Transmission Measuring Set Ts-559A/Ft, Ts-559/Ft and Noise Measuring Set Model 28 (Western Electric CO.)

摘要

The manual contains the information necessary for calibrating the TS-559/FT Transmission Measuring Set, the TS-559A/FT Transmission Measuring Set, or the Western Electric Company Model 2B Noise Measuring Set. The instrument being calibrated is herein referred to as the Test Instrument. This portable instrument, which is designed to measure, and visually indicate noise voltages in telephone circuits, can also be used to make transmission line measurements. By its use, noise magnitudes of 10 to 85 decibels below reference level at frequencies up to 10,000 cps can be measured. In addition, the Test Instrument can be used as a flat amplifier or as an oscillator. Six 22.5-volt batteries and two 1.5-volt batteries are required for operation of the Test Instrument.