Signal Generator
The signal generator found under Utilities can be used to generate a carrier which can be FM modulated with the following waveforms as defined by the Shape function.
- CW : unmodulated carrier
- Sine signal
- triangle signal
- sawtooth up signal
- sawtooth down signal
- square signal
- noise signal
We can select the periodic signal to modulate the carrier , in FM .(and we can adjust below the delta FM deviation)
Tone defines the frequency of modulation.
Update when unchecked requires the user to drop carrier, then re-start carrier in order for a change of modulation Shape or Tone frequency to take effect. When checked, values will update on the fly.
Stop after 1s limits carrier duration to 1 second
From nightly 1st of May 23 fw onwards, we have added 3 White Noise simulation options. We are generating simulated White Noise ,using pseudo random noise generator, 8 bits linear-feedback shift register (LFSR) algorithm, variant Fibonacci. (Following this wiki link)
- noise signal
Those GUI title, is indicating that the contents of the FFT spectrum , has harmonics of n x 20khz, or n x 10khz, or n x 5khz. (so user can select the granularity of the noise harmonics, ideally White noise should have all infinite harmonics) .
Example of the implementation of the first Noise option , n x 20 Khz aprox.
Update when unchecked requires the user to drop carrier, then re-start carrier in order for a change of modulation Shape or Tone frequency to take effect. When checked, values will update on the fly.
Stop after 1s limits carrier duration to 1 second