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GeckoFlex 8925DMB-U HD/SD & Digital Audio (AES/Dolby E) De-Embedder

The 8925DMB-U is a compact HD/SD digital audio de-embedder (audio demultiplexer) board. It provides four unbalanced AES outputs and supports both PCM audio and Dolby E. This board is ideal for building dense audio/video infrastructure for production and playout applications.

The 8925DMB-U also provides four HD/SD-SDI outputs, one of which is a direct reclocked feed of the input. The four AES outputs are synchronous to the video. Output PCM audio sample resolution can be forced to 20 or 24 bits.

With its fiber-ready architecture, the 8925DMB‑U can be configured to support up to two fiber inputs or up to two fiber outputs. Configured as a fiber transceiver it can take SDI from fiber, de-embed audio, and provides SDI output over fiber and discrete AES outputs. The dual-receiver option makes it ideal for receiving incoming feeds from longer distances with fiber input selection, and locally de-embedding audio for providing audio and SDI over copper.

All parameters can be adjusted via standard HTML web browsers or via the Newton Control. In addition, NetConfig and CommandCenter can be used for remote configuration and SNMP signal health monitoring.

  • Eight-channel HD/SD audio de-embedder (demultiplexer) with AES outputs
  • Any embedded audio stream can be passed and distributed to any discrete output
  • Choice of four unbalanced AES outputs
  • Four HD-SDI/SDI outputs (one active loop-through)
  • Support 48 kHz audio sample rate and 20-bit or 24-bit audio sample resolution
  • Handles Dolby E
  • Fiber-ready option for receiving or transmitting over fiber
  • Remote control and monitoring via Ethernet chassis interface
  • HD-SDI audio de-embedding
  • SD and HD signal handling
  • Receiving HD/SD SDI from fiber and de-embedded audio
Supported Chassis Types
GeckoFlex with 8900NET board for configuration

Power Rating
7.4 Watts – single slot

Video Inputs
  • Input equalization: HD up to 125m, SD up to 330m
  • Auto-sensing: yes
Optical: Single-mode (optional)
Formats supported: 1080i @ 59.94, 50, 720p @ 59.94, 50, 480i @ 59.94, 576i @ 50, 1080p @ 23.98, 1080sF @ 23.98

Audio Outputs
AES: Four outputs
Signal type – unbalanced: AES-3id-2001
Common mode range: N/A
Sampling rate: 48 kHz
Resolution: 20- or 24-bit
Output return loss: >15 dB (100 kHz to 12 MHz)
Input impedance: 75Ω
Connector type: BNC

Video Outputs
HD/SD-SDI: Four outputs
  • Return loss: >15 dB, 5 to 270 MHz; >15 dB typical, to 1.5 GHz
  • Signal level: SDI 800 mVp-p ±10%
  • Rise/fall time (20-80%): 140 ps typical for HD, 640 ps typical for SD
Output jitter, low jitter applied:
< 0.2 UI HD > 100 kHz
< 1.0 UI HD 10 Hz > 100 kHz
< 0.2 UI SD > 1 kHz
< 0.2 UI SD 10 Hz > 1 kHz
Optical: Single-mode (optional)

Electrical Length (delay)
SDI: HD input <400 ns, SD input <1.2 µs
AES (@48 kHz): HD input 0.41 ms, SD input 0.83 ms

Output audio stream: Silence or any embedded pair
Output audio resolution: 20-, 24-bit, or auto as input
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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