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Term
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Description
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Nanosecond
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A billionth of a second. Many computer operations, such as
the speed of memory chips, are measured in nanoseconds. Nanosecond
is often abbreviated as ns.
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Narrowband
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A signal where the transmission bandwidth is on the order
of its information bandwidth.
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NCO
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Acronym for Numerically Controlled Oscillator. Type of IP
used in creating sine/cosine applications.
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Netlist
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A file that describes the logic and the connections of a
circuit or a system.
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NetTV
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TV-centric information appliances that provide Internet access
and use the TV as their primary display. These are standalone
products that are set on top of the TV ("set-top").
These include TVs with Internet connectivity built in at the
time of manufacture. Examples: set-top boxes, integrated TVs,
enhanced traditional cable boxes, direct satellite devices.
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Network
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A collection of MPEG-2 Transport Stream multiplexes transmitted
on a single delivery system, e.g. all digital channels on
a specific cable system.
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Network Address
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A unique number associated with a host that identifies it
to other hosts during network transactions.
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Network layer
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The Network Layer controls the operation of the network or
sub-network (or sub-net). It decides which physical pathway
the data should take based on network conditions, priorities
of service, and other factors. The Network Layer relieves
the upper layers of the need to know anything about the data
transmission and switching technologies used to connect systems.
It is responsible for establishing, maintaining, and terminating
connections across the intervening communications facility.
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Network Printer
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A printer which is designed to connect to a network and
be used by groups of users, a sub-class of workgroup printers.
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NIC
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Network Interface Card. The circuit board or other hardware
that provides the interface between a communicating DTE and
the network. It allows communications with other stations
and usually refers to a network adapter card which installs
in a computer.
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NIST
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National Institute of Standards and Technology
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NoBL SRAM
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No Bus Latency SRAM
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Node
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Any network station
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Noise
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An ever present unwanted background signal that needs to
be compensated for or removed.
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Non encoded PST
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Data modulated by PSK (Phase Shift Keying) that is not modified
by the Reed-Solomon encoder before transmission.
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Nonvolatile
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Type of memory or configuration that retains programmed information
even when power is removed from the device. Examples of Nonvolatile
memory are EPROM or Flash-based CPLDs.
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NT (ISDN)
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Network Terminator
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NT1 (Network Termination Equipment for layer 1)
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Equipment that terminates the ISDN network connection at
OSI layer 1 (the physical layer). Specifically it terminates
the U interface and converts it into an S/T interface.
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NT2 (Network Termination Equipment for layer 2)
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Equipment that terminates the ISDN network interface at OSI
layer 2, (the data link layer). An example would be a PBX
that terminates a PRI connection and provides several BRI
interfaces. An NT2 interfaces to TAs or TE1s via an S interface
and to an NT1 via a T interface.
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NTSC
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The color TV system established by the US National Television
Standards Committee which is used in North America, Japan
and their dependents. NTSC produces interlaced 525 line 30
frames/pictures.
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NTSC format
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A color television format used in the United States. See
also PAL, SECAM.
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NVOD
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Near Video On Demand. Term properly describing movie service,
but now generally referring to all types of near-on-demand
services where viewers are able to order and see a given program
on an individual basis at a given time interval.
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