[ntp:questions] Re: Comparing offset of multiple refclock/servers

John Ackermann N8UR jra at febo.com
Mon Aug 15 13:12:52 UTC 2005

Hal Murray wrote:
>>One option might be to go to a fourth machine that is looking at these
>>three, and use it as a sort of transfer standard -- looking at the
>>relative offset of other machines, and then subtracting them against
>>each other to obtain the differences.  But that seems sort of klunky.
> There is a noselect option on the server/peer line.  The data gets
> into the log files but doesn't get used for timekeeping.  So you
> can watch the other machines without needing to setup a 4th system.

Thanks, Hal, for the response to both my messages.  I think a lightbulb 
went off as a result -- for this application, where I want to measure 
the performance of the refclock in isolation, I *don't* want to include 
a bunch of servers, but rather give ntpd the very limited choice of just 
the serial data stream (to provide the coarse timecode) and the PPS 
signal.  That, plus using the "noselect" option may give me the answers 
I'm looking for.

Does that make sense?



More information about the questions mailing list