The High band spectrum analyser topic prompted me to post similar measurements I made with a low band QMX using an apparently good spectrum analyser.
I've attached the data and my analysis. It should describe what I did.
What strikes me is that the first harmonic may be a bit high, -40 dB on 80m.? The power also seems to be a bit low.
What do people think, do I have anything to worry about?
I did get the feeling that something changed after using it with a vertical antenna, the power seemed to decrease.? I've some spectrum analyser traces before that where the harmonics were lower but they were running at a lower supply voltage.
I know that power levels isn't an exact science but are the harmonics OK?
Chris, G5CTH
