I'll have to get one of those 'round TUIT's' one of these days and check mine.
The interval clearly is not something near .8 sec and, likely, truly 1 PPS along with the 10 MHz output. However, by time nut standards, I have more work to do. Joe -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Scott Newell Sent: Wednesday, January 25, 2012 9:57 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Determination of the placement of the first pps At 09:13 PM 1/25/2012, J. L. Trantham wrote: >Both pin 3 and pin 6 are 'high' when power is first applied. When the >unit 'locks', both pin 3 and 6 go 'low' but pin 6 then puts out a 5 >uSec wide 1 PPS pulse, as judged by my 'calibrated eyeball' which means >that I used a stop watch and counted the time for 10 sweeps of my >scope, triggered by pin 6 and set for 5 mSec/cm sweep. These are, >indeed '1 pulse per second' pulses. I attempted to test a FE-5680A pps against the tbolt. I had the 10 MHz tbolt out to my (somewhat flaky) 5370A's ref in. Here's what I got for 100 events, which took about 3:20 to complete: mean: 999.999 900 993 ms sdev: 253 ps min : 999.999 900 49 ms max : 999.999 901 68 ms evnt: 100 Now this was a few days ago and I was confused so don't put too much trust in these numbers. FYI, the tbolt pps output measured as (not freq, not period): mean: 1.000 000 099 83 Hz sdev: 289 pHz (?) min : 1.000 000 099 04 Hz max : 1.000 000 100 62 Hz evnt: 100 -- newell N5TNL _______________________________________________ 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.
