Re: [time-nuts] GPS with 10KHz output
Hi The biggest issue is sawtooth correction. To take care of the sawtooth issues you need to sync up the correction data with the signal into the GPSDO. That's a lot easier when both come out once a second than when one is continuous and the other is still only once a second. Bob On Sep 20, 2013, at 2:27 AM, Anthony Stirk wrote: > Just as a note you can reconfigure the time pulse output any of the Ublox > modules (doesn't have to be the timing module) via commands to give out a > pulse up to : > > 7 Series :0.25 Hz … 10 MHz > NEO-6G/Q/M/P/V : 0.25 Hz to 1 kHz > NEO-6T :0.25 Hz to 10 MHz > > Don't know if this helps anyone. > > Cheers, > > Anthony > > > > > On Fri, Sep 20, 2013 at 3:24 AM, Bill Reed wrote: > >> Hi Merv, >> >> Thanks. I will try one. >> >> This is a great group! >> >> Bill >> >> >> -----Original Message- From: Merv Thomas >> Sent: Thursday, September 19, 2013 9:01 PM >> To: time-nuts@febo.com >> >> Subject: Re: [time-nuts] GPS with 10KHz output >> >> Hi Bill, >> >> I have a number of these modules purchased from the particular eBay source >> you gave a link for. They work well but I never found a way to keep their >> data output as NMEA as they seem to revert to Binary on power down. >> However >> if it is just the 10KHz output you want from them or their Binary data >> stream they should be fine in my humble opinion. I have a small batch file >> that commands them into NMEA once powered up but nothing to save this >> setting. >> >> Merv VK6BMT >> >> __**_ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to https://www.febo.com/cgi-bin/** >> mailman/listinfo/time-nuts<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<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. ___ 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] GPS with 10KHz output
Additional information : The Ublox NEO-6T divides their internal 48MHz clock down so 10Mhz doesn't divide correctly and is jittery but 8Mhz is fine. Anthony On Fri, Sep 20, 2013 at 7:27 AM, Anthony Stirk wrote: > Just as a note you can reconfigure the time pulse output any of the Ublox > modules (doesn't have to be the timing module) via commands to give out a > pulse up to : > > 7 Series :0.25 Hz … 10 MHz > NEO-6G/Q/M/P/V : 0.25 Hz to 1 kHz > NEO-6T :0.25 Hz to 10 MHz > > Don't know if this helps anyone. > > Cheers, > > Anthony > > > > > On Fri, Sep 20, 2013 at 3:24 AM, Bill Reed wrote: > >> Hi Merv, >> >> Thanks. I will try one. >> >> This is a great group! >> >> Bill >> >> >> -----Original Message----- From: Merv Thomas >> Sent: Thursday, September 19, 2013 9:01 PM >> To: time-nuts@febo.com >> >> Subject: Re: [time-nuts] GPS with 10KHz output >> >> Hi Bill, >> >> I have a number of these modules purchased from the particular eBay source >> you gave a link for. They work well but I never found a way to keep their >> data output as NMEA as they seem to revert to Binary on power down. >> However >> if it is just the 10KHz output you want from them or their Binary data >> stream they should be fine in my humble opinion. I have a small batch >> file >> that commands them into NMEA once powered up but nothing to save this >> setting. >> >> Merv VK6BMT >> >> __**_ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to https://www.febo.com/cgi-bin/** >> mailman/listinfo/time-nuts<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<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] GPS with 10KHz output
Just as a note you can reconfigure the time pulse output any of the Ublox modules (doesn't have to be the timing module) via commands to give out a pulse up to : 7 Series :0.25 Hz … 10 MHz NEO-6G/Q/M/P/V : 0.25 Hz to 1 kHz NEO-6T :0.25 Hz to 10 MHz Don't know if this helps anyone. Cheers, Anthony On Fri, Sep 20, 2013 at 3:24 AM, Bill Reed wrote: > Hi Merv, > > Thanks. I will try one. > > This is a great group! > > Bill > > > -Original Message- From: Merv Thomas > Sent: Thursday, September 19, 2013 9:01 PM > To: time-nuts@febo.com > > Subject: Re: [time-nuts] GPS with 10KHz output > > Hi Bill, > > I have a number of these modules purchased from the particular eBay source > you gave a link for. They work well but I never found a way to keep their > data output as NMEA as they seem to revert to Binary on power down. > However > if it is just the 10KHz output you want from them or their Binary data > stream they should be fine in my humble opinion. I have a small batch file > that commands them into NMEA once powered up but nothing to save this > setting. > > Merv VK6BMT > > __**_ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/** > mailman/listinfo/time-nuts<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<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] GPS with 10KHz output
