Achim Gratz writes: >> If it's any good, buy a Pi-Zero, rip out the X-tal and feed it >> from your LPRO instead. If you only need one GPIO pin, I doubt >> the exact clock frequency matters much. > > I still want to use a GPS timing module and feed the 19.2MHz in from > there. However, I'd rather lock the quartz from the external reference > so when that input fails the quartz will at least keep the system > running. It _should_ be possible to capacitively couple the reference > to the board, but I haven't tried that yet.
Towards that end, I found a small nice looking breakout board with an Si5351B for around $35 (you get to solder the SMA and headers on yourself, the SMD stuff is already done). Replacing the XO with a cheap OCXO would add another $35 it seems and I should be able to feed all rasPi and Tinkerboard with something a lot more stable. Has anybody worked with that chip before and can share some experiences? I'm also looking into getting one of my Spartan-6 boards to function as a TIC. Using ISERDES and overclocking a bit beyond the datasheet values should get me to 1ns resolution without any interpolation and at least the Atlys board has enough LVDS pairs to monitor all of my systems in parallel. Maybe I can even do some interpolation to go to somewhere in the 50…100ps resolution, although I don#t really think it'll give me much of an advantage for this application. For various reasons it seems preferable to move the signals around via LVDS instead of CMOS, so if anybody can share some experiences of which of the many single-ended to differential converters are useful and which ones to avoid (if any) would be helpful. Regards, Achim. -- +<[Q+ Matrix-12 WAVE#46+305 Neuron microQkb Andromeda XTk Blofeld]>+ Wavetables for the Terratec KOMPLEXER: http://Synth.Stromeko.net/Downloads.html#KomplexerWaves _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.