The Pro871 Underground Cable Locator is a value-priced underground locator for contractors and maintenance personnel. Incorporating 5 different tracking modes (2 direct connect, 2 inductive, 1 passive), the Pro871C tracks many types of cabling — including CATV, electrical, telephone, dog fencing and landscape lighting, using either null or peak reception modes.
The Pro871 also has the option of NULL or PEAK tracing. Simply put, NULL means that the signal nulls or stops when the receiver is directly over the cable. PEAK means the signal is loudest directly over the cable. The user should become familiar with this difference and select the response that best suits their preference.