lake LMX 88-LMX 48 Audio System Processor Instruction Manual

lake LMX 88-LMX 48 Audio System Processor

Product Information

Specifications

• Model: LMX 88/LMX 48
• Type: Audio System Processor
• Application: System Control in High-Performance Applications

Product Usage Instructions

1. Product Overview

Front Panel Overview

The front panel of the LMX 88/LMX 48 provides access to essential controls and indicators for easy operation.

Back Panel Overview

The back panel includes input and output connections for integrating the audio system processor into your setup.

2. Important Safety Instructions

• Do not remove the top cover or rear section to avoid electric shock.
• Avoid exposing the appliance to rain or moisture to prevent fire or electric shock.
• Service instructions are for qualified personnel only.
• Refer to the information on the exterior of the bottom enclosure for electrical and safety details.

3. Application Guide

Gain Structure

Understand the gain structure to optimize audio performance and prevent distortion.

Gain / Level Optimization

Adjust gain levels for optimal audio output without introducing noise.

Digital Audio Connections

Utilize digital audio connections for high-quality sound transmission.

Digital Clock Configuration

Configure the digital clock settings for synchronization with other audio devices.

4. Maintenance

Regular maintenance ensures the longevity and performance of your audio system processor. Refer to the manual for detailed maintenance procedures.

Frequently Asked Questions

• Q: Can I use the LMX 88/LMX 48 in outdoor environments?
  • A: It is recommended to avoid exposing the appliance to rain or moisture, so outdoor use may not be suitable unless adequately protected from the elements.
• Q: How can I reset the device to factory default settings?
  • A: Refer to the ‘Factory Default Settings’ section in the manual for instructions on resetting the device to its original configuration.

Operation Manual V1.0
LMX 88/LMX 48
Audio System Processor for System Control in High-Performance Applications

3 LMX 88/48 Operation Manual

Important Safety Instructions

Terminals marked with this symbol carry electrical current of sufficient magnitude to constitute risk of electric shock. Use only high-quality professional speaker cables with ¼” TS or twist-locking plugs pre-installed. All other installation or modification should be performed only by qualified personnel.
This symbol, wherever it appears, alerts you to the presence of uninsulated dangerous voltage inside the enclosure – voltage that may be sufficient to constitute a risk of shock.
This symbol, wherever it appears, alerts you to important operating and maintenance instructions in the accompanying literature. Please read the manual.
Caution To reduce the risk of electric shock, do not remove the top cover (or the rear section). No user serviceable parts inside. Refer servicing to qualified personnel.
Caution To reduce the risk of fire or electric shock, do not expose this appliance to rain and moisture. The apparatus shall not be exposed to dripping or splashing liquids and no objects filled with liquids, such as vases, shall be placed on the apparatus.
Caution These service instructions are for use by qualified service personnel only. To reduce the risk of electric shock do not perform any servicing other than that contained in the operation instructions. Repairs have to be performed by qualified service personnel.
Warning Please refer to the information on the exterior of bottom enclosure for electrical and safety information before installing or operating the device.
1. Please read and follow all instructions and warnings. 2. Keep the apparatus away from water (except for outdoor products). 3. Clean only with dry cloth. 4. Do not block ventilation openings. Do not install in a confined space. Install only according to manufacturer’s instructions. 5. Protect the power cord from damage, particularly at plugs and appliance socket. 6. Do not install near any heat sources such as radiators, heat registers, stoves or other apparatus (including amplifiers) that produce heat.

7. Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one wider than the other (only for USA and Canada).

A grounding-type plug has two blades and a third

grounding prong. The wide blade or the third prong are provided for your safety. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet.

8. Protect the power cord from damage, particularly at plugs and appliance socket.

9. Use only attachments and accessories recommended

by the manufacturer.

10. Use only specified carts, stands, tripods, brackets, or tables. Use caution to prevent tip-over when moving the cart/

apparatus combination.

a long period.

11. Unplug during storms, or if not in use for

12. Only use qualified personnel for servicing, especially after damage.

13. The apparatus with protective earthing terminal

shall be connected to a MAINS socket outlet with a protective earthing connection.

14. Where the MAINS plug or an appliance coupler is used as the disconnect device, the disconnect device shall remain readily operable.

15. Avoid installing in confined spaces like bookcases.

16. Do not place naked flame sources, such as lighted

candles, on the apparatus.

17. Operating temperature range 5° to 45°C (41° to 113°F).

LEGAL DISCLAIMER
Music Tribe accepts no liability for any loss which may be suffered by any person who relies either wholly or in part upon any description, photograph, or statement contained herein. Technical specifications, appearances and other information are subject to change without notice. All trademarks are the property of their respective owners. Midas, Klark Teknik, Lab Gruppen, Lake, Tannoy, Turbosound, TC Electronic, TC Helicon, Behringer, Bugera, Aston Microphones and Coolaudio are trademarks or registered trademarks of Music Tribe Global Brands Ltd. © Music Tribe Global Brands Ltd. 2024 All rights reserved.

LIMITED WARRANTY
For the applicable warranty terms and conditions and additional information regarding Music Tribe’s Limited Warranty, please see complete details online at community.musictribe.com/support.

Welcome

1.1 Introduction
Thank you for choosing the Lake LMX Series of Digital Audio Processors. We are confident that you will be pleased with the performance, unique features, configuration flexibility, reliability, and long-term durability offered by this product.
For fast installation and use of this product, your welcome package includes a printed copy of the LMX Series Quick Start & Field Reference Guide which contains the information required to safely install the product and place it in service. Control and editing features are accessible via the front panel interface or preferably via the Lake Controller software, which can be downloaded from either lakeprocessing.com or labgruppen.com.
It is recommended that the Quick Start & Field Reference Guide and all product documentation included with the Lake Controller installer are reviewed to ensure familiarity with the various configuration and control options.
Thank you again for placing your confidence in Lake products.
1.2 Main Features
The LMX Series incorporates a number of sophisticated technologies to ensure the best possible performance and many years of reliable operation. The following section summarizes the benefits of each feature.
1.2.1 Lake processing and controller
LMX Series devices integrate seamlessly into the Lake Processing environment and are accessible via the Lake Controller software v8.1 and later. Processing modules offer precise settings for gain, delay, crossover settings, equalization and limiting. Lake processing features incorporated in each module include Raised Cosine EqualizationTM, linear phase crossovers, and LimiterMaxTM loudspeaker protection. Please refer to the Lake Controller Operation Manual for further information.

1.2.3 Dante Audio Network
LMX Series devices include Dante digital audio networking as standard. Utilizing the latest advances in Ethernet technology, Dante offers simplified system configuration and extremely low latency while delivering very high quality uncompressed digital audio across the Lake network. The ZenTM automatic configuration feature enables plug-and-play setup without third- party DHCP or DNS servers. Dante is compatible with high-bandwidth networks, allowing large numbers of audio channels to be distributed alongside control and analyzer data.
1.2.4 Additional Documentation
This document, the Lake LMX Series Operation Manual, serves as the primary reference source for detailed information on the installation and operation of LMX Series devices. It also provides detailed information on set-up and configuration using the front-panel interface.
If you intend to use the device as part of a networked system, or access features via the Lake Controller, please refer to the various supporting documents which can be located via these methods:
· Start > Programs > Lake Controller > Documentation (after installing Lake Controller software)
· On the downloaded software installer
· Online at https://www.labgruppen.com/downloads

1.2.2 Lake Analyzer Plugin
Lake Controller software provides integration with third-party real-time analyzers, providing simultaneous measurement display and EQ adjustment via the Lake Controller.
Approved analyzers include Rational Acoustics Smaart v9.1, v8, v7, Di, Di2 and SysTune from AMFG, and WaveCapture Live-Capture Light or Live-Capture Pro; additional third-party analyzers may be approved in the future.

13 LMX 88/48 Operation Manual

Installation

2.1 Unpacking

2.2 Mounting

Carefully open the shipping carton and check for any damage to the device or the supplied accessories. Every Lake product is tested and inspected before leaving the factory and should arrive in perfect condition. If any damage is discovered, please notify the shipping company immediately. Only the consignee may initiate a claim with the carrier or their insurers for damage incurred during shipping. Save the carton and packing materials for the carrier’s inspection.
In addition to the Lake LMX Series device, the shipping carton include the following items:
· Lake LMX Series Quick Start & Field Reference Guide
· AC mains lead (IEC power cable) with locking connector
· Rear brackets for additional rack support, with associated mounting hardware
Please keep the original carton and associated packaging to facilitate shipping of the device should the need arise.

Airflow for cooling the device is from front panel intake to rear panel exit. Please ensure that no objects such as rack doors or lids are placed at the front or rear of the rack to ensure that airflow is maximized. These devices have no top or bottom vents and therefore may be stacked directly on top of each other.
Sufficient space should be available at the front of the rack to accommodate the handles, and at the rear to accommodate connectors and cables; allowance must be made for cable or loom bends within a rack.
2.2.1 Rear Mounting
Two rear support brackets along with associated mounting hardware are included with the LMX, as shown in Figure 2.1; it is recommended that these are used wherever possible. Fit the brackets to the vertical rails at the rear of the rack. Figure 2.2 and Figure 2.3 show the fitting options for fixed and removable installation.
The support brackets are reversible and may be fitted to point either to the front or rear of the rack; the orientation used depends on the rack depth and position of the rear rack rails. Two mounting methods are possible; note that the method shown in Figure 2.2 additionally provides extra security against unauthorized removal. For situations where rapid removal and replacement is required, the method shown in Figure 2.3 should be used.

