Re: [time-nuts] Trimble GPS board (65256, 57963)
The "Trimble 57963-C" and "Symmetricom UCCM 089-03861-02" boards were previously discussed in August 2015. Over the past few weeks, the prices have decreased recently. Sergiy in Kyiv, Ukraine reverse engineered some of the pin functions on the 50-pin connector of these OCXO boards. http://tipok.org.ua/node/53 These modules have no direct NMEA support, but have their own binary protocol and additional signals, available on the 50-pin connector. Should be useful for stable 10MHz and 1PPS signals. Notes on UCCM-P > http://abelian.org/vlf/tmp/notes-57963.txt -- EEVBlog also commented in these Trimble units (supposedly BG7TBL uses in some products). https://www.eevblog.com/forum/projects/trimble-65256-5v-10mhz-as-fitted-in-trimble-gpsdo-and-some-bg7tbl-output-level/ Andy Brown's Teardown Blog of the BG7TBL GPSDO http://andybrown.me.uk/2016/11/12/gpsdo-ebay/ YouTube Video https://m.youtube.com/watch?v=vH1q_Mh4luY greg w9gb Sent from iPad Air ___ 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] Trimble GPS board
HI On Aug 28, 2015, at 4:46 PM, Angus not.ag...@btinternet.com wrote: On Sun, 23 Aug 2015 23:36:27 -0400, you wrote: Hi Angus, Thanks for your reply. My original suspicion is the +6.5V rail. That needs to come from somewhere, and you need headroom if it's an unregulated input. Pumping 2A through a regulator like that is no easy feat. Although rated for 3A, you need to keep the junction temperature below 125C. The part has a 30C/W thermal resistance (Tja) with a 1 square copper pad. So 6.5V and 3A calculate as follows: (6.5V-5V)*3A=4.5W. 4.5W*30C/W=135C RISE, add that to ambient, 25C, and you are 35C over max junction. In my world we have a 70C ambient, and that leaves me (125C-70C)/30C/W=1.83W, or a maximum of 1.83W/1.5V=1.22A. Generally a tab mounted TO-220 (a D2Pak) can have a Tjc (junction to case) or less than 1C/W. It's all the reest of the mounting that piles on the thermal resistance. The Trimble board has a top layer pad, some far side pad, and probably multiple layer of ground plane over the rest of the board. The mounting post is mostly likely part of the thermal resistance calculation. There is also a time constant involved, it probably can't take the 2A forever, just long enough to get the oven up to temp. I suspect they may have gotten the thermal impedance down as low as 10C/W. I will test it with 12V and let everyone know if I fry the board. Bob Hi Bob, There's not really any need for a 6V or so rail - a DC-DC converter (and probably some filtering) can provide the right voltage just where it's needed. What looks like a Symmetricom variant is in listing #271483752431. It does appear to have a DC-DC converter, etc., on the board. Anyway, I dug out my Trimble to have a look at it, and I see that there's a 10V tantalum capacitor on the input power, so it's certainly not meant to run on 12V. If they derated that cap 20%, it is not meant to run on anything over 8V. It’s rare to see a voltage between 6.3 and 10 on those parts. Obviously 6.3 is to close to run on a 6V line and get any decent MTBF. Bob Angus. ___ 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] Trimble GPS board
On Sun, 23 Aug 2015 23:36:27 -0400, you wrote: Hi Angus, Thanks for your reply. My original suspicion is the +6.5V rail. That needs to come from somewhere, and you need headroom if it's an unregulated input. Pumping 2A through a regulator like that is no easy feat. Although rated for 3A, you need to keep the junction temperature below 125C. The part has a 30C/W thermal resistance (Tja) with a 1 square copper pad. So 6.5V and 3A calculate as follows: (6.5V-5V)*3A=4.5W. 4.5W*30C/W=135C RISE, add that to ambient, 25C, and you are 35C over max junction. In my world we have a 70C ambient, and that leaves me (125C-70C)/30C/W=1.83W, or a maximum of 1.83W/1.5V=1.22A. Generally a tab mounted TO-220 (a D2Pak) can have a Tjc (junction to case) or less than 1C/W. It's all the reest of the mounting that piles on the thermal resistance. The Trimble board has a top layer pad, some far side pad, and probably multiple layer of ground plane over the rest of the board. The mounting post is mostly likely part of the thermal resistance calculation. There is also a time constant involved, it probably can't take the 2A forever, just long enough to get the oven up to temp. I suspect they may have gotten the thermal impedance down as low as 10C/W. I will test it with 12V and let everyone know if I fry the board. Bob Hi Bob, There's not really any need for a 6V or so rail - a DC-DC converter (and probably some filtering) can provide the right voltage just where it's needed. What looks like a Symmetricom variant is in listing #271483752431. It does appear to have a DC-DC converter, etc., on the board. Anyway, I dug out my Trimble to have a look at it, and I see that there's a 10V tantalum capacitor on the input power, so it's certainly not meant to run on 12V. Angus. ___ 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] Trimble GPS board
