Re: [time-nuts] beta tester needed: hp5370 processor replacement project
Okay, the board has been spoken for. Thanks for your interest. I will soon post gerbers and source so you can build one yourself if you want. We should also figure out how to get a larger number of boards made if there is sufficient interest. ___ 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] beta tester needed: hp5370 processor replacement project
Thanks for getting back to me John. I think it is an interesting idea, and I would like to give it a spin when you are ready to post the gerbers, or make a few extra boards. -Chuck Harris John Seamons wrote: Okay, the board has been spoken for. Thanks for your interest. I will soon post gerbers and source so you can build one yourself if you want. We should also figure out how to get a larger number of boards made if there is sufficient interest. ___ 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] beta tester needed: hp5370 processor replacement project
Since I'm getting a bunch of replies let me ask that you please answer a question in your emails. Please indicate: 1. Just publish the gerbers and source and I'll deal with it myself. 2. I want to buy a blank PCB (no components). 3. I want to buy a finished PCB and I'll buy the BBB, plug it in and download the software myself. 4. I want to buy a finished PCB that includes the BBB pre-loaded with the software. I'm not intending to make any profit on this. And I'd welcome any help. Thanks. ___ 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] Need to measure frequencies of two sources simultaneously
It would seem that you need two counters that share the same gate. That seems to be the best solution, but I am not aware of any off-the-shelf counter that does that. If you only need to count to 200MHz, you could do that in an FPGA. Would not be too expensive, just buy one of the many available kits for a couple hundred $, or convince John to make a special version of his TimePod :) Didier KO4BB On Thu, Oct 24, 2013 at 11:57 AM, tmil...@skylinenet.net wrote: It would seem that you need two counters that share the same gate. Are the two frequencies asynchronous? Thomas Miller, Director of Wireless Services Skyline Network Engineering, LLC 443-250-6381 CONFIDENTIALITY NOTICE: The information contained in this electronic message is confidential information intended for the use of the individual or entity named above. If the reader of this message is not the intended recipient, or an employee or agent responsible for delivering this electronic message to the intended recipient, you are hereby notified that any dissemination or copying of this communication is strictly prohibited. If this message contains non-public personal information about any consumer or customer of the sender or intended recipient, you are further prohibited under penalty of law from using or disclosing the information to any third party by provisions of the federal Gramm-Leach-Bliley Act. If you have received this electronic message in error, please immediately notify us by telephone and return or destroy the original message to assure that it is not read, copied, or distributed by others. ___ 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] Thunderbolt Simulator
In order to test my upcoming Thunderbolt Monitor, I developed a small piece of software to allow me to generate controlled Primary and Supplemental timing packets per the Trimble spec. I think the result may be useful to those who own Trimble Tunderbolt monitoring tools, so I decided to make it available. It is very much beta at this point, but during my testing, I could not make it fail when talking to the Trimble Thunderbolt Monitor software. You can download it from http://www.ko4bb.com/Timing/GPSMonitor/TBoltSim.php Let me know how it goes via direct message, no need to bog the list down with this. Didier KO4BB ___ 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] Splitter for GPS antenna suggestions?
Hi, I want to see if it is possible to feed both the Trimble TB and the Jackson Labs Fury from the existing antenna. It appears both the TB and the Fury are 5vdc antenna power. Checked the auction site for splitters, but before I randomly buy anything, could someone please suggest what they use that works? Thanks, and 73 Frank KJ4OLL ___ 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] Splitter for GPS antenna suggestions?
Hi Frank, HP/Agilent/Symmetricom splitters work well. GPS networking, GPS source are usually covering both L1 L2, which you do not need with your current receivers (the ones you mention). HP/Agilent/Symmetricom is often more expensive on the auction site, even though they are less advanced. Mini-circuits and such generic rf-splitters also works well, but then you might need some dc-blocks, bias-t's etc. Search the archives. Google for splitter site:febo.com or something similarly. kind regards, Björn Hi, I want to see if it is possible to feed both the Trimble TB and the Jackson Labs Fury from the existing antenna. It appears both the TB and the Fury are 5vdc antenna power. Checked the auction site for splitters, but before I randomly buy anything, could someone please suggest what they use that works? Thanks, and 73 Frank KJ4OLL ___ 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] Splitter for GPS antenna suggestions?
