[time-nuts] Special connector for Symmetricom X72 rubidium standard
holrum at hotmail.com
Tue Aug 15 11:28:29 EDT 2017
Symmetricom sold some interface boards for the X72. They are 0.32-ish inch thick PCB's with a dual sided edge tab pattern on them. The PCB edge tab will insert into the connector on the X72. The interface board for my X72's only breaks out 12 pins... a lot of Ebay X72's come with that 12 pin connector board... I think that they were pulls from some piece of equipment. My X72's only had 250 hours on them.
I have been thinking about laying out an X72 interface board that has the edge tab broken out to a standard 26 pin 0.1" pattern, a RS-232 inteface, BNC's for the 10 MHz, ACMOS output, 1PPS in, 1PPS output, etc. The board would also have a way to connect it to the SA22.
Lady Heather now talks to X72's (and probably X99's and SA22's). I have implemented a disciplining algorithm for use with X72s that have the older firmware that does not do disciplining... like probably 99% of the X72's out there. Symmetricom's code only seems to keep the 1PPS aligned with 300 ns. My code attempts to keep it within 100 ns.
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