Strange unliked noise (6.8 MHz Sine) on 6211DSK output ?

[johnattan]

Hi dear all,

Hope if any can help me in my issue,

I have "320C6211 DSK" and CCS 3,
When i try to run any simple application like generating a square or sine waveform, i always have my desired signal BUT WITH AN ANOTHER UNDESIRED AND UNLIKED ADDED 6.8 MHz SINE SIGNAL with a constant frequency and amplitude all time (6.8 MHz, 1.8 V). The both desired and unliked signal are superposed and it's looks like a modulation !!!

Does any one know how to remove this strange noise please ?

Thanks.

 

[Sarada Prasad Dakua]

Re: Strange unliked noise (6.8 MHz Sine) on 6211DSK output

hi,
better simulate it to ensure of the specification.

 

[mondunno]

specify clearly dude, whats the freq of the sine/square wave u're generating? from audio port?
which is the Probe u're using?

just do this experiment, hold the Reset button while watching the output, if u've still got the same sine noise, its inherent and u need to contact the TI representatives