The waveforms and the adjustable noise (with a variety of crest factors) make it easy to emulate real world conditions, in a controllable and repeatable way. Gaussian white noise is a good approximation to many real-world scenarios. The crest factor is an indicator of signal quality. The higher the crest factor is the more noise is used. If you conduct a jitter tolerance test of your receiver using a noise source with too low a crest factor, it could pass the test even if the device is substandard. The 1000Base-T standards require a BER of 10-10 or better. A crest factor of seven corresponds to a BER of 10-12. So switching between crest factors of 3.1, 4.8, 6 and 7 can help you identify problems quickly. The 81160A generates noise digitally, which makes it repeatable – although the noise remains random for the test, because it has a repeat period of over 20 days.
81160A 脉冲函数任意噪声发生器
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