Patent ID: 8299805

Claim:
An evaluation device provided between an output device and a device to be evaluated, when an output from the output device input to the device to be evaluated, evaluating whether or not a required output from the device to be evaluated based on the output is made, The evaluation device comprising: a first amplifier to amplify the output from the output device, a second amplifier to amplify the output from the device to be evaluated, one or two or more circuit elements to attenuate respectively the output amplified by the each amplifier wherein, the circuit elements comprising: a pair of transmission lines for evaluation, capacitances which are placed between the transmission lines, and several resistances which are directly connected to at least one of the transmission lines for evaluation, wherein, values of the capacitances and values of the resistances are decided based on a pair of actual transmission lines connecting between the amplifiers and the device to be evaluated, or a transmission speed of the output passing through the transmission line.