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U1882B Folha de dados(PDF) 4 Page - Keysight Technologies |
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U1882B Folha de dados(HTML) 4 Page - Keysight Technologies |
4 / 11 page 04 | Keysight | U1881A and U1882B Measurement Application for InfiniiVision and Infiniium Oscilloscopes - Data Sheet A power measurement is simply a point-by-point multiplication of the voltage and current waveforms measured by the voltage and current probes. To make accurate power measurement and calculation, it is extremely important to equalize the time delay between the voltage and current probes using a procedure known as deskewing. This step is critically important since a small offset in the timing of the voltage and current traces can cause a large error in the instantaneous power reading. To deskew a pair of probes, drive both voltage and current probes with the same pulse signal using the U1880A deskew fixture. With only a single click on the menu, deskewing is automatically performed and its values are saved in the power measurement software, so the next time you launch the power measurement Figure 2. Deskew dialog Figure 3. Deskew fixture Auto deskewing and U1880A deskew fixture application, you can use the saved deskew values or perform the deskewing again. The deskew accuracy is a function of the electrical characteristics of the voltage and current probes as well as the risetime of the signal under test. In general, higher bandwidth probes will allow for better risetime fidelity and better deskew resolution. Keysight's N2790A to N2793A differential probes are recommended for most applications. The U1880A deskew fixture is recommended for use with the following voltage and current probe combinations given various test signal risetime characteristics. |
Nº de peça semelhante - U1882B |
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Descrição semelhante - U1882B |
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