Hi Tom, >Two questions - Will the internal TI value still be updated against >GPS in this case (as it is with the TBolt)?
No, unfortunately not. There is another (better?) command to manually put the Fury/FireFly units into holdover mode: SYNChronisation:HOLDover:INITiate To get out of manual holdover, use: SYNChronisation:HOLDover:RECovery:INITiate Pretty obscure commands, I forgot about these. >And, is there also a mode where you just freeze the DAC, that is, >holdover without any compensation (no drift or temp corrections). >This being a trick to temporarily maximize short-term stability, a >way to most closely resemble a standalone free-running OCXO. This can be done in two ways: 1) set both tempco and aging to 0.0, and disable the GPS. This will lock the DAC in place. 2) turn on the unit, wait ~10 seconds, then enable the reset via jumper. This will lock the Coarsedac into place, and disable the fine-dac. Absolute frequency will be off a bit due to the disabled fine-dac. Option 2) will disable the CPU, and will reduce any noise that the CPU etc generates, and thus may be a more Time-nutty way of checking the OCXO just by itself. Hope that helps, bye, Said _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.