1. DL manuals
  2. Lab.gruppen
  3. Speakers
  4. PLM Series
  5. Operation Manual

Lab.gruppen PLM Series Operation Manual

Manual is about: Powered Loudspeaker Management systems

Summary of PLM Series

  • Page 1

    Plm ™ series powered loudspeaker management ™ systems rev 1.1.9 item: om-plm operation manual.

  • Page 2

    Important safety instructions i plm series operation manual rev 1.1.9 1. Important safety instructions before using the device, be sure to carefully read the safety instructions. Keep this document with the device at all times. 1.1 important safety instructions 1. Read these instructions. 2. Keep th...

  • Page 3

    Ii important safety instructions plm series operation manual rev 1.1.9 1.4 warning to reduce risk of fire or electric shock, do not expose this apparatus to rain or moisture. Pour réduire les risques de blessure ou le choc électrique, n’exposez pas l’appareil à la pluie ou à l’humidité. Do not expos...

  • Page 4: III

    Important safety instructions iii plm series operation manual rev 1.1.9 ▸ check if the affected unit complies with the emc limits for immunity, (ce-labeled). If not, address the problem with the manufacturer or supplier. All electrical products sold in the ec must be approved for immunity against el...

  • Page 5: Table of Contents

    Iv plm series operation manual rev 1.1.9 table of contents 1. Important safety instructions ................................................................................................................I 1.1 important safety instructions ...............................................................

  • Page 6

    V plm series operation manual rev 1.1.9 7.5 meter button .....................................................................................................................................33 7.6 menu button ..............................................................................................

  • Page 7: Welcome

    Welcome 1 plm series operation manual rev 1.1.9 2. Welcome 2.1 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, configuration f...

  • Page 8: Welcome

    2 welcome plm series operation manual rev 1.1.9 2.2.2.1 input gain (sensitivity) input gain (sensitivity) is set in the digital domain for plm series devices, and may be controlled via the lake controller software or front-panel interface. 2.2.2.2 isvpl ™ the inter-sample voltage peak limiter (isvpl...

  • Page 9: Welcome

    Welcome 3 plm series operation manual rev 1.1.9 smaart, distributed and supported by rational acoustics, provides real-time sound system measurement, optimization and control. Smaart combines several powerful audio frequency measurement and analysis tools. Live-capture, created by wavecapture, offer...

  • Page 10: Installation

    4 installation plm series operation manual rev 1.1.9 3. Installation 3.1 unpacking carefully open the shipping carton and check for any damage to the device or the supplied accessories. Every lab.Gruppen product is tested and inspected before leaving the factory and should arrive in perfect conditio...

  • Page 11: Installation

    Installation 5 plm series operation manual rev 1.1.9 figure 3-1: rear support bracket and mounting hardware figure 3-2: use the washer for fixed installations figure 3-3: use tube for slide-on installation.

  • Page 12: Installation

    6 installation plm series operation manual rev 1.1.9 3.3 cooling 3.3.1 overview the plm series devices use 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...

  • Page 13: Installation

    Installation 7 plm series operation manual rev 1.1.9 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 75 h...

  • Page 14: Installation

    8 installation plm series operation manual rev 1.1.9 use correctly-shielded balanced audio input connections to minimise hum and interference. Please refer to section 8.2.4 for further information. Never disconnect the earth (ground) pin on the mains cable (ac power cord)..

  • Page 15: Product Overview

    Product overview 9 plm series operation manual rev 1.1.9 4. Product overview this chapter provides and overview of key features and functionality. For further information please see chapters 5 to 10 of this operation manual. 4.1 front panel overview figure 4-1: plm front panel overview the front pan...

  • Page 16: Product Overview

    10 product overview plm series operation manual rev 1.1.9 display the display illuminates when the device is on. The lcd, function buttons, and the rotary encoder provide real-time control and monitoring of most parameters. The leds embedded in the function buttons indicate available menu options, p...

  • Page 17: Product Overview

    Product overview 11 plm series operation manual rev 1.1.9 please refer to chapter 7 for further details. Dynamic function buttons with leds (right of lcd) the function of these buttons change according to the currently selected view or menu. ▸ in menu mode they are used for menu navigation and for p...

