Specifications Ordering Information
J1 J2
J3 J4
J5 J6
J7 J8
J9 J10
Outputs Outputs
Loopthru
Input
8900V-R
Reclocker
LEDs
Video
Input
Presence
Detection
EQ
ASI or
SDI In
Local
Control
Bypass
Switch ASI or
SDI Out
Ethernet Control
via frame bus
Microprocessor
28
This module can be mounted in a GeckoFlex
frame when ordered with the 8900V-R GeckoFlex
Video rear module.
8937
SDI/ASI reclocking equalizing distribution amplifier
This distribution amplifier is ideal for medium-
to long-distance distribution of digital signals.
It is fully DVB ASI compatible so it can be used
in any application where standard SDI video or
ASI signals are to be copied and distributed.
The standard reclocker circuit greatly reduces
jitter induced over long cable runs or from
unstable sources of standard data rate signals.
The reclocker can easily be disabled to pass
SMPTE 310M and other non-standard data
rate signals. A user-enabled video presence
detection feature generates SNMP traps that
can be sent to our NetCentral SNMP manager
or other SNMP systems.
Key Features
Passive differential looping input with•
eight active outputs
Suitable for SMPTE 310M, SMPTE 259M,•
DVB ASI, SDI 270 Mb/s plus most other
800 mV data from 4 Mb/s to 360 Mb/s
Input presence detection with SNMP trap•
generation
Reclocking circuit eliminates jitter•
Automatic input cable equalization for up•
to 300 meters
Card edge LEDs status indicators•
Supported Frame Types
GeckoFlex with 8900V-R GeckoFlex Video rear module,
Gecko video frames: 8900TX-V, 8900TF-V, 8900TFN-V
Power Rating
3 Watts – single slot
Input
Type: 800 mV ±10% serial digital data including
SMPTE 259M
Connector type: BNC
Impedance: High Z differential loop-through
Supported data rates: 4 Mb/s through 360 Mb/s
Reclocked data rates: 143, 177, 270, 360 Mb/s
Return loss: >15 dB (up to 360 MHz)
Auto equalization: Up to 300 meters (270 Mb/s)
Output
Type: 800 mV serial digital data in phase with the
input signal
Number of outputs: Eight active plus one passive
loopthrough
Connector type: BNC
Impedance: 75Ω
Return loss: >15 dB (up to 360 MHz)
Performance
Electrical length: <20 ns
Temperature range: 0° – 45°C
Local Indicators/Controls
LED indicators:
•Signalpresence
•Inputsamplerate
User controls:
•Bypass/autojumperselectionforreclocker
•Local/local-remotecontrolenablejumper
Remote: SNMP trap generation – input presence
detection
8937 SDI/ASI Reclocking Equalizing Distribution Amplifier
For detailed specifications, installation, and setup
instructions see:
www.grassvalley.com/docs/modular
