Patent ID: 7961629

Claim:
A test apparatus for testing a device under test including a receiving circuit for receiving signals transmitted through a communication cable, comprising: a waveform generating section for outputting waveform data, which includes a frequency component attenuated according to an attenuation characteristic of the communication cable, to define a waveform to be provided to an input terminal of the receiving circuit; a digital filter having a filter characteristic substantially reverse to the attenuation characteristic of the communication cable, for outputting amplified waveform data having a substantially flat frequency characteristic, in which a least number of bits required for indicating the waveform is smaller than a number of bits of the waveform data output from the waveform generating section, obtained by boosting the attenuated frequency component of the waveform data; a DA converter for converting the amplified waveform data to an analog waveform; and a low-pass filter having an attenuation characteristic substantially same as that of the communication cable, for attenuating the analog waveform and providing the same to the receiving circuit.