The frequency resolution Δf of the synthesizer is a function of the clock frequency and the number of bits Bθ(n) employed in the phase accumulator. The frequency resolution can be determined using:
For example, for the following DDS parameters:
- fclk = 120 MHz
- BΘ(n) = 32
the frequency resolution is:
In the time-division multichannel case, the frequency resolution is improved by the number of channels, as follows:
