Questions, answers, knowledge PSK/QPSK decoder using GODIL

What's the meaning of the symbols on the 3-digit display

How does the GODIL lock to the incoming bitstream?


How does the VCO lock (bit synchronisation)?


How is frame synchronisation done?


How are the 2 synchronisation states shown?

See display info

How to adjust the vco?

Use the C-trimmer (4-30 pF):