[time-nuts] Can Lady Heather Keep Computer Clock On Time?

[Brooke Clarke]

Hi Eric:

That seems to be for a time server.  He is just using an ordinary PC and 
NTP to set it's time.

Have Fun,

Brooke Clarke
http://www.PRC68.com


Eric Garner wrote:
> with the assumption that he seems to be fine right after a sync,
> (seemingly supported in the OP) reconfiguring the windows time service
> to update frequently seems  to me to be the easiest answer.
> under xp you can do so thus:
> http://support.microsoft.com/kb/314054
>
> _eric
>
>
> On Thu, Jul 29, 2010 at 11:13 AM, Bob Camp<lists at rtty.us>  wrote:
>    
>> Hi
>>
>> My observation is that the displayed clock on LH can be off by>  10 seconds.
>> That's with the current beta code and Windows 7 on a quad processor machine
>> or under XP on a dual core machine.
>>
>> Bob
>>
>> -----Original Message-----
>> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
>> Behalf Of Brooke Clarke
>> Sent: Thursday, July 29, 2010 2:04 PM
>> To: Discussion of precise time and frequency measurement
>> Subject: [time-nuts] Can Lady Heather Keep Computer Clock On Time?
>>
>> Hi:
>>
>> I have a friend who's setting up an observatory and the PC that controls
>> the telescope needs to have an accurate clock.
>> The telescope can point to within arc seconds of a star and that implies
>> that the computer clock needs to be within 50 ms.
>> If he does a Windows NTP sync first thing in the evening after a few
>> hours there's too big an error.  Running the observatory is like flying
>> a 747, i.e. there's a lot to do and the time needs to be handled
>> automatically, not by manual NTP updates.
>>
>> I know that TAC32 and a Motorola GPS will do this and you have a lot of
>> options of how it does it.  For example at a specified time interval or
>> when the computer clock differs from GPS by a specified amount of time
>> (50 ms in this case).
>>
>> What are the options in LH?  I ask because it's a lower cost option then
>> the Motorola GPS plus TAC32 option or building a NTP time server.
>>
>> --
>> Have Fun,
>>
>> Brooke Clarke
>> http://www.PRC68.com
>>
>>
>>
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>
>
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