Which PIXAE chip do you have?
Use of the PWM feature would be one way.
Look at the PWMOUT command. See manual 2 page 123.
According to manual does not apply to the 20M.
We
on this forum can help better if we know a little more about you proposed hardware.
EDIT: beaten by the faster finger of Kevrus and Retrolefty.
So there you have it, a choice of PWM, PWM or PWM (unless you have a 20M)