Is it possible with the math option to see the live engine speed when i measurment the primary or secondary ignition voltage. Need it for a motorbike without tachometer while the eingine is running

Hello and thank you for the post

Could you take a look at this forum post viewtopic.php?p=97581#p97581

This may help but would only provide you a momentary glimpse of engine speed at the end of the capture when using time frames of 200 ms/div or longer

However, if you stop the scope, your RPM math channel value will be displayed immediately

Alternatively you could try using the scope at 100 ms/div to see your RPM math channel displayed live, which sounds like this may be what is required

I hope this helps and please feedback for any clarification on the above

Take care.....Steve