Tektronix TDSUSB2, Руководство пользователя

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Glossary
Signal Direction Upstream
It is defined as the direction of data flow towards the host. An upstream port is
the port on a device closest to the host that generates upstream data traffic from
the hub. Upstream ports receive downstream data traffic.
Tier
The position in the hub where the device is connected to the system.
Test Point
A device is classified as far end or near end depending upon the captive cable. A
device with captive cable is usually called as a far end device, otherwise as a near
end device.
Test Fixture
It is the break-out board that helps in probing signals.
UUT
Called as the Unit Under Test. The unit can be a USB device, hub, port or a host.
Upstream
The direction of data flow is towards the host. An upstream port is the port on a
device electrically closest to the host that generates upstream data traffic from the
hub. Upstream ports receive downstream data traffic.
V
BUS
It is the supply voltage which a function or hub requires to work.
TDSUSB2 Universal Serial Bus Measurement Package 235