Lab.gruppen PLM series Operation Manual
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Lab.gruppen PLM series Operation Manual

Plm series powered loudspeaker management systems
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Operation Manual
Operation Manual
PLM
Series
™
Powered Loudspeaker Management
systems
™
Rev. 1.1.3
Item no. OM-PLM

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  • Page 1 Operation Manual Operation Manual Series ™ Powered Loudspeaker Management systems ™ Rev. 1.1.3 Item no. OM-PLM...

  • Page 2: Table Of Contents

    6.2.1 Input connectors and Links ......................20 6.2.2 Output connectors ......................... 21 6.2.3 Network connectors ........................22 6.2.4 AC input ............................23 6.3 Integrated Lake Processing ........................23 6.3.1 Lake Controller software ........................23 7. Operation and Performance........................25 7.1 Introduction to Operation ........................25 PLM Series Operation Manual rev 1.1.3...
  • Page 3 9.6 Menu Button ............................40 9.7 Network Activity LED ........................... 41 9.8 Rotary Encoder ............................. 41 9.9 Exit Button ............................42 9.10 Soft-function buttons ..........................42 9.10.1 Mute functions ..........................43 9.10.1.1 PLM Input Mute ........................44 9.10.1.2 Module Input Mute ........................44 PLM Series Operation Manual rev 1.1.3...
  • Page 4 9.13.5.2.5 Serial Number (‘Serial no.’) .....................65 9.13.5.3 Frame Reset ..........................65 9.13.5.3.1 Factory Reset .........................65 9.13.5.3.2 Soft Reset ........................65 9.13.5.4 Network ..........................65 9.13.5.4.1 IP Address ........................66 9.13.5.4.2 MAC Address .........................66 9.13.5.4.3 Frame ID .........................66 9.13.5.4.4 Network status (‘Online’) ....................66 PLM Series Operation Manual rev 1.1.3...
  • Page 5 12.5.1 AES/EBU interface ........................91 12.5.2 System Latency and Delay Compensation ...................92 12.5.3 Connections and cabling ......................92 12.5.3.1 Input and Link connectors .....................92 12.5.3.2 Interconnection options ......................92 12.5.3.3 Cable types and distance limitations ..................93 PLM Series Operation Manual rev 1.1.3...
  • Page 6 12.7 Firmware Upgrades ..........................96 12.7.1 Firmware upgrades using the update utility ..................97 12.7.2 Firmware upgrades using the Lake Controller software .............100 12.8 Hot Swapping PLM devices ......................101 13. Technical Specifications ........................102 14. Warranty ..............................104 PLM Series Operation Manual rev 1.1.3...

  • Page 7: Approvals

    Lorsque la prise du réseau d’alimentation est utilisés comme dispositif de déconnexion, ce dispositif doit demeuré aisément accessible. 3.1.2 CAUTION To reduce the risk of fire or electric shock, do not remove screws. No user-serviceable parts inside. Refer servicing to qualified service personnel PLM Series Operation Manual rev 1.1.3...

  • Page 8: Important Safety Instructions

    As the power output channels produce high voltage, do not connect or disconnect speaker cables when the mains power is on. PLM Series Operation Manual rev 1.1.3...

  • Page 9: Radio Interference

    Consult the dealer or an experienced radio/TV technician for help. 3.3.4 Speaker damage Your PLM Series device is very powerful and can be potentially dangerous to both loudspeakers and humans alike. Many loudspeakers can be easily damaged or destroyed by overpowering them. Always check the speaker’s continuous and peak power capabilities.

  • Page 10: Welcome

    To facilitate timely installation and use of this PLM Series product, your welcome package includes a printed copy of the PLM Series Quick Start and Field Reference Guide. It contains the basic information needed to safely install a PLM system and place it in service. Control and editing features are accessible either via the intuitive front panel interface or remotely, with the included Lake Controller software package.

  • Page 11: Lake ® Processing And Controller

    It also provides detailed information on set-up and configuration of internal features using the front-panel interface. However, if you intend to use the PLM Series unit(s) as part of networked systems, or access monitoring and control features via the Lake Controller software application, then you may need to refer to the following complementary documents.
  • Page 12 PLM Series Quick Start and Field Reference Guide – This document provides basic information needed to unpack, install, and access basic feature sets of the PLM Series. A printed copy is included with your unit. PLM Series Network Configuration Guide – This document provides detailed information on creating net- works of PLM Series units, with sample network topologies and specific recommendations for third-party networking devices.

