The Paladin <b>77HP-G</b> Tone Generator is intended to identify the conductor within a bundle, at a crossconnect point, or at the remote end. This tester is housed in high impact plastic cases, and is powered by one 9 volt battery. Standard test leads include red and black rubber insulated test clips and a snag-proof, four-conductor modular cord and plug. (77HP-G/6A offers angled bed-of-nails clips.) A three-position toggle switch controls the modes of operation, and bi-colored Light Emitting Diodes (LEDs) display line polarity for Lines 1 and 2 (Line 1 only for 77M-G). When a short circuit is detected, an audible signal will be heard (77HP only). The tone and short circuit test functions are only applied to Line 1 using the modular plug.</p><p>The tone selector switch is located inside each unit and accessible from the outside using a slender tool and may be used to select a fast or slow warble tone output. The test sets are compatible with all common Central Office Switching Systems, and the output tone is isolated from DC voltages.</p>