AUDAC LIM012 User manual

LIM012
User Manual
www.audac.eu

2

3
Index
Introduction 5
Environment 7
Chapter 1: Safety requirements 9
Caution servicing9
Chapter 2: Pin connections and connectors 10
Chapter 3: Overview LIM012 11
Front panel 11
Rear panel 12
Chapter 4: LIM012 Quick start guide 13

Chapter 5: Additional information 15
Technical specifications 15

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5
Introduction
Balanced Stereo Limiter
TheLIM012balancedstereolimiterisasmallsize,easytouse,devicethatcanbeused
forlimitingthesignalcomingfromaninputdevicesuchasamix-table,microphone,
etc…thatisthensendtoa(power)amplifier.Limitingthisinputsignalwillnotonlyprotect
yourPAsystem,butalsoenablesyoutocomplytorestrictionsbylaw.
Whentheinputsignalofthisinputdeviceexceedsthedesiredlevel,theLIM012will
attenuatetheoutputsignalsenttotheoutputdeviceinsuchawaythatitwillagainreach
thedesiredlevel.ThislevelcanbesetbyturningtheLimitswitchandcanbelimited
at6differentlevels:0dBV,-6dBV,-12dBV,-18dBV,-24dBVand-30dBV.Atthe
bottomthegreenLED’sindicatethelimitlevel.Whentheoutputsignalisexceedingthe
desiredLevel,attenuationwilltakeplaceandtheredLEDwillindicatethelocationof
theLimitation(LeftorRight).
TheLIM012balancedStereoLimiterhas2channelsthatworkseparatelywherebyit
canbeusedasastereo,or2xmonolimiter.TheLIM012needstobeconnectedtoa
24DCpowersource.ThePSD242Powersupplyisincluded.

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7
Environment
Donotplacetheunitinenvironmentswhichcontainhighlevelsofdust,heat,moisture
orvibration.
Donotusetheunitnearwaterorotherliquids.Makesurenowaterorotherliquidscan
bespilled,drippedorsplashedontheunit.
Theunitisdevelopedforindooruseonly.Donotuseitoutdoors.
Donotplaceobjects(books,vases,…)ontopoftheunit.
Placetheunitonastablebaseormountitinastablerack.

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9
Chapter 1
Safety requirements
Alwayshandletheunitwithcare.
Onlyuseagroundedsocketoutletandapowercordwithgroundingplugtopluginthe
unit.
Thisunitisnotatoy.Itshouldnotbeoperatedbychildren.
Donotopentheunit.(riskforelectricalshock)

CAUTION - SERVICING
  This unit contains no user serviceable parts. Refer all
  servicing to qualified service personnel. Do not perform
  anyservicingunlessyouarequalifiedtodoso.
NOTE
This product conforms to the following European Standards:
EN50081-1:1992,EN50082-1:1992,EN60065:1994


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Chapter 2
Pin connections and connectors
Connection standards:
Thein-andoutputconnectionsofAUDACaudioequipmentareperformed
correspondingtointernationalwiringstandardsforprofessionalaudioequipment.
XLR:
1=Ground/Shield
2=Signal+
3=Signal-
XLR Female:



XLR Male:

11
Chapter 3
Overview LIM012
Front panel

ThefrontpaneloftheLIM012containsallthecontrolsandindicators.
1)Powerswitch:
Bytogglingthisswitch,thepowerfortheLIM012canbeswitchedONandOFF.
ThepowerLEDwillilluminatewhenthepowerisswitchedON.
2)Limitingleveladjustmentswitch:
Bychangingthepositionofthisrotatableselectionswitch,thelimitinglevelcanbe
adjusted.Theswitchhas6differentpositionswherebythelimitinglevelcanbeset
between-30dBVand0dBV.Ascrewdrivershouldbeusedtochangetheposition.
3)LimitinglevelindicationLED’s:
BymeansofthesegreenLED’stheselectedlimitinglevelwillbeindicated.TheLED
locatednexttotheselectedlimitinglevelwillilluminatewhendeviceisoperating.
4)LimitingindicationLED’s:
TheseredLED’swillilluminatewhenthesignalofthecorrespondingchannelisbeïng
overdrivencomparedtotheselectedlimitlevel.Thelimitcircuitwillintervenebringing
theoutputsignaltotheselectedlevel.

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Rear panel

AttherearpaneloftheLIM012arealltheconnectionsprovided.
1)24Voltspowerconnector:
Theincluded24voltspowersupply(PSD242)shouldbeconnectedtothisconnector.
Payattentiontothepolaritywhenconnectingthepowersupply.
2)XLRInputconnectors:
Thesignalcomingfromtheinputdevicesuchasanaudiosource,mixingtable,pre-
amplifiershouldbeconnectedtothe3-pinFemaleXLRinputs.
3)XLROutputconnectors:
Theoutputsignalisavailableatthese3-pinMaleXLRconnectors.Theoutputsignal
istheaudiosignalwhichisdriventhroughthelimitingcircuit.Theleveloftheoutput
signalwillalwaysbelowerorequaltotheselectedlimitinglevel.

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Chapter 4
LIM012 Quick start guide
This chapter guides you through the setup process of a basic project with one LIM012
Balanced Stereo Limiter, an audio source device (mixing table) and a power amplifier.
Overview of the LIM012 setup
1) Connecting the LIM012
ConnectyouraudiosourcedevicetotheFemaleXLRinputconnectorsandconnect
yourpoweramplifierstotheMaleXLRoutputconnectorsontherearsideofthe
LIM012.Connecttheincludedpowersupply(PSD242)totheEuro-TerminalBlock
connector.Watchthepolaritywhenconnectingthepowersupply.
2) Turn the device ON
Turnthedeviceonbytoggelingthepowerswitchtothe“I”position.
3) Selecting the desired limiting level
Selectthedesiredlimitinglevelthroughrotatingthe“limitingleveladjustmentswitch”
bymeansofascrewdriver.ThecorrespondingLEDfortheselectedlimitinglevelwill
illuminate.

4) Ready
Yoursystemisnowworkingproperlyandreadyforuse.

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15
Chapter 5
Additional information
Technical specifications
Peripheral
Inputs     2xBalancedLineaudioinput

Outputs     2xBalancedLineaudiooutput
Connectors
Audioinput    3-PinFemaleXLR
Audiooutput    3-PinMaleXLR

Power     2-pinEuroTerminalBlock
Specifications
Levelrange    -30dBVto0dBV
THD+N     <0.15%
Signal/Noise    >90dB
Frequencyresponse   20Hz-20kHz
Other
Powersupply    24VDC
PSD242switchingpowersupplyincluded
     100~240VAC/47~63Hz
Weight     0.415Kg
Dimensions    110x44x160mm

Shippingweight&volume   1.20Kg-0.0078Cbm