Hi As much as can be told from a 17 minute plot - looks ok. The antenna could indeed be a bit higher and that would hopefully take care of the crummy sat c/n numbers. What kind of feed line / antenna are you using? Cable TV RG-6 quad shield from your local big box store is a real good choice for the coax. RG-58/59 are not as good at this frequency.
Bob On Mar 2, 2013, at 9:52 PM, Peter Gottlieb <[email protected]> wrote: > Typical, the image didn't go through. Here is a link to it: > http://petergottlieb.com/images/tbolt.gif > > > On 3/2/2013 9:45 PM, Peter Gottlieb wrote: >> I finally got the antenna outside, but just onto a deck railing and not yet >> up high on the roof. Before I do that, does it look like I'm getting decent >> performance from it? Here is the LH display: >> >> Once up on the roof the Westerly exposure will be improved, but North East >> and South are pretty much clear right now. >> >> Does anything else look suspicious or wrong? >> >> Any hints greatly appreciated! >> >> >> >> On 2/26/2013 1:53 PM, WarrenS wrote: >>>> Can anyone comment on the picture. >>>> I don't know if what I have would be considered good as far as accuracy >>>> and stability is concerned. >>> >>> The screen dump is way too short to give much detail. >>> What can be said from what is there: >>>> From a Ham standpoint it is all working fine and is much better than 1e-9. >>> >>>> From a time nut standpoint it is very poor. >>> It is using the default setting (for the most part) >>> Phase error at -100ns is ~50 times high for the 100 sec TC setting used, >>> (likely due to the high drift rate of the Osc) >>> Frequency error is wondering around 1e-10 is about 50 times higher than >>> what is possible. >>> Effect on freq and phase noise with sat changes is >>10 times more that >>> what is possible with good setup. >>> >>> Concerning your Dac comments, Yes makes sense, but your conclusing is wrong. >>> Can't say or sure, because the 24 Hr + screen shot is not shown, but in >>> general >>> The Tbolt temperature reading has no direct effect on the Dac control >>> voltage unless the Tbolt is in hold over. >>> The Dac voltage changes because the oscillator's freq is trying to change, >>> not the other way around. >>> You can disable the Dac from changing with "dd". >>> >>> ws >>> >>> ******************** >>> From: "Garren Davis" >>> 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 >>> >>> ************************** >>> Garren Davis garren.davis at qlogic.com >>> >>>> 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 >>> >>> >>> >>> >>> 888888888888888888888 >>> _______________________________________________ >>> 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. >>> >>> >>> ----- >>> No virus found in this message. >>> Checked by AVG - www.avg.com >>> Version: 10.0.1430 / Virus Database: 2641/5634 - Release Date: 02/26/13 >>> >>> >> >> _______________________________________________ >> 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. >> >> >> ----- >> No virus found in this message. >> Checked by AVG - www.avg.com >> Version: 10.0.1430 / Virus Database: 2641/5643 - Release Date: 03/02/13 >> >> > > _______________________________________________ > 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. _______________________________________________ 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.
