Systems and Methods for Predictive Radio-Frequency Testing of Electronic Devices
First Claim
1. A method of using a test system to perform pass-fail tests on devices under test to determine whether the devices under test perform satisfactorily, the method comprising:
- with the test system, evaluating device performance for the devices under test by measuring a plurality of performance metrics for the devices under test; and
with the test system, analyzing the plurality of performance metrics for the devices under test to predict which of the performance metrics are redundant for performing the pass-fail tests by determining which of the performance metrics exhibit probabilities of failure that are less than a predetermined threshold.
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Abstract
A test system may test the radio-frequency (RF) performance of wireless electronic devices under test (DUTs). The RF performance of the DUTs may be characterized by a set of performance metrics. The test system may obtain correlation information for each performance metric in the set of performance metrics. The correlation information may identify predictor performance metrics and associated dependent performance metrics in the set of performance metrics. The test system may gather measurement data from a selected DUT by measuring the predictor performance metrics on the selected DUT. The production test station may generate a conditional probability distribution for the dependent performance metric given the measurement data and the correlation information. The production test station may determine whether to omit testing of the dependent performance metric for the selected DUT by comparing an area under the conditional probability distribution for the dependent performance metric to a predetermined threshold.
10 Citations
24 Claims
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1. A method of using a test system to perform pass-fail tests on devices under test to determine whether the devices under test perform satisfactorily, the method comprising:
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with the test system, evaluating device performance for the devices under test by measuring a plurality of performance metrics for the devices under test; and with the test system, analyzing the plurality of performance metrics for the devices under test to predict which of the performance metrics are redundant for performing the pass-fail tests by determining which of the performance metrics exhibit probabilities of failure that are less than a predetermined threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of performing pass-fail testing on a plurality of wireless electronic devices under test using a test system having at least first and second test stations, the method comprising:
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with the first test station, gathering performance metric data from the plurality of wireless electronic devices under test by measuring a plurality of radio-frequency performance metrics for each wireless electronic device under test in the plurality of wireless electronic devices under test; with the second test station, gathering measurement data by measuring a subset of the plurality of radio-frequency performance metrics for a selected wireless electronic device under test; and with the second test station, determining whether to omit testing of a dependent radio-frequency performance metric in the plurality of radio-frequency performance metrics for the selected wireless electronic device under test based on the gathered measurement data and the gathered performance metric data. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of using a test system having at least first and second test stations to perform radio-frequency testing on a group of electronic devices under test, the method comprising:
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with the first test station, measuring a plurality of performance metrics on the group of electronic devices under test; with the first test station, obtaining correlation information that identifies a predictor performance metric and a dependent performance metric in the plurality of performance metrics, wherein the dependent performance metric correlates with the predictor performance metric; with the second test station, gathering measurement data from a selected electronic device under test for the identified predictor performance metric; and with the second test station, determining whether to skip testing of the dependent performance metric for the selected electronic device under test based on the correlation information and the gathered measurement data. - View Dependent Claims (20, 21, 22, 23, 24)
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Specification