Agilent Technologies N5181A/82A, N5183A MXG, E8663B manual 254

Creating and Downloading Waveform Files

Programming Examples

//The SCPI command has four parts.

//Part 1 = :MEM:DATA “filename”,

//Part 2 = length of Part 3 when written to a string

//Part 3 = length of the data in bytes. This is in s from above.

//Part 4 = the buffer of data

//Build parts 1, 2, and 3 for the I data.

sprintf(cmd, “:MEM:DATA \”ARBI:FILE1\”, #%d%d”, strlen(s), bytesToSend);

//Send parts 1, 2, and 3 iwrite(id, cmd, strlen(cmd), 0, 0);

//Send part 4. Be careful to use the correct command here. In many

//programming languages, there are two methods to send SCPI commands:

//Method 1 = stop at the first ‘0’ in the data

//Method 2 = send a fixed number of bytes, ignoring ‘0’ in the data.

//You must find and use the correct command for Method 2.

iwrite(id, ibuffer, bytesToSend, 0, 0);

//Send a terminating carriage return iwrite(id, “\n”, 1, 1, 0);

//Identical to the section above, except for the Q data.

sprintf(cmd, “:MEM:DATA \”ARBQ:FILE1\”, #%d%d”, strlen(s),bytesToSend); iwrite(id, cmd, strlen(cmd), 0, 0);

iwrite(id, qbuffer, bytesToSend, 0, 0); iwrite(id, “\n”, 1, 1, 0);

printf(“Loaded FILE1 using the E443xB format\n”);

//The E4438C, E8267C and E8267D have a newer faster format which

//allows 16 bits to be used. However this format is not accepted in

//the E443xB. Therefore do not use this next section for the E443xB.

printf(“Note: Loading FILE2 on a E443xB will cause \”ERROR: 208, I/O error\”\n”);

//Identical to the I and Q sections above except

//a) The I and Q data are interleaved

//b) The buffer of I+Q is twice as long as the I buffer was.

//c) The SCPI command uses WFM1 instead of ARBI and ARBQ. bytesToSend = numsamples*4;

sprintf(s, “%d”, bytesToSend);

sprintf(cmd, “:mem:data \”WFM1:FILE2\”, #%d%d”, strlen(s),bytesToSend); iwrite(id, cmd, strlen(cmd), 0, 0);

254 Agilent N518xA, E8663B, E44x8C, and E82x7D Signal Generators Programming Guide