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N2809A bảng dữ liệu(PDF) 5 Page - Keysight Technologies |
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5 / 11 page 05 | Keysight | PrecisionProbe for Bandwidths up to 33 GHz - Data Sheet Vout/Vsource Correction The second way to correct probes is an estimate known as Vout/Vsource, this method corrects the probe as “what would be there if the probe were not present.” There are oscilloscope and probe manufacturers that design their probes and DSP correction software to display what the waveform “would have been” in the absence of the probe. One drawback of defining the probe’s response in this manner is that if the probe’s loading causes your circuit to lose some timing or amplitude margin, you probably want to know that when you make a measurement. Vout/Vsource compensation will hide these effects from you. Precision- Probe also gives you the freedom to choose this method of correction, which can be effective if probing at the transmitter. Vout/Vin Correction Vout/Vin characterizes the output of the probe as a func- tion of the input at the probe tips. Defining the response this way allows you to evaluate the probe’s accuracy in reproducing the actual signal present in your system with the probe attached. This correction is known as Vout/Vin, which is what you’d see with a real band limited probe that has finite input impedance. PrecisionProbe corrects the “Vout/Vin” response to be flat with frequency and phase to your defined bandwidth limit. It does not correct the loading effects of the probe. It should be noted that Keysight’ s probe frequency response corrections are typically defined using Vout/Vin. Figure 6: A probe that has perfect transfer function shows an exact copy of a signal at the input. A probe that has a perfect system re- sponse shows the signal at the input of probe boosted by the estimate amount of loading due to the probe. PrecisionProbe Correction Two methods exist for correcting probe responses, Vout/Vin and Vout/Vsource |
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Mô tả tương tự - N2809A |
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