  • Page 18: Product Overview

    12 product overview plm series operation manual rev 1.1.9 4.2 back panel overview figure 4-2: back panel layout options for four-channel plm figure 4-3: back panel layout options for 2-channel plm.

  • Page 19: Product Overview

    Product overview 13 plm series operation manual rev 1.1.9 4.2.1 input and link connectors analog inputs analog inputs are available on two standard xlr3f latching connectors. The inputs are electronically balanced and feature lake iso-float circuitry. The impedance is 20 kohms, and the inputs can ac...

  • Page 20: Product Overview

    14 product overview plm series operation manual rev 1.1.9 please email plmsupport@labgruppen.Com for further information on bridge-mode operation. Binding posts in this version, the power outputs for loudspeaker connection are available on four separate pairs of fully enclosed binding posts. (channe...

  • Page 21: Product Overview

    Product overview 15 plm series operation manual rev 1.1.9 secondary connector the secondary network connector can be used to daisy-chain multiple plm series, lm 26 and legacy lake devices. Alternatively, a dual-network topology can be created by connecting all secondary network connec- tors to a sep...

  • Page 22: Operation and Performance

    16 operation and performance plm series operation manual rev 1.1.9 5. Operation and performance this chapter provides comprehensive information on plm series connection, setup, operation and perfor- mance. The detailed information included here is essential to realizing the full functionality of the...

  • Page 23: Operation and Performance

    Operation and performance 17 plm series operation manual rev 1.1.9 5.2.2 asymmetrical power the plm models can deliver power as shown in table 5-2 when every other channel is driven 3 db lower than the other. This can occur when the load on the individual power output channels within the amplifier c...

  • Page 24: Operation and Performance

    18 operation and performance plm series operation manual rev 1.1.9 in reality, when some channels are delivering less than maximum rated power, energy reserves in the psu are available to permit other channels to deliver more power. The graph shows the peak output voltage over time for a continuous ...

  • Page 25: Operation and Performance

    Operation and performance 19 plm series operation manual rev 1.1.9 5.3.1.2 high spl profiles high spl profiles do not use the adaptive release time feature. High spl profiles optimized for high frequen- cies use less of the look-ahead delay peak-rounding feature; this feature is used most in the sub...

  • Page 26: Operation and Performance

    20 operation and performance plm series operation manual rev 1.1.9 the isvpl threshold may be set at any level between 17.8 v and 194 v via the plm’s menu system. For further details, please refer to section 7.11.2.5 of this manual, and also to the plm series chapter in the lake controller user manu...

  • Page 27: Operation and Performance

    Operation and performance 21 plm series operation manual rev 1.1.9 5.3.4 breaker emulation limiter (bel ™ ) the breaker emulation limiter is present in the plm 20000q. The plm 20000q is a powerful amplifier that can draw a considerable current from the mains supply. The bel models the temperature in...

  • Page 28: Operation and Performance

    22 operation and performance plm series operation manual rev 1.1.9 5.3.8 temperature protection 5.3.8.1 overview plm series devices are equipped with a sophisticated temperature sensing system that provides protection from overheating which may occur as a result of inadequate ventilation or excessiv...

  • Page 29: Operation and Performance

    Operation and performance 23 plm series operation manual rev 1.1.9 5.3.9 dc protection 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 breaker to blow. In this insta...

  • Page 30: Operation and Performance

    24 operation and performance plm series operation manual rev 1.1.9 figure 5-3: 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- mented solely to detect continuous vhf content. Hf content of normal music or...

  • Page 31: Operation and Performance

    Operation and performance 25 plm series operation manual rev 1.1.9 5.4.1 low inrush current high power amplifiers with inadequate inrush current limiting can draw considerable current from the mains at turn-on, sometimes tripping a fast-acting mains breaker. The plm, however, has very low inrush cur...

  • Page 32

    26 signal flow and lake processing plm series operation manual rev 1.1.9 6. Signal flow and lake processing 6.1 signal flow figure 6-1 and figure 6-2 depict the audio signal flow inside a plm. It is worth noting that this sophisticated device provides seven points in the signal chain where the signa...

