Agilent Technologies InfiniiVision 2000 X-Series, Руководство программиста, Страница: 837 / 930

Programming Examples
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Agilent InfiniiVision 2000 X-Series Oscilloscopes Programmer's Guide 837
void analyze (void)
{
double wav_format;
double acq_type;
double wav_points;
double avg_count;
double x_increment;
double x_origin;
double x_reference;
double y_increment;
double y_origin;
double y_reference;
FILE *fp;
int num_bytes; /* Number of bytes returned from instrument. */
int i;
/* Make a couple of measurements.
* ------------------------------------------------------------- */
do_command(":MEASure:SOURce CHANnel1");
do_query_string(":MEASure:SOURce?");
printf("Measure source: %s\n", str_result);
do_command(":MEASure:FREQuency");
do_query_number(":MEASure:FREQuency?");
printf("Frequency: %.4f kHz\n", num_result / 1000);
do_command(":MEASure:VAMPlitude");
do_query_number(":MEASure:VAMPlitude?");
printf("Vertical amplitude: %.2f V\n", num_result);
/* Download the screen image.
* ------------------------------------------------------------- */
do_command(":HARDcopy:INKSaver OFF");
/* Read screen image. */
num_bytes = do_query_ieeeblock(":DISPlay:DATA? PNG, COLor");
printf("Screen image bytes: %d\n", num_bytes);
/* Write screen image bytes to file. */
fp = fopen ("c:\\scope\\data\\screen.png", "wb");
num_bytes = fwrite(ieeeblock_data, sizeof(unsigned char), num_bytes,
fp);
fclose (fp);
printf("Wrote screen image (%d bytes) to ", num_bytes);
printf("c:\\scope\\data\\screen.bmp.\n");
/* Download waveform data.
* ------------------------------------------------------------- */
/* Set the waveform points mode. */
do_command(":WAVeform:POINts:MODE RAW");
do_query_string(":WAVeform:POINts:MODE?");
printf("Waveform points mode: %s\n", str_result);
/* Get the number of waveform points available. */
do_query_string(":WAVeform:POINts?");