Bridge Card - Studer OnAir 3000 Service Instructions Manual

3.3

Bridge Card

SCORE LIVE BRIDGE CARD A943.0370
Gigabit
Gigabit
Ethernet
GMII
PHY
Port 1
Gigabit
Gigabit
Ethernet
GMII
PHY
Port 2
DDR RAM BUS
128MByte
DDR
RAM
JTAG
Port
Date printed: 28.02.11
The SCore Bridge card is used in the SCore Live to manage the whole core
system. Two Gigabit Ethernet connectors provide a redundant connection
to the desk or host application. The card downloads code to the DSP cards
and passes serial data, parameters, and meter data between the desk or host
application and the DSP cards. Furthermore, a sub-circuit is acting as a master
clock generator for the system. It can accept video, WCLK and AES inputs
from the External Sync card, and generates a local clock from these. The
implementation has been made in such a way that a change from internal to
external sync or vice versa causes no audible artifacts, and the DSP cards will
continue processing. In a
setting within less than 10 seconds after powering up thanks to a non-volatile
memory (gold cap backup, capacity sufficient for approx. one week).
Two bridge cards may be plugged into the frame for redundant operation
(A943.037035 and up). The inactive bridge card will not be connected to the
system buses and remains in idle mode. The card is hot-pluggable.
Max. cable length for Ethernet links
Current consumption (5 V)
Operating temperature
ETH1
Local SRAM/SDRAM BUS
LOCAL
833MHz FLASH
CPU MEMORY
64MByte
(QNX Image)
ETH2
UART 1
RAM
UART 2
I2C
JTAG
EEPROM
256 Bytes
(MAC Addresses,
Production Test
Info)
A943.0370 (Redundant Version: A943.037035 and up)
system, the SCore Live runs with the last
BRIDGE_ACTIVE
VDCA TDM
Bus
Interface
SRAM
2MByte
(Core
Parameters)
Battery /
Gold Cap
Audio
Sync
Subcircuit
Local Power
Supply and
Temperature
Monitoring
SCore Live
75 m
approx. 2 A
0...40° C
Backplane
SCORE LIVE
TDM Bus
D21m (OnAir 3000)
SCORE LIVE
System Clock Bus
SCORE LIVE
Sync Bus
SCORE LIVE
I2C Bus
SCore Live 17