| 摘要 |
A method for injecting an error into a waveform sent over a data link includes the following: The data link is monitored for a control event such as a symbol in the waveform. In response to the control event, a control signal is generated. In response to the control signal, the waveform is distorted, thereby injecting an error into it. The method can be applied in a number of ways. For example, different control events can be chosen, including fill words, start-of-frame or end-of-frame delimiters, or other recognizable portions of a waveform whether before or after the data field. The distortion applied to the waveform can take the form of amplitude or frequency distortion, or both. The method is applicable to electrical, optical, or other types of signals. Selected parts of a waveform can be distorted by introducing delay into the method, such as delay in generating the control signal, delay in generating the distortion, or delay in transmitting the waveform. The distorted waveform may also be viewed and captured for later analysis and comparison with an undistorted waveform. The methods of the invention can be implemented in an number of ways, such as in an error injector that is coupled into a data link within the system under test.
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