The ACDM Cable Identifier Receiver is an analog passive receiver for the  TPID transmitter. The kit includes an ACDM receiver and a Q110D current clamp. The unit is designed to show a needle deflection in response to a dc pulse on the line in the direction the pulse is moving. The display is a centered needle display with a red and green area on either side, a green deflection indicates pulse moving in the same direction as the red arrow on the CT and a red deflection means the pulse is moving in the opposite direction.