Time-Nuts -- you still have a few hours to program your cesium clocks for the leap second! Older clocks such as the HP 5060 and 5061 or FTS 4050 and 4060 don't have a mechanism to add or delete a second, but most later model FTS, Datum, or Symmetricom cesium clocks have a switch or a GUI to handle leap seconds. See email below and attached photo for how to update a 5071A.
As an aside, back in the early 90's when I first got into this precision time hobby (see www.LeapSecond.com), "catching the leap second" was something I very much looked forward to. But now that I have a rather large collection of precision time pieces, it turns out that leap seconds are a bit of a pain. It's embarrassing to have a cesium clock sitting on a shelf, stable to nanoseconds, but the time display is off by a second. Anyway, over the next day please post reports of your own leap second events; whether you have a cesium clock, a PC clock, a GPSDO (HP,Agilent,Thunderbolt,Oncore,Fury,Jupiter,etc.). A number of you did well during the last one a few years ago. There are more subscribers on the list now so we might have quite a variety of reports. No regular clocks bother with leap seconds at all and a surprising number of laboratory or other precision time instruments don't do it right. So catch them in the act, if you can. Too bad http://www.humanclock.com/ ignores leap seconds. Thanks, /tvb <How to Watch a Leap Second> http://leapsecond.com/notes/leap-watch.htm <Time-Nuts -- Precise Time and Frequency for Amateurs> http://leapsecond.com/time-nuts.htm----- Original Message ----- From: "Tom Van Baak" <[email protected]>
To: "Marat Konkanov" <marconze...@...> Sent: Wednesday, December 31, 2008 12:21 AM Subject: Re: How to schedule a leap second on 5071A?
Hello Marat, Thanks for your email; it is my first one from Kazakhstan. You are correct; the last minute of Wednesday, December 31, 2008 will have 61 seconds instead of the usual 60. You can program your 5071A from the front panel menu using: Top -> CLOCK -> LEAPSEC -> MJD 54831 is 61 sec. See attached photo. If you can, please take a picture of your 5071A when the leap second occurs later today and send it to me, OK? Thanks, /tvb http://www.LeapSecond.com http://www.leapsecond.com/notes/leap-watch.htm----- Original Message ----- From: "Marat Konkanov" <marconze...@...>To: <[email protected]> Sent: Tuesday, December 30, 2008 11:31 PM Subject: How to schedule a leap second on 5071A?Hello, Mr. Baak. My name is Marat. I am from Kazakhstan. I have got Agilent 5071A. I know about the leap second in this year, but I do not know how to schedule it. There are 2 values: 59 and 61 in 5071A MENU's. That value should I choose? I think I must choose 61. Best regards, Marat Konkanov
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