This could be done with a LOT fewer chips. Two ways to go 1) All you need is a phase inverter controlled by a one bit signal and an attenuator also controlled by a one bit signal and a small micro controller. the small uP provides the two control signals. It maybe gets time from a 1PPs
2) A faster computer could do direct synthesis of the 60KHz waveform You write 180K samples to a DAC per second One of the $10 ARM SBCs will work. You would need to apply a good 60KHz low pass filter On Mon, Jan 2, 2017 at 1:18 PM, M. Simon via time-nuts <time-nuts@febo.com> wrote: > I have come up with a ridiculously simple WWVB simulator that simulates both > the AM modulation and the BPSK modulation. > > A simple explanation and a link to the core schematic can be found here: > http://spacetimepro.blogspot.com/2017/01/wwvb-simulator.html > I'm working on fleshing out the design and producing a PCB. Any comments or > suggestions before I complete the design are welcome. I will try to > incorporate useful suggestions in the final design. > > Note: I have looked all over the 'net for a similar design or any thing > hinting at it. I found nothing. Once you see the design it becomes obvious. > > What clarified it for me is that I looked at the last diagram in this file > http://www.wparc.us/presentations/SDR-2-19-2013/Tayloe_mixer_x3a.pdf and > then plotted out the digital version of what the one cycle of the carrier > would look like given that the signal is just made up of ones and zeros. > The final design (as far as I have gone) incorporates a synchronizing latch > so the signals only change at the "zero" of the modulator. > > Simon > Engineering is the art of making what you want from what you can get at a > profit. > I like Polywell Fusion. > _______________________________________________ > 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. -- Chris Albertson Redondo Beach, California _______________________________________________ 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.
