Re: [time-nuts] HP Z3801 RB fun

2016-12-28 Thread paul swed
​Magnus and Bob. I appreciate the comments and the suggestions are easily implemented. Technical term "Piece-O-cake". One other note the the Z3801 uses a more negative voltage to raise frequency while the Piezo and FRS use a positive voltage. Absolutely agree on the offset​. Been trying to do that.

Re: [time-nuts] HP Z3801 RB fun

2016-12-28 Thread Magnus Danielson
Hi, Well, that was the data I was able to find (and I referred to TvBs page where I found it). If you have more accurate data, please share so we can get the numbers right. The Z3801A will do a least square estimate of frequency error and then translate that into an initial DAC setting assumi

Re: [time-nuts] HP Z3801 RB fun

2016-12-28 Thread Bob Camp
Hi Ummm ….. er …. The 10811 that is used in the Z3801 has a *larger* electrical tuning range than the standard 10811 not a smaller one. It’s tuning range and the TBolt OCXO’s tuning range are very similar. Bob > On Dec 28, 2016, at 6:22 PM, Magnus Danielson > wrote: > > Paul, > > We j

Re: [time-nuts] HP Z3801 RB fun

2016-12-28 Thread Magnus Danielson
Paul, We just want to help you with that curiosity, it sounds like a fun little project. :) The FRS-C [1] has a range of +/- 1E-9 over 0-5V, so EFC sensitivity is 4E-10/V. The Z3801A has a range of 5.20E-10 [2] over -5V to +5V [3], so EFC sensitivity is 5.2E-11/V. So, it looks like you n

[time-nuts] A Leap Second is coming

2016-12-28 Thread Mark Sims
If your device reports the leap second as xx:xx:60, Heather will do an automatic screen dump of the screen to the file "leap_sec.gif". If you don't wan't your location to show up in the dump, with version 5 you can do G L P from the keyboard to not show your lat/lon. SPECIAL WARNING: if you

Re: [time-nuts] HP Z3801 RB fun

2016-12-28 Thread paul swed
Magnus and Bob, Thank you for your response. As far as the original HO 10811 oscillator goes there is some well written details on it behavior and sensitivity. It was not the same as a standard 10811. A far smaller range as I recall. But the data is there. Its funny on the RB I have the EFC range f

[time-nuts] A Leap Second is coming

2016-12-28 Thread Hal Murray
Is everybody setup to watch it and collect lots of data? Anybody have a list of tools/toys for collecting data? An old favorite: www.cl.cam.ac.uk/~mgk25/time/leap/test/timelog.c -- These are my opinions. I hate spam. ___ time-nuts mailing lis

Re: [time-nuts] HP53132A Firmware Version 4613

2016-12-28 Thread Bob Camp
Hi Simple answer - no, you cannot convert one to the other. Bob > On Dec 28, 2016, at 5:54 AM, GandalfG8--- via time-nuts > wrote: > > How similar are the 131A and the 132A ? Is it possible to upgrade a 131 > into 132 ? > > --- > > Interesting question! > > I suspect not, not i

Re: [time-nuts] HP53132A Firmware Version 4613

2016-12-28 Thread Peter Vince
On 27 December 2016 at 20:50, Adrian Godwin wrote: > How similar are the 131A and the 132A ? Is it possible to upgrade a 131 > into 132 ? The one big difference I know of (there must be others) is that the 131A "only" has a time resolution of 500ps, whereas on the 132A it is 150ps. Peter

Re: [time-nuts] HP53132A Firmware Version 4613

2016-12-28 Thread lll...@gmail.com
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[time-nuts] HP53132A Firmware Version 4613

2016-12-28 Thread GandalfG8--- via time-nuts
How similar are the 131A and the 132A ? Is it possible to upgrade a 131 into 132 ? --- Interesting question! I suspect not, not in any straightforward fashion anyway, but I'm sure others would know better than me. >From a quick look at the component level service manuals the har