Grass Valley NV5128 v.2.5 - Manual (Page 99)

NV5128 Multi-Format Router • User’s Guide 89
8. Glossary
Chapter 8 is a glossary.
Glossary
Active Cards See Modules.
AES 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,
AES3-id The AES routers support AES3-id and provide 75 Ω BNC connectors. AES3-id uses 75Ω coaxial
cable up to 1000 meters. (AES3 uses 110 Ω shielded twisted pair (STP) cable with XLR connectors
up to a distance of 100 meters.)
Analog Audio A signal where the instantaneous voltage is proportional to the diaphragm velocity at the micro-
phone.
Async AES,
Sync AES The term “Async AES” refers to an asynchronous AES-compliant audio signal, whereas “Sync
AES” refers to a synchronous AES signal with a data rate of 48
kHz. A system where various sig-
nals are unlocked (not synchronized). Switching between signals leads to unpredictable results.
AVC “Analog Video Conversion.” Miranda uses this abbreviation to describe a simple conversion tech-
nique used to create an SD digital output signal from a composite analog video input, or to describe
the means by which SD signal is coded into an analog composite video output signal. Path delay
and subcarrier phase may not be precisely maintained in an AVC conversion path within an
NV5128 frame. AVC coding provides a cost-effective method to provide feeds to picture monitors
without requiring an external conversion device. AVC modules are not a substitute for professional-
grade format converters.”
Backplane Modular, rear-mounted assemblies containing the NV5128’s input and output connectors.
D/A Digital to analog
DC Direct Current
dBu Unit of audio level where 0dBu is 0.775 Vrms.
DB25 A DB25 connector is the common 25-pin subminiature D connector. Most modern PCs use a
female DB25 connector for the printer parallel port connector.
DE9 Sometimes mistakenly referred to as a DB9 connector, a DE9 connector is the common 9-pin sub-
miniature D connector. The serial port of modern PCs employ a male DE9 connector.
Device As the term is used in a NV9000 system, a device is a grouping of input and output ports that define
a logical entity. (The logical entity does not have to be a real entity.) For example, a system might
have 3 levels: video, AES, and time code. A hypothetical device in this system is Camera 1, which