Arthur, You are correct, I missed that regulator, but may other Trimble oscillators are powered by +12V. That's what led me down the wrong path. I still suspect that it might have been designed for +12V, as +6.5V is not a common supply rail. I just got my Trimble board yesterday and hope to have it running this week. I am still wrestling with my Z3801, trying to get it to run with a Morion MV89, but then that crapped out. Now trying to get it to work with a Efratom OCXO. Bob -Original Message- From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Arthur Dent Sent: Saturday, August 22, 2015 6:25 PM To: time-nuts@febo.com Subject: [time-nuts] Trimble GPS board rbenward at verizon.net wrote: See below, here is a 73090 OCXO (same as on some of those GPSDO boards) powered by +12V. You are incorrect in your assumption that the link you have supplied shows a 73090 OCXO powered by +12VDC. The BOARD is indeed powered by 12VDC (or 15VDC if you read the listing) but if you look at all the photos you will see a 3-terminal regulator on the bottom of the pc board. The Trimble GPSDO I'm supplying 6.3VDC to had a 5 volt regulator that has a measured output of 5.00VDC and the supply pin on the oscillator had that 5.00VDC on it, not the 6.3VDC from my supply. A continuity check shows a direct connection from the regulator's 5 volt output directly to the oscillator's supply pin. Because of the higher current drawn by the 5 volt oven, running the input to the board at 12VDC and wasting all that power as heat would not be wise. 6.3VDC makes me happy and they chose a LDO regulator for a good reason. The one error I did notice is I said the board locked after it found satellites but that is incorrect. It does find satellites quickly but takes about 10 minutes to lock and that is when the 10Mhz output is enabled. I did some of my checking around 1AM and that is not a good time for clear thinking or writing. -Arthur ___ 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] Trimble GPS board
Hi Angus, Thanks for your reply. My original suspicion is the +6.5V rail. That needs to come from somewhere, and you need headroom if it's an unregulated input. Pumping 2A through a regulator like that is no easy feat. Although rated for 3A, you need to keep the junction temperature below 125C. The part has a 30C/W thermal resistance (Tja) with a 1 square copper pad. So 6.5V and 3A calculate as follows: (6.5V-5V)*3A=4.5W. 4.5W*30C/W=135C RISE, add that to ambient, 25C, and you are 35C over max junction. In my world we have a 70C ambient, and that leaves me (125C-70C)/30C/W=1.83W, or a maximum of 1.83W/1.5V=1.22A. Generally a tab mounted TO-220 (a D2Pak) can have a Tjc (junction to case) or less than 1C/W. It's all the reest of the mounting that piles on the thermal resistance. The Trimble board has a top layer pad, some far side pad, and probably multiple layer of ground plane over the rest of the board. The mounting post is mostly likely part of the thermal resistance calculation. There is also a time constant involved, it probably can't take the 2A forever, just long enough to get the oven up to temp. I suspect they may have gotten the thermal impedance down as low as 10C/W. I will test it with 12V and let everyone know if I fry the board. Bob -Original Message- From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Angus Sent: Sunday, August 23, 2015 8:30 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Trimble GPS board Hi Bob, I got a Trimble 57963-80 last year and the 73090 OXCO and some other parts on it are supplied with 5V from the LT1764A. The DSP, FPGA, etc., also have various small regulators supplying their supply voltages - one even has a dropper resistor in series. These are connected to the main input supply, so raising it above what it should be is probably not a good idea. I thought at first that the LT1764A would be thermally connected to the fixing hole beside it so that the heat could be removed, but it is only connected to the copper on the