| 摘要 |
PURPOSE:To generate an error similar to that in the state of error generation in the actual communication line by providing a means generating a period of error and length of error based on a parameter specifying the production of an error signal. CONSTITUTION:An arithmetic processing unit 1 supplies various parameters to generate an error signal such as kinds of error, bit error rate and error length to an error signal generator 2, in which a data having the period and length of an error selected optionally under a supplied bit error rate is generated, and an error signal of an optional length is generated for each error period decided based on the data and the result is fed to an error signal addition circuit 3. The addition circuit 3 adds an error signal to a digital data and supplies the result as the digital data added with an error. |