  • Page 33

    Signal flow and lake processing 27 plm series operation manual rev 1.1.9 attenuation stage - power output channel mute and attenuation settings amp gain stage - amplifier gain control if the required audio signal is not passing correctly, verify the connection, mute and volume settings at all seven ...

  • Page 34

    28 signal flow and lake processing plm series operation manual rev 1.1.9 been rectified or the incorrect setting has been readjusted. Sensing circuits also transmit local output power stage temperature, processor card temperature, and psu temperature to the appropriate protection circuits. Please re...

  • Page 35

    Signal flow and lake processing 29 plm series operation manual rev 1.1.9 please refer to the lake controller operation manual for further information. 6.3.2 loadlibrary ™ and fingerprints in addition to the standard loudspeaker presets (module files), the lake controller also includes a set of enhan...

  • Page 36

    30 signal flow and lake processing plm series operation manual rev 1.1.9 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 ...

  • Page 37: Front Panel Interface

    Front panel interface 31 plm series operation manual rev 1.1.9 7. Front panel interface an overview of the front panel interface is provided in section 4.1. This chapter describes each cluster of controls as shown in figure 7-1. Figure 7-1: front panel interface 7.1 overview the majority of plm func...

  • Page 38: Front Panel Interface

    32 front panel interface plm series operation manual rev 1.1.9 7.1.3 highlighting a module in the lake controller software via the plm it is sometimes useful to identify which module icon/s in the lake controller software are associated with a particular hardware frame. To highlight the module in th...

  • Page 39: Front Panel Interface

    Front panel interface 33 plm series operation manual rev 1.1.9 7.4 mute enable button the dynamic function buttons to the immediate left and right of the lcd are used as mute buttons only when the mute enable button is activated (flashing). When mute enable is activated, the two central buttons on t...

  • Page 40: Front Panel Interface

    34 front panel interface plm series operation manual rev 1.1.9 7.8 dynamic buttons, controls and leds figure 7-3: lcd with dynamic buttons, controls and leds 7.8.1 communication led this bright white led signifies selection in the lake controller, or controller communication providing visual confirm...

  • Page 41: Front Panel Interface

    Front panel interface 35 plm series operation manual rev 1.1.9 7.8.3 rotary encoder the rotary encoder is used to adjust parameters in conjunction with the selection made via the dynamic function buttons and lcd menus. The ring around the rotary encoder illuminates when a selected parameter is avail...

  • Page 42: Front Panel Interface

    36 front panel interface plm series operation manual rev 1.1.9 7.8.4.1 mute functions the plm provides mute functions at several different points in its audio chain. Please refer to section 6.1 for further information. The four types of mute are: 1. Plm input mute 2. Module input mute 3. Module outp...

  • Page 43: Front Panel Interface

    Front panel interface 37 plm series operation manual rev 1.1.9 7.8.4.3 module input mute the module input mute provides the ability to mute/unmute the audio signal at the module level. Therefore, the plm input (described in 7.8.4.2) remains unmuted and can be used by another module, or directly rout...

  • Page 44: Front Panel Interface

    38 front panel interface plm series operation manual rev 1.1.9 fault condition led indications take priority over mute status indications. If a fault condition occurs, the led will indicate the fault and not the mute status. 7.8.5 led fault, warning and clip indication a tricolor led is embedded ins...

  • Page 45: Front Panel Interface

    Front panel interface 39 plm series operation manual rev 1.1.9 if cpl protection is active, or a voltage clip occurs, then the associated power output channel led will flash red and a text warning will also be displayed on the screen. 7.8.5.2 warning or fault indications if certain parameters within...

  • Page 46: Front Panel Interface

    40 front panel interface plm series operation manual rev 1.1.9 fault/clip/mute led led no. On screen warning text event log text no input source available module 2+3 n/a frame fault: no input source internal audio interface fault frame 1 audio fault frame fault: audio interface power channel temp fa...

