Specifications

October 8, 2003 Networking Alpha Signs (9700-0112C)
76 Glossary
modular network adapter
Used at Adaptive to connect a sign to an RS485 network.
modules
Subassemblies produced to contain a specific number of rows and columns of pixels to simplify the assembly
of larger signs and to permit more flexibility in the design and construction of signs.
moving message display
An electronic sign that combines text and graphics to convey a fixed or changeable, moving or unmoving
advertising or locational message. See also electronic display.
moving message sign
An electronic sign that combines text and graphics to convey a fixed or changeable, moving or unmoving
advertising or locational message. See also electronic display.
multiplexing
The most common technique used in indoor displays to get the greatest range of brightness. A scheme that
allows multiple signals to be transmitted at the same time across one physical channel.
NAK
Negative Acknowledgment. An ASCII or EBCDIC code indicating that a message has not been received
correctly.
NEMA
National Electrical Manufacturing Association. Creates standards for enclosures for electrical devices.
Domestic only. For Adaptive users, NEMA standards for enclosures protect displays from dirt, dust, and oil in a
factory setting.
network
A collection of interconnected, individually controlled devices, together with the hardware and software used
to connect them.
network address
A unique network layer number that refers to a device residing on a network.
node
An addressable entity on a network. The node acquires a unique 8-bit node number dynamically when it
connects to the network. It tries that address and node number again when it next connects to the network. If the
previous number is already in use, it tries again until a unique node address is found.
node address
A number acquired dynamically by each node when it connects to a network. A device’s node address is
combined with the network number to form its unique network address.
non-ventilated
Provides no intentional circulation of external air through the enclosure.
octet
A group of 8 binary digits operated on as a unit. Also called a byte or a character.
ODBC