  • Page 13: Installation

    ® least 120 mm (4.75 inches) clear rack depth behind the PLM rear panel. The PLM Series products have no top or bottom vents; PLM’s may be stacked directly on top of each other. It may be desirable to include a 1U spacer between PLMs to permit more convenient rear panel wiring.
  • Page 14 5.3c may be used as it does not involve any permanently secured fixing at the rear of the unit. Figure 5.3a: Rear support mounting hardware Figure 5.3c: Use tube for slide-on installation Figure 5.3b: Use washer for fixed installation PLM Series Operation Manual rev 1.1.3...

  • Page 15: Cooling

    The amplifier is built in two versions: 115 V and 230 V. Connect the mains cable (AC cord) only to an AC source of the voltage shown on the label. Any damage resulting from a PLM Series product being connected to an AC source of incorrect voltage will not be covered by the warranty.

  • Page 16: Grounding

    In the interests of safety, NEVER disconnect the earth (ground) pin on the mains cable (AC power cord). Use correctly-shielded balanced audio input connections to minimise hum and interference. Refer to section 10.2.1 for more information. PLM Series Operation Manual rev 1.1.3...

  • Page 17: Quick Guide Overview

    Each block has four rows of data, which can be either alphanumeric or in the form of a bargraph meter. PLM Series Operation Manual rev 1.1.3...
  • Page 18 Full details can be found in section 9.10. High-intensity LED A white, high-intensity LED is located to the right of the display. This LED illuminates when the PLM Series’ control system is being accessed remotely via the Lake Controller software. Steady illumination of the white LED indicates that the unit is selected in the Lake Controller software;...

  • Page 19: Rear Panel Overview

    1+/- CH 1+/- 1+/- CH 1+/- 3+/- CH 3+/- 1+/- CH 3+/- CLASS 2 WIRING 2+/- CH 2+/- 2+/- CH 2+/- 4+/- CH 4+/- 2+/- CH 4+/- Must be grounded/earthed Ser. N:o Removed! Made in Sweden PLM Series Operation Manual rev 1.1.3...

  • Page 20: Input Connectors And Links

    +26 dBu. Analog links Two latching XLR3M connectors are fitted adjacent to the analog input connectors. These are paralleled to the input connectors to provide an unprocessed analog loop-through to feed additional PLM Series units, or other equipment. AES/EBU inputs A latching XLR3F connector is provided which accepts an AES/EBU digital audio signal.

  • Page 21: Output Connectors

    Ch. 2 o/p - Ch. 2 o/p - Ch. 4 o/p - Ch. 3 o/p + Ch. 3 o/p - Ch. 4 o/p + Ch. 4 o/p - Table 6.2.2a Speakon wiring and pinouts for 4-channel PLMs PLM Series Operation Manual rev 1.1.3...

  • Page 22: Network Connectors

    Ethernet control network encom- ® passing multiple PLM Series units as well as a PC running the Lake Controller software. Network connec- tion permits full control of all PLM functions, and monitoring of all PLM operating parameters, from a remote position.

  • Page 23: Ac Input

    The Dolby Lake Controller User Manual and the Lake Controller User Manual PLM Addendum. Also see the accompanying PLM Series Network Configuration Guide for details of how to connect one or more PLMs to a PC via the Dante digital audio network.
  • Page 24 Full details on use of the software application are contained in the Dolby Lake Controller User Manual and Lake Controller User Manual PLM Addendum, both of which are supplied with the PLM on an accompany- ing CD ROM and available from the Start Menu. PLM Series Operation Manual rev 1.1.3...

  • Page 25: Operation And Performance

    7.2 Power Output Performance The PLM uses Lab.gruppen’s patented Class TD technology in the output stages, which couples the ef- ficiency of Class D topologies to the sonic purity of Class B designs. The primary benefit is that Lab.gruppen’s Class TD works perfectly under all load conditions. The output maintains its flat frequency response even into complex loads with very low nominal impedances.

