Re: [time-nuts] Z3805 hold-Over
Hi Chuck, Thank you for the explanation of the SS and C/N modes used in the Z3805A, I hadn't noticed the change in designation on the receiver status. This totally explains the difference in signal reports between my Z3801 Z3805. Sometimes you can't see the wood for the trees. With this in mind, it looks like my Z3805 GPS is receiving an acceptable signal with a typical CF of 40+, so back to the drawing board. Or better still, just leave the Z3805A alone for a month or so and let everything settle and then if neccesary, investigate further. thanks Doug From: BD Systems Inc. bdsy...@yahoo.com To: time-nuts@febo.com time-nuts@febo.com Sent: Sunday, 11 November 2012, 22:58 Subject: [time-nuts] Z3805 hold-Over The Z3805A utilizes Carrier to Noise C/N instead of Signal Strength. Typical values of C/N are 25 - 55 whereas Signal Strength can range from ~30 - 255. Chuck Zabilski BD Systems, Inc. From: time-nuts-requ...@febo.com time-nuts-requ...@febo.com To: time-nuts@febo.com Sent: Sunday, November 11, 2012 1:53 PM Subject: time-nuts Digest, Vol 100, Issue 38 Send time-nuts mailing list submissions to time-nuts@febo.com To subscribe or unsubscribe via the World Wide Web, visit https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts or, via email, send a message with subject or body 'help' to time-nuts-requ...@febo.com You can reach the person managing the list at time-nuts-ow...@febo.com When replying, please edit your Subject line so it is more specific than Re: Contents of time-nuts digest... Today's Topics: 1. Re: Z3805 hold-Over (jmfranke) 2. Re: Z3805 hold-Over (Doug Parker) 3. Re: Z3805 hold-Over (Volker Esper) 4. Re: Z3805 hold-Over (Volker Esper) 5. Re: Z3805 hold-Over (Bob Camp) 6. Re: Z3805 hold-Over (Bob Camp) -- Message: 1 Date: Sun, 11 Nov 2012 14:04:15 -0500 From: jmfranke jmfra...@cox.net To: Doug Parker doug.par...@btinternet.com, time-nuts@febo.com Subject: Re: [time-nuts] Z3805 hold-Over Message-ID: DC6BAEDBFD0747039B478B94F2E3A837@Franke Content-Type: text/plain; format=flowed; charset=iso-8859-1; reply-type=original Your 21 ns for 1PPS and T1 does not look too bad, but the satellite received signal strengths are too low. You should have at least four or five SS values above 60-80. I always have at least three SS readings above 100. My Holdover runs between 03 and 4 microseconds. John WA4WDL -- From: Doug Parker doug.par...@btinternet.com Sent: Sunday, November 11, 2012 1:36 PM To: time-nuts@febo.com Subject: Re: [time-nuts] Z3805 hold-Over Hi, I've got a Z3805 from one of the Chineese sources and had problems with the HP 11801 oscillator which came with it. Even after a couple of weeks operartion it was moving vast EFC voltages with the 'Holdover Uncertainty Predict' reaching a lowest of 19uS. So I tried the HP oscillator from my Z3801 in the Z3805 and the daily EFC change is back to a resonable level, but after 5 days of settling down, the 'Holdeover Uncertainy Predict' has only got down to 10uS.and is holding about that value. Could some one please advise what figures they are getting. As there's something sticking in my mind that the whole system should be lower than 6.3uS after 3 days of locked operation. Or have I been dreaming. I have attached a JPG of my GPSCon graph, hope it helps thanks 73s Doug G4DZU http://www.g4dzu.com/ ___ 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. -- Message: 2 Date: Sun, 11 Nov 2012 19:24:20 + (GMT) From: Doug Parker doug.par...@btinternet.com To: jmfranke jmfra...@cox.net, time-nuts@febo.com time-nuts@febo.com Subject: Re: [time-nuts] Z3805 hold-Over Message-ID: 1352661860.17054.yahoomail...@web87704.mail.ir2.yahoo.com Content-Type: text/plain; charset=iso-8859-1 Hi John, ? Thanks for the observation, with the same antenna plugged into my Z3801, I get an SS of at least 90. ? I'll place a preamp in line to see if that increases the SS on the 3805 , maybe my problem is the GPS RX isn't well. Great point. ? Of course, ?I'll watch out for the 5V power feed going up the coax for the preamp in the antenna. ? 73s Doug G4DZU From: jmfranke jmfra...@cox.net To: Doug Parker doug.par...@btinternet.com; time-nuts@febo.com Sent: Sunday, 11 November 2012, 19:04 Subject: Re: [time-nuts] Z3805 hold-Over Your 21 ns for 1PPS and T1 does not look too bad, but the satellite received signal strengths are too low. You should have at least four or five SS values above 60-80. I always have at least three SS readings above
Re: [time-nuts] Z3805 hold-Over
