Errors in the Calibrated Losses of Symmetrical Resistance Networks

Symmetrical resistive attenuating networks are usually designed to produce a definite calibrated transmission or insertion loss when working between given terminal resistances. When the terminations differ from the value assumed in the design, the transmission and insertion losses caused by the network will no longer be equal to each other nor to the calibrated loss, and this paper discusses the corrections that must be applied to obtain the true losses. Equations and curves are given from which the corrections may be obtained for cases of practical importance.