Figure 2.1: Rear support bracket with mounting hardware

Figure 2.2: Rear support bracket mounted with washer for fixed installation and bracket pointing forward

Figure 2.3: Rear support bracket mounted with tube for removable installation (bracket pointing back)

14 LMX 88/48 Operation Manual

2.3 Cooling
The LMX series use a forced air cooling system with airflow from front to rear. To optimize air circulation, ensure that no objects such as rack doors or lids obstructs the front or rear of the rack. Do not attempt to reverse the air flow. A sufficient air supply must be maintained at the front of LMX series devices and there must be ample space for air egress at the rear. Please maintain a cool ambient temperature around the rack, as high temperatures and humidity can significantly affect the expected lifetime of the components.
We recommend that solid blank panels be used to mask unused rack spaces rather than ventilation panels; and that gaps are not left between LMX devices in the rack as this diminishes the effectiveness of forced air cooling.
If one or more LMX series device is to be used in a rack with other equipment, please ensure that this equipment also uses front to rear airflow cooling. Failure to observe this precaution may result in overheating.
LMX Series devices are equipped with a sophisticated temperature sensing system designed to protect them from overheating caused by inadequate ventilation. A warning will be displayed if the temperature exceeds 70°C (158°F), and a temperature fault will occur at 85°C (185°F).
Note The Processor will NOT mute or shutdown when the temperature reaches or exceeds 85°C (185°F), however sustained performance at this temperature cannot be guaranteed.

2.4 Operating Voltage
The LMX Series devices are equipped with dual independent universal power supplies with two separate locking IEC mains inlets, allowing the LMX to be powered by two separate mains sources for redundancy if one mains are lost.
Only one is required to function to power the LMX and the LMX will seamlessly switch between PSUs if one is lost. In the event that mains are lost this can optionally be indicated on the Front panel as well as in the connected Lake Controller.
The label above each IEC connector indicates the AC mains voltage range for which the device is approved.
LMX Series devices utilizes two universal power supplies, and will operate within the range 90-264 V~50-60 Hz : 75 W. If the plug on the IEC cable provided is not appropriate for your country, a locally-sourced IEC cable with the appropriate molded plug should be used. A locking IEC cable is not necessary to power the device, although is essential if locking functionality is required.
Once a suitable AC power supply is connected to either PSU (or both), the device can be turned on using the front panel power button. When the device is turned on, the power button LED changes from red (Standby) to green (Active).
2.5 Grounding
Analog inputs and outputs feature Iso-FloatTM ground isolation, a technology which combines the benefits of transformer-coupled isolation with the advantages of clean, direct-coupled inputs and outputs. This is configurable in groups of four channels.
The audio converters are galvanically isolated, and not connected to the main ground. High-speed transformers and opto-isolators create a barrier between the device and the outside electrical environment.

Note The Iso-Float feature is activated by default, but may be disabled via the Lake Controller software, or via the front panel menu.
Use correctly shielded balanced audio input connections to minimize hum and interference. Please refer to section 6.1.5 for further information.

NEVER disconnect the earth (ground) pin on the mains cable (AC power cord).

15 LMX 88/48 Operation Manual

Product Overview

This chapter provides an overview of key features and functionality. For further information please see chapters 5 to 8 of this Operation Manual.

3.1 Front Panel Overview

(1) (3) (4) (5) (8) (9)

(8) (10)

(11)

(13)

(13) (2)

(6)(7)

(1) (3) (4) (5) (9)

(8) (10) (13)

(12) (11)

(2)

(6) (7)

Figure 3-1: LMX Series Front Panel Overview

The front panel controls are clustered around a daylight readable full color LCD, allowing adjustment and monitoring of some parameters and meters. The two clusters of controls on either side of the LCD include three dedicated function buttons, six dynamic function buttons with embedded LEDs and a rotary data encoder. To the right of these controls is a dynamic illuminated module divider along with input and output mute buttons and level meters.

1. Handles
Two sturdy aluminum handles are integrated into the front panel. The handles should be used when carrying the device, and when fitting into or removing from a rack. Ensure that any door or removable rack front cover has sufficient depth to clear the handles.

2. Standby
LMX Series devices are powered on and placed into standby mode using the left- most button, or via the Lake Controller. Standby mode is not equivalent to turning the device off at the mains power.
Note All audio in and out of the processor is muted when in Standby mode. Network communication remains active to allow the device to be turned on via the Lake Controller.

(13)

(12)

5. Scene
After pressing the SCENE button, the LCD will display the SCENE Preset Recall view. From this, it is possible to recall any of the SCENE presets stored on the device (SCENE presets are stored from the Lake Controller).
In SCENE Preset recall mode the dynamic function buttons are lit when there is a stored SCENE preset that can be recalled. Two pages are displayed, Scene preset 1-5 and on page 2 preset 6-10.
SCENE Preset recall is only available while in MESA mode.

Menu

After pressing the MENU button, the LCD will display the top level menu. In Menu Mode the dynamic function buttons enable access to various information and functionality. Please refer to section 5.4 for further details.
7. Exit
The EXIT button is used primarily while navigating the menu system in Menu Mode; pressing EXIT will return the menu up one level, pressing and holding will return to Meter view. In Scene Mode, pressing EXIT returns the metering display to the default Home View.

3. Primary RJ45 Socket for Dante connection and control, this is connected to an internal switch and can be used to easily connect to the LMX. When the device has Dual Redundancy enabled, this is for the Primary network.
4. Secondary RJ45 socket for Dante connection and Control, this is connected to an internal switch and can be used to easily connect to the LMX. When the device has Dual Redundancy enabled, this is for the Secondary network.

8. Dynamic Function Buttons with LEDs
The function of these buttons changes according to the currently selected view or menu.
All six LEDs will flash white simultaneously and then stay white to indicate that the frame is selected in the Lake Controller, or flashes white to indicate communication from the Lake Controller.
All six LEDs will also flash simultaneously to indicate frame faults (red) or warnings (yellow).
When a System recall, firmware update or any other lengthy operation is done, the corner LEDs will cycle in yellow and there is a “Please wait” indication displayed on the display.
Please refer to chapter 5 for further details.

16 LMX 88/48 Operation Manual

Display

12. Module Input / Output Mute Buttons and LED Meters

The full color IPS display illuminates when the device is on. The LCD, function buttons, and the rotary encoder provide real-time control and monitoring of the parameters that are useful to have front panel access to, such as IsoFloat or Termination control etc. The LEDs embedded in the function buttons indicate available menu options, provide confirmation of Controller communication, and indicate various faults and warnings.
Available settings are displayed in blue, and enabled settings are displayed in amber.
The selection of the parameters is done with the function buttons, and then the settings is altered with the rotary encoder.
The brightness and contrast of the display and front panel LEDs can be adjusted via the front panel menu. The default Meter view display, Frame Label, Module Labels, Module Input meter, Module Output meter and Gain Reduction. If any Fault or Warning is present, this will also be displayed in full in the top right corner.
Please refer to chapter 5 for further details.
10. Rotary Encoder
The rotary encoder is used to modify the parameters via the menu. When a menu item is selected that permits adjustment of parameter values, the ring around the rotary encoder illuminates.

Independent mute buttons and LED meters are provided for the Module inputs and outputs.
The LED meters for each channel are split into five segments: The bottom three segments (green) indicate signal; the 4th segment (yellow) indicates signal 2 dB below clipping; and the 5th segment (red) indicates signal clipping.
The embedded LED in each mute button confirms whether the associated Module input/s or output/s are muted (red), unmuted (white), or unused (not illuminated).
Please refer to section 5.7 for further information.
13. Dust Filters
Always ensure that the dust filters behind the detachable front panel are clean to ensure maximum airflow.
On the LMX88 two dust filters are positioned behind the magnetically attached metal dust filter covers. To remove the covers gently bend them from the side cutouts behind the handles. Once detached the foam dust filters can be removed for cleaning. Clean the filters using a vacuum cleaner or by gently shaking them. The filters can be fitted by reversing the removal procedure. Do not use the LMX88 while the filters are removed.

11. Dynamic Illuminated I/O Dividers
In Mesa mode, there is an illuminated divider between module inputs to the left and module outputs to the right. In Contour mode the Module Inputs and Module Outputs are together with an illuminated divider between each module.

On the LMX48 the air intakes are located behind the handles, with the dust filters on either side. To clean use a vacuum cleaner directly onto the intake. Do not have the LMX48 powered on while cleaning the filters.

3.2 Back Panel Overview

3.2.1 LMX48

(14)

(15)

(15) (18) (19) (20)

Figure 3-2: LMX48 Rear Panel Overview

(17) (21) (22) (23)

14. AES3/Analog Outputs
AES3 and Analog outputs are provided via standard XLR3M connections, which are shared and can be configured to be either analog or AES3 from the Lake Controller. The eight analog outputs are electronically balanced and feature Lake Iso-Float circuitry; it is not recommended to use unbalanced connections. The output impedance is 50 ohms, providing a maximum output level of +21 dBu. Please refer to section 6.1 for further information. AES3 outputs are available in pairs on the odd numbered output sockets. Please refer to section 6.1.2 and 6.2.1 for further information.
15. AES3 / Analog Inputs (shared)
AES3 and Analog inputs are provided via standard XLR3F latching connectors, which are shared, the LMX48 can sense which type of input is being used. The four analog inputs are electronically balanced and feature Lake Iso-Float circuitry; it is not recommended to use unbalanced connections. The impedance is 20 kohms (balanced), and the inputs can accept a maximum input level of +26 dBu. Please refer to section 6.1.1 and 6.2.1 for further information. AES3 inputs are available in pairs on the odd numbered sockets, with termination available per pair. Please refer to section 6.1.1 and 6.2.1 for further information.

16. Word Clock Input
A female BNC socket is provided to synchronize to other devices using an external word clock signal. Termination can be selected from the front panel or from Lake Controller. Please refer to section 6.3.1 for further information.

Work Clock Output

Any of the onboard clock signals can be sent on the word clock output at any sample rate. Please refer to section 6.3.2 for further information.
18. AES50 Input / Output
Any of the available 96 channels of AES50 input from interface A and B can be assigned to the 24 channels of AES50 receivers which then are used in the Input router AES50 outputs are configured to the 24 AES50 Transmitters in the Output Router and then in the AES50 Configuration the AES50 Transmitters are patched out on the AES50 Interface and channel. It is recommended that Shielded Twisted Pair (STP) cables are used. STP cable has the added advantage of a foil or braided shield that guards the cable against electromagnetic interference. A good foil or braided shield and correctly connected shielded plugs and shells also helps protect against Electrostatic discharge (ESD) that can be the cause of dropouts on AES50 connections.

