Agilent Technologies 8000 Series Specifikace Strana 49
- Strana / 162
- Tabulka s obsahem
- ŘEŠENÍ PROBLÉMŮ
- KNIHY
Hodnocené. / 5. Na základě hodnocení zákazníků
Chapter 3: Testing Performance
To verify threshold accuracy
49
To verify threshold accuracy
This test verifies the data channel threshold accuracy specifications of the Mixed Signal
Oscilloscopes. The threshold voltage is the digital channel input voltage at which a bit transitions
from logic 0 to logic 1 (low-to-high transition) or from logic 1 to logic 0 (high-to-low transition).
Specification:
Threshold accuracy = ±
(100 mV + 3% of threshold setting).
When to Test You should perform this test every 24 months or after 4000 hours of operation,
whichever comes first.
What to Test Use these instructions to test the threshold accuracy of digital channels D15-D0.
Verifying Test Results After each threshold test, record the voltage reading in the
Performance Test Record at the end of this chapter. If the voltage readings are within the limits
in the Performance Test Record, the test passes.
Let the Equipment Warm Up Before Testing For accurate test results, let the test
equipment and the oscilloscope warm up at least 30 minutes before testing.
Equipment Required
Test Threshold Accuracy only on the Mixed-Signal Oscilloscopes (MSOs)
This test can only be performed on oscilloscope models that have digital channels.
Equipment Critical Specifications Recommended Model/Part
Digital Multimeter 100 µV resolution, DC voltage measurement
accuracy better than ±0.01% of reading
Agilent 34401A
DC Signal Source Voltage range ±5.5 V
Voltage setting resolution ±5 mV
Agilent 3631A or Fluke 5820A
Adapter BNC Tee (m)(f)(f) Agilent 1250-0781
Coaxial Cable
(Qty. 2)
Length ~ 1 m
BNC (m) connectors on both ends
50 Ω characteristic impedance
Agilent 8120-1840
Digital Cable
Assembly
No substitute Agilent 54826-61605
(Included in 54826-68701 logic probe kit)
Probe Tip Assembly No substitute Agilent 54838-61608
Probe Grounds
(Qty. 5)
No substitute Agilent 5959-9334
Adapter or BNC
Breakout
BNC (f) to 20 AWG leads Pomona 4969
Header Strip ≥0.1 inch (2.54 mm) spacing
≥32 pins
Waldom Electronics 10-89-1161
Wire Strips
(Qty. 2)
~1.5 inches (4 cm) in length
20 AWG
Adapter BNC (f) to dual banana Agilent 1251-2277
- Service Guide 1
- In This Book 5
- Contents 7
- 6 Replacing Assemblies 8
- 7 Replaceable Parts 8
- 8 Theory of Operation 8
- General Information 10
- Accessories supplied 13
- Accessories available 14
- Options available 15
- ± 5°C from the temperature 16
- Environmental Conditions 17
- Measurement Category 17
- Oscilloscope Dimensions 18
- Preparing for Use 19
- Setting Up the Oscilloscope 20
- To inspect package contents 21
- Figure 2-1 21
- To connect power 22
- Attaching the Probe Connector 25
- Probing the Circuit 26
- To connect the digital probe 28
- Digital probe lead set 29
- 40-pin Connector Pinout 30
- Figure 2-14 31
- To turn on the oscilloscope 32
- To turn off the oscilloscope 32
- Probe Compensation 33
- To clean the oscilloscope 35
- Testing Performance 37
- Clear Display 39
- Averaging 39
- Specifications 39
- Performance Test Procedures 39
- Fluke MET/CAL Procedures 39
- To test the DC calibrator 40
- To test input resistance 42
- Connect the equipment 43
- Select Close 45
- (Supply) Minimum Maximum 45
- Set the scale from the 46
- Set the offset from the 46
- To test bandwidth 47
- To verify threshold accuracy 49
- Connections 50
- High-to-Low Transitions 55
- Threshold Voltage Setting V2 56
- Low-to-High Transitions 57
- To test time scale accuracy 59
- Oscilloscope 60
- Sine Wave Source 60
- Frequency Reference 60
- Agilent Technologies 64
- Range Supply Limits 65
- Performance Test Record 66
- Calibrating and Adjusting 67
- To run the self calibration 69
- Troubleshooting 71
- Default Setup 73
- 54830F01a 75
- Primary Trouble Isolation 76
- Run oscilloscope self-tests 77
- Self Calibration 78
- Performance” on page 37 78
- No Display Trouble Isolation 79
- Input Pin # 7 65432 1 81
- Replace any shorted assembly 84
- Replace the power supply 84
- To check probe power outputs 85
- To Check the keyboard 86
- To check the LEDs 87
- Intel D915GUX Motherboard 88
- To Reset 89
- 5 and 7 89
- To setup the BIOS 91
- Figure 5-12 93
- Software Revisions 94
- Replacing Assemblies 95
- Bottom sleeve fasteners 99
- Removing bottom sleeve 100
- Connecting Mylar flex sables 101
- Disconnecting W8 104
- Access Hole 105
- Removing the BNC nuts 108
- Figure 6-17 112
- Opening in side of 131
- Fan control board cables 131
- Acquisition board cables 131
- Figure 6-32 132
- Lift board out of chassis 134
- To remove and replace a fan 135
- Mylar flex cables 136
- T10 Torx Screws 136
- Replaceable Parts 137
- Power Cords 139
- Exploded Views 140
- Replaceable Parts List 145
- Theory of Operation 149
- Figure 8-1 150
- Logic Trigger 154
- Attenuator Theory 155
- Acquisition Theory 155
- • Trigger levels 156
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