Re: [time-nuts] time-nuts Digest, Vol 105, Issue 11
Thank you Chuck, That certainly hit the spot. I can certainly verify the Z3805A is unresponsive to commands on Port 2. May I ask where the port2 Broadcast (Continuous Output) Mode is documented? mark _ See below: Broadcast (Continuous Output) Mode: The Serial Port (Port 2) interface is used by the GPS Receiverto broadcast the time of day and abbreviated status once every two seconds on the even second. The length of the transmission is 16 bytes and is partially decoded below (The data is shown in Hex): 00 09 01 07 03 01 04 04 00 02 03 01 03 00 00 0D All numerical data is transmitted as a single byte per digit, i.e. digit 9 is transmitted as 09 Hex. Bytes 1-2 are two least significant digits of the Year (00 09) 2009. Bytes 3-5 are the numerical Day of the Year (01 07 03) or day 173 (June 22). Bytes 6-7 are the Hour (01 04), hour 14 or 2 PM. Bytes 8-9 are the Minute (04 00), minute 40. Bytes 10-11 are the Second (02 03), second 23. Bytes 12-13 are the Accumulated Leap Seconds (01 03), 13 leap seconds. Bytes 14-15 SmartClock Mode or Status: 01 00: Power-Up Mode 10 00 Holdover Mode 00 00 GPS Lock Mode Byte 16 is a Carriage Return (0D). Under the example above, the Date and Time is June 22, 2009 (day 173) at 14:40:23, and no Holdover. On the Port 2 serial interface, the serial port parameters are fixed at 9600, N, 8, 1 and cannot be changed. Although the Port 2connector is wired for Receive Data (pin 3) it does not appear that the GPS Receiverwill accept any commands. All commands must be issued over the Port 1serial interface connector. Chuck Zabilski BD Systems, Inc. ___ 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] Reading data from Thunderbolt using an Arduino
Russ, Check the source code on my GPSMonitor project. It will give you an example how to decode the Trimble data. WWW.ko4bb.com Didier Russ Ramirez russ.rami...@gmail.com wrote: I've been playing around with the idea of using an Arduino UNO to read information out of my Thunderbolt GPSDO via the serial port rather than using a PC (99% of the time anyway). The idea here is to get the time and some status info to drive an LED display and some LEDs to show the time adjusted to Central time, light up to 8 LEDs to represent the birds that are currently locked onto, and one LED for a Major alarm. I just received the RS232 to TTL converter breakout board today and I can see received data over the hardware serial RX pin. Now I know that TB uses TSIP and not NMEA msgs, but is TSIP binary? I am getting this kind of thing at 9600: âV?éFõ.¦×¿ú'NÅ/Ã@pq:yÀ etc about once per second. I found this code on Google Code and the header file here https://code.google.com/p/arduino-trimble-thunderbolt-gpsdo/source/browse/trunk/libraries/Tsip/Tsip.h?r=31 implies to me that I should use this as a starting point as this sure ain't ASCII coming over the wire. Does this sound right? Thanks, Russ K0WFS ___ 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. -- Sent from my Nexus 7 tablet. ___ 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] Reading data from Thunderbolt using an Arduino
Hi Another good place to figure out how to decode the TBolt - check out the Lady Heather source code. There's far more in there than you will ever need, it's also all in one place. Bob On Apr 4, 2013, at 10:56 PM, Russ Ramirez russ.rami...@gmail.com wrote: I've been playing around with the idea of using an Arduino UNO to read information out of my Thunderbolt GPSDO via the serial port rather than using a PC (99% of the time anyway). The idea here is to get the time and some status info to drive an LED display and some LEDs to show the time adjusted to Central time, light up to 8 LEDs to represent the birds that are currently locked onto, and one LED for a Major alarm. I just received the RS232 to TTL converter breakout board today and I can see received data over the hardware serial RX pin. Now I know that TB uses TSIP and not NMEA msgs, but is TSIP binary? I am getting this kind of thing at 9600: âV?éFõ.¦×¿ú'NÅ/Ø@pq:yÀ etc about once per second. I found this code on Google Code and the header file here https://code.google.com/p/arduino-trimble-thunderbolt-gpsdo/source/browse/trunk/libraries/Tsip/Tsip.h?r=31 implies to me that I should use this as a starting point as this sure ain't ASCII coming over the wire. Does this sound right? Thanks, Russ K0WFS ___ 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] Lady Heather
What's the command to set the map to show satellite signal level vs position? 73, Mike, N1JEZ A closed mouth gathers no feet ___ 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] Reading data from Thunderbolt using an Arduino
