Back to results
US 7,026,807 B2Granted
Power measurement system
AssigneeAgilent Technologies, Inc.
InventorsAlan Anderson, Eric Breakenridge
Life of this patent
Estimating the term…
Abstract
A power meter is provided in which calibration is carried out as an automated procedure controlled by the meter.
Claims10
A power measurement system for measuring power of an electromagnetic signal, the system comprising:
- a measuring unit for translating an electrical signal originating from a sensor into a power measurement;
- a sensor unit comprising the sensor and an amplification circuit;
- a cable for coupling the measuring unit to the sensor unit, the sensor unit and the cable defining a path for communicating the electrical signal originating from the sensor to the measuring unit;
- and
- a reference source that generates a reference signal arranged to be selectively coupled to the amplification circuit in at least one of the following configurations:
- coupled to the amplification circuit in place of the sensor;
- and
- coupled to the amplification circuit in addition to the sensor to provide a stimulus to the sensor via the amplification circuit.
5 more elements
A sensor unit apparatus for a power measurement system, the apparatus comprising:
- a sensor;
- an amplification circuit coupled to the sensor;
- and
- a reference source that generates a reference signal arranged to be selectively coupled to the amplification circuit for communicating the reference signal to a measuring unit via a cable in at least one of the following configurations:
- coupled to the amplification circuit in place of the sensor;
- and
- coupled to the amplification circuit in addition to the sensor to provide a stimulus to the sensor via the amplification circuit.
4 more elements
A method of maintaining accuracy of a power measurement system comprising a sensor unit coupled to a meter unit by a cable, the method comprising the steps of:
- generating a test signal;
- receiving the test signal at the meter unit via a path defined by the sensor unit, the cable and the meter unit;
- and
- calibrating the meter unit in response to the test signal;
- the test signal being a reference signal that is arranged to be selectively coupled in at least one of the following configurations:
- coupled into the path in place of the sensor;
- and
- coupled into the path in addition to the sensor to provide a stimulus to the sensor via an amplification circuit.
5 more elements
Dependencies are inferred from the claim text.