Agilent Technologies N5181A/82A User Manual Page 351
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Agilent N518xA, E8663B, E44x8C, and E82x7D Signal Generators Programming Guide 341
Creating and Downloading User-Data Files
Data Transfer Troubleshooting (N5182A, E4438C and E8267D Only)
Requirement for Continuous User File Data Transmission
“Integer Number of Timeslots” Requirement for Multiple-Timeslots
If a user file fills the data fields of more than one timeslot in a continuously repeating framed
transmission, the user file is restarted after the last timeslot containing completely filled data fields.
For example, if the user file contains enough data to fill the data fields of 3.5 timeslots, the firmware
loads 3 timeslots with data and restart the user file after the third timeslot. The last 0.5 timeslot
worth of data is never modulated.
To solve this problem, add or subtract bits from the user file until it completely fills an integer
number of timeslots
“Multiple-of-8-Bits” Requirement
For downloads to bit and binary memory, user file data must be downloaded in multiples of 8 bits
(bytes), since SCPI specifies data in bytes. Therefore, if the original data pattern’s length is not a
multiple of 8, you need to:
• add bits to complete the ASCII character
• replicate the data pattern to generate a continuously repeating pattern with no discontinuity
• truncate the excess bits
NOTE The “multiple- of- 8- bits” data length requirement is in addition to the requirement of
completely filling the data field of an integer number of timeslots.
Using Externally Generated, Real-Time Data for Large Files
When the data fields must be continuous data streams, and the size of the data exceeds the available
PRAM, real- time data and synchronization can be supplied by an external data source to the
front-panel DATA, DATA CLOCK, and SYMBOL SYNC connectors. This data can be continuously
transmitted, or can be framed by supplying a data-synchronous burst pulse to the EXT1 INPUT
connector on the front panel. Additionally, the external data can be multiplexed into internally
generated framing
PRAM Download Problems
Table 8-13 PRAM Download - Symptoms and Causes
Symptom Possible Cause
The transmitted pattern is interspersed
with random, unwanted data.
Pattern reset bit not set.
Insure that the pattern reset bit (bit 7, value 128) is set on the last byte of your
downloaded data.
- Programming Guide 1
- Contents 3
- Documentation Overview 9
- Interfaces 13
- Agilent IO Libraries Suite 15
- Programming Languages 19
- Using the Web Browser 20
- Agilent MXG Web Server On 21
- ESG/PSG/E8663B Web Server On 21
- Preferences 26
- Getting Help (Agilent MXG) 28
- Getting Help (ESG/PSG/E8663B) 28
- Error Messages 29
- Error Message Types 30
- 2 Using IO Interfaces 31
- Using GPIB 32
- Set Up the GPIB Interface 34
- Verify GPIB Functionality 35
- GPIB Interface Terms 35
- Using IO Interfaces 36
- Using LAN 38
- Setting Up the LAN Interface 39
- Setting up Private LAN 44
- Verifying LAN Functionality 44
- Table 2-1 Ping Responses 45
- Using VXI-11 47
- Using Sockets LAN 49
- Using Telnet LAN 49
- Figure 2-7 Telnet 2000 Window 52
- Using FTP 53
- Figure 2-8 FTP Screen 54
- Character Format Parameters 59
- If You Have Problems 59
- Using USB (Agilent MXG) 63
- Setting Up the USB Interface 65
- 3 Programming Examples 67
- Running C++ Programs 69
- Running C# Examples 70
- Running Basic Examples 70
- Running Java Examples 71
- Running MATLAB Examples 71
- Running Perl Examples 71
- Clear Function 75
- Output Function 75
- • resets instrument 79
- • resets the signal generator 84
- • reads the various settings 84
- • verifies RF state off 88
- Programming Examples 100
- Figure 3-1 108
- VXI-11 Programming 111
- Sockets LAN Programming and C 115
- Queries for Lan Using Sockets 117
- Before Using the Examples 141
- Overview 148
- Status Register Bit Values 158
- Determining What to Monitor 159
- Deciding How to Monitor 159
- Status Register SCPI Commands 161
- Status Byte Group 164
- Status Byte Register 165
- Status Groups 166
- Standard Event Status Group 167
- STATus:OPERation:CONDition? 170
- Register) to 1 180
- Condition Register) to 1 186
- Condition register) to 1 189
- Understanding Waveform Data 195
- LSB and MSB (Bit Order) 196
- 1 0 1 1 0 1 1 1 197
- 1 1 1 0 1 0 0 1 197
- Byte Swapping 198
- DAC Input Values 198
- 2’s Complement Data Format 201
- I and Q Interleaving 201
- Waveform Structure 203
- I/Q File 204
- Waveform Phase Continuity 205
- Waveform Memory 208
- Memory Allocation 210
- Memory Size 212
- Waveform Data Encryption 214
- File Transfer Methods 215
- SCPI Command Line Structure 215
- FTP Procedures 220
- Creating Waveform Data 222
- Code Algorithm 223
- Downloading Waveform Data 228
- Using Simulation Software 229
- Playing the Waveform 235
- Verifying the Waveform 236
- Using the Download Utilities 237
- E443xB Data Format 238
- Marker 3 and 4 bits 240
- C++ Programming Examples 242
- MATLAB Programming Examples 265
- HP Basic Programming Examples 277
- Mode Setup 287
- Signal Generator Memory 291
- Checking Available Memory 295
- Bit File Type Data 298
- Start block data 299
- Binary File Type Data 301
- User File Size 302
- Downloading User Files 306
- Modifying User File Data 312
- 2499 only) 316
- Understanding PRAM Files 320
- Viewing the PRAM Waveform 322
- PRAM File Size 323
- Extracting a PRAM File 329
- Modifying PRAM Files 331
- Data Requirements 332
- Data Limitations 332
- Save and Recall SCPI Commands 335
- User File Download Problems 350
- PRAM Download Problems 351
- Numerics 355
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