# Glossary of EE Terms

### Term

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Historically defines short-range radios, used at the tactical level within the armed forces compared to strategic long range communication systems. Enhanced technology and capabilities has resulted in many tactical radios supporting much longer ranges and the term is now often associated with man portable or hand-held radios used by the warfighter.

• ### Tap

Tap is a short impact or strike, similar to a mouse click.

• ### Temperature Drift

Temperature drift is specified as the maximum change from the ambient (25°C) value to the value at either TMIN or TMAX. For offset and gain drift, the drift is reported in ppm of full-scale range (FSR) per °C. For reference drift, the drift is reported in ppm per °C.

• ### Tilt, inclination

Tilt or inclination is the angle displacement from a defined reference. In many cases, that defined reference point is the earth’s horizon. An accelerometer’s response to Earth’s gravitational field can be used to determine tilt with respect to the Earth’s surface.

• ### Time Domain

Time domain is a term used to describe the analysis of mathematical functions, or physical signals, with respect to time. A time domain graph shows how a signal changes over time, whereas a frequency domain graph shows how much of the signal’s energy lies within each given frequency band over a range of frequencies.

• ### Total Harmonic Distortion (THD)

The ratio of the RMS sum of the first 6 harmonics to the RMS value of the measured fundamental. Specified in percentage, and, sometimes, dB.

• ### Total ionizing dose (TID)

The measure of the energy deposited in a medium by ionizing radiation per unit mass. It is equal to the energy deposited per unit mass of medium, which may be measured as joules per kilogram and represented by the equivalent SI unit, gray (Gy), or the antiquated CGS units, rad and rep.

• ### Trajectory

Trajectory is the path that a moving object follows through space.

• ### Transceiver

A transceiver is a device comprising both transmit and receive functions which share common circuitry. In the context of industrial automation, transceivers are used to transmit and receive information across the bus network between devices.

• ### Transient Response Time

Transient response time is defined as the time it takes for the ADC to reacquire the analog input after a transient from 10% above negative full scale to 10% below positive full scale.

• ### Translational motion

Translational motion is motion along a straight line, such as an axis. Accelerometer data can be used to map an object’s trajectory in translational motion.

• ### Two Tone Intermodulation Distortion (IMD)

The ratio of the rms value of either input tone to the rms value of the worst third order intermodulation product; reported in dBc.

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