[David]

Hello Andrew,
My specific application is that:finish one sweep(center 71Mhz,span 10Mhz),and get the power(dbm) in the frequency of 71Mhz.

In the last letter,I make an error in saConfigAcquisition(handle, SA_MIN_MAX, SA_LOG_SCALE);The 2rd argument is SA_AVERAGE instread of SA_MIN_MAX.So the ‘min’ array is the same with the ‘max’ array.

By saQuerySweepInfo(handle, &sweepLen, &startFreq, &binSize) I get the sweepLen and the binSize.With the formula
f = start + index * bin_size;
I get the index of 71Mhz.
So I think I can get the power of 71MHZ by min[index].

My signal is the same in every test.But I found the result is different very much in every test.But using Spike software,the result is not different very much in every test.
Why?Where is my mistake?

[Author]

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