I am going to prepare waveform generator using AD9834. I programmed the AD9834 with PIC microcontroller. My output is always 600mv, 400hz signal whatever value is wriiten to the AD9834. What can be the problem, reset problem or software problem. If one has done this thing please help me.
thanks Mr. srizbf for repling. I got some useful infomations from the site you have given. Still I could not rectify the problem. my attachment contain the program written in PIC CCS compiler.
My faulty is with PCB or IC since I was able to generate output with diffrent PCB.
Now I have these questions
1. At high frequenies(1MHz) waveform has lot of noises. See Attachment. What is the reason for this. How can this avoid.
2. At low frequency noise some what less still waveform is not sharp.
3. Out put voltage is 100mV ac. is it acceptable
4. At 2MHz waveform completely attenuate. I cannot go beyond 2Mhz. I use 5MHz crystal.
If one know the answer for these questions please help me.