> -----Original Message----- > From: Richard Cochran [mailto:[email protected]] > Sent: Monday, November 09, 2015 6:26 AM > To: Bassam Alsanie > Cc: [email protected] > Subject: Re: [Linuxptp-devel] EtherCAT and max frequency shift > > > Regards the maximum frequency shift the clock can support, I have a case > > that my custom ptp clock has maximum of 1000 ppm possible tune from > the > > center frequency. My question is, how the ptp algorithm deal with the > cases > > where it need to tune the clock beyond the maximum range? > > The maximum adjustment is a fundamental limitation of the clock, and > there is nothing you can do about it. However, 1000 ppm is enough to > tune most any clock, I would think. >
For perspective, many of the Intel parts have less than 700ppm adjustment range and work just fine. Regards, Jake ------------------------------------------------------------------------------ Presto, an open source distributed SQL query engine for big data, initially developed by Facebook, enables you to easily query your data on Hadoop in a more interactive manner. Teradata is also now providing full enterprise support for Presto. Download a free open source copy now. http://pubads.g.doubleclick.net/gampad/clk?id=250295911&iu=/4140 _______________________________________________ Linuxptp-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/linuxptp-devel