17 LMX 88/48 Operation Manual

GPI Connector

An RJ45 GPI (General Purpose Input) connection is provided to enable integration with external systems such as alarm/fire systems, providing basic control of power state, change input router settings, scene preset recall, frame preset recall and mute. Please refer to sections 6.6 for further details.
20. Mains Power Connectors
Two universal power supplies capable of accepting 90-264 V ~ 50-60 Hz are built into LMX Series devices, with two inlets for added redundancy mission in critical situations. The IEC power cable provided includes a locking feature via a pin on the bottom of the connector; the connectors can accept standard or locking IEC power cables.
The power supply must be connected to AC mains using a power cable with a correctly wired plug for the country of operation.
LMX devices can be configured to show a mains warning if mains are not present on both inputs. This is disabled by default to allow an LMX device to be fed by a single mains supply. This can be configured from the front panel or by using the Lake Controller software.
21. Primary Network Connector
Primary RJ45 connections provide integration into an Ethernet control network which may include other Lake Processors and the Lake Controller software. Network connection permits full control of all functions along with realtime metering from a remote position. This device supports the Dante audio networking protocol, which allows transmission of multichannel, high- definition digital audio over the same Ethernet connection, and the AES67 protocol when AES67 mode enabled.
Use the primary connector when using a star network topology, consisting of individual Cat-5e connections between the devices and an Ethernet switch. Alternatively, this connection can be used to daisy chain directly to another Lake Processor. The daisy chain topology should not be used with Dante.

For a technical reference of the Ethernet Port, please refer to section 6.4. Additional information is available in the Lake Network Configuration Guide. If the LMX devices have Dante dual redundancy disabled all five ethernet ports (three on the back and two on the front) will work in the same way.
Note The Ethernet ports automatically switch to operate at Ethernet data rates of 100 Mbps or 1000 Mbps and allow straight or crossed network cables. Two LEDs above each port indicate valid network connection (LINK) and network activity (ACT).
22. Secondary Connector
The secondary network connectors can be used to daisy-chain multiple LMX and/ or other Lake devices. Alternatively, Dante dual redundancy can be enabled, and the ports labelled as primary and secondary will be set up as two separate VLANs, by connecting all secondary network connectors to a separate Ethernet switch, ensuring full redundancy in the event of a network component failure.
Note Additional processor configuration is required for a dual redundant network setup. See the Lake Controller Operation Manual for further details.
For a technical reference of the Ethernet Port, please refer to section 6.4. Additional information is available in the Lake Network Configuration Guide.
Note When connecting multiple devices to an Ethernet network, care must be taken NOT to create a closed loop which causes network malfunction.
23. Primary Network Connector with PoE+ out
Extra Primary RJ45 connector. The primary port marked PoE can have Power over Ethernet enabled (PoE+ 802.3at) which can deliver up to 25 W to power external equipment, such as a wireless accesspoint. This can be configured in the Lake Controller software or from the Front panel, and can be set to continue providing power when the LMX device is in Standby mode. Please note that additional filtering will need to be configured in the access point if Dante Multicast is being used on the network.

3.2.2 LMX 88 (14)

(15)

(16) (17)(18) (19)

(20)
Figure 3-3: LMX88 Rear Panel Overview
14. Analog Inputs
Analog inputs are provided via standard XLR3F latching connectors. The eight analog inputs are electronically balanced and feature Lake Iso-Float circuitry; it is not recommended to use unbalanced connections. The impedance is 20 kohms (balanced), and the inputs can accept a maximum input level of +26 dBu. Please refer to section 6.1 for further information.
15. AES3 Inputs
Eight AES3 inputs are available in pairs on four standard XLR3F latching connectors. Please refer to section 6.2 for further information.

(21)

(22) (23) (24)

(25)

16. AES50 Input / Output
Any of the available 96 channels of AES50 input from interface A and B can be assigned to one of the LMX series input modules. AES50 outputs can be used in place of DANTE, AES3 or analog if required. It is recommended that Shielded Twisted Pair (STP) cables are used. STP cable has the added advantage of a foil or braided shield that guards the cable against electromagnetic interference. A good foil or braided shield and correctly connected shielded plugs and shells also helps protect against Electrostatic discharge (ESD) that can be the cause of dropouts on AES50 connections. Please refer to section 6.5 for further information.

18 LMX 88/48 Operation Manual

17. GPI Connector

23. Secondary Connector

An RJ45 GPI (General Purpose Input) connection is provided to enable integration with external systems such as alarm/fire systems, providing basic control of power state, change input router settings, scene preset recall, frame preset recall and mute. Please refer to sections 6.6 for further details.
18. Word Clock Input
A female BNC socket is provided to synchronize to other devices using an external word clock signal. Termination can be selected from the front panel or from Lake Controller. Please refer to section 6.3 for further information.
19. Work Clock Output

The secondary network connectors can be used to daisy-chain multiple LMX and/or other Lake devices. Alternatively, Dante dual redundancy can be enabled, and the ports labelled as primary and secondary will be set up as two separate VLANs, by connecting all secondary network connectors to a separate Ethernet switch, ensuring full redundancy in the event of a network component failure.
Note Additional processor configuration is required for a dual redundant network setup. See the Lake Controller Operation Manual for further details.
For a technical reference of the Ethernet Port, please refer to section 6.4. Additional information is available in the Lake Network Configuration Guide.

Any of the onboard clock signals can be sent on the word clock output at any sample rate. Please refer to section 6.3 for further information.
20. Analog Outputs

Note When connecting multiple devices to an Ethernet network, care must be taken NOT to create a closed loop which causes network malfunction.

Analog outputs are provided via standard XLR3M connections. The eight analog outputs are electronically balanced and feature Lake Iso-Float circuitry; it is not recommended to use unbalanced connections. The output impedance is 50 ohms, providing a maximum output level of +21 dBu. Please refer to section 6.1 for further information.
21. AES3 Outputs
AES3 outputs are available in pairs on standard XLR3M connections. Please refer to section 6.2 for further information.
22. Primary Network Connector
Primary RJ45 connections provide integration into an Ethernet control network which may include other Lake Processors and the Lake Controller software. Network connection permits full control of all functions along with realtime metering from a remote position. This device supports the Dante audio networking protocol, which allows transmission of multichannel, high- definition digital audio over the same Ethernet connection, and the AES67 protocol.
Use the primary connector when using a star network topology, consisting of individual Cat-5e connections between the devices and an Ethernet switch. Alternatively, this connection can be used to daisy chain directly to another Lake Processor. The daisy chain topology should not be used with Dante.
For a technical reference of the Ethernet Port, please refer to section 6.4. Additional information is available in the Lake Network Configuration Guide. If the LMX devices have Dante dual redundancy disabled, all five ethernet ports (three on the back and two on the front) will work in the same way.

24. Primary Network Connector with PoE+ out
Extra Primary RJ45 connector. The primary port marked PoE can have Power over Ethernet enabled (PoE+ 802.3at) which can deliver up to 25 W to power external equipment, such as a wireless accesspoint. This can be configured in the Lake Controller software or from the Front panel, and can be set to continue providing power when the LMX device is in Standby mode. Please note that additional filtering will need to be configured in the access point if Dante Multicast is being used on the network.
25. Mains Power Connectors
Two universal power supplies capable of accepting 90-264 V ~ 50-60 Hz are built into LMX Series devices, with two inlets for added redundancy in critical situations. The IEC power cable provided includes a locking feature via a pin on the bottom of the connector; the connectors can accept standard or locking IEC power cables.
The power supply must be connected to AC mains using a power cable with a correctly wired plug for the country of operation.
LMX devices can be configured to show a mains warning if mains is not present on both inputs. This is disabled by default to allow an LMX device to be fed by a single mains supply. This can be configured from the front panel or by using the Lake Controller software. Please refer to section 6.7 for further information.

Note The Ethernet ports automatically switch to operate at Ethernet data rates of 100 Mbps or 1000 Mbps and allow straight or crossed network cables. Two LEDs above each port indicate valid network connection (LINK) and network activity (ACT).

19 LMX 88/48 Operation Manual

Signal Flow and Lake Processing

4.1 Signal Flow
The figures below depict the audio signal flow for LMX Series devices configured in Contour mode, Mesa modes or a combination of both in Contour/Mesa mode. It is worth noting that this sophisticated device provides up to five points in the signal chain where the signal level can be adjusted, muted or disconnected (depending on whether configured in Contour Mode, Mesa Mode or Contour/Mesa Mode as described below). The blue sections represent Frame data, and the red sections represent Module data – please refer to the Lake Controller Operation Manual for further information. How to change mode is described in section 5.9.2.2.
Important information regarding correct setting of the gain structure can be found in section 8.1.

LMX 88
Analog 1-8 AES3 1-8 Dante 1-8 AES50 1-96

Module Input Section

LMX 48

Analog 1-4*

Input Mixer A

Gain Polarity / Mute

EQ

Delay

AES3 1-4*

Input

Dante 1-8 AES50 1-96

Routers 1-16

*shared connectors

WITH

INPUT

MUTES

Input Mixer B

Gain Polarity / Mute

EQ

Delay

Module Input Section

Input Mixer C

Gain Polarity / Mute

EQ

Delay

Input Mixer D

Gain Polarity / Mute

EQ

Delay

Crossovers Output Routing

Crossovers

Module Output Section

EQ

Gain / Delay Polarity / Mute

LimiterMax RMS / Peak

EQ

Gain / Delay Polarity / Mute

LimiterMax RMS / Peak

EQ

Gain / Delay Polarity / Mute

LimiterMax RMS / Peak

EQ

Gain / Delay Polarity / Mute

LimiterMax RMS / Peak

EQ

Gain / Delay Polarity / Mute

LimiterMax RMS / Peak

EQ

Gain / Delay Polarity / Mute

LimiterMax RMS / Peak

Module Output Section

EQ

Gain / Delay Polarity / Mute

LimiterMax RMS / Peak

EQ

Gain / Delay Polarity / Mute

LimiterMax RMS / Peak

EQ

Gain / Delay Polarity / Mute

LimiterMax RMS / Peak

EQ

Gain / Delay Polarity / Mute

LimiterMax RMS / Peak

EQ

Gain / Delay Polarity / Mute

LimiterMax RMS / Peak

EQ

Gain / Delay Polarity / Mute

LimiterMax RMS / Peak

LMX 88
Analog 1-8 AES3 1-8 Dante 1-8 AES50 1-96
LMX 48
Analog 1-8 AES3 1-8 Dante 1-8 AES50 1-96 *shared connectors