Thanks Chris. The reason for the LEDs is that I am re-purposing a Netgear VPN Router case, which is steel and a bit more difficult to work-over than aluminum or plastic :-) The size of the case is good and a very good fit for this project. I may change my mind and go with a smaller case and one of the 2x16 LCDs I already have, but other than the clock, the rest of it was already there and seemed sufficient for an at a glace kind of display. I guess I didn't know that the TBolt could be placed in NMEA mode. After posting this I did an RTFM and found a few answers in the TBolt manual :-) Russ Some kind of uP really is a good idea. But why use LEDS? Get a 2x16 LCD. They cost $6 and are much easier to drive with an Arduino. They can have scrolling text. Yes. you are getting binary data. You are going to need to red the manual. Or put the t-bolt into NEMA mode. On Thu, Apr 4, 2013 at 7:56 PM, Russ Ramirez russ.rami...@gmail.com wrote: I've been playing around with the idea of using an Arduino UNO to read information out of my Thunderbolt GPSDO via the serial port rather than using a PC (99% of the time anyway). The idea here is to get the time and some status info to drive an LED display and some LEDs to show the time adjusted to Central time, light up to 8 LEDs to represent the birds that are currently locked onto, and one LED for a Major alarm. I just received the RS232 to TTL converter breakout board today and I can see received data over the hardware serial RX pin. Now I know that TB uses TSIP and not NMEA msgs, but is TSIP binary? I am getting this kind of thing at 9600: ?V??F?.?? ??'N?/??@p q:y? etc about once per second. I found this code on Google Code and the header file here https://code.google.com/p/arduino-trimble-thunderbolt-gpsdo/source/browse/trunk/libraries/Tsip/Tsip.h?r=31 implies to me that I should use this as a starting point as this sure ain't ASCII coming over the wire. Does this sound right? Thanks, Russ K0WFS ___ 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.
Re: [time-nuts] FE-5680 frequency jump
I found the cause of the 4 mHz frequency jump. I have an LPRO-101, an FE-5680, power supplies and a Motorola M12T GPS board in a surplus case. When I put the case away to work on another project I piled the hockey puck antenna and lead in the case and it happened to land on the FE-5680. I noticed the antenna stuck firmly to the FE-5680 case when I got the project back out. I found I could get a 6 mHz (0.6 ppb) shift comparing the frequency with residual magnetism from the magnet stuck on the FE-5680 case to the frequency after demagnetizing the FE-5680 case. Unintentional C field adjustment. Dope slap, live and learn. Bob -Original Message- From: Magnus Danielson Sent: Monday, April 01, 2013 5:13 PM To: time-nuts@febo.com Subject: Re: [time-nuts] FE-5680 frequency jump On 04/02/2013 01:12 AM, Attila Kinali wrote: On Mon, 01 Apr 2013 23:57:48 +0200 Magnus Danielsonmag...@rubidium.dyndns.org wrote: On 04/01/2013 10:06 PM, Bob Quenelle wrote: I’ve been running an FE-5680 for maybe a total of 50 hours over the last several months. I found that an offset setting of 180 made it track GPS and (previously-set) LPRO-101 10 MHz signals. Even with power cycling, after about 1/2 hour, with an offset setting of 180 the FE-5680 was stable. The last time I turned on the FE-5680, it drifted with a setting of 180 and needed a new setting of –415 to track the other signals. That’s a change of 595 counts and with a resolution of 6.8 uHz per count, a frequency change of 4 mHz (0.004 Hz) and 0.4 ppb. Operation at the new setting is stable for now. The lock signal indicates lock and the power supply voltage is still 15V. I haven’t checked lamp voltage or VCXO voltage as that requires opening the case. How long have it been turned on since last power-up? Let it sit for a day at least. I've found that it is easy to be in too much hurry to judge the situation and trim things efter power-up. The crystal oscillator just doesn't get the time to settle in. That might be indeed the case. Figure 3 in [1] gives quite high frequency aging differences after switch on and long run time. Attila Kinali [1] http://www.pi5.uni-stuttgart.de/common/show_file.php/lectures/100/blaetter/The%20Rubidium%20Clock%20and%20Basic%20Research.pdf You are confusing the VCXOs frequency drift with that of the rubidiums (which is the result of the FLL locking of the VCXO to the rubidium resonance). If the VCXO still has a fair distance to drift, then false locking can occur while compating the initially quite vigorous drift rate. The only real way to handle that is to sit and wait for it to settle down. Only after that may trimming of the oscillator be done to zeroize the integrator state. A small commercial rubidium doesn't need very long to get a feel if it is in good condition or not, but sitting on your hands and let it warm up gives you a fair idea of just how skewed situation it is. That's also true for caesium clocks. So, sit on your hands and let it settle. Better yet, leave on while you do other things. Just recall to put enought cooling on it! 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. ___ 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] FE-5680 frequency jump
