| 摘要 |
A test has been developed that is known as the transmitter waveform dispersion penalty (TWDP) test. The TWDP test has been used to test and certify various optical data transmission devices. Similar tests are being developed to test optical receivers such as a difference waveform distortion penalty (dWDP). A test pattern used to generate the transmitted sequence by the device under test is a PRBS9. The PRBS9 test pattern begins with a run of nine ones and has a length of 511 bits. According to the teachings herein, a test pattern of less than 511 bits is generated to perform the TWDP and dWDP tests. The test pattern may include a sequence of bits specifically designed to provide reliable test penalty calculation without the costly and time consuming aspects of the conventional TWDP and dWDP tests using the PRBS9 pattern.
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