  • Page 26: Power Over Time

    “half power” (solid orange line). This is termed asymmetric loading. The rail voltage for this is the dotted blue line. It can be seen that higher power output is available for 25 ms bursts with asymmetric loading. PLM Series Operation Manual rev 1.1.3...

  • Page 27: Amplifier And Load Protection Systems

    ISVPL SETTING (V peak) 9312 6984 4656 2328 1164 8190 6143 4095 2048 1024 6972 5229 3486 1743 5852 4389 2926 1463 3660 2745 1830 2550 1913 1275 1722 1292 1225 17.8 Table 7.3.1: ISVPL-to-output examples PLM Series Operation Manual rev 1.1.3...

  • Page 28: Current Peak Limiter (Cpl)

    PSU will never be overloaded. Also, high-power products such as those in the PLM Series can potentially draw more current (with output devices still within safe operating areas) than is allowed by the mains fuse.

  • Page 29: Current Average Limiter (Cal ™ )

    DC protection is implemented on each power output to prevent damage to connected loudspeakers or any PLM components. DC present at the output will cause the PLM’s power output module fuse to blow. In this instance a red LED will illuminate and the message “Needs service” will be displayed. PLM Series Operation Manual rev 1.1.3...

  • Page 30: Vhf Protection

    The attack time of the VHF protection circuitry also changes with frequency, becoming shorter at higher frequencies. This is shown in figure 7.3.8b. Figure 7.3.8b: VHF protection attack time variations The VHF protection circuit is NOT a limiter and does not alter the PLM’s frequency response. It is imple- PLM Series Operation Manual rev 1.1.3...

  • Page 31: Short Circuit Protection

    PLMs, then there is probably insufficient capacity available to allow full power output on all units during operation. In this case, it is highly recommended that additional capacity be added to the mains power distribution system. PLM Series Operation Manual rev 1.1.3...

  • Page 32: Signal Flow And Processing

    AES 1 Router Input Gain Mute AES 2 Delay Mixer B Phase Rev Dante X (Mute) Mute Module Output: Dante Y Gain/Level Output EQ Phase Rev Mute Module Output: Gain/Level Output EQ Phase Rev Mute PLM Series Operation Manual rev 1.1.3...

  • Page 33: Mute Points

    Mute Attenuator LoadSmart Mute ISVPL Amp Gain Module Output: SpeakerSafe Phase Rev Gain/Level LimiterMax Output EQ Phase Rev RMS / Peak Mute Module Output: Gain/Level LimiterMax Output EQ Phase Rev RMS / Peak Mute PLM Series Operation Manual rev 1.1.3...

  • Page 34: Loudspeaker Processor Configuration

    PSU temperature to the appropriate protection circuits. Refer to section 7.3 – Amplifier and Load Protection Systems for more details. Table 8.1 lists PLM Series analog input sensitivity in dBu and Vrms for various Amp Gain settings and maximum/minimum ISVPL settings. Analog input headroom is set at 26 dBu (see section 9.12.3.1).

  • Page 35: Modules And Frames

    Linear Phase 4-way crossover Classic 5-way crossover or 5 Auxiliary outputs (see Note) Classic 6-way crossover or 6 Auxiliary outputs (see Note) Note: *designation as seen on Lake Controller Module display. Table 8.3: PLM Module file types PLM Series Operation Manual rev 1.1.3...

  • Page 36: Loadlibrary ™ And Fingerprints

    In addition to the standard loudspeaker presets (Module files), the Lake Controller also includes a set of enhanced Module files specifically for use with the PLM Series. Termed the LoadLibrary, these supplementary PLM Module files incorporate both the standard Lake DSP parameters as well as data relating specifically to the PLMs.

  • Page 37: Presets

    Dolby Lake Processors. This enables fast retrieval and switching of configurations as there is minimal data being sent between the Controller and processors. For further information see chapter 6.7 of the Dolby Lake Controller User Manual. PLM Series Operation Manual rev 1.1.3...

  • Page 38: Front Panel Interface

    Warnings about fault conditions or other extreme operating states are given primarily by the tricolor LEDs within the eight soft function buttons around the screen; a simultaneous textual description is shown on the PLM Series Operation Manual rev 1.1.3...

