IP-HE950 Hardware User's Guide
Glossary
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be strongly resistant to noise, travels on cables as
long as 1.2 km, and has a maximum
communication speed of 10 Mbps.
SD-SDI (Standard Definition television
- Serial Digital Interface)
Standard definition digital video interface
standardized in SMPTE 259M.
SFP (
Small Form-factor Pluggable)
Module that can connect various interfaces to
FPGA and other such devices, when inserted into
a generic SFP cage and connector.
SG (Signal Ground)
Ground for signals.
Square division
One method used to divide the screen to transmit
4K video to quad-link 3G-SDI. 4K video is
transmitted divided into four full-HD videos.
Subnet mask
Mask value used for obtaining a subnet network
address from an IP address. The subnet address
is obtained using an AND operation between an IP
address and subnet mask.
TCP (Transmission Control Protocol)
A protocol required for direct connection to the
Internet. In the OSI reference model, TCP
corresponds to the transport layer and IP
corresponds to the network layer. TCP has been a
global standard protocol supported by the major
operating systems, including UNIX, OS/2, and
Windows.
TS (Transport Stream)
Abbreviation of Transport Stream, which is in
MPEG-2 Systems for multiplexing video, audio,
and data. The TS method is used for transmission
in an environment, such as ATM communication
or digital broadcasting, where errors may occur.
TTL (Time To Live)
Abbreviation of Time To Live, which indicates the
survival time of a packet on a network. If a packet
sent to a network happens to enter a loop
because of a setting error on a router, it will not
survive forever but will be discarded when the
specified survival time is reached.
UDP (User Datagram Protocol)
TCP/IP transaction protocol used for specific
applications such as remote network management
and naming service access.
Unicast
Communication with a station at a single address
(that is, most general one-to-one communication).
UTP cable
An unshielded pair of wires twisted together. UTP
is an abbreviation for unshielded twisted-pair.
These wires are used for Ethernet cabling and
other purposes.
VFD (Vacuum Fluorescent Display)
Also called a fluorescent display tube. Unlike a
liquid crystal display, the displayed content itself
emits light, so the contrast is clearer than on an
LCD. Other features of a VFD are operability over
a wide temperature range and less influence on
function by the temperature gradient.
10BASE-T
A LAN that uses unshielded twisted-pair (UTP)
cables and complies with the IEEE 802.3 standard.
A 10BASE-T connection uses a concentrator
called a hub. It is widely used because special
cabling work is not necessary and wiring can be
done easily. The maximum length of cable wiring
is 100 m.
100BASE-TX
One of the 100BASE LAN standards (also called
Fast Ethernet). It supports a transfer rate of 100
Mbps. Other 100BASE standards are
100BASE-T4 and 100BASE-FX, and the
difference is the type of cable used. 100BASE-TX
uses unshielded twisted-pair (UTP) cables. It also
uses the RJ-45 connector, which is similar to the
modular jacks used for telephones.
1000BASE-T
One of the Gigabit Ethernet standards for a
communication speed of 1 Gbps. The
specifications were standardized as IEEE 802.3ab
in 1999. Similar to 100BASE-TX, the standard
uses UTP cables in Category 5 (CAT5) and
Enhanced Category 5 (CAT5e), and all four pairs
and eight bits of a signal line are used. The
maximum transmission distance is 100 m. The
network topology is a star-type LAN with a hub at
the center. 1000BASE-T is a cable-based
standard so if the connected equipment on an
