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Lab.gruppen PLM Series Operation Manual

Manual is about: Powered Loudspeaker Management systems

Summary of PLM Series

  • Page 1

    Rev. 1.1.3 item no. Om-plm operation manual plm ™ series powered loudspeaker management ™ systems operation manual.

  • Page 2: Table of Contents

    2 plm series operation manual rev 1.1.3 table of contents table of contents 2. Approvals .....................................................................................................................................................7 3. Warnings ...................................................

  • Page 3: Table of Contents

    Plm series operation manual rev 1.1.3 table of contents 3 7.1.1 operation precautions .....................................................................................................................25 7.2 power output performance ....................................................................

  • Page 4: Table of Contents

    4 plm series operation manual rev 1.1.3 table of contents 9.10.1.3 module output mute .............................................................................................................44 9.10.1.4 power output mute ..............................................................................

  • Page 5: Table of Contents

    Plm series operation manual rev 1.1.3 table of contents 5 9.13.5.4.5 ip mask ..........................................................................................................................66 9.13.5.5 latency match ..............................................................................

  • Page 6: Table of Contents

    6 plm series operation manual rev 1.1.3 table of contents 12.5.3.4 signal degradation and loss ..................................................................................................93 12.5.4. External signal distribution hardware .............................................................

  • Page 7: 2. Approvals

    Plm series operation manual rev 1.1.3 2. Approvals 7 2. Approvals this equipment conforms to the requirements of the emc directive 2004/108/ec and the requirements of the low voltage directive 2006/95/ec. Standards applied: emc emission en55103-1, e3 emc immunity en55103-2, e3, with s/n below 1% at ...

  • Page 8: 3. Warnings

    8 plm series operation manual rev 1.1.3 3. Warnings 3.2 important safety instructions before using your plm, be sure to carefully read the applicable items of this operation manual and the safety instructions. Keep this manual for future reference. 1. Heed all warnings. 2. Follow all instructions. 3...

  • Page 9: 3. Warnings

    Plm series operation manual rev 1.1.3 3. Warnings 9 3.3.3 radio interference a sample of this product has been tested and complies with the limits for the european electro magnetic compatibility (emc) directive. This equipment has also been tested and found to comply with the limits for a class b di...

  • Page 10: 4. Welcome

    10 plm series operation manual rev 1.1.3 4. Welcome 4. Welcome 4.1 introduction thank you for choosing the lab.Gruppen plm series of powered loudspeaker management systems for your sound reinforcement needs. We are confident that you will be pleased with the performance, unique features, configurati...

  • Page 11: 4. Welcome

    Plm series operation manual rev 1.1.3 4. Welcome 11 compression and identify potential problems. (see the lake controller user manual plm addendumfor more detailed information on plm series load verification and real-time performance monitoring functions.) 4.2.3 lake ® processing and controller the ...

  • Page 12: 4. Welcome

    12 plm series operation manual rev 1.1.3 4. Welcome http://www.Labgruppen.Com/index.Php/products/documentation/ 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 in...

  • Page 13: 5. Installation

    Plm series operation manual rev 1.1.3 5. Installation 13 5. Installation 5.1 unpacking carefully open the shipping carton and check for any damage to the plm series product or the supplied accessories. Every lab.Gruppen product is tested and inspected before leaving the factory and should arrive in ...

  • Page 14: 5. Installation

    14 plm series operation manual rev 1.1.3 5. Installation note that the support brackets are reversible and may be fitted to point either to the front or rear of the rack. The orientation used in a particular situation will depend on the depth of the rack and the position of the rear rack rails. Two ...

  • Page 15: 5. Installation

    Plm series operation manual rev 1.1.3 5. Installation 15 5.4 cooling the plm uses a forced-air cooling system with airflow from front to rear, allowing high continuous power levels without thermal problems. (front-to-rear airflow is preferable as air at the front of a rack is cooler than that at the...

