Grass Valley MRC v.1.2 - Manual (Page 173)

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Glossary
3Gig Video at 2.97 or 2.967 Gbps. In Miranda routers, 3Gig cards support HD and SD signals as well.
Video at 3Gig conforms to SMPTE standard 424M.
Active Con-
trol Card A router may have both a primary and a secondary control for redundancy. One of the two
control cards is the active card and the other is inactive or stand-by.
AES A term used to represent the digital audio format (AES3id) generally supported at Miranda and
switched by NVISION series routers. AES is an abbreviation of the Audio Engineering Society, Inc.,
New York (www.aes.org).
AES/EBU (Audio Engineering Society/European Broadcasting Union) a professional serial interface for
transferring digital audio from CD and DVD players to amplifiers and TVs. AES/EBU is typically
used to transmit PCM and Dolby Digital 5.1, but is not tied to any sampling rate or audio standard.
AES3, AES3id NVISION series routers that switch audio generally support AES3id and provide 75 W BNC
connectors. AES3id is specified for 75 W coaxial cable up to 1000 meters. (AES3 uses 110 W
shielded twisted pair (STP) cable, with XLR connectors, up to a distance of 100 meters.)
Analog Audio A signal whose varying voltage represents the waveform of the audio.
Async AES,
Sync AES The term “Async AES” refers to an asynchronous (free-running) AES-compliant audio signal,
whereas “Sync AES” refers to a synchronous (clocked) AES signal with a data rate of 48,000
samples per second.
AVC Analog Video Conversion. A simple conversion from composite analog video input to an SD
digital output or vice versa.
Device As the term is used in an NV9000 router control system, a device is a grouping of input and output
ports, possibly spanning multiple routers of different types.
For example, a system might have 3 levels: video, AES, and time code. A hypothetical device in
this system is camera 1, which has video on input 1 of the video router, AES on input 5 of an AES
router, and time code on input 8 of a time code router.
EEPROM (EE or “serial EE” for short). Electrically erasable programmable read-only memory. In the context
of MRC, this is non-volatile memory on a router control card. EE keeps retains its data indefinitely
in the field (unless it is reprogrammed).
HD HD and HD-SDI are equivalent terms in Miranda terminology. An HD signal is a high-definition
video format that conforms to the SMPTE 292M standard.
Active Con-
trol Card A router may have both a primary and a secondary control for redundancy. One of the two
control cards is the active card and the other is inactive or stand-by.
I/O Inputs and outputs.
Matrix In general, a 2-dimensional array. In NVISION series routers, the switching mechanism is called a
crosspoint matrix, that is, a 2-dimensional array of crosspoints. A crosspoint is a theoretical point
where an input is connected to an output.
Module Any removable or replaceable subassembly. In MRC, a module is an input card, output card,
monitor card, control card, or a crosspoint card.