Specifications
Ordering Information
8900CTB-04
connects here
for balanced
analog inputs
Ω
Ω
Delay Control I/F
Loopthrough
Reference Input
AES or Video
LEDs
Filter
Analog 1
Analog 2
Filter
Delay
Controller
FPGA
Remote
Buffered
RS-232
24-bit
Stereo
ADC
Dual 75
Single 110
AES
TX
+
+
8900CTB-02
connects here
for 110Ω output
12
J1
J2
J3
J4
J5
J6
J7
J8
J9
J10
8900V-R
Left
Analog
Input
Delay
Control
Input
Delay
Control
Output
AES/EBU
Outputs
Reference
Input
Reference
Input
Loopthru
Right
Analog
Input
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
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
This module can be mounted in a GeckoFlex
frame when ordered with the 8900V-R GeckoFlex
Video rear module.
8920ADT
Audio A-to-D converter with autotracking delay 75Ω
unbalanced outputs
8920ADT-110
Audio A-to-D converter with auto-tracking delay 110Ω
balanced output supplied with one each 8900CTB-04
and 8900CTB-02
8920ADT
Audio A-to-D Converter with Autotracking Delay
For detailed specifications, installation, and setup
instructions see:
www.grassvalley.com/docs/modular
