Patent ID: 7450633
Filing Date: 2008-11-11
Classification: G06F,H04L

Abstract:
1. A digital line tester comprising: a wander generator for generating a clock signal having wander which satisfies a defined time deviation characteristic; a transmission unit for sending a digital signal synchronized with the clock signal output from said wander generator to a digital line under testing; a reception unit for receiving the digital signal returned from said digital line under testing and restoring a clock signal of the received digital signal; an error measuring unit for measuring errors in the digital signal received by said reception unit; a time deviation measuring unit for measuring a time deviation characteristic of the clock signal restored by said reception unit; a display device; and display control means for displaying a result of measurements of said error measuring unit and the time deviation characteristic measured by said time deviation measuring unit on said display unit in such a manner that it can be compared with the defined time deviation characteristic, wherein said wander generator comprises: wherein said fluctuating signal sequence generator unit comprises: