Codeword Position Display for Error Rate Measuring Apparatus
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Solution Overview
Problem
Existing error rate measuring apparatuses lack the ability to display the relative positional relationship between the currently selected codeword position and the codeword head position in a recognizable manner, making it difficult to identify where errors occur and whether forward error correction is possible.
Innovation Solution
An error rate measuring apparatus that inputs NRZ or PAM4 signals as test signals to a device under test, calculates and displays the codeword position information, allowing users to recognize the relationship between the codeword position and its delimiter through a cursor on a display screen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If codeword position information is not displayed, then the display interface remains simple, but users cannot recognize the relationship between codeword position and delimiter
Solution Approach 1:
The display interface is segmented to show codeword head position and current cursor position separately. The codeword position information is divided into distinct visual elements that indicate the relationship between codeword delimiters and current selection, allowing users to understand position relationships without overwhelming complexity.
Solution Approach 2:
A cursor is introduced as an intermediary visual element on the display screen to indicate the current selection position. The cursor acts as a mediator between the user and the codeword position information, providing intuitive visual feedback about the relationship between current position and codeword delimiters without requiring complex display processing.
2Difficulty of detecting and measuring
If detailed codeword position information is displayed, then error identification becomes easier, but the display processing becomes more complex
Solution Approach 1:
The system pre-calculates and stores codeword head positions based on the received signal structure before display. By performing the position calculation in advance and storing it in memory, the system reduces real-time processing complexity while maintaining the ability to provide detailed position information for error detection.
Solution Approach 2:
The display system automatically updates codeword position information based on cursor movement and signal structure without requiring manual intervention. The system self-manages the calculation and display of position relationships, reducing the operational complexity for users while providing comprehensive error detection capability.
Data Source
AI summary
An error rate measuring apparatus includes an operation unit that sets a codeword length and an FEC symbol length, a display unit that displays bit string data obtained by converting a signal from a device under test, a codeword position calculation means for calculating a codeword head position from the FEC symbol length, codeword head symbol information, and an FEC symbol position, calculating codeword position information of a zeroth address of a display screen from the codeword head position, the codeword length, and the FEC symbol length, and calculating position information of a codeword at a currently selected position of a cursor from the codeword position information of the zeroth address of the display screen, the codeword length, the FEC symbol length, and a position of the cursor on the display screen, and display control means for displaying the calculated position information of the codeword on the display screen.