6871620L01-C
May 28, 2008
Glossary
Glossary-9
thin small-outline
package
A type of dynamic random-access memory (DRAM) package that is
commonly used in memory applications.
time-out timer
A timer that limits the length of a transmission.
TOT
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
Asynchronous
Receiver Transmitter
A microchip with programming that controls a computer's interface to its
attached serial devices.
Universal Serial Bus
An external bus standard that supports data transfer rates of 12 Mbps.
USB
VCO
See voltage-controlled oscillator.
vector sum excited
linear predictive
coding
A voice-encoding technique used in ASTRO digital voice.
VHF
Very-High Frequency.
VIP
Vehicle Interface Port.
VOCON
vocoder
An electronic device for synthesizing speech by implementing a
compression algorithm particular to voice.
vocoder/controller
A PC board that contains an ASTRO 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.
voltage-controlled
oscillator
An oscillator in which the frequency of oscillation can be varied by
changing a control voltage.
VSELP
See vector sum excited linear predictive coding.
Term
Definition
Summary of Contents for ASTRO XTSTM 4000
Page 1: ...COLOR CHORDS 7 ASTRO XTSTM 4000 Portable Radio Detailed Service Manual ...
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Page 16: ...May 28 2008 6871620L01 C xiv Commercial Warranty Notes ...
Page 22: ...May 28 2008 6871620L01 C 1 6 Introduction Notes ...
Page 26: ...May 28 2008 6871620L01 C 2 4 Radio Power Notes ...
Page 56: ...May 28 2008 6871620L01 C 3 30 Theory of Operation Notes ...
Page 100: ...May 28 2008 6871620L01 C 6 8 Troubleshooting Waveforms Notes ...
Page 194: ...May 28 2008 6871620L01 C B 2 Motorola Service Centers Notes ...
Page 204: ...May 28 2008 6871620L01 C Glossary 10 Glossary Notes ...
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