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8925DMB-U SD/HD Unbalanced Audio De-Embedder
Key Features
•
Eight-channel SD/HD audio de-embedder
(demultiplexer) with AES outputs
•
Any embedded audio stream can be
passed and distributed to any discrete
output
•
Choice of four unbalanced AES outputs
•
Four HD-SDI/SDI outputs (one active loop-
through)
•
Support 48 kHz audio sample rate and
20-bit or 24-bit audio sample resolution
•
Handles Dolby E
•
Fiber-ready option for receiving or
transmitting over fiber
•
Remote control and monitoring via
Ethernet frame interface
Applications
•
HD-SDI audio de-embedding
•
SD and HD signal handling
•
Receiving SD/HD-SDI from fiber and
de-embedded audio
Specifications
Supported Frame Types
GeckoFlex with 8900NET (Net Card) for configuration
Power Rating
7.4 Watts – single slot
Video Inputs
SD/HD-SDI:
• Input equalization: HD up to 125m, SD up to 330m
• Auto-sensing: yes
Optical: Single-mode (optional)
Formats supported: 1080i @ 59.94, 50,
720p @ 59.94, 50, 480i @ 59.94, 576i @ 50,
1080p @ 23.98, 1080sF @ 23.98
Audio Outputs
AES: Four outputs
•
Signal type – unbalanced: AES-3id-2001
•
Common mode range: N/A
•
Sampling rate: 48 kHz
•
Resolution: 20- or 24-bit
•
Output return loss: >15 dB (100 kHz to 12 MHz)
•
Input impedance: 75Ω
•
Connector type: BNC
The 8925DMB-U is a compact SD/HD digital
audio de-embedder (audio demultiplexer)
module. It provides four unbalanced AES
outputs and supports both PCM audio and
Dolby E. This module is ideal for building dense
audio/video infrastructure for production and
playout applications.
The 8925DMB-U also provides four SD/HD-SDI
outputs, one of which is a direct reclocked
feed of the input. The four AES outputs are
synchronous to the video. Output PCM audio
sample resolution can be forced to 20 or 24
bits.
With its fiber-ready architecture, the
8925DMB-U can be configured to support up
to two fiber inputs or up to two fiber outputs.
Configured as a fiber transceiver it can take SDI
from fiber, de-embed audio, and provides SDI
output over fiber and discrete AES outputs. The
dual-receiver option makes it ideal for receiving
incoming feeds from longer distances with fiber
input selection, and locally de-embedding audio
for providing audio and SDI over copper.
SD/HD
Fiber RX
Optical In
Option
Fiber RX
2X SD/HD
Optical In
Fiber RX
Equalizer and
SD/HD
SDI In
Video Outputs
SD/HD-SDI: Four outputs
• Return loss: >15 dB, 5 to 270 MHz;
>15 dB typical, to 1.5 GHz
• Signal level: SDI 800 mVp-p ±10%
• Rise/fall time (20-80%): 140 ps typical for HD,
640 ps typical for SD
•
Output jitter, low jitter applied:
< 0.2 UI HD > 100 kHz
< 1.0 UI HD 10 Hz > 100 kHz
< 0.2 UI SD > 1 kHz
< 0.2 UI SD 10 Hz > 1 kHz
Optical: Single-mode (optional)
Electrical Length (delay)
SDI: HD input <400 ns, SD input <1.2 µs
AES (@48 kHz): HD input 0.41 ms, SD input 0.83 ms
De-Embedding
Output audio stream: Silence or any embedded pair
Output audio resolution: 20-, 24-bit, or auto as input
8900UVF-R
J1
Audio
Output
J3
Audio
Output
J5
SD/HD
SDI Out
SD/HD
J7
SDI Out
Reclocked
Output
J9
SD/HD
SDI In
All parameters can be adjusted via standard
HTML Web browsers or via the Newton Control.
In addition, NetConfig and NetCentral can be
used for remote configuration and SNMP signal
health monitoring.
Option
Fiber TX
Only one fiber
Option
option may be
Fiber TX
selected
Fiber TX
DMUX
Reclocker
Ordering Information
This module can be mounted in a GeckoFlex
frame but not in other 8900 series frames,
including Gecko-A or Gecko-V frames. As this
module has no card-edge controls, an 8900NET
(Net Card) Network Interface card is required to
configure this module.
8925DMB-U
SD/HD de-embedder, front and rear modules, four
unbalanced audio inputs, front and rear module set
SFP-13103G-M1TRX
Fiber transceiver. Low-power 1310 nm single-mode
optical transceiver
SFP-13103G-M1DTX
Dual fiber transmitter. Dual low-power 1310 nm single-
mode optical transmitter
SFP-13103G-M1DRX
Dual fiber receiver. Dual low-power 1310 nm single-
mode optical receiver
For detailed specifications, installation, and setup
instructions see:
www.grassvalley.com/docs/modular
19
J2
Audio
Output
J4
Audio
Output
J6
SD/HD
SDI Out
J8
SD/HD
SDI Out
Fiber In/Out
Connector
FIBER
SD/HD
Optical Out
2X SD/HD
Optical Out
SD/HD
Reclocked
SDI Out
3X SD/HD
SDI Out
4X
AES
Out
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