We need to design a fast random frequency hopping system with phase coherent (phase coherent (some time called phase memory) mean that when hop on f1, f2, ... fn and return to f1 series frequencies, the f1 phase will be such as we always on f1).
The hop frequencies are in 100MHz to 400MHz range, the system clock is 3.5GHz and the switching should be done within 200ns.
We want using AD9914 DDS IC but we need a way to reset its accumulator in accurate time during one 3.5GHz clock.
How it can be performed ?
Other (phase coherent frequency hopping) idea are welcome