Elvira LORNET-24 Manuel utilisateur

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1. Introduction

Theultra-compactnon-linear junction detector“LORNET-24”(further NLJD)isusedfor

searchand location ofelectronicdevices both in activeand switch-off state.

NLJDoperation isbasedon thepropertyofsemiconductorcomponentstogeneratea

responseatthe2nd and 3rd harmonicswhenradiatedbyanUHFprobingsignal.Semiconductor

componentsofartificialoriginwill haveahigherlevelsecondharmonicwhilesemiconductor

componentsofnaturalorigin(e.g.oxidefilms)will haveahigher levelthirdharmonic

respectively.NLJDanalyzesthe2nd and 3rd harmonicsresponseoftheradiatedobjects, which

enablesaquickandreliableidentificationofelectronicdevicesand naturaloxide

semiconductors.

NLJDautomaticallyfindsthebestreceivingfrequencychannelfreeofnoiseanddistortion

providingflawless operation eveninthecomplicatedelectromagneticenvironment.The

frequencytuningalgorithmimplementedinNLJDautomaticallyselectstheprobingsignal

frequencysuchthatthenoiselevelinthe2nd harmonicreceiving channelisheldminimal,while

digitalprocessingofademodulated signalgivesmaximumsensitivity.

There are two types ofradiated signals:

-continuous wavecarrier(CW);

-pulsemodulated carrier with adutycycle44 (pulse).

Thisenablestocombinewidedetection rangeand reliableidentification ofthedevices

found.

Theoutputpower automaticcontrolmodesignificantlysimplifiesoperator’swork. NLJD

simultaneouslydisplaysthe2nd and 3rd harmonicslevelsatitsLEDpanel.Besides, the2nd and

3rd harmonicslevelscanbeestimatedinturnaurallybytheclickrepetition ratereproduced

through abuilt-in loudspeaker orearphonesconnected to apocket-sizereceiver.

AdetectorofthereturnedUHFsignalenvelopeenablesattodetectradiodeviceswith

acousticconverter aurallyatcontinuous frequencycarrier radiation.

2. Specifications

2.1. Radiated signaltypes:

-continuous wavecarrier;

-pulsemodulated carrier with adutycycle44.

2.2. Carrier frequencystep 2 MHzwithin atuningrangeof(2406 … 2414)MHz.

Automaticfrequencyselection. Possibilityofradiation atthecarrier frequencywithaminimum

noiselevelin the2nd harmonicreceiver path.

2.3. Maximumradiated power in theCWmode 0.2 W.

2.4. Peak radiated power in thepulsemode10 W.

2.5. Manualorautomaticcontroloftheradiated power level.

Dynamiccontrolrangeof20 dBdownfromthemaximumoutputpower valuewith11 level

gradations.

2.6. Receivers sensitivitybetterthan –110 dBm(oneLEDlights up attheindicatorscale).

2.7. Receivers tuningfrequencies equalto thetransmitter doubleand triplefrequencies.

2.8. Receivingpathdynamicrange 24 dB(10dB–LEDindicatorrange,14 dB–attenuator

adjustingrangeatreceivers input).

2.9. Timeofcontinuous operation with alithium-Ion batteryatthemaximumradiated power:

-3 hours in thepulsemode;

-1.5 hours in theCWmode.

2.10. Equipped device weight≤0.7 kg.

2.12. Operatingconditions:

-ambienttemperature5…40°C.

-pressure 450 …800 mm ofmercury

3. Delivery Set,Designand Accessories

3.1. Thedevice includesunits and accessories stated in theTable1 below. Table1

No. Description Q-ty

1. Aduplexantennaunit with acontrolpaneland abuilt-in container fora

battery

2. ChangeableLi-Ion batteries

3. Acontainer forbatterycharging

4. Acharger foraduplexunit battery

5. Areceiver with anadapter to chargeits batteryand earphones

6. User Manual, Certificate

7. Apackagebagto keep and transportthedevice 1

Fig. 1

Theappearance ofthedevice is shown in Fig. 1, where:

1- LEDindicators;

2- aduplexantennaunit;

3- acontrolpanel;

4- apower switch;

5- atwisted cover ofthebatterysection;

6- acontainer forbatterycharging;

7- acharger foraduplexunit battery.

Fig. 2

Fig. 2 shows areceiver, an adapter forchargingits batteryand earphones.

Note: Atypeand appearance ofthechargingadapter and earphonescan bedifferentfromthe

shown ones.

4. PurposeofNLJDBasicUnits

4.1. Theduplexantennaunit with LEDindicatorsis used for:

•Analysisofdistortion andinterferenceintheinstrumentreceivingpath, whichismadeeach

timethetransmitter isswitchedon. Therefore,ifaninterferingsignalappearsduringoperation

(inacomplicatedelectromagneticenvironment)it isnecessarytoturnNLJDtransmitter off

and on fromtimetotimethus selectinganoptimalfrequencyautomatically,providingthebest

sensitivityand detection rangeofsemiconductorcomponents.

•Generation UHFsignal,receiptand digitalprocessing ofthe2

nd and the3

rd frequency

harmonics. Simultaneous displayofthe2nd and the3rd harmonicslevelsgivestheopportunity

todistinguish withahighreliabilitybetweensignalsofartificialsemiconductorsintegratedin

electronicdevices andnaturalcorrosiveones which appear atoxidation ofconnecting points of

various metals.