  • Page 16: 5. Installation

    16 plm series operation manual rev 1.1.3 5. Installation the plm uses primary switching, which means the mains power is rectified on the primary side of the transformer. This makes the power supply insensitive to mains frequency variation, and it will operate normally on line frequencies from 45 to ...

  • Page 17: 6. Quick Guide Overview

    Plm series operation manual rev 1.1.3 6. Quick guide overview 17 6. Quick guide overview plm series 3 4 5 6 7 8 9 10 11 12 1 1 2 2 figure 6.1: plm front panel layout 6.1 front panel overview the front panel controls, clustered around a 2.5” daylight readable lcd, perform most control and monitoring ...

  • Page 18: 6. Quick Guide Overview

    18 plm series operation manual rev 1.1.3 6. Quick guide overview the brightness of the display and the adjoining network activity led can be adjusted in the frame page of the main menu. Comprehensive details of the various display pages and the associated controls are given in section 9 – front pane...

  • Page 19: 6. Quick Guide Overview

    Plm series operation manual rev 1.1.3 6. Quick guide overview 19 the brightness of the display and the adjoining network activity led can be adjusted in the frame page of the main menu. Encoder the rotary encoder is used to modify various plm parameters (e.G. Input level) in the leaf nodes of the me...

  • Page 20: 6. Quick Guide Overview

    20 plm series operation manual rev 1.1.3 6. Quick guide overview ser. N:o removed! Speaker outputs input 1 input 2 link 1 link 2 aes/ebu input 1-2 link 1-2 link sec prim act link act switched 10/100 base-tx must be grounded/earthed made in sweden pin 1: scrn 2: pos 3: neg analog with i so- f loat tm...

  • Page 21: 6. Quick Guide Overview

    Plm series operation manual rev 1.1.3 6. Quick guide overview 21 aes/ebu link a latching xlr3m connector is fitted adjacent to the aes/ebu input connector. This is paralleled to the input connector to provide an unprocessed aes/ebu loop-thru to feed further plms, or other equipment. An aes/ebu 110 o...

  • Page 22: 6. Quick Guide Overview

    22 plm series operation manual rev 1.1.3 6. Quick guide overview pin no. Nl4 #1 chs. 1 & 2 nl4 #2 chs. 2 & 1 1+ ch. 1 o/p + ch. 2 o/p + 1- ch. 1 o/p - ch. 2 o/p - 2+ ch. 2 o/p + ch. 1 o/p + 2- ch. 2 o/p - ch. 1 o/p - table 6.2.2b speakon wiring and pinouts for 2-channel plms 6.2.3 network connectors...

  • Page 23: 6. Quick Guide Overview

    Plm series operation manual rev 1.1.3 6. Quick guide overview 23 6.2.4 ac input mains connector ac input to the plm is via a neutrik powercon connector, rated at 32 a. 6.3 integrated lake processing as outlined in section 4, plm series products contain a fully integrated lake loudspeaker management ...

  • Page 24: 6. Quick Guide Overview

    24 plm series operation manual rev 1.1.3 6. Quick guide overview if pre-existing dolby lake controller (lake control- ler) presets are present on your pc when you install the lake controller software, choosing a specific installation path may be preferable. See the lake controller user manual plm ad...

  • Page 25: 7. Operation and Performance

    Plm series operation manual rev 1.1.3 7. Operation and performance 25 7. Operation and performance 7.1 introduction to operation this chapter provides comprehensive information on plm series connection, setup, operation and performance. The detailed information included here is essential to realizin...

  • Page 26: 7. Operation and Performance

    26 plm series operation manual rev 1.1.3 7. Operation and performance table 7.2.2a: asymmetrical load power ratings for plm 10000q load impedance (ohms) 2.0 2.7 4 8 16 max. Output power (watts) 2350 2900 2400 1200 660 table 7.2.2b: asymmetrical load power ratings for plm 14000 load impedance (ohms) ...

