[alistairsam]

Hi,
would anyone know details of how guide camera signalling works?
I'm guessing ST4 and LX200 protocols are sort of standards from respective manufacturers, I'm trying to understand how correction pulses are framed from guide cameras so I can interface it to my microcontroller based stepper drive for tracking.

to explain further, I've built an mcu based stepper controller for a home built fork mount, and i'd like to add an autoguider so I can send correction pulses to dec and ra motors to compensate for drift.

i've come across the pinouts for the guide cameras, dec-, dec+, ra-, ra+, but needed to know how the signals are sent, their pulse widths, etc.

are they pulses, do they use pwm?

thanks.