Random signals on the amateur bands that talk among us...

The Hall of IMD Infamy

A very special baker's dozen collection called "The Dirty Dozen"


A spectacular S-9 + 40dB signal that stretches out to 22 kHz in width! It sounded as bad as it looks here!


This beauty is roughly 20 kHz wide!
1

Those ripples above the transmitted signal extend the total bandwidth of this signal out to more than 15 kHz total!


This winner is roughly 20 kHz wide.
3

Yes...this is one signal!!!! It goes on and on and on in both directions!

4

This mess is extending out beyond the band edge and rippling through the RTTY station at 4.005 MHz.

5

This signal gives new meaning to "reaching out to touch someone"as it clobbers a station operating 7 kHz up the band.
6

Yes, this amazing devil-horned shape is one signal...

6

This curiousity is roughly 10 kHz wide so compared to many of the others he's looking pretty good!
7

Another 10 kHz wide splatter mode transmission.

8

Distortion products are appearing about 15db below the energy at F-0.
9

This signal sounded as bad as it looks.
9

This attempt at a 3.8kHz ESSB signal is a major fail as the distortion made it nearly unintelligible.
9



Wouldn't it be nice if everyone kept it clean?
1


My ANAN-200D Two-Tone Test Performance
anan200d_IMD




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