Re: [time-nuts] Leap second glitches on NTP using Z3801A

[Harlan Stenn]

OK, so thanks for posting this, and I sitll invite you to submit a patch
via http://bug.ntp.org .

H

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Re: [time-nuts] Leap second glitches on NTP using Z3801A

[Harlan Stenn]

Scott wrote:
> Yes, I noticed this as well and modified the refclock driver to filter
> it as it does in the oncore refclock.
> 
>   Scott

If you submitted this patch to the NTP Project I didn't see it.

If you didn't submit it, I invite you to do so.

H

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Re: [time-nuts] Leap second glitches on NTP using Z3801A

[Tom Van Baak]

> Sorry for not forming my question better. I guess what I wanted to
> know is that given that the first leap second was in 1972 and that the
> first GPS satellite was launched in 1993. why was it decided to not
> incorporate leap seconds into how GPS "tells" time, but still alerts
> you to the fact that they are coming up? Or why was the decision made
> to have UTC-GPS different than UTC. My understanding is that they
> "tick" simultaneously but "tell" different times.(sorry for the
> overuse of quotes)  Is there some navigational reason? Is it actually
> intentional?
> 
> -eric

Oh yes, very intentional. Having to handle leap seconds in an
operational system is a real pain.

Systems that need an autonomous or continuous time scale
typically do not use UTC internally but translate to/from UTC
(e.g., in software). This holds for everything from a wristwatch
to a laptop to a GPS satellite.

/tvb


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Re: [time-nuts] Oh the horror

[Steve Rooke]

2008/11/17 Mark Sims <[EMAIL PROTECTED]>:
>
> A little duct tape and a dash of superglue and she'll be humming along just 
> fine...

Kia Ora!

Don't forget some number 8 wire to hold it all together mate.

73 for ZL land,
Steve
-- 
Steve Rooke - ZL3TUV & G8KVD
Omnium finis imminet

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Re: [time-nuts] Leap second glitches on NTP using Z3801A

[M. Warner Losh]

In message: <[EMAIL PROTECTED]>
"Eric Garner" <[EMAIL PROTECTED]> writes:
: Sorry for not forming my question better. I guess what I wanted to
: know is that given that the first leap second was in 1972 and that the
: first GPS satellite was launched in 1993. why was it decided to not
: incorporate leap seconds into how GPS "tells" time, but still alerts
: you to the fact that they are coming up? Or why was the decision made
: to have UTC-GPS different than UTC. My understanding is that they
: "tick" simultaneously but "tell" different times.(sorry for the
: overuse of quotes)  Is there some navigational reason? Is it actually
: intentional?

Leap seconds suck.  There's no reason to have them unless you need
time to sync up with the way that the earth is pointing.  GPS doesn't
need to synchronize to the earth's directions to solve for location,
so it saves a ton of hassles by just counting seconds since an
arbitrary epoch.  Since UTC is important, GPS's almanac gives the
conversion from GPS to UTC.

Warner


: -eric
: 
: On Sun, Nov 16, 2008 at 8:08 PM, Brooke Clarke <[EMAIL PROTECTED]> wrote:
: > Hi Eric:
: >
: > So that you can figure out UTC.  But there's no DST bit on any of the
: > satellites so for that you need a local time broadcast.
: >
: >
: > Have Fun,
: >
: > Brooke Clarke
: > http://www.prc68.com
: >
: > Eric Garner wrote:
: >> Ascending from Lurk Mode, I have a (possibly stupid) question: according to
: >>
: >> http://tycho.usno.navy.mil/leapsec.html
: >>
: >> and Tony Jones's book "The Story of Atomic Time" GPS time does not
: >> account for leap seconds, So why does it alert you to them?
: >>
: >> -eric
: >>
: >> On Sun, Nov 16, 2008 at 7:21 PM, Hal Murray <[EMAIL PROTECTED]> wrote:
: >>> Is anybody running ntpd with their Z3801A?
: >>>
: >>> If so, please check your log files and tell me if you see a bogus leap 
second
: >>> at the end of the past several months.  I've seen them for Aug, Sep, and 
Oct.
: >>>  I think they are coming from my Z3801A, but it might be something else.
: >>>
: >>> The GPS satellites are now announcing a leap second that will happen at 
the
: >>> end of the year.   The refclock driver passes that to ntpd and ntpd 
passes it
: >>> to the kernel and magic happens.
: >>>
: >>> I think the refclock-ntpd interface assumes the leap second will happen at
: >>> the end of the current month.  NIST only announces leap seconds a month 
ahead
: >>> on WWVB and ACTS.
: >>>
: >>> The Oncore refclock driver has a filter to wait until the current month to
: >>> pass the info to ntpd.  I'm working on something similar for the HP 
driver.
: >>>
: >>> --
: >>> These are my opinions, not necessarily my employer's.  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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: > To unsubscribe, go to 
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
: > and follow the instructions there.
: >
: 
: 
: 
: -- 
: --Eric
: _
: Eric Garner
: 
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: 

