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wip4speed
Roman Piksaykin 2023-11-26 03:32:56 +03:00 zatwierdzone przez GitHub
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@ -6,11 +6,9 @@ precise PLL digital frequency oscillator of the portion of HF radio spectrum
1.1 to 9.4MHz with high resolution.
# Precise frequency resolution
The library provides 1 Hz frequency resolution in initialize function. This
resolution can be easily increased to 23 millihertz, which is limited by
24-bit register which is used in algorithm.
Currently the upper freq. limit is about 9.4 MHz and it is achieved only using
pi pico overclocking to 270MHz.
The library provides about 23 milli-Hz frequency resolution. This resolution is limited by 24-bit register which is used in algorithm.
The working WSPR beacon which has been built on the base of this project proves that the quality of generated signal is sufficient to such precise (~1.46 Hz step) frequency manipulation digital modes.
Currently the upper freq. limit is about 9.4 MHz and it is achieved only using Pico overclocking to 270MHz.
![mfsk-spectra](https://github.com/RPiks/pico-hf-oscillator/assets/47501785/a8309813-8e77-407e-abfc-58cbd262c35c)