[time-nuts] Measuring a TAPR TICC resolution

[Mark Sims]

I recently taught Lady Heather how to calculate real time histograms of the 
various plots.   

While characterizing the performance of a UCT-8663 DOCXO installed in a 
HP-53132A counter (using the Gerry Sweeny board),  I enabled the histogram 
feature and got a nice plot showing the TAPR TICC time interval resolution.  

The TICC was configured for timestamp mode with chA=counter 10 MHz output to a 
TADD2-mini divider,  chB=5071A 1PPS, TICC clock=5071A 10 MHz.   The TICC time 
interval resolution is clearly visible... the bin peaks are 54.471 ps apart.___
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Re: [time-nuts] Papers on timing for lunar laser ranging

[paul swed]

Top unit is the GR 1164 synth sig gen.
I see what looks like an HP 105 but a slightly modified one.
Also the Sulzer.
Stuff on the left looks home brew.
Regards
Paul
WB8TSL

On Wed, Jul 12, 2017 at 3:27 PM, Tom Van Baak  wrote:

> 2 items:
>
> 1) I ran across another link related to lunar timing. Last year Carroll
> Alley died (89). To me he's famous for his cesium and H-maser relativity
> experimence in the 1970's. But he was also the PI for the Apollo Lunar
> Laser Ranging Retroreflector experiments. More info here:
>
> https://www.nasa.gov/vision/space/features/21jul_llr.html
>
> http://umdphysics.umd.edu/about-us/news/department-news/
> 1128-carroll-alley-june-13-1927-february-24-2016.html#!
> Alley_Lunar_Laser_Ranging_Retroreflector_1
>
> https://en.wikipedia.org/wiki/Carroll_Alley
>
> 2) That second link above has some wonderful photos.
>
> http://umdphysics.umd.edu/images/igallery/resized/1-100/
> Alley_Lunar_Laser_Ranging_Retroreflector_1-99-700-300-100-c.jpg
>
> Spot the Austron 1250A, Sulzer 2.5, and GenRad(?) quartz frequency
> standards. Anyone recognize more gear?
>
> /tvb
>
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Re: [time-nuts] Happy Palindromic Days, m-dd-yyyy format

[Bob kb8tq]

Hi


> On Jul 12, 2017, at 4:02 PM, Gregory Beat  wrote:
> 
> A palindrome is a word, phrase, number, or other sequence of characters which 
> reads the same backward as forward, such as the words: madam, racecar, or 
> tattarrattat.
> 
> Palindrome Days start with July 10, through July 19.
> https://www.timeanddate.com/date/palindrome-day.html 
> 

You *know* you have been at this to long and possibly infected those around you 
when 
you pass that tidbit on to the wife and the answer is “of course it is, didn’t 
you know?” :)

Bob


> 
> 7-10-17 backwards is 7-10-17
> 7-19-17 backwards is 7-19-17
> ==
> w9gb
> Sent from iPad Air
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[time-nuts] Happy Palindromic Days, m-dd-yyyy format

[Gregory Beat]

A palindrome is a word, phrase, number, or other sequence of characters which 
reads the same backward as forward, such as the words: madam, racecar, or 
tattarrattat.

Palindrome Days start with July 10, through July 19.
https://www.timeanddate.com/date/palindrome-day.html

7-10-17 backwards is 7-10-17
7-19-17 backwards is 7-19-17
==
w9gb
Sent from iPad Air
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Re: [time-nuts] Papers on timing for lunar laser ranging

[Tim Shoppa]

The gizmo with a CRT is a Specific Products WWV receiver. I'm not sure exactly 
which model, some had the ability to show on the CRT the CRT phase between 
local clock and WWV via pips, others would show phase via Lissajous figures.

