Re: [time-nuts] Fwd: FE-5680A Contact FEI

2012-02-18 Thread Peter Gottlieb
Do you believe there may be a problem for those who are reverse-engineering, and posting on the open net, items which may be covered under these regulations? If you do, you may want to consider contacting them off-list and letting them know your concern. Peter On 2/18/2012 10:31 PM, shali.

Re: [time-nuts] Update on Rb Performance

2012-02-18 Thread ws at Yahoo
John If you have the raw phase data, can you post a plot of what the well filtered freq offset looks like over that 10 day period? I've have found a properly filtered high resolution freq vs. time plot provides a lot more useful information than the couple of data numbers of a ADEV plot for ev

Re: [time-nuts] Fwd: FE-5680A Contact FEI

2012-02-18 Thread shalimr9
I work for a defense contractor. We used to make certain commercial test equipment, some 40 year old stuff is still being used today and lots of it has been sold to China, Korea, Taiwan and others with full manuals and schematics. Nowadays, these same manuals and schematics (for the 40 year old

[time-nuts] Power Supply Noise Affects Thunderbolt 1 PPS

2012-02-18 Thread Eric Lemmon
I recently acquired a Symmetricom 8040C Rubidium Standard, hoping to use one of my Thunderbolt GPSDOs to further refine its 10 MHz output. To my surprise, connecting the 1 PPS output to the 8040C did nothing- the "1 PPS SYNC" indicator stayed dark. I hooked up my other Thunderbolt and got the sa

Re: [time-nuts] nanoseconds in the news

2012-02-18 Thread Brendan Minish
All a bit off topic but.. Milliseconds are now worth a great deal. In 2010 one large investment bank valued 1 additional msec of latency between major financial markets at $120 Million per year. This is in turn driving a lot of new fibre projects along new, shorter great circle routes with the