Hi Bob, Thanks for the thoughts, Chuck has provided the wisdom to solve my problem. With GPSCon, my readings on the Z3801 are 'Signal Strength' and the Z3805A are 'C/N' which are entirely different. I'd not noticed the change in designation on the display. My antenna is a typical 'Base Station bullet' with an integral 20+dB preamp and 15 feet of RG58 thanks Doug From: Bob Camp li...@rtty.us To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Sunday, 11 November 2012, 20:52 Subject: Re: [time-nuts] Z3805 hold-Over Hi You may well over drive the GPS board if you put more amplification in the line. If the antenna and coax work ok with a 3801, they should be fine with a 3805. If you have a very high gain setup, it may be ok for the 3801 and be over driving the 3805 already. What kind of antenna and coax are you using? Bob On Nov 11, 2012, at 2:24 PM, Doug Parker doug.par...@btinternet.com wrote: Hi John, Thanks for the observation, with the same antenna plugged into my Z3801, I get an SS of at least 90. I'll place a preamp in line to see if that increases the SS on the 3805 , maybe my problem is the GPS RX isn't well. Great point. Of course, I'll watch out for the 5V power feed going up the coax for the preamp in the antenna. 73s Doug G4DZU From: jmfranke jmfra...@cox.net To: Doug Parker doug.par...@btinternet.com; time-nuts@febo.com Sent: Sunday, 11 November 2012, 19:04 Subject: Re: [time-nuts] Z3805 hold-Over Your 21 ns for 1PPS and T1 does not look too bad, but the satellite received signal strengths are too low. You should have at least four or five SS values above 60-80. I always have at least three SS readings above 100. My Holdover runs between 03 and 4 microseconds. John WA4WDL -- From: Doug Parker doug.par...@btinternet.com Sent: Sunday, November 11, 2012 1:36 PM To: time-nuts@febo.com Subject: Re: [time-nuts] Z3805 hold-Over Hi, I've got a Z3805 from one of the Chineese sources and had problems with the HP 11801 oscillator which came with it. Even after a couple of weeks operartion it was moving vast EFC voltages with the 'Holdover Uncertainty Predict' reaching a lowest of 19uS. So I tried the HP oscillator from my Z3801 in the Z3805 and the daily EFC change is back to a resonable level, but after 5 days of settling down, the 'Holdeover Uncertainy Predict' has only got down to 10uS.and is holding about that value. Could some one please advise what figures they are getting. As there's something sticking in my mind that the whole system should be lower than 6.3uS after 3 days of locked operation. Or have I been dreaming. I have attached a JPG of my GPSCon graph, hope it helps thanks 73s Doug G4DZU http://www.g4dzu.com/ ___ 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. ___ 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] Z3805 hold-Over
Hi If the coax is real RG58 (as in solid poly core) you have 3-4 db of loss in it. If it's foam core, you have even less. The normal antennas have enough gain to easily handle 10 - 15 db of loss. A bigger concern than loss would be shielding. Depending on what's running around (moon bounce transmitters …), something like quad shield RG-6 might do better. Bob On Nov 12, 2012, at 4:28 AM, Doug Parker doug.par...@btinternet.com wrote: Hi Bob, Thanks for the thoughts, Chuck has provided the wisdom to solve my problem. With GPSCon, my readings on the Z3801 are 'Signal Strength' and the Z3805A are 'C/N' which are entirely different. I'd not noticed the change in designation on the display. My antenna is a typical 'Base Station bullet' with an integral 20+dB preamp and 15 feet of RG58 thanks Doug From: Bob Camp li...@rtty.us To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Sunday, 11 November 2012, 20:52 Subject: Re: [time-nuts] Z3805 hold-Over Hi You may well over drive the GPS board if you put more amplification in the line. If the antenna and coax work ok with a 3801, they should be fine with a 3805. If you have a very high gain setup, it may be ok for the 3801 and be over driving the 3805 already. What kind of antenna and coax are you using? Bob On Nov 11, 2012, at 2:24 PM, Doug Parker doug.par...@btinternet.com wrote: Hi John, Thanks for the observation, with the same antenna plugged into my Z3801, I get an SS of at least 90. I'll place a preamp in line to see if that increases the SS on the 3805 , maybe my problem is the GPS RX isn't well. Great point. Of course, I'll watch out for the 5V power feed going up the coax for the preamp in the antenna. 73s Doug G4DZU From: jmfranke jmfra...@cox.net To: Doug Parker doug.par...