Pass-thru from Input Router to Output Router (NO MUTES)
Figure 4-1: LMX Series Signal Flow (Contour Mode)

LMX 88 – INPUTS
Analog 1,2, -8 AES 3, -8 Dante 1-8 AES50 Receivers 1-24
LMX 48 – INPUTS
Analog -4 AES -8 Dante 1-8 AES50 Receivers 1-24 *shared connectors

20 LMX 88/48 Operation Manual

Module Input Section

Module Output Section

LMX 88
Analog 1-8 AES3 1-8 Dante 1-8 AES50 1-96

LMX 48
Analog 1-4 AES3 1-4 Dante 1-8 AES50 1-96 *shared connectors

Input Routers
1-16
WITH INPUT MUTES

Input Mixer A

Gain Polarity / Mute

EQ

Delay

HPF/LPF

Gain / Delay Polarity / Mute

LimiterMax RMS / Peak

Input Mixer B

Gain Polarity / Mute

EQ

Delay

HPF/LPF

Gain / Delay Polarity / Mute

LimiterMax RMS / Peak

Input Mixer C

Gain Polarity / Mute

EQ

Delay

HPF/LPF

Gain / Delay Polarity / Mute

LimiterMax RMS / Peak

Input Mixer D

Gain Polarity / Mute

EQ

Delay

HPF/LPF

Gain / Delay Polarity / Mute

LimiterMax RMS / Peak

Input Mixer E

Gain Polarity / Mute

EQ

Delay

HPF/LPF

Gain / Delay Polarity / Mute

LimiterMax RMS / Peak

Input Mixer F

Gain Polarity / Mute

EQ

Delay

HPF/LPF

Gain / Delay Polarity / Mute

LimiterMax RMS / Peak

Input Mixer G

Gain Polarity / Mute

EQ

Delay

HPF/LPF

Gain / Delay Polarity / Mute

LimiterMax RMS / Peak

Input Mixer H

Gain Polarity / Mute

EQ

Delay

Pass-thru from Input Router to Output Router (NO MUTES) No Auto

HPF/LPF

Gain / Delay Polarity / Mute

LimiterMax RMS / Peak

LMX 88 – INPUTS
Analog 1,2, -8 AES 3, -8 Dante 1-8 AES50 Receivers 1-24
LMX 48 – INPUTS
Analog -4 AES -8 Dante 1-8 AES50 Receivers 1-24 *shared connectors

Figure 4-2: LMX Series Signal Flow (Mesa Mode)

Output Routing

LMX 88
Analog 1-8 AES3 1-8 Dante 1-8 AES50 1-96
LMX 48
Analog 1-8 AES3 1-8 Dante 1-8 AES50 1-96 *shared connectors

21 LMX 88/48 Operation Manual

LMX 88 Analog 1-8 AES3 1-8 Dante 1-8 AES50 1-96
LMX 48 Analog 1-4 AES3 1-4 Dante 1-8 AES50 1-96 *shared connectors
Input Routers
1-16 WITH INPUT MUTES

Module Input Section

Input Mixer A

Gain Polarity / Mute

EQ

Delay

Input Mixer B

Gain Polarity / Mute

EQ

Delay

Module Output Section

EQ

Gain / Delay Polarity / Mute

LimiterMax RMS / Peak

EQ

Gain / Delay Polarity / Mute

LimiterMax RMS / Peak

EQ

Gain / Delay Polarity / Mute

LimiterMax RMS / Peak

EQ

Gain / Delay Polarity / Mute

LimiterMax RMS / Peak

EQ

Gain / Delay Polarity / Mute

LimiterMax RMS / Peak

EQ

Gain / Delay Polarity / Mute

LimiterMax RMS / Peak

Input Mixer C

Gain Polarity / Mute

EQ

Delay

HPF/LPF

Gain / Delay Polarity / Mute

LimiterMax RMS / Peak

Input Mixer D

Gain Polarity / Mute

EQ

Delay

HPF/LPF

Gain / Delay Polarity / Mute

LimiterMax RMS / Peak

Input Mixer E

Gain Polarity / Mute

EQ

Delay

HPF/LPF

Gain / Delay Polarity / Mute

LimiterMax RMS / Peak

Input Mixer F

Gain Polarity / Mute

EQ

Delay

HPF/LPF

Gain / Delay Polarity / Mute

LimiterMax RMS / Peak

Crossovers Output Routing

LMX 88
Analog 1-8 AES3 1-8 Dante 1-8 AES50 1-96
LMX 48
Analog 1-8 AES3 1-8 Dante 1-8 AES50 1-96 *shared connectors

Pass-thru from Input Router to Output Router (NO MUTES)

LMX 88 – INPUTS
Analog 1,2, -8 AES 3, -8 Dante 1-8 AES50 Receivers 1-24
LMX 48 – INPUTS
Analog -4 AES -8 Dante 1-8 AES50 Receivers 1-24 *shared connectors

Figure 4-3: LMX Series Signal Flow (Contour/Mesa Mode)
Please refer to section 5.9.2.2 for information on changing the Frame configuration between Contour, Mesa or Contour/Mesa Modes.

4.1.1 Level Adjustment and Mute Points

The numbers below correspond the points identified in Figure 4-1, Figure 4-2 and 4-3.

1. Input Router Stage 2. Input Mixer Stage
3. Module Input Stage 4. Module Output Stage 5. Output Router Stage

– Input selection and mute – Router ON/OFF connection to mixer and gain settings and mute – Mute (N/A for Mesa Mode) and gain settings – Mute and gain settings – Output ON/OFF routing connections

Note If the required audio signal is not passing correctly, verify the connection, mute and gain settings at all five stages and power state.

4.2 Lake Processing and Control
As outlined in section 1.2.1, this device integrates seamlessly into the Lake Processing environment, providing all features, functionality and connectivity associated with all Lake Processors. The internal Lake Processing includes programmable crossovers, EQ, dynamics and other functions, and can be fully con- trolled via the supplied Lake Controller software.
The Lake Controller Operation Manual and Lake Network Configuration Guide are available from the Start Menu after software installation.
Visit http://labgruppen.com to download the latest software, firmware and documentation for your devices.

22 LMX 88/48 Operation Manual

4.3 Modules and Frames
4.3.1 Overview
A Frame represents one physical Lake Processor (e.g. LMX 48 or LMX 88). In Contour Mode, a maximum of four Modules are contained within each Frame; these are referred to as Module A to D. The number of Modules shown in a given Frame is also dependent upon the signal processing configuration of that Frame. In Mesa Mode each Frame contains eight Modules labelled A – H.
In Contour Mode, each Module can be configured as a Classic Crossover (Bessel, Butterworth, Linkwitz-Riley), as a Linear Phase Crossover, or as multiple full bandwidth Auxiliary Outputs. The XP module which includes classic crossovers, multiband limiter, FIR and array optimization can also be used. The default configuration for LMX devices is eight Mesa EQ Modules, providing a total of eight Module outputs.
Please refer to the Lake Controller Operation Manual for further information.
4.4 Loudspeaker Processor (Contour Mode) Overview
In Contour Mode, LMX Series devices may be configured with up to four processing Modules containing a total of up to twelve processing Module outputs as shown in Figure 4-1. Each set of processing elements is referred to as a Module and can be configured as crossovers, full-bandwidth auxiliary outputs, or a combination of the two. The relationship between inputs and outputs is defined via the Lake Controller.
The Lake Processing system provides two distinct categories of crossovers:
· Infinite Impulse Response filters (IIR) such as the classic Bessel, Butterworth or Linkwitz-Riley types; these are available with slopes ranging from 6 dB/ octave to 48 dB/octave.
· Finite Impulse Response filters (FIR) providing zero phase shift with steep transition slopes at the crossover frequencies. These are also referred to as Linear Phase Crossovers and are used in different way in the LP, FIR and XP modules.
Further details on these types of crossovers and information on configuring various module types can be found in the Lake Controller Operation Manual.

The device configuration may be changed either via the Front Panel MENU > FRAME > FRAME RESET (refer to section 5.9.2.2) or via the Lake Controller MODULES > I/O CONFIG > FRAME CONFIG menu (refer to the Lake Controller Operation Manual).
4.8 Files and Presets
The Lake system provides various methods for storing and recalling Module, Frame, or system-wide data. An overview is provided below; for further information please refer to the Lake Controller Operation Manual.
4.8.1 Module, System and Sub-System Configuration Files
A Module file is the smallest set of data that can be stored and recalled. It contains crossover, gain, delay and limiter information for each individual (i.e. the data shown in red in the signal flow diagrams in section 4.1). A Module file may be recalled into other Lake devices. It is not possible to store a Module File directly on the hardware device. The speaker presets included in the Lake Load Library are Module Files.
A System or Sub-System Configuration File contains a set of Module file information in addition to Frame related information such Group data, I/O configuration and other settings (i.e. the data shown in blue in the signal flow diagrams in section 4.1), except all the settings available under Technical Data in the Lake Controller, such as IP settings. For LMX series devices the Scene presets are also included in the System file. Storing a System file will store the complete system as it is in the work area. Recalling a previous System file allows access to a previous system configuration. The Recall Last System Configuration option when Lake Controller is started will perform a Recall Compare and will not push any settings to online frames.
4.8.2 Scene Presets
A Scene Preset is stored on the device, but also stored in the Lake System File as the scenes are set up to match the specific system, therefore making it easy to perform a Frame Replace and all Scene presets stored will follow to the new destination device. The Scene presets include all settings for Dante receivers, all priorities for the input routers and the input mixer settings for all modules. This enables quick changes to the inputs used for the LMX modules or output routes set from the Input router.

