there is some leak-current or offset in the integrating amplifier. Suspect the amplifier itself as well. Try to do the integrating amplifier adjustment procedure. Eventually modulator phase needs a little bit adjustment. Be aware that a instrument connected to control output could cause a similar effect. If you consider the specification. The 5061A is within limits. Have fun Hubert
-----Urspr�ngliche Nachricht----- Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Im Auftrag von Poul-Henning Kamp Gesendet: Dienstag, 5. April 2005 18:50 An: Discussion of precise time and frequency measurement Betreff: Re: [time-nuts] 5061 Cs frequency shift with long time constant? In message <[EMAIL PROTECTED]>, Brooke Clarke writes: >> I got my 5061A trimmed to the point where a 5 day run against GPS >> showed an offset of less than 1x10e-13. I then switched the unit into >> the long time constant mode and now see that the offset (over 36 >> hours) is -1.7x10e-12. Nothing else in the setup has changed. Yes, very likely. The leak-current in the integrating capacitor cannot be fully ignored at this level. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | 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 [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