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Re: [time-nuts] Leap second glitches on NTP using Z3801A

[M. Warner Losh]

In message: <[EMAIL PROTECTED]>
"Eric Garner" <[EMAIL PROTECTED]> writes:
: Ascending from Lurk Mode, I have a (possibly stupid) question: according to
: 
: http://tycho.usno.navy.mil/leapsec.html
: 
: and Tony Jones's book "The Story of Atomic Time" GPS time does not
: account for leap seconds, So why does it alert you to them?

GPS's almanac contains the GPS to UTC offset (current, and future).
It is repeated every 20 minutes, which means it can take 20 minutes
for a cold startup to learn the current number of leapseconds...

Warner

: -eric
: 
: On Sun, Nov 16, 2008 at 7:21 PM, Hal Murray <[EMAIL PROTECTED]> wrote:
: > Is anybody running ntpd with their Z3801A?
: >
: > If so, please check your log files and tell me if you see a bogus leap 
second
: > at the end of the past several months.  I've seen them for Aug, Sep, and 
Oct.
: >  I think they are coming from my Z3801A, but it might be something else.
: >
: > The GPS satellites are now announcing a leap second that will happen at the
: > end of the year.   The refclock driver passes that to ntpd and ntpd passes 
it
: > to the kernel and magic happens.
: >
: > I think the refclock-ntpd interface assumes the leap second will happen at
: > the end of the current month.  NIST only announces leap seconds a month 
ahead
: > on WWVB and ACTS.
: >
: > The Oncore refclock driver has a filter to wait until the current month to
: > pass the info to ntpd.  I'm working on something similar for the HP driver.
: >
: > --
: > These are my opinions, not necessarily my employer's.  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.
: >
: 
: 
: 
: -- 
: --Eric
: _
: Eric Garner
: 
: ___
: time-nuts mailing list -- time-nuts@febo.com
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: and follow the instructions there.
: 
: 

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Re: [time-nuts] Leap second glitches on NTP using Z3801A

[Hal Murray]

> and Tony Jones's book "The Story of Atomic Time" GPS time does not
> account for leap seconds, So why does it alert you to them? 

You end up needing both with and without leap seconds.

GPS time is without leap seconds.  It also distributes the number of leap 
seconds that have been inserted since GPS started so you can translate GPS 
time into UTC.  So then you need a warning if one is coming up soon.

-- 
These are my opinions, not necessarily my employer's.  I hate spam.




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[time-nuts] 5061A Manual

[J. L. Trantham]

Does anyone know of a link to a 5061A Service Manual?  I found the
'Temporary Operating Manual' at the Agilent website.

Thanks,

Joe


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Re: [time-nuts] Leap second glitches on NTP using Z3801A

[Brooke Clarke]

Hi Eric:

The GPS time scale can not have any jumps or there would be corresponding 
position jumps.

