RF UUT Testing with Pre-computed Reference Signals
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Solution Overview
Problem
Radio frequency (RF) quality control measurements are time-intensive, particularly in large quantity production facilities, due to the complexity and repetitive nature of signal processing required to create and compare reference signals, which increases testing time and manufacturing costs.
Innovation Solution
A method utilizing a computer to perform tests on units under test (UUTs) by acquiring signals, retrieving and analyzing them with respect to stored reference signals, and synchronizing signal acquisition using markers like digital pulses or correlation methods, allowing for efficient characterization and storage of test results.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional signal processing methods are used to create and compare reference signals for RF measurements, then measurement precision is improved, but testing time increases substantially
Solution Approach 1:
The patent pre-calculates and stores reference signals and their corresponding metrics in a database before actual measurements are taken. During testing, the system retrieves pre-computed reference data and performs only necessary comparisons, eliminating the need to recreate reference signals from scratch for each measurement, thus significantly reducing testing time while maintaining precision.
Solution Approach 2:
The patent creates a database of pre-computed reference signals and metrics that can be copied and retrieved for multiple measurements. Instead of regenerating reference signals for each test, the system copies pre-computed reference data from the database, reducing processing time while preserving measurement accuracy.
2Manufacturing precision
If multiple measurements are performed repeatedly for each unit under test, then manufacturing precision is improved, but productivity decreases
Solution Approach 1:
The system pre-computes reference signals and metrics for multiple measurement scenarios and stores them in a database. During production testing, the system retrieves these pre-computed references and performs efficient comparisons, enabling multiple measurements to be conducted rapidly without regenerating reference data each time, thus improving both precision and productivity.
Solution Approach 2:
The patent implements a database system that stores pre-computed reference signals and metrics. Multiple measurements can copy this pre-computed reference data rather than regenerating it, allowing repeated measurements to be performed quickly and efficiently, thereby improving test throughput while maintaining manufacturing precision.
3Measurement precision
If complex signal processing functions are applied to remove distortions and create reference signals, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent performs complex signal processing functions to remove distortions and create reference signals in advance, before actual measurements are taken. The processed reference signals and their metrics are stored in a database. During testing, the system simply retrieves and compares pre-processed reference data, significantly reducing the complexity of real-time processing while maintaining measurement precision.
Solution Approach 2:
The system stores pre-processed reference signals and metrics in a database that can be copied and retrieved for multiple measurements. This approach moves the complex signal processing work to the pre-computation phase rather than the measurement phase, reducing device complexity during actual testing while preserving measurement precision through the use of pre-processed reference data.
Data Source
AI summary
Method and system for a test process. The method may include performing tests on one or more units under test (UUTs). At least one test on one or more UUTs may be performed. A signal may be acquired from the UUT. A reference signal may be retrieved. The reference signal may be derived from a transmitted signal characteristic of the UUT. The signal may be analyzed with respect to the reference signal. Results, useable to characterize the one or more UUTs, from performing the at least one test on the one or more UUTs may be stored. The reference signal may be derived from an initial test and may be stored for subsequent retrieval. A respective reference signal may be retrieved for all UUTs of the one or more UUTs for a respective test. The signal may be a radio frequency signal. The UUT may be a wireless mobile device.