Journal of Information Organization András Fehér and Szilvia Nagy 12 4 2022 https://doi.org/10.6025/jio/2022/12/4/81-88 https://www.dline.info/jio/fulltext/v12n4/jiov12n4_1.pdf During conducted measurements the reflection is one of the most varying components of the measurement uncertainty. For studying the distribution of voltage during cable reflections, in this paper we make a simple computational model and statistical analysis of the electric field to determine the distribution of uncertainty for the Voltage (Power) measurement. We also show, that the usually suggested U distribution does not always describe the behavior of the measured values, a beta-distribution is more proper for this purpose.