@btinternet.com; time-nuts@febo.com Sent: Sunday, 11 November 2012, 19:04 Subject: Re: [time-nuts] Z3805 hold-Over Your 21 ns for 1PPS and T1 does not look too bad, but the satellite received signal strengths are too low. You should have at least four or five SS values above 60-80. I always have at least three SS readings above 100. My Holdover runs between 03 and 4 microseconds. John WA4WDL -- From: Doug Parker doug.par...@btinternet.com Sent: Sunday, November 11, 2012 1:36 PM To: time-nuts@febo.com Subject: Re: [time-nuts] Z3805 hold-Over Hi, I've got a Z3805 from one of the Chineese sources and had problems with the HP 11801 oscillator which came with it. Even after a couple of weeks operartion it was moving vast EFC voltages with the 'Holdover Uncertainty Predict' reaching a lowest of 19uS. So I tried the HP oscillator from my Z3801 in the Z3805 and the daily EFC change is back to a resonable level, but after 5 days of settling down, the 'Holdeover Uncertainy Predict' has only got down to 10uS.and is holding about that value. Could some one please advise what figures they are getting. As there's something sticking in my mind that the whole system should be lower than 6.3uS after 3 days of locked operation. Or have I been dreaming. I have attached a JPG of my GPSCon graph, hope it helps thanks 73s Doug G4DZU http://www.g4dzu.com/ ___ 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. ___ 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. ___ 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] WWVB not psk modulated over the weekend and d-psk-r update
Hello to the group. A very brief update. WWVB was not psk modulated all weekend. But starting on Thursday I was able to run the d-psk-r using a spectracom 8163 and it does indeed work here on the east coast. I want to get a bit more time under the belt. If the PSK had run all weekend I would have more confidence. I have a document written that I will share on how I am doing it. There are numbers of other approaches. But it looks like this one does work for at least 1.5 days. The other approach being worked on is a pure costas loop. Thats been slow. Not because its hard just time to do it. Lastly there has to be some very different approaches to this such as a purely digital correction. Sort of a digital delay lock loop were you trigger on the edge sync a non synchronous higher frequency clock and count cycles looking for an incoming phase shift. Just not enough time in the day. Regards Paul. ___ 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] SR620 software and adjustment
Sorry, I don't want to annoy you, but I can't find the alignment/adjustment procedure for the SR620 - once, I had it... :-( I don's mean that in the manual, there must be another one Bob talked about. By the way: is there any suitable vindous software out there, for talking (and listening) to the SR620 via RS-232? A program like Ulrichs Z38xx would be nice... Thanks a lot and please don't be annoyed - I guess this kind of question is not very inspiring. Volker ___ 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] Phase Shifter
Does anybody have any knowledge of these beasts? I just bought a Vectronics DP 638.8 RF phase shifter for a project. Wondering if anyone has an idea of pinout/operation. I cant find a datasheet or anything on it. it appears to be a 24-30 volt and have 3 different frequency ranges dc-3GHz, 3-8 GHz, and 8-12.4 GHz.. -- Doc Bill Dailey KXØO ___ 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] SR620 software and adjustment
Hi The only place I have seen a really good description of the full blown alignment procedure for the SR620 is here on the list. It's in the archives Bob -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Volker Esper Sent: Monday, November 12, 2012 11:06 AM To: Discussion of precise time and frequency measurement Subject: [time-nuts] SR620 software and adjustment Sorry, I don't want to annoy you, but I can't find the alignment/adjustment procedure for the SR620 - once, I had it... :-( I don's mean that in the manual, there must be another one Bob talked about. By the way: is there any suitable vindous software out there, for talking (and listening) to the SR620 via RS-232? A program like Ulrichs Z38xx would be nice... Thanks a lot and please don't be annoyed - I guess this kind of question is not very inspiring. Volker ___ 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] SR620 software and adjustment
