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GeckoFlex 8906 Analog Video Clamping Equalizing Distribution Amplifier

This distribution amplifier offers all the features and functionality of our 8901 utility DA and our 8902 equalizing DA, plus a dual-speed clamp and video presence detection with SNMP trap generation. While all Grass Valley distribution amplifiers remove differential or common mode hum induced by cable runs adjacent to AC mains cables, this board offers a dual-speed self-clamping circuit to handle single-ended hum caused by grounded coaxial cable shields.

Additionally, a White Clipper circuit eliminates impulse noise above a user-selectable threshold. And the user-enabled video presence detection feature generates SNMP traps that can be sent to our CommandCenter SNMP manager or other SNMP systems for mission-critical applications.

  • Suitable for NTSC, PAL, SECAM, RGB, YUV, Tri-level sync
  • Passive differential looping input with eight active outputs
  • NTSC/PAL input presence detection with SNMP trap generation
  • Selectable AC, DC, DC restore, or clamp (slow/fast) input coupling
  • Selectable, dual-speed clamp for single-ended hum rejection
  • Adjustable White Clipper removes peak impulse transients
  • Card-edge adjustable cable-specific equalization for up to 300 meters
  • Card-edge adjustable gain control
  • Excellent differential gain and phase specifications
  • Card-edge status indicators
Supported Chassis Types
GeckoFlex with 8900V-R GeckoFlex Video rear board, Gecko video chassis: 8900TX-V, 8900TF-V, 8900TFN-V

Power Rating
2.3 Watts – single slot

Input
Type: 1 Vp-p analog video with operation up to 2 Vp-p NTSC, PAL, SECAM, RGB, YUV, Tri-level sync
Connector type: BNC
Impedance: Passive high impedance differential loop-through
Return loss: >40 dB up to 5 MHz
CMRR: >66 dB 50/60 Hz
Common mode input: ±10V

Output
Voltage: 1 Vp-p ±2 dB
Number of outputs: Eight active plus one passive loop-through input
Connector type: BNC
Impedance: 75Ω
Return loss: >40 dB up to 5 MHz
Output DC: <50 mV

Performance
Cable equalization: Dual range
  • 0 to 150m (0 – 500 ft.)
  • 150 to 300m (500 – 1000 ft.)
White clip: On/off user selectable
Frequency response:
  • ±0.05 dB to 5 MHz
  • ±0.1 dB 5 to 8 MHz
  • –1 dB at 16 MHz
Differential gain: <0.1%
Differential phase: <0.1°
Gain range: ±2 dB
Tilt: <0.5%
Coupling: AC, DC, DC restore, clamp two speeds
Clamp hum rejection:
  • Slow: 20 dB
  • Fast: 46 dB
Electrical length: 22 ns
Temperature range: 0° to 30°C

Indicators/Controls
User controls: Output gain adjustment range: ±2 dB EQ adjustment for up to 300 meters of input cable
White clipper adjustment range: 500 mV to 1200 mV
LED indicators: Fault, power, frame bus communication
November 25, 2013
Hillsboro, Ore., November 25, 2013 — Brazil's Canção Nova, a non-profit Catholic Community located in Cachoeira Paulista in the state of São Paulo, is upgrading its broadcast infrastructure with a range of Grass Valley® solutions including five Maestro™ branding and master control systems, five Concerto™ 64x64 routing switchers, five GeckoFlex™ signal processing systems, and six K2 Summit® servers for optimized live event workflows. The system will be live in November and span five locations.
November 12, 2013
Hillsboro, Ore., November 12, 2013 — Bank TV, a satellite broadcaster in the Ukraine, has launched a complete, end-to-end high definition (HD) news production solution from Grass Valley® to facilitate the smooth delivery of its 24/7programming. At the core of the broadcaster's new structure is GV STRATUS® nonlinear media production tools for enhanced production and a streamlined workflow. GV STRATUS is being used in tandem with EDIUS® multiformat nonlinear editing software and GV Edge™ Integrated Playout System with K2 Edge™ playout nodes for 24/7 playout. This deal with Bank TV builds upon the recent momentum generated by Grass Valley in the Ukrainian broadcast market as well as traction gained by GV STRATUS in the EMEA region.
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