Identifying and synchronizing permuted channels in a...

Details Identifying and synchronizing permuted channels in a... Identifying and synchronizing permuted channels in a...

2005-11-01

2005-11-01

Pham, Chi (Department: 2667)

Multiplex communications

Diagnostic testing

Determination of communication parameters

Reexamination Certificate

active

06961317

ABSTRACT:
A test system that includes a generator and an analyzer acting cooperatively to test a device having a plurality of device communication channels. The device has a plurality of inputs and corresponding outputs, each input being connected to a corresponding one of the outputs. The correspondence between the input and output channels may change if the device is turned off and on or if the device is not actively sending data from the inputs to the outputs. The test system determines a mapping between the device inputs and outputs prior to performing bit error rate testing utilizing a mapping test pattern. The test system can then switch to a bit error rate test pattern without causing the device to drift such that the correspondence between the input and output channels is lost.

REFERENCES:
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patent: 6498833 (2002-12-01), Sugino et al.
patent: 2001 127729 (2001-05-01), None
Signalwiggard: all-channel testing technology (SONET), Agilent, Online, May 1, 2001.

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