  • Page 39: Pinging Modules In The Lake Controller Software From The Plm

    HOLD the bottom left-hand button while holding the top button.Unlocking can be achieved by repeating this process. PRESS Figure 9.2: Front panel lock activation PLM Series Operation Manual rev 1.1.3...

  • Page 40: Power Button

    Pressing the MENU button while in MENU mode takes the display “back up” one menu level. MENU mode is used only to reconfigure the PLM in some way, or to alter an operating parameter. PLM Series Operation Manual rev 1.1.3...

  • Page 41: Network Activity Led

    The current ISVPL values for output channels 1 to 4 are displayed on the right hand of the screen and the ring surrounding the rotary encoder is illuminated indicating that the rotary encoder is active. PLM Series Operation Manual rev 1.1.3...

  • Page 42: Exit Button

    Eight silicon rubber buttons are set adjacent to the display in two groups of four. These buttons are unlabelled because their functions change according to the on-screen page currently displayed. Figure 9.10: Front panel soft function buttons PLM Series Operation Manual rev 1.1.3...

  • Page 43: Mute Functions

    Module B Module B Figure 9.10.1a: Soft function buttons on a four Figure 9.10.1b: Soft function buttons on a two channel PLM when Mute Enable is active channel PLM when Mute Enable is active PLM Series Operation Manual rev 1.1.3...

  • Page 44: Plm Input Mute

    EQ and level adjustment, but pre any of the PLM’s protection circuitry. See section 9.12.2.6 for details of selecting the Module Output Mute via the menu system. Refer to the Dolby Lake Controller User Manual for details of mute selection via the software. PLM Series Operation Manual rev 1.1.3...

  • Page 45: Power Output Mute

    The positions of the LEDs logically follow the signal flow, with Module inputs located on the left of the screen and outputs on the right. See section 9.10.1 Mute Functions for further information concerning Mute operation. PLM Series Operation Manual rev 1.1.3...
  • Page 46 If the CPL protection device is active, or a voltage clip occurs, then the appropriate Channel Output LED will flash red. In addition, a corresponding text warning will also be displayed on the screen. PLM Series Operation Manual rev 1.1.3...

  • Page 47: Green Indications

    An ‘Event Log’ file records these faults (with date and time stamp) within the PLM. See Chapter 5.3 of the Lake Controller User Manual PLM Addendum for further information on accessing the Event Log. A detailed description of each warning can be found in table 11-1. PLM Series Operation Manual rev 1.1.3...

  • Page 48: Warning And Fault Indications

    Channel MOD. OUT MUTE Module Output Mute Amp CH Mute Channel AMP CH. MUTE Amp Channel Mute Analog Input Fault Frame ANALOG IN FAULT Frame Fault: Analog input Table 9.11b: Red LED Fault/Clip/Mute Table PLM Series Operation Manual rev 1.1.3...

  • Page 49: Meter Mode

    This indicates that output channels 1 and 2 are driven from Module A and output channels 3 and 4 from Module B. If the processor is configured as a single 4-way crossover, the relationship between inputs and outputs will be indicated as shown: PLM Series Operation Manual rev 1.1.3...
  • Page 50 9.12.1 Meter View 1 – Home View HOME - - - - FAULT/WARNING FAULT/WARNING CL3W Y-10 ∞ FAULT/WARNING FAULT/WARNING 2 AUX Y-10SUB ∞ FAULT/WARNING FAULT/WARNING ∞ Ω FAULT/WARNING Figure 9.12.1: Home (default) view PLM Series Operation Manual rev 1.1.3...
  • Page 51 Max within the Lake processing system. ▸ Line 4 Fault/warning indication for the PLM’s power output stage. In the event of a power output channel fault or warning, text describing the problem is displayed here. PLM Series Operation Manual rev 1.1.3...

  • Page 52: Meter View 2 - Module View

    PLM’s maximum output power capability. ▸ Line 4 Gain reduction meter, denoted by L. This meter indicates the degree of limiting being applied by the ISVPL and/or the LimiterMax within the Lake processing system. PLM Series Operation Manual rev 1.1.3...

