... locate those under ground telecom lines, fibers, Our optical & cable locators scan the ground and use radio frequency ... 98 lbs.)ReceiverFrequenciesTrace modeTone modeActive: 577 Hz, 8 kHz, 33 kHz, 133 kHzPassive: Power -50/60 Hz, user ... fault modeTone modeInduction mode 577 Hz, 8 kHz, 33 kHz, 133 kHz4/8 Hz for sheath fault; ... 577 Hz and 33 kHz for tracing577 Hz and 133 kHz pulsed ...