  • Page 47: Front Panel Interface

    Front panel interface 41 plm series operation manual rev 1.1.9 7.10 meter mode 7.10.1 home view the default view when powering on the device is meter mode > home view as shown in figure 7-4. Figure 7-4: meter mode > home view home view provides a summary of module i/o gain level and limiter gain red...

  • Page 48: Front Panel Interface

    42 front panel interface plm series operation manual rev 1.1.9 output limiter (gain reduction) meters take into account the sum of plm isvpl and lake limitermax. Home view looks similar for most configurations, with slight variations dependant on the plm model and processor configuration, for instan...

  • Page 49: Front Panel Interface

    Front panel interface 43 plm series operation manual rev 1.1.9 output 4: v - voltage meter i - current meter p - power meter l - gain reduction meter ▸ the voltage meter (v) indicates the plm’s power output stage voltage relative to its clip level ▸ the current meter (i) indicates the current the po...

  • Page 50: Front Panel Interface

    44 front panel interface plm series operation manual rev 1.1.9 ▸ amp indicates the current actual temperature of that channel’s power output stage as a percentage of its maximum permitted value. The numerical value is in db relative to signal clip. ▸ the computed temperature of voice coil (vc) of th...

  • Page 51: Front Panel Interface

    Front panel interface 45 plm series operation manual rev 1.1.9 7.11 menu mode 7.11.1 overview the majority of functions can accessed via menu mode on the front panel. These functions include the adjustment of gain, delay, limiters, input and output routing, and the ability to recall frame presets. M...

  • Page 52: Front Panel Interface

    46 front panel interface plm series operation manual rev 1.1.9 ▸ module > limiters > maxpeak level the module parameter can be adjusted using the rotary encoder. The group total (shown in brackets) is only adjustable using the groups function in the lake controller. The group total is the sum of the...

  • Page 53: Front Panel Interface

    Front panel interface 47 plm series operation manual rev 1.1.9 for simplicity, the following sections refer to the buttons by their associated name on the lcd screen. E.G. ‘press gain’ equates to ‘press the button adjacent to the gain label on the lcd’. 7.11.2 module submenu menu > module after sele...

  • Page 54: Front Panel Interface

    48 front panel interface plm series operation manual rev 1.1.9 press the illuminated button next to the input/s and/or output/s for adjustment, and use the rotary encoder to change the value/s. Multiple gain values may be adjusted simultaneously in 0.1 db increments, subject to defined level limits....

  • Page 55: Front Panel Interface

    Front panel interface 49 plm series operation manual rev 1.1.9 7.11.2.5 limiters menu > module > limiters various parameters of the plm’s inter-sample voltage peak limiter (isvpl) and the lake limitermax pa- rameters can be adjusted via this submenu. By default, simultaneous adjustment of most limit...

  • Page 56: Front Panel Interface

    50 front panel interface plm series operation manual rev 1.1.9 maxrms corner (maxrmscor) a soft-knee or hard-knee corner may be applied to the rms limiter. A soft-knee corner gently increases limiting as the signal approaches the threshold; a hard-knee corner applies full limiting to any signal exce...

  • Page 57: Front Panel Interface

    Front panel interface 51 plm series operation manual rev 1.1.9 7.11.3.1 router 1 / 2 menu > i/o config > router 1 / 2 figure 7-12: input router 1 figure 6-1 on page 26 shows that there are two input routers available on plm series devices. The input that is selected within the router can be used by ...

  • Page 58: Front Panel Interface

    52 front panel interface plm series operation manual rev 1.1.9 assignment of input priority factory default settings assign aes3 to priority 1 and analog to priority 4, with priority 2 and 3 empty. To change these settings via the front panel, select priority slot number to be changed and use the ro...

  • Page 59: Front Panel Interface

    Front panel interface 53 plm series operation manual rev 1.1.9 7.11.3.3 iso-float menu > i/o config > iso-float figure 7-14: iso-float menu to change the iso-float setting, adjust the value using the rotary encoder. The current settings are also displayed on the front panel i/o status screen. The an...

