On 2010-05-11, David Woolley <[email protected]> wrote: > Russell, David wrote: >> I am trying to verify the correct implementation of NTP on a device >> that is configured to poll a GPS based dedicated time server on the >> local area network. The round trip times to this stratum 1 vary between >> 3.3 and 3.4ms. >> >> I have plotted the offset vs drift in the included jpg. The drift >> rate varies between -3 and -3.2 us/s and the offset is +/- 200us. >> Note that the first part of the graph is when NTP started. > > It is not permissible to post JPGs to non-binaries Usenet groups (I > guess you used the email gateway - the binary was stripped.) Also, > given the likely content of the image (i.e. line art) JPG is a very poor > choice of image format. > > You haven't told us how well controlled the temperature of the crystal > is. 200 ppb sounds good unless the crystal is ovened or the machine is > in an air conditioned room and has constant power demand.
That was plus or minus 3PPM he was claiming _______________________________________________ questions mailing list [email protected] http://lists.ntp.org/listinfo/questions
