Keithley S530, Option Manual

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Section 3: Software Reference S530 Parametric Test Systems Frequency Analysis Option Manual
3-10 S530-923-01 Rev. A / January 2014
freq_measure_next
Purpose : This routine returns the frequency and amplitude of the next highest peak in the
frequency spectrum.
Format :
int freq_measure_next( double *freq_result, double *amp_result );
Parameters : None
Returns : This command returns a 1, if executed without error; otherwise, a negative
number is returned to indicate an error.
freq_result
measured frequency in Hz
amp_result
measured amplitude in dB
Remarks : The scope card must be initialized before using the freq_measure_next
command.
Example :
double freq;
double ampltd;
double freq_next;
double ampltd_next;
.
.
.
Status1 = freq_init( );
Status2 = freq_setup(20e6, 850e6, 1e6);
status3 = freq_measure(&freq, &ampltd);
status4 = freq_measure_next(&freq_next, &ampltd_next);