USB stands for the term Universal Serial Bus. In earlier years USB was designed to be the standard for the computer peripherals such as your keyboards, pointing devices and network adapters.
The American Society for Testing and Materials International along side with International Organization for Standardization sets standards that are used internationally to improve product quality worldwide. A few of these ASTM USB inspection tests include:
Full and Low Speed Electrical Compliance Inspection
The full and low speed electrical compliance inspection is used to evaluate USB peripherals, accessories, and other plug and play devices by putting them though a series of electrical tests. The USB should undergo several electrical tests including the signal quality for droop and drop using a Signal Quality Droop Drop Board. This board is also used for testing the inrush of power, and its’ ability to hold electric current.
Interoperability Inspection
The Interoperability inspection test is used to prepare host systems for operation of the USB device/accessories. Quality control specialists will plug the device into a computer with an operating software such as Windows 2000 Professional and ensure the USB device does not display a notification titled “unknown device”.
Signal Integrity Inspection
The USB device must pass inspection tests on Signal integrity which include no load voltage, loaded voltage, upstream voltage,and downstream voltage.
Durability Inspection
The durability inspection should be tested against USB devices in conditions such as extreme heat, extreme cold, and water submersion.
Recently a newer version of USB, USB 2.0 has been released allowing to store more data and transfer the data faster than a larger optical disc drive such as a CD-RW or DVD-RW drive. USB is now used by many popular technology systems such as Xbox 360 , PlayStation 3 , DVD players and mobile phones.