Thank you for this information, Bob! I have to reconsider the frequency jumps of my GPSDOs... Volker Am 05.04.2013 20:59, schrieb Bob Quenelle: I found the cause of the 4 mHz frequency jump. I have an LPRO-101, an FE-5680, power supplies and a Motorola M12T GPS board in a surplus case. When I put the case away to work on another project I piled the hockey puck antenna and lead in the case and it happened to land on the FE-5680. I noticed the antenna stuck firmly to the FE-5680 case when I got the project back out. I found I could get a 6 mHz (0.6 ppb) shift comparing the frequency with residual magnetism from the magnet stuck on the FE-5680 case to the frequency after demagnetizing the FE-5680 case. Unintentional C field adjustment. Dope slap, live and learn. Bob -Original Message- From: Magnus Danielson Sent: Monday, April 01, 2013 5:13 PM To: time-nuts@febo.com Subject: Re: [time-nuts] FE-5680 frequency jump On 04/02/2013 01:12 AM, Attila Kinali wrote: On Mon, 01 Apr 2013 23:57:48 +0200 Magnus Danielsonmag...@rubidium.dyndns.org wrote: On 04/01/2013 10:06 PM, Bob Quenelle wrote: I’ve been running an FE-5680 for maybe a total of 50 hours over the last several months. I found that an offset setting of 180 made it track GPS and (previously-set) LPRO-101 10 MHz signals. Even with power cycling, after about 1/2 hour, with an offset setting of 180 the FE-5680 was stable. The last time I turned on the FE-5680, it drifted with a setting of 180 and needed a new setting of –415 to track the other signals. That’s a change of 595 counts and with a resolution of 6.8 uHz per count, a frequency change of 4 mHz (0.004 Hz) and 0.4 ppb. Operation at the new setting is stable for now. The lock signal indicates lock and the power supply voltage is still 15V. I haven’t checked lamp voltage or VCXO voltage as that requires opening the case. How long have it been turned on since last power-up? Let it sit for a day at least. I've found that it is easy to be in too much hurry to judge the situation and trim things efter power-up. The crystal oscillator just doesn't get the time to settle in. That might be indeed the case. Figure 3 in [1] gives quite high frequency aging differences after switch on and long run time. Attila Kinali [1] http://www.pi5.uni-stuttgart.de/common/show_file.php/lectures/100/blaetter/The%20Rubidium%20Clock%20and%20Basic%20Research.pdf You are confusing the VCXOs frequency drift with that of the rubidiums (which is the result of the FLL locking of the VCXO to the rubidium resonance). If the VCXO still has a fair distance to drift, then false locking can occur while compating the initially quite vigorous drift rate. The only real way to handle that is to sit and wait for it to settle down. Only after that may trimming of the oscillator be done to zeroize the integrator state. A small commercial rubidium doesn't need very long to get a feel if it is in good condition or not, but sitting on your hands and let it warm up gives you a fair idea of just how skewed situation it is. That's also true for caesium clocks. So, sit on your hands and let it settle. Better yet, leave on while you do other things. Just recall to put enought cooling on it! 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. ___ 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] Reading data from Thunderbolt using an Arduino
Thanks Didier, I have been to your site before, but somehow missed this project. Russ, Check the source code on my GPSMonitor project. It will give you an example how to decode the Trimble data. WWW.ko4bb.com Didier ___ 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] Reading data from Thunderbolt using an Arduino
Of course, you are welcome to use any part or all of it. Software is free and the hardware cost almost negligible. If you don't do C, that would be an excellent way to get started with something simple and that works and that does something you need. Didier Sent from my Droid Razr 4G LTE wireless tracker. -Original Message- From: Russ Ramirez russ.rami...@gmail.com To: time-nuts@febo.com Sent: Fri, 05 Apr 2013 3:29 PM Subject: Re: [time-nuts] Reading data from Thunderbolt using an Arduino Thanks Didier, I have been to your site before, but somehow missed this project. Russ, Check the source code on my GPSMonitor project. It will give you an example how to decode the Trimble data. WWW.ko4bb.com Didier ___ 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] FE-5680 frequency jump
