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Programming Example

Checking the USB Connection

Usually, using “*IDN?” verifies the data transferring

between the controller PC and the instrument.

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#include "visa.h"

#include <stdio.h>

#define BufferSize 128

static ViStatus status;

static ViSession defaultRM;

static ViSession inst_N9322C;

static ViUInt32 rcount;

static unsigned char buffer[BufferSize];

int main(void)

{

/* Connect N9322C and read its "IDN". */

status = viOpenDefaultRM (&defaultRM);

status = viOpen (defaultRM,

"USB0::2391::8472::0000000000::0::INSTR", VI_NULL,

VI_NULL, &inst_N9322C);

if (status != VI_SUCCESS)

return -1; //failed to connect N9322C/

/* Read "IDN" from N9322C" */

status = viWrite (inst_N9322C, "*RST\n",

StringLength("*RST\n"), &rcount);

status = viWrite (inst_N9322C, "*IDN?\n",

StringLength("*IDN?\n"), &rcount);

status = viRead (inst_N9322C, buffer, BufferSize,

&rcount);

/* Close connection to N9322C. */

status = viClose (inst_N9322C);

status = viClose (defaultRM); return 1;

}

Keysight N9322C User Manual

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