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List: usrp-users@lists.ettus.com
From: Steven Knudsen
 
Re: [USRP-users] B200mini and low-freq modulation of tx'd signal
Wed, Sep 21, 2016 5:12 PM
The Correlation Estimator Block works fine for my purposes, giving a phase_est that I use to correct the frequency offset. What I’m finding (and this should not be part of this list I know), is the usual problem with a multi-radio, packet-based system.
List: time-nuts@lists.febo.com
From: Bill Hawkins
 
Re: [time-nuts] Time of death-Again (absolute time)
Sat, Oct 30, 2010 5:23 PM
I was thinking that isotope dating could get you in the neighborhood, where you could fine tune the estimate with pulsar phase relationships -- if you could locate the pulsars and predict their behavior at that time.
List: time-nuts@lists.febo.com
From: Will Matney
 
Re: [time-nuts] Three Phase Power
Tue, Jun 28, 2011 12:16 PM
We did this over six months, but when confronted, AEP claimed it was due to estimation, but the so-called reading was different from ours on each bill, and an estimation is supposed to be no longer than three months, or they told us.
List: time-nuts@lists.febo.com
From: Magnus Danielson
 
Re: [time-nuts] Looking for datasheet for Oscilloquartz 8602
Sat, Jun 1, 2013 11:52 PM
The confidence of those parameters will give you the confidence interval for it's estimated behavor, just as the confidence interval for the ADEV will be needed. So, what was your engineering question, really? Cheers, Magnus
List: time-nuts@lists.febo.com
From: Lars Walenius
 
Re: [time-nuts] Another "atomic" clock question
Sat, Mar 8, 2014 11:36 AM
But because of the conservative estimate it might 150 times to small to measure. So randomly delayed reads of the ADC will not matter. That said I'm sure we can do 100X better then the 63 uS estimate. On the other side, charging the cap. Let's say I mis-measured a wire and it is 1cm longer then I though.
List: time-nuts@lists.febo.com
From: EWKehren@aol.com
 
Re: [time-nuts] Low cost GPS module for < 100ns timestamping error
Fri, May 2, 2014 11:59 PM
Some oscillator datasheets specify Allan deviation values, but I guess what I need for estimating worst case timestamp error during holdover periods are actually MTIE values. Is there any way to estimate the latter from Allan deviations specs? Would an ADev of 65 x 10^-9 over 100s imply up to 6.5us of error after 100s? Any thoughts?
List: time-nuts@lists.febo.com
From: Magnus Danielson
 
European Frequency and Time Seminars 2015
Mon, Jul 6, 2015 2:47 PM
The analysis of Omega-counters (those using linear regression for frequency estimation) triggered the discovery of the PDEV measure. However, there you use m-altering weighing rather than the typical fixed width filtering of delta and omega counters.
List: time-nuts@lists.febo.com
From: Joseph Gwinn
 
Re: [time-nuts] A simple sampling DMTD
Fri, Jun 5, 2020 4:44 PM
As was discussed before, bandpass filtering and > more advanced phase estimation are complementary in their results: with > ideal band pass filtering, the phase detection becomes much less critical > (and vice versa).
List: volt-nuts@lists.febo.com
From: Florian Teply
 
Re: [volt-nuts] Approach to calibration
Fri, Jun 22, 2018 9:45 PM
Of course, the more datapoints I have, the more accurate that estimation might be. Then I could use that to project into the future to see when it will likely drift out of spec.
List: time-nuts@lists.febo.com
From: Stewart Cobb
 
Thunderbolt "good performance" example
Sat, Jul 24, 2021 5:44 PM
From several areas of the plot, we can estimate a short-term change of about 75 uV/C, corresponding to a tempco of about 27 ppt/C for the OCXO. Again, not too bad. The control loop time constant was set to 300 seconds. For best frequency performance with this unit, one could set it longer.