  • Page 27: 7. Operation and Performance

    Plm series operation manual rev 1.1.3 7. Operation and performance 27 7.3 amplifier and load protection systems the plm is equipped with a comprehensive set of protection circuits. If operating conditions become suf- ficiently extreme that any of these circuits become active, indication is provided ...

  • Page 28: 7. Operation and Performance

    28 plm series operation manual rev 1.1.3 7. Operation and performance * note that these ratings are limited by the cpl (current peak limiter) functions, not by isvpl settings, due to amplifier channel current capacity. The isvpl threshold may be set at any level between 17.8 v and 193 v via the plm’...

  • Page 29: 7. Operation and Performance

    Plm series operation manual rev 1.1.3 7. Operation and performance 29 the pal protection feature can help prevent the supply’s external breaker from tripping within time intervals of less than three minutes. For longer time intervals, it is the responsibility of the user to ensure that the average l...

  • Page 30: 7. Operation and Performance

    30 plm series operation manual rev 1.1.3 7. Operation and performance the power output channel modules are independent of the input voltage. Both 115 and 230 v models have amp channel fuses. This is not a user- servicable fault condition and the unit should be returned for repair. 7.3.8 vhf protecti...

  • Page 31: 7. Operation and Performance

    Plm series operation manual rev 1.1.3 7. Operation and performance 31 mented solely to detect continuous vhf content. Hf content of normal music or speech signals at peak levels will be passed in full. Operation of the vhf protection circuits is indicated by one (or more) of the output channel leds ...

  • Page 32

    32 plm series operation manual rev 1.1.3 8. Signal flow and processing 8. Signal flow and processing 8.1 signal flow figure 8.1 is a graphic presentation of the signal flow inside a plm. As is readily apparent, the plm is an unusually sophisticated system comprising many different subsections of bot...

  • Page 33

    Plm series operation manual rev 1.1.3 8. Signal flow and processing 33 additionally, the physical inputs to the plm can be mixed, with level adjustment, prior to entering the lake module. This adjustment is available only through the lake controller software. 8.1.2 mute points unlike traditional amp...

  • Page 34

    34 plm series operation manual rev 1.1.3 8. Signal flow and processing the sophisticated output section monitors faults and generates warnings when appropriate; warnings are displayed on the front panel of the plm and also sent as messages over the control network. These indications allow the operat...

  • Page 35

    Plm series operation manual rev 1.1.3 8. Signal flow and processing 35 the lake processing system provides two distinct categories of crossovers: infinite impulse response filters (iir) such as the classic bessel, butterworth or linkwitz-riley types; ▸ these are available with slopes ranging from 6 ...

  • Page 36

    36 plm series operation manual rev 1.1.3 8. Signal flow and processing **only partial implementation of these module types is possible within a single plm, as each plm is limited to two or four outputs. The output router of the processor can be used to select which four module outputs are routed to ...

  • Page 37

    Plm series operation manual rev 1.1.3 8. Signal flow and processing 37 are replicated in all the assigned modules, resulting in improved efficiency in system configuration and a reduction in on-screen icons within the lake controller software. Consider the case of modules in three plms being configu...

  • Page 38: 9. Front Panel Interface

    38 plm series operation manual rev 1.1.3 9. Front panel interface 9. Front panel interface 9.1 front panel navigation 9.1.1 general description of navigation in the plm the majority of plm functions can be controlled and/or monitored via the front-panel lcd display screen and associated switches and...

  • Page 39: 9. Front Panel Interface

    Plm series operation manual rev 1.1.3 9. Front panel interface 39 display, adjacent to the button. A full description of the various warning indications is given in section 9.10.2. In general, leds to the left of the display will indicate problems with the plm or its inputs, while those to the right...

  • Page 40: 9. Front Panel Interface

    40 plm series operation manual rev 1.1.3 9. Front panel interface 9.3 power button the plm is powered by pressing the top left-most button in the left-hand cluster. It has a bicolor ‘power’ symbol which illuminates red when the plm is connected to the ac mains, and turns green when the button is pre...

