----- Forwarded Message ---- From: Brooke Clarke <[EMAIL PROTECTED]> To: Discussion of precise time and frequency measurement <time-nuts@febo.com> Sent: Thursday, 9 October, 2008 10:43:07 AM Subject: Re: [time-nuts] What is the best counter for a Time Nuts? Hi Bruce: The Ref Output on the front panel of the SR620 is derived (1/10,000) from the EXT IN on the rear panel. So when you apply a 10 MHz signal to EXT IN you get a 1 kHz REF OUT. Appendix B in the PSR10 Rubidium source manual describes how to use this along with the arming function to average 1,000 measurements per second resulting in 2E-12 per second on the display... i.e. very close to the HP53132A. So no external hardware is required and no PC to get this result. Have Fun, Brooke Clarke http://www.prc68.com http://www.precisionclock.com Bruce Griffiths wrote: ..... > > It is also possible to use a SR620 or a 5370 to take 1000 timestamps/sec. > However may require using some external hardware (frequency divider). > For maximum accuracy and precision the resultant data has to be logged > and processed off line using a PC or other computer. > _______________________________________________ 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. _______________________________________________ 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.
