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Key Features
•
AES/EBU differential loop-through input
•
20- or 24-bit modes
•
Wide range of output modes (swap, invert,
sum, tones, silence)
•
32 to 48 kHz sampling rate with indicators at
32, 44.1, and 48 kHz
•
Terminal block output via adapter
8900CTB-04
•
Independent output level control from
+14 dBu to +24 dBu
•
>110 dB "A weighted" signal-to-noise
ratio
•
Housed in the same frame with other
8900-V audio and video modules
•
Remote control via Ethernet frame
interface
Specifications
Supported Frame Types
GeckoFlex with 8900V-R GeckoFlex Video rear module,
Gecko video frames: 8900TX-V, 8900TF-V, 8900TFN-V
Power Rating
3.1 Watts – single slot
Input
Type: AES-3id-1992 – unbalanced
Number of inputs: One differential loop-through
Connector: 75Ω BNC
Common mode range: ±12 V pk DC –20 kHz
Input signal level range: 200 mV to 12 Vp-p
Sampling rates: Any rate from 32 to 48 kHz with
indicators at 32, 44.1, and 48 kHz
Input return loss: >15 dB (100 kHz to 10 MHz)
Maximum jitter: <200 ps RMS
Output
Number of outputs: One stereo pair
Output level: +14 to +24 dBu max
Output impedance: 50Ω single-ended, 100Ω
differential
Connector type: Terminal block through 8900CTB-04
BNC adapter board
8920DAC Audio D-to-A Converter
The 8920DAC is an easy-to-use digital
audio to analog audio converter. Its various
modes allow you to modify the outgoing
signal, such as channel swapping, channel
summing, phase inversion, and more. The
remote capability supports mode selection
and input monitoring. Typical applications
include interfacing between digital and analog
equipment, such as speakers, audio mixers,
and routers.
8900CTB-04
Terminal Block
to BNC Adapter
75 AES/EBU
AES
FPGA
RX
Loopthrough
Mode
Controller
Controls
Remote
Performance
Signal/noise ratio:
• >107 dB unweighted 22 kHz filter
• >110 dB "A" weighted
Frequency response: ±0.1 dB 20 Hz – 20 kHz
@ 48 kHz sampling
THD + noise: <0.004% @ 24 dBu
Quantization: 20- or 24-bit
Interchannel crosstalk: <–100 dB, 20 Hz to 20 kHz
DC offset: <±50 mV
Operating temperature: 0° to 45°C
Humidity: 10% to 90% non-condensing
Non-operating temperature: –10° to 70°C
Indicators and Controls
Indicators: Input data rates, power, de-emphasis,
fault, remote override communication active,
configuration
Controls: Operation modes (normal, channel swap,
phase invert, channel sum, tone), output gain
Remote: All Indicators and controls via frame Ethernet
except gain
8900V-R
J1
J2
Analog
Audio
Outputs
J3
J4
J5
J6
Not
Used
J7
J8
Not
Used
J9
J10
Loopthru
Filter
Gain
24-bit
Stereo
Filter
Gain
DAC
LEDs
Ordering Information
This module can be mounted in a GeckoFlex
frame when ordered with the 8900V-R GeckoFlex
Video rear module.
8920DAC
Audio D-to-A converter supplied with one 8900CTB-04
adapter
For detailed specifications, installation, and setup
instructions see:
www.grassvalley.com/docs/modular
13
Analog
Audio
Outputs
Not
Used
Not
Used
AES/EBU
Input
+
Analog 1
L
–
+
Analog 2
R
–
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