Grass valley 8931 DATASHEET
8931 Digital Video Fanout Distribution Amplifier 27
Key Features
•Passive differential loop-through design adds system flexibility and reliability
•Eight outputs
•Auto input cable equalization up to 300m
•Supports both component and composite signals, all data rates 143, 177, 270, 360 Mb/s
•Front panel LED indicate EQ warning
•Remote health monitoring
NOTE: ASI compatibility with 0° in phase outputs
The 8931 digital video fanout distributor amplifier is designed for distributing all major serial digital video formats. It is especially suited for short runs of recently reclocked signals where jitter is not a problem.
8900V-R
SDI only Outputs (180 º)
J1 J2
J3 J4
J5 J6
ASI/SDI Outputs (0 º)
SDI only 
Output 
(180 º)
ASI/SDI |
J7 |
J8 |
ASI/SDI |
Outputs |
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Output |
(0 º) |
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|
(0 º) |
J9 |
J10 |
ASI/SDI |
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|
Input |
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|
(0 º) |
Loopthru |
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|
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ASI/SDI or 4fsc |
ASI, SDI or |
EQ |
Outputs (0) |
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4fsc Input |
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SDI or 4fsc Outputs (180)
Only
EQ Warning
Adjustment Input
Monitor 
EQ Warning LED
Specifications
Supported Frame Types
GeckoFlex with 8900V-R GeckoFlex Video rear module, Gecko video frames: 8900TX-V, 8900TF-V, 8900TFN-V
Power Rating
2.5 Watts – single slot
Input
Type: Serial digital (SMPTE 259M A, B, C, and D)
Connector type: BNC
Impedance: High Z differential loop-through Supported data rates: 143, 177, 270, and 360 Mb/s
Return loss: >18 dB up to 270 MHz, >15 dB up to 360 MHz
Automatic cable equalization:
<300 meters (up to 270 Mb/s) <200 meters (up to 360 Mb/s)
Output
Type: Serial digital (SMPTE 259M A, B, C, and D)
Number of outputs: Eight Connector type: BNC Impedance: 75Ω
Return loss:
>18 dB up to 270 MHz >15 dB up to 360 MHz
Performance
No signal reclocking Electrical length: 3.4 ±1 ns
Temperature range: 0° to 50°C (all specifications met)
Health monitoring: Power supply fault alert per SMPTE 269M
•Input signal present
•Input EQ warning
Indicators and Controls
Indicators: EQ warning
Remote: Frame alarm
Ordering Information
This module can be mounted in a GeckoFlex frame when ordered with the 8900V-R GeckoFlex Video rear module.
8931
Digital video fanout distribution amplifier
For detailed specifications, installation and setup instructions see: www.grassvalley.com/docs/modular
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