Linear Acoustic LA-5300 Manuel utilisateur
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Linear Acoustic LA-5300
Broadcast Audio Processor
Preliminary Quick Start Guide
Introduction
The roll-out of ATSC 3.0 presents a unique set of requirements and opportunities for
television broadcasters, including many enhanced audio capabilities. The Linear
Acoustic LA-5300 provides a single 1RU solution for audio loudness control,
upmixing, AC-4 decoding for watermarking, bitstream analysis, and monitoring,
transcoding of Dolby® Digital and Dolby Digital Plus sources to AC-4, as well as
Dolby AC-4 encoding of PCM. As ATSC 3.0 adoption grows, support for additional
features including immersive and object-based audio, interactive consumer control,
personalized audio, and multiple presentations within a single stream will be
incorporated into the LA-5300 via software updates.
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Hardware
LA-5300 Front Panel
Figure 1: Front panel
The front panel of the LA-5300 includes the following:
•Reset button for restarting the unit from the front panel (1A)
•Four status LEDs indicating the status of each power supply (1B, 1C), the
overall status of the unit (1D), and sync for the reference clock (1E)
•A color LCD display to show status and basic configuration parameters (1F)
•A five-button navigation cluster with Left, Right, Up, and Down arrows plus a
green “OK” button (1G)
•A USB port used for software updates (1H).
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LA-5300 Rear Panel
Figure 2: Rear panel
The rear panel includes the following connections:
•Two RJ-45 Gigabit Ethernet connections, one for network remote control (2A)
and one for AES67 I/O (2B)
•Two independent 3Gb/s HD/SD-SDI inputs and outputs (2C) on female BNC
connectors
•Quad-Link SDI or MADI I/O (2D) - optional
•Five AES-3 I/O connections (2E) on female BNC connectors
•Parallel GPI/O control port (female DB-15) for five inputs and five outputs (2F)
•Two IEC power inlets for the redundant internal universal auto-ranging power
supplies (2G)
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Installation and Initial Setup
Installation
LA-5300 is a 1RU product intended to be permanently installed in standard 19 ½”
equipment rack and secured with four standard rack screws. LA-5300 is fan cooled
with air intakes and exhausts located on the side of the unit just behind the front
panel, but whenever possible, it is recommended to leave 1RU of empty space above
and below the unit.
Power
Plug the supplied IEC power cords into the LA-5300 and connect each to different
mains power sources. Remember that while redundant supplies do protect against
the unit losing power in the event of a PSU failure, the loss of mains supply voltage is
a bigger concern. Accordingly, each supply should be fed from a different circuit
equipped with adequate surge protection and fitted with an uninterruptable power
supply (UPS).
Boot Up and Splash Screen
The unit will power up as soon as the power cords are connected, and using the
Reset button (A) is not required on initial startup. The front panel of the unit will
remain dark during most of the boot process but the Status LED (D) will light. Once
the boot process is complete, the Home Screen will appear and the Status LED will
turn green.
Setting IP Addresses
LA-5300 ships with DHCP enabled and will automatically retrieve an IP address
when connected to a network with a DHCP server.
Important!
Both the Control and AES67 connections must be connected to
1000BASE-T (Gigabit) switch ports but should not be connected to a
common network with the same netmask/subnet. If both connections
must be on a common network, make the connection to the AES67 port
and set the values of each Control port field to 0.0.0.0.
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To set a fixed IP address for the Control port:
•Press the Right button once to show the Information screen and once more to
navigate to the IP Configuration (Control) screen
•Press the Down button to highlight “Edit”
•Press the OK button to highlight “Use DHCP”
•Press the Right button to highlight “Yes”
•Press the Up/Down buttons to select “No”
•Press the Left button to highlight “DHCP” again
•Press the Down button to highlight “Address”
•Press the Right button to move to the first digit of the IP address
•Use the Up/Down buttons to change the value
•Use the Right/Left buttons to select another digit to edit
•When finished editing the Address field, press the Right/Left buttons to
highlight “Address” again
•Press the Down button to navigate to the “Netmask” field, following the
instructions above for entering the value
•When finished editing the Netmask field, press the Right/Left buttons to
highlight “Netmask” again
•Press the Down button to navigate to the “Gateway” field, following the
instructions above for entering the value
•When finished editing the Gateway field, press the Right/Left buttons to
highlight “Gateway” again
•Press the Down button to highlight “Update”
•Verify the information has been entered correctly and press the OK button to
save the new values
•If you notice incorrect information and need to start over, use the Right button
to highlight “Cancel” followed by the OK button
If you are using AES67 I/O, pressing the Right button from the IP Configuration
(Control) screen will bring you to the IP Configuration (AES67) screen. The steps for
configuring this port are identical to those above for the Control port.
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Connecting to the Web-Based User Interface
No special client software is required to remotely connect to the LA-5300, and the
HTML-5-based GUI is device, operating system, and browser agnostic. We
recommend Google Chrome, Firefox, or Apple Safari. The computer or tablet should
be on the same network and subnet as the LA-5300.
Once both LA-5300 and your computer are connected to your network, enter the IP
address of the LA-5300 in the URL field of your browser. Once connected, the Home
screen will appear.
Figure 3: Home screen
Clicking on the LA-5300 logo (3A) will always bring you back to the Home screen.
To log in to the unit, click the Log In button (3B). Individual user accounts and
passwords will be supported in a future software version.
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Input and Output Routing
Initial I/O Setup
Once logged in, click on the I/O menu (4A). Choose between SDI/AES-3/MADI or
AES67 inputs and outputs in the Workflow menu (4B). Select between viewing
Program (processed) and Passthrough (unprocessed) routing with the
Program/Passthrough switch (4C).
Figure 4: I/O menu
Routing audio into the LA-5300 is a two-step process. The first step is creating an
input group from the available physical hardware inputs. The second step is
routing the audio from these inputs to the program (processor) input.
Creating an Input Group
Click on your first audio input source (5A) to highlight it, then right click and select
“Create Input Group.” You may enter a custom name for this source in the Label
field (5C) and customize the color of the graphical routing lines (5B).
Click the Save button (5D) to save the configuration or the Cancel button (5E) if
you need to start over without saving your configuration.
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Figure 5: Creating the input group.
Routing Audio to the Program Input
After saving the input group, it is necessary to first set the priority of the input
source by dragging the input audio lines (6A) and then clicking when the desired
priority level (6B) is highlighted. The LA-5300 will look for audio first on inputs
connected to Priority 1. If no signal is present, it will look to subsequent priorities in
order.
Figure 6: Setting priority.
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Next, choose input signal type (PCM, DD+, or AC-4) from the Type dropdown menu
(7A).
Figure 7: Input signal type.
To edit or delete a group, highlight then right click on the colored Edit rectangle
(8A).
Figure 8: Editing or deleting input group.
Creating an Output Group
The steps for creating an output group are identical to creating an input group, but
with the Outputs menu.
Routing Audio to the Program Output
Once the first output group has been created and saved, drag the output audio
lines from the group to the desired program output, then click to save.
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Clock Reference
Setting the Clock Reference
Click on the Clock menu (9A). Use the dropdown menus to choose a Primary
Reference Clock and a Secondary Reference Clock (9C) and, if needed, a VRef
clock source (9E) The status of the selected Primary and Secondary Reference
Clocks is shown to the right of the dropdown menu (9D). The status of the clock is
shown for each input (9B) along with the format, resolution, and frame rate for SDI
sources.
The absence or presence of a signal for each input type is shown in the Input Status
section (9B).
Figure 9: Setting the clock reference.
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