Lab.gruppen PLM Series User Manual

Appendix
79
PLM Series Operation Manual rev 1.1.9
Term Description
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 conrm 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 identication of the processor registers in the Lake Controller software.
Preset
A complete frame conguration 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.
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.
Short Circuit Protection
Relevant only to PLM Series devices. A Lab.gruppen proprietary protective circuit designed to mute a channel when a short circuit is
detected at its output terminals to prevent damage to the device.
Soft Function Buttons
The eight buttons around the front panel display are called soft function buttons because their function varies depending upon which
display page is currently on-screen.
SpeakerSafe
Relevant only to PLM Series devices. Once activated, SpeakerSafe constantly monitors the voltage and current at the PLM’s outputs.
Using Fingerprint data, the software then calculates parameters such as voice coil and magnet temperatures, providing the operator with
real-time performance monitoring. See LoadLibrary.
Speakon
Relevant only to PLM Series devices. An industrial-quality loudspeaker connector manufactured by Neutrik. 4-pole (2 speakers) and
8-pole (4 speakers) versions are tted to various versions of the PLM.
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 congurations and settings to be stored for
the entire network of LM 26 Processors, PLM Series and other legacy Lake devices.
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 “conguration”. The topology of a network is a means of visualizing the overall conguration
of the network.
VHF Protection
VHF protection is another amplier safety circuit developed by Lab.gruppen. The presence of continuous HF audio can easily damage
loudspeakers, so the protection circuit monitors the output this, muting the power output channel if necessary
View
The information available in the front panel display’s Meter mode is split into three pages which are termed Views.
V peak
Relevant only to PLM Series devices. Indicates the peak voltage of an audio signal. For a sinusoidal signal, the peak voltage = 1.414 x the
RMS voltage, Vrms. Not to be confused with peak-to-peak voltage (written V pk-pk), which = V peak x 2.
Vrms
The RMS voltage of a signal. See RMS.
Wireless Access Point
A device used to connect a computer to an Ethernet network without cables; a radio transmitter/receiver for data.
Wireless Network
An Ethernet network where some or all cabled connections are replaced by wireless links.
Table 9-4: Glossary of Terms, Acronyms and Abbreviations

Lab.gruppen PLM Series Specifications

General

DSP	Yes
Network	Ethernet
Connectors	XLR, SpeakON
Cooling	Forced air
Protection Features	Overheat, DC, short circuit
Control Software	Lake Controller