Data Packet Transceiver Loopback Testing Method
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Solution Overview
Problem
Existing methods for testing digital signal transceivers with multiple data packets require additional software and hardware overhead, leading to suboptimal implementation in mass production and potential over-design, making it difficult to identify all requirements during testing.
Innovation Solution
A method involving loop-back operation where test instruments transmit sequential data packets with distinct signal characteristics to a data packet transceiver, which decodes and re-encodes them for analysis, allowing for efficient testing of transmit and receive functions without extensive software or hardware modifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple data packets are used for testing, then manufacturing test time is reduced, but additional software functions and hardware overhead are required
Solution Approach 1:
The transceiver device itself performs the testing function by receiving data packets and generating loopback packets, eliminating the need for external testing equipment and complex software drivers. The device tests its own transmit and receive functions through self-contained loopback operation.
Solution Approach 2:
The transceiver device performs multiple functions - normal communication and self-testing - using the same hardware and software infrastructure. The loopback packet generation uses existing transmit and receive paths without requiring dedicated testing hardware or software.
2Reliability
If software drivers are modified to support multiple data packet testing, then comprehensive testing is achieved, but normal operation is adversely affected
Solution Approach 1:
The testing function is segmented from normal operation by using distinct packet types标识ed by packet type indicators. The transceiver can distinguish between normal data packets and loopback test packets, allowing independent optimization of each function without interference.
Solution Approach 2:
The system uses parameter changes in packet type indicators to differentiate between normal communication and testing modes. By modifying packet type parameters rather than fundamental operational parameters, the system achieves comprehensive testing while preserving normal operation characteristics.
3Measurement precision
If extensive software overhead is added for testing, then test coverage improves, but manufacturing effectiveness is reduced
Solution Approach 1:
The transceiver device performs comprehensive self-testing without external testing software overhead. The device autonomously generates loopback packets, transmits them, and monitors the transmit function, achieving complete test coverage through minimal external intervention.
Solution Approach 2:
The system implements feedback by monitoring whether loopback packets are successfully transmitted and received. This feedback mechanism provides comprehensive test coverage by verifying both transmit and receive functions, while the automated nature maintains high manufacturing effectiveness.
Data Source
AI summary
A method for testing a data packet transceiver as a device under test (DUT) by communicating, between one or more test instruments and the DUT, multiple data packets having at least one mutually distinct signal characteristic, such as data packet type, transmission power or transmission frequency.