Circuit design of the N3 carrier terminal

In the circuit design of the N3 carrier terminal full use has been made of the advances in solid state art, crystal filter design techniques, and miniature ferrite transformer performance. Economies have been provided in power consumption, space requirements, and maintenance effort. Performance has been significantly improved over its predecessor the ON2 terminal in the areas of channel response, net loss stability, compandor tracking, and modulation distortion. Two concepts, new to the short-haul carrier field, have been employed in the N3 design. Frequency correction circuits are used to precisely correct for frequency shifts accumulated as the signal is transmitted over the N-repeatered line. A common carrier supply is utilized to provide extremely precise carriers economically for terminal use.