| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To correctly and automatically measure the jitter tolerance of an object to be measured even if a specific error condition occurs. <P>SOLUTION: A jitter generating part 11 creates a data signal D provided with jitter and inputs it to the object to be measured 1. An error measuring device 12 measures an error rate of the data signal D' outputted from the object to be measured 1. A jitter tolerance detecting part 13 increases or reduces the amount of jitter of the jitter generating part 11 to be provided for the data signal D within a preset width of change according to the results of measurement of the error measuring device 12 and determines the maximum amount of jitter of which the error rate is less than a predetermined value as a jitter tolerance value of the object to be measured 1. A specific error determining means 21 determines whether the object to be measured 1 is in the specific error condition or not every time the the jitter tolerance detecting part 13 changes the amount of jitter. The error measurement restricting means 23 halts measuring operation of the error measuring device while the object to be measured 1 is in the specific error condition. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