top of board at that point - then again, that may be the way it was mounted. I did put a temp sensor on the 1764 to see how much it heated up during warm up and when running, but neither looked close to being a problem when run at 6V and room temperature. At 6V, it took 2A during warm up and just over 1A when running at room temp, but the warm up is fast. When I got the board, someone had written on the OCXO with a marker pen what the pins were, and the power was marked as 12V, and an EFC voltage was also written on (about 0.2V from what I measured) which was all a little weird. It was listed as having been tested, but since the seller said that they had no connection info, who tested it and how is anyone's guess... Angus. On Sat, 22 Aug 2015 14:02:35 -0400, you wrote: Hi Arthur, Thank you for this information. I have not received my board yet, I probably still have a few weeks to go. The LT1764 will take up to 20V, but I would never go to the edge. You could easily do 12V, the only downside is the dissipation in the LT17654. Use a variable power supply and raise the voltage slowly. Monitor the temperature with a thermocouple, IR spot meter (radio shack had one for $10), or just use your finger. If you can keep your finger on it comfortable for a long period of time, the temp should be OK. The junction temp is rated for 125C. Now on the flips side, my only concern is the regulator is not supplying the oven power. Most Trimble OCXOs I see on Ebay are powered by +12. When supplying only 6.5V the oven might not get up to temp producing frequency instability and some erratic EFC stats. See below, here is a 73090 OCXO (same as on some of those GPSDO boards) powered by +12V. It's possible the regulator is meant to be powered from +12V, supplying power to the digital logic and to the oscillator portion of the OCXO. Then +12V directly supplies the oven. http://www.ebay.com/itm/10-00MHz-Trimble-Double-Oven-OCXO- Trimble-7 3090-Double-sinewave-15V-12V-/251883335405?hash=item3aa56aaeed I will post my success and let everyone know how I make out. I purchased this to have a backup for my Z3801 Z3805. Both are on the fritz, I will be post those trials and tribulations on a new thread. Thanks so much for your response. 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. ___ 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
Re: [time-nuts] Trimble GPS board
On Sat, 22 Aug 2015 18:25:04 -0400, you wrote: rbenward at verizon.net wrote: See below, here is a 73090 OCXO (same as on some of those GPSDO boards) powered by +12V. You are incorrect in your assumption that the link you have supplied shows a 73090 OCXO powered by +12VDC. The BOARD is indeed powered by 12VDC (or 15VDC if you read the listing) but if you look at all the photos you will see a 3-terminal regulator on the bottom of the pc board. Hi, It does indeed have a reg, but as far as I can see it's a 7812 that's in the picture in the listing. This would also explain why it has a 12V or 15V selector link. I'm not suggesting that it's a 12V osc - on my 57963-80 it is definitely fed just 5V from the regulator. I also used 6V for the power supply. It also appears just to be a basic, fast warm-up AT OCXO, which fits in with the short time constant on the GPS control loop. Angus. The Trimble GPSDO I'm supplying 6.3VDC to had a 5 volt regulator that has a measured output of 5.00VDC and the supply pin on the oscillator had that 5.00VDC on it, not the 6.3VDC from my supply. A continuity check shows a direct connection from the regulator's 5 volt output directly to the oscillator's supply pin. Because of the higher current drawn by the 5 volt oven, running the input to the board at 12VDC and wasting all that power as heat would not be wise. 6.3VDC makes me happy and they chose a LDO regulator for a good reason. The one error I did notice is I said the board locked after it found satellites but that is incorrect. It does find satellites quickly but takes about 10 minutes to lock and that is when the 10Mhz output is enabled. I did some of my checking around 1AM and that is not a good time for clear thinking or writing. -Arthur ___ 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] Trimble GPS board
