Brett, I think after all this time, I may have misunderstood the Reference Oscillator calibration instructions. I had always read the following:
Reference Oscillator The K3’s reference oscillator is a TCXO, or temperature-compensated crystal oscillator. It is normally calibrated at assembly time or by the factory. There are two types: 5 ppm and 1 ppm. Either TCXO can be calibrated using an accurate frequency counter (Method 1), or by zero-beating the sidetone against a reference signal (Method 2). Accuracy of the 1 ppm TCXO can be improved by entering the supplied calibration data (Method 3). Be sure to keep the data sheet that was supplied with the oscillator. As meaning there were 3 methods of calibrating the frequency, but now I think there are only 2 ways to calibrate it, plus the possibility of improving the stability (method 3). I'm happy that it's very stable, but not sure I did a good job on the frequency. I don't have a frequency counter and did the best I could to zero-beat it. so thanks for your comments, they have helped me understand this better. 73 de M0XDF -- It is not how old you are, but how you are old. -Jules Renard, writer (1864-1910) On 17 Jun 2010, at 22:13, Brett Howard wrote: > You said you wanted to be able to calibrate it via the data that came > with the device. You can calibrate it by inputting the data to the > radio and you will get the 0.5PPM accuracy you were promised. Does > that mean that the data is used? No. But you CAN input it and you > WILL get the accuracy you paid for. > > ~Brett (N7MG) > > On Thu, Jun 17, 2010 at 2:10 PM, David Ferrington, M0XDF > <[email protected]> wrote: >> Is it then used - I thought I saw a post saying you can input it, but it's >> not used. >> And I wonder if that works in the OSX version ? >> 73 de M0XDF >> -- >> As a well spent day brings happy sleep, so life well used brings happy >> death. -Leonardo da Vinci, painter, engineer, musician, and scientist >> (1452-1519) >> On 17 Jun 2010, at 21:46, Brett Howard wrote: >> >> You can input the information via the K3 utility. It is then stored in the >> radio... >> >> ~Brett >> >> On Jun 17, 2010 1:16 PM, "David Ferrington, M0XDF" <[email protected]> >> wrote: >>> I would like to be able to calibrate it according the manual and Method 3 >>> 73 de M0XDF >>> -- >>> Sometimes I wonder whether the world is being run by smart people who are >>> putting us on or by imbeciles who really mean it. >>> -Mark Twain, author and humorist (1835-1910) >>> >>> On 17 Jun 2010, at 19:37, Brett Howard wrote: >>> >>>> So you bought the TCXO because you wanted to be able to say that it >>>> was further temperature compensated by firmware? Because what was >>>> promised was that it would get to 0.5PPM via additional firmware >>>> correction. Well it turns out that the oscillators already do that >>>> out of the box. Thus implementing even further enhancement got moved >>>> very low on the list because people were already receiving that which >>>> they were promised. >>>> >>>> At the moment there are MANY things that the P3 will be able to do >>>> that are yet to be promised. You can easily tell by looking at the >>>> back of one at a hamfest. There is a VGA connector port, a USB >>>> Keyboard port, and a port to accept a W2 sensor... Think of all the >>>> possibilities that can come from this. >>>> >>>> Not to mention.. Think of all the features that have come to the K3 >>>> that weren't promised! I'd hope that you purchased the TCXO so that >>>> you could have 0.5PPM rather than 5PPM accuracy on your reference You >>>> can be comforted if that is the case as you are actually getting >>>> exactly what you paid for. >>>> >>>> ~Brett (N7MG) >>> >> >> ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
