Agilent Technologies 85032B/E 50 Especificações Página 229
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Theory of Operation 8712ET/ES and 8714ET/ES
System Theory RF Network Analyzers
6-14 Service Guide
Differences between 50Ω and 75Ω Analyzers.
Connections for the DUT (RF OUT and RF IN) are available in both 50Ω and 75Ω versions.
The two versions are identical except for the following:
• the type-N connectors (RF OUT and RF IN)
• the cable between the RF OUT connector and the directional coupler
• The directional coupler connected to the RF OUT. The transition from 75Ω to 50Ω occurs
within the directional coupler.
NOTE The 75Ω type-N connector at the RF IN port is specially constructed with an
internal 25Ω resistor to accomplish the 75Ω to 50Ω transition within the
connector.
Limiters.
Limiters are used to protect the circuitry on the receiver board from damage by overpower
or electrostatic discharge (ESD). The limiters are discrete parts, as shown in Figure 6-4.
The limiters begin limiting the applied signal at about +26 dBm. They protect the receiver
board much like a fuse: when a very high amount of power is applied to an input, the
limiter “fails” and becomes an open circuit. In actual practice, application of an excessive
amount of power to the input can change the characteristics of the limiter without creating
an open circuit condition. In this case, the limiter may exhibit symptoms of a degraded
match and/or increased attenuation.
- Service Guide 1
- Certification 2
- Documentation Map 3
- Contents 5
- 1 Performance Checks 9
- RF Network Analyzers 10
- 1-2 Service Guide 10
- Equipment List 11
- 6. Press 13
- 7. Press 13
- Service Guide 1-7 15
- Trigger Hold 17
- Performance Test Software 18
- Estimated Time 19
- Equipment 20
- File Structure 21
- Configuration File 22
- Getting Started 23
- Configuration Menu 24
- Service Guide 1-17 25
- 1-18 Service Guide 26
- CAL DATA ENTRY 26
- Using the Program 27
- Test Selection Menu 29
- Additional Information 30
- PRINT RESULTS 31
- PT01: Frequency Accuracy 32
- PT02: Gain Compression 33
- PT03: Noise Floor 34
- PT04: Dynamic Accuracy 35
- PT05: Power Flatness 36
- PT06: Absolute Power Accuracy 37
- 1-30 Service Guide 38
- PT08: Directivity 39
- 1-32 Service Guide 40
- PT09: Harmonics 41
- PT10: Trace Noise 42
- PT11: Crosstalk 43
- Specifications 44
- System Performance 45
- Service Guide 1-39 47
- Service Guide 1-41 49
- Service Guide 1-43 51
- Service Guide 1-45 53
- Service Guide 1-47 55
- Service Guide 1-49 57
- Service Guide 1-51 59
- Service Guide 1-53 61
- Service Guide 1-55 63
- Test Port Output 65
- Service Guide 1-59 67
- Test Port Input 71
- Service Guide 1-65 73
- Service Guide 1-67 75
- Service Guide 1-69 77
- 1. Narrowband detection mode 78
- Service Guide 1-71 79
- General Information 81
- Service Guide 1-75 83
- Service Guide 1-77 85
- 1-78 Service Guide 86
- Features 87
- Data Markers 88
- Marker Functions 88
- Internal Memory 88
- Disk Drive 88
- Network File System (NFS) 88
- Data Hardcopy 89
- Automation 89
- Measurement Calibration 90
- Calibration Interpolation 91
- Available Calibrations 91
- Calibration Kits 92
- Test Sets 93
- 2Adjustments 94
- 2-4 Service Guide 97
- Frequency Accuracy Adjustment 98
- Required Equipment 100
- Procedure 100
- In Case of Difficulty 101
- Service Guide 2-9 102
- SYSTEM OPTIONS 117
- 2-24 Service Guide 117
- 3Assembly Replacement 119
- Introduction 120
- Service Guide 3-3 121
