Glossary-9

 

 

 

 

 

 

 

 

Term

Definition

 

 

 

 

 

 

termination

An impedance, often resistive, that is connected to a radio as a dummy

 

 

load, for test purposes.

 

thin small-outline

A type of dynamic random-access memory (DRAM) package that is

 

package

commonly used in memory applications.

 

time-out timer

A timer that limits the length of a transmission.

 

TOT

See time-out timer.

 

transceiver

Transmitter-receiver. A device that both transmits and receives analog

 

 

or digital signals. Also abbreviated as XCVR.

 

transmitter

Electronic equipment that generates and amplifies an RF carrier signal,

 

 

modulates the signal, and then radiates it into space.

 

TSOP

See thin small-outline package.

 

TX

Transmit.

 

UART

See also Universal Asynchronous Receiver Transmitter.

 

UHF

Ultra-High Frequency.

 

Universal

A microchip with programming that controls a computer's interface to its

 

Asynchronous

attached serial devices.

 

Receiver Transmitter

 

 

 

Universal Serial Bus

An external bus standard that supports data transfer rates of 12 Mbps.

 

USB

See Universal Serial Bus.

 

VCO

See voltage-controlled oscillator.

 

VHF

Very-High Frequency.

 

VOCON

See vocoder/controller.

 

vocoder

An electronic device for synthesizing speech by implementing a

 

 

compression algorithm particular to voice. See also voice encoder.

 

vocoder/controller

A PC board that contains a radio’s microcontroller, DSP, memory, audio

 

 

and power functions, and interface support circuitry.

 

voice encoder

The DSP-based system for digitally processing analog signals, and

 

 

includes the capabilities of performing voice compression algorithms or

 

 

voice encoding. See also vocoder.

 

voltage

The electric pressure between two points, which is capable of producing

 

 

current flow when there is a closed circuit between the two points.

 

voltage-controlled

An oscillator in which the frequency of oscillation can be varied by

 

oscillator

changing a control voltage.

 

XCVR

See transceiver.

6881094C12-A

November 11, 2004

Page 217
Image 217
Motorola SSETM 5000 service manual Tsop