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Agilent N518xA, E8663B, E44x8C, and E82x7D Signal Generators Programming Guide 75
Programming Examples
GPIB Programming Interface Examples
rdVal[ibcntl] = '\0'; // Null character indicating end of array
// Prints signal generator power level
cout<<"Source power (dBm) is : "<<rdVal;
cout<<"Press any key to continue"<<endl;
cin.ignore(10000,'\n');
ibwrt(sig, ":FREQ:MODE?",11); // Querys source frequency mode
ibrd(sig, rdVal,100); // Enters in the source frequency mode
rdVal[ibcntl] = '\0'; // Null character indicating end of array
cout<<"Source frequency mode is "<<rdVal; // Print source frequency mode
cout<<"Press any key to continue"<<endl;
cin.ignore(10000,'\n');
ibwrt(sig, "OUTP OFF",12); // Turns off RF source
ibwrt(sig, "OUTP?",5); // Querys the on/off state of the instrument
ibrd(sig,rdVal,2); // Enter in the source state
rdVal[ibcntl] = '\0';
num = (int (rdVal[0]) -('0'));
if (num > 0){
cout<<"Source RF state is : On"<<endl;
}else{
cout<<"Source RF state is : Off"<<endl;}
cout<<endl;
ibwrt(sig, "*IDN?",5); // Querys the instrument ID
ibrd(sig, rdVal,100); // Reads the source ID
rdVal[ibcntl] = '\0'; // Null character indicating end of array
cout<<"Source ID is : "<<rdVal; // Prints the source ID
cout<<"Press any key to continue"<<endl;
cin.ignore(10000,'\n');
ibwrt(sig, "SYST:COMM:GPIB:ADDR?",20); //Querys source address
ibrd(sig, rdVal,100); // Reads the source address
rdVal[ibcntl] = '\0'; // Null character indicates end of array
// Prints the signal generator address
cout<<"Source GPIB address is : "<<rdVal;
cout<<endl;
cout<<"Press the 'Local' key to return the signal generator to LOCAL control”<<endl; cout<<endl;
return 0;
}
Queries for GPIB Using VISA and C
This example uses VISA library functions to query different instrument states and conditions. Launch
Microsoft Visual C++ 6.0, add the required files, and enter the following code into your .cpp source
file. visaex3.cpp performs the following functions:
• verifies the GPIB connections and interface are functional