Hi The gotcah (as many here have found out the hard way) is that the OCXO is indeed a +5V part and not a +12V unit. Apparently the internal Chinese market has them mis-labeld. That bleeds over into the listings you see on eBay. There are a *lot* of mistaken listings …. Bob On Aug 22, 2015, at 2:02 PM, Bob rbenw...@verizon.net wrote: Hi Arthur, Thank you for this information. I have not received my board yet, I probably still have a few weeks to go. The LT1764 will take up to 20V, but I would never go to the edge. You could easily do 12V, the only downside is the dissipation in the LT17654. Use a variable power supply and raise the voltage slowly. Monitor the temperature with a thermocouple, IR spot meter (radio shack had one for $10), or just use your finger. If you can keep your finger on it comfortable for a long period of time, the temp should be OK. The junction temp is rated for 125C. Now on the flips side, my only concern is the regulator is not supplying the oven power. Most Trimble OCXOs I see on Ebay are powered by +12. When supplying only 6.5V the oven might not get up to temp producing frequency instability and some erratic EFC stats. See below, here is a 73090 OCXO (same as on some of those GPSDO boards) powered by +12V. It's possible the regulator is meant to be powered from +12V, supplying power to the digital logic and to the oscillator portion of the OCXO. Then +12V directly supplies the oven. http://www.ebay.com/itm/10-00MHz-Trimble-Double-Oven-OCXO-Trimble-73090-Double-sinewave-15V-12V-/251883335405?hash=item3aa56aaeed I will post my success and let everyone know how I make out. I purchased this to have a backup for my Z3801 Z3805. Both are on the fritz, I will be post those trials and tribulations on a new thread. Thanks so much for your response. 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. ___ 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] Trimble GPS board
Hi Bob, I got a Trimble 57963-80 last year and the 73090 OXCO and some other parts on it are supplied with 5V from the LT1764A. The DSP, FPGA, etc., also have various small regulators supplying their supply voltages - one even has a dropper resistor in series. These are connected to the main input supply, so raising it above what it should be is probably not a good idea. I thought at first that the LT1764A would be thermally connected to the fixing hole beside it so that the heat could be removed, but it is only connected to the copper on the top of board at that point - then again, that may be the way it was mounted. I did put a temp sensor on the 1764 to see how much it heated up during warm up and when running, but neither looked close to being a problem when run at 6V and room temperature. At 6V, it took 2A during warm up and just over 1A when running at room temp, but the warm up is fast. When I got the board, someone had written on the OCXO with a marker pen what the pins were, and the power was marked as 12V, and an EFC voltage was also written on (about 0.2V from what I measured) which was all a little weird. It was listed as having been tested, but since the seller said that they had no connection info, who tested it and how is anyone's guess... Angus. On Sat, 22 Aug 2015 14:02:35 -0400, you wrote: Hi Arthur, Thank you for this information. I have not received my board yet, I probably still have a few weeks to go. The LT1764 will take up to 20V, but I would never go to the edge. You could easily do 12V, the only downside is the dissipation in the LT17654. Use a variable power supply and raise the voltage slowly. Monitor the temperature with a thermocouple, IR spot meter (radio shack had one for $10), or just use your finger. If you can keep your finger on it comfortable for a long period of time, the temp should be OK. The junction temp is rated for 125C. Now on the flips side, my only concern is the regulator is not supplying the oven power. Most Trimble OCXOs I see on Ebay are powered by +12. When supplying only 6.5V the oven might not get up to temp producing frequency instability and some erratic EFC stats. See below, here is a 73090 OCXO (same as on some of those GPSDO boards) powered by +12V. It's possible the regulator is meant to be powered from +12V, supplying power to the digital logic and to the oscillator portion of the OCXO. Then +12V directly supplies the oven. http://www.ebay.com/itm/10-00MHz-Trimble-Double-Oven-OCXO-Trimble-73090-Double-sinewave-15V-12V-/251883335405?hash=item3aa56aaeed I will post my success and let everyone know how I make out. I purchased this to have a backup for my Z3801 Z3805. Both are on the fritz, I will be post those trials and tribulations on a new thread. Thanks so much for your response. 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. ___ 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] Trimble GPS board