  • Page 41: 9. Front Panel Interface

    Plm series operation manual rev 1.1.3 9. Front panel interface 41 menu mode is described in full in section 9.12. 9.7 network activity led located above the rotary encoder is an ultra-bright white led. This led illuminates when there is network activity between the lake controller software and the p...

  • Page 42: 9. Front Panel Interface

    42 plm series operation manual rev 1.1.3 9. Front panel interface figure 9.8: activated rotary encoder 3. Pressing the adjacent soft function buttons to the displayed isvpl values selects or deselects the param- eters from the rotary encoder. Selected isvpl value is highlighted (inverse video) de-se...

  • Page 43: 9. Front Panel Interface

    Plm series operation manual rev 1.1.3 9. Front panel interface 43 in meter mode, and with mute enable active, the soft function buttons are used to mute and unmute the plm’s individual module inputs and power stage outputs. In menu mode these buttons are used to navigate the menu structure. 9.10.1 m...

  • Page 44: 9. Front Panel Interface

    44 plm series operation manual rev 1.1.3 9. Front panel interface 9.10.1.1 plm input mute muting of the plm’s inputs is not available via the mute enable button in meter mode. It can however be actioned from the input meter view - via the mute enable button in the input view and from the lake contro...

  • Page 45: 9. Front Panel Interface

    Plm series operation manual rev 1.1.3 9. Front panel interface 45 9.10.1.4 power output mute the four soft function buttons (5-8) located on the right hand of the screen control the power output mutes of output channels 1-4 respectively. These mutes are located within the plm’s power output stage. W...

  • Page 46: 9. Front Panel Interface

    46 plm series operation manual rev 1.1.3 9. Front panel interface network/ frame status module a input module b input not used channel output 1 channel output 2 channel output 3 channel output 4 1 2 3 4 5 6 7 8 figure 9.10a: front panel soft function buttons in fault/warning mode clip indication the...

  • Page 47: 9. Front Panel Interface

    Plm series operation manual rev 1.1.3 9. Front panel interface 47 figure 9.10c: cpl active figure 9.10d: voltage clip warning or fault indications if certain parameters within the plm approach or exceed preset limits, a warning condition or fault condition may arise. One or more leds will then provi...

  • Page 48: 9. Front Panel Interface

    48 plm series operation manual rev 1.1.3 9. Front panel interface 9.11 warning and fault indications the following table gives indications for warning (yellow) and fault/clip/mute (red) conditions, listed sepa- rately. Additional information in table 11.1. Warning led led number on screen warning te...

  • Page 49: 9. Front Panel Interface

    Plm series operation manual rev 1.1.3 9. Front panel interface 49 9.12 meter mode in meter mode, there are three possible screen displays, referred to as “views”. Pressing the meter button scrolls through the three views in turn: home, module, temperature and input. Each of the four views provides d...

  • Page 50: 9. Front Panel Interface

    50 plm series operation manual rev 1.1.3 9. Front panel interface cl4w -24 home 10000q - - - - low -45 low mid -11 hi mid -13 - ∞ - ∞ - ∞ hi -09 -02 a 1 a 2 a 3 a 4 9.12b: single 4-way crossover configuration this indicates that all four output channels are driven from module a. In general, the four...

  • Page 51: 9. Front Panel Interface

    Plm series operation manual rev 1.1.3 9. Front panel interface 51 home view is the default view. Any names (labels) which have been assigned to the module inputs and outputs are displayed; input and output signal levels can be monitored, and any faults and/or warnings indicated by red or yellow soft...

  • Page 52: 9. Front Panel Interface

    52 plm series operation manual rev 1.1.3 9. Front panel interface 9.12.2 meter view 2 – module view 1 aux -50 cl3w -24 fault/warning module meters v i p l - ∞ v i p l - ∞ v i p l - ∞ v i p l - ∞ a 1 a 2 a 3 b 1 figure 9.12.2: module meter view module view provides further signal level information in...