Tim N3QE

> On Jul 12, 2017, at 4:46 PM, Bob kb8tq  wrote:
> 
> HI
> 
>> On Jul 12, 2017, at 3:27 PM, Tom Van Baak  wrote:
>> 
>> 2 items:
>> 
>> 1) I ran across another link related to lunar timing. Last year Carroll 
>> Alley died (89). To me he's famous for his cesium and H-maser relativity 
>> experimence in the 1970's. But he was also the PI for the Apollo Lunar Laser 
>> Ranging Retroreflector experiments. More info here:
>> 
>> https://www.nasa.gov/vision/space/features/21jul_llr.html
>> 
>> http://umdphysics.umd.edu/about-us/news/department-news/1128-carroll-alley-june-13-1927-february-24-2016.html#!Alley_Lunar_Laser_Ranging_Retroreflector_1
>> 
>> https://en.wikipedia.org/wiki/Carroll_Alley
>> 
>> 2) That second link above has some wonderful photos.
>> 
>> http://umdphysics.umd.edu/images/igallery/resized/1-100/Alley_Lunar_Laser_Ranging_Retroreflector_1-99-700-300-100-c.jpg
>> 
>> Spot the Austron 1250A, Sulzer 2.5, and GenRad(?) quartz frequency 
>> standards. Anyone recognize more gear?
> 
> Like the GR synthesizer above the GR frequency standard? Both are from the 
> “dark gray” era rather than the later “light gray” period. 
> 
> Not quite sure about the gizmo top left (next to the Austron) with the CRT? 
> in the middle of the pannel. 
> 
> Bob
> 
>> 
>> /tvb
>> 
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Re: [time-nuts] Papers on timing for lunar laser ranging

[Bob kb8tq]

HI

> On Jul 12, 2017, at 3:27 PM, Tom Van Baak  wrote:
> 
> 2 items:
> 
> 1) I ran across another link related to lunar timing. Last year Carroll Alley 
> died (89). To me he's famous for his cesium and H-maser relativity 
> experimence in the 1970's. But he was also the PI for the Apollo Lunar Laser 
> Ranging Retroreflector experiments. More info here:
> 
> https://www.nasa.gov/vision/space/features/21jul_llr.html
> 
> http://umdphysics.umd.edu/about-us/news/department-news/1128-carroll-alley-june-13-1927-february-24-2016.html#!Alley_Lunar_Laser_Ranging_Retroreflector_1
> 
> https://en.wikipedia.org/wiki/Carroll_Alley
> 
> 2) That second link above has some wonderful photos.
> 
> http://umdphysics.umd.edu/images/igallery/resized/1-100/Alley_Lunar_Laser_Ranging_Retroreflector_1-99-700-300-100-c.jpg
> 
> Spot the Austron 1250A, Sulzer 2.5, and GenRad(?) quartz frequency standards. 
> Anyone recognize more gear?

Like the GR synthesizer above the GR frequency standard? Both are from the 
“dark gray” era rather than the later “light gray” period. 

Not quite sure about the gizmo top left (next to the Austron) with the CRT? in 
the middle of the pannel. 

Bob
 
> 
> /tvb
> 
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Re: [time-nuts] Papers on timing for lunar laser ranging

[Tom Van Baak]

2 items:

1) I ran across another link related to lunar timing. Last year Carroll Alley 
died (89). To me he's famous for his cesium and H-maser relativity experimence 
in the 1970's. But he was also the PI for the Apollo Lunar Laser Ranging 
Retroreflector experiments. More info here:

https://www.nasa.gov/vision/space/features/21jul_llr.html

http://umdphysics.umd.edu/about-us/news/department-news/1128-carroll-alley-june-13-1927-february-24-2016.html#!Alley_Lunar_Laser_Ranging_Retroreflector_1

https://en.wikipedia.org/wiki/Carroll_Alley

2) That second link above has some wonderful photos.

http://umdphysics.umd.edu/images/igallery/resized/1-100/Alley_Lunar_Laser_Ranging_Retroreflector_1-99-700-300-100-c.jpg

Spot the Austron 1250A, Sulzer 2.5, and GenRad(?) quartz frequency standards. 
Anyone recognize more gear?

/tvb

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Re: [time-nuts] RS232 output on a 53181A

[Bob kb8tq]

Hi

There may well be multiple EEROM’s in the 53181 and 5313x counters. At least 
when I have blown up the EEPROM in them, it comes back with a error. I haven’t 
blown any up since the early 1980’s so I don’t quite remember the exact error 
message involved. Had it simply failed silently, I would have never noticed the 
problem.

Bob

> On Jul 12, 2017, at 10:39 AM, Angus  wrote:
> 
> Hi,
> 
> I've just been using an Agilent 53181A, but the serial output is not
> quite what I had expected. On the 53131A's that I've used the
> placeholder character on the RS232 output is an asterisk, but with
> this unit it is a lower case 'p'. Where the 53131A sends '2,*** u',
> this 53181A send '2,ppp u'. The only references to a placeholder that
> I saw in the manuals referred to an asterisk.
> 
> The firmware version is 4613.
> 
> Anyway, just wondering if anyone knows if this is correct, or maybe
> it's just the EPROM starting to fail.
> 
> Thanks,
> Angus.
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Re: [time-nuts] RS232 output on a 53181A

[Jim Harman]

Well ASCII * is 2a in Hex, p is 70 so that seems an unlikely substitution
for a failing EPROM.

