[Elecraft] accurate time

[David Ferrington, M0XDF]

Yes, NTP actually takes into account network latency between your  
machine and the NTP server, so when the server gives it 12:01:01.001,  
if the total latency is 100mS, it knows to add 50mS and so sets the  
time to 12:01:01.051 and it does this a number of times, to get the  
average time allowing for latency.

That's a bit of a simplification, but you get the idea.
73 de M0XDF, K3 #174

-- 
A person usually has two reasons for doing something: a good reason  
and the
real reason. -Thomas Carlyle, historian and essayist (1795-1881)

On 12 Mar 2009, at 19:49, Mike Markowski wrote:

> For situations where time is important, it's worth learning about  
> NTP.  It's an
> open protocol and is run by default on most unix-like OSes.  Unlike  
> the Windows
> NTP client which simply syncs every couple weeks (by default), an  
> ntp daemon is
> running always on your machine.  It doesn't do a simple sync but  
> continually, to
> use the word loosely, monitors nearby time servers.  The linux  
> laptop in my
> shack is always right on time, plus or minus such a tiny amount that  
> it doesn't
> matter.
>
> The protocol is used worldwide and was initially developed by Prof  
> Dave Mills at
> Univ of Delaware, my alma mater.  As an EE grad student, I used to  
> enjoy
> attending his presentations on NTP.
>
> "Does anybody really know what time it is?"  - Chicago    :-)
>
> 73,
> Mike ab3ap
>
> PS NTP can even sync against WWV for time keepers on isolated nets.
>
> Don Wilhelm wrote:
>> Ken and all,
>>
>> I have been using Atomic Clock Sync for a couple years now to keep  
>> the
>> computer clock accurate.  It runs on Windows, but I recall it is
>> multi-platform.  Free from http://www.worldtimeserver.com.  It works
>> with a variety of standard time sites.
>>
>> Try it, you may like it too.
>>
>> 73,
>> Don W3FPR
>>
>> Ken Kopp wrote:
>>> I've been synching my computers clocks with the NIST
>>> site for years.  I think they have a little program on their
>>> website that one can download ... at least I think that's
>>> where I got mine
>>>
>>> 73! Ken Kopp - K0PP
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