-------- In message <c10d6b2a-79c3-931d-1439-347fce06f...@rubidium.dyndns.org>, Magnus D anielson writes:
>Consider that you need to swap the cables to verify that it is static >with the setup and does not follow the cables. Run long series of measurements with the HP5372A OCXO free-running and with it slaved to the DUT clock. Any imperfection in the interpolator will show up as different noise characteristics in the two results. There is a test in the service manual which will give you a good indication how well tuned the interpolator is, run that before touching anything, and don't attempt to tune the interpolator unless you can follow the procedure in the manual *exactly*. PS: I do not recall it being mentioned, but the 1 MOhm input pods are horribly unstable compared to the 50 Ohm input pods, which are basically just a stripline and a BNC connector. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. _______________________________________________ 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.
