[PD] request assistance with crackles and pops in VFOs driven by modulating accelerometer signals

marius schebella marius.schebella at gmail.com
Thu Jul 24 16:42:48 CEST 2008

Andy Farnell wrote:
> On Thu, 24 Jul 2008 13:22:47 +0900
> "hard off" <hard.off at gmail.com> wrote:
>> by the way, is it even possible to get clicks when rapidly changing osc~
>> speeds?  i didn't think it was, and i have never experienced that.
> Think of the modulating signal as a triangle wave altering the frequency 
> of [osc~]. As the change becomes fast and large, when the slope is big, then
> it's become FM giving us a bunch of sidebands. If a large change happens
> briefly a spike of new harmonics will be heard as a click.
> What might be in Darrens data stream? 
> 100, 101.2, 99.98, 101.7, 102.21, 0, 102.96, 103.2
> A spurious zero like that would cause a problem.
> So, it's a good idea to look at the data closely to see what's going on.

I think it should be fairly easy to sort out sensor data of the stream 
that are most likely erroneous (like big jumps). isn't there already an 
object like [trust] or [believe]?

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