  • Page 60: Front Panel Interface

    54 front panel interface plm series operation manual rev 1.1.9 adjustment of attenuation at the input to the plm power stage is available on a per-channel basis. This adjustment is the plm equivalent of a conventional amplifier level control. The power output channels may be turned down using these ...

  • Page 61: Front Panel Interface

    Front panel interface 55 plm series operation manual rev 1.1.9 firmware version (fw version) this option displays the version numbers for various firmware elements. This information can be used to verify that the latest firmware is installed and is useful if a technical issue arises. Inherent latenc...

  • Page 62: Front Panel Interface

    56 front panel interface plm series operation manual rev 1.1.9 soft reset a soft reset will reset all settings and parameters to the original factory-defined default values, but retains frame preset information and ip / network configuration. A power cycle is not required to complete this type of re...

  • Page 63: Front Panel Interface

    Front panel interface 57 plm series operation manual rev 1.1.9 7.11.6 front panel display controls menu > frame > front figure 7-17: front panel display controls menu contrast to adjust the front panel lcd contrast, select this option then use the rotary encoder to change the value. Dimming to adjus...

  • Page 64: Front Panel Interface

    58 front panel interface plm series operation manual rev 1.1.9 to recall an existing frame preset, use the rotary encoder to select the required preset then press the recall button to overwrite the current configuration. Frame presets must initially be created in the lake controller, and stored as a...

  • Page 65: Front Panel Interface

    Front panel interface 59 plm series operation manual rev 1.1.9 figure 7-20: loadsmart verification results screen the load results page provides four items of information per output channel: ▸ confirmation of the speaker fingerprint assigned to the channel. If no fingerprint is assigned, no model wi...

  • Page 66: Front Panel Interface

    60 front panel interface plm series operation manual rev 1.1.9 7.11.9 dante menu > dante figure 7-21: dante menu pressing the dante button from the main menu will display this screen only if dante has previously been enabled via the lake controller software. Please refer to the lake controller opera...

  • Page 67: Back Panel Interface

    Back panel interface 61 plm series operation manual rev 1.1.9 8. Back panel interface an overview of the back panel interface is provided in section 4.2. This chapter describes each cluster of connections as shown in figure 8-1. Figure 8-1: back panel interface 8.1 speaker outputs the plm is availab...

  • Page 68: Back Panel Interface

    62 back panel interface plm series operation manual rev 1.1.9 ss 3 wiring speaker outputs 1 /- ch 1 /- 2 /- ch 2 /- 1 /- ch 2 /- 2 /- ch 1 /- figure 8-2: speakon connections for two-channel plms pin no. Nl4 #1 ch. 1 & 2 nl4 #2 ch. 2 & 1 1+ ch. 1 o/p + ch. 2 o/p + 1- ch. 1 o/p - ch. 2 o/p - 2+ ch. 2 ...

  • Page 69: Back Panel Interface

    Back panel interface 63 plm series operation manual rev 1.1.9 2 wiring speaker outputs 1 /- ch 1 /- 2 /- ch 2 /- 1 /- ch 1 /- 2 /- ch 2 /- 3 /- ch 3 /- /- ch /- 1 /- ch 3 /- 2 /- ch /- figure 8-4: speakon connections for four-channel plms pin no. Nl4 #1 ch. 1 & 2 nl8 ch. 1 - 4 nl4 #2 ch. 3 & 4 1+ ch...

  • Page 70: Back Panel Interface

    64 back panel interface plm series operation manual rev 1.1.9 8.1.2 binding post connectors binding post versions of the plm are fitted with four pairs of black and red 4 mm binding posts. Four-channel plms provide the output for one power output channel on each pair of binding posts as shown in fig...

  • Page 71: Back Panel Interface

    Back panel interface 65 plm series operation manual rev 1.1.9 8.2 analog inputs and outputs 8.2.1 analog input and link xlr connections two electronically-balanced analog inputs are provided via latching xlr3f connections. The link outputs on xlr3m connectors are directly paralleled to the inputs. I...

  • Page 72: Back Panel Interface

    66 back panel interface plm series operation manual rev 1.1.9 8.2.3 unbalanced operation balanced connections are recommended where possible. However, if it is necessary to drive the device from equipment with an unbalanced output, wire the inputs as shown in figure 8-10. 1 2 3 cold hot scrn cold ho...