On the left front corner of the board is the 1 PPS connector. To the right of that connector are 4 unpopulated holes for a connector. I traced those out and found 2 went to a RS-232 chip that appears to be a different type depending on which of the boards you receive. The left hole is ground (RS-232 pin 5 on the computer end), then the next hole is not connected, then RS-232 pin 2, then pin 3 being the hole with the square index pad on the right. Using a terminal emulator program and 57600 8N1N I was able to communicate with the board. Typing '?' will give you a long list of all the commands it will accept. For instance, 'STAT' and 'POSSTAT' are 2 of the commands that will give you info on how the board is working. Typing *IDN? at the UCCM-P prompt returns 57964-60 for my board and POSSTAT shows up to 12 satellites can be tracked. The date code on my unit is 2009. The board seems to work well but the OCXO runs pretty hot so it probably isn't a double oven. The multicontact connector probably has most of the functions and LED signals available but I couldn't see using it so I'll get whatever signals I want directly off the pc board. Hi Arthur, That's interesting - I connected my one up to Trimble studio and others, but got no joy - I never thought of just asking it :) I went through the connections on the other pins, but most are just to the FPGA or 0V. Most don't appear to be doing a lot - maybe they need whatever is meant to be connected to this board to be connected before they do anything. There is another serial port which is the same baud rate but appears to be binary, and prattles away every 2 seconds: Pin 36 goes to Pin 4 of the UART (RX) Pin 37 goes to Pin 8 of the UART (TX) Pin 2 has binary data of about 64 bits at 1.6us/bit - looks like maybe a timer or similar. (Above pin numbers assume V+ is connected to pins 44-50 and are hopefully correct, but always worth checking) Angus. ___ 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] Trimble GPS board
Hi Arthur, Thank you for this information. I have not received my board yet, I probably still have a few weeks to go. The LT1764 will take up to 20V, but I would never go to the edge. You could easily do 12V, the only downside is the dissipation in the LT17654. Use a variable power supply and raise the voltage slowly. Monitor the temperature with a thermocouple, IR spot meter (radio shack had one for $10), or just use your finger. If you can keep your finger on it comfortable for a long period of time, the temp should be OK. The junction temp is rated for 125C. Now on the flips side, my only concern is the regulator is not supplying the oven power. Most Trimble OCXOs I see on Ebay are powered by +12. When supplying only 6.5V the oven might not get up to temp producing frequency instability and some erratic EFC stats. See below, here is a 73090 OCXO (same as on some of those GPSDO boards) powered by +12V. It's possible the regulator is meant to be powered from +12V, supplying power to the digital logic and to the oscillator portion of the OCXO. Then +12V directly supplies the oven. http://www.ebay.com/itm/10-00MHz-Trimble-Double-Oven-OCXO-Trimble-73090-Double-sinewave-15V-12V-/251883335405?hash=item3aa56aaeed I will post my success and let everyone know how I make out. I purchased this to have a backup for my Z3801 Z3805. Both are on the fritz, I will be post those trials and tribulations on a new thread. Thanks so much for your response. 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] Trimble GPS board
Hi Great information ! On Aug 22, 2015, at 11:19 AM, Arthur Dent golgarfrinc...@gmail.com wrote: Does anyone have any information or experience with this small Trimble GPSDO? I had previously posted that what I thought these boards were and how they might work and said I was waiting for 2 of these boards that I had ordered to arrive. Yesterday the 2 boards arrived in an Epacket from China. If you order more than one board check them carefully on arrival because the 2 I received were placed back-to-back with no padding in between and a couple of the small SMD components on the back side were partially ripped off the pc board. Fortunately the damage was repairable and both boards are ok. What I found was that there are at least 2 different versions of this GPSDO and although both function the same, the location of some of the parts differ. First, there is the understandable language barrier and if the sellers do have information that could help you get the board up and running, it