USB hub, we often say USB HUB, can expand the USB interface of the computer into multiple USB interfaces, so as to solve the problem that the USB interface of the user’s computer is not enough and the interface is convenient to plug and unplug.
How to measure a good HUB standard? The word “good” contains multiple meanings. A good USB HUB is an excellent product, which needs to be comprehensively evaluated in terms of quality, ease of use, and brand.
Combined with the experience of buying hubs, today we will talk about what characteristics a qualified USB HUB needs to have?
1. Number of interfaces
At present, 4-port USB HUBs are widely used, and there are also 7-port HUBs with as many as a dozen ports. Of course, this type of HUB is mainly used in work scenarios that require comparison, verification and batch processing. It is worth mentioning that the multi-interface USB HUB generally has a power supply, which has obvious advantages in power supply and can drive more devices with higher power requirements.
2. External power supply
First, it is necessary to understand this attempt. A USB interface can provide 500mA of current. A HUB without an external power supply can only distribute a limited 500mA current to each expansion interface. The HUB with external power supply does not have this limitation, and can provide sufficient power for each interface according to the usage, which is of great help to devices with high power supply requirements such as USB mobile hard disks.
It should be known that insufficient power supply will cause the device to be unable to read data, and in severe cases, it will lead to data recording errors, hard disk damage, and scrapping.
3. Transmission speed
The problem of hub transfer speed is not absolute. In addition to the theoretical value, cable length, power supply method and compatibility between USB, it will also affect the problem of transmitting signals. The theoretical maximum transfer speed of USB2.0 is 480Mbps, while the theoretical speed of USB3.0 can reach 5Gbps. Generally speaking, the charging/transfer speed of USB3.0 is nearly ten times faster than that of USB2.0.
But if you are using a 2.0 U disk, then connecting to the USB3.0 interface can only reach the 2.0 transmission speed, and the version of the U disk is limited.
4. Reasonable interface layout
The excellent USB HUB is very user-friendly in design, taking into account all aspects of users. For example, the location of the expansion interface provided by the USB HUB is very important. Once a poorly positioned USB port is inserted into a device, it may block other USB devices, resulting in a waste of ports. (Think of those anti-human socket designs)
Generally, the position of the USB HUB interface of the star-shaped open design is very good, and there will be no conflicts. The superior brand takes this into consideration, so it incorporates this concept into the research and development design. This is not the case with some of the premium products on the market.
5. Reasonable lighting tips
In order to identify the working status of each device on the USB HUB, many USB HUBs provide LED lights to display the working status. Generally speaking, a long light indicates that the USB device is connecting steadily, and a blinking indicates that the USB device is transferring data.
This prompt effect is very useful. It is worth noting that the lighting effects of some USB HUBs are too obvious, which can easily cause light pollution. Therefore, reasonable lighting prompts are the key, and the lighting should be soft and not dazzling.
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