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8972PX Protection Switch
Key Features
•
Two-input robust failure-proof changeover
switch
•
Third alternate input, available for
switching, non relay-protected
•
Supports HD-SDI, SD-SDI, and DVB ASI
with auto-sensing capability
•
Will maintain signal path in the event of
power failure or when the front card is
removed
•
Eight outputs, including:
One main relay-protected output with
—
passive bypass path
One electronic output follows main
—
Three output pairs can be set to follow
—
main or backup or can be switched to
primary, secondary or alternate inputs
•
Line switching in driven switch mode
(SD/HD-SDI syncronous input signals)
•
External control via GPI or Ethernet
•
Autonomous control by:
Signal (carrier) loss detection
—
Incorrect signal format
—
EDH/CRC error (selectable threshold)
—
DVB-ASI PID loss
—
DVB-ASI packet loss
—
•
GeckoFlex dual-slot rear module
•
Asserting external control of the
module automatically turns off
autonomous control
Applications
•
Select between primary, secondary, and
alternate inputs paths
•
Switch to alternate input (i.e., apology
slide) when primary and secondary inputs
are both failing
Specifications
Supported Frame Types
GeckoFlex with 8900NET (Net Card) for configuration
Power Rating
9.0 Watts – dual slot
Inputs
SD/HD-SDI or ASI: Three
• Input equalization: up to 125m HD/330m SD/ASI
(when signal is not bypassed)
• Formats supported: 1080i @ 59.94, 50,
720p @ 59.94, 50, 480i @ 59.94 576i @ 50
• DVB ASI: yes
Outputs
Protected outputs: One
Insertion loss on protected output when
bypassed: Equivalent to less than 20m of Belden
1694A cable
Return loss: <15 dB (when signal is not bypassed)
Distributed outputs: Seven
Return loss: <15 db
The 8972PX is a full-time signal protection
switch. It is a highly robust primary/secondary
changeover switch for HD-SDI, SD-SDI, or ASI
signals. It can be controlled by autonomous
switching to a backup signal using in-built
detection of signal failure, switched by manual
controls, or driven by an external GPI system to
switch on command.
The 8972PX fulfils the basic requirement of
any protection system by not adding failure
modes to the existing signal path. In the event
of a power failure, or even if the front control
module is completely removed, the Program
Output signal will continue to pass from the
previously selected input as a fail-safe relay
path will latch the selected signal to the output.
In driven mode it can be configured by GPI or
Ethernet.
Primary
Secondary
Bypass Relay Controls
Alternate
GPI In
Equalization
& Reclocking
Equalization
& Reclocking
Equalization
& Reclocking
GPI In
GPI
• Switch to primary input
• Switch to secondary input
• Switch to alternate input
GPO
Primary input status (failed/good)
Secondary input status (failed/good)
Alternate input status (failed/good)
Switch state (primary/secondary/alternate)
Control and Monitoring
SNMP: Monitoring and switching control
Web page configuration: Yes
Local configuration: Switching control only
Newton support: Yes
NetConfig support: Yes
Alternate in
Switchable
Distributed
Out
Switchable
Distributed
Out
GPI I/O
Switchable
Distributed
Out
Relay
Protected
Out
Primary
In
All parameters can be configured via the
web browser interface and main parameters
via the Newton Control Panel. NetConfig
and NetCentral are supported respectively
for remote configuration and product health
monitoring. Asserting GPI control or other
manual controls will disable autonomous
control.
Latching
Relay
REAR MODULE
Control
FRONT MODULE
Autonomous
Main
Control
Local
Input
Control
Signal
Switch
GPI Out
Monitors
Manager
Backup
Configurable
Output
Pairs
Network
Control
GPI
Control
Ordering Information
Specifications
This module can be mounted in a GeckoFlex
frame but not in other 8900 series frames,
including Gecko-A or Gecko-V frames and it
requires two slots.
8972PX
SD/HD/ASI protection switch, front and dual rear
module set
8900PX-DBS
D-connector backshell option, fitting with rear high
density
For detailed specifications, installation, and setup
instructions see:
www.grassvalley.com/docs/modular
8900PX-DR
J1
J2
Switchable
Distributed
Out
J3
J4
Switchable
Distributed
Out
J5
J6
Switchable
Distributed
Out
J7
J8
Main
Distributed
Out
J9
J10
Secondary
In
Main
Protected
Output
Main
Distributed
Output
GPI Out
Switchable
Distributed
Outputs
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