Re: [time-nuts] Reflections and Low Phase Noise
On 09/22/2013 02:35 AM, Hal Murray wrote: >> For those that have not been in Boulder, you should realize that it is just >> downhill from the mountains. Multiple small creeks run through Boulder as >> the rain poors off the Rocky Mountains, like the Flatirons that dominate the >> view of Boulder. Boulder really stops at the Rocky Mountains. > Except the creeks aren't so small when it rains hard. They have a large > collection basin. Which is my point. By giving an image of how these usually nice little creeks goes through Boulder, you then realize how much damage they can do when there is a lot of water. Cheers, Magnus ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Reflections and Low Phase Noise
I have heard it called about everything up to a 1000 year flood. But I also heard a University of Colorado professor who monitors Boulder creek called it a twenty five year flood. In any case I was lucky. Thanks; Thomas Knox > To: time-nuts@febo.com > From: hmur...@megapathdsl.net > Date: Sat, 21 Sep 2013 17:35:49 -0700 > Subject: Re: [time-nuts] Reflections and Low Phase Noise > > > > For those that have not been in Boulder, you should realize that it is just > > downhill from the mountains. Multiple small creeks run through Boulder as > > the rain poors off the Rocky Mountains, like the Flatirons that dominate the > > view of Boulder. Boulder really stops at the Rocky Mountains. > > Except the creeks aren't so small when it rains hard. They have a large > collection basin. > > I've seen this described as a 1000 year flood, but I don't know how credible > that was. For something like that, the only solution is to not live in the > lowlands. > > For those of you who haven't seen it in the news, here are some good pictures: > > http://tinyurl.com/lk2kuwr > http://www.theatlantic.com/infocus/2013/09/historic-flooding-across-colorado/1 > 00591/ > > http://tinyurl.com/l9qkb6r > http://www.theatlantic.com/infocus/2013/09/colorado-flooding-after-the-deluge/ > 100594/ > > > -- > These are my opinions. I hate spam. > > > > ___ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Reflections and Low Phase Noise
Looks like Colorado's version of a hurricane. I'm pretty much convinced that, no matter what you have or where you live, Mother Nature can pretty much take it all away from you without much warning using wind, fire, water, and/or earth quake. Life is about the journey, not the destination. All we can do is try to prepare. God Bless. Joe -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Hal Murray Sent: Saturday, September 21, 2013 7:36 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Reflections and Low Phase Noise > For those that have not been in Boulder, you should realize that it is > just downhill from the mountains. Multiple small creeks run through > Boulder as the rain poors off the Rocky Mountains, like the Flatirons > that dominate the view of Boulder. Boulder really stops at the Rocky Mountains. Except the creeks aren't so small when it rains hard. They have a large collection basin. I've seen this described as a 1000 year flood, but I don't know how credible that was. For something like that, the only solution is to not live in the lowlands. For those of you who haven't seen it in the news, here are some good pictures: http://tinyurl.com/lk2kuwr http://www.theatlantic.com/infocus/2013/09/historic-flooding-across-colorado /1 00591/ http://tinyurl.com/l9qkb6r http://www.theatlantic.com/infocus/2013/09/colorado-flooding-after-the-delug e/ 100594/ -- These are my opinions. I hate spam. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Reflections and Low Phase Noise
> For those that have not been in Boulder, you should realize that it is just > downhill from the mountains. Multiple small creeks run through Boulder as > the rain poors off the Rocky Mountains, like the Flatirons that dominate the > view of Boulder. Boulder really stops at the Rocky Mountains. Except the creeks aren't so small when it rains hard. They have a large collection basin. I've seen this described as a 1000 year flood, but I don't know how credible that was. For something like that, the only solution is to not live in the lowlands. For those of you who haven't seen it in the news, here are some good pictures: http://tinyurl.com/lk2kuwr http://www.theatlantic.com/infocus/2013/09/historic-flooding-across-colorado/1 00591/ http://tinyurl.com/l9qkb6r http://www.theatlantic.com/infocus/2013/09/colorado-flooding-after-the-deluge/ 100594/ -- These are my opinions. I hate spam. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Reflections and Low Phase Noise
Tom, Don't forget the 'stand-by' generator to keep that pump running. If you have natural gas and can 'plant' a propane tank in the ground, you can get an automatic transfer, dual fuel, generator with an automatic transfer switch to power the entire house and automatically put the generator and transfer switch through its paces on a weekly basis. If you do this, all you will need to 'back-up' the CS standards and other 'time-nut' related equipment is a battery that will last about 10 minutes at the most. Good luck. Joe -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Tom Knox Sent: Saturday, September 21, 2013 12:50 PM To: Time-Nuts Subject: [time-nuts] Reflections and Low Phase Noise If this at first appears to be off topic read on. Having this year survived fire evacuations and most recently what has been called anything from a five to 1000 year flood here in Boulder, I have has a little time to reflect on just how lucky I was. Over the last few years I have made a few upgrades to harden my home against natural disasters. Adding sprinklers to the roof and a industrial sump pump in my basement. To say the least it paid off in a big way last week, since if my basement had flooded I would have lost my lab that I have spent several decades building. It has motivated me to finish upgrading my grounding and lightning protection with a new eye