I have updated the K8 test report and attached to end of my first post in this thread new report has K8 in title. When I did original testing I use a 50hz square wave as input, while the tests I conducted and reported still applies I missed the effect of having a variable width duty cycle in the input signal. It turns out this has a major effect on the output signal as it changes the voltage offset in the range of 2 to 10 volts. The offset and gain functions described in original report still apply.
The updated report shows includes tests showing this effect. This variable duty width pulse is generated in the Digital Means Card (K11) which I used to do these additional test. I have also included a discussion on the symbol on the schematic that shows K8 is sync on the trailing edge of the [M] signal and why this is important. Quick answer is this is needed to cause the voltage to rise with a larger duty cycle pulse and to cause the analog wave to cross zero in the position direction at the start of the gate pulse.
This is done by using the [M4] signal from K11 as the leading edge of [M4] is the trailing edge of [M]. This is true because [M4] is the inverse of [M] and the are in sync. As [M] is is use to generate the gate and the gate is use use to generate the Digital signal that means the analog wave will be in the proper location in the pulses sent to VIC coils.
The updated report shows includes tests showing this effect. This variable duty width pulse is generated in the Digital Means Card (K11) which I used to do these additional test. I have also included a discussion on the symbol on the schematic that shows K8 is sync on the trailing edge of the [M] signal and why this is important. Quick answer is this is needed to cause the voltage to rise with a larger duty cycle pulse and to cause the analog wave to cross zero in the position direction at the start of the gate pulse.
This is done by using the [M4] signal from K11 as the leading edge of [M4] is the trailing edge of [M]. This is true because [M4] is the inverse of [M] and the are in sync. As [M] is is use to generate the gate and the gate is use use to generate the Digital signal that means the analog wave will be in the proper location in the pulses sent to VIC coils.