Re: [time-nuts] On low-voltage TAC/TDCs for a GPSDO

J.D. Bakker wrote: At 23:49 +1200 14-08-2010, Bruce Griffiths wrote: J.D. Bakker wrote: At 19:01 +1200 14-08-2010, Bruce Griffiths wrote: J.D. Bakker wrote: However the ultimate test (other than breadboarding it) is to actually simulate the sampling process and look at the deviation of the

Re: [time-nuts] Low jitter oscillators

Hi You also have a lot of devices being characterized in terms of added jitter doing exactly the same sort of stuff. Bob -- From: saidj...@aol.com Sent: Sunday, August 15, 2010 11:31 PM To: time-nuts@febo.com Subject: Re: [time-nuts] Low jitter

Re: [time-nuts] On low-voltage TAC/TDCs for a GPSDO

Hi I think that adding ADC zero and gain drift would be a good idea. Considering that the hardware will be doing an early/on-time/late calibration cycle every second in between PPS pulses, it should be relatively safe to assume that drift will be calibrated out, no? If you keep the ADC/uC

Re: [time-nuts] Small DMTD project PCBs Group Buy

From: Don Latham d...@montana.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Mon, August 16, 2010 12:56:48 AM Subject: Re: [time-nuts] Small DMTD project PCBs Group Buy Thank You, for the source. This morning I have added

Re: [time-nuts] Low jitter oscillators

On Sun, 15 Aug 2010 16:37:59 -0400 Charles P. Steinmetz charles_steinm...@lavabit.com wrote: Attila wrote: Does anyone have any pointers to recommended reading on the design of such low jitter oscillators? As Bruce noted, low jitter oscillators are available from any number of sources.

Re: [time-nuts] OT: leaching was, Alternative time interval interpolation technique

On Mon, 16 Aug 2010 07:58:01 +1200 Bruce Griffiths bruce.griffi...@xtra.co.nz wrote: Such low jitter oscillators are readily available. With some care (bandpass filtering) a cycle to cycle jitter of around 50fs or so is attainable with a Wenzel OCXO for example. Apropos Wenzel: Is there any

[time-nuts] GR 1115B update

Hi The 1115 seems to be settling in nicely. It's down to 5x10^-10 / day and the rate is still decreasing. Smooth monotonic positive aging so far. It's been on power for just over 2 weeks, so it's well within it's original 30 days to 5x10^-10 spec. I also came across a highly important

Re: [time-nuts] OT: leaching was, Alternative time interval interpolation technique

Hi Single cycle jitter is a bit confusing when you talk about bandwidths of 5Hz to 20 MHz off a carrier. Since phase noise at 5 Hz does contribute to jitter over that bandwidth, an OCXO (with good phase noise close in) would be needed. Bob -Original Message- From:

Re: [time-nuts] OT: leaching was, Alternative time interval interpolation technique

Hi Atila, It's very hard to find a vendor making good (sc-cut) low PN crystals that are not in an ocxo. They are mostly designed to work at inflection points around 90C. No good very low PN vcxos around unfortunately.. Bye Said Sent From iPhone On Aug 16, 2010, at 8:52, Attila Kinali

Re: [time-nuts] OT: leaching was, Alternative time interval interpolation technique

The TDEV plot for the OCXO in question which can be derived from its ADEV plot is perhaps a useful guide to the expected jitter when measuring a particular time interval. For long time intervals the phase noise much closer to the carrier than 5Hz will tend to dominate. Bruce Bob Camp wrote:

[time-nuts] OT NASA Research

Off topic. Some time ago we talked about what would happen if a legally-flown 4lbs weather balloon was being hit by an airplane.. I think this is a similar, albeit somewhat more funny story, but it does show what would happen due to the momentum during such an impact, keeping in mind that

Re: [time-nuts] OT NASA Research

Chicken cannon was a British innovation From Chicken Cannon Wiki. *The chicken gun was first used in the mid 1950s at de Havilland Aircrafthttp://en.wikipedia.org/wiki/De_Havilland, Hatfield http://en.wikipedia.org/wiki/Hatfield,_Hertfordshire, UK.* They refer to the thaw your

[time-nuts] Efratom MGPS MFS-286 Manuals Now Available

The MGPS manual and the MFS-286 Manual have been all but unobtainable for a long time however I have managed to track them down. Symmetricom claims they do not even have these manuals.n Perhaps I can trade them for a new Caesium Beam tube! We now have them available thanks to an Avionics

Re: [time-nuts] OT: leaching was, Alternative time interval interpolation technique

On Mon, 16 Aug 2010 17:53 Attila Kinali [att...@kinali.ch] wrote: Apropos Wenzel: Is there any distributor that sells them in single quantities? Or do i have to get them from Wenzel directly? And is there any price list available? You can buy ultra low phase noise OCXO (and smaller versions

Re: [time-nuts] OT: leaching was, Alternative time interval interpolation technique

On Aug 16, 2010, at 18:35 Said Jackson [saidj...@aol.com] wrote: It's very hard to find a vendor making good (sc-cut) low PN crystals that are not in an ocxo. They are mostly designed to work at inflection points around 90C. No good very low PN vcxos around unfortunately.. It is the nature (or

[time-nuts] WTB: Older Version of LabView

Hi, Does anybody have an older version of NI LabView SW they'd like to sell? If so, please contact me off list. Thanks, -John == ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to