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Creating a frequency testing mask
A mask can be used to test the frequency of the input signal. The shape of
the mask varies depending on the shape of the signal to be tested. A mask
designed for testing a sine wave cannot be used to test a square wave.
Different masks are needed for different shapes of signals. Using the
calibrated vertical vernier, position, and time base of the
Agilent 54600–Series oscilloscope, a mask can be re-used to test signals of
similar shapes but different frequencies and amplitudes.
To test the frequency of the signal, the period of the signal is tested instead
of actually measuring the frequency. The test can be conducted by triggering
on an edge of the signal and testing for the location of the second edge. An
example mask is shown in the following figure.
Example mask for testing the frequency of a sine wave
Figure 2– 14
Operating the Measurement/Storage Module
Creating a frequency testing mask
2–44
- Agilent 54657A, 54658A 1
- Measurement/Storage Modules 1
- Accessories available 3
- In This Book 4
- Contents 7
- 3 Reference Information 8
- Installation 10
- Turn off the oscilloscope 11
- To configure the interface 12
- 54645b08.cdr 14
- 54657b07.cdr 15
- Operating the 17
- Measurement/Storage Module 17
- • Math Functions 18
- • Automatic Measurements 18
- • Cursor Measurements 18
- • Trace Storage 18
- Math Functions 19
- Function 1 20
- Function 2 21
- Integrate and Offset 22
- is volt seconds 23
- ± key is pressed 25
- Aliasing 25
- Cursors key to set the 27
- Cursors 27
- Cursors 27
- FFT Measurements 28
- Automatic Measurements 30
- Setting Thresholds 31
- Press Time 32
- Figure 2– 6 34
- Time 35
- Automatic Delay Measurement 36
- Figure 2– 8 38
- Vtop–Vbase 39
- Vbase–Vtop 39
- Voltage 40
- Cursors 41
- Autostore 47
- Press the Mask Test softkey 49
- Cursors key to move the 50
- To start waveform monitoring 54
- Creating a delay testing mask 58
- Determine the fail region 67
- To save or recall traces 68
- Trace 70
- To set real-time clock 71
- Press the Set Date softkey 72
- Reference Information 73
- Operating Characteristics 75
- Figure 3–1 77
- RS-232 Configurations 79
- Programmability 79
- DECLARATION OF CONFORMITY 83
- Product Regulations 84
- Press this key . . 87
- . . . to obtain this menu 87
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