Have Fun,

Brooke Clarke
http://www.prc68.com

Eric Garner wrote:
> Sorry for not forming my question better. I guess what I wanted to
> know is that given that the first leap second was in 1972 and that the
> first GPS satellite was launched in 1993. why was it decided to not
> incorporate leap seconds into how GPS "tells" time, but still alerts
> you to the fact that they are coming up? Or why was the decision made
> to have UTC-GPS different than UTC. My understanding is that they
> "tick" simultaneously but "tell" different times.(sorry for the
> overuse of quotes)  Is there some navigational reason? Is it actually
> intentional?
> 
> -eric
> 
> On Sun, Nov 16, 2008 at 8:08 PM, Brooke Clarke <[EMAIL PROTECTED]> wrote:
>> Hi Eric:
>>
>> So that you can figure out UTC.  But there's no DST bit on any of the
>> satellites so for that you need a local time broadcast.
>>
>>
>> Have Fun,
>>
>> Brooke Clarke
>> http://www.prc68.com
>>
>> Eric Garner wrote:
>>> Ascending from Lurk Mode, I have a (possibly stupid) question: according to
>>>
>>> http://tycho.usno.navy.mil/leapsec.html
>>>
>>> and Tony Jones's book "The Story of Atomic Time" GPS time does not
>>> account for leap seconds, So why does it alert you to them?
>>>
>>> -eric
>>>
>>> On Sun, Nov 16, 2008 at 7:21 PM, Hal Murray <[EMAIL PROTECTED]> wrote:
 Is anybody running ntpd with their Z3801A?

 If so, please check your log files and tell me if you see a bogus leap 
 second
 at the end of the past several months.  I've seen them for Aug, Sep, and 
 Oct.
  I think they are coming from my Z3801A, but it might be something else.

 The GPS satellites are now announcing a leap second that will happen at the
 end of the year.   The refclock driver passes that to ntpd and ntpd passes 
 it
 to the kernel and magic happens.

 I think the refclock-ntpd interface assumes the leap second will happen at
 the end of the current month.  NIST only announces leap seconds a month 
 ahead
 on WWVB and ACTS.

 The Oncore refclock driver has a filter to wait until the current month to
 pass the info to ntpd.  I'm working on something similar for the HP driver.

 --
 These are my opinions, not necessarily my employer's.  I hate spam.




 ___
 time-nuts mailing list -- time-nuts@febo.com
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 https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
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>>>
>>>
>> ___
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>> and follow the instructions there.
>>
> 
> 
> 

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Re: [time-nuts] Leap second glitches on NTP using Z3801A

[Tom Van Baak]

> Ascending from Lurk Mode, I have a (possibly stupid) question: according to
> http://tycho.usno.navy.mil/leapsec.html
> and Tony Jones's book "The Story of Atomic Time" GPS time does not
> account for leap seconds, So why does it alert you to them?

Eric,

"Does not account for" maybe isn't quite what happens, but
right, GPS time rolls along continuously without regard to
variations in astronomical time.

A leap second adjustment count is included in the GPS data
stream so that receivers can output true UTC time stamps, if
that conversion is required.

Some level of advanced warning of a leap second is necessary
so that when the moment arrives the receiver can either delete
the UTC second called 23:59:59 (negative leap second) or insert
an extra UTC second called 23:59:60 (positive leap second).

Theoretically, a GPS receiver might only need one second of
advanced warning to do the right thing in the last UTC second
of the last day of the month, but for a variety of good reasons,
a couple of days or even a couple of months of advanced
notice is better for everyone involved.

/tvb


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Re: [time-nuts] Leap second glitches on NTP using Z3801A

[Eric Garner]

Sorry for not forming my question better. I guess what I wanted to
know is that given that the first leap second was in 1972 and that the
first GPS satellite was launched in 1993. why was it decided to not
incorporate leap seconds into how GPS "tells" time, but still alerts
you to the fact that they are coming up? Or why was the decision made
to have UTC-GPS different than UTC. My understanding is that they
"tick" simultaneously but "tell" different times.(sorry for the
overuse of quotes)  Is there some navigational reason? Is it actually
intentional?

