MIPRO mr123da User Manual

Disposal

Disposetheunusabledeviceaccordingtovalidregulations.

Disposalofspentbatteries/accumulators

Youarerequiredbylawtoreturnallspentbatteries.

Disposingofusedbatterieswithdomesticwasteis
prohibited!

OPERATINGMANUAL

MR-123D

MR-123D

CPU-controlledantennadiversityreceiving

Batteries/NiCadcellscontainingtoxinsare
markedby
accompanyingsymbolsthatrefertothe
prohibitionof
disposalwithdomesticwaste.Thedesignations
forthe
decisiveheavymetalsare:=cadmium,

=mercury,

2005-08-13

Bydoingso,youfulfilthelegalrequirementsandcontribute
totheconservationofourenvironment!

Hg

=lead.Youmayreturnspent

Pb

batteries/accumulatorsfree
ofchargetotherecyclingcentres,ouroutletsor
anywhere
elsewherebatteries/accumulatorsaresold.

Cd

VHFdualchannel

WirelessMicrophoneSystem

ElectronicsCo.,Ltd.

Headoffice:814,Pei-KangRoad,Chiayi,60096,Taiwan.
Taipeioffice:5,Lane118,Sung-tehRoad,Taipei,Taiwan.

Web-http://www.mipro.com.tw
E-mail:@mipro.com.tw

mipro

11075,

2 CE22 9

DUALCHANNELWIRELESSRECEIVER DUALCHANNELWIRELESSRECEIVER

ThankyouforselectingMIPROdualchannelwirelessmicrophonesystem.
Beforeoperatingpleasereadthisinstructionmanualcarefullyandthoroughlyin
ordertoattainthecorrectoperatingproceduresandachievethebestresults.

Thissystemisadualchannelwirelessreceiverwithtwomicrophones.
MIPROdesignsasophisticatedCPUinsidethesystemthatcanautomatically
differentiatethereceivingsignalstrengthfromthe2antennasofthereceiver.
Whenanantennaisatits"ReceivingDeadPoint"andnoiseinterferencestarts,
theCPUwillautomaticallyadjustthesystemtothe antennathathasstronger
signalreceivingtoavoidsignaldropoutsandnoiseinterferenceatthemoment
whenthewantedsignalfallsbelownoisesignal.Thesystemhasa"NOISE"
indicatortodisplayifthesystemisunderinterferenceandanewly-added
balanceadjuster(2)toadjustthevolumeofbothmicrophones.

FEATURES:

CarrierFrequencyRange VHF

ReceivingMode

ApplicationsApplications

FrontPanel

CPU-controlleddiversity.DualPilotone&NoiseLocksquelchpreventrandomnoise
interferencesourceslikecomputers,karaokemachinesandDVDplayers.

Entry-levelprofessionalswithlimitedbudget.

Receiverfeaturestheseuniquepatenteddesigns:

1.Firstreceiverequippedwithabalancedvolumecontroltoenableuserstoadjustthe
mixedoutputvolumeoftwowirelessmicrophones.Thesystem'sdefaultoutputlevel

isaccuratelypre-adjustedtomatchthemicrophonecapsule'ssensitivityand
designedtodeliveranoptimalperformancewithoutoverloaddistortion.

2.Firstreceiverequippedwitha"receivingsensitivityadjustor"onthereceiverfront
paneltoallowuserstoadjusttoahighersensitivityinordertoincreasereceiving
distanceandtoeliminatesignaldropouts,ortoadjusttoalowersensitivitytoavoid
noiseinterference.

3.Firstreceiverequippedwitha"NOISE"LEDindicator.Userscanfirstidentify
whetherthereceiverisexperiencinginterferenceandcanthenmakeaccurate
adjustmentsinthereceiver'ssensitivitytoeliminatetheinterferenceandestablish

optimalperformance.

4.ThereforeandAFsignalindicatorstoidentifyifthesystemisreceivingsignals
properly.

“”

1.PARTSNAMEANDFUNCTIONS

A.FrontPanel

0

POWER

(3)(2) (5) (7) (9)(4) (6) (8) (10)(1) (11)

Fig.1

(1)PowerSwitch&Indicator:Whenswitchisturnedon,redindicator

illuminatestodenotenormalpowerstatus.

