| Read-only | About SA Application | 
| Description | Returns the frequency of the first RF bin. Note: This value can differ slightly from the SA Sweep start frequency, the frequency of the first RF bin is aligned with the current DFT grid. | 
| VB Syntax | value = sa.dft.DataFirstRFBin | 
| Variable | (Type) - Description | 
| sa.dft | A SpectrumAnalyzerDFT (object) | 
| value | (Double) Variable to store the returned value. | 
| Return Type | Double | 
| Example | value = sa.dft.DataFirstRFBin 'Read | 
| C++ Syntax | HRESULT get_DataFirstRFBin(double* val); | 
| Interface | ISpectrumAnalyzerDFT |