I would like to ask a question about the following issues.
; AD9837 evk(Mclk 16Mhz) + control board + AD9837 SDZ(PC Tool)
; PC Tool setting -> Freqreg = 3Mhz, Phase = 0,. Sleep option = Full Power UP, Iout Output = Sinusoidal, Sign Bit OutPut = Phase Accumulatro
; I want a 3Mhz output, and a fine change in 100hz increments.
However, if the frequency is set to 3Mhz, frequency and duty shake occurs.( Freq = 2.6Mhz ~ 3.2Mz shake. dyty = 30% ~ 45% shake)
Frequency dupe shake is present at most other frequency settings... ex> 2.1Mhz, 4,1Mhz, 9Mhz, 10Mhz,,,,,,
(1) Is the AD9837 able to accurately output only the frequency that is correctly divided?
Ex> 4Mhz, 2Mhz, 3.2Mhz ... ...
(2) If (1) is correct, is there a solution for other frequencies?
thank you all the time....