Andy - Without the K3EXREF connected, the REF CAL frequency will be fixed and the K3 will drift, albeit very slightly, particularly when it is first switched on. With K3EXREF locked with your 10MHz standard the REF CAL frequency will vary to correct any drift in the K3. If you measure the output frequency of your K3 with an accurate frequency meter, such as a digital counter locked to a standard, you will find that your K3 is stable to within +/- a couple of Hertz.
73 de David G4DMP In a recent message, ANDY NEHAN <andy.ne...@btinternet.com> writes >Sometime ago I installed the K3EXREF which I feed from an external >10MHz double oven Xtal oscillator. I am confident the K3EXREF is >installed and configured correctly as when in use and the external >oscillator is connected the front panel says REF*CAL with the * >blinking. Attempting to change the local oscillator frequency gives the >message "Locked" just as the manual says. >However, I am puzzled as the local oscillator frequency display slowly >drifts down from 49.379.675Hz to 49.379.622Hz over a period of at least >an hour from K3 switch on. I leave the external oscillator on >permanently. I was expecting the local oscillator to rapidly get to its >final frequency. Can someone explain whats happening as I am puzzled?? >My firmware is the latest version. >Andy G4HUE -- + - - - - - - - - - - - - - - - - + | David M Pratt, Kippax, Leeds. | | Website: http://www.g4dmp.co.uk | + - - - - - - - - - - - - - - - - + ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
