| 摘要 |
A method of non-intrusive testing of a terminal resistor on a data bus includes inserting a signal onto the data bus adjacent one end thereof by magnetically coupling a signal generator to the data bus and producing a signal of known repetition rate and amplitude in the data bus. The reflection of the signal from the end of the data bus is observed electronically, and the amplitude and phase of the reflected signal, if any, is determined to indicate whether the terminal resistor is correctly sized or correctly installed.
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