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Chapter 5 How to Operate BERT
5-10
5.2.3
Setting Patterns
The following three test patterns can be selected.
PRBS
1/2 Clock Pattern
1/16 Clock Pattern
PRBS
PRBS is the pattern generated at the hardware.
The generated pattern length, maximum length of contiguous 1s, and
maximum length of contiguous 0s differ depending on the hardware
configuration.
The following block diagram indicates the hardware generating PRBS
2^7–1.
Figure 5.2.3-1 Block Diagram for PRBS Generating Circuit
This block diagram is composed of a shift register composed of a
seven-stage flip-flop and an Exclusive OR circuit. A signal of the sixth and
seventh stages of the shift register are input to the Exclusive OR and the
output of the Exclusive OR is input to the shift register. This type of
configuration is described by the following pattern generation polynomial.
1 + X
6
+ X
7
When inputting the default value of 7 bits and impressing the clock, a
pattern with a bit length of 2
7
–1 = 127 is repeatedly generated. The
default value of seven bits includes 1 or more “1” bits.
The following shows the pattern length, maximum number of contiguous
1s, and maximum number of contiguous 0s using the PRBS generation
formula of the MP2110A.
D Q
D Q
D Q
D Q
D Q
D Q
D Q
Clock
Output
Flip-flop
×
7
Exclusive OR
1
2
3
4
5
6
7
Initial value
Содержание BERTWave Series
Страница 26: ...VI...
Страница 74: ...Chapter 1 Outline 1 48...
Страница 166: ...Chapter 4 Screen Operation 4 24...
Страница 210: ...Chapter 6 How to Operate Sampling Scope 6 16 Figure 6 2 2 4 Switching Graph Display...
Страница 237: ...6 2 Explanation of Windows 6 43 6 How to Operate Sampling Scope Figure 6 2 4 9 Measure Dialog Box Equalizer Tab...
Страница 239: ...6 2 Explanation of Windows 6 45 6 How to Operate Sampling Scope Figure 6 2 4 10 Measure Dialog Box Mask Test Tab...
Страница 246: ...Chapter 6 How to Operate Sampling Scope 6 52 Figure 6 2 6 2 Time Dialog Box CRU Tab When MP2110A 054 is installed...
Страница 309: ...6 9 Measuring Waveform 6 115 6 How to Operate Sampling Scope Figure 6 9 5 1 Marker Display...
Страница 322: ...Chapter 6 How to Operate Sampling Scope 6 128...
Страница 377: ...8 6 Adding an Option License 8 11 8 Maintenance 10 Click System Menu System Information and confirm the added option...
Страница 380: ...Chapter 8 Maintenance 8 14 7 Click Reinstall Windows 8 Click Yes...
Страница 432: ...Appendix A Specifications A 36...
Страница 457: ...D 3 Sampling Oscilloscope D 11 Appendix D 26G 53G CRU MP2110A 055 Table D 3 7 CRU Output Sensitivity Pass Fail...
Страница 458: ...Appendix D Performance Test Record Form D 12...
Страница 466: ...Index Index 6...