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Glossary
Synchronous mode — Timing or transmission mode in which sending and receiving
devices are synchronized with each other using a common clock, and no start or stop
bits are used. See Asynchronous mode.
T
T — Transmit data to DCE circuit (X.21).
TD — Transmit data to DCE circuit (RS-232/V.24, EIA-530, MIL-188c).
Term — See Terminate.
Terminate — An application where the instrument is terminating the circuit and sends
and receives traffic.
TM — Test mode from DCE circuit (all supported interfaces except X.21).
TR — Data terminal ready to DCE circuit (RS-449/V.36, and MIL-188-114).
TT — Transmitter signal element timing to DCE circuit (all supported interfaces except
V.35 and X.21). See SCTE and X.
Tx — Transmit
U
USB — Universal Serial Bus. A bus designed to handle a broad range of devices, such
as keyboards, mouses, printers, modems, and hubs.
V
V.24 — Recommendation describing a data communications interface that uses unbal-
anced, bipolar, slew rate limited, V.28 amplifiers.
V.35 — Recommendation describing a data communications interface that uses
balanced V.35 amplifiers for clock and data circuits, and unbalanced V.28 amplifiers for
signaling circuits.
V.36 — Recommendation describing a data communications interface that uses
balanced V.11 amplifiers for all circuits except test mode circuits. The V.36 test mode
circuits use unbalanced V.10 amplifiers. The V.10 amplifiers can also be used for
signaling circuits.
X
X — Transmitter signal element timing to DCE circuit (X.21).
X.21 — Recommendation describing a data communications interface that uses
balanced X.26 circuits (equivalent to V.11) and unbalanced X.27 circuits (equivalent to
V.10) circuits.
Data Communications and Diphase Testing Manual
January 2016 21148872, Rev. 002 Page 51