- 3-4 Service Guide 122
- Service Guide 3-5 123
- 3-6 Service Guide 124
- Service Guide 3-7 125
- 3-8 Service Guide 126
- Service Guide 3-9 127
- 3-10 Service Guide 128
- Removing the Source Assembly 129
- 3-12 Service Guide 130
- Service Guide 3-13 131
- 3-14 Service Guide 132
- Removing the Coupler 133
- Installing the Coupler 134
- Installing the Switch 134
- Installing the Attenuator 135
- Installing the Limiter 136
- Service Guide 3-19 137
- Removing the Display Assembly 138
- Service Guide 3-21 139
- 3-22 Service Guide 140
- Service Guide 3-23 141
- How to Order Parts 142
- 8712ET/ES and 8714ET/ES 143
- Service Kit 145
- How to Use the Extender Board 146
- Initializing 147
- Operator's Check 148
- Check the Rear Panel LEDs 149
- 4-8 Service Guide 150
- Removing the Assemblies 151
- Error During Power-up 152
- Test Status LEDs 153
- 4-12 Service Guide 154
- Service Guide 4-13 155
- Service Guide 4-15 157
- Coefficients 158
- Front Panel Problems 159
- Other Power-Up Problems 159
- Other Error Messages 159
- 4-18 Service Guide 160
- Service Guide 4-19 161
- 4-20 Service Guide 162
- Service Guide 4-21 163
- 4-22 Service Guide 164
- Service Guide 4-23 165
- 4-24 Service Guide 166
- Service Guide 4-25 167
- 4-26 Service Guide 168
- Service Guide 4-27 169
- 4-28 Service Guide 170
- Service Guide 4-29 171
- Service Guide 4-31 173
- Mechanical Problems 175
- Receiver Detector Problems 175
- Service Guide 4-35 177
- 4-36 Service Guide 178
- RF Power Problems 179
- DIN Keyboard 180
- RS-232 Printers and Plotters 180
- Floppy Disk Drive Maintenance 180
- GPIB Systems 181
- LAN Troubleshooting 182
- Service Guide 4-41 183
- Testing between Two Analyzers 184
- 0.0.0.0 and 185
- LAN State ON off 185
- Service Guide 4-47 188
- 4-48 Service Guide 189
- 5Service Related Menus 190
- Figure 5-1 Service Key Menus 192
- Tests and Adjustments Menu 193
- Select Self-Test Menu 194
- Select Adjustment Menu 197
- Instrument Info 199
- Update Corr Const Menu 200
- Service Utilities Menu 1 201
- Meas Cal Options Menu 204
- Analog Bus Menu 205
- Service Guide 5-17 206
- Service Utilities Menu 2 208
- Service Utilities Menu 3 209
- Service Guide 5-21 210
- 5-22 Service Guide 211
- Syntax Summary 212
- Softkey SCPI Commands 212
- <num> 213
- Service Guide 5-25 214
- 6Theory of Operation 216
- System Theory 218
- 6-4 Service Guide 219
- Service Guide 6-5 220
- Power Supply (A6) 221
- Digital Control Group 221
- Display Assembly (A7) 222
- Source Group 223
- Service Guide 6-9 224
- Controlling Spurs 225
- Service Guide 6-11 226
- Receiver Assembly (A5) 227
- RF Path of the ET Analyzer 228
- Limiters 229
- Service Guide 6-15 230
- RF Path of the ES Analyzer 231
- 7Parts List 232
- Analyzer Hardware 233
- Parts” on page 3-24 234
- Service Guide 7-5 236
- Description 237
- HP/Agilent 237
- Part Number 237
- Service Guide 7-7 238
- Service Guide 7-9 240
- 7-10 Service Guide 241
- Service Guide 7-11 242
- 7-12 Service Guide 243
- 7-14 Service Guide 245
- Service Guide 7-17 248
- Service Guide 7-19 250
- Service Guide 7-21 252
- 8-2 Service Guide 254
- Service Guide 8-3 255
- In Case of Difficulties 256
- Obtaining Firmware 258
- Safety Symbols 260
- General Safety Considerations 261
- Lithium Battery Disposal 262
- Warranty 263
- Assistance 264
- Shipment for Service 264
- Service Guide 9-7 265
- Index Index-1 266
- 2-Index Index 267
- Index Index-3 268
- 4-Index Index 269
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