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Clock Not Right

Discussion in 'TiVo Premiere DVRs' started by jimlau, Mar 26, 2014.

  1. waynomo

    waynomo My One Time TCF Club

    12,053
    36
    Nov 9, 2002
    Seven...
    How can you tell what the time is on your TiVo to 15 seconds?
     
  2. steve614

    steve614 what ru lookin at?

    10,722
    0
    May 1, 2006
    Dallas, TX
    Any time the Tivo calls in to the Tivo Service to get guide updates, etc., the time is updated.
     
  3. mpnret

    mpnret Member

    137
    1
    Dec 4, 2012
    Just watch the time on your TiVo and see when it changes from one minute to the next. Then just compare to one of the many sources available to get accurate time. I use a Casio watch which gets the atomic time signal from Ft. Collins Co. I just checked and the watch and the TiVo are right to the second.
     
  4. waynomo

    waynomo My One Time TCF Club

    12,053
    36
    Nov 9, 2002
    Seven...
    Thanks for my doh moment! :D

    I have seconds displayed on my mobile phone with an app called Seconds Clock Widget. These days the time at least on my phone is very accurate. It didn't always used to be. Someone mentioned that these days time on our phones is set by GPS. I wonder if that is true.
     
  5. sharkster

    sharkster Well-Known Member

    3,900
    99
    Jul 3, 2004
    NV
    Yeah, I noticed that mine corrected yesterday. :)
     
  6. JohnS-MI

    JohnS-MI Member

    468
    3
    Jan 25, 2014
    SE MI
    Actually, TAI, International Atomic Time, is the "true" time and UTC is offset from it by the total cumulative leap seconds. UTC is discontinuous at leap seconds. GPS time is offset from it by the leap seconds already accumulated at the start of GPS time, but not since.

    However, the GPS navigational message includes the GPS to UTC time offset. I have never seen a GPS receiver that does not utilize it. Time zone and DST offsets may be left to the user or also applied automatically.

    UTC is designed to tick with the atomic clock but approximate mean solar time on earth (earth rotational time) through leap seconds.
     
  7. mpnret

    mpnret Member

    137
    1
    Dec 4, 2012
    Wow lots of info about time. All I know is my Casio watch syncs to the atomic clock in Colorado and matches my TiVo to the second and I never pad recordings. Unless it's for some other reason than time.
     
  8. rich

    rich Final answer?

    688
    0
    Mar 18, 2002
    New York
    Yeah, lots of my recordings fall about 10 seconds short, especially on certain channels like TLC and Spike. I have just started padding those shows by a minute at the end to compensate. It's frustrating.
     
  9. waynomo

    waynomo My One Time TCF Club

    12,053
    36
    Nov 9, 2002
    Seven...
    Speaking of NIST...

    NIST-F1 is old news. NIST-F2 is the new standard.

    How the U.S. Built the World's Most Ridiculously Accurate Atomic Clock

    http://www.wired.com/2014/04/nist-atomic-clock/

    Throw out that lame old atomic clock that's only accurate to a few tens of quadrillionths of a second. The U.S. has introduced a new atomic clock that is three times more accurate than previous devices.

    Atomic clocks are responsible for synchronizing time for much of our technology, including electric power grids, GPS, and the watch on your iPhone. On Apr. 3, the National Institute of Standards and Technology (NIST) in Boulder, Colorado officially launched their newest standard for measuring time using the NIST-F2 atomic clock, which has been under development for more than a decade.
     

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