Patent ID: 7808252

Claim:
A measurement apparatus for measuring a jitter transfer characteristic of a device under test, comprising: a signal creating section which creates a measurement signal including a combinational jitter obtained by combining a plurality of jitters having different frequency components from each other, and supplies the measurement signal to the device under test; and a measuring section which receives a response signal which the device under test outputs in response to the measurement signal, and measures a jitter transfer characteristic for the frequency component corresponding to each of the plurality of jitters, wherein the signal creating section includes a jitter applying section which applies the combinational jitter to measurement signal, the jitter applying section including: a signal transmission path that transmits the measurement signal from an input terminal to an output terminal; a jitter control section that outputs a jitter control voltage corresponding to each of the plurality of jitters to be superimposed on the measurement signal; a variable capacitance diode that is provided between a connection node on the signal transmission path and the jitter control section, and whose capacitance changes according to the jitter control voltage output from the jitter control section; a buffer circuit that is connected in series on the signal transmission path closer to the input terminal than the connection node is, the buffer circuit receiving the measurement signal and outputting a voltage in response to the received measurement signal; and a serial resistor that is connected in series between the buffer circuit and the connection node on the signal transmission path.