[time-nuts] TimeSource 2500

brucekareen at aol.com brucekareen at aol.com
Thu Nov 22 17:35:10 UTC 2018


One disappointment of the Time Source 2500 (also the 2700) is that the premium PRS-10 rubidium oscillator is not active in the timing process unless GPS reception is lost.  The TS2500 monitors the PRS-10 output (along with any other connected frequency references) and tracks the offset from GPS.  If GPS reception is lost, it generates a signal based upon the current PRS-10 output frequency after correcting it for the expected offset.
If other frequency reference signals are submitted to the PRS-10, it will also consider them and their stability history, with respect to GPS, in computing the weighting factors to be summed in deciding upon the offset to be applied to the PRS-10 output.  This is an interesting approach to providing a reliable time-base for communications systems, but perhaps not as well directed to the desires of time nuts.

Bruce, KG6OJI



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