Error Rate Measuring Apparatus for PAM4 Signal MSB LSB Data Division
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Solution Overview
Problem
Existing error rate measuring apparatuses lack the capability to divide and display most significant bit (MSB) and least significant bit (LSB) string data, making it difficult to compare and determine errors in these data sets, which hampers the assessment of forward error correction (FEC) operations.
Innovation Solution
An error rate measuring apparatus that inputs a PAM4 signal as a test signal to a device under test, sets desired parameters, and displays MSB and LSB string data on a screen, either in parallel or vertically, with line breaks according to FEC Symbol length, allowing for comparison and error discrimination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If symbol string data is not divided into MSB and LSB string data, then the display structure remains simple, but error discrimination between MSB and LSB cannot be performed
Solution Approach 1:
The patent divides symbol string data into most significant bit (MSB) string data and least significant bit (LSB) string data. This segmentation enables separate analysis and error discrimination for MSB and LSB components, directly resolving the technical contradiction by providing the needed measurement precision while managing complexity through structured division of the data
2Measurement precision
If MSB and LSB string data are not arranged in parallel, then the display layout remains simple, but comparison of MSB and LSB data cannot be performed
Solution Approach 1:
The patent arranges MSB and LSB string data in parallel on the display screen, utilizing spatial arrangement to enable direct visual comparison. This dimensional organization allows error discrimination and data comparison while maintaining an intuitive display structure that does not overly complicate the system
3Manufacturing precision
If FEC Symbol length is not considered in display arrangement, then the display format remains uniform, but line break positioning for accurate symbol alignment cannot be achieved
Solution Approach 1:
The patent incorporates FEC Symbol length as a parameter to control line break positioning in the display. By adjusting the display format based on this parameter, the system achieves accurate symbol alignment and positioning while adapting the display structure to the specific requirements of the communication standard, thereby resolving the contradiction between precision and complexity
Data Source
AI summary
An error rate measuring apparatus that inputs a PAM4 signal of a known pattern as a test signal to a device under test W, receives a signal from the device under test W compliant with the input of the test signal, and measures whether or not an FEC operation of the device under test W is possible based on a comparison result of the received signal and the test signal includes an operation unit that sets one Codeword length and one FEC Symbol length of the FEC as a setting parameter to the signal received from the device under test W according to a communication standard of the device under test W, and a display unit that parallel-displays MSB data and LSB data of each piece of symbol string data obtained by receiving and converting the signal from the device under test W on a display screen.