  • Page 53: 9. Front Panel Interface

    Plm series operation manual rev 1.1.3 9. Front panel interface 53 9.12.3 meter view 3 – temperature view psu dsp 07% 13% temp meters amp vc mag 04% 30° 30° amp vc mag 04% 30° 30° amp vc mag 04% 30° 30° amp vc mag 04% 30° 30° amp vc mag 04% 30° 30° amp vc mag 04% 30° 30° amp vc mag 04% 30° 30° amp vc...

  • Page 55: 9. Front Panel Interface

    Plm series operation manual rev 1.1.3 9. Front panel interface 55 numeric indication in db of the difference between the signal level and the clip level is also provided at the right-hand end of the meter. Line 4 ▸ module fault/warning – in the event of a module fault or warning, text describing the...

  • Page 56: 9. Front Panel Interface

    56 plm series operation manual rev 1.1.3 9. Front panel interface group sum displays some of the plm’s parameters display two values instead of one. The parameters concerned are: module > gain ▸ module > delay ▸ module > limiters > maxrms level ▸ module > limiters > maxpeak level ▸ for each of these...

  • Page 57: 9. Front Panel Interface

    Plm series operation manual rev 1.1.3 9. Front panel interface 57 this allows the module gain to be adjusted at two different places. Soft function buttons 2 and 3 select module a or module b inputs respectively for gain adjustment. Soft function buttons 5-8 select module outputs 1-4 for gain adjust...

  • Page 58: 9. Front Panel Interface

    58 plm series operation manual rev 1.1.3 9. Front panel interface 9.13.2.5.1 inter-sample voltage peak limiter threshold (isvpl threshold) the purpose of the isvpl is to prevent the voltage at the plm’s output terminals exceeding a pre- determined value. Selecting isvpl (soft button 2) permits adjus...

  • Page 59: 9. Front Panel Interface

    Plm series operation manual rev 1.1.3 9. Front panel interface 59 9.13.2.5.7 maxrms release (maxrmsrel) this sets the release time of the maxrms limiter. It is selectable in 0.1 ms increments from 1ms to 500 ms which is the default setting unless another range has been specified in the module settin...

  • Page 60: 9. Front Panel Interface

    60 plm series operation manual rev 1.1.3 9. Front panel interface the options available are as follows: 9.13.3.1 input selection and sensitivity settings this option is selected by pressing soft function buttons 2 or 3 (router 1 or router 2) from menu è input cfg for modules a or b respectively or b...

  • Page 61: 9. Front Panel Interface

    Plm series operation manual rev 1.1.3 9. Front panel interface 61 in auto select mode, the control system inspects the input set as priority 1 for a valid input signal. If none is found, it will proceed to the input set as priority 2, and so on until a valid input signal is found. This polling proce...

  • Page 62: 9. Front Panel Interface

    62 plm series operation manual rev 1.1.3 9. Front panel interface db. This parameter may be adjusted by pressing the associated soft button to highlight the current sensitiv- ity/offset value, and using the rotary encoder. All input selection and sensitivity parameters may also be adjusted from the ...

  • Page 63: 9. Front Panel Interface

    Plm series operation manual rev 1.1.3 9. Front panel interface 63 menu 0.00db 0.00db 0.00db 0.00db attenuation sel all a1: low a2: mid a3: high b4: aux figure 9.13.4: attenuation menu view adjustment of attenuation at the input to the plm’s power stage is available on a per-channel basis. This adjus...

  • Page 64: 9. Front Panel Interface

    64 plm series operation manual rev 1.1.3 9. Front panel interface 9.13.5.2 frame info this option is selected by pressing soft button 3, (frame info) from menu è frame. It provides the user with various fixed information about the plm and its current settings. This display shows data only, which can...

  • Page 65: 9. Front Panel Interface

    Plm series operation manual rev 1.1.3 9. Front panel interface 65 9.13.5.2.3 max output voltage (‘maxoutvolt’) this displays the maximum output voltage that can exist across the plm’s output terminals. (note this is the absolute maximum, not the voltage defined by the isvpl setting.) 9.13.5.2.4 max ...

