The frequency resolution ∆f of the synthesizer is a function of the clock frequency and the modulus. The frequency resolution can be determined using:
For example, for the following DDS parameters:
- fclk = 120 MHz
- M = 1000
The frequency resolution is:
- = 120 x 106 / 1000
- = 120 kHz
In the time-division multichannel case, the frequency resolution is improved by the number of channels, as follows:
