Glossary - Codan NGT 2010 RF Technical & Service Manual

Glossary

Term
ACE
AT commands
CAN protocol
channel
CHIRP
coder/decoder
control site
data terminal
equipment
digital signal
processor
Easitalk
effective
throughput
first-in first-out
fixed base station
frequency
frequency offset
handset
NGT Transceiver System Technical Service Manual
Means...
A peripheral semiconductor device used to provide additional
serial interfaces to a microcontroller or digital signal processor.
A set of commands commonly used to operate many types of
modems.
A communication method that has good error-detection capabilities
and performs well in high-noise environments.
Frequencies programmed in the transceiver to transmit and receive
signals on air.
A robust signalling protocol used by the HF Data Modem 3012
during link establishment.
A device combining an ADC and a DAC.
The site where the user or equipment that controls the system is
located.
An RS232-related term indicating a PC or terminal.
A microprocessor-like device that is designed to process high-
volume digital data streams quickly.
A feature that enables the user to reduce the level of background
noise that is present when listening to a channel.
The average data transfer rate taking into account the effects of
data compression. For example, if system throughput is 1000 bps
and data compression reduces data size by 50%, the effective
throughput is 2000 bps.
A buffer used in serial communications devices to reduce CPU
overheads.
A transceiver that is permanently installed and cannot be moved
without significant effort.
The number of cycles per second of a radio wave, usually
expressed in kilohertz.
The difference between the frequencies being used by a sending
and a receiving modem station. The variation is due to changes in
temperature, variations in power supply voltage or the aging of
components.
A hand-held device that is used to control the functions of a
transceiver. It consists of a microphone, PTT button, display and
keypad.
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