Hi If you are doing a single device measurement *and* that device is also the reference, the result will simply be the noise from the TICC.
If you are doing an A / B comparison of two devices, both with 1 pps outputs, any error from the GPSDO will scale with the time delta between the 1 pps arrival times. Simply put, no big deal if they are within a few hundred nanoseconds of each other. At long offsets (say a half second) a 1 ppb error from the GPSDO will give you a half nanosecond timing error on the comparison. That may or may not be significant, depending on what else is going on. If your GPSDO’s / standards are running well, you will have a tough time measuring their actual ADEV at short tau with a TICC. What you will be plotting is the noise floor of the TICC. That’s not a knock on the TICC, it does a good job for what it is. It simply can’t do everything …. Bob > On Oct 4, 2018, at 7:49 PM, Chris Burford <[email protected]> wrote: > > Hello All, > I'm very near purchasing a TICC unit to play with and to qualify my > RFS and various GPSDO units. In reading the documentation for the TICC > it requires a 10Mhz source input. > Is (Are) there any issue(s) with using the 10MHz out on the RFS to the > input reference on the TICC while simultaneously using the 1PPS out of > the PRS for measurements? If need be I can use a GPSDO for the > reference input to the TICC. I just thought it would make it easier on > the RFS not having to be both the oscillator source and taking 1PPS at > the same time from the RFS. > I'm guessing that it is ok to source the RFS as the oscillator input > and also measure the 1PPS simultaneously. I'd like to hear what > potential "gotchas" may be lurking. > Thanks for reading,Chris > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