(2)MicrophoneBalanceVolumeAdjuster:Allowuserstoadjustthemixed

volumeleveloftwomicrophonestoabalancedordifferentlevel.
Adjusterisfactorypresetforbalancedlevel.

(3)(10)SensitivityAdjuster:Toadjustreceiversensitivitythatensuresnonoise

outputifreceiverisnotreceivingsignalsfromtransmitters.

(4)(9)NoiseIndicator:Todisplayifthesystemisunderinterference.
(5)(7)RFSignalIndicator:IndicatesreceivedRFsignalsfromtransmitters.

(6)(8)AudioSignalIndicator:Indicatesthemicrophonesignal.
(11)RackmountBracket:ToinstallthereceiverintoanEIA19-inch

standardrackcase.

Thissystemincludesthefollowingaccessories:

①×AudioOutputCable2
③×Antenna2

②×InstructionManual1
④×AC/DCAdapter1

1 2

DUALCHANNELWIRELESSRECEIVER DUALCHANNELWIRELESSRECEIVER

B.RearPanel

(16)(13)(14)(15) (17) (18)(12)

Fig.2

(12)AntennaBinputConnector:ToinstallAntennaB.
(13)UnbalancedAudioOutputJackB:1/4PhoneJackprovides

unbalancedaudiooutputsignalfromChannelB.

(14)

(15)UnbalancedMixedSwitchWhenswitchto"MIXED",systemwillhave

(16)DCInputJack:Toconnect12VDCfromtheAC/DCadapter.
(17)UnbalancedAudioOutputJackA:1/4PhoneJackprovides

(18)AntennaAInputConnector:ToinstallAntennaA.

UnbalancedLevelSwitch:"0dB"selectionisfor"Microphone-level"
output."+10dB"selectionisfor"AUXlevel"output.-6dBselection

isforhalfofcablemicrophonevolume.

﹕

mixedAFoutput.AFsignalfrombothChannelA&Bwillbeexported
from"OutputB"andnoAFoutputfrom"OutputA".Whenswitchto
"Separate",AFsignalwillbeexportedseparatelyfrom"OutputA"and

"OutputB".

unbalancedaudiooutputsignalfromChannelA.

λ

〝〞

λ

2.INSTALLATIONOFTHERECEIVER

1.Installtwoantennas,perpendicularlyandfullyextended,totheantenna

2.ConnecttheAC/DCadaptercabletoDC12VINPUTJACK(16),thenplug

3.AudioOutputConnection:

3 4

Fig.3

inputconnectors(12)&(18)attherearpanelofthereceiver,asshownin
Fig.3.

theadapterunitintoanappropriateACoutletwithcautiontothecorrect
voltageunderbothACoutletandadaptermarked,asshowninFig.3.

(a)

UnbalancedLevelSwitch(14)SettingPosition:Whenconnectingfrom
receiver'sunbalancedoutputtothe"AUX-IN"jackofamixeror
amplifieror"ElectricGuitar",switchtheLevelSwitch(14)to"+10dB"

position.Lowsensitivitymayoccurifswitchtothewronglevelposition.
Whenconnectingfromreceiver'sunbalancedoutputtothe"MIC-IN"
jackofamixeroramplifier;switchtheLevelSwitch(14)to"0dB"

position.Overloaddistortionmayoccurifswitchtothewronglevel
position.Whenusingelectricguitar,don'tuse"0dB"or"-6dB"position
asitmayhavegeneratedinsufficient level.Therearelotsofamplifiers

forKaraokemachineintoday'smarket,however,gainofamplifier's
"MICIN"isnotunified.Therefore,ifdistortionisencountered,please

switchtheLevelSwitch(14)to"-6dB"position.

(b)ConnectionforUnbalancedOutputs:Whenthereceiverisnearthe

input/outputjacksofmixers/amplifiers,orbothsystemsusephone
jacks,onecanconnecttwo(2)separateoutputcablestounbalanced
outputjacksB(13)andA(17)inthereceiver.Ifoutputmodeselector
(15)switchesto"MIXED"mode,connectonlyoneunbalancedcableto
unbalancedoutputjackB(13)asshowninFig.3.

(c)GuitarOutput:Usingaudiooutputcableattachedwith"PHONEPLUG"

type,plugoneendfromtheunbalance-mixedoutputjackofareceiver,
andtheotherendtotheinputjackofaguitaramplifier.Switchthe
LevelSwitch(14)toposition.

"+10dB"