Understood. That makes a lot more sense. I'd bet you probably did better than you think but I understand the FUD (Fear, Uncertainty, and/or Doubt) that you may have messed it up. Perhaps you could borrow a MFJ259B from a local club or elmer to get the job done. I used the zero beat function and then later brought home my Agilent MSO6104 scope (as they have hardware frequency counters in them) and found that I was only off by a few Hz. Honestly the main thing is that when you call some one they answer you. In certain modes that can become a much more difficult task but I think if you were running into that issue you'd know...
~Brett (N7MG) On Thu, Jun 17, 2010 at 2:37 PM, David Ferrington, M0XDF <m0...@alphadene.co.uk> wrote: > 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 >> <m0...@alphadene.co.uk> 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" <m0...@alphadene.co.uk> >>> 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:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
