Agilent-technologies E8247C PSG CW Manuale Utente Pagina 132
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122 Chapter 6
Custom Arb Waveform Generator
Working with User-Defined Setups (Modes)-Custom Arb Only
Working with User-Defined Setups (Modes)−Custom Arb Only
Modifying a Single-Carrier NADC Setup
In this procedure, you learn how to start with a single-carrier NADC digital modulation and modify it to a
custom waveform with customized modulation type, symbol rate, and filtering.
1. Press
Preset.
2. Press
Mode > Custom > ARB Waveform Generator > Setup Select > NADC.
3. Press
Digital Mod Define > Modulation Type > PSK > QPSK and OQPSK > QPSK.
4. Press
Symbol Rate > 56 > ksps.
5. Press
Filter > Select > Nyquist.
6. Press
Return > Return > Digital Modulation Off On.
This generates a waveform with the custom single-carrier NADC digital modulation state. The display
changes to Dig Mod Setup: NADC (Modified). During waveform generation, the DIGMOD and
I/Q annunciators appear and the custom single-carrier digital modulation state is stored in volatile
memory.
7. Set the RF output frequency to 835 MHz.
8. Set the output amplitude to 0 dBm.
9. Press
RF On/Off.
The user-defined NADC signal is now available at the RF OUTPUT connector.
10. Press
Return > Return.
This returns to the top-level Digital Modulation menu, where
Digital Modulation Off On is the first softkey.
11. Press
Digital Mod Define > Store Custom Dig Mod State > Store To File.
If there is already a file name from the Catalog of DMOD Files occupying the active entry
area, press:
Edit Keys > Clear Text
12. Enter a file name (for example, NADCQPSK) using the alpha keys and the numeric keypad.
13. Press
Enter.
The user-defined single-carrier digital modulation state should now be stored in non-volatile memory.
The RF output amplitude, frequency, and operating state settings are not stored as part of a user-defined
digital modulation state file.
- User’s Guide 1
- Contents 10
- 1 Signal Generator Overview 11
- Firmware Upgrades 14
- Modes of Operation 15
- Front Panel 16
- Recall hardkey 17
- 8. Trigger 18
- 9. MENUS 18
- 10. Help 18
- 11. EXT 1 INPUT 18
- Mod On/Off hardkey 19
- 35. DATA CLOCK INPUT 22
- 36. SYMBOL SYNC INPUT 22
- 33. I/Q INPUTS 22
- 34. DATA INPUT 22
- Front Panel Display 23
- 3. Annunciators 24
- 5. Amplitude Area 26
- 6. Error Message Area 26
- 7. Text Area 26
- 8. Softkey Label Area 26
- Rear Panel 27
- 1. AC Power Receptacle 28
- 3. AUXILIARY INTERFACE 28
- 11. EVENT 1 30
- 12. EVENT 2 30
- 13. PATTERN TRIG IN 30
- 14. BURST GATE IN 30
- 15. AUXILIARY I/O 31
- 16. Digital Bus 32
- 17. WIDEBAND I INPUT 32
- 18. WIDEBAND Q INPUT 32
- 20. I OUT 32
- 21. I-bar OUT 33
- 22. Q OUT 33
- 23. Q-bar OUT 33
- 24. BASEBAND GEN REF IN 33
- 26. 10 MHz OUT 34
- 27. 10 MHz IN 34
- 28. 10 MHz EFC (Option UNR) 34
- 2 Basic Operation 35
- Using Table Editors 36
- Table Editor Softkeys 37
- Configuring the RF Output 38
- OFFS indicator 39
- Ampl Offset > 10 > dB 40
- RF On/Off 43
- Single Sweep 43
- Sweep Repeat Single Cont 43
- Sweep Type List Step 44
- Configure List Sweep 44
- Markers 50
- Turn Off Markers 52
- Sweep/List 52
- Configure Ramp/Step Sweep 52
- Freq Start 52
- Return > Sweep > Off 54
- Return > Sweep > Ampl 54
- Modulating a Signal 60
- Using Data Storage Functions 62
- Enabling Options 67
- 3 Optimizing Performance 69
- Using External Leveling 70
- Configure Cal Array 77
- GPIB Listener Mode 79
- 4 Analog Modulation 87
- Analog Modulation Waveforms 88
- Configuring AM 89
- Configuring FM 90
- Configuring ΦM 91
- Configuring Pulse Modulation 92
- Configuring the LF Output 93
- 86 Chapter 4 96
- Analog Modulation 96
- First-Level Softkey Men 99
- (Some ARB formats 99
- Amplitude hardkey menu 101
- Chapter 5 93 103
- 94 Chapter 5 104
- Select Waveform softkey 105
- ARB Off On to On 105
- Current waveform file type 107
- Waveform File Type 107
- Accessing the Dual ARB Player 109
- Creating Waveform Segments 110
- Playing a Waveform 112
- Editing a Waveform Sequence 112
- Renaming a Waveform Segment 113
- Using Waveform Markers 114
- To Verify Marker Operation 117
- Waveform Marker Concepts 118
- Using Waveform Triggers 121
- Using Waveform Clipping 122
- Waveform Clipping Concepts 123
- Chapter 5 117 127
- 118 Chapter 5 128
- Custom Arb Waveform Generator 129
- Overview 130
- −625 kHz and a 133
- Working with Filters 135
- Using a Predefined FIR Filter 136
- Edit Keys > Clear Text 141
- 132 Chapter 6 142
- Working with Symbol Rates 143
- 134 Chapter 6 144
- Chapter 6 135 145
- Working with Modulation Types 146
- Configuring Hardware 153
- To Set the ARB Reference 154
- Custom Real Time I/Q Baseband 155
- Working with Data Patterns 157
- Edit File 160
- Cursor moves to new position 161
- Position indicator changes 161
- Bits 4C through 4F inverted 162
- Hex Data changed 162
- Working with Burst Shapes 163
- Return > Return > 166
- Editing Keys > Clear Text 166
- To Adjust the I/Q Scaling 169
- Working with Phase Polarity 170
- Using Differential Encoding 175
- 1 > Enter 176
- +/- > 1 > Enter 176
- 2 > Enter 176
- 0 > Enter 177
- 168 Chapter 7 178
- Multitone Waveform Generator 179
- Freq Spacing > 1 > MHz 181
- Multitone Off On to On 181
- To View a Multitone Waveform 182
- Toggle State 183
- Edit Item > -10 > dB 184
- Edit Item > 123 > deg 184
- Apply Multitone 184
- Multitone 184
- 9 Two-Tone Waveform Generator 189
- To Create a Two-Tone Waveform 191
- To View a Two-Tone Waveform 192
- Chapter 9 183 193
- Two-Tone Waveform Generator 193
- Figure 9-3 193
- Chapter 9 185 195
- Figure 9-4 195
- Two Tone 196
- 10 Troubleshooting 197
- 188 Chapter 10 198
- Troubleshooting 198
- RF Output Power Problems 199
- Sweep Problems 204
- Configure Step Sweep 205
- Step Dwell softkey 205
- Data Storage Problems 206
- Cannot Turn Off Help Mode 207
- Signal Generator Locks Up 208
- Preset key 209
- Error Messages 210
- Error Message Format 211
- Error Message Types 212
- 204 Chapter 10 214
- , 29, 30 218
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