Re: Trak Systems If you wish to use the reader function, you will need a source of IRIG B time code (1KHz carrier). Switch the front panel switch to Read and connect the IRIG code to the CODE IN BNC. If you wish to use it as a generator, switch the front panel switch to GEN, preset the time and switch the front panel switch to RUN. IRIG B code should appear at the IRIG B OUT BNC.
BD Systems On Tuesday, April 15, 2014 11:04 AM, "[email protected]" <[email protected]> wrote: Send time-nuts mailing list submissions to [email protected] 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 [email protected] You can reach the person managing the list at [email protected] When replying, please edit your Subject line so it is more specific than "Re: Contents of time-nuts digest..." Today's Topics: 1. Trak Systems (Glenn Little) 2. Re: Software for use HP 82350B gpib card. ([email protected]) 3. Re: Measuring the accurcy of a wrist watch (Max Robinson) 4. Re: Software for use HP 82350B gpib card ([email protected]) 5. Looking for GPSDO for home use (David Feldman) 6. Re: GPS antenna in silicon/RTV encapsulation (Jim Lux) 7. Re: Measuring the accurcy of a wrist watch (Chuck Harris) 8. Re: Measuring the accurcy of a wrist watch (Dave Martindale) ---------------------------------------------------------------------- Message: 1 Date: Tue, 15 Apr 2014 11:22:31 -0400 From: Glenn Little <[email protected]> To: Time-Nuts list <[email protected]> Subject: [time-nuts] Trak Systems Message-ID: <[email protected]> Content-Type: text/plain; charset="us-ascii"; format=flowed I have a Trak Systems time code generator/reader. This is model number 8396-2. I am looking for a service manual so that I can hook this up to display time code. An email to Trak Systems does not get an answer. Can any one help with any information on this unit?? Thanks 73 Glenn WB4UIV ------------------------------ Message: 2 Date: Tue, 15 Apr 2014 18:27:24 +0300 (EEST) From: [email protected] To: "Discussion of precise time and frequency measurement" <[email protected]> Subject: Re: [time-nuts] Software for use HP 82350B gpib card. Message-ID: <[email protected]> Content-Type: text/plain;charset=iso-8859-1 Timelab 1.2 works with 82350B/Agilent IO Libraries Suite (16.2.15823.0) on windoze XPire. Tested with 53131A and 5334B (as 5335A). > Hi, > > I need any software to work with HP5335a or hp 5370B witch work with the > 82350B gpib card. > Timelab only works with national instruments IEEE488.2 compatible devices. > Can anyone help? > > Rui Martins > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > ------------------------------ Message: 3 Date: Tue, 15 Apr 2014 10:39:53 -0500 From: "Max Robinson" <[email protected]> To: "Tom Van Baak" <[email protected]>, "Discussion of precise time and frequency measurement" <[email protected]> Subject: Re: [time-nuts] Measuring the accurcy of a wrist watch Message-ID: <0F8B3F7BBB214A469856F7623B0D4326@BACKROOM> Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original In the United States we can buy analog quarts watches from Wal-Mart for under 15 dollars. When the battery dies you don't even bother to replace it you just buy a new watch, unless...the one you have is very good. There is a lot of variation and buying one is the luck of the draw. They can be as bad as 1 minute a month and they always seem to be gaining. Right now I have one that gains about 2 seconds a month. I fully intend to see if it is possible to replace the battery when it runs down. Counting motor pulses seems to be a little impractical because it would take 12 days to get to 1e6 accuracy. Regards. Max. K 4 O DS. Email: [email protected] Transistor site http://www.funwithtransistors.net/ Vacuum tube site: http://www.funwithtubes.net/ Woodworking site http://www.angelfire.com/electronic/funwithtubes/Woodworking/wwindex.html Music site: http://www.maxsmusicplace.com/ To subscribe to the fun with transistors group send an email to. [email protected] To subscribe to the fun with tubes group send an email to, [email protected] To subscribe to the fun with wood group send a blank email to [email protected] ----- Original Message ----- From: "Tom Van Baak" <[email protected]> To: "Discussion of precise time and frequency measurement" <[email protected]> Sent: Tuesday, April 15, 2014 8:52 AM Subject: Re: [time-nuts] Measuring the accurcy of a wrist watch >> Some research has shown that there is an comparable instrument for ANALOG >> quarz watches. As far as I understand it does not try to detect the quarz >> frequency but detects magnetic pulses from the step motors that move the >> hands of the watch. >> >> Has anyone of you ever tried to do this in a time nuts laboratory? > > Ulrich, > > Yes, this works well, for both those with seconds hands (one magnetic > pulse per second) and those with only minute/hour hands (one or two steps > per minute). A large coil of wire is all you need. Have a look at the > watch timing tools and sensors at http://www.bmumford.com/microset.htmlor > http://www.bmumford.com/mset/modelwatch1.html > > Here's an example using a magnetic sensor: > http://leapsecond.com/pages/Junghans/ > > /tvb > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. --- This email is free from viruses and malware because avast! Antivirus protection is active. http://www.avast.com/ ------------------------------ Message: 4 Date: Tue, 15 Apr 2014 11:06:26 -0400 (EDT) From: [email protected] To: [email protected] Subject: Re: [time-nuts] Software for use HP 82350B gpib card Message-ID: <[email protected]> Content-Type: text/plain;charset=UTF-8 You should be able to use the 82350B gpib card with labview, try installing the agilent i/o suite to do a quick test. If you don?t have access to labview, or not familiar with it, I recommend using python with pyvisa. The card is VISA compatible, so it should work with little tinkering and proper drivers. Kind regards, Mihai ------------------------------ Message: 5 Date: Tue, 15 Apr 2014 08:27:08 -0700 (PDT) From: David Feldman <[email protected]> To: [email protected] Subject: [time-nuts] Looking for GPSDO for home use Message-ID: <[email protected]> Content-Type: text/plain; charset=us-ascii I found this reflector after searching for GPSDO that would be suitable for individual