But 0 is 30 Hex, only one bit different from p.

On Wed, Jul 12, 2017 at 10:39 AM, Angus  wrote:

> Hi,
>
> I've just been using an Agilent 53181A, but the serial output is not
> quite what I had expected. On the 53131A's that I've used the
> placeholder character on the RS232 output is an asterisk, but with
> this unit it is a lower case 'p'. Where the 53131A sends '2,*** u',
> this 53181A send '2,ppp u'. The only references to a placeholder that
> I saw in the manuals referred to an asterisk.
>
> The firmware version is 4613.
>
> Anyway, just wondering if anyone knows if this is correct, or maybe
> it's just the EPROM starting to fail.
>
> Thanks,
> Angus.
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>



-- 

--Jim Harman
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Re: [time-nuts] GPS Units in Z3801A

[Clint Jay]

Well that's handy to know, I've got a box of those I picked up from a
hamfest. I'll have to dig them out and test them

On 12 Jul 2017 2:55 pm, "Pete Lancashire"  wrote:

> I may have more of replacement Motorola GPS receiver modules. I had been
> sorting out stuff in storage
> and ran across some boxes that came from the same source the last batch
> came from. It maybe a couple
> weeks before I can find out. My dance card is pretty full for the next
> couple weeks and weekends.
>
> The pictures from last year
>
> http://petelancashire.com/gallery/main.php?g2_itemId=5249
>
> -pete
>
>
>
>
>
>
> On Tue, Jul 11, 2017 at 3:27 PM, Hal Murray 
> wrote:
>
> >
> > I have a Z3801A that has lost contact with GPS.  The GPS module is
> working
> > -
> > the list of not-tracking  satellites changes occasionally, but it never
> > tracks anything.  I've tried swapping antennas and such but that hasn't
> > helped.
> >
> > How often does the front end of the GPS module die?
> >
> > Will the newer 8 channel modules work in the Z3801A or do I need to
> locate
> > an
> > old 6 channel version?
> >
> > Is there a tells-all web page or message to this list about GPS modules
> for
> > the Z3801A?  I'd expect one, but I haven't found it.
> >
> > 
> >
> > I noticed that the UTC time from the status page is different from the T2
> > time.
> >
> > T220170719039300141
> >
> > The UTC clock seems to have gone crazy.  From the status page:
> > Tracking: 0Not Tracking: 6UTC  06:28:15 [?] 01
> Nov
> > 2018
> > Tracking: 0Not Tracking: 6UTC  06:28:15 [?] 22
> Aug
> > 2019
> > Tracking: 0Not Tracking: 6UTC  06:28:15 [?] 19
> Dec
> > 2019
> >
> > The T2 time is a day old.  My guess is that it pulled the time it's using
> > for
> > T2 from wherever it stores the log slots.
> >
> >
> >
> >
> > --
> > 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.
> >
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[time-nuts] RS232 output on a 53181A

[Angus]

Hi,

I've just been using an Agilent 53181A, but the serial output is not
quite what I had expected. On the 53131A's that I've used the
placeholder character on the RS232 output is an asterisk, but with
this unit it is a lower case 'p'. Where the 53131A sends '2,*** u',
this 53181A send '2,ppp u'. The only references to a placeholder that
I saw in the manuals referred to an asterisk.

The firmware version is 4613.

Anyway, just wondering if anyone knows if this is correct, or maybe
it's just the EPROM starting to fail.

Thanks,
Angus.
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Re: [time-nuts] GPS Units in Z3801A

[Pete Lancashire]

I may have more of replacement Motorola GPS receiver modules. I had been
sorting out stuff in storage
and ran across some boxes that came from the same source the last batch
came from. It maybe a couple
weeks before I can find out. My dance card is pretty full for the next
couple weeks and weekends.

