90 Rev 2.3 • 14 Oct 08
8. Glossary
Glossary
have 3 levels: video, AES, and time code. A hypothetical device in this system is Camera 1, which
consists of video on input port 1 of the video router, AES on input port 5 of the AES router, and
time code on input port 8 of the time code router. (The NV5128 does presently include time-code
routers.)
EIA Electronic Industries Alliance. The EIA (until 1997 Electronic Industries Association) is a trade
organization for electronics manufacturers in the United States. EIA is accredited by the American
National Standards Institute (ANSI) to help develop standards on electronic components, consumer
electronics, electronic information, telecommunications, and Internet security.
ESD Electrostatic discharge
HD HD and HD-SDI are equivalent in NVISION terminology. An HD signal is a high definition, serial
digital interface video format that conforms to the SMPTE 292M standard.
Hot-Swappa-
ble
A module that is “hot-swappable” can be safely removed and/or installed while power is applied to
the system.
I/O Inputs and outputs are the physical connections (e.g., BNCs) on the back of the routing switcher.
The term “input port” is used interchangeably with “input” and the term “output port” is used inter-
changeably with “output.”
Jumpers Jumpers are small, plastic sleeves that fit over a set of pins. The placement of the jumper either
turns a function on or off, or reconfigure a function.
LED Light Emitting Diode
Matrix 1. The rack-mounted NV5128 chassis or frame which contains the subassemblies (modules, back-
planes, power supplies, etc.) which comprise the NV5128.
2. An X-Y array of crosspoint switches, a crosspoint matrix.
Module 1. In the NV5128, modules are electronic assemblies that plug into the matrix. Modules include but
are not limited to input, output and controller printed circuit boards also called active cards.
2. Any removable subassembly may be referred to as a module. NV5128 backplanes may occasion-
ally be referred to as modules.
Operator The term operator usually refers to users other than the system administrator. An operator is respon-
sible for making most of the routes.
Physical Level In a Multi-Format Router system, a physical level is the same thing as a router. The idea is that mul-
tiple routers provide different “levels” on which to switch the signals of devices. Any particular
device might send or receive HD, SD, AES, time-code, or machine-code signals. A Multi-Format
Router switches one type, or level, of a device’s signal set.
Physically
Contiguous
Matrix modules are said to be in physically contiguous slots in an NV5128 frame when both the
inputs and outputs associated with those slots are in numerical sequence. For example, input slots 5
and 6 are physically contiguous because inputs 1-16 and 17-32 are in numerical sequence. In the
same way, output slots 4 and 16 are contiguous because outputs 49-64 (slot 4) and 65-80 (slot 16)
are in numerical sequence.
Port A port is the physical connection on a router. In a Multi-Format Router system, a port can only be
an input port or an output port.
Reference Sig-
nal
A timing signal used to synchronize events such as the switching of video signals during a specific
portion of the vertical interval. Reference signals are externally applied. In their absence, internally
generated signals are used to sustain operation.
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General