EST observations (kinda long

[Terry Martin]

I just rejoined the group, so excuse my butting into a thread. You look
like you've captured the PWM signal (Pulse Width Modulated), and it
looks like you've interpreted it right to me. 

Tedscj at aol.com wrote:
> 
> In a message dated 2/23/99 1:34:06 AM Eastern Standard Time, Tedscj at aol.com
> writes:
> 
> >
> >  What I saw:  I am going to try to represent what I saw with text.  I hope
> > this
> >  works.
> >
> >  Pretend that the "I"s are shaped like 'cone shaped hats', they are spikes
> > that
> >  go up or down.
> >
> >  RPM Reference Pulse from module to ECM:
> >
> >  at @1200 RPM
> >
> >  ________I_________I_________I_________I
> >     I         I         I         I
> >
> >  at @ 3000 RPM
> >
> >  ___I___I___I___I___I
> >   I   I   I   I   I
> >
> 
> >  And the EST signal from ECM to module:
> >
> >  at @1200 RPM
> >
> >  ________I________I________I________I
> >      I        I        I        I
> >
> >  at @3000
> >
> >  ___I___I___I___I___I
> >  I   I   I   I   I   I
> >
> >
> >  Next come the assumptions:
> >  First, I am assuming the upward spikes represent the 'rising edges' and the
> >  downward spikes represent the 'falling edges' that you would see on a
> scope.
> >
> >  Ex.
> >
> >  ____I____I____I____I   on my tape recorder
> >   I    I    I    I
> >  would be:
> >  -]__[-]__[-]__[-]__[   on a scope
> >
> >  Does this make sense?
> >
> 
> Well, my ASCII drawings didn't come out right.
> If your interested, here's a JPG of a drawing I made of what I saw:
> 
> http://members.aol.com/tedscj/EST.JPG
> 
> Ted



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