In this article, we will take a detailed look at the internal structure of USB 2.0 cables and the twist rate, a critical factor that plays a significant role within the cable.
USB 2.0 cables are not just simple wires; they are meticulously designed. Inside the cable are twisted signal lines for data transmission and separate lines for power delivery. The twisted signal lines are engineered to minimize electromagnetic interference, making them crucial for high-speed data transmission.
As shown in the image, the cable components include twisted pairs of 28 AWG data lines, 20-28 AWG conductors for power delivery, and shielding provided by braiding and foil. These elements work together to ensure stable data transmission and power supply.
The twist rate, in particular, is a key factor that significantly affects cable performance. The twist rate refers to how many twists occur within a specific length of the two data lines. A higher twist rate effectively blocks external electromagnetic interference. The standard twist rate specified by the USB IF is one twist per 60mm. Maintaining this value is essential for reducing signal interference and ensuring data transmission speed and stability.
As shown in the image, the cable thickness and measured twist rate were recorded as 56.37mm. This is close to the USB IF standard, indicating a high-quality cable. The twisted pairs and shielding structure inside the cable play a crucial role in maintaining transmission quality while minimizing external interference.
The shielding structure of the cable is also an essential factor. The combination of braid and foil shielding prevents electromagnetic interference, ensuring more stable and reliable data transmission. Without proper shielding, external signals can cause interference, leading to errors during data transmission.
In conclusion, the performance of a USB 2.0 cable is significantly influenced by its internal structure and design. The twist rate and shielding structure directly impact data transmission speed and stability, making it important to use cables that adhere to the standards set by the USB IF.
