My apartment is in a reinforced concrete building, not near the roof. Many years ago I tried a Garmin handheld and could not get a lock. Recently, I tried a GPS watch near the window, and could not get e lock, even though it did lock up outside(cold) after a few minutes. that is why i do not think I can use a GPS disciplining option. Since my unit already gets no worse than 1 millisecond when locked up, i would want no worse than 1 microsecond in phase over long periods of time. What non GPS options are there with the electronic building skills I do not have? > > > ------------------------------ > > Message: 6 > Date: Fri, 14 Dec 2007 20:34:59 -0500 > From: "Ronald Held" <[EMAIL PROTECTED]> > Subject: [time-nuts] Upgrading possibilities for more accurate, > precise stable mark ii > To: [email protected] > Message-ID: > <[EMAIL PROTECTED]> > Content-Type: text/plain; charset=ISO-8859-1 > > Greetings: > I do not know how to properly add to a thread, so I am resubmitting > this I do not have the necessary circuit skills, so i would have to > buy preassembled components. I have a > Endrun Precis Cf OCXO discipline via CDMA signals, which go into a display > unit driven by a STAMP microprocessor(AFAIK, since Bob build and > programmed it. > Given that I cannot receive GPS signals in my apartment, what are my options? > Is it to go to a Rb/Cs standard and counter? if that is so how do I > periodically sync up with a more accurate time source? > Ronald > > > > ------------------------------ > > Message: 7 > Date: Fri, 14 Dec 2007 17:55:50 -0800 > From: "Michael Scheliga" <[EMAIL PROTECTED]> > Subject: Re: [time-nuts] Upgrading possibilities for more accurate, > precise stable mark ii > To: "Discussion of precise time and frequency measurement" > <[email protected]> > Message-ID: > <[EMAIL PROTECTED]> > Content-Type: text/plain; charset="us-ascii" > > > > > -----Original Message----- > > From: [EMAIL PROTECTED] [mailto:time-nuts- > > [EMAIL PROTECTED] On Behalf Of Ronald Held > > Sent: Friday, December 14, 2007 5:35 PM > > To: [email protected] > > Subject: [time-nuts] Upgrading possibilities for more > > accurate,precise stable mark ii > > > > Greetings: > > I do not know how to properly add to a thread, so I am > > resubmitting > > this I do not have the necessary circuit skills, so i would have to > > buy preassembled components. I have a > > Endrun Precis Cf OCXO discipline via CDMA signals, which go into a > > display > > unit driven by a STAMP microprocessor(AFAIK, since Bob build and > > programmed it. > > Given that I cannot receive GPS signals in my apartment, what are > > my options? > > Is it to go to a Rb/Cs standard and counter? if that is so how do I > > periodically sync up with a more accurate time source? > > Ronald > > > > _______________________________________________ > > 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. > > What are you trying to accomplish? The Praecis Cf has 10MHz out as well > > as ASCII time on rs232 according to specs. So you could take the RS-232 > > time data into a PC if this is what you're trying to do. > > If you want to do more you could build something similar to the Soekris > net4501 that John has on his page http://www.febo.com/pages/soekris/ > > This is actually what I'm in the middle of building and how I found out > about this list. > > Lots of info on this project on PHK's pages and others. > > Mike > > > > ------------------------------ > > Message: 8 > Date: Fri, 14 Dec 2007 20:58:06 -0500 > From: "John Franke" <[EMAIL PROTECTED]> > Subject: Re: [time-nuts] Upgrading possibilities for more accurate, > precise stable mark ii > To: "Discussion of precise time and frequency measurement" > <[email protected]> > Message-ID: <[EMAIL PROTECTED]> > Content-Type: text/plain; format=flowed; charset="iso-8859-1"; > reply-type=original > > Are you positive there are no locations at your apartment that can receive > GPS. I live in an apartment and can get suitable signals with hockey puck > antennas mounted on four-inch square ground planes placed in various > windows. The ground planes are horizontal. I thought about tilting the > ground planes, but too much thermal ground noise is received. > > John WA4WDL > > ----- Original Message ----- > From: "Ronald Held" <[EMAIL PROTECTED]> > To: <[email protected]> > Sent: Friday, December 14, 2007 8:34 PM > Subject: [time-nuts] Upgrading possibilities for more accurate,precise > stable mark ii > > > > Greetings: > > I do not know how to properly add to a thread, so I am resubmitting > > this I do not have the necessary circuit skills, so i would have to > > buy preassembled components. I have a > > Endrun Precis Cf OCXO discipline via CDMA signals, which go into a display > > unit driven by a STAMP microprocessor(AFAIK, since Bob build and > > programmed it. > > Given that I cannot receive GPS signals in my apartment, what are my > > options? > > Is it to go to a Rb/Cs standard and counter? if that is so how do I > > periodically sync up with a more accurate time source? > > Ronald > > > > _______________________________________________ > > 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. > > > > > > > > ------------------------------ > > Message: 9 > Date: Fri, 14 Dec 2007 21:01:01 -0500 > From: "John Franke" <[EMAIL PROTECTED]> > Subject: Re: [time-nuts] Upgrading possibilities for more accurate, > precise stable mark ii > To: "Discussion of precise time and frequency measurement" > <[email protected]> > Message-ID: <[EMAIL PROTECTED]> > Content-Type: text/plain; format=flowed; charset="iso-8859-1"; > reply-type=original > > The GPS 1PPS signal could be received at a clear site and transmitted to > your apartment. > > Have you considered CHU or WWV or WWVB? > > John WA4WDL > > > ----- Original Message ----- > From: "Ronald Held" <[EMAIL PROTECTED]> > To: <[email protected]> > Sent: Friday, December 14, 2007 8:34 PM > Subject: [time-nuts] Upgrading possibilities for more accurate,precise > stable mark ii > > > > Greetings: > > I do not know how to properly add to a thread, so I am resubmitting > > this I do not have the necessary circuit skills, so i would have to > > buy preassembled components. I have a > > Endrun Precis Cf OCXO discipline via CDMA signals, which go into a display > > unit driven by a STAMP microprocessor(AFAIK, since Bob build and > > programmed it. > > Given that I cannot receive GPS signals in my apartment, what are my > > options? > > Is it to go to a Rb/Cs standard and counter? if that is so how do I > > periodically sync up with a more accurate time source? > > Ronald > > > > _______________________________________________ > > 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. > > > > > > > > ------------------------------ > > Message: 10 > Date: Fri, 14 Dec 2007 21:42:37 -0800 > From: Hal Murray <[EMAIL PROTECTED]> > Subject: Re: [time-nuts] Upgrading possibilities for more accurate, > precise stable mark ii > To: Discussion of precise time and frequency measurement > <[email protected]> > Message-ID: <[EMAIL PROTECTED]> > Content-Type: text/plain; charset=us-ascii > > > > Are you positive there are no locations at your apartment that can > > receive GPS. I live in an apartment and can get suitable signals > > with hockey puck antennas mounted on four-inch square ground planes > > placed in various windows. The ground planes are horizontal. I > > thought about tilting the ground planes, but too much thermal ground > > noise is received. > > I was going to make a similar suggestion. > > I live in a simple one story house. GPS reception is right on the edge. > > The SiRF Star-III units work anyplace. They may take a long time to lock up. > Their NMEA text is poor for timekeeping. I haven't checked the PPS yet. > > The previous generation, including the Garmin GPS 18 and SiRF Star-II, just > barely work most of the time if I put them up on the top of the window. > > I haven't tried next to the glass. > > > -- > These are my opinions, not necessarily my employer's. I hate spam. > > > >
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