Grass Valley Audio Bridge Terminal 2014 - Manual (Page 15)

5
Audio Bridge Terminal
Guide to Installation and Operation
Controls
The RESET button is located on the right-hand side of the ABT rear panel.
Push the RESET button to reset the ABT's IP address to a default value:
This simplifies the process of connecting to the ABT via its Ethernet connection. The
process is described in more detail in
Web Interface , on page 6.
Operation
Synchronization
An external reference signal is required to synchronize the SDTI outputs. An analog video
reference signal, word clock or AES-75 signal can be connected to one of the REFERENCE
SIGNAL connectors. If the loop-through is not used, a 75
termination on the other
REFERENCE SIGNAL connector must be used to properly terminate the line.
For an Audio Bridge Terminal with an AES breakout panel, AES INPUT 1 can also be used for
synchronization. This input signal must be error-free PCM audio sampled at 48 kHz. In the
case where both REFERENCE SIGNAL and AES INPUT 1 have valid references, the signal
connected to REFERENCE SIGNAL has priority.
SDTI Link
The two SDTI outputs are identical, each including signals from all inputs. Each SDTI output
can be connected to a multiviewer SDTI input or to a specific SDTI de-multiplexer.
Depending on the number of input connections available, this link transports up to 128
channels of audio. The SDTI streams transport the current IP address of the Audio Bridge
Terminal to the receiver. The connection via TCP/IP will give access to the different
parameters and status.
Audio Inputs
Analog Audio Inputs
The analog channels pass through analog to digital converters with 24 bit resolution and a
48 kHz sample rate. To compensate the level of the analog signal, the 0 dBFS value may be
set from +24 dBu to -7 dBu for each channel through the Web page interface.
Digital Audio Inputs
The ABT operates on at 48 kHz-sampled audio signals, and inputs at different sampling
rates may not be processed satisfactorily. The validity, user and channel status bits are
transmitted alongside the PCM samples. The input error status detected by the digital input
IP address 10.0.3.190
Subnet mask 255.255.0.0
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