Volker: This is the adjustment procedure that I used: Use the following adjustment sequence to get the frequency spot on: 1. Set the Cal jumper to Cal Enable 2. Connect the reference to Ext Ref (rear) and Input A 3. Switch the counter to Ext Ref 4. Set the CalByte 50 for the best display (this is a very fine adjustement) 5. Switch the counter to Int Ref 6. Set the CalByte 4 for the best display (this adjustement is coarse, optimize!) 7. Set the Cal jumper to Cal Disable The procedure can be found in the list archives and at Brooke Clarke's website at: http://www.prc68.com/I/TandFTE.shtml -Eric On Mon, Nov 12, 2012 at 8:05 AM, Volker Esper ail...@t-online.de wrote: Sorry, I don't want to annoy you, but I can't find the alignment/adjustment procedure for the SR620 - once, I had it... :-( I don's mean that in the manual, there must be another one Bob talked about. By the way: is there any suitable vindous software out there, for talking (and listening) to the SR620 via RS-232? A program like Ulrichs Z38xx would be nice... Thanks a lot and please don't be annoyed - I guess this kind of question is not very inspiring. Volker ___ 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. -- --Eric _ Eric Garner ___ 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] SR620 software and adjustment Ref queston
In step 2 is this my Lab Ref, or the SR620 ref out that is put into Ext Ref and Input A ? Thomas Knox Date: Mon, 12 Nov 2012 09:52:13 -0800 From: garn...@gmail.com To: time-nuts@febo.com Subject: Re: [time-nuts] SR620 software and adjustment Volker: This is the adjustment procedure that I used: Use the following adjustment sequence to get the frequency spot on: 1. Set the Cal jumper to Cal Enable 2. Connect the reference to Ext Ref (rear) and Input A 3. Switch the counter to Ext Ref 4. Set the CalByte 50 for the best display (this is a very fine adjustement) 5. Switch the counter to Int Ref 6. Set the CalByte 4 for the best display (this adjustement is coarse, optimize!) 7. Set the Cal jumper to Cal Disable The procedure can be found in the list archives and at Brooke Clarke's website at: http://www.prc68.com/I/TandFTE.shtml -Eric On Mon, Nov 12, 2012 at 8:05 AM, Volker Esper ail...@t-online.de wrote: Sorry, I don't want to annoy you, but I can't find the alignment/adjustment procedure for the SR620 - once, I had it... :-( I don's mean that in the manual, there must be another one Bob talked about. By the way: is there any suitable vindous software out there, for talking (and listening) to the SR620 via RS-232? A program like Ulrichs Z38xx would be nice... Thanks a lot and please don't be annoyed - I guess this kind of question is not very inspiring. Volker ___ 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. -- --Eric _ Eric Garner ___ 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] SR620 software and adjustment Ref queston
the reference in step 2 is the best reference you own, not the internal ref. sorry for the confusion. -eric On Mon, Nov 12, 2012 at 9:59 AM, Tom Knox act...@hotmail.com wrote: In step 2 is this my Lab Ref, or the SR620 ref out that is put into Ext Ref and Input A ? Thomas Knox Date: Mon, 12 Nov 2012 09:52:13 -0800 From: garn...@gmail.com To: time-nuts@febo.com Subject: Re: [time-nuts] SR620 software and adjustment Volker: This is the adjustment procedure that I used: Use the following adjustment sequence to get the frequency spot on: 1. Set the Cal jumper to Cal Enable 2. Connect the reference to Ext Ref (rear) and Input A 3. Switch the counter to Ext Ref 4. Set the CalByte 50 for the best display (this is a very fine adjustement) 5. Switch the counter to Int Ref 6. Set the CalByte 4 for the best display (this adjustement is coarse, optimize!) 7. Set the Cal jumper to Cal Disable The procedure can be found in the list archives and at Brooke Clarke's website at: http://www.prc68.com/I/TandFTE.shtml -Eric On Mon, Nov 12, 2012 at 8:05 AM, Volker Esper ail...@t-online.de wrote: Sorry, I don't want to annoy you, but I can't find the alignment/adjustment procedure for the SR620 - once, I had it... :-( I don's mean that in the manual, there must be another one Bob talked about. By the way: is there any suitable vindous software out there, for talking (and listening) to the SR620 via RS-232? A program like Ulrichs Z38xx would be nice... Thanks a lot and please don't be annoyed - I guess this kind of question is not very inspiring. Volker ___ 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. -- --Eric _ Eric Garner ___ 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. -- --Eric _ Eric Garner ___ 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] SR620 software and adjustment Ref queston
