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Glossary-9
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 See Universal Serial Bus.
VCO See voltage-controlled oscillator.
VHF Very-High Frequency.
VIP Vehicle Interface Port.
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 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. See also vocoder.
voltage-controlled
oscillator
An oscillator in which the frequency of oscillation can be varied by
changing a control voltage.
VSWR Voltage Standing Wave Ratio.
Term Definition
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