Splitters for satellite TV pass DC to/from one receiver and block it for the others. The GPS frequency is well within the satellite downlink frequencies. Satellite TV line amps may come in handy if the signal gets too weak after splitting. On 10/25/2013 03:31 PM, Frank Hughes wrote: Hi, I want to see if it is possible to feed both the Trimble TB and the Jackson Labs Fury from the existing antenna. It appears both the TB and the Fury are 5vdc antenna power. Checked the auction site for splitters, but before I randomly buy anything, could someone please suggest what they use that works? Thanks, and 73 Frank KJ4OLL ___ 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. -- Chuck Forsberg WA7KGX c...@omen.com www.omen.com Developer of Industrial ZMODEM(Tm) for Embedded Applications Omen Technology Inc The High Reliability Software 10255 NW Old Cornelius Pass Portland OR 97231 503-614-0430 ___ 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] Splitter for GPS antenna suggestions?
HP/Agilent/Symmetricom 58535A splitter/amplifier works great. Just unfortunate that they always come in N connector variant. Sometimes available dirt-cheap on Ebay.. They have 1-to-2 all the way up to 1-to-8 variants. In a message dated 10/25/2013 15:34:59 Pacific Daylight Time, hp_cisco...@yahoo.com writes: Hi, I want to see if it is possible to feed both the Trimble TB and the Jackson Labs Fury from the existing antenna. It appears both the TB and the Fury are 5vdc antenna power. Checked the auction site for splitters, but before I randomly buy anything, could someone please suggest what they use that works? Thanks, and 73 Frank KJ4OLL ___ 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] beta tester needed: hp5370 processor replacement project
since you had the board made by OSH park, why not post the board up there as a project. then people can either download the gerbers to use at the board hous of their choosing or order the board from oshpark. On Fri, Oct 25, 2013 at 6:50 AM, John Seamons j...@jks.com wrote: Since I'm getting a bunch of replies let me ask that you please answer a question in your emails. Please indicate: 1. Just publish the gerbers and source and I'll deal with it myself. 2. I want to buy a blank PCB (no components). 3. I want to buy a finished PCB and I'll buy the BBB, plug it in and download the software myself. 4. I want to buy a finished PCB that includes the BBB pre-loaded with the software. I'm not intending to make any profit on this. And I'd welcome any help. Thanks. ___ 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] Splitter for GPS antenna suggestions?
hp_cisco...@yahoo.com said: Checked the auction site for splitters, but before I randomly buy anything, could someone please suggest what they use that works? The HP/Agilent/Symmetricom splitters include an amplifier so the net loss is (roughly) zero. I've never tried cable-TV splitters, but they are cheap and widely available so you can easily try one. Frys has one for $4. 75 ohms. -- 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.
[time-nuts] beta tester needed: hp5370 processor replacement project
At the size that it is, OSH Park boards will be a bit pricey. I would look at SeeedStudio's Fusion service. 50 4x6 boards with ENIG gold finish would be less than $200. Both places do very good work... http://www.seeedstudio.com/service/index.php?r=site/pcbService ___ 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] Splitter for GPS antenna suggestions?
I have also been using a satellite splitter which as has been mentioned will pass the DC through and works well with a VIC-100 which has very high gain. My splitter has diodes from both outputs to the input so either receiver will power the antenna. The problem with also using a satellite amplifier is that it requires something like 16V so needs a separate supply. 73, David N1HAC On 10/25/13 7:01 PM, Chuck Forsberg WA7KGX wrote: Splitters for satellite TV pass DC to/from one receiver and block it for the others. The GPS frequency is well within the satellite downlink frequencies. Satellite TV line amps may come in handy if the signal gets too weak after splitting. On 10/25/2013 03:31 PM, Frank Hughes wrote: Hi, I want to see if it is possible to feed both the Trimble TB and the Jackson Labs Fury from the existing antenna. It appears both the TB and the Fury are 5vdc antenna power. Checked the auction site for splitters, but before I randomly buy anything, could someone please suggest what they use that works? Thanks, and 73 Frank KJ4OLL ___ 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] Splitter for GPS antenna suggestions?
Seems to me that most splitters I've seen will not pass the 5 V to the antenna since they usually have transformers that make the input and output at DC ground. You'd have to decide which DO will feed the antenna voltage and get it there somehow. Then is the other one going to give you an 'open/shorted antenna'? I suppose you could arrange some capacitive bypass somehow to one unit. There may be some new units out there that will do it and are powered/amplified also, but I'm thinking of just passive splitters, if the signals are good you'll only loose about 3.5 dB to each one. I may be completely off base here, but you need to think about how the antenna is going to get powered and you're not shorting the 5V from the units to ground. Dave N3DT ___ 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] Time stamping with a PICPET
Hi, I have some PICPETs made by TVB. They take a 10MHz clock, and on receiving a pulse trigger, they send out a 19200 Baud RS232 time stamp word. My query is can they be fed straight into a serial port? What about logic levels? Would a serial/USB converter get them into a laptop? What applications are available to receive the data and make an ASCII file that can be read by a spreadsheet or other data reduction program. There used to be all sorts of Monitor programs for PCs but I can not see any on recent machines. I want to log one second signals from a pendulum to analyse its precision. The device looks ideal for this task. thanks, Neville Michie ___ 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] Splitter for GPS antenna suggestions?