This is your Lab Ref Juerg Koegel 2012/11/12 Tom Knox act...@hotmail.com: In step 2 is this my Lab Ref, or the SR620 ref out that is put into Ext Ref and Input A ? Thomas Knox Date: Mon, 12 Nov 2012 09:52:13 -0800 From: garn...@gmail.com To: time-nuts@febo.com Subject: Re: [time-nuts] SR620 software and adjustment Volker: This is the adjustment procedure that I used: Use the following adjustment sequence to get the frequency spot on: 1. Set the Cal jumper to Cal Enable 2. Connect the reference to Ext Ref (rear) and Input A 3. Switch the counter to Ext Ref 4. Set the CalByte 50 for the best display (this is a very fine adjustement) 5. Switch the counter to Int Ref 6. Set the CalByte 4 for the best display (this adjustement is coarse, optimize!) 7. Set the Cal jumper to Cal Disable The procedure can be found in the list archives and at Brooke Clarke's website at: http://www.prc68.com/I/TandFTE.shtml -Eric On Mon, Nov 12, 2012 at 8:05 AM, Volker Esper ail...@t-online.de wrote: Sorry, I don't want to annoy you, but I can't find the alignment/adjustment procedure for the SR620 - once, I had it... :-( I don's mean that in the manual, there must be another one Bob talked about. By the way: is there any suitable vindous software out there, for talking (and listening) to the SR620 via RS-232? A program like Ulrichs Z38xx would be nice... Thanks a lot and please don't be annoyed - I guess this kind of question is not very inspiring. Volker ___ 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. -- --Eric _ Eric Garner ___ 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. ___ 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] Inexpensive modular gps with 1pps
Looking for a non-surplus ( e.g. A current catalog item) gps module, with serial ( ttl or rs232) and 1 pps. Doesn't need high performance(100ns is fine), but should be $100 ish. Something with an integrated antenna would be great. ___ 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] Inexpensive modular gps with 1pps
the Ublox LEA-6 is pretty cheap and has good performance. and the SUP500F that Brad has been doing group orders on has worked pretty well for me. eric On Mon, Nov 12, 2012 at 10:28 AM, Jim Lux jim...@earthlink.net wrote: Looking for a non-surplus ( e.g. A current catalog item) gps module, with serial ( ttl or rs232) and 1 pps. Doesn't need high performance(100ns is fine), but should be $100 ish. Something with an integrated antenna would be great. ___ 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. -- --Eric _ Eric Garner ___ 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] SR620 software and adjustment Ref queston
Hi Eric; That seemed logical, but I could imagine some topography where looping the signal may have made sense. Thanks Again; Thomas Knox Date: Mon, 12 Nov 2012 10:13:53 -0800 From: garn...@gmail.com To: time-nuts@febo.com Subject: Re: [time-nuts] SR620 software and adjustment Ref queston the reference in step 2 is the best reference you own, not the internal ref. sorry for the confusion. -eric On Mon, Nov 12, 2012 at 9:59 AM, Tom Knox act...@hotmail.com wrote: In step 2 is this my Lab Ref, or the SR620 ref out that is put into Ext Ref and Input A ? Thomas Knox Date: Mon, 12 Nov 2012 09:52:13 -0800 From: garn...@gmail.com To: time-nuts@febo.com Subject: Re: [time-nuts] SR620 software and adjustment Volker: This is the adjustment procedure that I used: Use the following adjustment sequence to get the frequency spot on: 1. Set the Cal jumper to Cal Enable 2. Connect the reference to Ext Ref (rear) and Input A 3. Switch the counter to Ext Ref 4. Set the CalByte 50 for the best display (this is a very fine adjustement) 5. Switch the counter to Int Ref 6. Set the CalByte 4 for the best display (this adjustement is coarse, optimize!) 7. Set the Cal jumper to Cal Disable The procedure can be found in the list archives and at Brooke Clarke's website at: http://www.prc68.com/I/TandFTE.shtml -Eric On Mon, Nov 12, 2012 at 8:05 AM, Volker Esper ail...@t-online.de wrote: Sorry, I don't want to annoy you, but I can't find the alignment/adjustment procedure for the SR620 - once, I had it... :-( I don's mean that in the manual, there must be another one Bob talked about. By the way: is there any suitable vindous software out there, for talking (and listening) to the SR620 via RS-232? A program like Ulrichs Z38xx would be nice... Thanks a lot and please don't be annoyed - I guess this kind of question is not very inspiring. Volker ___ 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. -- --Eric _ Eric Garner ___ 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. -- --Eric _ Eric Garner ___ 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.