to detail. I write this post to encourage others to do the same by spending a few minutes to look for any vulnerabilities and spend a few days addressing them. Or at least upgrading insurance. For many here in Boulder lately there is nothing they could have done, but for amny other a few minutes could have saved them months of work. If I can help just one Time-Nut save his lab it is worth it. Now for the good stuff, We all have our idea of what a low or Ultra Low phase noise oscillator is. For 5 and 10MHz references I usually look first at 1Hz offset then the noise floor. At 5MHz I consider 125dB @ 1Hz state of the art. But now Arcihita Hati and colleges at NIST has designed a State-of-the-Art RF Signal Generation From Optical Frequency Division that sets a new standard for low phase noise with nearly -155dB @ 1Hz for a 5MHz reference. All I want to know is when will it be available as a single chip. And how long before Magnus, TVB, and other Senior Time-Nut have a workable prototype in their labs? The NIST link is not yet active, but if you would like a copy of the paper now email me off list I will send you the paper as an attachment. I think it may also be posted on IEEE's pay to play site. Thomas Knox ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Reflections and Low Phase Noise
Hi, On 09/21/2013 07:50 PM, Tom Knox wrote: > If this at first appears to be off topic read on. > Having this year survived fire evacuations and most recently what has been > called anything from a five to 1000 year flood here in Boulder, I have has a > little time to reflect on just how lucky I was. Over the last few years I > have made a few upgrades to harden my home against natural disasters. Adding > sprinklers to the roof and a industrial sump pump in my basement. To say the > least it paid off in a big way last week, since if my basement had flooded I > would have lost my lab that I have spent several decades building. It has > motivated me to finish upgrading my grounding and lightning protection with a > new eye to detail. I write this post to encourage others to do the same by > spending a few minutes to look for any vulnerabilities and spend a few days > addressing them. Or at least upgrading insurance. For many here in Boulder > lately there is nothing they could have done, but for amny other a few > minutes could have saved them months of work. If I can help just one Time-Nut > save his la b > it is worth it. For those that have not been in Boulder, you should realize that it is just downhill from the mountains. Multiple small creeks run through Boulder as the rain poors off the Rocky Mountains, like the Flatirons that dominate the view of Boulder. Boulder really stops at the Rocky Mountains. Tom's house has one of those smaller creeks just behind it. Having seen his basement, and knowing the other opportunities, it is not strange that he take precaution. Having seen the lovely display of thundering just outside Boulder, I know what that means. Good to hear you coped OK-ish with it. > Now for the good stuff, We all have our idea of what a low or Ultra Low > phase noise oscillator is. For 5 and 10MHz references I usually > look first at 1Hz offset then the noise floor. At 5MHz I > consider 125dB @ 1Hz state of the art. But now > Arcihita Hati and colleges at NIST has designed a State-of-the-Art RF > Signal Generation From Optical Frequency Division that sets a new standard > for low phase noise with nearly -155dB @ 1Hz for a 5MHz reference. All I want > to know is when will it be available as a > single chip. And how long before Magnus, TVB, and other Senior > Time-Nut have a workable prototype in their labs? The NIST link is > not yet active, but if you would like a copy of the paper now email me off > list I will send you the paper as an attachment. I think it may also be > posted on IEEE's pay to play site. Giveme :) Cheers, Magnus ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Reflections and Low Phase Noise
Tom: I would like to see that paper. Thanks, jim wb4...@amsat.org On 9/21/2013 1:50 PM, Tom Knox wrote: If this at first appears to be off topic read on. Having this year survived fire evacuations and most recently what has been called anything from a five to 1000 year flood here in Boulder, I have has a little time to reflect on just how lucky I was. Over the last few years I have made a few upgrades to harden my home against natural disasters. Adding sprinklers to the roof and a industrial sump pump in my basement. To say the least it paid off in a big way last week, since if my basement had flooded I would have lost my lab that I have spent several decades building. It has motivated me to finish upgrading my grounding and lightning protection with a new eye to detail. I write this post to encourage others to do the same by spending a few minutes to look for any vulnerabilities and spend a few days addressing them. Or at least upgrading insurance. For many here in Boulder lately there is nothing they could have done, but for amny other a few minutes could have saved them months of work. If I can help just one Time-Nut save! his lab it is worth it. Now for the good stuff, We all have our idea of what a low or Ultra Low phase noise oscillator is. For 5 and 10MHz references I usually look first at 1Hz offset then the noise floor. At 5MHz I consider 125dB @ 1Hz state of the art. But now Arcihita Hati and colleges at NIST has designed a State-of-the-Art RF Signal Generation From Optical Frequency Division that sets a new standard for low phase noise with nearly -155dB @ 1Hz for a 5MHz reference. All I want to know is when will it be available as a single chip. And how long before Magnus, TVB, and other Senior Time-Nut have a workable prototype in their labs? The NIST link is not yet active, but if you would like a copy of the paper now email me off list I will send you the paper as an attachment. I think it may also be posted on IEEE's pay to play site. Thomas Knox ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
