Excavating
Patent
1997-09-04
1998-09-22
Chung, Phung M.
Excavating
371 55, 370252, 370317, 370318, 375254, G06F 1100
Patent
active
058125574
ABSTRACT:
A power line communications analyzer (PLCA) provides a signal strength metering system and selectable signal attenuation functions for adjusting the transmitting unit's attenuation and measuring error rate without the need for a user to be present at both the sending and receiving locations under test. Each PLCA is coupled to a power line communication network via an electrical outlet and power lines. In actual operation, one of the PLCAs acts as a data transmitter and the other PLCA acts as a data receiver. The mode of operation of the PLCA can be dynamically altered during operation of the system. The PLCA comprises control logic that receives command inputs from a keypad, generates data packets for transmission on the power line communication network, receives and analyzes data packets received from the power line communication network, detects the power line signal and/or noise level and drives the LED display accordingly, and displays packet transmission information on an LCD display.
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Andrus Marie E.
Hurlbut Amy O.
Riley Glen M.
Stewart J. Marcus
Sutterlin Philip H.
Chung Phung M.
Echelon Corporation
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