Hello -- I'm not very knowledgeable electronically, but I am currently using a Minicircuits ZAPD-3DB-1575-3 splitter to connect one TrueTime 142-400 GPS antenna to a Spectracom 8183 and a Spectracom 8183-A. I use the Spectracoms only as precise digital clocks, and they seem to work just fine. I bought the Minicircuits splitter on eBay for $30, buy-it-now, as I recall, but it's been a while ago. Hope that's helpful. David in Oklahoma City -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Frank Hughes Sent: Friday, October 25, 2013 5:31 PM To: time-nuts@febo.com Subject: [time-nuts] Splitter for GPS antenna suggestions? Hi, I want to see if it is possible to feed both the Trimble TB and the Jackson Labs Fury from the existing antenna. It appears both the TB and the Fury are 5vdc antenna power. Checked the auction site for splitters, but before I randomly buy anything, could someone please suggest what they use that works? Thanks, and 73 Frank KJ4OLL ___ 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] Time stamping with a PICPET
What kind of accuracy do the picket's have. You can log pulses using the PPS system on bare PC hardware and get the time of the pulse logged to within about 2 uSec. Simply connect the pulse to DCD line of a real serial port. If you need better than 2 uSec then yes you need external hardware. If those pickets are much better than 2 uSec then they make a GREAT front end for a NTP server. Question: how do you transfer accurate time into the PIC? How to get the serial data to a file? Just cat the port to a file. No software required On Fri, Oct 25, 2013 at 9:46 PM, Neville Michie namic...@gmail.com wrote: Hi, I have some PICPETs made by TVB. They take a 10MHz clock, and on receiving a pulse trigger, they send out a 19200 Baud RS232 time stamp word. My query is can they be fed straight into a serial port? What about logic levels? Would a serial/USB converter get them into a laptop? What applications are available to receive the data and make an ASCII file that can be read by a spreadsheet or other data reduction program. There used to be all sorts of Monitor programs for PCs but I can not see any on recent machines. I want to log one second signals from a pendulum to analyse its precision. The device looks ideal for this task. thanks, Neville Michie ___ 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] Splitter for GPS antenna suggestions?
This may be the lowest priced unit that will split a signal AND pass the 5 volts DC from one receiver while not shorting the other receiver. And as I said, reasonable price. Steren-201-232-2GHz-2-Way-Splitterhttp://www.amazon.com/Steren-201-232-2GHz-2-Way-Splitter/dp/B000KKFJRE/ref=sr_1_2?s=electronicsie=UTF8qid=1382764997sr=1-2keywords=1ghz+splitter+satellite+dc+power On Fri, Oct 25, 2013 at 9:58 PM, David okdavid5...@cox.net wrote: Hello -- I'm not very knowledgeable electronically, but I am currently using a Minicircuits ZAPD-3DB-1575-3 splitter to connect one TrueTime 142-400 GPS antenna to a Spectracom 8183 and a Spectracom 8183-A. I use the Spectracoms only as precise digital clocks, and they seem to work just fine. I bought the Minicircuits splitter on eBay for $30, buy-it-now, as I recall, but it's been a while ago. Hope that's helpful. David in Oklahoma City -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Frank Hughes Sent: Friday, October 25, 2013 5:31 PM To: time-nuts@febo.com Subject: [time-nuts] Splitter for GPS antenna suggestions? Hi, I want to see if it is possible to feed both the Trimble TB and the Jackson Labs Fury from the existing antenna. It appears both the TB and the Fury are 5vdc antenna power. Checked the auction site for splitters, but before I randomly buy anything, could someone please suggest what they use that works? Thanks, and 73 Frank KJ4OLL ___ 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. -- 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] Time stamping with a PICPET
namic...@gmail.com said: There used to be all sorts of Monitor programs for PCs but I can not see any on recent machines. I want to log one second signals from a pendulum to analyse its precision. The device looks ideal for this task. What are you going to use as a reference clock? If you can convert your one-second ticks into a TTL signal and feed that to a Linux box, the PPS stuff will allow you to log the data. That uses your local clock as the reference which is probably pretty close if you are running ntpd. (But since this is time-nuts, who says pretty close is good enough?) Here is a simple python script to log the data: http://www.febo.com/pipermail/time-nuts/2011-September/058907.html It was targeted at 60 Hz but should work OK at 1 Hz. -- 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.