  • Page 73: Back Panel Interface

    Back panel interface 67 plm series operation manual rev 1.1.9 8.3 aes3 digital i/o 8.3.1 aes3 xlr connector aes/ebu digital audio input is via an xlr3f connector, which is directly paralleled to the adjacent xlr3m aes/ebu link connector. Wiring of this connector follows the same standard as for anal...

  • Page 74: Back Panel Interface

    68 back panel interface plm series operation manual rev 1.1.9 8.4 rj45 ethercon ® network connections two rj45 ethercon style network connections are provided as shown in figure 8-13. Switched 100/1000 base-t link prim act sec link act figure 8-13: ethercon network connectors the network connections...

  • Page 75: Back Panel Interface

    Back panel interface 69 plm series operation manual rev 1.1.9 8.4.1 primary network connection the primary network connection is used for lake controller connectivity and dante digital audio. Please refer to section 4.2 for additional information. 8.4.2 secondary network connection the secondary net...

  • Page 76: Appendix

    70 appendix plm series operation manual rev 1.1.9 9. Appendix 9.1 faults and warnings overview fault or warning conditions are indicated by the led shown in figure 7-3 on page 34, and also by leds associ- ated with the inputs and outputs on the plm. As the leds indicate several types of faults or wa...

  • Page 77: Appendix

    Appendix 71 plm series operation manual rev 1.1.9 displayed text event log text category type description module clip n/a clip module output clip the signal level on the outputs of the dolby lake processing module is too high and is clipping. N/a frame fault: no input source fault no input source th...

  • Page 78: Appendix

    72 appendix plm series operation manual rev 1.1.9 displayed text event log text category type description temp flt:psu temp fault: power supply unit fault power supply temperature the temperature of the plm’s psu has exceeded its safety limit. Temp flt:vc temp fault: speaker voice coil fault speaker...

  • Page 79: Appendix

    Appendix 73 plm series operation manual rev 1.1.9 9.2 maintenance during normal operation this devices provides trouble-free service. If the lcd or front panel display requires cleaning, use a soft cloth only; do not use solvent cleaners. The dust filters on both sides of the front panel, behind the...

  • Page 80: Appendix

    74 appendix plm series operation manual rev 1.1.9 9.3.2 input and router defaults autoselect: on input sensitivity: +26 dbu dante: disabled aes3: terminated iso-float: enabled router 1: aes1 (ch.1) as priority 1, analog 1 as priority 4 router 2: aes1 (ch.2) as priority 1, analog 2 as priority 4 9.3....

  • Page 81: Appendix

    Appendix 75 plm series operation manual rev 1.1.9 table 9-2: plm 14000 current draw and thermal dissipation.

  • Page 82: Appendix

    76 appendix plm series operation manual rev 1.1.9 table 9-3: plm 10000q current draw & thermal dissipation.

  • Page 83: Appendix

    Appendix 77 plm series operation manual rev 1.1.9 9.5 glossary of terms, acronyms and abbreviations the explanations given in table 9-4 below are based on the specific use of each term in this manual. The definitions are not intended to be exhaustive and many of these terms have wider meanings. Term...

  • Page 84: Appendix

    78 appendix plm series operation manual rev 1.1.9 term description frame id an electronic identification ‘label’ which can be given to each frame in an amplification system. Naming frames in a large system is desirable as it simplifies identification in the lake controller. Frame preset frame preset...

  • Page 85: Appendix

    Appendix 79 plm series operation manual rev 1.1.9 term description pass-through cable see straight network cable. Ping ping is a term coined by the it industry to the procedure of sending a command over a network to a particular ethernet device asking it to confirm its identity and possibly reply wi...

  • Page 86: Application Guide

    80 application guide plm series operation manual rev 1.1.9 10. Application guide this chapter describes the practical application and use of plm series devices. 10.1 rack i/o panels for fast and simple system connection, pre-wired racks using connection panels can be used. With an i/o connector pane...

