Hi Normally a 625 is priced above a 620. Rubidium standards have a finite life. You are paying for the Rb when you buy a 625. If the Rb is worn out or nearly at end of life, the 625 is not a good idea.
Bob On Feb 7, 2013, at 7:22 PM, Hui Zhang <[email protected]> wrote: > Hello Dear Group: > > > I am very glad to see so many replies in the morning, and I am very > grateful to every time nuts gave me useful information, your proposal has > strengthened my determination, in fact, I am also very like SR625, So I will > to find and buy a good shape SR625 for my new time interval measure > instrument. > > > Thanks again for everyone's advice, which is very useful to make a choice for > me. Sorry for not reply everyone's mail. > > > Best Regards! > > > Hui Zhang > > > > > > > > > > > > > At 2013-02-08 05:12:37,"Brooke Clarke" <[email protected]> wrote: >> Hi Hui: >> >> The HP 53132A is called a "Universal Frequency Counter" can count frequency >> at 12 digits per second, but that is not the >> case when it is measuring time intervals. The human interface might be >> called user hostile. >> >> The front panel of the SR 620 is marked "Universal Time Interval Counter" >> and is great for making time interval >> measurements. That's why I traded my 53132 for the SR620. >> http://www.prc68.com/I/TandFTE.shtml#SR620 >> >> If you're doing Time Nuts measurements you probably have a good 10 MHz >> oscillator that you can feed into either of these >> counters so getting an optional time base in one of them serves little >> purpose. >> >> Have Fun, >> >> Brooke Clarke >> http://www.PRC68.com >> http://www.end2partygovernment.com/2012Issues.html >> >> Hui Zhang wrote: >>> Dear Group: >>> >>> >>> I am intend to buy a second-hand counter, I have not decided yet >>> between SR625 and HP53132A, they have very close price in surplus market of >>> here, so, which is better choice? Any suggestion will be appreciated. >>> >>> >>> Best Regards! >>> >>> >>> Hui Zhang >>> _______________________________________________ >>> 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. > _______________________________________________ > 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.