The pictures from last year

http://petelancashire.com/gallery/main.php?g2_itemId=5249

-pete






On Tue, Jul 11, 2017 at 3:27 PM, Hal Murray  wrote:

>
> I have a Z3801A that has lost contact with GPS.  The GPS module is working
> -
> the list of not-tracking  satellites changes occasionally, but it never
> tracks anything.  I've tried swapping antennas and such but that hasn't
> helped.
>
> How often does the front end of the GPS module die?
>
> Will the newer 8 channel modules work in the Z3801A or do I need to locate
> an
> old 6 channel version?
>
> Is there a tells-all web page or message to this list about GPS modules for
> the Z3801A?  I'd expect one, but I haven't found it.
>
> 
>
> I noticed that the UTC time from the status page is different from the T2
> time.
>
> T220170719039300141
>
> The UTC clock seems to have gone crazy.  From the status page:
> Tracking: 0Not Tracking: 6UTC  06:28:15 [?] 01 Nov
> 2018
> Tracking: 0Not Tracking: 6UTC  06:28:15 [?] 22 Aug
> 2019
> Tracking: 0Not Tracking: 6UTC  06:28:15 [?] 19 Dec
> 2019
>
> The T2 time is a day old.  My guess is that it pulled the time it's using
> for
> T2 from wherever it stores the log slots.
>
>
>
>
> --
> These are my opinions.  I hate spam.
>
>
>
> ___
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>
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Re: [time-nuts] A milestone approaches

[Bill Riches]

Hi Tom

I passed this along to two of my old time computer gurus - I am sure they will 
want to celebrate!!

73,

Bill, WA2DVU
Cape May

-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Tom Van Baak
Sent: Wednesday, July 12, 2017 8:19 AM
To: Discussion of precise time and frequency measurement 
Subject: Re: [time-nuts] A milestone approaches

Hi Bill,

> Got this from a friend whose MN license plate is UNIX.

Join the club! There's ~50 of us in the US: http://leapsecond.com/pages/unix/


> At that instant, billions of Linux and Unix computers and devices

Plus embedded devices, such as Arduino, where 31-bit time_t C libraries are 
also used...


> return time() == 15.  It will not be until 2033 when that number 
> reaches 2 Billion.

Thanks for the notice. Add these to your list:

1414213562 0x544b2fba Sat Oct 25 06:06:02 2014 GMT (sqrt 2)
1415926535 0x54655307 Fri Nov 14 00:55:35 2014 GMT (pi)
1420405752 0x54a9abf8 Sun Jan 04 21:09:12 2015 GMT (H-maser Hz)
15 0x59682f00 Fri Jul 14 03:40:00 2017 GMT (1.5 billion)
1616161616 0x6054ab50 Fri Mar 19 13:46:56 2021 GMT (pretty in dec)
1616928864 0x60606060 Sun Mar 28 10:54:24 2021 GMT (pretty in hex)
1717171717 0x6659f605 Fri May 31 17:08:37 2024 GMT (dec looking like oct)
1886417008 0x70707070 Thu Oct 11 13:43:28 2029 GMT (pretty in hex)
1985229328 0x76543210 Sun Nov 28 04:35:28 2032 GMT (hex digit countdown)
20 0x77359400 Wed May 18 04:33:20 2033 GMT (2 billion)
2004318071 0x Thu Jul 07 04:01:11 2033 GMT (pretty in hex)
2147483647 0x7fff Tue Jan 19 03:14:07 2038 GMT (end of time)
2147483648 0x8000 Tue Jan 19 03:14:08 2038 GMT (you survived)

While we're at it, we have a rare T&F MJD event coming in 2023:

1968-05-24 00:00:00 UTC (DOY = 145, Fri) = JD 244.5 = MJD 4.0
1995-10-10 00:00:00 UTC (DOY = 283, Tue) = JD 245.5 = MJD 5.0
2023-02-25 00:00:00 UTC (DOY =  56, Sat) = JD 246.5 = MJD 6.0

/tvb

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Re: [time-nuts] A milestone approaches

[William H. Fite]

My spouse's license plate is BEFUNGE.


On Wednesday, July 12, 2017, Tom Van Baak  wrote:

