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
PLM
Powered Loudspeaker Management
Rev. 1.0.2
Item no. OM-PLM
Series
™
systems
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Summary of Contents for Lab.gruppen PLM Series

  • Page 1 Operation Manual Series ™ Powered Loudspeaker Management systems ™ Rev. 1.0.2 Item no. OM-PLM...

  • Page 2: Table Of Contents

    5.2 Mounting ............................10 5.3 Rear Mounting ...........................10 5.4 Cooling ...............................11 5.5 Operating voltage ..........................12 5.6 Grounding ............................12 6 PLM sERIEs FEATUREs ..........................13 Front Panel overview .........................13 6.2 Rear Panel overview ..........................15 6.2.1 Input connectors and Links ....................15 6.2.2 Output connectors........................15 6.2.3 Network connectors .......................16...
  • Page 3 9.12 Menu Mode ............................38 9.12.1 Menu View ..........................38 9.12.2 Module submenu ........................39 9.12.2.1 User Gain ........................39 9.12.2.2 Delay ..........................39 9.12.2.3 Phase Reverse ......................39 9.12.2.4 Amp Gain ........................39 9.12.2.5 Limiters ......................... 39 PLM Series Operation Manual 3...
  • Page 4 10.2.1.1 Unbalanced operation ....................48 10.2.1.2 Iso-Float electronic balancing ..................49 10.2.2 Digital inputs and Links ......................49 10.3 Speaker Output Connections......................50 10.3.1 Speakon Output Connectors ....................50 10.3.2 Binding Post Output Connectors ....................51 4 PLM Series Operation Manual...
  • Page 5 12.6 Firmware Upgrades ...........................70 12.6.1 Firmware Upgrades Using the Update Utility .................70 12.6.2 Firmware Upgrades Using the Dolby Lake Controller PLM Edition ........71 12.7 Hot swapping PLM devices.......................72 13 TECHNICAL sPECIFICATIONs ........................73 14 WARRANTY ..............................74 PLM Series Operation Manual 5...

  • Page 6: Approvals

    19. The mains plug is used as the disconnect device and shall remain readily accessible. If the mains plug is not readily accessible due to mounting in a 19” rack, then the mains plug for the entire rack must be readily accessible. 20. The US National Differencescl.16.3 requires that network cables must be flame rated VW-1. 6 PLM Series Operation Manual...

  • Page 7: User Responsibility

    PLMs are capable of producing hazardous 3.3.4 speaker damage output voltages. To avoid electrical shock, do Your PLM Series device is very powerful and not touch any exposed speaker wiring while the PLM can be potentially dangerous to both is operating. The external wiring connected to the loudspeakers and humans alike.

  • Page 8: Welcome

    (See section 7.3.1.) all manuals in their entirety. As you become thoroughly familiar with all aspects of the PLM Series, you may The on-board DSP also implements a comprehensive learn about features and options that will affect your...

  • Page 9: Dolby Lake Processing And Controller

    Raised Cosine Equalization, linear phase crossovers and LimiterMax™ loudspeaker protection. The Super Module feature allows hardware processing modules in two or more separate PLM Series units to function as a single module in the Dolby Lake Controller PLM Edition software interface. (See section 8.2 and the separate Dolby Lake Controller...

  • Page 10: Installation

    5 INsTALLATION The PLM Series products have no top or bottom 5.1 Unpacking 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 Carefully open the shipping carton and check for any wiring.

  • Page 11: Cooling

    Always make sure that the dust filters behind the detachable front panel are clean to ensure maximum possible airflow. If the device malfunctions as a result of dirty dust filters, any required repairs are not covered by the warranty. PLM Series Operation Manual 11...

  • Page 12: Operating Voltage

    Any damage resulting from a PLM Series The audio converters are galvanically isolated, and product being connected to an AC source not connected to the main ground. High-speed...