  • Page 66: 9. Front Panel Interface

    66 plm series operation manual rev 1.1.3 9. Front panel interface the information displayed is: block 2: ip address ▸ block 3: mac address ▸ block 4: frame id ▸ block 5: network status: ▸ primary network connection * secondary network connection * lake controller software on/off-line * block 6: ip m...

  • Page 67: 9. Front Panel Interface

    Plm series operation manual rev 1.1.3 9. Front panel interface 67 9.13.5.6.2 dimming press soft button 3 and use the rotary encoder to adjust the display backlight. Four levels of dimming are available. 9.13.5.6.3 channel order press soft button 4 and use the rotary encoder to adjust the channel ord...

  • Page 68: 9. Front Panel Interface

    68 plm series operation manual rev 1.1.3 9. Front panel interface 9.13.7.2 loadsmart verification loadsmart load verification may be initiated by pressing soft button 3, and then pressing it again (“yes”) from the the check page that follows. Loadsmart performs a rapid test of all output channels, a...

  • Page 69: 9. Front Panel Interface

    Plm series operation manual rev 1.1.3 9. Front panel interface 69 9.13.8 dante this submenu is selected by pressing soft button 8, labelled dante from the menu top page. If dante has not been enabled in the lake controller software, the submenu will not be available and a notification to this effect...

  • Page 70: 10. Back Panel Interface

    70 plm series operation manual rev 1.1.3 10. Back panel interface 10. Back panel interface 10.1 power inlet a neutrik nac3 series powercon connector rated at 32 a is fitted to the rear of the plm for ac mains input. The power cable (ac cord) supplied with the plm has the mating connector ready-fitte...

  • Page 71: 10. Back Panel Interface

    Plm series operation manual rev 1.1.3 10. Back panel interface 71 10.2.1.1 unbalanced operation balanced interconnections are recommended whenever possible. However, if it is necessary to drive the plm from equipment with an unbalanced output, wire the inputs as shown in the diagram below: 1 2 3 col...

  • Page 72: 10. Back Panel Interface

    72 plm series operation manual rev 1.1.3 10. Back panel interface 10.2.2 digital inputs and links aes/ebu input 1-2 link 1-2 figure 10.2.2: rear panel aes digital connectors the aes/ebu digital audio input is on an xlr3f connector, which is directly paralleled to the adjacent xlr3m aes/ebu link conn...

  • Page 73: 10. Back Panel Interface

    Plm series operation manual rev 1.1.3 10. Back panel interface 73 factory tests indicate that it may be possible to connect up to 20 plms in this way, but the number achievable in any given situation may be less than this. See section 12.5 for further information on interconnecting digital audio equ...

  • Page 74: 10. Back Panel Interface

    74 plm series operation manual rev 1.1.3 10. Back panel interface pin no. Nl4 #1 chs. 1 & 2 nl8 chs. 1 - 4 nl4 #2 chs. 3 & 4 1+ channel 1 o/p + channel 1 o/p + channel 3 o/p + 1- channel 1 o/p - channel 1 o/p - channel 3 o/p - 2+ channel 2 o/p + channel 2 o/p + channel 4 o/p + 2- channel 2 o/p - cha...

  • Page 75: 10. Back Panel Interface

    Plm series operation manual rev 1.1.3 10. Back panel interface 75 10.3.2 binding post output connectors ch 2 ch 1 ch 4 ch 3 class 2 wiring speaker outputs figure 10.3.2a: rear panel binding post field for 4-channel plms speaker outputs ch 1 ch 1 ch 2 ch 2 class 3 wiring figure 10.3.2b: rear panel bi...

  • Page 76: 10. Back Panel Interface

    76 plm series operation manual rev 1.1.3 10. Back panel interface may be used for linking multiple plms, or alternatively for connection of a secondary network for full redundancy. The network connections on the plm auto-sense whether standard (‘straight’) or ‘crossed’ cat-5e cables are in use, and ...

