Agilent Technologies E8257C PSG Spécifications Page 54
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- Table des matières
- DEPANNAGE
- MARQUE LIVRES
Noté. / 5. Basé sur avis des utilisateurs
1-44
Troubleshooting
Troubleshooting Assembly–Level Problems
705 F/2 Test
1. Using an oscilloscope, check the 10 MHz Synthesis line on P33–15. The signal period should be
100 ns with an amplitude of approximately 3V
pp
.
• If the signal is good, replace the A6 Frac–N.
2. If the signal is bad, turn the signal generator power off, remove the A6 Frac–N, and measure
P33–15 again.
• If the signal is good, replace the A6 Frac–N.
3. If the signal is still bad, measure P41–5 on the A7 Reference.
• If the signal is good at P41–5, replace the A31 Motherboard.
• If the signal is bad at P41–5, replace the A7 Reference.
706 FM Path Test
1. Using an oscilloscope, check P31–22 (FM_On_H):
a. Loop self–test 706
b. Check for a TTL transition from 0 Vdc to +5 Vdc.
• If the signal is not present, refer to A5 Sampler troubleshooting.
2. If the signal is present, check P31–11 (FM):
a. Loop self–test 706.
b. Check for a 0 to 3.3 Vdc transition.
• If the signals is present, replace the A6 Frac–N.
• If the signal is not present, refer to A11 Pulse/Analog Modulation Generator
troubleshooting.
707 Sweep Phase Detector Test
1. Replace the A6 Frac–N.
- Service Guide 1
- Contents 10
- 1 Troubleshooting 11
- ESD) Information 12
- Running Self-Test 13
- A18 CPU Turn–On Test 14
- Checking the A18 CPU Voltages 15
- Error Messages 16
- P12−1 −5.2 Vdc 22
- P12−3 LIGHT_EN >3 Vdc 22
- Brightness = 1, VDSP = 3 Vdc 22
- P11−6 LCD_ENABLE_H >3 Vdc 23
- Local hardkey 25
- Power Supply Troubleshooting 27
- I/Q hardkey 46
- check in Step 2 47
- Table 1-13 53
- Pin 1 –5.2 Vdc –5.2 ±.1 Vdc 59
- Pin 17 –6 Vdc –6 ±.1 Vdc 59
- Pin 18 +9 Vdc +9 ±.1 Vdc 59
- A29 20 GHz Doubler J32 62
- A27 40 GHz Doubler J33 62
- A35 I/Q Modulator J34 62
- A30 Modulation Filter J31 62
- Troubleshooting Unlocks 74
- 515 10 MHz Signal Bad 75
- 520 Sampler Unlocked 75
- 521 YO Loop Unlocked 75
- Troubleshooting Unlevels 77
- Table 1-15 78
- Table 1-16 78
- A6 Frac-N 81
- A6 Frac-N 81
- Troubleshooting the RF Path 86
- ALC and RF problems 86
- Table 1-19 87
- Table 1-20 88
- Table 1-21 89
- 20 GHz Models 90
- 40 GHz Models Only 91
- Table 1-24 93
- Most Likely Assembly 94
- Overall Description 95
- Input/Output Interface 96
- Frequency Generation 97
- Amplitude A10 ALC 99
- Frequency and Phase A6 Frac–N 99
- Synthesis Loop 101
- A7 Reference 104
- A5 Sampler (CW mode only) 105
- A6 Frac–N 105
- A9 YIG Driver 106
- A28 YIG Oscillator (YO) 107
- A29 20 GHz Doubler 107
- Troubleshooting 108
- Loop Filter & 109
- RF Path Description 110
- A8 Output 111
- A30 Modulation Filter 112
- A25 High Band Detector 112
- ALC Loop 113
- Digital Modulation 115
- Self-Test Overview 120
- Asia Call Center Numbers 123
- 2 Assembly Replacement 126
- Outer Instrument Cover 130
- Assembly Replacement 131
- Inner Instrument Cover 132
- Front Panel 134
- Replacement Procedure 135
- A1 Keyboard 137
- A2 Display 139
- Figure 2-5 A2 Display Removal 140
- A2DS1 Display Backlight 141
- A3 Power Switch 143
- A4 Inverter 145
- UNR), and A8 Output 147
- Figure 2-10 A9 YIG Driver 150
- Tools Required 151
- Removal Procedure 151
- Figure 2-11 A10 ALC 152
- Figure 2-14 A13 I/Q MUX 158
- Figure 2-17 A18 CPU 164
- Figure 2-18 A18BT1 166
- A19 Power Supply 167
- Rear Panel (Standard) 169
- Rear Panel (Option 1EM) 172
- Figure 2-22 A20 SMI 176
- A21 Rear-Panel Interface 177
- A22 Line Module 179
- AT1 115 dB Attenuator 181
- A23 Lowband Coupler/Detector 185
- A25 20 GHz Highband Detector 191
- Figure 2-36 A26 MID 198
- A28 YIG Oscillator 201
- A31 Motherboard (E8247C/57C) 208
- A31 Motherboard (E8267C) 211
- A33 6 dB PAD 217
- Figure 2-44 A33 6 dB PAD 218
- Figure 2-47 B1 Fan 224
- 3 Replaceable Parts 226
- Ordering Information 227
- Replaceable Parts 228
- Assemblies from a Top View 235
- Assemblies from a Bottom View 241
- A18BT1 Lithium Battery 243
- Table 3-1 244
- Hardware 249
- Front Panel View 250
- Figure 3-12 Front Panel View 251
- Disassembled Front Panel View 252
- Disassembled Rear Panel View 254
- Detector Bias Board 260
- Bias Board 261
- Miscellaneous 273
- 4 Post-Repair Procedures 276
- Post-Repair Procedures Matrix 277
- FM In-band Offset Calibration 278
- Post-Repair Procedures 283
- 5 Safety and Regulatory 284
- General Safety Considerations 285
- Lithium Battery Disposal 286
- Assistance 286
- Certification 286
- Safety and Regulatory 287
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