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234 Agilent N516xA, N518xA, E8663B, E44x8C, and E82x7D Signal Generators Programming Guide
Creating and Downloading Waveform Files
Downloading Waveform Data
For advanced programming languages, this section closely examines the code algorithm for
downloading I/Q waveform data by breaking the programming examples into functional parts and
explaining the code in generic terms. This is done to help you understand the code algorithm in
downloading the interleaved I/Q data, so you can leverage the concept into your programming
environment. While not discussed in this section, you may also save the data to a binary file and use
one of the download utilities to download the waveform data (see “Using the Download Utilities” on
page 242).
If you do not need the level of detail this section provides, you can find complete programming
examples in “Programming Examples” on page 246. Prior to downloading the I/Q data, ensure that it
conforms to the data requirements shown on page 199. To learn about I/Q data for the signal
generator, see “Understanding Waveform Data” on page 199. For creating waveform data, see
“Creating Waveform Data” on page 227.
NOTE To avoid overwriting the current waveform in volatile memory, before downloading files into
volatile memory (WFM1), change the file name or turn off the ARB. For more information, on
manually turning off the ARB, refer to the User’s Guide.
To turn off the ARB remotely, send: :SOURce:RADio:ARB:STATe OFF.
Using Simulation Software
This procedure uses a complex data array created in MATLAB and uses the Agilent Waveform
Download Assistant to download the data. To obtain the Agilent Waveform Download Assistant, see
“Using the Download Utilities” on page 242.
There are two steps in the process of downloading an I/Q waveform:
1. Open a connection session.
2. Download the I/Q data.
1. Open a connection session with the signal generator.
The following code establishes a LAN connection with the signal generator, sends the IEEE SCPI
command *idn?, and if the connection fails, displays an error message.
Line Code—Open a Connection Session
1
2
3
4
5
io = agt_newconnection('tcpip','IP address');
%io = agt_newconnection('gpib',<primary address>,<secondary address>);
[status,status_description,query_result] = agt_query(io,'*idn?');
if status == -1
display ‘fail to connect to the signal generator’;
end;
- Agilent Technologies 1
- E8257D PSG Signal Generators 1
- Programming Guide 1
- Change Record 2
- Contents 10
- Documentation Overview 11
- interfaces: 14
- Interfaces 16
- Agilent IO Libraries Suite 18
- Programming Languages 22
- Using the Web Browser 23
- Agilent MXG Web Server On 24
- ESG/PSG/E8663B Web Server On 24
- Preferences 29
- Getting Help (Agilent MXG) 30
- Getting Help (ESG/PSG/E8663B) 30
- Troubleshooting 31
- Error Messages 32
- Error Message Types 33
- 2 Using IO Interfaces 35
- Using IO Interfaces 36
- Using GPIB 36
- Set Up the GPIB Interface 37
- Verify GPIB Functionality 38
- GPIB Interface Terms 39
- Using LAN 41
- Setting Up the LAN Interface 42
- Setting up Private LAN 46
- Verifying LAN Functionality 46
- Using VXI–11 51
- Using Sockets LAN 52
- Using Telnet LAN 53
- Figure 2-7 Telnet 2000 Window 56
- Using FTP 57
- Figure 2-8 FTP Screen 58
- Using LXI 59
- Character Format Parameters 75
- If You Have Problems 75
- Using USB (Agilent MXG) 78
- Setting Up the USB Interface 79
- 3 Programming Examples 81
- Running C++ Programs 82
- Running C# Examples 83
- Running Basic Examples 83
- Running Java Examples 84
- Running MATLAB Examples 84
- Local Function 88
- Clear Function 88
- Output Function 89
- Programming Examples 100
- Figure 3-1 121
- VXI-11 Programming 124
- Sockets LAN Programming and C 128
- Queries for Lan Using Sockets 131
- Before Using the Examples 154
- Overview 161
- Status Register Bit Values 172
- Determining What to Monitor 173
- Deciding How to Monitor 173
- Status Register SCPI Commands 175
- Status Byte Group 179
- Status Byte Register 180
- Status Groups 181
- Standard Event Status Group 182
- STATus:OPERation:CONDition? 185
- Register) to 1 195
- Condition Register) to 1 201
- Condition register) to 1 204
- Understanding Waveform Data 211
- LSB and MSB (Bit Order) 212
- 1 0 1 1 0 1 1 1 213
- 1 1 1 0 1 0 0 1 213
- Byte Swapping 214
- DAC Input Values 214
- 2’s Complement Data Format 217
- I and Q Interleaving 217
- Waveform Structure 219
- Waveform Phase Continuity 221
- Waveform Memory 224
- Memory Allocation 226
- Memory Size 228
- Non–Volatile (NVWFM) Memory 230
- Option Size 230
- E4438C and E8267D 230
- Standard 3 MSa (15 MB) 230
- File Transfer Methods 231
- SCPI Command Line Structure 232
- FTP Procedures 236
- Creating Waveform Data 239
- Downloading Waveform Data 245
- Using Simulation Software 246
- Playing the Waveform 252
- Verifying the Waveform 253
- Using the Download Utilities 254
- E443xB Data Format 256
- Marker 3 and 4 bits 257
- C++ Programming Examples 259
- —Big and Little Endian Order 259
- _iq_c++.txt.” 259
- MATLAB Programming Examples 280
- _iq_ml.m.” 280
- HP Basic Programming Examples 292
- Mode Setup 300
- Signal Generator Memory 303
- Checking Available Memory 307
- Bit File Type Data 310
- Start block data 311
- Binary File Type Data 313
- User File Size 314
- Downloading User Files 318
- Modifying User File Data 324
- 2499 only) 329
- Understanding PRAM Files 333
- Viewing the PRAM Waveform 335
- PRAM File Size 336
- Extracting a PRAM File 342
- Modifying PRAM Files 344
- Data Requirements 345
- Data Limitations 345
- Save and Recall SCPI Commands 348
- User File Download Problems 363
- PRAM Download Problems 364
- Numerics 367
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