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US 12,712,593 B2Granted
Transmission line diagnostics
AssigneeAnalog Devices International Unlimited Company
InventorHector Enmanuel Alberti Arroyo
Life of this patent
Estimating the term…
Abstract
There is provided a method of a method for characterising a cable or transmission line, the method comprising: obtaining a first echo response using time domain reflectometry; coupling a first end of the cable or transmission line to a time domain reflectometer; obtaining a second echo response using time domain reflectometry; determining a characteristic of the cable or transmission line by comparing the first echo response and the second echo response.
Claims32
A method for characterising a cable or transmission line, the method comprising:
- obtaining a first echo response using time domain reflectometry;
- coupling a first end of the cable or transmission line to a time domain reflectometer and terminating a second end of the cable or transmission line using a load;
- obtaining a second echo response using time domain reflectometry;
- and
- determining a characteristic of the cable or transmission line by comparing the first echo response and the second echo response, wherein the characteristic of the cable or transmission line comprises a return loss of the cable or transmission line, and wherein determining the return loss comprises:
- determining a ratio of a fast Fourier transform of the first echo response to a fast Fourier transform of the second echo response to determine a reflection coefficient of the cable or transmission line.
3 more elements
A method for characterising a cable or transmission line, the method comprising:
- obtaining a first echo response using time domain reflectometry;
- coupling a first end of the cable or transmission line to a time domain reflectometer and terminating a second end of the cable or transmission line using a load;
- obtaining a second echo response using time domain reflectometry;
- and
- determining a characteristic of the cable or transmission line by comparing the first echo response and the second echo response, wherein the characteristic of the cable or transmission line comprises an impedance of the cable or transmission line, and wherein determining the impedance of the cable or transmission line comprises:
- determining a ratio of a fast Fourier transform of the first echo response to a fast Fourier transform of the second echo response to determine a reflection coefficient of the cable or transmission line;
- and
- determining a ratio of the reflection coefficient of the cable or transmission line.
5 more elements
A method for characterising a cable or transmission line, the method comprising:
- obtaining a first echo response using time domain reflectometry;
- coupling a first end of the cable or transmission line to a time domain reflectometer;
- obtaining a second echo response using time domain reflectometry while the second end of the cable or transmission line is at least one of open-circuited or short-circuited;
- and
- determining a characteristic of the cable or transmission line by comparing the first echo response and the second echo response.
2 more elements
A method for characterising a cable or transmission line, the method comprising:
- obtaining a first echo response using time domain reflectometry;
- coupling a first end of the cable or transmission line to a time domain reflectometer;
- obtaining a second echo response using time domain reflectometry;
- and
- selecting a predetermined set of samples within the second echo response and a corresponding predetermined set of samples within the first echo response for comparison;
- determining a characteristic of the cable or transmission line by comparing the predetermined set of samples within the first echo response and the predetermined set of samples within the second echo response.
3 more elements
A method for characterising a cable or transmission line, the method comprising:
- obtaining a first echo response using time domain reflectometry;
- coupling a first end of the cable or transmission line to a time domain reflectometer;
- obtaining a second echo response using time domain reflectometry;
- and
- determining a characteristic of the cable or transmission line by comparing the first echo response and the second echo response;
- comparing the determined characteristic of the cable or transmission line to a cable standard or communications standard comprising cable definitions;
- and
- determining whether the cable or transmission line is compliant with the cable standard or communications standard.
5 more elements
A method for characterising a cable or transmission line, the method comprising:
- obtaining a first echo response using time domain reflectometry;
- coupling a first end of the cable or transmission line to a time domain reflectometer;
- obtaining a second echo response using time domain reflectometry;
- and
- determining a characteristic of the cable or transmission line by comparing the first echo response and the second echo response;
- determining a second characteristic of the cable or transmission line;
- and
- determining degradation of the cable characteristics by comparing the second characteristic of the cable or transmission line to the characteristic of the cable or transmission line.
5 more elements
A method for characterising a cable or transmission line, the method comprising:
- obtaining a first echo response using time domain reflectometry from a first end of a cable or transmission line using a first time domain reflectometer whilst a second end of the cable is coupled to a second time domain reflectometer;
- obtaining a second echo response using time domain reflectometry from the second end of the cable or transmission line whilst the first end of the cable or transmission line is coupled to the first time domain reflectometer;
- identifying a first complete reflection in the first echo response, the first reflection corresponding to an impedance mismatch between the first time domain reflectometer and the cable or transmission line;
- identifying a second complete reflection in the second echo response, the second complete reflection corresponding to an impedance mismatch between the cable or transmission line and the first time domain reflectometer coupled at the first end of the cable;
- determining a ratio of a fast Fourier transform of the first complete reflection within the first echo response to a fast Fourier transform of the second complete reflection within the second echo response;
- and
- taking a logarithm of the ratio and multiplying by ½ to determine an insertion loss of the cable in decibels.
4 more elements
A method for characterising a cable or transmission line, the method comprising:
- obtaining a first echo response of a time domain reflectometer using time domain reflectometry;
- coupling a first end of the cable or transmission line to a time domain reflectometer;
- obtaining a second echo response of the cable or transmission line using time domain reflectometry;
- and
- determining a return loss of the cable or transmission line by comparing the first echo response and the second echo response.
2 more elements
Dependencies are inferred from the claim text.