  • Page 53: Meter View 3 - Temperature View

    Celsius. The numerical value is also displayed at the right-hand end of the meter. ▸ Computed temperature of magnet of loudspeaker connected to the output channel (denoted by Line 3 ‘MAG’). This parameter is calculated and displayed in a similar way to the voice coil temperature. PLM Series Operation Manual rev 1.1.3...

  • Page 54: Meter View 4 - Input View

    2 activated (on) indicates that the input to the Lake Processing Module is a mix of the signal from input router 1 and input router 2. ▸ Line 3 Output meter showing signal level out from the input mixer to the Lake Processing Module. A PLM Series Operation Manual rev 1.1.3...

  • Page 55: Meter Mode

    Note that soft button 1 does not have any options associated with it at any of the submenu levels. The text in block 1 confirms Menu mode, and also the submenu and further options selected. PLM Series Operation Manual rev 1.1.3...

  • Page 56: Module Submenu

    Amp Gain Gain Limiters Delay Polarity Mute Figure 9.13.2: Module menu view The options available are as follows: 9.13.2.1 Gain This option is selected by pressing soft button 2 (Gain) from Menu è Module. PLM Series Operation Manual rev 1.1.3...

  • Page 57: Phase Reverse

    LimiterMax can be adjusted in this submenu. By default, simultaneous adjustment of most limiter parameters in all four output channels is selected, though channels may be adjusted individually if desired. Attack and Release times must be adjusted individually per channel. PLM Series Operation Manual rev 1.1.3...

  • Page 58: Inter-Sample Voltage Peak Limiter Threshold (Isvpl Threshold)

    17.8 V to 193 V. (Note this represents an instantaneous peak voltage, not the RMS value of the output signal.) Within block parentheses, the actual value is displayed. The actual value can be limited by the maximum voltage a particular PLM Series model can produce. 9.13.2.5.2 Inter-Sample Voltage Peak Limiter Profile (ISVPL Profile) Selecting the ISVPL Profile will optimize the ISVPL limiting for the specific frequency band.

  • Page 59: Maxrms Release (Maxrmsrel)

    This submenu is selected by pressing soft button 3, labelled Input Cfg from the menu top page. Menu Input Cfg Router 1 Router 2 Iso Float Aes Term Figure 9.12.3: Input routing menu view PLM Series Operation Manual rev 1.1.3...

  • Page 60: Input Selection And Sensitivity Settings

    Also note that it is not possible to have both analog inputs in the priority list of the same router. Two modes of input selection are available, Auto Select and Forced Selection. PLM Series Operation Manual rev 1.1.3...
  • Page 61 (in the case of the digital inputs). The maximum input level which can be accepted by the analog input pre-amplifiers without clipping may be set to 12 dBu or 26 dBu. Digital gain offset may be applied to AES/EBU digital input signals in 0.1 dB increments from -100 dB to +15 PLM Series Operation Manual rev 1.1.3...

  • Page 62: Iso-Float

    Once the Menu è Input Cfg è Aes Term page is displayed, the rotary encoder can be used to change the termination setting from Unterminated to Terminated. 9.13.4 Attenuation submenu This submenu is selected by pressing soft button 4, labeled Attenuation from the menu top page. PLM Series Operation Manual rev 1.1.3...

  • Page 63: Frame Submenu

    Display block 2 shows the Frame label if one has been assigned; otherwise, a row of hyphens is displayed. Assignment of a name to a Frame is only possible from the Lake Controller software. Default Frame name is the model name (i.e. 10000Q or 14000). PLM Series Operation Manual rev 1.1.3...

  • Page 64: Frame Info

    In many cases, the latency will be sufficiently small compared with any time-alignment delay that it can be ignored. The page displayed when this option is selected shows the latency currently incurred through the PLM, measured from input to output. PLM Series Operation Manual rev 1.1.3...

  • Page 65: Max Output Voltage ('Maxoutvolt')

    PLM’s network settings. These settings are only alterable from the Lake Control- ler software. Menu PRIM LINK OK Frame NO SEC LINK CTRL ONLINE Network IP Addr IP Mask 169.254.129.24 255.255.0.0 MAC Addr 80:20:8:a6:14: Frame ID 58000010: fcda7101 Figure 9.13.5.4: Network info menu view PLM Series Operation Manual rev 1.1.3...