-eric

On Sun, Nov 16, 2008 at 8:08 PM, Brooke Clarke <[EMAIL PROTECTED]> wrote:
> Hi Eric:
>
> So that you can figure out UTC.  But there's no DST bit on any of the
> satellites so for that you need a local time broadcast.
>
>
> Have Fun,
>
> Brooke Clarke
> http://www.prc68.com
>
> Eric Garner wrote:
>> Ascending from Lurk Mode, I have a (possibly stupid) question: according to
>>
>> http://tycho.usno.navy.mil/leapsec.html
>>
>> and Tony Jones's book "The Story of Atomic Time" GPS time does not
>> account for leap seconds, So why does it alert you to them?
>>
>> -eric
>>
>> On Sun, Nov 16, 2008 at 7:21 PM, Hal Murray <[EMAIL PROTECTED]> wrote:
>>> Is anybody running ntpd with their Z3801A?
>>>
>>> If so, please check your log files and tell me if you see a bogus leap 
>>> second
>>> at the end of the past several months.  I've seen them for Aug, Sep, and 
>>> Oct.
>>>  I think they are coming from my Z3801A, but it might be something else.
>>>
>>> The GPS satellites are now announcing a leap second that will happen at the
>>> end of the year.   The refclock driver passes that to ntpd and ntpd passes 
>>> it
>>> to the kernel and magic happens.
>>>
>>> I think the refclock-ntpd interface assumes the leap second will happen at
>>> the end of the current month.  NIST only announces leap seconds a month 
>>> ahead
>>> on WWVB and ACTS.
>>>
>>> The Oncore refclock driver has a filter to wait until the current month to
>>> pass the info to ntpd.  I'm working on something similar for the HP driver.
>>>
>>> --
>>> These are my opinions, not necessarily my employer's.  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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> and follow the instructions there.
>



-- 
--Eric
_
Eric Garner

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Re: [time-nuts] Leap second glitches on NTP using Z3801A

[Scott Mace]

Here's the diff based on 4.2.4p4

--- ntp-4.2.4p4.orig/ntpd/refclock_hpgps.c  2006-06-06 15:16:51.0 
-0500
+++ ntp-4.2.4p4/ntpd/refclock_hpgps.c   2008-08-25 09:56:29.0 -0500
@@ -535,7 +535,8 @@
 switch (leapchar) {

 case '+':
-   pp->leap = LEAP_ADDSECOND;
+   if ((month == 6) || (month == 12))
+   pp->leap = LEAP_ADDSECOND;
 break;

 case '0':
@@ -543,7 +544,8 @@
 break;

 case '-':
-   pp->leap = LEAP_DELSECOND;
+   if ((month == 6) || (month == 12))
+   pp->leap = LEAP_DELSECOND;
 break;

 default:




Scott Mace wrote:
> Yes, I noticed this as well and modified the refclock driver to filter
> it as it does in the oncore refclock.
> 
>   Scott
> 
> Hal Murray wrote:
>> Is anybody running ntpd with their Z3801A?
>>
>> If so, please check your log files and tell me if you see a bogus leap 
>> second 
>> at the end of the past several months.  I've seen them for Aug, Sep, and 
>> Oct. 
>>  I think they are coming from my Z3801A, but it might be something else.
>>
>> The GPS satellites are now announcing a leap second that will happen at the 
>> end of the year.   The refclock driver passes that to ntpd and ntpd passes 
>> it 
>> to the kernel and magic happens.
>>
>> I think the refclock-ntpd interface assumes the leap second will happen at 
>> the end of the current month.  NIST only announces leap seconds a month 
>> ahead 
>> on WWVB and ACTS.
>>
>> The Oncore refclock driver has a filter to wait until the current month to 
>> pass the info to ntpd.  I'm working on something similar for the HP driver.
>>
> 
> ___
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> 
> 

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Re: [time-nuts] Leap second glitches on NTP using Z3801A

[Scott Mace]

Yes, I noticed this as well and modified the refclock driver to filter
it as it does in the oncore refclock.

