公开(公告)号：US09696361B1

公开(公告)日：2017-07-04

申请号：US14566756

申请日：2014-12-11

Applicant: MARVELL INTERNATIONAL LTD.

Inventor： Junqing Sun ,  Danjin Wu ,  Hung Nguyen

IPC: G01R31/02 ,  G01R27/28 ,  G01N22/00

CPC classification number: G01N22/00 ,  G01R27/28 ,  G01R31/11

Abstract: Systems, methods, and other embodiments associated with testing a cable are described. According to one embodiment, an integrated circuit device includes a transmitter, a receiver, cable tester logic and a cable test control logic. The transmitter is configured to transmit signals to a cable. The receiver is configured to receive signals from the cable. The cable tester logic includes an echo tester configured to identify peaks corresponding to echo canceller coefficients that model an impulse response of reflected signals received by the receiver and a power-based cable tester configured to determine a power-based cable length based on an attenuation of a signal received from the link partner. The cable test control logic is configured to selectively activate one or both of the echo tester and the power-based tester and to determine a cable length based, at least in part, on the power-based cable length and the identified peaks.