  • Page 13: Plm Series Features

    The PLM is powered on and off by the top left-most button, STANDBY. See Dolby Lake Controller User Manual PLM Edition Addendum (sections 5.3.1 and 5.7) for further information regarding local and remote power control. PLM Series Operation Manual 13...
  • Page 14 Pressing the MENU button puts the screen display into MENU mode, and the “top” page of the MENU “tree” is displayed. Once in MENU mode, most of the PLM Series’ operating functions can be accessed. See sections 9.12.2 to 9.12.8 for more details. soft function buttons Eight soft function buttons are set adjacent to the display in two groups of four.

  • Page 15: Rear Panel Overview

    These are paralleled the front panel menu, when the PLM is the last to the input connectors to provide an analog unit connected within an AES/EBU daisy-chained loopthrough to feed additional PLM Series units, or system. other equipment. 6.2.2 Output connectors...

  • Page 16: Network Connectors

    AC input to the PLM is via a Neutrik PowerCon permit integration into an Ethernet control network connector, rated at 32 A. encompassing multiple PLM Series units as well as a PC running the DLC PLM Edition software. Network connection permits full control of all PLM functions, and monitoring of all PLM operating parameters, from a remote position.

  • Page 17: Integrated Dolby Lake Processing

    CD drive and allowing the auto-setup routine to run. Select INsTALL then Dolby Lake Controller software from the installation window to initiate As outlined in Section 4, PLM Series products installation. For most installations, the subsequent contain a fully integrated Dolby Lake loudspeaker suggested default paths can be accepted.

  • Page 18: Operation And Performance

    7.1 Introduction to Operation The example PLM 10000Q can deliver power as per Table 7-1 when all four channels are driven equally. This chapter provides comprehensive information on PLM Series connection, setup, operation and Load Impedance performance. The detailed information included here...

  • Page 19: Amplifier And Load Protection Systems

    The ISVPL threshold may be set at any level between 17.8 V and 153 V (model dependent) via the PLM’s menu system. (See Section 9.12.2.5.1 or the Dolby Lake Controller User Manual PLM Edition Addendum PLM Series Operation Manual 19...

  • Page 20: Current Peak Limiter (Cpl)

    Also, high power products such as those by the top left soft button’s LED turning steady red, in the PLM Series can potentially draw more current and the adjacent on-screen text displaying the fault 20 PLM Series Operation Manual...

  • Page 21: Contents

    10 kHz upwards, which illustrates adjacent fault message will show VHF FAULT. It is increasing sensitivity of the protection system with also reported as a fault via the control network. frequency. When continuous output power above the PLM Series Operation Manual 21...

  • Page 22: Short Circuit Protection

    Phase Rev Output EQ Analog 1/2 Mute AES 1 Gain Input Input AES 2 Phase Rev Delay Router Mixer 2 Mute Levels Dante X Phase Rev Output EQ Dante Y Mute PLM Input Mute Module Mute 22 PLM Series Operation Manual...

  • Page 23: Signal Flow And Processing 8

    Amp Gain Output EQ RMS / Peak SpeakerSafe Mute Phase Rev Levels Attenuator LoadSmart LimiterMax Phase Rev Mute ISVPL Amp Gain Output EQ RMS / Peak SpeakerSafe Mute Phase Rev Amplifier Output Mute Module Output Mute PLM Series Operation Manual 23...

  • Page 24: Loudspeaker Processor Configuration

    Details of how to configure the Dolby Lake processing package. The simplest configuration (the default) system can be found in the Dolby Lake Controller is that each input feeds its own set of processing User Manual. elements, including a two-way crossover. The set 24 PLM Series Operation Manual...

  • Page 25: Modules And Frames

    This PLM-specific library is called the LoadLibrary * designation as seen on DLC PLM Edition and the data set for a particular speaker type is called Module display. that type’s Fingerprint. When a PLM-specific loudspeaker type is loaded, PLM Series Operation Manual 25...

  • Page 26: Super Modules

    (including crossover, EQ, limiter and delay settings) it is good practice to store the data in the PC. This allows the Module configuration data to be loaded into other Modules on the network 26 PLM Series Operation Manual...

