E-field probes used for measurement of worker exposure are usually calibrated in continuous wave (CW) conditions. For many types of probe, the response in realistic environments (modulated signals, multi-frequency and pulsed signals) differs from the response to CW conditions. However, to fully characterize a field probe in all possible environments would be an infinite task.In this paper we consider the effect of multiple CW signals and of several common communications formats on the indication given by a field probe with the objective of identifying simple tests which could act as a predictor of the performance alteration in non-CW environments.

A comparison of electric field measurements was carried out between January 2010 and July 2012 amongst fourteen national metrology laboratories at frequencies 1 GHz, 2.45 GHz, 10 GHz and 18 GHz at indicated field levels of 10 V/m, 30 V/m and 100 V/m. The identification of this intercomparison is CCEM.RF-K24.F. Two electric field probes provided by Amplifier Research have been measured as the travelling standards. The National Physical Laboratory (United Kingdom) acted as the pilot laboratory for the comparison. This report contains the results of the measurements.Main text. To reach the main text of this paper, click on Final Report. Note that this text is that which appears in Appendix B of the BIPM key comparison database kcdb.bipm.org/.The final report has been peer-reviewed and approved for publication by the CCEM, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).

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This paper summarises the results of GT-RF international key comparison CCEM.RF-K24.F for the measurement of E-fields at selected frequencies between 1 and 18 GHz at field strengths between 10 and 100 V/m with particular emphasis on dealing with the drift in one of the traveling standards. It is shown that, despite the drift, there was good agreement between the participants' results.