User manual

Digital Monitor AMC-1DBx Series User Manual
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(separated) by idle (silent) periods.
Parity A parity bit is a bit that is added to ensure that the number of bits with the value one
in a set of bits is even or odd. Parity bits are used as the simplest form of error
detecting code.
There are two variants of parity bits: even parity bit and odd parity bit. When using
even parity, the parity bit is set to 1 if the number of ones in a given set of bits (not
including the parity bit) is odd, making the number of ones in the entire set of bits
(including the parity bit) even. If the number of on-bits is already even, it is set to a 0.
When using odd parity, the parity bit is set to 1 if the number of ones in a given set of
bits (not including the parity bit) is even, keeping the number of ones in the entire set
of bits (including the parity bit) odd. If the number of set bits is already odd, the odd
parity bit is set to 0. In other words, an even parity bit will be set to "1" if the number
of 1's + 1 is even, and an odd parity bit will be set to "1" if the number of 1's +1 is
odd.
PLC A Programmable Logic Controller (PLC) or programmable controller is a digital
computer used for automation of electromechanical processes, such as control of
machinery on factory assembly lines, amusement rides, or light fixtures.
QVGA The Quarter Video Graphics Array (also known as Quarter VGA, QVGA, or qVGA) is
a popular term for a computer display with 320×240 display resolution. QVGA
displays are most often used in mobile phones, personal digital assistants (PDA),
and some handheld game consoles. Often the displays are in a “portrait” orientation
(i.e., taller than they are wide, as opposed to “landscape”) and are referred to as
240×320.
Router A network device that forwards packets from one network to another. Based on
internal routing tables, routers read each incoming packet and decide how to forward
it. The destination address in the packets determines which line (interface) outgoing
packets are directed to. In large-scale enterprise routers, the current traffic load,
congestion, line costs and other factors determine which line to forward to.
UART A Universal Asynchronous Receiver/Transmitter, abbreviated UART, is a type of
"asynchronous receiver/transmitter", a piece of computer hardware that translates
data between parallel and serial forms. UARTs are commonly used in conjunction
with communication standards such as EIA RS-232, RS-422 or RS-485. The
universal designation indicates that the data format and transmission speeds are
configurable and that the actual electric signalling levels and methods (such as
differential signalling etc.) typically are handled by a special driver circuit external to
the UART.
UDP User Diagram Protocol – see IETF RFC 768
UI User Interface, the space where interaction between humans and machines occurs.
Zone An area which is being monitored for which an alarm anywhere in the zone will cause
the same result – i.e. if there are three sensors in “Zone 1” and if any of those
sensors goes into alarm “Fan A” will turn on. If there were only one sensor per zone,
each would turn on its own fan.