Thank you for the info, I used to attach a magnetic mount surface thermometer to my FRS-C to check its operating temperature after installing it in a box. I think it is time to power it up and after some days check it against the GPS. Regards, Ignacio EB4APL On 05/04/2013 20:59, Bob Quenelle wrote: I found the cause of the 4 mHz frequency jump. I have an LPRO-101, an FE-5680, power supplies and a Motorola M12T GPS board in a surplus case. When I put the case away to work on another project I piled the hockey puck antenna and lead in the case and it happened to land on the FE-5680. I noticed the antenna stuck firmly to the FE-5680 case when I got the project back out. I found I could get a 6 mHz (0.6 ppb) shift comparing the frequency with residual magnetism from the magnet stuck on the FE-5680 case to the frequency after demagnetizing the FE-5680 case. Unintentional C field adjustment. Dope slap, live and learn. Bob ___ 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] FE-5680 frequency jump
There's something in the back of my mind that MuMetal is easily magnetized. If that's true, and if the FRS-C and/or FE-5680 cases are made of MuMetal (seems like a good chance), they should be demagnetized anytime they come in contact with a magnet. Ed On 4/5/2013 6:22 PM, EB4APL wrote: Thank you for the info, I used to attach a magnetic mount surface thermometer to my FRS-C to check its operating temperature after installing it in a box. I think it is time to power it up and after some days check it against the GPS. Regards, Ignacio EB4APL On 05/04/2013 20:59, Bob Quenelle wrote: I found the cause of the 4 mHz frequency jump. I have an LPRO-101, an FE-5680, power supplies and a Motorola M12T GPS board in a surplus case. When I put the case away to work on another project I piled the hockey puck antenna and lead in the case and it happened to land on the FE-5680. I noticed the antenna stuck firmly to the FE-5680 case when I got the project back out. I found I could get a 6 mHz (0.6 ppb) shift comparing the frequency with residual magnetism from the magnet stuck on the FE-5680 case to the frequency after demagnetizing the FE-5680 case. Unintentional C field adjustment. Dope slap, live and learn. Bob ___ 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] Reading data from Thunderbolt using an Arduino
Yet another example of parsing TSIP is www.leapsecond.com/tools/tbtalk.c See functions tsip_listen, tsip_triage, and then each packet function. Note they use an unusual and highly compact method to decode every field in the packet. /tvb ___ 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] FE-5680 frequency jump
Actually, mumetal easily loses permeability, hence shielding ability, by mechanical stress or heat. Some mumetals are made to bend for boxes and the like, sheets available from electronics goldmine, I think. Ed Palmer There's something in the back of my mind that MuMetal is easily magnetized. If that's true, and if the FRS-C and/or FE-5680 cases are made of MuMetal (seems like a good chance), they should be demagnetized anytime they come in contact with a magnet. Ed On 4/5/2013 6:22 PM, EB4APL wrote: Thank you for the info, I used to attach a magnetic mount surface thermometer to my FRS-C to check its operating temperature after installing it in a box. I think it is time to power it up and after some days check it against the GPS. Regards, Ignacio EB4APL On 05/04/2013 20:59, Bob Quenelle wrote: I found the cause of the 4 mHz frequency jump. I have an LPRO-101, an FE-5680, power supplies and a Motorola M12T GPS board in a surplus case. When I put the case away to work on another project I piled the hockey puck antenna and lead in the case and it happened to land on the FE-5680. I noticed the antenna stuck firmly to the FE-5680 case when I got the project back out. I found I could get a 6 mHz (0.6 ppb) shift comparing the frequency with residual magnetism from the magnet stuck on the FE-5680 case to the frequency after demagnetizing the FE-5680 case. Unintentional C field adjustment. Dope slap, live and learn. Bob ___ 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. -- Neither the voice of authority nor the weight of reason and argument are as significant as experiment, for thence comes quiet to the mind. De Erroribus Medicorum, R. Bacon, 13th century. If you don't know what it is, don't poke it. Ghost in the Shell Dr. Don Latham AJ7LL Six Mile Systems LLP 17850 Six Mile Road POB 134 Huson, MT, 59846 VOX 406-626-4304 www.lightningforensics.com www.sixmilesystems.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.
