The pulse transmitter produces rectangular wave shape pulses 830 ms wide (see waveshape on back). A sequence of these pulses is available at three output terminals, labeled PHASE “A”, PHASE “B” and PHASE “C”. At the “A” phase output, one pulse is produced approximately every four seconds. At the “B” phase output, two pulses are produced approximately every four seconds synchronized with “A”phase so that the sum of “A” and “B” phase pulses are collected on “C” phase and returned to the transmitter. This sequence is transmitted repetitively.

The pick-up coil supplied with the system is used to identify the cable of interest by the deflection of the meter.Each phase conductor can be located by observing the selective pulses of the meter as the pick-up coil is moved around the circumference of the cable.

The single pulse (“A” Phase), dual pulse (“B” Phase) sequence is transmitted repetitively under normal conditions. An intermittent mode is also included so that the “A” Phase (single pulse) is transmitted for one minute, and then the “B” Phase signal (dual pulse) is transmitted. This gives the operator a longer period of time to identify the signals and is very useful when tracing long lengths of cables or working in electrically noisy environments.