Agilent Technologies HP 54601B Guide de l'utilisateur télécharger pdf (Page 75)

Testing the eye opening of an eye pattern signal

There are generally two tests that you want to perform on an eye pattern

signal: an eye boundary test and an eye opening test. Since the eye boundary

can be easily tested by using normal mask template testing, this section

mainly focuses on how to create the mask for testing the eye opening.

A fail region in the shape of a hexagon is usually used to test the eye opening.

Figure 21 shows an example of the shape of the mask.

Example of the definition of an eye-pattern testing mask

Figure 21

Solutions

Testing the eye opening of an eye pattern signal

1 2 ... 70 71 72 73 74 75 76 77 78 79 80 ... 122 123

HP 54655A and 2
HP 54656A Test 2
Automation Modules 2
In This Book 5
Contents 6
3 Solutions 7
4 Test Sequencing Programming 7
5 Reference Information 7
Quick Start 10
Turn off the oscilloscope 12
1 . Then 13
Autoscale 13
Print/Utility 13
Press Setup 15
Operating the Test 16
Automation Module 16
To configure the interface 18
Press Print/Utility 19
Print with Factor ON 20
Figure 3 21
Module memories 23
To create a setup sequence 27
To execute a sequence 28
Print/Utility twice 29
Autostore 30
Autostore again 30
To spot the failure area 38
To define action messages 39
Label ** Test #xx ** 40
Pass PASS 40
Fail Min FAIL 40
Fail Max FAIL 40
Output 1 PASS 47
Output 2 FAIL 47
Output 3 OFF 47
Output 4 OFF 47
Output 5 OFF 47
Sequence step configuration 52
To copy a step or a mask 54
Figure 11 56
Turn the oscilloscope off 57
Turn the oscilloscope on 57
(HP 54656A only) 60
To document a single step 61
Solutions 62
Set the vertical sensitivity 67
Set the vertical position 67
Create the mask 67
Rise time testing mask 69
Determine the fail region 76
Horizontal accuracy 78
Figure 23 79
Figure 24 81
Test sequence example 82
Documentation of step #1 83
Documentation of step #2 83
Figure 28 84
Figure 29 84
Figure 30 85
Figure 31 85
Figure 32 86
Test Sequencing 88
Programming 88
Programming Conventions 90
:SEQuence:NEXT 91
:SEQuence:PREVious 92
:SEQuence:PROTect 93
:SEQuence:RESet 94
:SEQuence:SETup 95
:SEQuence:STEP 97
:SEQuence:TEST? 98
Reference 100
Information 100
Introduction 101
Operating Characteristics 102
Mask Template Testing 103
Hard copy Output 103
Reference Information 103
RS-232 pin out 105
Figure 34 106
Figure 35 106
Figure 36 107
Timing of the output lines 109
HP 54653A 110
ScopeLink 2.0 110
Software 110
To document a test sequence 116

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Agilent Technologies HP 54601B Guide de l'utilisateur Page 75

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