5. Re: Initial SASS test shows bands of harmonics

["Avocet" madl74]

> The fact that the frequencies are spaced out by the same amount up
> the spectrum rather than being multiples is interesting.

The spectrum is multiples of 400Hz The fact that it reaches such high
multiples just indicates a time delay rather than a harmonic
resonance.

> I've just proven it's interference from the M10.

Peter,

The mic circuit will have probably picked up a pulse from the
digitiser with a delay of around 2.5ms. Any digitiser will give off a
lot of hash. This may not even be audible but had "fed forward" into
the mic and back into the digitiser with a repetition rate of 400Hz.
The answer if you want to mount the recorder in the array is probably
to screen it with foil.

David

David Brinicombe
North Devon, UK
Cogito cogito ergo cogito sum - Ambrose Bierce