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GeckoFlex 8921DAC Four-Channel Audio D-to-A Converter with Delay

The 8921DAC provides conversion of two digital audio streams, either balanced or unbalanced, to four analog audio outputs. In addition to digital to analog conversion, it offers per-channel independent delay with up to 5 seconds per channel. Its various modes enable modification of the outgoing analog signal, such as channel gain, swapping, channel summing, phase inversion, and more. Many adjustments to this card can be performed directly on the module's card-edge controls while a few of the more complex adjustments require the Web-based interface or the Newton™ control panel.

  • Two 32-96 kHz AES/EBU digital audio inputs, either balanced or unbalanced
  • 24-bit D-to-A conversion
  • Four balanced analog audio outputs
  • 0 dBFS supports up to +24 dBu
  • Four buffered digital balanced outputs
  • Independent control of each audio:
    • Channel including
    • Channel pairing
    • Level adjustments
    • Phase inversion
    • Delay of up to 5 seconds
    • Tone generation
  • Card-edge control and status indicators

Supported Frame Types
GeckoFlex with 8900A-R GeckoFlex Audio rear module, Gecko audio frames: 8900TX-A, 8900TF-A, 8900TFN-A


Power Rating
8 Watts – single slot


Digital Input
Digital audio input signal:

  • Balanced: AES-3id-1992
  • Unbalanced: AES-3id-1995
Number of inputs: Two balanced or unbalanced
Connector type:
  • Balanced: mini-screw terminal block
  • Unbalanced: BNC
Common mode range:
  • Balanced: 20 Vp-p DC – 20 kHz
  • Unbalanced: N/A
Sampling rate: Input sampling rate 32 to 96 kHz and output sampling rate 48 kHz
Input return loss: >25 dB (100 kHz to 10 MHz)
Input impedance:
  • Balanced: 110Ω
  • Unbalanced: 75Ω

Analog Output
Number of outputs: Four channels, single output each channel
Output impedance: 5Ω single-ended and 10Ω differential
Connector type: Mini-screw terminal block


Performance
Signal/noise ratio: >104 dB unweighted 22 kHz filter, >107 dB "A" weighted
THD + noise swept, 20 Hz to 20 kHz: >0.01% 22 kHz filter, +24 dBu (≥–80 dB)
Interchannel crosstalk: <–100 dB 20 Hz to 20 kHz
Frequency response: ±0.1 dB 20 Hz to 20 kHz wrt 1 kHz @ 48 kHz


Other
Operating temperature range: 0° to 45°C
Non-operating temperature range: –10° to +70°C
Humidity: 10% to 90% non-condensing

March 28, 2013
San Francisco, Calif., March 28, 2013 — Iglesia Cristiana Casa de Dios—the largest and fastest growing church in Guatemala—has selected Grass Valley® Live Production solutions to outfit its new church in order to produce high-quality programs for church members and viewers. Daily, Iglesia Cristiana Casa de Dios airs Latin America's number one rated Christian program on TBN's "Enlace" as well as Daystar's "Casa de Dios" and "Noches de Gloria". The programs are seen throughout the U.S., Central and South America, and parts of Europe.
August 14, 2012
San Francisco, Calif., August 14, 2012 (SET 2012 Broadcast & Cable, Stand D13/E2) — At the upcoming SET 2012 Broadcast & Cable show in Brazil, Grass Valley™ will demonstrate how acquiring, producing, and distributing all types of high-definition (HD) content with its latest technology solutions can save users time and money, while making their workflows much more efficient.

GeckoFlex 8921DAC Four-Channel Audio D-to-A Converter with Delay Data Sheet

Posted Mar 09 2011 (MOD-4017M-5 8921DAC) File Size: 225.5 KB

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