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US 11,637,587 B2Granted
In situ common-mode noise measurement in high-speed data communication interfaces
AssigneeDell Products L.P.
InventorsArun Chada, ChunLin Liao, Bhyrav Mutnury
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Abstract
An information handling system includes a transmitter that transmits data over a channel to a receiver. The transmitter operates to transmit a test sequence including a repeating sequence of a number of logic 1's and the number of logic 0's. The receiver operates to detect noise injected onto the channel based upon an output from a data eye sampler in response to the test sequence.
Claims20
An information handling system, comprising:
- a transmitter configured to transmit data over a channel;
- and
- a receiver configured to receive the transmitted data from the channel, the receiver including a data sampler and an eye sampler;
- wherein the transmitter operates in a normal operating mode to transmit user data and in a test mode to transmit a test sequence including a sequence of a number (N) of consecutive logic 1's and the number (N) of consecutive logic 0's, the sequence being transmitted repeatedly, thereby lowering an apparent frequency of the test sequence to minimize channel loss, reflections, crosstalk, and inter-symbol interference in the test sequence;
- and
- wherein the receiver operates in the normal operating mode to receive the user data with the data sampler, and in the test mode to detect noise injected onto the channel based upon an output from the data eye sampler in response to the test sequence with the eye sampler.
3 more elements
A method, comprising:
- transmitting, in a test mode, by a transmitter of an information handling system, a test sequence including a sequence of a number (N) of consecutive logic 1's and the number (N) of consecutive logic 0's over a channel, the sequence being transmitted repeatedly, thereby lowering an apparent frequency of the test sequence to minimize channel loss, reflections, crosstalk, and inter-symbol interference in the test sequence;
- receiving, in the test mode by the receiver, the test sequence;
- providing, in the test mode, the test sequence to a eye sampler of the receiver;
- and
- detecting, by the eye sampler, noise injected onto the channel based upon an output from the data eye sampler in response to the test sequence;
- transmitting, in a normal operating mode, by the transmitter, user data;
- receiving, in the normal operating mode by the receiver, the user data;
- and
- providing, in the normal operating mode, the user data to a data sampler of the receiver.
6 more elements
An information handling system, comprising:
- a receiver configured to receive data from a transmitter over a channel, the receiver including a data sampler and an eye sampler, wherein the transmitter operates in a noise test mode to transmit a test sequence including a sequence of a number (N) of consecutive logic 1's and the number (N) of consecutive logic 0's, the sequence being transmitted repeatedly, thereby lowering an apparent frequency of the test sequence to minimize channel loss, reflections, crosstalk, and inter-symbol interference in the test sequence, wherein the receiver operates in the noise test mode to detect noise injected onto the channel based upon an output from the data eye sampler in response to the test sequence, wherein the transmitter operates in a normal operating mode to transmit user data, and wherein the receiver operates in the normal operating mode to provide the user data to the data sampler;
- and
- a management engine configured to set the transmitter and the receiver into the noise test mode.
Dependencies are inferred from the claim text.