isn't included in the English listings. Some of the info you can glean from looking at all of the photos of the various units for sale on Ebay is just from arrows on the photos telling where to connect power and get the 10Mhz output. It took me a lot of trial and error plus tracing out some of the runs to get to a point of where the boards were working as intended. The supply voltage required is stated to be 5.6 to 6VDC and this goes to an LT1764A low dropout regulator set to 5VDC out so my 'guess' is that 6VDC should be the minimum supply voltage to make sure the regulator keeps working properly. With the multicontact connector facing you you will see a 5A fuse near the back right edge of the connector. I soldered the '+' supply lead from my power supply (that puts out about 6.3VDC regulated) to the left end of this fuse and the '-' supply lead to the ground plane on the left of the connector. Using too high an input VDC could cause the regulator to dissipate too much heat. How much current does it pull at turn on? The regulator is only rated to 3A so I would *guess* it’s less than that. When the board is powered up with the antenna and the 10Mhz output connected you will see no 10Mhz output. There are two 2-color LEDs on the board, on top of one version, and on the bottom of the other version. One is the ALARM LED and the other is the ACTIVITY LED. On power-up both light red then go out (if all is well) then the ACT LED stays on solid green for maybe 10 minutes until the GPS receiver starts to track satellites. At this point the ACT LED starts to flash a slow green and the 10Mhz output is turned on. After a few more minutes when the board achieves lock the ACT LED starts flashing green at a higher rate. On the left front corner of the board is the 1 PPS connector. To the right of that connector are 4 unpopulated holes for a connector. I traced those out and found 2 went to a RS-232 There’s also this listing that shows an pair of 9 pins tacked on the same board: http://www.ebay.com/itm/Trimble-GPS-Receiver-GPSDO-10MHz-1PPS-GPS-Disciplined-Clock-with-rs232-port-/261997391557?hash=item3d0042eec5 chip that appears to be a different type depending on which of the boards you receive. The left hole is ground (RS-232 pin 5 on the computer end), then the next hole is not connected, then RS-232 pin 2, then pin 3 being the hole with the square index pad on the right. Using a terminal emulator program and 57600 8N1N I was able to communicate with the board. Typing '?' will give you a long list of all the commands it will accept. For instance, 'STAT' and 'POSSTAT' are 2 of the commands that will give you info on how the board is working. Typing *IDN? at the UCCM-P prompt returns 57964-60 for my board and POSSTAT shows up to 12 satellites can be tracked. Time to get a few mods in on LH :)…. The date code on my unit is 2009. The board seems to work well but the OCXO runs pretty hot so it probably isn't a double oven. I think it’s pretty safe to guess that a GPSDO designed well after SA went off for good has a single oven rather than a double oven on it. Bob The multicontact connector probably has most of the functions and LED signals available but I couldn't see using it so I'll get whatever signals I want directly off the pc board. -Arthur ___ 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] Trimble GPS board
Thank you all for your responses. I tried to buy one of those adapters but I think there was a language problem. Still waiting for a positive response from the seller. It seems this guy is selling those small GPSDOs. The ones dated 2014-11-06 2014-12-09 are the Morion, the 2015-07-08 are the Oscilloquartz, and the latest, 2015-07-17 are the Trimbles, all mounted on the same carrier. I assume the numbers are all dates, but why two different models 9 days apart. I wonder if it's a supply issue. 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] Trimble GPS board
