Professional Web Applications Themes

HZ=1000 ? - FreeBSD

Removed by Administrator...

  1. Moderated Post

    Default HZ=1000 ?

    Removed by Administrator
    Dick Guest
    Moderated Post

  2. Moderated Post

    Default Re: HZ=1000 ?

    Removed by Administrator
    cpghost@cordula.ws Guest
    Moderated Post

  3. #3

    Default Re: HZ=1000 ?



    ws wrote:
     
    In the dim and distant past (like 1983) some systems used HZ=50 or HZ=60
    depending on where in the world they were. I used an MP/M based box
    that took it's clock tick from the power line (no good RTC hardware
    available but the power company keeps pretty good time).

    John
    John Guest

  4. Moderated Post

    Default Re: HZ=1000 ?

    Removed by Administrator
    dick Guest
    Moderated Post

  5. #5

    Default Re: HZ=1000 ?

    Am Dienstag, 5. April 2005 01:09 schrieb John Pettitt: 
    >
    > In the dim and distant past (like 1983) some systems used HZ=50 or HZ=60
    > depending on where in the world they were. I used an MP/M based box
    > that took it's clock tick from the power line (no good RTC hardware[/ref]

    Hmm, I've seen onboard RTCs which surely were less acurate than a
    power-line-driven oscillator was ;) Some RTCs are really bad. But at least
    here in germany power line frequency is astonishing acurate. We also have a
    broadcast station which generates it's 50Hz vertical refresh rate from a
    dedicated caesium clock. Of course this tv station is paid by the peoples....

    Sorry, a bit OT, but I'm really impressed how constant power line frequency
    is.

    -Harry
     

    -----BEGIN PGP SIGNATURE-----
    Version: GnuPG v1.4.0 (FreeBSD)

    iD8DBQBCUlWtBylq0S4AzzwRAinhAKCNCE+ruXGU6hYWrDvYBg 71ngVPRwCdFCn0
    7Xm5jfUxZiUhwRPKMY61qzw=
    =Yi52
    -----END PGP SIGNATURE-----

    Emanuel Guest

  6. Moderated Post

    Default Re: HZ=1000 ?

    Removed by Administrator
    cpghost@cordula.ws Guest
    Moderated Post

  7. #7

    Default Re: HZ=1000 ?

    Emanuel Strobl writes:
     

    It isn't just in Germany. A number of power utilities work hard to keep
    line frequency extremely constant, specifically for the purpose of
    allowing the frequency to be used to discipline clocks.

    Still, I think you can do far better with NTP.

    --
    Anthony


    Anthony Guest

Similar Threads

  1. Replies: 14
    Last Post: November 24th, 11:26 PM
  2. D60 ISO 1000
    By Annika1980 in forum Photography
    Replies: 5
    Last Post: August 10th, 03:51 PM
  3. $1000 to spend
    By Bob or Shelly Young in forum Photography
    Replies: 9
    Last Post: July 2nd, 04:09 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139