Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Calibration
Patent
1996-08-19
2000-05-23
Ballato, Josie
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Calibration
324763, G01N 2200
Patent
active
060669535
ABSTRACT:
An RF module useful for configuring RF sources and receivers to make a wide range of measurements on a device under test. The module includes a directional element which allows one receiver to measure both the input and the output signals from one test point. In addition, the module allows multiple input signals to be combined for intermodulation testing. Multiple copies of the module are used to construct multiple channels in an RF tester. At least one RF source and one RF receiver can be connected to each channel. Each lead of a device under test is assigned to a channel, but one channel may be multiplexed to more than one lead. Switching circuitry included in each module allows the source from one channel to be used as an intermodulation signal for another channel. The module includes calibration standards for source and receiver level accuracy. With this arrangement, numerous RF measurements, including measurement of s-parameters, can be made on a device under test without dedicated instruments.
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Ballato Josie
Sundaram T. R.
Teradyne, Inc.
Walsh Edmund J.
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