No subject

out of an FS725 to the SR620 reference
input. A second 10MHz output from the FS725 went to the input of an RF
splitter (Minicircuits
15542 Splitter ZSCJ-2-1). The two splitter outputs were connected with
identical 3 inch BNC
cables to channel A and B of the SR620. The 1kHz REF out of the SR620 was
connected to the
EXT input of the SR620. The SR620 was set up for time interval
measurements, starting on
channel A using EXT +/-time gate/arm, with a sample size of 1000. 57600
1-second
measurements were collected, starting on 3/2/04 4:15pm The modified root
Allan variance was
computed to give the graph shown above.)"

On Thu, Mar 3, 2022 at 2:17 PM Bob kb8tq <kb8tq at n1k.org> wrote:

> Hi
>
> The main disadvantage (if you are after ADEV) is the pre-processing
> that takes out the noise you are trying to measure. Getting the repeat
> rate so that you actually got samples once a second (after all the overhead
> and processing) would be a challenge.
>
> Bob
>
> > On Mar 3, 2022, at 2:28 AM, Mete Balci <metebalci at gmail.com> wrote:
> >
> > Hello,
> >
> > Is there any disadvantage of using SR620 with TimeLab as described in
> high
> > res freq. measurement document of SRS ?
> >
> > 1) DUT (10MHz) is connected to External Clock In
> > 2) REF OUT (1kHz) is connected to ChA
> > 3) GPS receiver PPS output configured as 1kHz and is connected to ChB.
> > 4) Sample size 1000
> >
> > Can this value be used in the same sense as in a (normal) single
> > measurement (Ch A: GPS PPS vs. Ch B: DUT output converted to PPS) ?
> >
> > If not, is there still a benefit of maybe converting REF OUT (not DUT) to
> > PPS and using it still like the above configuration but with sample size
> 1 ?
> >
> > Mete
> > _______________________________________________
> > time-nuts mailing list -- time-nuts at lists.febo.com -- To unsubscribe
> send an email to time-nuts-leave at lists.febo.com
> > To unsubscribe, go to and follow the instructions there.
> _______________________________________________
> time-nuts mailing list -- time-nuts at lists.febo.com -- To unsubscribe send
> an email to time-nuts-leave at lists.febo.com
> To unsubscribe, go to and follow the instructions there.
>