Specifications
Ordering Information
19
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
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
•
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
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
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.
8900UVF-R
J1
J2
J3
J4
J5
J6
J7
J8
J9
FIBER
Audio
Output
Audio
Output
SD/HD
SDI Out
SD/HD
SDI Out
Reclocked
Output
SD/HD
SDI In
Audio
Output
Audio
Output
SD/HD
SDI Out
SD/HD
SDI Out
Fiber In/Out
Connector
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.
4X
AES
Out
3X SD/HD
SDI Out
SD/HD
Reclocked
SDI Out
SD/HD
SDI In
Equalizer and
Reclocker
Only one fiber
option may be
selected
Fiber TX
Fiber TX
Fiber TX
Fiber RX
Fiber RX
Fiber RX
SD/HD
Optical In
2X SD/HD
Optical In
SD/HD
Optical Out
2X SD/HD
Optical Out
Option
Option
Option
DMUX
