sponsoredPOWER ANALYZERS Seamless auto-range for high dynamic power analysis

Sponsored by

DEWETRON GmbH

Power analyzers typically offer a wide array of measurement ranges, each tailored to improve accuracy within its specific range. Generally, for selecting the optimal range, an auto-ranging algorithm is used. However, the switching between different ranges isn't instantaneous and results in measurement gaps. To meet the requirements of today's dynamic load analysis, an alternative approach is required. DEWETRON’s SUB-XV module offers this innovative technology.

DEWETRON’s SUB-XV module for high dynamic power analysis enables gapless voltage measurements over multiple measurement ranges. This innovative technology combines the major benefits of the classical multi-range power analysis with the single range approach. Measurements from 1 to 1000V and 1mA to 1A are possible without typical auto-range gaps in the signal, together with best-in-class accuracy.

Current state of the art

Power analyzers typically offer a wide array of measurement ranges, each tailored to improve accuracy within its specific range. Generally, an auto-ranging algorithm is used to automatically select the optimal range for the measurement value. However, this presents a challenge as range switching isn't instantaneous, resulting in measurement gaps, making it only suitable for quasi-static tests.

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To meet the requirements of today's dynamic load analysis, an alternative approach is required. One such approach is to use a single-range input that eliminates gaps in the measurements. However, this method has its drawbacks. In a narrow range, the maximum input signal is severely limited and will be clipped if it exceeds the range, even though it offers a higher resolution. On the other hand, in a wide range, the instrument may lack the precision required for accurate readings of small input signals.

Solution: DEWETRONs seamless auto-range technology

One solution to these problems is DEWETRON's "seamless auto-range" technology. The result is a multi-range input without multiplexing or physical switching. This means that it combines the advantages of the classic multi-range approach and the single-range approach.

Depending in the input type, two to four physical measurement ranges per input channel acquire the measurement data in simultaneously. This means that each physical input generates up to four data streams, one for each range. These data streams are then combined by fading the sampled data of the active channel from one range into the next range. This is all done in the onboard DSP at mega-sample speed. Furthermore, this cutting-edge technology automatically compensates for any DC-offsets in the higher ranges, surpassing the auto-zero function applied during traditional range switching. Overall, this technology enables gapless voltage measurements within an input range of 1 to 1000 V.

Experience this great innovation and get in touch with us: www.dewetron.com

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