Would I be correct to assume that the 1992 (I have one of these bbies as well) reads 9.9999999 * 10**6 when measuring one GSPDO, and using the other as an external reference? Or does it also read 9.99998278? If so I'd be worried about the external ref circuit in my 1992.
Also, would I also be correct to assume that you've cal'd the crystal in the 1992 using the GPSDOs as a ref? As to why both rubidiums read low by exactly the same amount??? That has me puzzled ... -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jim Robbins Sent: 06 June 2008 14:02 To: [email protected] Subject: [time-nuts] Measuring Rubidium frequencies Hi all, I have a problem which I am unable to understand and need some help. I have two M100 Rubidiums, a Racal 1992 counter, a factory standard T'Bolt and a Symmetricom Starloc II. When I set up either GPSDO as the External Timebase for the 1992 and measure either Rubidium, I get the same reading of 9.99998278. When I use the 1992's Internal Timebase, I get 9.99999995. All equipment has warmed up. The antenna is a Symmetricom HP 58532A on the roof. On a few occasions I have seen the frequency drift up to 0.00001722. I would have expected that both Rubies would have read 0.00000000. Any ideas would be much appreciated. many thanks, Jim Robbins _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