  • Page 77: 11. Appendix

    Plm series operation manual rev 1.1.3 11. Appendix 77 11. Appendix 11.1 faults and warnings overview the various fault or warning conditions that may arise in the plm are indicated by the tricolor leds in the eight soft function buttons around the display. Because each led indicates several types of...

  • Page 78: 11. Appendix

    78 plm series operation manual rev 1.1.3 11. Appendix displayed text event log text category type description over spkr cnt over speaker count warning more speakers a lower load impedance has been measured than was predicted by the load library for the assigned speaker type. Pal active n/a fault pow...

  • Page 79: 11. Appendix

    Plm series operation manual rev 1.1.3 11. Appendix 79 11.2 maintenance during normal operation your plm will provide trouble-free service. The main user maintenance is to periodically clean the dust filters behind the front grilles. The two grilles can be removed by undoing the knurled-head screws, ...

  • Page 80: 11. Appendix

    80 plm series operation manual rev 1.1.3 11. Appendix 11.4 current draw and thermal dissipation specifications table 11.4 contains data on measured current consumption and calculated heat dissipation for four operating conditions: i) power on, no signal; ii) normal operation (1/8 of rated power); ii...

  • Page 81: 11. Appendix

    Plm series operation manual rev 1.1.3 11. Appendix 81 plm 10000q level load rated power line current *2) watt *1) thermal dissipation 120 vac 230 vac in out dissipated btu/hr kcal/hr standby with remote power off via nomadlink 4.8 0 4.8 16 4 powered on, idling. 145 0 145 496 125 amp (i) watt pink no...

  • Page 82: 11. Appendix

    82 plm series operation manual rev 1.1.3 11. Appendix 11.5 glossary of terms, acronyms and abbreviations the explanations given in table 11.6 are based on the specific use of each term in this manual. The defini- tions are not intended to be exhaustive. Many of the terms have wider meanings! Term de...

  • Page 83: 11. Appendix

    Plm series operation manual rev 1.1.3 11. Appendix 83 term description floating an analog balanced input or output is said to be floating when full electrical isolation exists between that input or output and the equipment connected to it. Transformer-coupled inputs and outputs are inherently floati...

  • Page 84: 11. Appendix

    84 plm series operation manual rev 1.1.3 11. Appendix term description 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 aes/ebu, thi...

  • Page 85: 12. Application Guide

    Plm series operation manual rev 1.1.3 12. Application guide 85 12. Application guide figure 12.1: example i/o connector panel for a rack with 2 four-channel plms 12.1 i/o panels system interconnection on-site is made quicker and simpler if racks are prewired internally to connection panels. If the p...

  • Page 86: 12. Application Guide

    86 plm series operation manual rev 1.1.3 12. Application guide two racks, each with three 230 v version plms and a 30 a three-phase mains supply. In the rack the ▸ plms are connected between the phases, i.E. One between phase 1 and 2, one between phase 2 and 3 and the last between phase 3 and 1. Eac...

  • Page 87: 12. Application Guide

    Plm series operation manual rev 1.1.3 12. Application guide 87 input gain this is used to adjust the level between different cabinets in the system. It should be left at 0 db unless you want to lower the level for the cabinet(s) driven by this module (adjustments made in i/o config, module pane). Mo...

  • Page 88: 12. Application Guide

    88 plm series operation manual rev 1.1.3 12. Application guide headroom is not introduced on the input side that is unused or unreasonably high. If full power is not required, or at least not a high average power, you may also lower the gain on the input of the module. Figures 12a through 12.2c demo...

  • Page 89: 12. Application Guide

    Plm series operation manual rev 1.1.3 12. Application guide 89 as can be seen to the left, 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. When using analog i...