  • Page 27: Front Panel Interface 9

    If the Module is yet to be placed within the work are offered first, but with very few button presses area then the Module scroll bar will scroll to place the parameter adjustment level is reached, when the highlighted Module mid-screen. PLM Series Operation Manual 27...

  • Page 28: Key Lock Front Panel

    Note that the system must be in METER mode for alter an operating parameter. MUTE ENABLE to be selectable. MENU mode is described in full in section 9.12. If no further mute selections are made, MUTE ENABLE mode self-cancels after two minutes. 28 PLM Series Operation Manual...

  • Page 29: Network Activity Led

    An example is given below: 1. first select the parameter that requires changing via the MENU screen. e.g. ISVPL. 2. Press MENU > Module > Limiters > IsVPL PLM Series Operation Manual 29...

  • Page 30: Exit Button

    In METER mode, pressing the EXIT key will always return the display to the HOME view. The four available mutes are: 1. PLM Input Mutes 2. Module Input Mutes 3. Module Output Mutes 4. Power Output Mutes 30 PLM Series Operation Manual...

  • Page 31: Module Output Mute

    (soft buttons 2 and 3 - see figure 9-6) control the input mutes. Button 2 toggles the input mute of Module A in the Dolby Lake processing system, while Button 3 toggles the input mute of Module B. PLM Series Operation Manual 31...

  • Page 32: Led Faults, Warnings And Clip Indications

    Module inputs (A and B) and the four output channels (1 thru 4). The eighth button is currently unused. Figure 9-8: Input clip LED and on-screen warning 32 PLM Series Operation Manual...

  • Page 33: Green Indications

    DLC User Manual PLM Edition Addendum for further information on accessing the Event Log. A detailed description of each warning can be found in Table 12-1. 9.10.2.3 Red indications Red LED indications are reserved for PLM faults. See Table 9-3. PLM Series Operation Manual 33...
  • Page 34 Module Input Mute Module MOD. IN MUTE Module Input Mute Module Output Mute Channel MOD. OUT MUTE Module Output Mute Amp CH Mute Channel AMP CH. MUTE Amp Channel Mute Table 9-3: Red LED Fault/Clip/Mute Table 34 PLM Series Operation Manual...

  • Page 35: Meter Mode

    - - - - CL2W ∞ CL2W ∞ ∞ Figure 9-13 Figure 9-11 This indicates that output channels 1 and 2 are driven from Module A and output channels 3 and 4 from Module B. PLM Series Operation Manual 35...

  • Page 36: Meter View 1 - Home View

    Module fault or warning, text describing the Input blocks: problem is displayed here. ▸ Line 1 Module name – displays name given to Dolby Lake processing Modules A and B (if block 4 is unused in METER mode. any) 36 PLM Series Operation Manual...

  • Page 37: Meter View 3 - Temperature View

    Temperature View provides information about the current operating temperatures within the PLM and loudspeakers. Frame block: ▸ Line 1 TEMP METERS flag – confirms Temperature view ▸ (blank) Line 2 ▸ Line 3 Power supply temperature meter, PLM Series Operation Manual 37...

  • Page 38: Menu Mode

    Any offsets ▸ Dante in present values are retained. Some of the PLM parameters assume multiple selection as the default setting, so all inputs or outputs are normally adjusted simultaneously. 38 PLM Series Operation Manual...

  • Page 39: Module Submenu

    Delay is adjustable in increments of 0.1 mS. Maximum input delay is 1.8 S, and maximum output delay is 100 mS. The Module delay parameters may also be PLM Series Operation Manual 39...

  • Page 40: Inter-Sample Voltage Peak Limiter (Isvpl)

    The Corner parameter is selectable in 0.1 dB increments from -100 dB to 0 dB, this figure Note that the LEDs in the associated soft buttons representing the level below the limiter threshold at 40 PLM Series Operation Manual...

  • Page 41: Input Routing And Settings Submenu

    Auto Select mode or Forced Selection mode with Router 1 feeds Module A only, and that selected by soft button 4. The rotary encoder scrolls between Router 2 feeds Module B only. However, this can be the following options: PLM Series Operation Manual 41...

