Scope Probes With Attitude

摘要

A scope probe is the first level of signal conditioning in a measurement system. Obviously, probes are used with scopes but not always. As Rebecca Suemnicht, senior product manager for digitizers at National Instruments (NI), explained, "Automated test environments such as design validation and production test now face the same challenges that the design space encountered many years ago in unobtrusively measuring signals with frequencies beyond 1 GHz.rn"Some users of modular digitizers connect to signals via active probes," Ms. Suemnicht said. "For example, an AC characterization test station for high-performance logic devices was developed using the NI PXI-5154 1 -GHz Digitizer with Tektronix P6245 1.5-GHz Active Probes. This solution allowed all channels of the device under test to be measured without the loading that coaxial cables would have."