Status reporting, Standard definition, Status reporting standard definition – Grass Valley NV5128 v.2.5 User Manual
Page 37: Introduction
NV5128 Multi-Format Router • User’s Guide
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2. Introduction
Active Cards
Each card is listed by the type of signal it manages. For your convenience, the part number for each
card has been included. For a list of all video input cards and output cards and their associated
backplanes, see
Cards, Card Sets, and Backplanes
Card Power and Fuses
Each input card and output card uses direct current converters (DC/DC) to convert the correspond-
ing backplane’s +48
VDC into the appropriate regulated supply voltage(s). The combination of pre-
regulators and DC/DC converters and supply voltages varies from module type to module type,
depending on the requirements of the associated circuitry. There is a non-serviceable, self-resetting
1A fuse located on each module.
Status Reporting
All video input cards and output cards feature a circuit that performs status reporting and drives the
card’s functions. Two LEDs on the front of the card indicate the card’s status: alarm (Red), power
good (Green). Three additional LEDs on the output cards, situated further back on the card, indicate
the card is “healthy” (Amber) and that good communication (Green) or bad communication (Red)
exists. For more information, see
The functions of each type of card are described in the proceeding sections. Cards are listed by the
signal type supported.
Standard Definition
Incoming and outgoing SD signals are received and distributed through 16 BNC connectors,
housed on a backplane. The backplane for SD incoming signals is active and unique to SD signals.
(See
on page 13.) The backplane for SD outgoing signals is passive.
SD input cards and output cards can be inter-mixed with Analog Video Converter (AVC) input
cards and AVC output cards to achieve seamless conversion between digital and analog video for-
mats. (See
on page 30.) Inputs can be routed to both digital and analog
destinations without the need for external conversion devices.
Input Card
The SD input card (EM0383) receives up to 16 incoming SD signals through BNC connectors on
the active backplane. (See
on page 13.) Equalizers on the backplane automatically
compensate for 300
m of cable (Belden 1694A or equivalent). The equalized signal is forwarded to
cable drivers that feed the signal to the input card. On the input card, the SD signal is buffered to
compensate for any loss accumulated as the signal is forwarded to the motherboard and the output
card.
Output Card
The SD output card (EM0384) receives up to 16 SD signals from the motherboard. A bus receiver
feeds the signals to a crosspoint array (128 inputs x 16 outputs) for switching. From the crosspoint,
the SD signal is forwarded to a re-clocker, which automatically switches between 143, 177, and
270
Mb/s sample rates. If the sample rate is non-standard, the re-clockers pass the signal to the
cable driver, which forwards the signal to passive backplane I/O connectors for distribution.
Note
If desired, each re-clocker can be selectively disabled or re-enabled using UniCon-
fig. See the UniConfig User’s Guide.