4.5 System Equalizer (Mesa Mode) Overview
In Mesa Mode, default configuration, an LMX Series device provides eight processing Modules with independent EQ, HPF/LPF, Gain, Polarity, Delay and Limiters as shown in Figure 4-2. The relationship between inputs and outputs is defined via the Lake Controller.
Please refer to the Lake Controller Operation Manual for additional information on Mesa Mode and associated I/O routing.
4.6 Hybrid Configuration Contour/ Mesa Mode Overview
The LMX series offers a hybrid configuration mode (Contour/Mesa) featuring 2 Contour Modules with up to six processing outputs for loudspeaker processing and 4 Mesa Modules with four outputs for system processing as shown in Figure 5-3.
4.7 Switching Between Contour, Mesa, or Countour/Mesa Modes
When switching between Contour, Mesa or Contour/Mesa Modes, all current Frame configuration data is lost including stored Scene Presets (Frame Presets are retained) and the device is completely reconfigured into the selected Mode. Ensure you have stored any existing frame configuration data before configuring into a different mode.

4.8.3 Frame and System Presets
This device allows the complete processor configuration to be stored as a Frame Preset on the hardware unit itself. Presets can be recalled via the front panel (please refer to section 5.9.4) or via the Lake Controller software (please refer to the Lake Controller Operation Manual). Presets can be stored into the device using the Lake Controller or the LMX Series Preset Manager utility.
A maximum of 100 Frame Presets can be stored on this device. The data within a Frame Preset includes the configurations of both Modules in the Frame, including all levels, crossover, EQ, input mixer, output routing, and all other Module, Frame and Group parameters and all stored Scene presets. As Frame Presets are stored in the device, complete processor configurations may be recalled without the need to connect the device to a PC.
Using the System Presets function in the Lake Controller, entire system configurations can be stored and recalled across a network of LMX & other Lake Series devices. This enables fast retrieval and switching of entire system configurations as minimal data is being sent between the Controller and Processors.

23 LMX 88/48 Operation Manual

Front Panel Interface

(1) (3) (4) (5) (8) (9)

(8) (10)

(11)

(1)

(2)

(6)(7)

(12)

(1) (3) (4) (5) (9)

(8) (10) (13)

(11)

(1)

(2)

(6) (7)

(12)

Figure 5-1: Front Panel Interface

5.1 Overview
The front panel interface is framed by two cast aluminum handles (1) and features the On/Standby button (2); the primary and secondary RJ45 sockets for Dante, AES67 and control (3) & (4); the Scene, Menu and Exit buttons (5) to (7); Multi-function buttons (8); display (9); rotary encoder (10); I/O LEDs (11) and Mute buttons (12).
5.1.1 Warning, Fault and Mute Indications
Fault or warning conditions are indicated via flashing the LEDs embedded in the dynamic function buttons around the display; a simultaneous description is shown in the top or bottom right corner of the LCD, according to preference.
Further information on faults and warnings is provided in section 7.1.
5.1.2 Selecting a Module in the Lake Controller Software via the Device
It is sometimes useful to identify which Module icon in the Lake Controller software are associated with a particular hardware Frame. To highlight module A in the Lake Controller software:
Ensure Meter View is selected and press any button adjacent to the LCD.
If the Frame is online, but the Module is not in the work area, the selected Module will be centered on the Module scroll bar (assuming the Modules Menu is selected in the Lake Controller). If the frame is on Workarea, the Module icon label will be highlighted in yellow.
5.2 Power Button (2)
The unit is powered on by pressing the left-most button on the front panel, labelled 2 in Figure 5-1. It has a colored power symbol which illuminates blue when connected to the AC mains and red when the unit is in standby mode. It turns yellow when the button is pressed and green when the processor is on. A subsequent press of this button will turn the color to yellow while pressed and then returns to red when the unit is in standby mode.
5.3 Scene Button
When the device is in Mesa Mode the Scene button is used to enter the Scene preset recall menu. Scene presets can be recalled by pressing the adjasent dynamic function button beside each stored Scene preset position. There are two views, Scene 1-5 and Scene 6-10. The active Scene is indicated with Orange background. Changing settings included in the Scene will make it “dirty” to indicate that it was the last recalled Scene but currently not active. While in Scene menu, it will never time out automatically to Meter view.

5.4 Menu Button
Menu Mode is selected by pressing the MENU button. The screen displays the top-level menu with various submenu options. Press the button adjacent to the required submenu to select it.
Pressing the MENU button while in Menu Mode will display the previous menu level.
Menu Mode is used for processor configuration, or for editing a parameter.
5.5 Exit Button
Pressing Exit steps back one level in the menu hierarchy. Pressing and holding the button returns to Meter View.
5.6 Dynamic Buttons, Controls and LEDs

A

AB

Figure 5-2: LCD with Dynamic Buttons, Controls and LEDs
5.6.1 Select Me (A)
These 6 bright white LED embedded in the dynamic function button around the display together with the Frame Label highlighted in White signifies selection in the Lake Controller, or Controller communication providing visual confirmation of: · Network communication between the Lake Controller and the
Lake Processor (Flashing LED). · Selection of the Lake Processor in the Lake Controller software (Steady LEDs
and White frame label).
Note The LEDs can be dimmed via the front panel by selecting Frame menu, and then Front – Dimming.

24 LMX 88/48 Operation Manual

5.6.2 Fault and Warning LEDs (A)
All LEDs around the display flash red when a Fault is present, and flash yellow when a Warning is present. A detailed description of the actual fault/warning is also displayed in the corner. See also Faults and Warning section.
5.6.3 Rotary Encoder (B)
The rotary encoder is used to adjust parameters in conjunction with the selection made via the dynamic function buttons and LCD menus. The ring around the rotary encoder illuminates when a selected parameter is available for adjustment and illuminates in the color of the selection.
Turn the encoder clockwise to increase the selected parameter, or counterclockwise to decrease the value. Parameters with only two states (e.g. ON, OFF) are toggled by turning clockwise or counter-clockwise.

Some parameters enable simultaneous adjustment of a combination of input and output channels. To select which parameters are adjusted:
· Press the associated soft button/s to select the parameter/s for editing. A selected parameter is indicated by inverse text and background color.
· Use the rotary encoder to change the value.
· It is possible to select multiple parameters for simultaneous editing even if the values are different on each channel.
5.6.4 Dynamic Function Buttons (A)
The buttons surrounding the display are unlabeled because their functions change according to the currently selected menu or display.
In Menu Mode these buttons are used to navigate the menu structure. A white LED illuminates on each button when a valid menu option is available.

5.7 Module I/O Mute Buttons and LED Meters
LMX Series devices provide mute functions at several points in the audio signal path. Please refer to section 4.1 for mute locations and descriptions. Two types of mutes are available from the front panel: 1. Module Input Mutes 2. Module Output Mutes In Home View (default), Module Input and Output Mutes are controlled via the dedicated mute buttons underneath each channel’s five- segment LED meter as shown in Figure 5-3. In Mesa Mode only Module Output Mutes are available.

Figure 5-3: Dedicated Module Input and Output Mutes – Home View

In Figure 5-3, the buttons labelled A & B provide Module input muting; the buttons labelled 1-6 provide Module output muting. The embedded LED in each mute button confirms whether the associated Module input/s or output/s are muted (red), unmuted (white), or unused (not illuminated).

5.7.1 Module Input and Output Mutes
Module input mutes are only available in Contour Mode; Module input mutes are not applicable in Mesa Mode. The quantity and position of the output mute buttons changes depending on whether the device is configured in Contour Mode (up to twelve outputs) or Mesa Mode (eight outputs) as shown in Figure 5-3. The mute state is also indicated in red on the display
Please refer to the Lake Controller Operation Manual for details of Module mute controls via the software.

5.7.2 Clip Indication
The dedicated 5-segment metering LEDs (Figure 5-3) display Module input and output clip or pre-clip conditions. Additionally, the faults and warnings LED described in section 5.1 provides clip warnings for input mutes, or GPI protective mutes, along with confirmation text on the LCD screen.
Clipping is monitored at the following positions in the signal chain:
· Analog Inputs: If the input signal exceeds +26 dBu, a clip indication will be given. This does not apply if digital inputs are selected.
· Module Inputs: If the signal level at this point exceeds +25 dBu, a clip indication will be given.
· Module Outputs: If the signal level at this point exceeds +21 dBu, a clip indication will be given.

25 LMX 88/48 Operation Manual
5.8 Meter Mode
5.8.1 Home View (Contour Mode) Contour Mode is the Meter Mode Home View as shown in Figure 5-5.

5.9 Menu Mode
5.9.1 Overview The front panel allows an overview of some settings. These functions include the ability to recall Frame Presets, configure various parameters such as Mains warning, GPI state, analog input Iso-Float and AES3/Word Clock Termination and view important parameters such as firmware version, MAC address, network mode, FrameID etc., or to perform a reset of the device. Menu Mode can be accessed at any time by pressing the MENU button. After pressing the MENU button, various submenu options are displayed as shown in Figure 5-8.

Figure 5-5: Meter Mode > Home View

5.8.2 Home View (Mesa Mode)
The default view when powering on an LMX Series device configured in Mesa Mode is Meter Mode > Home View as shown in Figure 5-6.

LMX FOH
MODULE INPUTS

MODULE OUTPUTS

Figure 5-8: Menu Mode > Main Menu
Press the illuminated button adjacent to the required option to display an associated submenu. When parameter level is reached, individual parameters may be selected for adjustment by pressing the adjacent button. The selected parameter value/s are highlighted and are adjustable using the rotary encoder.
A parameter may be adjusted simultaneously across multiple channels by selecting all values to be adjusted; any current value offsets are retained. Some parameters default to multiple selection, with all inputs or outputs adjusted simultaneously. Changes are affected in real-time and a stored without further confirmation. Pressing EXIT returns to the previous menu level, automatically retaining any parameter changes.
Note All parameters are also editable via the Lake Controller unless specified otherwise.

PA L PA R SUB L SUB R FILLS L FILLS R DELAY L DELAY R PA L PA R SUB L SUB R FILLS L FILLS R DELAY L DELAY R

Figure 5-6: Meter Mode > Home View (Mesa – Module Outputs)
Home View (Mesa Mode) provides a summary of Module I/O gain level and limiter gain reduction, along with frame, module and channel labeling information.
5.8.3 Home View (Contour/Mesa Mode) Contour / Mesa Mode is shown as in Figure 5-7. Home View (Contour/Mesa Mode) provides a summery of Module I/O gain level and limiter gain reduction, along with frame, module and channel labeling information.

