Low Frequency Bandwidth, Noise and Droop
All measuring instruments are subject to limitations. The purpose of this technical note is to explain some of those limitations and to help the engineer maximise the many advantages of PEM’s CWT current probes based on Rogowski technology. This note defines the terms used to describe the low frequency performance of the CWT ranges of ac current probes and provides practical examples of measurements of low frequency bandwidth, noise, and droop. This document covers:
- Low Frequency (-3dB) Bandwidth
- Noise
- Droop
- Droop of a Single Pulse
- Droop and Offset Distortion for a Unipolar Pulse-train
Technical notes relating to CWT, CWTHF, CWTMini50HF, CWTMini, CWT Ultra-mini, CWTUM-S, CWTUM-F, CWTUMHF-F and CWTLF.
The purpose of these technical notes is to explain any limitations of the device and to also assist the engineer in maximizing the many advantages of the CWT, CWTHF, CWTMini50HF, CWTMini, CWT Ultra-mini, CWTUM-S, CWTUM-F, CWTUMHF-F and CWTLF.
We recommend that you use this instruction sheet in conjunction with the products short-form datasheets and instruction sheets.