Re: Why is aeronautical VHF AM?
No, nothing so deliberate. There's simply an accuracy requirement of a few ppm and that's it.
It got tightened up for the new 8.33kHz channel spacing sets.
The occasional transponder transmissions on 1090MHz for ADS-B out (Charmingly called 'Squitters' - Honest!) have deliberate randomisation of the periods between repeats, to that if one aircraft's squitter tramples another's, then next time they probably won't.
David
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Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done
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