB. This pdf shows what I did with P3/SVGA in 2015.
http://k9yc.com/P3_Spectrum_Measurements.pdf
This shows P3 (before SVGA).
http://k9yc.com/K6XXAmpTalk.pdf
73, Jim K9YC
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