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Agilent N5161A/62A/81A/82A/83A MXG Signal Generators User’s Guide 291
Custom Digital Modulation (Option 431)
Differential Encoding
NOTE The number of bits per symbol can be expressed using the following formula. Because the
equation is a ceiling function, if the value of x contains a fraction, x is rounded up to the
next whole number.
Where x = bits per symbol, and y = the number of differential states.
00000010 +2
00000011 0
Table 11-2
Data Offset Value
- Agilent Technologies 1
- N5161A/62A/81A/82A/ 1
- MXG Signal Generators 1
- Contents 10
- Documentation Overview 13
- 1 Signal Generator Overview 15
- Signal Generator Features 16
- Signal Generator Overview 17
- Modes of Operation 18
- MXG Vector Signal Generator 19
- N5181A 100 kHz – 6 GHz 19
- Signal Generator Overview 20
- 1. Host USB 23
- 2. Power Switch and LEDs 24
- 3. LAN LED 24
- 4. 1588 LED 24
- 5. ERROR LED 24
- 6. LAN Reset Hardkey 24
- 1. Active Function Area 25
- 2. Frequency Area 25
- 3. Annunciators 25
- 4. Amplitude Area 26
- 5. Error Message Area 27
- 6. Text Area 27
- 7. Softkey Label Area 27
- Annunciators 27
- Rear Panel Overview – N5161A 29
- /81A/82A MXG 29
- 5. PULSE 30
- 6. TRIG IN 30
- 7. TRIG OUT 30
- 8. REF IN 31
- 9. 10 MHz OUT 31
- 10. GPIB 31
- 12. Device USB 31
- typically <10 mV 32
- PAT TRIG 33
- DIGITAL BUS I/O 33
- 1. AC Power Receptacle 35
- 2. SWEEP OUT 35
- 13. Z AXIS OUTPUT 37
- 14. ALC INPUT 38
- User Preferences 40
- Power On and Preset 41
- Front Panel Knob Resolution 42
- Setting Time and Date 42
- Upgrading Firmware 43
- Remote Operation Preferences 44
- Listed in the 45
- Programming Guide 45
- page 32 45
- Figure 2-1 N5161A/62A/81A/82A 47
- Figure 2-2 N5183A 48
- Figure 2-3 N5161A/62A/81A/82A 49
- Figure 2-4 N5183A 50
- Enabling an Option 51
- Viewing Options and Licenses 52
- 3 Basic Operation 55
- Viewing Key Descriptions 56
- Entering Alpha Characters 57
- (vector models only) 58
- Basic Operation 59
- Basic Operation 60
- Setting ALC Bandwidth Control 61
- Configuring a Swept Output 62
- Figure 3-4 Sweep Softkeys 63
- Routing Signals 64
- Step Sweep 64
- Figure 3-7 Equipment Setup 66
- List Sweep 70
- Waveforms are available 71
- −2.5 > dBm 72
- Example: Using a Single Sweep 73
- Modulating the Carrier Signal 74
- Working with Files 76
- File Softkeys 77
- Storing a File 79
- Sequence Register 86
- Reading Error Messages 88
- AM Depth > value 90
- Removing a DC Offset 91
- Using Wideband AM 91
- Setting the Wideband AM 92
- 5 Optimizing Performance 93
- Optimizing Performance 100
- Optimizing Performance 101
- Using Flatness Correction 102
- Connect the Equipment 105
- Using I/Q Mod Skew Cal 113
- Measured output power 118
- Configure External Leveling 120
- ALC Off Mode 124
- Power Search Mode 125
- Power Search Settings 127
- Setting an Output Reference 128
- Reference, or Multiplier 130
- Using LXI (Option ALB) 134
- page 124 136
- page 50 136
- page 123 138
- For More Information 139
- Using a USB Keyboard 140
- Figure 6-1 Pulse Softkeys 142
- Pulse Characteristics 143
- Figure 6-2 Adjustable Doublet 144
- Figure 6-3 Trigger Doublet 144
- The Basic Procedure 145
- Pulse Train 147
- 5th, 6th, and 7th 148
- I/Q Modulation 152
- Waveform File Basics 156
- Figure 8-1 Dual ARB Softkeys 157
- Playing a Waveform Segment 159
- 5. Configure the RF Output: 160
- Waveform Sequences 161
- Creating a Sequence 162
- Editing a Sequence 163
- Playing a Sequence 164
- For details on each key 165
- Values differ between 169
- Using Waveform Markers 171
- Waveform Marker Concepts 172
- Accessing Marker Utilities 176
- Marker points on 181
- Setting Marker Polarity 184
- Sequence marker column 186
- 3 and 4 are enabled for this 186
- Triggering a Waveform 188
- Trigg er Typ e 189
- Trigg er Source 190
- Example: Gated Triggering 192
- Example: External Triggering 194
- Available only when 195
- How Power Peaks Develop 196
- Clipping a Waveform 197
- Figure 8-9 Circular Clipping 199
- Configuring Circular Clipping 202
- Scaling a Waveform 204
- Setting Waveform Scaling 208
- Modulated RF signal 212
- LO/carrier feedthrough 212
- I/Q Adjustments 217
- I/Q Calibration 219
- Using the Equalization Filter 221
- Figure 8-17 Filter Menu 223
- Figure 8-19 226
- Figure 8-20 228
- Figure 8-21 228
- These keys manage the table 229
- These softkeys select a 230
- (apodization function) for 230
- Modifying the Coefficients 231
- Storing the Filter to Memory 232
- There can be 1 to 15 238
- Figure 8-35 Add Waveform 250
- Figure 8-38 252
- ≥A.01.20 253
- 1. Create the waveform: 254
- For details on each 255
- Table 8-7 on page 242 255
- Important! Always 259
- Using Waveform 5–Pack History 260
- Licensing > 5–Pack History 261
- see page 249 262
- Waveforms 263
- Figure 8-46 264
- Figure 9-6 on page 256 266
- Custom Modulation 280
- Configuring the RF Output 286
- 3. Press RF On/Off 286
- Modulation Type > Select 288
- Opens the IS–95 295
- Figure 11-14 298
- Figure 11-15 299
- Figure 11-16 299
- Differential Encoding 303
- Data Value 00000011 306
- Using Differential Encoding 307
- Figure 11-21 308
- Figure 11-22 308
- −1. The symbol rotates 309
- Creating a Two–Tone Waveform 313
- For details on 314
- Using Multitone Modulation 318
- Removing a Tone 319
- Generating the Waveform 319
- Understanding Memory Types 323
- Erase All 326
- Erase and Overwrite All 327
- Erase and Sanitize All 327
- Secure Mode 328
- 14 Troubleshooting 331
- Signal Generator Lock–Up 332
- RF Output 332
- RF Output Power too Low 333
- Distortion 333
- Troubleshooting 334
- Troubleshooting 335
- Cannot Turn Off Sweep 336
- Sweep Appears Stalled 336
- Internal Media Data Storage 337
- USB Media Data Storage 337
- Error Messages 338
- Front Panel Tests 339
- Self Test Overview 340
- For instruments with 341
- Licenses 342
- Glossary 345
- Numerics 349
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