Hi Merv, Thanks. I will try one. This is a great group! Bill -Original Message- From: Merv Thomas Sent: Thursday, September 19, 2013 9:01 PM To: time-nuts@febo.com Subject: Re: [time-nuts] GPS with 10KHz output Hi Bill, I have a number of these modules purchased from the particular eBay source you gave a link for. They work well but I never found a way to keep their data output as NMEA as they seem to revert to Binary on power down. However if it is just the 10KHz output you want from them or their Binary data stream they should be fine in my humble opinion. I have a small batch file that commands them into NMEA once powered up but nothing to save this setting. Merv VK6BMT ___ 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] GPS with 10KHz output
Hi Bill, I have a number of these modules purchased from the particular eBay source you gave a link for. They work well but I never found a way to keep their data output as NMEA as they seem to revert to Binary on power down. However if it is just the 10KHz output you want from them or their Binary data stream they should be fine in my humble opinion. I have a small batch file that commands them into NMEA once powered up but nothing to save this setting. Merv VK6BMT ___ 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] GPS with 10KHz output
Hi Based on the plot shown, the GPS is doing about 2x10^-12 at 1,000 seconds. That translates to roughly 2 ns at one second. The newer timing receivers can get down to about 4 to 5X better than that. Bob On Sep 19, 2013, at 8:02 AM, Erno Peres wrote: > > Bob, > > please have a look to the flwng link. about the stability.. > > http://www.jrmiller.demon.co.uk/projects/ministd/stab.htm > > Rgds Ernie. > > > > > -Original Message- > From: Bob Camp > To: Discussion of precise time and frequency measurement > Sent: Thu, Sep 19, 2013 1:21 pm > Subject: Re: [time-nuts] GPS with 10KHz output > > > Hi > It's not the best thing to use. Since the 10 KHz jumps once a second, it's > not > eally very useful. The GPS it's self is not as well optimized for timing > pplications as a UT or a LEA-(any number) T. At auction prices, the GPS isn't > oing to be the major cost item in your GPSDO. Better to get a good one. > Bob > On Sep 18, 2013, at 10:21 PM, "Bill Reed" wrote: >> Hi, > > Does anyone know the suitability of this module for GPSDO ? > > I am new to the group. > > Thanks, > > Bill R > > > http://www.ebay.com/itm/Navman-jupiter-T-Tu60-GPS-Kit-1pps-10khz-GPS-Module-/260790984470?pt=US_Ham_Radio_Amplifiers&hash=item3cb85a9f16 > ___ > 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. > ___ > ime-nuts mailing list -- time-nuts@febo.com > o unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > nd 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. ___ 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] GPS with 10KHz output
Hi, I may have missed something back then, but I don't recall any description of exactly how it was generated - more a discussion of what the manuals/datasheets meant. Angus From: "Bruce Griffiths" To: "Discussion of precise time and frequency measurement" Sent: September 19, 2013 8:22 AM Subject: Re: [time-nuts] GPS with 10KHz output Hal Murray wrote: > albertson.ch...@gmail.com said: > >> If you ned the 10KHz, Jupiter is one that has been used. I think a 10KHz >> GPS will make your GPSDO converge quickly ... >> > Does the 10KHz signal change smoothly or does it jump to a new value once per > second? > > Has anybody looked at the fine print? What sort of ADEV is there on the 10 > KHz signal? > > > > It jumps. We discussed this several months/years ago. Bruce ___ 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] GPS with 10KHz output
