Grass Valley UniConfi NVISION Series v.2.1 - Manual (Page 155)

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Glossary
3Gig Video at 2.97 or 2.967 Gbps. In Grass Valley routers, 3Gig cards support HD and SD
signals as well. Video at 3Gig conforms to SMPTE standard 424M.
Active control
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 the inactive or stand-by card.
AES A term that represents the digital audio format (AES3id) generally supported at Grass
Valley 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 inter-
face 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 The AES routers support AES3id and provide 75
W BNC connectors. AES3id is specified
for 75
W coaxial cable up to 1000 meters. (AES3 uses 110W shielded twisted pair (STP)
cable with XLR connectors up to a distance of 100 meters.)
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
digital output or vice versa.
Baud rate The transmission rate of a serial communication link. Usually means bits per second.
D/A Digital to analog
DB25 A DB25 connector is the common 25-pin D-type connector.
dBu Unit of audio level where 0dBu is 0.775 V
RMS
.
DC Direct current
DCE Data Communication Equipment (an RS-232 term).
DE9 Sometimes called a DB9 connector, a DE9 connector is the common 9-pin D-type
connector.
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. These inputs
and outputs typically connect to a single physical device such as a VTR.