Scott

Hal Murray wrote:
> Is anybody running ntpd with their Z3801A?
> 
> If so, please check your log files and tell me if you see a bogus leap second 
> at the end of the past several months.  I've seen them for Aug, Sep, and Oct. 
>  I think they are coming from my Z3801A, but it might be something else.
> 
> The GPS satellites are now announcing a leap second that will happen at the 
> end of the year.   The refclock driver passes that to ntpd and ntpd passes it 
> to the kernel and magic happens.
> 
> I think the refclock-ntpd interface assumes the leap second will happen at 
> the end of the current month.  NIST only announces leap seconds a month ahead 
> on WWVB and ACTS.
> 
> The Oncore refclock driver has a filter to wait until the current month to 
> pass the info to ntpd.  I'm working on something similar for the HP driver.
> 

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Re: [time-nuts] Leap second glitches on NTP using Z3801A

[Brooke Clarke]

Hi Eric:

So that you can figure out UTC.  But there's no DST bit on any of the 
satellites so for that you need a local time broadcast.


Have Fun,

Brooke Clarke
http://www.prc68.com

Eric Garner wrote:
> Ascending from Lurk Mode, I have a (possibly stupid) question: according to
> 
> http://tycho.usno.navy.mil/leapsec.html
> 
> and Tony Jones's book "The Story of Atomic Time" GPS time does not
> account for leap seconds, So why does it alert you to them?
> 
> -eric
> 
> On Sun, Nov 16, 2008 at 7:21 PM, Hal Murray <[EMAIL PROTECTED]> wrote:
>> Is anybody running ntpd with their Z3801A?
>>
>> If so, please check your log files and tell me if you see a bogus leap second
>> at the end of the past several months.  I've seen them for Aug, Sep, and Oct.
>>  I think they are coming from my Z3801A, but it might be something else.
>>
>> The GPS satellites are now announcing a leap second that will happen at the
>> end of the year.   The refclock driver passes that to ntpd and ntpd passes it
>> to the kernel and magic happens.
>>
>> I think the refclock-ntpd interface assumes the leap second will happen at
>> the end of the current month.  NIST only announces leap seconds a month ahead
>> on WWVB and ACTS.
>>
>> The Oncore refclock driver has a filter to wait until the current month to
>> pass the info to ntpd.  I'm working on something similar for the HP driver.
>>
>> --
>> These are my opinions, not necessarily my employer's.  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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Re: [time-nuts] Leap second glitches on NTP using Z3801A

[Eric Garner]

Ascending from Lurk Mode, I have a (possibly stupid) question: according to

http://tycho.usno.navy.mil/leapsec.html

and Tony Jones's book "The Story of Atomic Time" GPS time does not
account for leap seconds, So why does it alert you to them?

-eric

On Sun, Nov 16, 2008 at 7:21 PM, Hal Murray <[EMAIL PROTECTED]> wrote:
> Is anybody running ntpd with their Z3801A?
>
> If so, please check your log files and tell me if you see a bogus leap second
> at the end of the past several months.  I've seen them for Aug, Sep, and Oct.
>  I think they are coming from my Z3801A, but it might be something else.
>
> The GPS satellites are now announcing a leap second that will happen at the
> end of the year.   The refclock driver passes that to ntpd and ntpd passes it
> to the kernel and magic happens.
>
> I think the refclock-ntpd interface assumes the leap second will happen at
> the end of the current month.  NIST only announces leap seconds a month ahead
> on WWVB and ACTS.
>
> The Oncore refclock driver has a filter to wait until the current month to
> pass the info to ntpd.  I'm working on something similar for the HP driver.
>
> --
> These are my opinions, not necessarily my employer's.  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.
>



-- 
--Eric
_
Eric Garner

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[time-nuts] Leap second glitches on NTP using Z3801A

[Hal Murray]

Is anybody running ntpd with their Z3801A?

If so, please check your log files and tell me if you see a bogus leap second 
at the end of the past several months.  I've seen them for Aug, Sep, and Oct. 
 I think they are coming from my Z3801A, but it might be something else.

