GeckoFlex 8920ADT Audio A-to-D Converter with Autotracking Delay

The 8920ADT takes the best features of our 8920ADC and 8916, and incorporates them into one cost-effective, space-saving module. 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.

Key Features

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 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
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

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

Performance
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

Data Sheet