Specifications

Appendix C - Glossary of Terms RS-422 And RS-485 Applications Ebook
Page 128 of 137 Manual Documentation Number: <DocNumber>
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Tx
Transmit or transmitter. When Morse code was used, the letter X was
commonly keyed rather than the full word, Tx rather than transmitter, xmit
rather than transmitter xceiver rather than receiver or Rx for receive/receiver.
Sometimes used as a label for transmit line pinouts. (TD also used for the
same purpose.)
U
Unbalanced Signal
Single-ended signal referenced to ground or common. Noise/hum picked up
cannot be canceled, often requires shielding. Compare to differential or
balanced outputs or inputs. In balanced signals, the outputs are 180 degrees
out of phase, in-phase common mode noise is canceled in the receiver.
USB (Universal Serial Bus)
Universal Serial Bus. A limited range high speed serial bus standard used to
expand or add functionality to a host computer. Permits connecting peripheral
devices such as hard drives, printers, scanners, optical drives, real time
video/audio devices or legacy serial or printer ports.
Requires drivers for the host operating system or requires that the OS provide
compatible drivers as part of the system software. Separate drivers usually
required for MacOS or Windows OS.
USB Hub
A USB host port expander that enables connection of more USB devices (up to
128 total) to a host USB port. Expansion is usually three or more ports.