>From looking at the graph over 24 hours it looks like the outer oven varies >about +-.5C. This is from the tbolt temperature sensor as the tbolt is in the outer oven. The inner oven where the oscillator is located holds at 66.4C. My concern is that it looks like the tbolt algorithm controls the DAC voltage depending on the temperature that the tbolt reads. Temperature goes up, the DAC voltage goes up. If the inner oven is holding steady then I don't want the DAC voltage changing if the temperature in the outer oven is changing. Is there any way to tell the tbolt algorithm to ignore the temperature in its DAC calculation?
Wow, I hope this makes sense the way I explained it. Garren -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Bob Camp Sent: Monday, February 25, 2013 6:22 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Lady Heather numbers Hi The unit should not be overly sensitive to temperature. I'd guess that your improvised oven isn't holding temperature very well. The original likely held things to within < 0.1 C at some target in the 85 to 110C range. Bob On Feb 25, 2013, at 7:39 PM, Garren Davis <[email protected]> wrote: > > The antenna has a pretty clear view of the sky. I notice that whenever > a satellite drops out it causes the oscillator white trace and the DAC > green trace to jump around. I wonder why that happens when there are 6 other > good satellites. > > I can go back in time by using the down arrow and I see that it was > pretty steady overnight until the furnace turned on to heat up the house. > It's amazing how sensitive it is. > > Garren > > -----Original Message----- > From: [email protected] [mailto:[email protected]] > On Behalf Of J. L. Trantham > Sent: Monday, February 25, 2013 4:28 PM > To: 'Discussion of precise time and frequency measurement' > Subject: Re: [time-nuts] Lady Heather numbers > > OK. Found the problem. Google Earth defaults to 'East' not 'West'. Forgot > to tell it North/South, East/West. > > Looks like your antenna is near the apex of your roof. > > The 17 minute span of the picture limits the ability to make a 'long term' > assessment. However, looks reasonable compared to mine in NW Florida except > the temps seem a bit higher. > > Joe > > -----Original Message----- > From: [email protected] [mailto:[email protected]] > On Behalf Of Garren Davis > Sent: Monday, February 25, 2013 5:50 PM > To: Discussion of precise time and frequency measurement > Subject: Re: [time-nuts] Lady Heather numbers > > > 33 north, 117 west. I am in southern California. > > -----Original Message----- > From: [email protected] [mailto:[email protected]] > On Behalf Of J. L. Trantham > Sent: Monday, February 25, 2013 3:44 PM > To: 'Discussion of precise time and frequency measurement' > Subject: Re: [time-nuts] Lady Heather numbers > > If I am not mistaken (and I could be), the Lat/Long suggests that you are in > China. Is that correct? > > Joe > > -----Original Message----- > From: [email protected] [mailto:[email protected]] > On Behalf Of Garren Davis > Sent: Monday, February 25, 2013 11:00 AM > To: Discussion of precise time and frequency measurement > Subject: [time-nuts] Lady Heather numbers > > > Hi, > > I have been playing with my thunderbolt and Lady Heather over the weekend. I > hope it's ok that I attached a screen dump of what I have. Can anyone comment > on the picture. It's been running less than a day and I don't know if what I > have would be considered good as far as accuracy and stability is concerned. > > Thanks. > > Garren > > > > > > > ________________________________ > > This message and any attached documents contain information from QLogic > Corporation or its wholly-owned subsidiaries that may be confidential. If you > are not the intended recipient, you may not read, copy, distribute, or use > this information. If you have received this transmission in error, please > notify the sender immediately by reply e-mail and then delete this message. > > _______________________________________________ > 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. > > > ________________________________ > > This message and any attached documents contain information from QLogic > Corporation or its wholly-owned subsidiaries that may be confidential. If you > are not the intended recipient, you may not read, copy, distribute, or use > this information. 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