Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Calibration
Patent
1995-07-17
1997-08-26
Brown, Glenn W.
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Calibration
324130, 36457101, G01R 3500
Patent
active
056614047
ABSTRACT:
A system and a method are presented which reduce the number of times of connection and disconnection of calibration standards in a circuit network measurement device provided with many measurement ports. The circuit network measurement device generally includes a network analyzer and a test set. A calibration port is provided and typically placed in the test set. The calibration port consists of a connector and three standards (open, short, and load impedances) connected to the connector internally by means of a selection switch. The measurement port of the circuit network measurement device is calibrated by using the three external impedance standards. The calibrator is calibrated by connecting the measurement port calibrated at the former step. Other measurement ports are then connected to the calibrator to be calibrated. Because the three impedances of the internal calibrator are automatically selected by a switch of the calibrator, by means of logical control, the number of times the standards are connected and disconnected is reduced.
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HP 4380S--RF Balanced Cable Evaluation Test System Product Overview--Mar. 1995--Hewlett-Packard Company, pp. 1-4.
HP 8753C--Network Analyzer Operating Manual--Jan. 1992--Hewlett-Packard Company, pp. 5-53 to 5-64.
Furukawa Tatsuo
Ishihara Atsushi
Iwai Hiroyuki
Yanagawa Koichi
Brown Glenn W.
Hewlett--Packard Company
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