601 AM Fixed Sampling Loop Product Brochure

Sampling Loops are used to properly tune and maintain AM directional antenna arrays. The ERI sampling loop provides an accurate means to sample radio frequency energy in towers of a directional AM antenna array. The 601 Series sampling loops provide individual tower current samples for an antenna phase monitor, in directional AM antenna arrays. Sampling loops are always used to provide the required samples in towers of 110-degrees and taller they may also be used in shorter towers and may provide a more accurate sample for the antenna monitor. Tower mounted sampling loops have an advantage over base current transformers in that the sample includes not only the tower current but also other currents flowing to ground from stray capacitances in the tower base region due to the installation of lighting chokes, ring transformers, and/ or isolation transformers. Tower mounted loops provide a sample of the tower current only and are unaffected when changes or additions are made to components that cross the tower base insulator.