开云体育

Hi All
Really sorry to ask this, but I'd appreciate your help setting up my uBitx. I've read countless ways of calibration, from KD8CEC and others on here, but cannot fathom how to get it right. What exactly is 'zero beat', do I select LSB or USB when setting it up? When I htink I've got it set I find out the sidebands are swapped (compared with a websdr site)

I've borrowed a 10.7MHz crystal marker that transmits a 1khz sine wave. I can pick this up with the box off. An app on my phone can generate a 1khz sound too. I've also got a picoscope 2105 with 25Mhz bandwidth if that helps. I'd appreciate some pointers what to do, what to look out for.
Many thanks
Graham

I've solved it!
I set the calibration sound first, tuning for a near 1khz sound compared with that from my phone, then tuning the BFO to get the best match between the 1khz signal generated on my phone with the sound received. I also found that I could set the BFO frequency twice, in effect! The first time it was too high, near 12MHz, then as I tuned the BFO down the audio signal fell in frequency. I continued to tune down and the audio returned and I was able to set and match the tones. I checked my LSB/USB settings with 14074Mhz and found they were the right way around too.
I also found the radio needed rebooting after setting the calibration and BFO.
Graham