Appendix
53
Lake LM Series Operation Manual Rev 1.3.5
Term
Description
Legacy Lake Device
This term refers to older Lake audio equipment which may form part of an audio system (i.e. Lake Contour Pro 26, Lake Mesa Quad EQ
and the Dolby Lake Processor). The Lake Controller has the capability to control all Lake legacy products.
LimiterMax
LimiterMax is the name given to Lake’s proprietary package of dynamics control which forms part of the Lake Processing system.
Line Driver
An analog audio amplifier, usually with zero gain, having very low output impedance and high drive capability. They are used for transmit-
ting balanced analog audio over very long cables.
Linear Phase Crossover
See FIR Filters
MAC Address
In addition to an IP address, every device on an Ethernet network has a MAC address. This address is fixed at the time of manufacture,
and is effectively the permanent identifier of the physical unit. MAC stands for Media Access Control
MaxPeak
Lake’s LimiterMax provides independent dynamics control over signal peaks (MaxPeak) and the average signal level (MaxRMS).
MaxRMS
See MaxPeak.
Mesa or Mesa EQ
Terminology given to a Frame or Module that denotes it is configured as a System EQ Processor, providing HPF/LPF, EQ & Levels
functionality (no crossovers). Often configured with a single input to single output routing.
Mesa EQ Filter
The name given to the unique Lake EQ filter with a variable width flat top and variable slopes on each side of the filter.
Module
Module is the term used in the Lake Controller to describe the virtual set of signal processing that routes an audio input to the various
frequency-weighted outputs of a crossover. The processing system within the device allows for two Modules, each of which may be
assigned a range of crossover configurations, input sources, etc.
Module Preset
A class of Preset within the Lake processing system. A Module Preset (Module file) contains all the configuration data and settings for
one Module, and is saved in the Lake Controller software, not in the hardware device.
Offline
A device on an Ethernet network which is not communicating with the rest of the network either due to a fault or intentionally is said to
be offline.
Online
A device on an Ethernet network which is fully operational and communicating with the rest of the network is said to be online.
Parallel
Two or more e.g. inputs which are wired together so that all inputs are connected to the same source are said to be paralleled. Signal
levels will be reduced if too many inputs are paralleled; in the case of AES3, this may result in a complete loss of audio.
Parameter
Any control function which can be adjusted by the user to one of several different values is termed a parameter. For example, input level,
gain, delay, and limiter threshold are all parameters.
Pass-Through Cable
See Straight network cable.
Ping
Ping is a term coined by the IT industry to the procedure of sending a command over a network to a particular Ethernet device asking it
to confirm its identity and possibly reply with additional information. Thus an Lake device on the network can be pinged from the Lake
Controller; on receipt of the ‘ping’, the hi-intensity white LED on the front panel illuminates. Reverse pinging is also possible, whereby
the ping is instigated from Lake hardware device and a visual identification of the processor registers in the Lake Controller software.
Preset
A complete frame configuration that is stored in the device hardware.
Primary Ethernet Port
The Primary Ethernet port on the is the means of connecting the device to a network. See also Secondary Ethernet Port.
PSU
Abbreviation of Power Supply Unit. The PSU in any item of electronic equipment converts the AC mains into a set of internal DC voltages
which run the electronic assemblies themselves.
RJ45
RJ45 connections are the industry-standard connectors for Ethernet ports.
Router
As far as networks of the type discussed in this manual are concerned, see Switch. For a description of the term Input Router used on
Lake devices, see Input Router.
Secondary Ethernet
Port
The Secondary Ethernet port can be used either as a daisy-chain output, repeating the network connection at the Primary port, or for the
connection of a separate second network for full redundancy.
Star Topology
A network topology which uses a network switch to connect to individual Lake devices. Each device connects to one port on the switch
with its own cable, thus the network looks like a star when drawn as a diagram with the switch at the centre.
Straight Network Cable
A Cat-5/6 network cable with full pin-to-pin connections is called a straight network cable. Lake devices can connect to a network using
either straight or crossed network cables.
Subsystem
It is possible when working with large networked systems to store selected components of the system into a Subsystem. This is useful
if working on a tour that encompasses both large and mid-sized venues. The same core Lake Controller data can then be used for a
reduced number of Lake devices.
Super Module
A Super Module is a virtual construct that can be realized within the Lake Controller, allowing a set of Modules in different Frames to be
treated as a single Module.
Switch (Ethernet)
An Ethernet switch allows several Ethernet devices to be connected to a network using a star topology. More intelligent than the earlier
hubs which they now largely replace, they route packets of data only to the units for which they are intended, and also perform other
system housekeeping and control functions.
System Preset
A class of Preset within the Lake Processing system, System Presets allow Module or Frame configurations and settings to be stored for
the entire network of LM and PLM Series devices and legacy Lake processors.
Tablet PC
A compact PC which uses a touchscreen instead of keyboard and mouse. The Lake Controller has been optimized for use on Tablet PCs.
Termination
AES3 digital audio interconnections must be correctly terminated for reliable operation. The 110 ohm terminations must be set ‘on’ at the
beginning and end of a set of daisy-chained digital audio equipment, and ‘off’ at any intermediate ones.
Topology
A mathematical word for “arrangement” or “configuration”. The topology of a network is a means of visualizing the overall configuration
of the network.
