> I'm actually looking a similar problem.. I want to set up an experiment to > characterize a bunch (several dozen?) of cheap XOs over temperature and > time and power cycles. I'm not looking for 1e-15 adev at 100 seconds kind > of performance: maybe more like 1E-6 or 1E-7 ADEV.
I'd like something like that. I suspect other nuts would too. Please let us know if you find anything interesting. My first thought was to use a bunch of tvb's picPETs backwards. :) Feed them all the same PPS and clock each one with one of the clocks you want to test. But that requires a serial port per XO. Maybe you have an old many-input serial box in the junk bin, but I'm always short of them. How about a PIC/AVR listening on a serial port and driving a big mux? You could probably power it and a HC151 from a modem control pin. A PCB would be mostly connectors. If you are going to make a PCB, you might as well wire up any unused PIC pins to various connectors. Or use USB... A USB to parallel port chip avoids the PIC. -- These are my opinions, not necessarily my employer's. I hate spam. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
