| 摘要 |
PURPOSE:To check easily the propriety of error recovery by providing a data analysis means analyzing a transmission data sent from one communication terminal equipment and superposing noise only onto a designated transmission data in advance. CONSTITUTION:The transmission of a data is started from a communication terminal equipment 1a. Then the communication terminal equipment 1a sends a mode setting code SABM in succession to a flag F. The data SABM is received by a transmission/reception driving circuit 6 through a communication line 2 and transferred to a data analysis circuit 7. In receiving a data DATA 1 designated in advance, the circuit 7 starts a noise generator 8 to superimpose noise in the unit of character code or bit unit and sends the result to the line 2 via a transmission/reception driving circuit 6. During this time, all transmission/reception data are displayed on a display device 9.
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