The GPS satellites are now announcing a leap second that will happen at the 
end of the year.   The refclock driver passes that to ntpd and ntpd passes it 
to the kernel and magic happens.

I think the refclock-ntpd interface assumes the leap second will happen at 
the end of the current month.  NIST only announces leap seconds a month ahead 
on WWVB and ACTS.

The Oncore refclock driver has a filter to wait until the current month to 
pass the info to ntpd.  I'm working on something similar for the HP driver.

-- 
These are my opinions, not necessarily my employer's.  I hate spam.




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Re: [time-nuts] Oh the horror

[Max Robinson]

Many times I have received shipments from well known electronics companies 
in which there was cushioning around and on top of the item but it was 
sitting on the bottom of the box.  No sign that the packing had shifted, it 
had been packed that way.

Regards.

Max.  K 4 O D S.

Email: [EMAIL PROTECTED]

Transistor site http://www.funwithtransistors.net
Vacuum tube site: http://www.funwithtubes.net
Music site: http://www.maxsmusicplace.com

To subscribe to the fun with tubes group send an email to,
[EMAIL PROTECTED]

- Original Message - 
From: "Brooke Clarke" <[EMAIL PROTECTED]>
To: "Discussion of precise time and frequency measurement" 

Sent: Sunday, November 16, 2008 4:22 PM
Subject: Re: [time-nuts] Oh the horror


> Hi:
>
> I've had my share of disaster shipments and most of them were the fault of 
> the
> sender's packaging, not the carrier.  See:
> http://www.prc68.com/I/Pack.shtml#WgW
> Including an FTS4060 band strapped to a pallet! (it did not survive)
>
> Have Fun,
>
> Brooke Clarke
> http://www.prc68.com
>
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>
> 


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Re: [time-nuts] Oh the horror

[Thomas A. Frank]

Since we're telling horror stories...

Circa 1990, I had a really nice strip chart recorder in a half height  
roll-around rack.  Shipped it to the field for some work, everything  
was fine.  Shipped it back; it made it all the way to our facilities  
heavy freight guys in perfect condition.  It was the last item all  
the way at the front of a 40 foot tractor-trailer...

Guy A rolls it quite vigorously toward the back of the truck where  
Guy B is waiting...and B watches and does nothing as it rolls right  
past him, off the end, and falls 4 feet to the pavement.  He then  
hops down, rights the now bent 45 degree rack, and rolls it into the  
building like nothing happened.  While several of were watching the  
whole incident with slack jaws!

My management talks to their management...and I'm still without a  
strip chart recorder to this day.

Tom Frank, KA2CDK



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Re: [time-nuts] Why/when did cell towers switch to 15 MHz?

[Alan Melia]

Some of the ex Telcom units I have seen have 10MHz Rb or OCXO (Datum or
Lucent) and a 10 to 15MHz converter in a milled cover externallysome
frequencies are more easily generated from 15MHz.

Alan G3NYK

- Original Message -
From: <[EMAIL PROTECTED]>
To: "Discussion of precise time and frequency measurement"

Sent: Sunday, November 16, 2008 10:57 PM
Subject: Re: [time-nuts] Why/when did cell towers switch to 15 MHz?


> Not exactly sure why they use 15 MHz, but a good buddy of mine who's a
> Verizon Wireless tech says 15 MHz it is.
>
> Mike
there.


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Re: [time-nuts] Oh the horror

[Hal Murray]

[EMAIL PROTECTED] said:
> It looks like the entire shipping case has been dropped or turned over
> from a reasonable height. The 7mm thick internal glass cylinder has
> been shattered and inside that the glass bulb has been smashed to
> bits.

> The whole unit is completely destroyed and useless. 

Sigh.  It hurts even from many thousand miles away...

> My girlfriend just doesn't understand...

There must be some way to explain it.  Does she have a garden?  How about a 
cloth collection?

How would she feel if a herd of elephants danced on her garden?  Or a bucket 
of tar got poured over her best box of cloth?

--

Many years ago, we were writing some software for Pacific Telephone.  I got 
to BS with one of their old timers.  He told a tale that is roughly...