[time-nuts] Interesting crossover between time-nuttery and caving
This came across my inbox from a caving mailing list and found it to be pretty interesting and time-nuts related: http://www.mediadesk.uzh.ch/articles/2012/mit-atomuhren-das-erdinnere-vermessen_en.html ___ 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] Interesting crossover between time-nuttery and caving
It's interesting to see what new uses old technology can be put to when it gets small enough and inexpensive enough. In my caving days, 30 years ago, I wouldn't have wanted to drag an HP 5071A through a cave :-) Joe Gray W5JG On Mon, Nov 12, 2012 at 3:41 PM, Robert Darlington rdarling...@gmail.com wrote: This came across my inbox from a caving mailing list and found it to be pretty interesting and time-nuts related: http://www.mediadesk.uzh.ch/articles/2012/mit-atomuhren-das-erdinnere-vermessen_en.html ___ 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] Interesting crossover between time-nuttery and caving
Fascinating application - thanks for posting. Always neat to see when the obscure (atomic clocks, relativity) begin to have direct, applicable relevance (geoid measurement). Brent On Mon, Nov 12, 2012 at 7:03 PM, Joseph Gray jg...@zianet.com wrote: It's interesting to see what new uses old technology can be put to when it gets small enough and inexpensive enough. In my caving days, 30 years ago, I wouldn't have wanted to drag an HP 5071A through a cave :-) Joe Gray W5JG On Mon, Nov 12, 2012 at 3:41 PM, Robert Darlington rdarling...@gmail.com wrote: This came across my inbox from a caving mailing list and found it to be pretty interesting and time-nuts related: http://www.mediadesk.uzh.ch/articles/2012/mit-atomuhren-das-erdinnere-vermessen_en.html ___ 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. ___ 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] HP Z3801A and Tac32
Hi - Thanks to all for the helpful hints which may enable me to use Tac32. Sorry for a new posting but I had a calamity and somehow deleted all the replies instead of moving them to my Timenuts folder!! I converted the output to the DB25 connector on the back of the unit to RS232 comms but it seems I will have to bring a data stream direct from the GPS module out to a separate connector if I am going to be able to read the data. Probably will give this a miss as the BDS software does a first class job anyway. 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] HP Z3801A and Tac32
http://www.realhamradio.com/tac32-interface.htm Brian Kirby KD4FM On 11/12/2012 7:53 PM, Merv Thomas wrote: Hi - Thanks to all for the helpful hints which may enable me to use Tac32. Sorry for a new posting but I had a calamity and somehow deleted all the replies instead of moving them to my Timenuts folder!! I converted the output to the DB25 connector on the back of the unit to RS232 comms but it seems I will have to bring a data stream direct from the GPS module out to a separate connector if I am going to be able to read the data. Probably will give this a miss as the BDS software does a first class job anyway. 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] Inexpensive modular gps with 1pps
Hello You could have a look to the Trimble Anapala and Silvana. http://www.trimble.com/embeddedsystems/antenna-companion-modules.aspx Regards Luc Le 12 nov. 2012 à 19:45, Eric Garner garn...@gmail.com a écrit : the Ublox LEA-6 is pretty cheap and has good performance. and the SUP500F that Brad has been doing group orders on has worked pretty well for me. eric On Mon, Nov 12, 2012 at 10:28 AM, Jim Lux jim...@earthlink.net wrote: Looking for a non-surplus ( e.g. A current catalog item) gps module, with serial ( ttl or rs232) and 1 pps. Doesn't need high performance(100ns is fine), but should be $100 ish. Something with an integrated antenna would be great. ___ 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. -- --Eric _ Eric Garner ___ 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.