  • Page 66: Ip Address

    The parameters of the display screen itself may be adjusted here, to suit ambient lighting conditions. 9.13.5.6.1 Display Contrast Press soft button 2 and use the rotary encoder to adjust the contrast of the display. A wide range of adjust- ment is available. PLM Series Operation Manual rev 1.1.3...

  • Page 67: Dimming

    Each channel may be selected in turn and the rotary control used to enter a value of 1, 2, 3 or 4. This figure is used by the PLM’s LoadSmart load verification and SpeakerSafe real-time performance monitoring routines to confirm the correct connection and status of the speakers connected to each PLM channel. PLM Series Operation Manual rev 1.1.3...

  • Page 68: Loadsmart Verification

    Meter Mode, Temperature View, and also on the Status and History tabs of the Lake Controller software. 9.13.7.3 Estimated # of Cabinets When SpeakerSafe is running, this submenu displays the estimated number of cabinets from the Speaker- Safe’s continuous monitoring of the attached load. PLM Series Operation Manual rev 1.1.3...

  • Page 69: Dante

    The audio is embedded in the Dante data stream in that PLM, and is thus available to other Dante- enabled devices (i.e. further PLMs). In this way, the PLM is being used as a “break-in box”. PLM Series Operation Manual rev 1.1.3...

  • Page 70: Back Panel Interface

    All XLRs are wired to IEC268 as follows in figure 10.2: Pin 1: Ground/shield Pin 2: Hot (+) Pin 3: Cold (-) Figure 10.2.1b: Analog XLR wiring and pin out PLM Series Operation Manual rev 1.1.3...

  • Page 71: Unbalanced Operation

    Iso-Float on the PLM is accessed via the menu system; see section 9.12.3.2 for details. Additionally it is possible to control Iso-Float directly from the Lake Controller software. PLM Series Operation Manual rev 1.1.3...

  • Page 72: Digital Inputs And Links

    “daisy-chained” together. The practical limit will be determined by cable type and length as well as the output circuit of the driving source. It may be necessary to employ an AES/EBU line driver or distribution amplifier to achieve reliable results in some situations. PLM Series Operation Manual rev 1.1.3...

  • Page 73: Speaker Output Connections

    On 2-channel PLM models the two power output channels are available simultaneously on two 4-pole Speakon connectors. Both connectors carry both channels. The second connector offers the channels in reverse order. The table below shows the proper wiring scheme for these Speakon outputs. PLM Series Operation Manual rev 1.1.3...
  • Page 74 When wiring the loudspeaker connections, ensure that all ‘+’ loudspeaker connections are connected to the pins marked ‘+’, and that all ‘ - ‘ connections to ‘ – ‘ pins. PLM Series Operation Manual rev 1.1.3...

  • Page 75: Binding Post Output Connectors

    On Speakon versions, do not use mating plugs without the rear covers in place. 10.4 RJ45 Connectors PRIM LINK LINK SWITCHED 10/100 Base-TX Figure 10.4a: Rear panel Dante EtherCon network connectors The network connections of the PLM are on two Neutrik EtherCon RJ45 sockets. The second connector PLM Series Operation Manual rev 1.1.3...
  • Page 76 When the PLM 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. PLM Series Operation Manual rev 1.1.3...

  • Page 77: Appendix

    LoadSmart verification Event LoadSmart active LoadSmart load verification is in progress NO LOAD Channel Fault: No Load Fault No load No load detected at the power output channel. Detected PLM Series Operation Manual rev 1.1.3...
  • Page 78 Fault Load type mismatch WRONG LOAD Load Type / Routing LoadSmart is measuring load characteristics which differ from those of the assigned speaker type. Mismatch Table 11.1: Faults and warnings overview PLM Series Operation Manual rev 1.1.3...

  • Page 79: Maintenance

    Analog 1 set as Priority 4 Router 2 ▸ AES 2 set as Priority 1 ▸ Analog 2 set as Priority 4 Frame/Power Output Stage Attenuation: 0 dB Polarity: In phase. Mute: Unmuted Load Model: Not loaded PLM Series Operation Manual rev 1.1.3...