  • Page 42: Isofloat

    PLM inputs together, then only the “last” PLM in the digital input signals in 0.1 dB increments from -100 chain should have its termination set on. dB to +15 dB. This parameter may be adjusted by pressing the associated soft button to highlight the 42 PLM Series Operation Manual...

  • Page 43: Attenuation Submenu

    000xxxx adjust attenuation for a ‘subset’ of channels, only one channel at a time or all channels may be adjusted. Figure 9-23 9.12.5.2.1 Firmware version (‘FW version’) Selecting this option displays a page showing the PLM Series Operation Manual 43...

  • Page 44: Firmware Version ('Fw Version')

    9.12.5.2.4 Max Output Current (‘MaxOutCurr’) IP Addr IP Mask This displays the maximum output current that can 169.254.129.24 255.255.0.0 be delivered by the PLM, summed across all four MAC Addr output channels. 80:20:8:a6:14: Frame ID 58000010: fcda7101 Figure 9-25 44 PLM Series Operation Manual...

  • Page 45: Ip Address

    PLM automatically introduces additional processing delay so that all channels incur a total processing delay which equals that of the processing delay of legacy Dolby Lake equipment. See DLC User Manual chapter 7.2.6 for further information. PLM Series Operation Manual 45...

  • Page 46: Loadsmart

    Dante Tx 1 Analog 1 CORRECT SPEAKER Accept SP.COUNT OK temp SP.COUNT: 1 measure. Dante Tx 2 VC TEMP: 0 Analog 1 NO MODEL Cancel SP.COUNT OK SP.COUNT: 0 VC TEMP: 0 Figure 9-28 Figure 9-29 46 PLM Series Operation Manual...

  • Page 47: Dante

    These are essentially items of “metadata”, allowing device monitoring. The assignment of internal PLM parameters to the probes is selectable from this submenu option; the default assignments are output voltage and current for Channel 1. PLM Series Operation Manual 47...

  • Page 48: Back Panel Interface

    See figure 10-4. The electronically-balanced analog inputs are on XLR3F connectors. The Link outputs on XLR3M connectors are directly paralleled to the inputs. All XLRs are wired to IEC268 as follows in figure 10-2: 48 PLM Series Operation Manual...

  • Page 49: Iso-Float Electronic Balancing

    Please read the warnings regarding the this. connection of digital audio signals in section 6.2.1 before attempting to use the AES/EBU See section 13.5 for further information on input. interconnecting digital audio equipment. PLM Series Operation Manual 49...

  • Page 50: Speaker Output Connections

    2 o/p + channel 4 o/p + channel 2 o/p - channel 2 o/p - channel 4 o/p - channel 3 o/p + channel 3 o/p - channel 4 o/p + channel 4 o/p - Table 10-3 50 PLM Series Operation Manual...

  • Page 51: Binding Post Output Connectors

    On Speakon versions, do not use indicated by illumination of the green ACT LED. It is mating plugs without the rear covers in place. normal for the ACT LED to flicker either sporadically or continuously. PLM Series Operation Manual 51...

  • Page 52: Appendix

    LED indication as the operating parameter in question approaches the safety threshold, with the fault state being indicated by the LED turning red when the threshold is actually reached (with a mute being applied in some cases). 52 PLM Series Operation Manual...
  • Page 53 Fault Needs service sERVICE CH. Channel Fault: Unit One or more fuses in the power stage have blown. This is not a user-servicable fault and the unit Needs service should be returned to your dealer. PLM Series Operation Manual 53...
  • Page 54 INACT speakersafe not Warning SpeakerSafe inactive Warns that after LoadSmart verification, SpeakerSafe live monitoring was not started started Loadsmart verification Event LoadSmart active Warns that LoadSmart load verification is in progress Table 11-1 54 PLM Series Operation Manual...

