[time-nuts] Question about the PLL of Trimble Thunderbold

Mark Sims holrum at hotmail.com
Thu Oct 25 15:03:33 EDT 2018

Lady Heather has an "alternative discipling" routine that "manually" controls the DAC to discipline the oscillator.  It was developed with the help of Warren Sarkison.  It's performance can exceed the Thunderbolt's native disciplining algorithm.


>Yes, the phase difference, often called TI (as in Time Interval), is reported by the TBolt. This is the recent delta between the GPS/1PPS and the OCXO/1Hz. Most GPSDO give you this information. You could then do your own steering using the DAC commands to close the loop. You won't match native performance but it's fine for testing & playing.

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