Agilent Technologies N8201A Service Manual download pdf (Page 60)

60 Agilent N8211A/N8212A Performance Upconverter Synthetic Instrument Module, 250 kHz to 20 / 40 GHz

3 Programming Examples

printf(buffer); // Print the ID string

printf("\n"); // Print carriage return

// Flush the read buffer

// Set sig gen power to -5dbm

status = viWrite(instr, (ViBuf)"POW:AMPL -5dbm\n", 15, &retCount);

// Query the power level

status = viWrite(instr, (ViBuf)"POW?\n",5,&retCount);

// Read the power level

status = viRead(instr, (ViBuf)buffer, MAX_COUNT, &retCount);

buffer[retCount]= '\0'; // Indicate the end of the string

printf("Power level = "); // Print header to the screen

printf(buffer); // Print the queried power level

printf("\n");

status = viClose(instr); // Close down the system

status = viClose(defaultRM);

return 0;

}

Sockets LAN Programming and C

The program listing shown in “Queries for Lan Using Sockets" on page 63 consists of two

files; lanio.c and getopt.c. The lanio.c file has two main functions; int main() and an

int main1().

The int main() function allows communication with the N8211A/N8212A interactively

from the command line. The program reads the N8211A/N8212A's hostname from the

command line, followed by the SCPI command. It then opens a socket to the

N8211A/N8212A, using port 5025, and sends the command. If the command appears to be

a query, the program queries the N8211A/N8212A for a response, and prints the response.

The int main1(), after renaming to int main(), will output a sequence of commands

to the N8211A/N8212A. You can use the format as a template and then add your own code.

This program is available on the N8211A/N8212A Documentation CD-ROM as lanio.c.

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Agilent Technologies N8201A Service Manual Page 60