  • Page 90: 12. Application Guide

    90 plm series operation manual rev 1.1.3 12. Application guide when using analog inputs (continued): figure 12.2c illustrates how moderate noise with extreme spl can be achieved. The reason why the spl will be extremely high here is that so much headroom is available at the input and withiin the pro...

  • Page 91: 12. Application Guide

    Plm series operation manual rev 1.1.3 12. Application guide 91 12.4 speaker configurations connecting two speakers in parallel to a plm power output presents a load to the amplifier which is half the impedance of that presented by one speaker. Thus the current that two speakers will attempt to draw ...

  • Page 92: 12. Application Guide

    92 plm series operation manual rev 1.1.3 12. Application guide pin 1: ground/shield pin 2: hot (+) pin 3: cold (-) figure 12.5.1: aes connector wiring and pinout aes/ebu is a serial transmission format for linearly represented (uncompressed) digital audio data. It describes a method for carrying two...

  • Page 93: 12. Application Guide

    Plm series operation manual rev 1.1.3 12. Application guide 93 aes/ebu input on the first plm. Connect the adjacent link output on the same unit to the input on the next plm, and continue connecting in this manner. As many as 20 plm units may be daisy-chained in this man- ner, though the total may b...

  • Page 94: 12. Application Guide

    94 plm series operation manual rev 1.1.3 12. Application guide when not needed, re-clocking can introduce small additional amounts of latency. (re-clocking also can interfere with surround-sound encoders, but this is rarely a concern in live sound applications.) 12.5.4.2 passive splitters in some li...

  • Page 95: 12. Application Guide

    Plm series operation manual rev 1.1.3 12. Application guide 95 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 t...

  • Page 96: 12. Application Guide

    96 plm series operation manual rev 1.1.3 12. Application guide figure 12.7: digital clock setup page the default configuration is auto 48 detection, which is appropriate for most professional audio applications. For further information on the user interface please refer to the dolby lake controller ...

  • Page 97: 12. Application Guide

    Plm series operation manual rev 1.1.3 12. Application guide 97 12.7.1 firmware upgrades using the update utility the firmware upsate utility allows fast upgrade for large networks of dolby lake-equipped products. Follow the steps shown below to use this method for firmware upgrade. Install the lates...

  • Page 98: 12. Application Guide

    98 plm series operation manual rev 1.1.3 12. Application guide 12.7.1b: firmware update utility step two tap 6. Update; tap ok to the warning message. 12.7.1c: firmware update utility step three the plms will be updated with the latest firmware. A green tick indicates successful update and the 7. Pe...

  • Page 99: 12. Application Guide

    Plm series operation manual rev 1.1.3 12. Application guide 99 12.7.1d: firmware update utility step four wait for all selected plms to be upgraded and the information message to appear. 8..

  • Page 100: 100

    100 plm series operation manual rev 1.1.3 12. Application guide cycle the power of each plm by turning the power switch off, and then either removing the powercon 9. Connector from the rear of each plm or switching off all power to the plm racks at source. Then reconnect the power and switch the plm...

  • Page 101: 12. Application Guide

    Plm series operation manual rev 1.1.3 12. Application guide 101 read the onscreen warning message, tapping 7. Yes to proceed. When all processors have been updated, cycle the power of each plm by turning the power switch off, 8. And then either removing the powercon connector from the rear of each p...

  • Page 103: 13. Technical Specifications

    Plm series operation manual rev 1.1.3 13. Technical specifications 103 general number of input channels 2 number of output channels 4 peak total output all channels driven 10800 w max. Peak output voltage per channel 153 v max. Output current per channel 49 a peak max. Output power 2 ohms 4 ohms 8 o...

  • Page 104: 104

    104 plm series operation manual rev 1.1.3 14. 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...

  • Page 105: 14. Warranty

    Plm series operation manual rev 1.1.3 14. Warranty 105 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. ...

  • Page 106

    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 a n a d a c o n t a c t ► i n f o @ t c g - a m e r i c a s . C o m w w w . L a b g r u p p e n . C o m operation manual.