Hi Steve, Thanks for the reply, but..... I think I need to use the timer as I said, the PIC has to do other things too (such as scan a front panel full of pots and switches) and this pulse train needs to be "automatic" and invisible to the rest of the processes.

I did try something along the lines of what you suggested, but I was leaning towards setting up a timer then having it time out and reloaded to give another delay, or use one timer to generate the delay, then trigger timer 2 to provide the pulse width. When this timer times out, it would triger another to give the second delay. I've yet to sit down and figure out the fine bits, but I think I need to learn about interrupts and timers on the PIC. Any help would be appreciated.

Thanks.