Figure 5-7: Meter Mode > Home View (Contour/Mesa – Module Outputs)

26 LMX 88/48 Operation Manual

5.9.1.1 Menu Structure Overview From the Main Menu, the following submenus are available, as shown in Figure 5-9 and described in the following sections.

Scene Preset

Menu

Meter View (HOME)

Scene Preset Recall

AES/ Word Clock Termination

Iso-Float

Frame

Network

Frame Presets

Mains

Input 1

Input 1-4

Frame Info

Frame Reset

Front

GPI

PoE

Dual Redundancy

Recall

PSU status

Input 2

Input 5-8

Frame Label

Serial Number

Firmware Version

Temperature

Factory Reset

Contrast

PoE

Mains Warnings

Input 3 Input 4

Output 1-4 Output 5-8

Firmware Version

Contour Reset

Dimming

Mesa Reset

Bar placement

In Standby

Word Clock

Contour/Mesa Reset

Confirm Scene Recall

Menu Setting
Figure 5-9: Menu Structure

Confirm Preset Recall

5.9.1.2 AES and Wordclock Termination
MENU > TERMINATION
Menu/Termination
AES In1 (ch 1-2) AES In1 (ch 1-2) Terminated Unterminated Word Clock Unterminated

Figure 5-10: AES Termination Edit Screen

To adjust the AES3 or Word Clock Input Termination, select Termination from the menu then use the rotary encoder to toggle the value.
For fault-free operation when using AES3 digital audio as an input source, inputs must be correctly terminated with the characteristic impedance of 110 ohm. The Input Termination setting is determined by the method used to distribute the AES3 signals.
The processor at the end of a distribution line should be set to TERMINATED; all other processors should be set to UNTERMINATED. If an AES3 distribution amplifier (DA) is being used to distribute the digital audio signals, with one DA output per processor, then all terminations should be on. However, if the AES3 is daisy-chained, only terminate the last processor in the chain. The termination settings are stored as part of the Lake System file.

5.9.1.3 ISO Float MENU > ISO-FLOAT

Menu/ISO-Float
Analog In 1-4 Floating

Analog Out 1-4 Floating
Analog Out 5-8 Grounded

Figure 5-11: Iso-Float Menu
To change the Iso-Float setting, press the desired Inputs or Outputs button, then adjust the value using the rotary encoder.
The analog inputs utilize Iso-Float transformerless electronic balancing circuitry. This provides electrical isolation from an analog source comparable to that achieved with transformer-based designs. However, pin 1 of the XLR input connector may be

connected to ground within the device if desired. This option is selected by using the rotary encoder to toggle between FLOATING and GROUNDED.
It may be necessary to change this setting to resolve ground loop problems when using analog inputs.
Iso-float is available in groups of four channels (1-4, 5-8).

5.9.2 Frame Submenu MENU > FRAME

Menu/Frame/
Frame Info
Front

Frame Reset GPI

Figure 5-12: Frame Menu
The Frame Menu provides information and options relating to the device as a physical unit. It is referred to as a Frame for consistency with Lake Controller terminology.
5.9.2.1 Frame Info
MENU > FRAME > FRAME INFO
Frame Info provides information about the device settings and configuration. All data in this front panel menu is read-only; some parameters are fixed; some can be changed only via the Lake Controller software.
Frame Label
The Frame Label as defined in the Lake Controller is displayed in this menu. It is also displayed at the top-left of the screen in Meter Mode, Home View.
Serial Number (Serial No.)
The printed serial number on the device is also electronically embedded in the hardware and can be seen in the Front panel and Lake Controller software, and therefore cannot be removed or altered if stolen.

27 LMX 88/48 Operation Manual

5.9.2.2 Frame Reset and Configuration

GPI Configuration

MENU > FRAME > FRAME RST
Use this option to display a further menu with options to reset all parameters back to their original factory default values, or to reconfigure the Frame in a different mode (i.e. Contour or Mesa). See section 7.3 for a full list of the default factory reset parameter values.
Four types of resets are provided: Factory Reset, Contour Reset, Mesa Reset and Contour/Mesa Reset.
Factory Reset
A Factory Reset will reset all settings and parameters to the original factorydefined default values. This includes the deletion of any Frame Presets and Scene Presets stored within the device, and the default Mesa mode. It also resets the IP Address mode and all network related settings; a hard power cycle (disconnect from mains and reconnect) is required to complete this reset.
Contour Reset
A Contour Reset will configure the Frame in Contour Loudspeaker Processor Mode (4-in, 12-out) and will reset all settings and parameters to the original factorydefined default values for that configuration including stored Scene presets. Frame Preset and IP / Network configuration will be unaffected. A power cycle is not required to complete this type of reset.

The current state of the four GPI inputs can be seen in the GPI menu view. Configuration of the desired settings for each GPI input can only be carried out using the Lake Controller software.
Table 5-1 lists the options available for General Purpose Input (GPI). These options can be set independently for a transition from closed > open and from open > closed.

Table 5-1: GPI Options Acting on Protective Mute State
Standby State

Transition Option 1. No Action 2. Toggle State 3. Mute 4. Unmute 1. No Action 2. Toggle State 3. Standby 4. Turn On

Mesa Reset

Preset Recall

1. No Action

A Mesa Reset will configure the Frame in Mesa System Processor Mode (8-in, 8-out) and will reset all settings and parameters to the original factorydefined default values for that configuration including stored Scene Presets. Frame Preset and IP / Network configuration will be unaffected. A power cycle is not required to complete this type of reset.

Input Router Configuration

2. Recall #99
3. Recall #100
Configuration for one or more of the input routers.

Contour / Mesa Reset

Scene Preset Recall

1 = No action

A Contour / Mesa Reset will configure the Frame in Contour Loudspeaker Processor Mode and Mesa System Processor mode with 2x Contour Modules and 4x Mesa Modules (8-in, 10-out) and will reset all settings and parameters to the original factory-defined default values for that configuration including stored Scene Presets. Frame Preset and IP / Network configuration will be unaffected. A power cycle is not required to complete this type of reset.

5.9.2.3 GPI MENU > FRAME > GPI

Menu/Frame/GPI

Current state of GPI

GPI 1

GPI 2

Open

Open

GPI 3

GPI 4

Open

Open

No Action

2 = Recall #1 3 = Recall #2 4 = Recall #3 5 = Recall #4 6 = Recall #5 7 = Recall #6 8 = Recall #7 9 = Recall #8 10 = Recall #9 11 = Recall #10 –

Figure 5-13: GPI Menu
Four general purpose inputs are available, whose status can be observed from the front panel.

A change to the `Acting on’ setting takes effect the next time the transition occurs. For example, changing a GPI closed to open transition when the selected GPI is currently open is not executed until the next transition to open.
Note A change in GPI open/closed state occurring when the device is disconnected from power will be acknowledged and executed when power is reconnected.

28 LMX 88/48 Operation Manual

The current state (open/closed) is reported for all GPI settings on the front panel and in the Lake Controller software.

Table 5-2: Default GPI Configuration

GPI #

Default Option

GPI 1

No Action

GPI 2

No Action

GPI 3

No Action

GPI 4

No Action

5.9.3 Front Panel Controls MENU > FRAME > FRONT

Menu/Frame/Front

Dimming
0
Bar Placement
Top GPI 3

Confirm Scene Recall
Off
Confirm Scene Recall
Off GPI 4

Figure 5-14: Front Panel Display Controls Menu
Dimming To adjust the front panel LCD & LED brightness, select this option then use the rotary encoder to change the value. Bar Placement Change if the Frame Label, Faults & Warnings indication and menu tree navigation information bar should be in the top or bottom of display. Confirm Scene Recall Select if a confirm dialog should be displayed before a Scene Preset recall is done. Confirm Select whether a confirm dialog should be displayed before a Frame Preset recall is carried out.

5.9.4 Frame Preset Menu MENU > FRAME PRST
Menu/Frame Preset
Frame Preset Recall
Preset 1.
Recall
Figure 5-15: Frame Preset Menu
To recall an existing Frame Preset, use the rotary encoder to select the required Preset then press the RECALL button to overwrite the current configuration.
Note Frame Presets must initially be created in the Lake Controller and stored as a Preset using the Lake Controller or the lMX Series Preset Manager.
Up to 100 Frame Presets can be stored in the device. The data within a Frame Preset includes the configuration of all Modules in the Frame including input routers, input mixers, levels, crossovers, EQ, and output routing. Frame Presets are stored within the device using the Lake Controller or can be distributed between devices and bank files using the standalone preset manager utility. Complete processor configurations can be recalled without connecting the device to a PC.

29 LMX 88/48 Operation Manual

Back Panel Interface

Figure 6-1: Back Panel Interface (LMX 48)

(1) & (4) (2)

(2)

(5) (7) (8) (9) (13)

(2) & (3) (3)

(6) (10) (11) (12)

(14)

(7)(8) (9) (5)(6) (14)

(1)
Figure 6-1: Back Panel Interface (LMX 88)
6.1 Analog Inputs and Outputs
6.1.1 Analog Input XLR Connections (2)
The LMX88 has eight electronically balanced analog inputs provided by latching 3 pin female XLR sockets. These feature optional Lake iso-float, applicable to channels 1 ­ 4 and channels 5 ­ 8.
The LMX48 has four electronically balanced analog inputs, which are shared with the AES3 inputs. These feature Lake iso-float. The sockets are auto- sensing and connecting an AES3 input will automatically make the socket AES3. When an even socket is used for AES3 the odd socket can still be used for analog input.
The maximum input level accepted by the input pre-amplifiers without clipping is 26 dBu. To enhance its adaptability with a wide range of input signal amplitudes the LMX series utilizes gain-stacking, a technique involving multiple gain stages in its analog to digital converter (ADC). The gain- stacking functionality of the LMX devices involves two parallel converters in the signal path, allowing for a seamless automatic switch between high and low converters on the same ADC IC. This approach not only optimizes the dynamic range of the analog inputs, but also ensures the integrity of the digitalized signal by adapting the gain to the specific requirements of the input signal. This flexibility is particularly valuable in scenarios where signals may vary in amplitude, lowering the noise with low level signals.

