Reading the recent discussion about GPS receivers for a Stratum 1 NTP server caused me to reflect on the Symmetricom TimeSource 2500 I have been using for years as a GPS-based frequency reference. I only turn this on for a couple of days when it is likely I will need it, but am not sure if this intermittent operation really achieves stratum 1 performance.
A disappointment of the 2500's architecture is that it burns an SRI PRS-10 in the background as a backup in case of the loss of GPS. This seems wasteful to me as the operating life of the PRS-10 units is not unlimited. I suppose the PRS-10 could be disabled, but this would require some simulation circuitry as the 2500 monitors the PRS-10 and goes into a fault condition if the expected PRS-10 presence is absent. Certainly others have utilized these units for such use. Has anyone performed a detailed evaluation of the 2500 units in intermittent service? Bruce hunter, KG6OJI _______________________________________________ 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.
