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. [El Matador x333][eboot]1. Field of the Invention
This invention relates generally to the field of measurement systems. More particularly, the invention relates to an improved system and method for the calibration of a measurement system.
2. Description of the Related Art
The field of measurement, both in the scientific and industrial sectors, is characterized by increasing demands for systems that are capable of generating precise, highly accurate measurements. A wide range of measurement instruments exist, but all exhibit varying degrees of accuracy and precision. As such, there is an increasing demand for calibration techniques capable of calibrating measurements generated by these instruments to ensure that these instruments continue to generate reliable and accurate measurements.
Calibration techniques can be divided into two broad categories. The first category, which is referred to as implicit calibration, involves some form of specification or characterization of the system under test (“SUT”). In one example of implicit calibration, the system under test is characterized and/or calibrated by correlating the output of the system with a known input, such as a known input voltage.
Implicit calibration is often used with analog instruments, for example, oscilloscopes and spectrum analyzers. One example of implicit calibration is described in U.S. Pat. No. 5,294,824 (the “'824 patent”), which is incorporated herein by reference in its entirety.
The second category, which is referred to as explicit calibration, involves the use of a “calibrant,” or standard. The calibrant, or standard, is an instrument that is known to generate a particular range of measurements. The system under test is compared to the calibrant, and if the measurements of the system under test fall within the range of the calibrant, the system under test is deemed to be calibrated.
Explicit calibration is often used with digital instruments, for example, digital oscilloscopes and digital spectrum analyzers. One example of explicit calibration is described in U.S. Pat. No. 5,832,131 (the “'131 patent”), which is incorporated herein by reference in its entirety. The '131 patent describes a digital oscilloscope having a data gathering circuit coupled to an analog-to-digital converter, and an external be359ba680
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