Ashley, It should be quite easy with any reasonable micro (PIC included) to generate 10kHz using a 1pps reference.
My approach would be to operate a software DDS (essentially a numerical oscillator) with a sine-wave look-up table and 8-bit R-2R ladder on an output port. Operate it in the micro's main loop and choose the phase increment value which gets closest to 10kHz. Then all you do is operate a very short interrupt at 1pps which clears the phase accumulator (or sets it to some arbitrary value). Since at 10kHz the multiplication ratio is very low, the reference provided to the micro need not be anything stunning (crystal to 50ppm or cheap TCXO). With a good reference you could make the interrupt operate every n interrupts. I've used this technique successfully for radio transmission at 181kHz using a 2ppm TCXO and AVR micro. See www.qsl.net/zl1bpu/MICRO/EXCITER/Index.htm. Regards, Murray Greenman _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
