System and method for generating a jittered test signal

摘要

A multi-speed jittered signal generator ( 216, 400 ) that generates a full-speed jittered signal ( 404 ) by scaling a low-speed jittered signal ( 420 ) using a frequency scaler ( 428 ). The low-speed jittered signal is created by injecting a modulation signal ( 416 ) into a reference signal ( 412 ) using a jitter injector ( 432 ). Injecting jitter into a low-speed reference signal allows the full-speed jittered signal to be of higher quality than conventional jitter signals created by injecting jitter information into a full-speed reference signal. The multi-speed jittered signal generator may be used as part of a testing system ( 208 ) for testing various circuitry, such as high-speed serializer/deserializer circuitry ( 220 ).