Train communication network
First Claim
Patent Images
1. An access point for a communication network, comprising:
- a communications processor that receives signals from a different access point of the communication network;
at least a first attenuator that receives and selectively attenuates the signals before they are received by the communications processor;
a voltage clamp that receives and limits a strength of the signals before they are received by the at least a first attenuator; and
a second attenuator that receives and attenuates all signals before they are received by the voltage clamp.
6 Assignments
0 Petitions
Accused Products
Abstract
An access point for a communication network is disclosed. The access point may have a communications processor configured to receive signals from a different access point of the communication network, and at least a first attenuator configured to selectively attenuate the signals before they are received by the communications processor. The access point may also have a voltage clamp configured to limit a strength of the signals before they are received by the at least a first attenuator, and a second attenuator configured to attenuate all signals before they are received by the voltage clamp.
-
Citations
20 Claims
-
1. An access point for a communication network, comprising:
-
a communications processor that receives signals from a different access point of the communication network; at least a first attenuator that receives and selectively attenuates the signals before they are received by the communications processor; a voltage clamp that receives and limits a strength of the signals before they are received by the at least a first attenuator; and a second attenuator that receives and attenuates all signals before they are received by the voltage clamp. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A communication network, comprising:
-
a first access point having a first communications processor, at least a first attenuator, a first voltage clamp, and a second attenuator; a second access point having a second communications processor, at least a third attenuator, a second voltage clamp, and a fourth attenuator; and a cable connecting the first and second access points, wherein; the at least a first attenuator and the at least a third attenuator are connected to the cable at locations between the first and second communications processors; the first and second voltage clamps are connected to the cable at locations between the at least a first and at least a third attenuators; and the second and fourth attenuators are connected to the cable at locations between the at least a first and at least a third attenuators. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
-
-
20. A train consist, comprising:
-
a first locomotive; a second locomotive; a tender car; a first access point located on the first locomotive and being configured to control operations of the first locomotive; a second access point located on one of the second locomotive and the tender car and being configured to control operations of the one of the second locomotive and the tender car; and a cable connecting the first and second access points to communicate signals associated with coordinated control over operations of the first locomotive, the tender car, and/or the second locomotive, wherein each of the first and second access points includes; a communications processor configured to receive signals; an analog front end amplifier located to receive and selectively attenuate the signals before the signals are received by the communications processor; an adjustable attenuator located to receive and selectively attenuate the signals to about 3V before the signals are received by the analog front end amplifier; a gain controller configured to affect adjustment of the adjustable attenuator; a voltage clamp configured to selectively limit a strength of the signals to about 5V before the signals are received by the adjustable attenuator; and a passive attenuator configured to attenuate all signals by about ⅓
to ½
before the signals are received by the voltage clamp.
-
Specification