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© National Instruments Corporation 23 NI PXI-5600 Calibration Procedure
niTuner_CalAdjustInternalReferenceFrequency
Function Prototype
long niTuner_CalAdjustInternalReferenceFrequency
(
unsigned int calHandle,
double frequency,
double accuracy,
unsigned long* done
)
Purpose
This function adjusts the internal reference frequency until the given frequency is within
accuracy Hz of 110 MHz. Use this function in conjunction with the spectrum analyzer
functions to calibrate the internal reference frequency. Refer to the Adjusting the Internal
Reference Frequency section.
Parameters
Name Description
calHandle The calibration session reference
frequency The frequency returned by the spectrum analyzer, representing the
11th harmonic of the internal reference frequency
accuracy The deviation in Hz from 110 MHz that indicates when to stop
adjusting the internal reference frequency
done The status of the internal reference frequency adjustment procedure:
0 = not done
1 = done