One-man multifrequency transmission measurements

TO MAKE ONE-MAN multifrequency loss measurements, a special signal generator is required at the central office. The design principles of a dual-output automatic-cycling reference-level generator are discussed. Auxiliary equipment provides selection of different frequency groups, cycling through alternate test signals and terminations, and so forth. Two simple measuring sets developed for use with the multifrequency generator are described. Graphical plotting methods show sufficient correlation to make point-by-point measurements superfluous in most cases.