9. Appendix
76
PLM+ SERIES Operation Manual rev 3.0.1
9.5. Glossary of Terms, Acronyms and Abbreviations
Term
Description
Floating
such as that found in the PLM+ - do mimic the characteristics of transformer-coupled designs to a high degree.
Frame
Lake terminology for a physical unit containing a Lake processing system, i.e. a single LM 26, PLM, PLM+ or legacy Lake Processor.
Frame ID
Frame Preset
Frame Presets are a class of Presets within the Lake processing system. Up to 100 can be stored in the hardware device, and each holds the complete
Gigabit Ethernet
IEEE 802.3-2008 standard.
Hub
A type of network interface device with multiple Ethernet ports. Data arriving at any port is sent to all others. Hubs have been largely replaced by Switches.
In-Rush Current
When power is applied to a piece of electronic equipment, the initial current taken by the PSU can be very high as the various capacitors in the circuitry charge up;
breakers. The PLM+’s PSU contains circuitry to control the in-rush current to prevent this.
Input Level
The amplitude of an audio signal at the point where it is applied to the input of the device, or at the input of an intermediate stage within it. An analog input signal
level will be expressed in dBu’s, while a digital input signal level in dBfS (dBs below digital clip level; fS = full-scale)
IP Address
Every item of equipment connected to an Ethernet network has a unique address called the IP address, so that data gets to the correct place. IP addresses are
written as four groups of three decimal numbers between 0 and 255. In a system consisting of Lake Processors and a Lake Controller they are assigned and
detected automatically.
IP Subnet Mask
IP subnet masks are required in all IP networks. The subnet is determined by the size and type of network being used. For small networks (less than 254 addresses)
a subnet mask of 255.255.255.0 can be used. (A Class C network).
Iso-Float
Iso-Float is Lake’s proprietary method of electronic balancing, which provides a particularly high level of isolation and immunity from ground loops.
ISVPL
ISVPL is an abbreviation for Inter-Sample Voltage Peak Limiter, a proprietary Lab.gruppen technique for ensuring that voltage at the output terminals of a PLM+
or for universal use.
Lake Controller
The Lake Controller is the software application used to control LM 26 Processors, PLM+ Series and other Lake devices. This software application provides
additional functionality and allows various grouping functions for simultaneous control of multiple Lake Processing enabled devices.
Latency
signals. In the Lake system, latency is assured to be constant.
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
over very long cables.
Linear Phase Crossover
See FIR Filters.
Load Library
See Fingerprint, LoadSmart and SpeakerSafe.
Load, equal/unequal
the same load impedance, or if there are different impedances on different channels.
LoadSmart
speaker connected to it. It is intended to be used pre-performance prior to running SpeakerSafe.
Loop-Thru
is termed a loop-thru.
MAC Address
MaxPeak
Lake’s LimiterMax provides independent dynamics control over signal peaks (MaxPeak) and the average signal level (MaxRMS).
Module
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
Module Preset
the Lake Controller software, not in the hardware device.
The explanations given in Table 9.5 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.