  • Page 55: Maintenance

    (1/4 rated power – see Note 3 at foot of the specific use of each term in this manual. The table); iv) 20 kHz sine wave definitions are not intended to be exhaustive. Many of the terms have wider meanings! PLM Series Operation Manual 55...
  • Page 56 Note that the maximum power condition is very extreme and will not occur during normal operation. Also note that the mains breaker will not be tripped even if operation is in excess of maximum ratings. Table 11-2: PLM 10000Q Current Draw and Thermal Dissipation specifications 56 PLM Series Operation Manual...
  • Page 57 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 58 The amplitude of an audio signal at the point where it is applied to the input of the PLM, 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) 58 PLM Series Operation Manual...
  • Page 59 LoadLibrary The Dolby Lake Controller PLM Edition software incorporates LoadLibrary, an additional set of Modules specific to the PLM Series. These Modules include a database of the electrical characteristics of various popular loudspeakers in addition to the standard Module data. The PLM uses the load data when verifying and monitoring amplifier loads.
  • Page 60 – i.e., with the gain set to maximum. 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 61 VHF protection VHF protection is another amplifier 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 amplifier channel if necessary.

  • Page 62: Application Guide

    PLM has its own breaker, but they all have to operate within the same limit of 16 A; therefore, more care must be taken to ensure that no breaker blows if different loads are used. 62 PLM Series Operation Manual...

  • Page 63: Gain Structure

    PLM. It should retain the same settings as in the module file that is loaded: The The architecture of the PLM Series provides gain limiter and output gain settings in the output stage of adjustments at a number of points in the signal flow the module were configured with this gain setting and path.
  • Page 64 As can be seen above, the improvement in noise performance (at the cost of losing headroom and compression features) is only 0.6 dB. It is therefore recommended not to try to optimize performance in this manner. 64 PLM Series Operation Manual...
  • Page 65 Gain Structure: "Low SPL - Low Input" Application (Low noise with limited output) 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 12-5 PLM Series Operation Manual 65...
  • Page 66 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 12-6 66 PLM Series Operation Manual...

  • Page 67: Speaker Configurations

    Nominal loads as low as 2 ohms are connection of both digital and analog audio signals, supported within the PLM Series; however, it is important not to confuse the two types. it is important to understand that a 2 ohm...

  • Page 68: Interconnecting Digital Audio

    Cable types suitable for microphones may permits delay to be added per-channel; adjustments have inadequate and unpredictable properties at the of a few milliseconds are usually adequate to achieve high frequencies needed for data transmission. coherence between clusters. 68 PLM Series Operation Manual...

  • Page 69: Accessories

    They system. Thus it is recommended that where possible, do not correct for any inherent jitter (timing errors) PLM Series Operation Manual 69...

  • Page 70: Firmware Upgrades

    (particularly mixer- PLM Edition software Vx.y > Firmware stage) of various lengths are available, and to use the Update Utilities > PLM series FW update shortest that each venue will permit. utility (where Vx.y represents the current version of DLC PLM Edition).

  • Page 71: Firmware Upgrades Using The Dolby Lake Controller Plm Edition

    The PLM firmware may also be upgraded from the DLC PLM Edition software application. It is recommended that this method is used only for upgrading small numbers of PLMs. The Firmware Update Utility provides a faster upgrade process for large networks. PLM Series Operation Manual 71...

  • Page 72: Hot Swapping Plm Devices

    The PLM will then finalize the installation process. The message Please Wait is displayed on the unit followed by Amp Fw updated Ok. Cycle Power. Once again cycle power. Wait for each Processor to re-sync following the power cycle. 72 PLM Series Operation Manual...

  • Page 73: Technical Specifications 13

    Intercooler and Class TD 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, Lake, and the double-D symbol are registered trademarks of Dolby Laboratories. Dolby Lake Processor, Lake Contour, Lake Mesa Quad EQ, LimiterMax and Iso-Float are trademarks of Dolby Laboratories.

  • Page 74: Warranty

    (6) years from your Lab.gruppen dealer or distributor, or contact date of purchase from an authorized Lab.gruppen Lab.gruppen by fax or email to obtain the location dealer. of the nearest authorized service centre.
  • Page 75 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 c o n t a c t •...

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