  • Page 80: Current Draw And Thermal Dissipation Specifications

    Lake is a registered trademark of Lab.gruppen AB. PLM and Powered Loudspeaker Management are trademarks of Lab.gruppen AB. Dante is a trademark of Audinate Pty Ltd. All other trademarks are the property of their respective owners.
  • Page 81 Table 11.4b: PLM 10000Q Current Draw and Thermal Dissipation specifications Lake is a registered trademark of Lab.gruppen AB. PLM and Powered Loudspeaker Management are trademarks of Lab.gruppen AB. Dante is a trademark of Audinate Pty Ltd. All other trademarks are the property of their respective owners.

  • Page 82: Glossary Of Terms, Acronyms And Abbreviations

    Various techniques may be employed to ensure that this is the case. Short for Current Peak Limiter, a Lab.gruppen protection technique which ensures that the amplifier’s output transistors can never attempt to deliver more than their rated current.
  • Page 83 The Lake Controller is the software application used to control one or more PLM devices. This software application provides additional functionality to allow control over various dedicated Lab.gruppen features within the PLM. It is also possible to use the Lake Controller to control larger systems configured with PLMs, Dolby Lake Processors and other Dolby Lake legacy devices.
  • Page 84 Short circuit 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 amplifier.

  • Page 85: Application Guide

    If the mains supply is 115 V and the system requirement is 6 PLMs, then the mains capacity would need to be able to supply two 3 x 30 A circuits. There are two methods of achieving this: PLM Series Operation Manual rev 1.1.3...

  • Page 86: Gain Structure

    12.3 Gain Structure The architecture of the PLM Series provides gain adjustments at a number of points in the signal flow path. Thus, there are many places in which one can adjust the levels in the PLM. Each point serves a different purpose.

  • Page 87: Gain / Level Optimization

    Attenuator One adjustment is provided per output channel in the PLM. This control replaces the traditional knob found on conventional amplifiers. It should typically be left at 0 dB during use. (Adjustments made in Lab.gruppen Info, Status tab). Amp Gain Corresponds to the gain adjustment in a conventional system if the amplifier was outside the PLM.
  • Page 88 Gain Structure: "High SPL - Low noise - Good headroom" 100,0 50,0 Clip -50,0 Nominal -100,0 Noise -150,0 Analog AES Input Input Mixer Module In Module Out Attenuation Analog Ref Amp Gain ISVPL Output -200,0 -250,0 Figure 12.2b: Gain structure: Digital input source PLM Series Operation Manual rev 1.1.3...
  • Page 89 80,0 60,0 40,0 20,0 Clip -20,0 Nominal -40,0 Noise -60,0 -80,0 -100,0 -120,0 -140,0 Analog AES Input Input Mixer Module In Module Out Attenuation Analog Ref Amp Gain ISVPL Output Figure 12.4b: Minimizing noise PLM Series Operation Manual rev 1.1.3...
  • Page 90 Gain Structure: "High SPL" Application (Moderate noise with very high output) 60.0 40.0 20.0 -20.0 Clip Nominal -40.0 Noise -60.0 -80.0 -100.0 -120.0 -140.0 Analog AES Input Input Mixer Module In Module Out Attenuation Analog Ref Amp Gain ISVPL Output Figure 12.2c PLM Series Operation Manual rev 1.1.3...

  • Page 91: Speaker Configurations

    The information in this section is supplied for users who are unfamiliar with interconnections using the AES/ EBU standard. Those users who are already thoroughly familiar with AES/EBU interconnections will find that the PLM Series conforms to established conventions, and therefore may choose to skip this section. 12.5.1 AES/EBU interface The original AES/EBU digital audio interface standard was developed by the Audio Engineering Society in conjunction with the European Broadcast Union.

  • Page 92: System Latency And Delay Compensation

    When multiple PLM units will be receiving the same AES/EBU signal, connections may be configured in one of two ways: Daisy-chain – Connect the signal source (mixing console, “digital snake” or distribution amplifier) to the PLM Series Operation Manual rev 1.1.3...

  • Page 93: Cable Types And Distance Limitations

    Some distribution amplifiers also offer a reclocking feature, which also re-times the signal to prevent signal degradation from clocking errors (“jitter”). Units that offer re-clocking often make the feature switchable; PLM Series Operation Manual rev 1.1.3...