  • Page 87: Application Guide

    Application guide 81 plm series operation manual rev 1.1.9 1. Three racks, each with two plms and a 32 a single-phase mains supply. The 32 a capacity is shared between the two plms within the rack. This is beneficial as the two plms don’t have to draw the same current. The only limitation is that in...

  • Page 88: Application Guide

    82 application guide plm series operation manual rev 1.1.9 to adjust, navigate to i/o config > input configuration in the lake controller. Please refer to the lake controller operation manual for further details. 10.3.2 input mixer input mixer gains can remain at 0.00 db for most configurations; if ...

  • Page 89: Application Guide

    Application guide 83 plm series operation manual rev 1.1.9 10.3.6 amp gain the amp gain corresponds to the gain adjustment in a conventional separate loudspeaker processor and amplifier system. When using a pre-defined module loudspeaker preset file, the amp gain settings will normally remain as def...

  • Page 90: Application Guide

    84 application guide plm series operation manual rev 1.1.9 -250,0 -200,0 -150,0 -100,0 -50,0 0,0 50,0 100,0 analog aes input input mixer module in module out amp attenuation analog ref amp gain isvpl output db /d b u clip nominal noise figure 10-2: digital input: low noise with good headroom (high i...

  • Page 91: Application Guide

    Application guide 85 plm series operation manual rev 1.1.9 ▸ absolute noise floor: -71.5 dbu ▸ spl is limited to -8.9 db relative to clip in this minimum absolute noise level example -140,0 -120,0 -100,0 -80,0 -60,0 -40,0 -20,0 0,0 20,0 40,0 60,0 analog aes input input mixer module in module out amp...

  • Page 92: Application Guide

    86 application guide plm series operation manual rev 1.1.9 ▸ absolute noise floor: -71.3 dbu -140.0 -120.0 -100.0 -80.0 -60.0 -40.0 -20.0 0.0 20.0 40.0 60.0 analog aes input input mixer module in module out amp attenuation analog ref amp gain isvpl output db /d bu clip nominal noise figure 10-6: ana...

  • Page 93: Application Guide

    Application guide 87 plm series operation manual rev 1.1.9 two types of digital audio inputs are available: dante networked multi-channel digital audio, and two-channel digital audio via the aes3. Dante-based system configurations and interconnections are explained in a separate document, the lake n...

  • Page 94: Application Guide

    88 application guide plm series operation manual rev 1.1.9 the input and link connectors are identical for the analog and digital inputs, so care must be taken when connecting audio, particularly when analog inputs are used as a backup signal source. Connectors should be clearly labeled to prevent a...

  • Page 95: Application Guide

    Application guide 89 plm series operation manual rev 1.1.9 10.6.3.4 signal degradation and loss a weak or degraded aes3 signal will exhibit no audible loss of quality as long as the robustness of the data stream remains above the threshold required for internal error correction. As degradation appro...

  • Page 96: Application Guide

    90 application guide plm series operation manual rev 1.1.9 10.7 digital clock configuration 10.7.1 digital clock overview in order to provide a flexible and robust audio processing system, the plm is equipped with a configurable digital clocking system. The digital clock can generate various indepen...

  • Page 97: Application Guide

    Application guide 91 plm series operation manual rev 1.1.9 for manual configuration, the selected internal or external clock source remains fixed regardless of whether a compatible clock signal is preset. For automatic detection, the most appropriate clock matching the selected base-rate is automati...

  • Page 98: Technical Specifications

    92 technical specifications plm series operation manual rev 1.1.9 11. Technical specifications s cifi cat ons plm series model number of input channels number of output channels peak total output all channels driven max. Peak output voltage per channel max. Output current per channel max. Output pow...

  • Page 99: Warranty and Support

    Warranty and support 93 plm series operation manual rev 1.1.9 12. Warranty and support 12.1 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 three (3) years ...

  • Page 100: Warranty and Support

    94 warranty and support plm series operation manual rev 1.1.9 12.3.2 factory service in the event a lab.Gruppen product requires factory service, you may contact lab.Gruppen’s service depart- ment for return instructions and a return authorization number. Please note for product return: 1. Use the o...

  • Page 101

    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.