Patent ID: 7890830

Claim:
A test signal generating apparatus comprising: a test signal generating unit for generating a test signal; a pattern storage unit having patterns to be selected for said test signal; a pattern map storage unit having a pattern map defining the number of repetitions for each pattern and a pattern corresponding to a test signal to be generated by said test signal generating unit after said test signal generating unit repeats said test signal on the basis of said number of repetitions; and a pattern selecting unit for selecting, from among said patterns stored in the pattern storage unit, a pattern corresponding to the test signal to be generated by said test signal generating unit, wherein said test signal generating apparatus further comprises a trigger signal receiving unit for receiving at least one trigger signal, said pattern map defines a pattern corresponding to said trigger signal, when said trigger signal is received by said trigger signal receiving unit under the condition that said test signal generating unit is repeatedly generating a test signal having a pattern selected by said pattern selecting unit on the basis of said number of repetitions defined by said pattern map, said pattern selecting unit selects a pattern corresponding to said trigger signal received by said trigger signal receiving unit on the basis of said pattern map.