Re: [time-nuts] Lab Test Equipment
Hi there xx, A 2 channel scope with 2ns per division and ext trigger input would already give you very precise performance data of all three sources against each other.. That's the low-cost solution. On the high end look to buy a Symmetricom Tsc-5115a analyzer. Bye Said Sent from my iPad On Jul 19, 2010, at 21:54, Heathkid heath...@heathkid.com wrote: Hello. I'm new to this list but have 3 Rb standards and am looking at measuring time (or drift between them). What is the most important piece of NIST calibrated test equipment I need to own? Is 3 enough using two Rb standards as a reference/control group (considering the 3rd can vote before being exposed to experiments)? Thanks... ___ 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.
Re: [time-nuts] Lab Test Equipment
Forgot to mention: With the below two instruments you can adjust two of your Rb's so that all have the same frequency by adjusting them so that there is no phase drift over long time periods. You will need to discipline one or more of them to gps to know if this frequency is actually accurate against a Nist standard. If they have a 1 pps input such as the Prs-10 Rb then this is very easy to do. Bye said Sent from my iPad On Jul 20, 2010, at 0:20, Said Jackson saidj...@aol.com wrote: Hi there xx, A 2 channel scope with 2ns per division and ext trigger input would already give you very precise performance data of all three sources against each other.. That's the low-cost solution. On the high end look to buy a Symmetricom Tsc-5115a analyzer. Bye Said Sent from my iPad On Jul 19, 2010, at 21:54, Heathkid heath...@heathkid.com wrote: Hello. I'm new to this list but have 3 Rb standards and am looking at measuring time (or drift between them). What is the most important piece of NIST calibrated test equipment I need to own? Is 3 enough using two Rb standards as a reference/control group (considering the 3rd can vote before being exposed to experiments)? Thanks... ___ 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. ___ 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.
Re: [time-nuts] Lab Test Equipment
Hello, and welcome to the group, and what I find an endlessly fascinating subject. Said's suggestion of using a 'scope is fine, but is mind-numbingly tedious (I've done it!) I think you need a frequency counter/timer whose readings can be output to a computer for subsequent analysis. There are lots to choose from, but I use some old HP (now Agilent) 53131 and 53132 counters. These have a very simple serial port that spits out the data for easy reading by any terminal emulator program. You can then go away and leave the system logging the results, and come back days or weeks later to analyse it. Analysis is a big subject, and pretty much the gold standard is Bill Wriley's Stable32 (http://www.wriley.com/) I don't think you need NIST calibrated equipment. Even if you had something, it would drift eventually - and likely quite soon for measuring rubidiums. Far better, I believe, to get yourself a GPS disciplined oscillator. Short term, its timing will be a bit noisy, but long term it is locked to the ultimate references. Many in this group have a Trimble Thunderbolt which are readily available on ebay. See, for example, ebay item number 290308733659, which is a complete kit of Thunderbolt, power supply, and antenna, being sold by Bob Mokia (ebay seller fluke.l) - another time-nut in China. Peter On 20 July 2010 05:54, Heathkid heath...@heathkid.com wrote: Hello. I'm new to this list but have 3 Rb standards and am looking at measuring time (or drift between them). What is the most important piece of NIST calibrated test equipment I need to own? Is 3 enough using two Rb standards as a reference/control group (considering the 3rd can vote before being exposed to experiments)? Thanks... ___ 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] Lab Test Equipment
Hello. I'm new to this list but have 3 Rb standards and am looking at measuring time (or drift between them). What is the most important piece of NIST calibrated test equipment I need to own? Is 3 enough using two Rb standards as a reference/control group (considering the 3rd can vote before being exposed to experiments)? Thanks... ___ 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.
