Cabled Interconnect Stress Testing for Signal Integrity Validation
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Solution Overview
Problem
Existing methods fail to effectively test the signal integrity of cabled interconnects under mechanical stress, which is crucial for high-speed input/output digital links in information handling systems due to the sensitivity of evolving HSIO fabrics to minute physical deformations caused by tightly packed cables.
Innovation Solution
A system and method involving a mechanical stressor to apply stress to a cable connector interface, coupled with a controller to perform vector network analysis measurements before and after stress application, determining signal integrity requirements based on differences in electrical parameter measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If cables are tightly packaged to reduce physical space, then space utilization is improved, but mechanical stress on connector-to-wire interfaces increases causing signal integrity degradation
Solution Approach 1:
The patent applies preliminary action by performing mechanical stress testing on cabled interconnects before they are installed in the final tightly-packaged configuration. The testing system applies controlled mechanical stresses (bending, twisting, compression, tension) to simulate the conditions that will exist in the deployed system, allowing potential signal integrity issues to be detected and addressed before final assembly. This prevents reliability problems from arising in the field due to the inevitable mechanical stress from tight cable packaging.
2Measurement precision
If mechanical stress testing is performed on cabled interconnects, then signal integrity assessment is improved, but testing complexity and time increase
Solution Approach 1:
The patent applies universality by designing a multi-functional testing system that can perform multiple types of mechanical stress testing (bending, twisting, compression, tension) and multiple types of electrical testing (signal integrity, continuity, impedance) using a single integrated platform. The system includes a mechanical stressor that can apply various mechanical loads and a controller that coordinates both mechanical and electrical measurements. This multi-functional approach improves measurement precision for signal integrity assessment while reducing overall testing complexity compared to using separate specialized devices for each type of test.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables accurate assessment of signal integrity in cabled interconnects under mechanical stress, ensuring compliance with performance standards and identifying potential failures.
Implementation Method 1
a mechanical stressor configured to apply mechanical stress to a cable coupled to a test circuit board via a connector-cable interface in order to cause mechanical stress upon the connector-cable interface
Implementation Method 2
The controller may be configured to transmit one or more first test signals to electrical pathways of the connector-cable interface in the absence of mechanical stress applied by the mechanical stressor to the connector-cable interface, perform first vector network analysis measurements for one or more electrical parameters
Data Source
AI summary
A method may include transmitting first test signals to electrical pathways of a connector-cable interface between a cable and a test circuit board in the absence of and in the presence of mechanical stress applied by a mechanical stressor to the connector-cable interface, performing vector network analysis measurements for one or more electrical parameters based on resultant signals from the electrical pathways resulting from the test signals in the absence of and in the presence of mechanical stress applied by the mechanical stressor to the connector-cable interface, transmitting one or more second test signals to electrical pathways of the connector-cable interface in the presence of mechanical stress applied by the mechanical stressor to the connector-cable interface, and based on differences between the vector network analysis measurements, determining whether or not the connector-cable interface has satisfied signal integrity requirements.