Re: [time-nuts] Lady Heather's Tbolt oscillator auto-tune function

If you have a good antenna setup and a constant temperature environment: The way to get the lowest noise over short time periods on a TBolt is to set the TC setting as high as you can (typically 500 to 1000+), and set the Damping factor as fast as you can (typically 0.7 to 1). The reason is

[time-nuts] Lady Heather's Tbolt oscillator auto-tune function

I just ran a tbolt (which has been off for a couple of months) and logged the state for a couple of hours... and then remembered something about the initial DAC value setting that I had figured out long ago... it has little to nothing to do with oscillator disciplining.The tbolt drives the

Re: [time-nuts] Lady Heather's Tbolt oscillator auto-tune function

Warren wrote: A damping setting in a Tbolt of greater than 2 is not a good idea. It is if one is only concerned about frequency stability and accuracy and wants the best performance that can be obtained at tau < about 10 seconds. And a TC setting of >1000 is not a good idea unless using

Re: [time-nuts] Tbolt issues

Know all that that is why we decided not to do it. Not knowing all the ins and outs and limits of the Tbolts that is why I asked the question to begin with Bert Kehren Sent from Samsung tabletCharles Steinmetz wrote:Bert wrote: > On our to do list was temperature

Re: [time-nuts] Lady Heather's Tbolt oscillator auto-tune function

Hi > On Sep 11, 2016, at 11:04 AM, Charles Steinmetz wrote: > > I wrote: > >>> Actually, for best results from a cold start, it is best to set the >>> initial DAC voltage to whatever voltage produces 10.0 MHz *when the >>> oven is cold*. > > Bob replied: >

[time-nuts] TM7000 Manual?

Fellow Clock-tickers, Has anyone ever found a PDF of the manual for the Datum/Symmetricom 'TymMachine' TM7000? Googling has, so far, turned up nothing more than the near-useless data sheet, and Microsemi's site doesn't seem to have anything either (unless I missed it). Thanks.

Re: [time-nuts] Lady Heather's Tbolt oscillator auto-tune function

I wrote: Actually, for best results from a cold start, it is best to set the initial DAC voltage to whatever voltage produces 10.0 MHz *when the oven is cold*. Bob replied: …… errr … that’s pretty far off :) DAC at 10 or 20 minutes is probably the target. No, DAC for

Re: [time-nuts] Tbolt issues

Bert wrote: On our to do list was temperature control and clean up loop. In order to do an analog clean up we need short interval changes and that is why I went on the list since we have not been able to do it and looking at past posting have not found data that will get us there. To do

[time-nuts] Ovenaire OSC 49-56b OCXO

Looking for data on this OCXO. No other markings than “Precision Crystal Oscillator” and the serial. If you have anything, appreciate it. Thanks. 73/jeff/ac0c www.ac0c.com alpha-charlie-zero-charlie ___ time-nuts mailing list -- time-nuts@febo.com

Re: [time-nuts] Lady Heather's Tbolt oscillator auto-tune function

A cold oven freq is off by hundred's by Hz, Much much greater than the range of the Dac The TBolt does not start tuning until it's oven has warmed up. Setting anything in the Tbolt biased on cold start turn-on is counter productive. It takes days or weeks for it settle down. At initial turn-on

Re: [time-nuts] Lady Heather's Tbolt oscillator auto-tune function

Hi > On Sep 11, 2016, at 3:35 AM, Charles Steinmetz wrote: > > Mark wrote: > >> Here's a little info on Lady Heather's oscillator autotune function for the >> Thunderbolt GPSDO > > Thanks, Mark, that is very helpful. > > Accordingly, for people interested in best

Re: [time-nuts] Tbolt issues

Yes Charles I was not part of or following the original Tbolt discussions. My setup at the time was Loran C with Austron 2110, backed up with Cs and 60 Khz using a Tracor 599H. My work was focused on FRK FRS Rb’s using Shera with very good results. At the same time Juerg was using a

Re: [time-nuts] ke5fx.com - something's up

Yep. It should be all good now (once the DNS records propagate.) -- john, KE5FX > Domain name expired on September 8th - needs renewing! > > On 11/09/2016, at 10:48 AM, Nick Sayer via time-nuts wrote: > > > I tried to look for Lady Heather docs today, but it appears like the ke5fx > domain

Re: [time-nuts] Lady Heather's Tbolt oscillator auto-tune function

Mark wrote: Here's a little info on Lady Heather's oscillator autotune function for the Thunderbolt GPSDO Thanks, Mark, that is very helpful. Accordingly, for people interested in best frequency accuracy and stability, I suggest (1) running autotune, then (2) manually setting damping to

Re: [time-nuts] ke5fx.com - something's up

Domain name expired on September 8th - needs renewing! On 11/09/2016, at 10:48 AM, Nick Sayer via time-nuts wrote: > I tried to look for Lady Heather docs today, but it appears like the ke5fx > domain is… funky. > > The name servers are NS1.PENDINGRENEWALDELETION.COM and there are other >