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.

Key Features

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

Specifications

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

Data Sheet