Oscilloscopes are probably the most usefulCONTROL ENGINEERING China版权所有, and most used general-purpose electronic test instruments. In the hands of a knowledgeable test engineer控制工程网版权所有, an oscilloscope can substitute for anything from a digital multimeter to a spectrum analyzer while easily performing measurements that are impossible for any other instrument. Couple an oscilloscope with a signal generator, and it is possible to measure virtually any electronic property of any electronic circuit within the circuit's frequency ba

　　10X scope probes provide imiproved measurement performance and safety.

　　While the scope has all this measurement flexibilityCONTROL ENGINEERING China版权所有, the information it provides is only as good as the signal reaching its input. The quality of that signal depends on how the signal gets from the unit under test (UUT) to the scope input. While it is possible to simply stick one end of a wire into the scope input connector and clip the other end to a test point on the UUT控制工程网版权所有, such informal procedures usually end in tears. Professional test engineers use test probes and, more often than not, use passive 10X oscilloscope probes more than anything else, as they are widely recognized as being the best bet for protecting the integrity of their measurements, their test equipment, and their skins. To understand why, it's important to know how these probes work.
　　Oscilloscopes are voltage-measuring machines. As suchCONTROL ENGINEERING China版权所有, they have high input impedances to minimize loading of the circuit being measured. Typical scope input impedances are on the order of 1 megohm. It's a nice value that is high enough to minimize loading of most circuits and low enough to avoid strange amplifier-noise effects.
　　A 10X scope probe takes advantage of this high-but-not-too-high scope input impedance to further reduce UUT loading while protecting the scope from overvoltages. We call this “decoupling.” Decoupling, in measurement circles, means reducing effects that the UUT and instrument have on each other.
　　The scope probe pu