IC-7410 Rig Control Program and Soft66LC4 (5)

Let’s see now if the following simple adjustment is effective with the frequencies other than LO+600Hz.

if(channels == 2) {
  for(int i =0; i < NFFT; i+=2) {
      audio_signal[i]   = samples[i] + 400.0;
      audio_signal[i+1] = -0.32*samples[i] + 1.14*samples[i+1];
  }
}

The RF frequency is varied with 1kHz step, and the center is at 7020kHz. You can observe the images as faint green dots on the waterfall, but on the whole it looks reasonably fine, doesn’t it?

You can see the waterfall without the adjustment in my previous article.