On Mon, 15 Jan 2007, Rob Seaman wrote: > > I'm wondering whether the clock discipline might better emphasize > only frequency in such circumstances, as opposed to merely tempering > the PLL.
I think that if you only correct the frequency of a clock then each time the frequency makes a deviation (e.g. because of temperature changes) you will accumulate a phase error, and if there's a bias in frequency deviations then the phase error will increase over time and become a long-term frequency error. Tony. -- f.a.n.finch <[EMAIL PROTECTED]> http://dotat.at/ ROCKALL MALIN HEBRIDES: WEST OR SOUTHWEST 7 TO SEVERE GALE 9, OCCASIONALLY STORM 10, VEERING NORTHWEST 5 OR 6 LATER. HIGH, OCCASIONALLY VERY HIGH. RAIN THEN SHOWERS. MODERATE OR GOOD, OCCASIONALLY POOR.