[time-nuts] time-nuts Digest, Vol 117, Issue 52
BD Systems Inc.
bdsysco at yahoo.com
Wed Apr 16 11:39:50 EDT 2014
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, "time-nuts-request at febo.com" <time-nuts-request at febo.com> wrote:
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Today's Topics:
1. Trak Systems (Glenn Little)
2. Re: Software for use HP 82350B gpib card. (lists at medesign.ro)
3. Re: Measuring the accurcy of a wrist watch (Max Robinson)
4. Re: Software for use HP 82350B gpib card (mihai at rubyquartz.com)
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 <glennmaillist at bellsouth.net>
To: Time-Nuts list <time-nuts at febo.com>
Subject: [time-nuts] Trak Systems
Message-ID: <mailman.4931.1397581392.2066.time-nuts at febo.com>
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: lists at medesign.ro
To: "Discussion of precise time and frequency measurement"
<time-nuts at febo.com>
Subject: Re: [time-nuts] Software for use HP 82350B gpib card.
Message-ID:
<1252.86.123.169.185.1397575644.squirrel at webmail.medesign.ro>
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
>
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------------------------------
Message: 3
Date: Tue, 15 Apr 2014 10:39:53 -0500
From: "Max Robinson" <max at maxsmusicplace.com>
To: "Tom Van Baak" <tvb at leapsecond.com>, "Discussion of precise time
and frequency measurement" <time-nuts at febo.com>
Subject: Re: [time-nuts] Measuring the accurcy of a wrist watch
Message-ID: <0F8B3F7BBB214A469856F7623B0D4326 at 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: max at maxsmusicplace.com
Transistor site http://www.funwithtransistors.net/
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----- Original Message -----
From: "Tom Van Baak" <tvb at LeapSecond.com>
To: "Discussion of precise time and frequency measurement"
<time-nuts at febo.com>
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
>
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------------------------------
Message: 4
Date: Tue, 15 Apr 2014 11:06:26 -0400 (EDT)
From: mihai at rubyquartz.com
To: time-nuts at febo.com
Subject: Re: [time-nuts] Software for use HP 82350B gpib card
Message-ID: <1397574386.53834945 at apps.rackspace.com>
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 <wb0gaz at yahoo.com>
To: time-nuts at febo.com
Subject: [time-nuts] Looking for GPSDO for home use
Message-ID:
<1397575628.2956.BPMail_high_carrier at web164605.mail.gq1.yahoo.com>
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
wb0gaz at yahoo.com
------------------------------
Message: 6
Date: Tue, 15 Apr 2014 09:27:37 -0700
From: Jim Lux <jimlux at earthlink.net>
To: Discussion of precise time and frequency measurement
<time-nuts at febo.com>
Subject: Re: [time-nuts] GPS antenna in silicon/RTV encapsulation
Message-ID: <534D5DF9.9010800 at earthlink.net>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
On 4/15/14, 8:13 AM, EWKehren at aol.com 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 <cfharris at erols.com>
To: Discussion of precise time and frequency measurement
<time-nuts at febo.com>
Subject: Re: [time-nuts] Measuring the accurcy of a wrist watch
Message-ID: <534D5DCA.2000305 at erols.com>
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 <dave.martindale at gmail.com>
To: time-nuts at febo.com
Subject: Re: [time-nuts] Measuring the accurcy of a wrist watch
Message-ID: <534D614A.9000509 at gmail.com>
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 -- time-nuts at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
------------------------------
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