Patchcord length measurement for LAN testers

Details Patchcord length measurement for LAN testers Patchcord length measurement for LAN testers

2006-02-14

2006-02-14

Deb, Anjan K. (Department: 2858)

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

Of individual circuit component or element

C324S539000, C324S644000

Reexamination Certificate

active

06998853

ABSTRACT:
A LAN tester has display and remote units each having a connector jack attached to an adapter board for connection to the plug of a patch cord. Both the display and remote units have circuits which are capable of measuring the phase between a drive signal voltage and the corresponding coupled or reflected signal due to the drive signal. Scattering parameters for the mated connector pairs and the patch cord itself are measured during a field calibration. A computer in one or both of the tester units stores the measured scattering parameters and uses the scattering parameters to move the reference plane to any desired location along the patch cord. The length of the patch cord can be determined through the use of phase by measuring the frequency difference between adjacent maxima of a plot of input impedance versus frequency.

REFERENCES:
patent: 5570029 (1996-10-01), Bottman et al.
patent: 5821760 (1998-10-01), Koeman et al.
patent: 6847213 (2005-01-01), Renken et al.
patent: 2003/0222654 (2003-12-01), Furse et al.

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