(4)

(11) (10) (12)

(13)

6.1.2 Analog Output XLR Connections (1)
LMX 88 has eight dedicated electronically balanced analog outputs provided via standard XLR3M connections. These can be set to Grounded or use Lake Iso-Float in pairs of Channel 1-4 and 5-8. Configured from Lake Controller or Front panel. See 6.1.5 for more information.
LMX 48 has eight shared (with AES3) electronically balanced analog outputs are provided via standard XLR3M connections. These can be set to Grounded or use Lake Iso-Float in pairs of Channel 1-4 and 5-8. Configured from Lake Controller or Front panel. See 6.1.5 for more information.The selection between Analog or AES3 is done in the Lake Controller Output Router, if both a AES3 and Analog Output is routed from a connector the output will be AES3 and a warning displayed in the Lake Controller output router. If only Analog is routed the output will be Analog, and a warning will be displayed in Lake Controller.
NOTE: When the odd connectors are used as AES3 inputs, the even numbers are still available for Analog.
6.1.3 Analog XLR Wiring and Pin Out
All XLR connections are wired to IEC268 as shown in Figure 6-2.

Figure 6-2: IEC268 XLR Wiring and Pin Out
Pin 1: Ground / Shield Pin 2: Hot (+) Pin 3: Cold (-)

30 LMX 88/48 Operation Manual

6.1.4 Unbalanced Operation
Balanced connections are recommended where possible. However, if it is necessary to drive the device from equipment with an unbalanced output, wire the inputs as shown in Figure 6-3.

6.3 Word Clock Input and Output
6.3.1 Word Clock Input (5)
Word clock input on female BNC connector with selectable 75 Ohm Termination available from Front panel or Lake Controller. Word clock input can be used to syncronize any of the internal Clocks.

6.3.2 Word Clock Output (6)
Word Clock output on female BNC connector. Any on the onboard clocks can be output on the Word Clock output at any rate.

Figure 6-3: Balanced to Unbalanced Analog Wiring and Pin Out
The method shown in Figure 6-3 uses twin-and-screen (balanced) cable and standard XLR pin connections at the LMX Series device end, with the cold wire and the cable screen connected to the signal ground of the equipment at the source end.

6.4 RJ45 Connections
There are three RJ45 sockets on the rear panel: two Primary (10) & (12) and one Secondary (11) for use with Dante, AES67 and for control use (in addition there is also one Primary and one Secondary on the front panel). These five RJ45 contacts can be used as a switch when the LMX device has Dual Redundancy disabled, and all sockets work the same.

This usually provides better noise and hum rejection than the more common method of joining pins 1 and 3 together in the XLR. However, if only a single- core (unbalanced) cable is available, the method shown in Figure 6-4 may be used.

When Dual Redundancy is enabled, the Primary and Secondary sockets are on separate VLANs, and Primary must only be connected to other devices using the Dante Dual Redundancy feature and be connected to the Primary network. The same goes for the Secondary network ports that should only be connected to other Secondary ports in the network.

Primary ports (12) also has PoE+ (802.3at Type 2) and can deliver 25W. This can be used, for example, to power a wireless access port. If it is used in this way, then it cannot be used for Dante Multicast streams. The PoE is enabled in the front panel of the device, or from the Lake Controller. It can be configured if the PoE should continue to be on when the device is in Standby.

Figure 6-4: Unbalanced Analog Wiring and Pin Out
6.1.5 ISO-Float Electronic Balancing
The analog input and output electronic balancing circuits use the Lake IsoFloat system.
The Iso-Float technology combines the benefits of transformer-coupled isolation with the advantages of clean, direct-coupled inputs and outputs. The audio converters are galvanically isolated, and not connected to the main ground. High-quality transformers and opto-isolators create a barrier between the device and possible grounding aberrations from the outside electrical environment.
Iso-Float settings are adjustable via the front panel menu or the Lake Controller software.
6.2 AES3 Digital Input and Output

The switched 100/100 Base-T network connections auto-sense whether standard or crossover shielded Cat-5e cables are in use. The green ACT LED illuminates (flashes) to show network activity, and when a 1 Gbps connection is present; the orange LED illuminates (static) to indicate a 1 Gbps connection.
If it is necessary to make up custom shielded Cat-5e network cables, use pinout described in table 6-1.

Table 6-1: RJ45 Wiring & Pin Out Description

Pin No. 1

Color Brown

2

Brown + White

3

Green

4

Blue + White

6.2.1 AES3 Input XLR Connections (3)

5

Blue

The LMX88 has four dedicated 3 pin female XLR sockets for eight AES3 inputs. The LMX48 has four AES3 inputs shared with the analog inputs on sockets 1 and 3, which automatically become AES3 when an AES3 signal is present.
6.2.2 AES3 Output XLR Connectors (4)
The LMX88 has four dedicated 3 pin male XLR sockets for eight AES3 outputs.
The LMX48 has four 3 pin male XLR sockets to eight AES3 outputs, shared with the analog outputs on sockets 1, 3, 5 and 7.
Selecting whether a socket is used for analog or AES3 is done in the output router configuration in the Lake Controller. By default, the sockets are used for analog outputs. When sockets 1, 3, 5 and 7 are used for AES3 2, 4, 6 and 8 can still be used for analog outputs.

6

Green + White

7

Orange

8

Orange + White

Brown Brown / White
Green Blue / White
Blue Green / White
Orange Orange / White

Figure 6-5: RJ45 Wiring and Pin Out Diagram
When the device is connected to an active network, the yellow LINK LED illuminates above the connector in use. Data activity on the network is indicated by illumination of the green ACT LED. It is normal for the ACT LED to flicker either sporadically or continuously.

31 LMX 88/48 Operation Manual

6.5 AES50 Input and Output
Interface A (7) and Interface B (8) AES50 RJ45 ports can each act as a master or slave independently.
Receive Configuration
There are 24 AES50 receivers, which are configurable to receive any channel from either AES50 interface A or B. These are then assigned using the input router in a similar way to Dante channels. The AES50 receivers are configured in the AES50 receive configuration view in Lake Controller.
Transmit Configuration
There are 24 AES50 transmitters, which are configured in the output router. They can be assigned in the AES50 transmit configuration view in the Lake Controller.
6.6 GPI Connection
General Purpose Input (GPI) are provided on one standard RJ-45 (9) allowing interface to external devices such as fire alarm systems for emergency muting, input configuration changes, processor power control, or Scene preset recall. The wiring is the same as in Figure 6-6, and Table 6-1 describes the pinout configuration for the GPI connector.

6.7 Redundant Universal Power Supply
Connectors (13) (14)
Two universal power supplies capable of accepting 90-264 V ~ 50-60 Hz: 75 W are built into the devices. The LMX Series has dual redundant IEC sockets, which can accept locking and standard IEC cables.
The power supply must be connected to AC mains using a power cable with a correctly wired and molded plug for the country of operation. LMX devices work with either or both Mains A (13) or Mains B (14) connected, and both can be connected simultaneously for seamless fallback if either mains power is lost for critical operations where power redundancy is preferred. There is also an optional warning that can be enabled from the front panel menu or Lake Controller if either socket loses power. This makes it easy to see if power is lost on a power grid expected to have power. There is an additional service warning if either PSU malfunctions when mains is connected.

GPI 4 GPI 3 GPI 2 GPI 1

Figure 6-6: GPI Pinout Wiring Diagram

Table 6-2: GPI Pinout Wiring Reference

Cable Number

Color

GPI

1

Orange

1

2

Orange + White

1

3

Green + White

2

4

Blue

2

5

Blue + White

3

6

Green

3

7

Brown + White

4

8

Brown

4

GPI state can be monitored via the front panel or Lake Controller software. Configuration is via the Lake Controller software. Please refer to Lake Controller Operation Manual for information on adjusting via software interface.

32 LMX 88/48 Operation Manual

Appendix

7.1 Faults and Warnings Overview
Fault or warning conditions are indicated by the LEDs and brief textual description of the fault or warning is provided on the display. Table 7-1 lists all Faults and Warnings and what may have triggered each fault or warning condition.

Table 7-1: Warning, Fault and Mute Indications

Faults

LMX Display

Lake Controller

Lake Controller Event Log

PROTECTIVE MUTE PROTECTIVE MUTE Protective mute via GPI

OVERTEMP

OVERTEMP

Temp fault: DSP area

FPGA B FAULT
FPGA B UPD FAIL
I2C COMM FAULT
NO INPUT
INPUT CLIP MOD. CLIP IN RTR MUTE MOD. IN MUTE MOD. OUT MUTE

FPGA B FAULT

Frame Fault: FPGA B communication

FPGA B UPD FAIL Frame Fault: FPGA B update failed

I2C COMM FAULT Frame Fault: I2C communication

NO INPUT

No input source

INPUT CLIP MOD. CLIP IN RTR MUTE MOD. IN MUTE MOD. OUT MUTE

N/A N/A Input Router X Mute Module input mute Module output mute

Description
Protective mute trigged through GPI. All outputs from the device are muted. Unmute via GPI or through a Reset (Mesa, Contour, Contour/Mesa or Factory reset)
The temperature has reached 85°C (185°F). Take additional steps to reduce temperature. Audio is not muted, but continued operation is not guaranteed.
There is a internal communication issue. Power cycle device, if still an issue send the device for service.
There is a internal communication issue. Power cycle device, if still an issue send the device for service.
There is a internal communication issue. Power cycle device, if still an issue send the device for service.
There is a Input router used that for the Module that does not have a valid input.
Input Clip, reduce signal level
Module Clip, reduce signal level
All Input Routers used for the Module Input are muted
Module Input enabled
Module Input enabled