Pacific Telephone used a lot of IBM 7040s.  IBM was getting out of that 
business.  The last one off the refurbishing line was air freighted out to 
California.  That was Friday afternoon.  Monday morning they were going to 
start tearing down the line.

After the plane arrived in California, the CPU got dropped between the 
airplane and the truck.  The frame was bent about 15 degrees.

Somebody made a quick phone call.  The refurbishing line stayed open long 
enough to process that machine again.It worked fine.


-- 
These are my opinions, not necessarily my employer's.  I hate spam.




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Re: [time-nuts] Why/when did cell towers switch to 15 MHz?

[n1jez]

Not exactly sure why they use 15 MHz, but a good buddy of mine who's a 
Verizon Wireless tech says 15 MHz it is.

Mike
- Original Message - 
From: "Hal Murray" <[EMAIL PROTECTED]>

>> and the usual 15 MHz Cell output.
>
> My Z3801A has a 10 MHz output.  I thought that was normal.  It seems like 
> a
> nice round convenient number.
>
> So why did cell phone towers switch to 15 MHz?  Or is it just Lucent that
> switched?
>
>
> -- 
> These are my opinions, not necessarily my employer's.  I hate spam.
>
>
>
>
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[time-nuts] Oh the horror

[Clive Green]

Having sold, delivered, installed, commissioned some 50 Active & Passive
Hydrogen Maser’s around the world, with the attendant paperwork, for these
“controlled” timepieces, end user obligations etc etc, I can fully feel for
the lab awaiting a successful delivery.

The insurance claim will be interesting. The repair will be long winded, but
nothing can be expected otherwise. Having your own backing vacuum pump,
turbo molecular vacuum pump, helium leak detector & the attendant
connections & vacuum valves will help a local rather than a back-to-base
fix.

Then, look forward to e-15 / 100s AVAR & not being able to live without
them. If you have problems, QSY & contact me.  

Look out for a breath of fresh air on the H Maser front.

Clive Green

CEO 

Quartzlock 

+ Gothic, Plymouth Road, Totnes, Devon. TQ9 5LH England

(: +44 (0) 1803 862 062 7: +44 (0) 1803 867 962

š:   [EMAIL PROTECTED] ü:
 www.quartzlock.com

Skype: clive.green.skype Messenger: [EMAIL PROTECTED]

Registered office: Gothic, Plymouth Road, Totnes, Devon. TQ9 5LH England
Registered in England

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Re: [time-nuts] Oh the horror

[Brooke Clarke]

Hi:

I've had my share of disaster shipments and most of them were the fault of the 
sender's packaging, not the carrier.  See:
http://www.prc68.com/I/Pack.shtml#WgW
Including an FTS4060 band strapped to a pallet! (it did not survive)

Have Fun,

Brooke Clarke
http://www.prc68.com

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Re: [time-nuts] Oh the horror

[Björn Gabrielsson]

On Mon, 2008-11-17 at 00:38 +1100, Jim Palfreyman wrote:
> Only this group will understand and suffer with this news...
> 
> Our observatory has recently had three Russian hydrogen masers arrive (along
> with some Russians to install them).
> 
> It turns out that one of the masers had a rough trip from Russia to
> Australia.
> 
> It looks like the entire shipping case has been dropped or turned over from
> a reasonable height. The 7mm thick internal glass cylinder has been
> shattered and inside that the glass bulb has been smashed to bits.
> 
> The whole unit is completely destroyed and useless.
> 
> It's enough to make a grown man cry.

On a much smaller scale... but the "incident" shown in the attached
picture was no fun either... two old BVAs came the standard (brutal)
post service packed like in the picture.

One of the two got its glass bottle broken. :-(

Thanks to lucky circumstances it later got repaired and a good new
home.  :-))

--

Björn
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[time-nuts] Why/when did cell towers switch to 15 MHz?

[Hal Murray]

> and the usual 15 MHz Cell output.

My Z3801A has a 10 MHz output.  I thought that was normal.  It seems like a 
nice round convenient number.

