Improved oscilloscope for measuring high voltage and fast slew-rate signals

19-11-2018 | Saelig | Test & Measurement

Saelig Company has improved their Cleverscope CS448 – a unique isolated high common-mode rejection ratio (CMRR) four-channel 200MHz 14-bit oscilloscope. The device has been created to measure high voltages - now up to 1600V - for fast slew-rate signals such as those in a full or three-phase power electronics switching bridge. Examples include voltage and charge of gate drives, power and spectrum of output signals for EMC compliance, loss and parasitic stress in power switching, control system signals for gain/phase and stability, etc. The device comprises an isolated 65MHz signal generator to give stimulus signals for frequency response analysis, and eight isolated 100Mb/s logic inputs to simultaneously measure control signals. Two devices can be connected to make an eight channel isolated oscilloscope with coherent sampling.

The device's very low noise design allows accurate measurements of small voltages during large swings. With input ranges of +/-0.8V and +/-8.0V, custom attenuation probes increase the measurement range up to 1600V. The application software automatically scales all values to offset for probe attenuation.

The device's combination of an optically-isolated, four-channel high dynamic range oscilloscope plus a signal generator is ideal for measuring power switching values, carrying out tradeoff analyses, and verifying the design and operation of power electronics circuits in machinery or electric vehicles. Connection to a Windows PC for display and operation with the provided application software is via USB or a galvanically or optically isolated Ethernet connection.

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