Bob, please have a look to the flwng link. about the stability.. http://www.jrmiller.demon.co.uk/projects/ministd/stab.htm Rgds Ernie. -Original Message- From: Bob Camp To: Discussion of precise time and frequency measurement Sent: Thu, Sep 19, 2013 1:21 pm Subject: Re: [time-nuts] GPS with 10KHz output Hi It's not the best thing to use. Since the 10 KHz jumps once a second, it's not eally very useful. The GPS it's self is not as well optimized for timing pplications as a UT or a LEA-(any number) T. At auction prices, the GPS isn't oing to be the major cost item in your GPSDO. Better to get a good one. Bob On Sep 18, 2013, at 10:21 PM, "Bill Reed" wrote: > Hi, Does anyone know the suitability of this module for GPSDO ? I am new to the group. Thanks, Bill R http://www.ebay.com/itm/Navman-jupiter-T-Tu60-GPS-Kit-1pps-10khz-GPS-Module-/260790984470?pt=US_Ham_Radio_Amplifiers&hash=item3cb85a9f16 ___ 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. ___ ime-nuts mailing list -- time-nuts@febo.com o unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts nd 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] GPS with 10KHz output
Hi It's not the best thing to use. Since the 10 KHz jumps once a second, it's not really very useful. The GPS it's self is not as well optimized for timing applications as a UT or a LEA-(any number) T. At auction prices, the GPS isn't going to be the major cost item in your GPSDO. Better to get a good one. Bob On Sep 18, 2013, at 10:21 PM, "Bill Reed" wrote: > Hi, > > Does anyone know the suitability of this module for GPSDO ? > > I am new to the group. > > Thanks, > > Bill R > > > http://www.ebay.com/itm/Navman-jupiter-T-Tu60-GPS-Kit-1pps-10khz-GPS-Module-/260790984470?pt=US_Ham_Radio_Amplifiers&hash=item3cb85a9f16 > ___ > 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] GPS with 10KHz output
On 9/19/2013 5:33 AM, Chris Albertson wrote: But 10KHz does allow a simpler design for the GPSDO that can be done 100% analog A very simple, full analog, GPSDO that exploits the 10 kHz from a Jupiter GPS receiver can be found here : http://gpsdo.i2phd.com/ 73 Alberto I2PHD ___ 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] GPS with 10KHz output
Hal Murray wrote: albertson.ch...@gmail.com said: If you ned the 10KHz, Jupiter is one that has been used. I think a 10KHz GPS will make your GPSDO converge quickly ... Does the 10KHz signal change smoothly or does it jump to a new value once per second? Has anybody looked at the fine print? What sort of ADEV is there on the 10 KHz signal? It jumps. We discussed this several months/years ago. Bruce ___ 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] GPS with 10KHz output
albertson.ch...@gmail.com said: > If you ned the 10KHz, Jupiter is one that has been used. I think a 10KHz > GPS will make your GPSDO converge quickly ... Does the 10KHz signal change smoothly or does it jump to a new value once per second? Has anybody looked at the fine print? What sort of ADEV is there on the 10 KHz signal? -- 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] GPS with 10KHz output
If you ned the 10KHz, Jupiter is one that has been used. I think a 10KHz GPS will make your GPSDO converge quickly but for long term use a 1Hz GPS works as well and will be easier t replace years from now. Also a 1HZ GPS with about equivalent performance is MUCH less expensive (see ebay 271152854221 which is $15)But 10KHz does allow a simpler design for the GPSDO that can be done 100% analog On Wed, Sep 18, 2013 at 7:21 PM, Bill Reed wrote: > Hi, > > Does anyone know the suitability of this module for GPSDO ? > > I am new to the group. > > Thanks, > > Bill R > > > > http://www.ebay.com/itm/Navman-jupiter-T-Tu60-GPS-Kit-1pps-10khz-GPS-Module-/260790984470?pt=US_Ham_Radio_Amplifiers&hash=item3cb85a9f16 > ___ > 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. -- Chris Albertson Redondo Beach, California ___ 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.