33 LMX 88/48 Operation Manual

Warnings LMX Display
FPGA B UPDATE

Lake Controller FPGA B UPDATE

PSU-B SERVICE

PSU-B SERVICE

PSU-A SERVICE

PSU-A SERVICE

PoE SERVICE

PoE SERVICE

NAME CONFLICT

NAME CONFLICT

TEMP WARNING

TEMP WARNING

DANTE FAILSAFE

DANTE FAILSAFE

DANTE INVALID

DANTE INVALID

DANTE SPI FAULT DANTE DISABLED

DANTE SPI FAULT DANTE DISABLED

DANTE INCOMPAT DANTE INCOMPAT

DANTE SERVICE

DANTE SERVICE

CLOCK SLIPPING

CLOCK SLIPPING

A/D 1-8 SERVICE

A/D 1-8 SERVICE

A/D 1-4 SERVICE A/D 5-8 SERVICE D/A 1-8 SERVICE

A/D 1-4 SERVICE A/D 5-8 SERVICE D/A 1-8 SERVICE

D/A 1-4 SERVICE D/A 5-8 SERVICE FAN SERVICE PSU-B <70 V PSU-A <70 V N/A CTRL OFFLINE

D/A 1-4 SERVICE D/A 5-8 SERVICE FAN SERVICE PSU-B <70 V PSU-A <70 V OFFLINE N/A

Lake Controller Event Log Frame warning: FPGA B is updating
Frame warning: PSU-B Service
Frame warning: PSU-A Service
Frame warning: PoE Service
Dante device name conflict
Temp warning: DSP area
Dante module in failsafe
Dante module is invalid
Dante module SPI fault Dante module disabled
Dante firmware incompatible
Dante module needs service
Clock Slipping
Frame warning: Analog In Ch 1-8 power supply service
Frame warning: Analog In Ch 1-4 power supply service Frame warning: Analog In Ch 5-8 power supply service Frame warning: Analog Out Ch 1-8 power supply fault
Frame warning: Analog Out Ch 1-4 power supply fault Frame warning: Analog Out Ch 5-8 power supply fault Frame Fault: Fan Fault
Frame Warning: Mains on PSU-B <70 V Frame Warning: Mains on PSU-A <70 V Frame Offline
N/A

Description
FPGA B is updating, please wait and let the device update the internal components.
There is a problem with the power supply B for the device. The device can still be powered with PSU A. Send the device for service.
There is a problem with the power supply A for the device. The device can still be powered with PSU B. Send the device for service.
There is a problem with the Power Over Ethernet circuit. The device can still be used without PoE. Send the device for service.
Dante Device name conflict, Dante will not work properly. Set a new Dante Device Name in Lake Controller or Dante Controller.
The temperature has reached 70°C (158°F). Monitor the temperature and take additional steps to reduce temperature if it continues to increase.
Dante Module is in FailSafe, please follow the Dante Failsafe Recovery Guide.pdf found in the Documents folder.
Dante Module unresponsive, but present. Perform a firmware update, if issue still persist send in for service.
Dante Module communication failed. Power cycle device.
Dante Module Disabled, remove any Dante Lock or DDM settings and see if this rectify the issue. Perform a new firmware update.
Dante Module firmware is not compatible, perform a new firmware update with LakeUpdate utility.
The device cannot detect a working Dante Module. Send the device for service.
The selected digital clock and digital input combination is not aligned. Verify digital input configuration to ensure all clock settings match or if the Sample Rate converter need to be enabled for the input.
There is a problem with both the power supply’s for the Analog Inputs ch1-4+5-8. These will not be available. Send the device for service. (LMX 88 only)
There is a problem with the power supply for the Analog Inputs ch1-4. These will not be available. Send the device for service.
There is a problem with the power supply for the Analog Inputs ch5-8. These will not be available. Send the device for service. (LMX 88 only)
There is a problem with both the power supply’s for the Analog Outputs ch1-4+5-8. These will not be available. Send the device for service. (LMX 88 only)
There is a problem with the power supply for the Analog Outputs ch1-4. These will not be available. Send the device for service.
There is a problem with the power supply for the Analog Outputs ch5-8. These will not be available. Send the device for service. (LMX 88 only)
There is a problem with one or both fan(s) on the device. To avoid overheating, identify and fix the problem immediately.
Mains for PSU B is below 70 Volts (Optional Warning)
Mains for PSU A is below 70 Volts (Optional Warning)
The Lake Controller cannot detect the device on the network. Check network connectivity.
The device cannot detect any Lake Controller on the network. Check network connectivity.

34 LMX 88/48 Operation Manual
7.2 Maintenance
During normal operation these devices provides trouble-free service. If the front panel display requires cleaning, use a soft cloth only; do not use solvent cleaners. Clean the dust filters to ensure maximum airflow through the device, which is front to back.

Disconnect the unit from mains power prior to removing dust the filter and ensure the dust filter is replace prior to turning the unit back on.

Do not use sharp or metal objects to remove the dust filter and be careful that the implement used to remove the filter does not enter the device.

In extreme cases it may be necessary to clean the inside of the device. This procedure should only be carried out by qualified service personnel. This may be necessary if the device has had prolonged operation in an extreme environment such as one where cracked oil smoke machines are in use. If the device is used in extreme conditions, it is recommended to have it serviced every three years as a preventative measure.

7.3 Factory Default Settings

7.3.1 Module Defaults
Module Type: Gain: Delay: Polarity: MaxRMS: MaxPeak: Input & Output EQ:

8 x Mesa EQ 0 dB (unity) 0 ms Positive (In phase) 20 dB 21 dB Flat

7.3.2 Input and Router Defaults

Autoselect: Input sensitivity: Dante: AES3: Iso-Float:

On +26 dBu Disabled Terminated Enabled

7.3.2.1 Router Defaults (LMX 88)
Router 1: Dante 1 as Priority 1, AES3 (Ch.1) as Priority 3, Analog 1 as Priority 4 Router 2: Dante 2 as Priority 1, AES3 (Ch.2) as Priority 3, Analog 2 as Priority 4 Router 3: Dante 3 as Priority 1, AES3 (Ch.3) as Priority 3, Analog 3 as Priority 4 Router 4: Dante 4 as Priority 1, AES3 (Ch.4) as Priority 3, Analog 4 as Priority 4 Router 5: Dante 5 as Priority 1, AES3 (Ch 5) as Priority 3, Analog 5 as Priority 4 Router 6: Dante 6 as Priority 1, AES3 (Ch 6) as Priority 3, Analog 6 as Priority 4 Router 7: Dante 7 as Priority 1, AES3 (Ch 7) as Priority 3, Analog 7 as Priority 4 Router 8: Dante 8 as Priority 1, AES3 (Ch 8) as Priority 3, Analog 8 as Priority 4 Routers 9 ­ 16 are unassigned.

7.3.2.2 Router Defaults (LMX 48)
Router 1: Dante 1 as Priority 1, AES3 (Ch.1) as Priority 3, Analog 1 as Priority 4 Router 2: Dante 2 as Priority 1, AES3 (Ch.2) as Priority 3, Analog 2 as Priority 4 Router 3: Dante 3 as Priority 1, AES3 (Ch.3) as Priority 3, Analog 3 as Priority 4 Router 4: Dante 4 as Priority 1, AES3 (Ch.4) as Priority 3, Analog 4 as Priority 4 Router 5: Dante 5 as Priority 1, AES3 (Ch.1) as Priority 3, Analog 1 as Priority 4 Router 6: Dante 6 as Priority 1, AES3 (Ch.2) as Priority 3, Analog 2 as Priority 4 Router 7: Dante 7 as Priority 1, AES3 (Ch.3) as Priority 3, Analog 3 as Priority 4 Router 8: Dante 8 as Priority 1, AES3 (Ch.4) as Priority 3, Analog 4 as Priority 4 Routers 9 ­ 16 are unassigned.

35 LMX 88/48 Operation Manual

7.4 Glossary of Terms, Acronyms and Abbreviations
The explanations given in Table 7-2 below are based on the specific use of each term in this manual. The definitions are not intended to be exhaustive and many of these terms have wider meanings.

Table 7-2: Glossary of Terms, Acronyms and Abbreviations

Term

Description

100/1000 Base-T

100/1000 Base-T is IT industry-speak for different standards of Ethernet network. This term incorporates 100 Base-TX, which operates at 100 Mbps, and 1000 Base-T which operates at 1000 Mbps (1 Gbps).

Access Point

See Wireless Access Point.

AES50

Is a point-to-point topology digital audio network protocol, using the Ethernet physical layer on standard shielded CAT5 cables. It

supports cable lengths of up to 100m and up to 48 channels in 48kHz. The latency is deterministic and extremely low with 63 s.

Auto-Sensing

The Ethernet ports automatically determine the base speed of the network they are connected to (10 Base-T or 100 Base-T) and configure themselves appropriately. This is termed auto-sensing.

Auto-Uplink

The Ethernet ports can operate with either straight or crossed network cables. This ability to connect correctly with either type is termed auto-uplinking.

Auxiliary Output

Some of the configurations possible in the Lake processing system Modules result in a single audio processing channel being created in addition to a crossover. This is termed an Auxiliary output.

Backbone

Large Ethernet networks are often implemented with a very high speed “trunk” part of the network topology feeding main switches, which in turn support smaller, lower-speed local networks. The term backbone is used to describe such a trunk.

Bandwidth

The bandwidth of a signal channel or interconnection is the range of frequencies it is able to handle. The term can be applied to both audio channels and Ethernet networks.

shielded Cat-5e/Cat-6, etc. Designations of industry-standard cables suitable for Ethernet networks using four twisted pairs of conductors. Often referred to as UTP cable (Unscreened Twisted Pair). Cat-5 has generally been replaced by shielded Cat-5e (e = `enhanced’). Either shielded Cat-5e or Cat-6 cable are suitable for networking Lake and Lab.gruppen devices.

Chain

An Ethernet network comprising several devices interconnected using the Secondary connectors to daisy-chain the units together is

an example of a network with a chain topology.

Clock

Digital audio is produced by sampling analog audio at a known, fixed rate, controlled by some form of master clock. Problems can

occur when interconnecting two pieces of digital audio equipment if their internal master clocks are not synchronized. Various

techniques may be employed to ensure that this is the case, either locking the internal to the externa incoming or using the ASRC.

Contour

Terminology given to a Frame or Module that denotes it is configured as a Loudspeaker Processor, normally featuring crossovers and multiple outputs fed from the same input.

Crossed Network Cable

An Ethernet cable in which four of the eight conductors (pins 1, 2, 5 & 6) are not wired pin-to-pin. Such a cable is required in conventional IT networks to connect two PCs togethe

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