Frequency scan with radio maintained in active state

A method, comprising:

• maintaining a radio in an active mode during a frequency scan at the radio of a plurality of target frequencies, the frequency scan comprising:
• determining a plurality of coarse frequency tuning values based on the plurality of target frequencies;
• placing a PLL of the radio in an open-loop configuration;
• while the PLL is in the open-loop configuration:
• programming a VCO of the PLL with the coarse frequency tuning values;
• and
• computing a fractional divider value based on the target frequency and programming a divider of the PLL with the computed fractional divider value.

A device comprising:

• a radio comprising a phase locked loop (PLL) including a voltage-controlled oscillator (VCO) and a divider;
• wherein the radio is configured to, while maintaining the radio in the active mode, for each of a plurality of target frequencies:
• determine a coarse frequency tuning value based on the target frequency;
• place the PLL in an open-loop configuration;
• while the PLL is in the open-loop configuration:
• program the VCO with the coarse frequency tuning value;
• and
• compute a fractional divider value based on the target frequency and program the divider with the computed fractional divider value;
• place the PLL in a closed-loop configuration;
• and
• in response to the PLL reaching a settled state, perform an operation at the based on an output signal of the PLL.