Hi,
This is a continuation from https://e2e.ti.com/support/clock-and-timing/f/48/t/907072
setting DEN = 10000 did improve the walking spurs but have degraded the spur performance as a result.
can you please assist with the following questions.
1. is the walking spur more susceptible if both LO's are using fractional values?
2. does the order of the modulator make a difference when using the DEN values?
3. should they use DEN = 10000 on all fractional values?
4. could using a larger DEN at rational numbers improve spur performance?
5. 1st and 3rd order modulators have given better spur performance while 2nd order has not been nice. is this typical?
Thanks,
Kevin