Sorry, one more eBay link using this Trimble unit: http://www.ebay.com/itm/Trimble-GPS-Receiver-GPSDO-10MHz-1PPS-GPS-Disciplined-Clock-/18173438?hash=item2a52ccb37e Is that the bg7tbl version? Not sure what the serial connection gives you unless it's al'a BG7TBL? mg On Sun, Aug 16, 2015 at 3:36 PM, M. George m.matthew.geo...@gmail.com wrote: Hi, I poked around and found the EEVblog thread below... BG7TBL is using this board in one of his GPSDO units he sells on eBay. Look through the whole thread, you will see pictures of the GPSDO that is using this board / OCXO: http://www.eevblog.com/forum/testgear/bg7tbl-gpsdo-master-reference/ And yet another eBay seller that is offering this board, I have seen this quite a bit in the past, but at $99 I didn't get excited: http://www.ebay.com/itm/like/301124758583?item=301124758583vectorid=229466rmvSB=true And another $119 complete with the patch coax to SMA connectors and it shows the 6v power connection input: http://www.ebay.com/itm/Trimble-GPS-Receiver-GPSDO-10MHz-1PPS-GPS-Disciplined-Clock-/18173438?hash=item2a52ccb37e mg NG7M On Sun, Aug 16, 2015 at 1:25 PM, Bob Camp kb...@n1k.org wrote: Hi I think you will find that on the part you are looking at: TPN = Trimble Part Number 57964-15 = Trimble’s part number on the module SEC CODE = probably more relevant to the module that the OCXO info Date Code (on OCXO) 0826 = it was made sometime around the middle of 2008 One would *guess* that it is a more modern version of the TBolt. Bob On Aug 16, 2015, at 10:52 AM, Bob Benward rbenw...@verizon.net wrote: Hi all, Does anyone have any information or experience with this small Trimble GPSDO? There doesn't seem to be any associated model number other than the model of the OCXO (63090). I am looking for software, command codes, or hookup schematics, can anyone help? http://www.ebay.com/itm/141734507722?_trksid=p2057872.m2749.l2649 http://www.ebay.com/itm/141734507722?_trksid=p2057872.m2749.l2649ssPageNam e=STRK%3AMEBIDX%3AIT ssPageName=STRK%3AMEBIDX%3AIT Thanks, 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. ___ 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. -- M. George -- M. George ___ 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] Trimble GPS board
Hi, I poked around and found the EEVblog thread below... BG7TBL is using this board in one of his GPSDO units he sells on eBay. Look through the whole thread, you will see pictures of the GPSDO that is using this board / OCXO: http://www.eevblog.com/forum/testgear/bg7tbl-gpsdo-master-reference/ And yet another eBay seller that is offering this board, I have seen this quite a bit in the past, but at $99 I didn't get excited: http://www.ebay.com/itm/like/301124758583?item=301124758583vectorid=229466rmvSB=true And another $119 complete with the patch coax to SMA connectors and it shows the 6v power connection input: http://www.ebay.com/itm/Trimble-GPS-Receiver-GPSDO-10MHz-1PPS-GPS-Disciplined-Clock-/18173438?hash=item2a52ccb37e mg NG7M On Sun, Aug 16, 2015 at 1:25 PM, Bob Camp kb...@n1k.org wrote: Hi I think you will find that on the part you are looking at: TPN = Trimble Part Number 57964-15 = Trimble’s part number on the module SEC CODE = probably more relevant to the module that the OCXO info Date Code (on OCXO) 0826 = it was made sometime around the middle of 2008 One would *guess* that it is a more modern version of the TBolt. Bob On Aug 16, 2015, at 10:52 AM, Bob Benward rbenw...@verizon.net wrote: Hi all, Does anyone have any information or experience with this small Trimble GPSDO? There doesn't seem to be any associated model number other than the model of the OCXO (63090). I am looking for software, command codes, or hookup schematics, can anyone help? http://www.ebay.com/itm/141734507722?_trksid=p2057872.m2749.l2649 http://www.ebay.com/itm/141734507722?_trksid=p2057872.m2749.l2649ssPageNam e=STRK%3AMEBIDX%3AIT ssPageName=STRK%3AMEBIDX%3AIT Thanks, 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. ___ 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. -- M. George ___ 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] Trimble GPS board
Hi I think you will find that on the part you are looking at: TPN = Trimble Part Number 57964-15 = Trimble’s part number on the module SEC CODE = probably more relevant to the module that the OCXO info Date Code (on OCXO) 0826 = it was made sometime around the middle of 2008 One would *guess* that it is a more modern version of the TBolt. Bob On Aug 16, 2015, at 10:52 AM, Bob Benward rbenw...@verizon.net wrote: Hi all, Does anyone have any information or experience with this small Trimble GPSDO? There doesn't seem to be any associated model number other than the model of the OCXO (63090). I am looking for software, command codes, or hookup schematics, can anyone help? http://www.ebay.com/itm/141734507722?_trksid=p2057872.m2749.l2649 http://www.ebay.com/itm/141734507722?_trksid=p2057872.m2749.l2649ssPageNam e=STRK%3AMEBIDX%3AIT ssPageName=STRK%3AMEBIDX%3AIT Thanks, 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. ___ 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.
