USB 2.0
Pre-Compliance Physical Layer Testing USB2.0 一致性测试
4 Three categories of Compliance testing 0 Physical layer (Electrical Test) 0 Protocol layer 0 Interoperability testing 0 USB 2.0 legacy tests 0 Signal Quality Test 0 Droop & Drop Test 0 Inrush Current Test 0 HS Specific Tests 0 Chirp Test 0 Monotonic Test 0 Receiver sensitivity Test 0 Impedance Test (TDR)
USB2.0 信号质量测试 信号质量测试包括：
眼图测试(Eye-Diagram testing) 信号速率(Signal Rate)
包结尾宽度(End of Packet Width)
交叉点电压范围(Cross-over voltage range (for LS and FS)) JK抖动(JK jitter) KJ抖动(KJ jitter)
连续抖动(Consecutive jitter) 单调性测试(Monotonic test (for HS)) 上升与下降时间(Rise and Fall times)