  • Page 94: Passive Splitters

    Attenuation is minimal, but there is no “refreshing” of the signal. 12.5.5 Additional reference Complete technical information on the AES/EBU (AES3) standard can be downloaded from the AES web site at http://www.aes.org/publications/standards/. PLM Series Operation Manual rev 1.1.3...

  • Page 95: Digital Clock Configuration

    12. Application Guide 12.6 Digital Clock Configuration In order to provide a highly flexible and robust audio processing system, PLM Series devices are equipped with a configurable clocking system. To fully take advantage of the flexibility the system needs to be config- ured with respect to clock source and base rate.

  • Page 96: Firmware Upgrades

    PLM with a more recent version. You can contact your Lab.gruppen dealer or distributor, or visit the Lab.gruppen website for details on available updates: www.labgruppen.com/plm...

  • Page 97: Firmware Upgrades Using The Update Utility

    Start > All Programs > Lake Controller software Vx.y > Firmware Update Utilities > PLM Series FW update utility (where Vx.y represents the current version of Lake Controller). If the PC is configured with multiple network adapters, select the required network adapter from the displayed list and tap OK.
  • Page 98 The PLMs will be updated with the latest firmware. A green tick indicates successful update and the percentage value indicates the progress of the firmware update of that unit. A red cross indicates the firmware has not yet been upgraded to the selected target firmware version. PLM Series Operation Manual rev 1.1.3...
  • Page 99 12. Application Guide 12.7.1d: Firmware update utility step four Wait for all selected PLMs to be upgraded and the information message to appear. PLM Series Operation Manual rev 1.1.3...

  • Page 100: Firmware Upgrades Using The Lake Controller Software

    PLM it relates to has old firmware and a warning message will appear. Read the warning message and tap Place all old firmware modules in the work area, then tap Home. 2.7.2: Firmware updating via the Lake Controller soft- ware Tap the flashing Update Firmware button. PLM Series Operation Manual rev 1.1.3...

  • Page 101: Hot Swapping Plm Devices

    It is possible to achive this by using the Replace Frame facility within the Lake Controller software application. See Lake Controller User Manual chapter 7.4.3 for further information. PLM Series Operation Manual rev 1.1.3...

  • Page 102: Technical Specifications

    Intercooler, Class TD and Lake are national and/or international registered trademarks of Lab.gruppen AB. PLM, Powered Loudspeaker Management, R.SMPS, LoadLibrary, LoadSmart, SpeakerSafe and ISVPL are trademarks of Lab.gruppen AB. Dolby and the double-D symbol are registered trademarks of Dolby Laboratories. Contour, Mesa Quad EQ, Mesa Parametric EQ, Raised Cosine Equalization, LimiterMax and Iso-Float are trademarks of Dolby Laboratories.
  • Page 103 Intercooler, Class TD and Lake are national and/or international registered trademarks of Lab.gruppen AB. PLM, Powered Loudspeaker Management, R.SMPS, LoadLibrary, LoadSmart, SpeakerSafe and ISVPL are trademarks of Lab.gruppen AB. Dolby and the double-D symbol are registered trademarks of Dolby Laboratories. Contour, Mesa Quad EQ, Mesa Parametric EQ, Raised notice.

  • Page 104: Warranty

    14. Warranty General This product is manufactured by Lab.gruppen, and it is warranted to be free from any defects caused by components or factory workmanship, under normal use and service, for a period of six (6) years from date of purchase from an authorized Lab.gruppen dealer.
  • Page 105 14. Warranty Technical assistance and service International If your Lab.gruppen product requires repair, contact your Lab.gruppen dealer or distributor, or contact Lab. gruppen by fax or email to obtain the location of the nearest authorized service centre. Factory service In the event Lab.gruppen product requires factory service, you may contact Lab.gruppen’s service depart- ment for return instructions and a Return Authorization number.
  • Page 106 Operation Manual L A B . G R U P P E N A B ► S W E D E N I N T E R N A T I O N A L C O N T A C T ► I N F O @ L A B G R U P P E N . C O M U S &...

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