Agilent Technologies 8000 Series Dokumentacja Strona 48
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Oceniono. / 5. Na podstawie oceny klientów
Chapter 3: Testing Performance
To test bandwidth
48
10
Change the signal generator output frequency to 600 MHz for the MSO/DSO8064A or
1 GHz for the MSO/DSO8104A and set the power meter Cal Factor % to the appropriate
value from the calibration chart on the power sensor.
This step compensates the power meter reading for changes in the power sensor output at
500 MHz with respect to 10 MHz.
11
Adjust the signal generator output amplitude for a power reading as close as possible
to 0.0 dB[REL]. Write down the actual reading. Reading = ______ dB [REL].
The reading on the power meter will be used to correct the final bandwidth value.
12
Set the sweep speed to 1 ns/div using the horizontal sweep speed knob.
13 After the measurement settles (averaging complete), note the V
amptd(1)
reading.
14 Calculate the response using the formula:
For example:
15
Correct the result from step 14 with any difference in the power meter from step 11.
Observe signs. For example:
Result from step 14 = -1.19 dB
Power meter reading = -0.5 dB(REL)
then true response = (-1.19)-(-0.5) = -0.69 dB
(__________) - (__________) = _________dB
16
The result from step 15 should be between +3.0 dB and -3.0 dB. Record the result in
the Performance Test Record.
17 Switch the power splitter from the channel 1 to the channel 2 input.
18 Turn off the current channel and turn on the next channel using the channel keys.
19 Repeat steps 4 through 18 for the remaining channels, setting the parameters of the
channel being tested where appropriate.
Real Time Test
20
Select Acquisition from the Setup menu.
21 Select Real Time sampling mode, turn off Averaging, then select Close.
22 Repeat steps 4 through 19, testing all vertical channels with the upper frequency limit
as follows:
Agilent MSO/DSO8064A; 600 MHz
Agilent MSO/DSO8104A; 1 GHz
If the test fails
Failure of the bandwidth test can be caused by a faulty attenuator or main assembly, or the need for high-
frequency pulse response adjustment.
V
600 MHz or
V
1 GHz
________ mV=
response(dB)=20log
10
V
600 MHz or
V
1 GHz
V
10 MHz
---------------------------------------------
20log
10
________=_______dB=
20log
10
487 mV
559 mV
-------------------
20log
10
0.871 1.19dB–==
- 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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