purchase/use. Each time I found an article about GPSDO projects, that lead me to a surplus GPS module that is either no longer available, not current production, undocumented, or otherwise difficult to source. I don't mind doing my own building/integration, and am not adverse to starting with a used or suplus component, I'm not sure where to start in terms of sourcing the GPS module/antenna/etc. My main need is for something to serve as a primary frequency standard (i.e., 10 MHz output) I can use to set a voltage controlled OCXO I just installed in my (otherwise cheap chinese) frequency counter. It seems there are some modules that have/had 10 kHz output; that would work too. Even 1 PPS output seems like a workable starting point, but at the expense of a different and/or more difficult path to get to a 10 MHz reference signal I seek. Any advance or pointer to source (reasonable cost, whatever that means!) would be appreciated. Thanks! Dave [email protected] ------------------------------ Message: 6 Date: Tue, 15 Apr 2014 09:27:37 -0700 From: Jim Lux <[email protected]> To: Discussion of precise time and frequency measurement <[email protected]> Subject: Re: [time-nuts] GPS antenna in silicon/RTV encapsulation Message-ID: <[email protected]> Content-Type: text/plain; charset=ISO-8859-1; format=flowed On 4/15/14, 8:13 AM, [email protected] wrote: > Working off list on a super high performance GPSDO but low cost thanks to a > time nut (sorry forgot his name) he directed me to DX.com which have ublox > with antenna for lwss than $ 23. Super performance and though they are out > of the one with 1 pps all you have to do is solder directly to the module. > Have both versions. Attached you see what I did with the antenna but found > out the hard way that when it rains the concave bottom fills with water, > still works but not as good. So last night I made it flat with 3M Marine > 5200 slow cure that I have extensive experience with from boating. Will take > a > full week to cure but if it does not work I can always remove it and start > over > There is a similar approach using a small "display dome" which is basically a round bottom beaker kind of shape designed to go on a wooden base. It can just as easily go on a big cork or stopper, or a disk cut out of a HDPE cutting board. Googling "display dome" will show you copious choices. or somewhere like "glassdomes.com" Of course, if you have a supply of canning jars or babyfood jars, then you can use those. Nothing says the jar has to be mounted with the axis vertical. You could do it sideways (like a ship in a bottle) to help solve the "rain in the punt" problem. ------------------------------ Message: 7 Date: Tue, 15 Apr 2014 12:26:50 -0400 From: Chuck Harris <[email protected]> To: Discussion of precise time and frequency measurement <[email protected]> Subject: Re: [time-nuts] Measuring the accurcy of a wrist watch Message-ID: <[email protected]> Content-Type: text/plain; charset=UTF-8; format=flowed You don't count the pulses, you measure the separation between the pulses. Just like with the 1PPS output on your C-Beam. -Chuck Harris Max Robinson wrote: > In the United States we can buy analog quarts watches from Wal-Mart for under > 15 > dollars. When the battery dies you don't even bother to replace it you just > buy a > new watch, unless...the one you have is very good. There is a lot of > variation and > buying one is the luck of the draw. They can be as bad as 1 minute a month > and they > always seem to be gaining. Right now I have one that gains about 2 seconds a > month. > I fully intend to see if it is possible to replace the battery when it runs > down. > Counting motor pulses seems to be a little impractical because it would take > 12 days > to get to 1e6 accuracy. > > Regards. > > Max. K 4 O DS. ------------------------------ Message: 8 Date: Tue, 15 Apr 2014 12:41:46 -0400 From: Dave Martindale <[email protected]> To: [email protected] Subject: Re: [time-nuts] Measuring the accurcy of a wrist watch Message-ID: <[email protected]> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Here is a discussion forum page that shows a commercial quartz watch timing machine in use: http://omegaforums.net/threads/quartz-watches-some-information-some-may-find-interesting.5475/ The machine obviously measures the time of each second "tick", either electrically or acoustically, because it can tell you the instantaneous rate over one second based on the time between ticks. In the example shown, the crystal is fast by 4.18 seconds/day (48 PPM) based on the period between most ticks, but every 60th tick has a longer period due to inhibition (oscillator pulse dropping), and the net rate measured over 60 seconds is 0.32 seconds/day (3.7 PPM). There is a bunch of additional information about the motor drive pulses too. The article explains what it means in some detail. It seems to me that calculating the rate information should require nothing more than capturing the leading edge of each motor pulse and time stamping it, at a rate of 1 data point per second. The motor information requires capturing several pulses (at a rate of a few kHz max.) every second. - Dave On 15/04/2014 09:52, Tom Van Baak wrote: >> Some research has shown that there is an comparable instrument for ANALOG >> quarz watches. As far as I understand it does not try to detect the quarz >> frequency but detects magnetic pulses from the step motors that move the >> hands of the watch. >> >> Has anyone of you ever tried to do this in a time nuts laboratory? > Ulrich, > > Yes, this works well, for both those with seconds hands (one magnetic pulse > per second) and those with only minute/hour hands (one or two steps per > minute). A large coil of wire is all you need. Have a look at the watch > timing tools and sensors at http://www.bmumford.com/microset.htmlor > http://www.bmumford.com/mset/modelwatch1.html > > Here's an example using a magnetic sensor: > http://leapsecond.com/pages/Junghans/ > > /tvb > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. ------------------------------ _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts End of time-nuts Digest, Vol 117, Issue 52 ****************************************** _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
