A method of generating a first oscillator signal having a desired frequency in a first continuous frequency range, the method comprising • generating in a voltage controlled oscillator unit (72; 82; 92) with at least one voltage controlled oscillator a second oscillator signal having a frequency in a second continuous frequency range of at least one octave; • selecting said second continuous frequency range to have a lower endpoint in said first frequency range and an upper endpoint above said first frequency range; • selectively using said second oscillator signal unchanged or dividing said second oscillator signal by a division ratio selected from a group of division ratios comprising integer powers of the number 2 to obtain said first oscillator signal; • comparing the actual frequency of said first oscillator signal with said desired frequency; and • selecting said division ratio in dependence of the result of the comparison, characterized in that the step of selecting said division ratio comprises: • tuning the voltage controlled oscillator unit (72; 82; 92) to a frequency at an endpoint of said second continuous frequency range; • selecting an initial division ratio from said group of division ratios so that the frequency of said first oscillator signal is within said first frequency range; and • adjusting, if possible, the frequency of the voltage controlled oscillator unit (72; 82; 92) so that the frequency of said first oscillator signal equals said desired frequency, and otherwise changing the division ratio and adjusting the frequency of the voltage controlled oscillator unit (72; 82; 92) so that the frequency of said first oscillator signal equals said desired frequency. • generating in a voltage controlled oscillator unit (72; 82; 92) with at least one voltage controlled oscillator a second oscillator signal having a frequency in a second continuous frequency range of at least one octave; • selecting said second continuous frequency range to have a lower endpoint in said first frequency range and an upper endpoint above said first frequency range; • selectively using said second oscillator signal unchanged or dividing said second oscillator signal by a division ratio selected from a group of division ratios comprising integer powers of the number 2 to obtain said first oscillator signal; • comparing the actual frequency of said first oscillator signal with said desired frequency; and • selecting said division ratio in dependence of the result of the comparison, characterized in that the step of selecting said division ratio comprises: • tuning the voltage controlled oscillator unit (72; 82; 92) to a frequency at an endpoint of said second continuous frequency range; • selecting an initial division ratio from said group of division ratios so that the frequency of said first oscillator signal is within said first frequency range; and • adjusting, if possible, the frequency of the voltage controlled oscillator unit (72; 82; 92) so that the frequency of said first oscillator signal equals said desired frequency, and otherwise changing the division ratio and adjusting the frequency of the voltage controlled oscillator unit (72; 82; 92) so that the frequency of said first oscillator signal equals said desired frequency. • tuning the voltage controlled oscillator unit (72; 82; 92) to a frequency at an endpoint of said second continuous frequency range; • selecting an initial division ratio from said group of division ratios so that the frequency of said first oscillator signal is within said first frequency range; and • adjusting, if possible, the frequency of the voltage controlled oscillator unit (72; 82; 92) so that the frequency of said first oscillator signal equals said desired frequency, and otherwise changing the division ratio and adjusting the frequency of the voltage controlled oscillator unit (72; 82; 92) so that the frequency of said first oscillator signal equals said desired frequency.