What has three legs and eats RF?

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...and is able to read small differential voltages in the presence of 2kV common mode with complete isolation?

That'd be the new Tektronix TIVM series IsoVu probes. These offer a galvanically isolated measurement solution for accurately resolving high bandwidth, differential signals up to ±50 Vpk in the presence of large common mode voltages (up to 2kV) with the best in class common mode rejection performance across their bandwidth.  This is achieved by using a remote measurement head with interchangeable probes that is connected to the measurement system with a fibre-optic cable.  The fibre-optic cable carries control information and power to the sensor head, and data and signals back from the head to a controller.   The controller is connected to, and powered by, a scope with a TekVPI interface and itself provides power to the sensor head over the fibre using a laser.  It also converts the optical signals from the head to electrical ones for use by the scope with automatic scaling for different attenuators in the probe tip.  With measurement bandwidths from DC up to 1GHz there's nothing quite like it. 

Find out more using the links below

Links and Resources

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