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GeckoFlex 8920ADT Analog Audio to Digital Audio Converter with Autotracking Delay

The 8920ADT takes the best features of our 8920ADC and incorporates them into one cost-effective, space-saving board. It provides conversion of analog audio to digital audio with the capability to simultaneously adjust for lip sync errors. It offers two forms of delay that are summed—a fixed delay of up to 1.365 seconds and a variable delay based on a signal from one of our video frame synchronizers, enabling you to adjust for a large, fixed lip sync error while continuously adjusting audio delay to match the video delay created by the frame sync. The 8920ADT also provides various modes of controlling the output audio signal such as channel swapping, channel summing, and phase inversion.

  • 24-bit resolution
  • 75Ω or 110Ω output
  • Wide range of output modes (swap, invert, sum, tones)
  • Loop-through reference input (video, AES-3id, AES word clock)
  • 48 kHz sampling rate
  • Terminal block input via adapter 8900CTB-04
  • Up to 1.365 second delay in 2 ms increments
  • Auto-tracks frame sync delays (8900FSS, 8981FS, RS-232 serial data)
  • Remote control via Ethernet chassis interface
Supported Chassis Types
GeckoFlex with 8900V-R GeckoFlex Video rear board, Gecko video chassis: 8900TX-V, 8900TF-V, 8900TFN-V

Power Rating
6 Watts – single slot

Analog Input Signal
Number of inputs: Stereo pair
Connector type: Terminal block 8900CTB-04
Input impedance: >22 kΩ
Input level: +0 to +30 dBu
Sampling rate: 48 kHz

AES Reference Input
Signal type: Composite video, AES-3id-1992, word clock (48 kHz sample rate)
Number of inputs: One loop-through
Input return loss: >90 dB at 50/60 Hz, >45 dB to 20 kHz

Signal type: AES-3id-1992 (75Ω), AES3 (110Ω)
Number of channels: Dual 75Ω outputs, single 110Ω output
Connectors: BNC (75Ω) terminal block adapter (110Ω)

Signal/noise ratio:
  • >102 dB, 20 Hz to 20 kHz
  • >105 dB "A" weighted
THD+noise, 20 Hz to 20 kHz: <0.005%, 20 Hz to 20 kHz, +24 dBu
Interchannel crosstalk: <–95 dB, 20 Hz to 20 kHz
Frequency response: ±0.05 dB relative to 1 kHz, 20 Hz to 20 kHz
Delay: Maximum: 1365 ms
Delay increments: 2 ms
Operating temperature: 0° to 45°C
Humidity range: 0% to 90% non-condensing

Indicators and Controls
Indicators: Tracking, level, remote override, power, communications active, CH1 and CH2 >–20 dBFS, CH1 and CH2 >–0.5 dBFS, clip level, internal fault, ref. locked, remote lock out
Controls: Level, delay
Remote: All controls and indicators via Ethernet
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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