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Roman Piksaykin 2023-12-02 17:43:15 +03:00 zatwierdzone przez GitHub
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@ -12,7 +12,7 @@ Currently the upper freq. limit is about 9.4 MHz and it is achieved only using P
![mfsk-spectra](https://github.com/RPiks/pico-hf-oscillator/assets/47501785/a8309813-8e77-407e-abfc-58cbd262c35c)
Here is an example of narrowband FSK (5 Hz step, 20 Hz range in total).
Here is an example of narrowband FSK (9.4 MHz carrier, 5 Hz step, 20 Hz range in total).
# Phased locked loop in C
The DCO uses phase locked loop principle programmed in C.
@ -23,7 +23,7 @@ transmit the signal, you should calculate and provide a lowpass filter of
appropriate frequency. Please also figure out whether you possess rights
to emit radio frequency energy on desired frequency.
# GPS reference frequency correction (optional) since V0.9
# GPS reference frequency correction (optional) since v.0.9
GPS reference frequency correction option provides an absolute frequency error within about ~1Hz in long term.
![pico-hf-oscillator](https://github.com/RPiks/pico-hf-oscillator/assets/47501785/06700e39-6b5f-4a6a-828a-d1cfdd9418ce)