Keithley S530, Option Manual

Page: 18 / 23

S530 Parametric Test Systems Frequency Analysis Option Manual Section 3: Software Reference
S530-923-01 Rev. A / January 2014 3-9
freq_measure
Purpose : This routine measures frequency and amplitude of the strongest signal.
Format :
int freq_measure( 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 command.
Example :
double freq;
double ampltd;
.
.
.
Status1 = freq_init( );
Status2 = freq_setup(20e6, 850e6, 1e6);
Status3 = freq_measure(&freq, &ampltd);