Understanding the behavior off the 3MA-
To go deeper in this, I have changed my setup and using a uncut CDI
Here a couple off steps with are (for now) interesting.
Explanation off oscilloscope signals. (new setup)
The graphics are a bid tight, but needed to do that in order to see the Frequency
Everything lower than 60Hz the ignition pulse firing at the end off the pickup pulse (no delay at all)
You see it here 59,5Hz end pickup signal is same as firing point.
Next step is 60,10Hz and you see that the ignition point has moved.
My logical tells me that from 1800rpm the ignition curve starts working, all before that is hardwired in the CDI
Next Odd thing, the IC ignitionpoint is splitting up at 75Hz. (Not that it influence the ignition point it self as it is still firing at the start off the pulse)
At 74.3Hz the ignition pulse (green) is a solid pulse
At 75,3Hz you see the splitting starts
At 76,3Hz you see the splitting is complete and it will grow further as rpm is rising
Last but not least
The dark blue pulse is coming from the iCP-
It starts to get equal around 90 a 95Hz
And follow the oem ignition pulse until the end capacity off my testing machine witch is around 150Hz.
New update: 17-
Made a new setup in order to investigate the low RPM problem.
As I have a two channel function generator, it was time to use both channels.
Channel One is connected at the 3MA CDI
Channel Two is connected at the iCP-
Now I can measure the 3MA CDI in and outgoing signals and iCP-
But the two units now work completely on there own, no interfering off signals
Its a bid difficult to see with all the wires but here I'm using the two channel function generator
The (test) Icp-
High (small) pulse is given from the pulse generator and is the incoming signal.
Bottom: 3MA CDI (n
Her you can see that the iCP-
This is at 90Hz
Her the 3MA has a delay off 24degrees