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Chapter 2: Calibration
To run the self calibration
16
Figure 2-1
Calibration Dialog
Box
4
Click Start, then follow the instructions on the screen.
The routine will ask you to do the following things in sequence:
a Decide if you want to perform the Time Scale Calibration. Your choices are:
• Standard Calibration - Time scale calibration will not be performed. Time scale
calibration factors from the previous time scale calibration will be used and the 10 MHz
reference signal will not be required. The remaining calibration procedure will continue.
• Standard Calibration and Time Scale Calibration - Performs the time scale calibration.
This option requires you to connect a 10 MHz reference signal to channel 1 that meets
the following specifications. Failure to use a reference signal that meets this specification
will result in an inaccurate calibration.
• Standard Calibration and Reset Time Scalie Calibration - Factory time scale calibration
factors will be used. The 10 MHz reference signal will not be required. The remaining
calibration procedure will continue.
b Disconnect everything from all inputs and Aux Out.
c Connect the calibration cable from Aux Out to channel 1.
You must use the 54855-61620 cable assembly with two 54855-67604 adapters for all
oscilloscopes except for the DSO90254A which can use a good quality BNC cable. Failure
to use the appropriate calibration cable will result in an inaccurate calibration.
d Connect the calibration cable from Aux Out to each of the channel inputs as requested.
e Connect the 50 Ω BNC cable from the Aux Out to the Aux Trig on the front panel of the
oscilloscope.
f A Passed/Failed indication is displayed for each calibration section. If any section fails,
check the calibration cables and run the oscilloscope Self Test in the Utilities menu.
Page 87 also has a little section on what to do if a self cal fails in terms of replacing
assemblies.
5
After the calibration procedure is completed, click Close.
Click here to start
calibration
Clear this check
box before starting
calibration
Frequency: 10 MHz ±0.4 ppm = 10 MHz ±4 Hz
Amplitude: 0.2 Vpeak-to-peak to 5.0 Vpeak-to-peak
Wave shape: Sine or Square
- Service Guide 1
- In This Service Guide 3
- Contents 5
- 6 Replaceable Parts 6
- 7 Theory of Operation 6
- General Information 7
- Accessories supplied 10
- Environmental Conditions 11
- Measurement Category 11
- Oscilloscope Dimensions 12
- Calibration 13
- To run the self calibration 15
- Testing Performance 17
- Performance Test Interval 18
- Performance Test Record 18
- Test Order 18
- Test Equipment 18
- • Offset Accuracy Test 20
- • DC Gain Accuracy Test 20
- • Analog Bandwidth Test 20
- Offset Accuracy Test 21
- Record the 23
- Channel 1 27
- DC Gain Accuracy Test 29
- Set the Aux Out voltage (V 31
- ) to +15 mV as follows: 31
- Click here and enter 16E-9 37
- 4 divisions 38
- RMS using the expression: 38
- Time Scale Accuracy (TSA) 42
- Agilent Technologies 45
- Troubleshooting 51
- Primary Trouble Isolation 54
- Self Calibration 56
- Chapter 4: Troubleshooting 58
- Figure 4-4 58
- Under-Voltage Fault 60
- Over-Temperature Fault 65
- Trigger ICs fan 66
- Over-Voltage Fault 68
- The second and third 69
- LEDs are located 69
- Display Trouble Isolation 71
- Input Pin # 7 65432 1 73
- Front Panel Trouble Isolation 77
- Motherboard Verification 78
- To setup the BIOS 79
- To check the LEDs 85
- Software Revisions 86
- To check probe power outputs 87
- Replacing Assemblies 89
- Figure 5-20 102
- (Figure 5-35) 110
- Figure 5-36 111
- Perform self tests 113
- Performance calibration 113
- Figure 5-41 116
- SATA cables 118
- Power harness 119
- C power 122
- 12V power 122
- Replaceable Parts 127
- Exploded Views 129
- Chapter 6: Replaceable Parts 130
- Replaceable Parts List 133
- Theory of Operation 137
- Figure 7-1 138
- Acquisition Boards 140
- Backplane Board 140
- Figure 7-6 146
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