So why did cell phone towers switch to 15 MHz?  Or is it just Lucent that 
switched?


-- 
These are my opinions, not necessarily my employer's.  I hate spam.




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[time-nuts] Pinout for Lucent GPSDO

[n1jez]

Anyone have the pinout for the Lucent KS24019L104C GPSDO? There's a 50 pin 
(3 row) connector on the rear. Unit has what looks like an Oncore GT ? GPS, 
Datum 10 MHz OCXO and the usual 15 MHz Cell output.

TIA,

73,
Mike, N1JEZ
"A closed mouth gathers no feet" 


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Re: [time-nuts] Oh the horror

[Magnus Danielson]

Dear Jim,

Jim Palfreyman wrote:
> Only this group will understand and suffer with this news...
> 
> Our observatory has recently had three Russian hydrogen masers arrive (along
> with some Russians to install them).

Care to detail what model/specs it is? Elaborate some of how they are to 
be used. We love the details as you very well know. :)

> It turns out that one of the masers had a rough trip from Russia to
> Australia.
> 
> It looks like the entire shipping case has been dropped or turned over from
> a reasonable height. The 7mm thick internal glass cylinder has been
> shattered and inside that the glass bulb has been smashed to bits.
> 
> The whole unit is completely destroyed and useless.
> 
> It's enough to make a grown man cry.
> 
> My girlfriend just doesn't understand...

Do cry, do cry... we understand.

Hope insurance etc work out.

Cheers,
Magnus

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Re: [time-nuts] Oh the horror

[Mark Sims]

A little duct tape and a dash of superglue and she'll be humming along just 
fine...
_
Get 5 GB of storage with Windows Live Hotmail.
http://windowslive.com/Explore/Hotmail?ocid=TXT_TAGLM_WL_hotmail_acq_5gb_112008
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Re: [time-nuts] Oh the horror

[Adrian]

sounds like an interesting parts unit... ;)

Jim Palfreyman schrieb:
> Only this group will understand and suffer with this news...
>
> Our observatory has recently had three Russian hydrogen masers arrive (along
> with some Russians to install them).
>
> It turns out that one of the masers had a rough trip from Russia to
> Australia.
>
> It looks like the entire shipping case has been dropped or turned over from
> a reasonable height. The 7mm thick internal glass cylinder has been
> shattered and inside that the glass bulb has been smashed to bits.
>
> The whole unit is completely destroyed and useless.
>
> It's enough to make a grown man cry.
>
> My girlfriend just doesn't understand...
> ___
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>
>   


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Re: [time-nuts] Oh the horror

[ernieperes]

Hi Jim,

No wonder, my girlfriend would do the same...

Rgds Ernie.


-Original Message-
From: Jim Palfreyman <[EMAIL PROTECTED]>
To: Discussion of precise time and frequency measurement 

Sent: Sun, 16 Nov 2008 2:38 pm
Subject: [time-nuts] Oh the horror



Only this group will understand and suffer with this news...

Our observatory has recently had three Russian hydrogen masers arrive 
(along
with some Russians to install them).

It turns out that one of the masers had a rough trip from Russia to
Australia.

It looks like the entire shipping case has been dropped or turned over 
from
a reasonable height. The 7mm thick internal glass cylinder has been
shattered and inside that the glass bulb has been smashed to bits.

The whole unit is completely destroyed and useless.

It's enough to make a grown man cry.

My girlfriend just doesn't understand...
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[time-nuts] Oh the horror

[Jim Palfreyman]

Only this group will understand and suffer with this news...

Our observatory has recently had three Russian hydrogen masers arrive (along
with some Russians to install them).

It turns out that one of the masers had a rough trip from Russia to
Australia.

It looks like the entire shipping case has been dropped or turned over from
a reasonable height. The 7mm thick internal glass cylinder has been
shattered and inside that the glass bulb has been smashed to bits.

The whole unit is completely destroyed and useless.

It's enough to make a grown man cry.

My girlfriend just doesn't understand...
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