Test Group/Test |
SPEC/Requirement |
B-2-1:D+/D-Pair Attenuation |
≥−1.02 dB @ 50 MHz
≥−1.43 dB @100 MHz
≥−2.40 dB @200 MHz
≥−4.35 dB @400 MHz |
B-2-2:D+/D- Pair Differential Impedance |
75 ohms to 105 ohms |
B-2-3:D+/D- Pair Propagation Delay |
20 ns max |
B-2-4:D+/D- Intra-Pair Skew |
100 ps max |
B-2-15:Rp resistor verification |
56 kΩ ± 5% |
B-2-16 : D+ and D- DC Resistance |
3.5 ohms max. |
USB 2.0 High Speed 眼图测试