> Hi Bill,
>
> > Got this from a friend whose MN license plate is UNIX.
>
> Join the club! There's ~50 of us in the US: http://leapsecond.com/pages/
> unix/
>
>
> > At that instant, billions of Linux and Unix computers and devices
>
> Plus embedded devices, such as Arduino, where 31-bit time_t C libraries
> are also used...
>
>
> > return time() == 15.  It will not be until 2033 when that number
> reaches 2 Billion.
>
> Thanks for the notice. Add these to your list:
>
> 1414213562 0x544b2fba Sat Oct 25 06:06:02 2014 GMT (sqrt 2)
> 1415926535 0x54655307 Fri Nov 14 00:55:35 2014 GMT (pi)
> 1420405752 0x54a9abf8 Sun Jan 04 21:09:12 2015 GMT (H-maser Hz)
> 15 0x59682f00 Fri Jul 14 03:40:00 2017 GMT (1.5 billion)
> 1616161616 0x6054ab50 Fri Mar 19 13:46:56 2021 GMT (pretty in dec)
> 1616928864 0x60606060 Sun Mar 28 10:54:24 2021 GMT (pretty in hex)
> 1717171717 0x6659f605 Fri May 31 17:08:37 2024 GMT (dec looking like oct)
> 1886417008 0x70707070 Thu Oct 11 13:43:28 2029 GMT (pretty in hex)
> 1985229328 0x76543210 Sun Nov 28 04:35:28 2032 GMT (hex digit countdown)
> 20 0x77359400 Wed May 18 04:33:20 2033 GMT (2 billion)
> 2004318071 0x Thu Jul 07 04:01:11 2033 GMT (pretty in hex)
> 2147483647 0x7fff Tue Jan 19 03:14:07 2038 GMT (end of time)
> 2147483648 0x8000 Tue Jan 19 03:14:08 2038 GMT (you survived)
>
> While we're at it, we have a rare T&F MJD event coming in 2023:
>
> 1968-05-24 00:00:00 UTC (DOY = 145, Fri) = JD 244.5 = MJD 4.0
> 1995-10-10 00:00:00 UTC (DOY = 283, Tue) = JD 245.5 = MJD 5.0
> 2023-02-25 00:00:00 UTC (DOY =  56, Sat) = JD 246.5 = MJD 6.0
>
> /tvb
>
> ___
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>


-- 
William H Fite, PhD
Independent Consultant
Statistical Analysis & Research Methods
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Re: [time-nuts] A milestone approaches

[Tom Van Baak]

Hi Bill,

> Got this from a friend whose MN license plate is UNIX.

Join the club! There's ~50 of us in the US: http://leapsecond.com/pages/unix/


> At that instant, billions of Linux and Unix computers and devices

Plus embedded devices, such as Arduino, where 31-bit time_t C libraries are 
also used...


> return time() == 15.  It will not be until 2033 when that number 
> reaches 2 Billion.

Thanks for the notice. Add these to your list:

1414213562 0x544b2fba Sat Oct 25 06:06:02 2014 GMT (sqrt 2)
1415926535 0x54655307 Fri Nov 14 00:55:35 2014 GMT (pi)
1420405752 0x54a9abf8 Sun Jan 04 21:09:12 2015 GMT (H-maser Hz)
15 0x59682f00 Fri Jul 14 03:40:00 2017 GMT (1.5 billion)
1616161616 0x6054ab50 Fri Mar 19 13:46:56 2021 GMT (pretty in dec)
1616928864 0x60606060 Sun Mar 28 10:54:24 2021 GMT (pretty in hex)
1717171717 0x6659f605 Fri May 31 17:08:37 2024 GMT (dec looking like oct)
1886417008 0x70707070 Thu Oct 11 13:43:28 2029 GMT (pretty in hex)
1985229328 0x76543210 Sun Nov 28 04:35:28 2032 GMT (hex digit countdown)
20 0x77359400 Wed May 18 04:33:20 2033 GMT (2 billion)
2004318071 0x Thu Jul 07 04:01:11 2033 GMT (pretty in hex)
2147483647 0x7fff Tue Jan 19 03:14:07 2038 GMT (end of time)
2147483648 0x8000 Tue Jan 19 03:14:08 2038 GMT (you survived)

While we're at it, we have a rare T&F MJD event coming in 2023:

1968-05-24 00:00:00 UTC (DOY = 145, Fri) = JD 244.5 = MJD 4.0
1995-10-10 00:00:00 UTC (DOY = 283, Tue) = JD 245.5 = MJD 5.0
2023-02-25 00:00:00 UTC (DOY =  56, Sat) = JD 246.5 = MJD 6.0

/tvb

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[time-nuts] GPS Units in Z3801A

[Mark Sims]

I've also had to replace one.   It had a lot of problems acquiring sats.   I 
believe the problem is that the TCXO on the board has drifted out of range.  I 
seem to remember seeing a post somewhere about that and there is supposed to be 
a fix.   Also, isn't the receiver a UT+ 8 channel unit?  Or was that the 53xxx?
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