Thanks for all your help!
From the maxim app not, i can get the recorded sample point numbers Nrecord.
how to think of the Nrecord? Does it mean that i have sample Nrecord point datas from -vi to vi, here vi means the apmtitude of sinewave. So if the clock frequency is 27meg, then the sinewave period cycle is (1/27)*Nrecord*2? Is this correct?
If it correct, than the ADC input should be only half period cycle long?
Another idea is that i choose a sinwave frequency(much lower than 27meg,but not subfreq of clock). than oversamples. Also get Nrecord points.But how can control the sample point numbers?
Which method is ok?
Another question what's the mid_code meaning?And how can i get it ?
Can someone give me the detail?
I have to hurry up to do the test.
Thanks your help again!