•Demodulation ofthe2nd and 3rd harmonicsresponse,theiramplification tothelevelrequired

fortappingbothtoearphonesand abuilt-inloudspeaker.Anoperatorcancontrolsound

volume.Anoperatorcanlistentodemodulatedsignalsofthe2nd harmonicfromlower or

upper receiverranges in turn.

•Indication ofthereceiverpower leveland levelsofthe2nd and 3rd harmonicsofthesignals

received (Fig. 3).

Fig. 3 LEDIndicators

Transmitter

power

2-nd harmoniclevel

3-rd harmoniclevel

4.2.Flexiblejointoftheduplexantennaunit withahandleisdesignedtotransformtheunit

intotransportation position (Fig.4).Besides, it helps theoperatortofixtheantennaina

position convenientforsearch.

Fig. 4 FlexibleJoint

4.3.Thecontrolpanelwithapower supplyisusedtocontroloperation ofNLJD.Itconsistsof

thehousing usedasanarmintowhichachangeablebatteryisput.Thecontrolboard, buttons

foroperation modescontroland displayLEDsareplacedinthehousing.Thecontrolbuttons

aredividedintotwogroups bytheirfunction:«AUDIO»placedintheupper halfofthepanel

and «POWERRF»in thelower half. Thecontrolpanelis shown in Fig.5.

Fig. 5 ControlPanel

Flexiblejoint

handle

Flexiblejoint

4 Transmitter ON button

2 Switch button to listen by

phones orloudspeaker

3 Button to switch be-

tween PULSEand CW

modes

7 Receiver attenuator

controlbutton

8,9 Transmitter power

controlbuttons

10,11 Volumecontrol

buttons

5 Power slide-typeswitch

6 Receiver attenuatorindica-

tor

1 Switch button to listen

to responseby2nd or3rd

harmonic

4.4. Functionsofcontrolpanelindicators:Continuous lightingofanyindicatorcorresponds

to«ON»position, absence oflighting–to«OFF»position. Simultaneous flickeringofall

controlpanelindicators shows abuilt-in batteryis dischargedand needs tobecharged.

4.5. Batterycharging oftheduplexantennaunit istobemadewithabatterycharger included

tothedeliverysetonly(Fig.1).Usingother chargersisnotallowed.Forchargingit is

necessarytotwistacover attheedgeofthearmoff,removeabatteryand place it intothe

container forcharging(Fig.1). Connectthecontainer to thecharger.

Whileacharger isconnectingtothepowermainsaredLEDislightning atitshousing.When

abatteryiscompletelycharged, theredLEDgoesout,and agreenLEDlightsup. Charging

timeofafullydischarged batterydoes notexceed6 hours.

4.6. Controlelements ofthereceiver are shown in Fig. 6.

Fig. 6Receiver

4.7. Receiver Operation Procedure

•Chargeabuilt-inbatterycompletelyusingtheadapter includedtothedeliveryset,here

CHARGE indicatorgoesout.

•Connectearphones to thecorrespondingsocket.

•Turn thereceiveron byaslide-typeswitch, herePOWERLEDlights up.

•Setacomfortablevolumelevelusingvolumecontrol.

•Ifthereceiver isturnedon whenNLJDisoff,thenthere isanoisesignalonlyinthe

earphonesathigher volume.Afterturningonacousticindicatorsignalscorrespondingtothe

operatingmodeofNLJDappear in theearphones.

5. Safety Measures

Socketfor

phones connec-

tion

Powerindica-

tor(lights up

whenON)

Socketforadapterconnec-

tion

Charging indicator

(

lights

duringcharging)

Volumecontrol

Powerslide-typeswitch

5.1. NLJDistobeoperatedonlybypersonswho havebeendulyinstructedforsafety

measures whileworkingwith electricand measuringdevices with open RFenergyradiators.

6. OperationOrder

6.1.RemoveNLJDfromthepackage.Ifnecessarychargethebattery.After transportation at

negativetemperaturesit isnecessarytokeepNLJDintheswitch-off stateatroomtemperature

atleastfor30 minutes.

6.2.TurnNLJDon bythetype-slideswitchplacedon thearm.The2nd and 3rd indicatorson

thecontrolpanelwill lightup, indicatingthatNLJDhasbeenpoweredon.OneyellowLED

shouldbelightningon theantennaunit (a circlescaleoftheprobingsignalpower indicator).

Itsinitialposition corresponds tothemaximumpower oftheprobingsignalintheautomatic

mode.Heretheprobing signaltransmitter isoff(it isturnedon afterpressingPWRbutton

only).The2nd and 3rd harmonicsindicatorsshouldnotlight(flashingofthefirstLEDsofthe

2nd and 3rd scalesispermitted).Maximumpower levelcanbechangedusingthepower control

buttons ofthetransmitter (Fig.5).

6.3.Turntheprobingsignaltransmitter on pressingPWRbutton. Thiswill switchon the

transmitter pulsemodeand theautomaticmodeofsignalpowercontrol.Theradiatedsignal

power will changedependingon asignallevelatthe2nd harmonicreceiver output.In thegiven

modeacousticinformation (clicks)ofthe2nd harmonicresponseisappliedtotheloudspeaker

orearphones.

Whenswitchingon3-RDmodebypressingLSTon thecontrolunit,theoutputpowerofthe

transmitter isadjustedautomaticallydependingon asignallevelatthe3rd harmonicreceiver

output.Acousticinformation ofthe3rd harmonicresponseisappliedtotheloudspeaker or

earphones.

To switchover tothemanualmodeoftheprobing signalpower control(MNLindicatorlights

up)press oneofthepower control buttons whentheprobingsignaltransmitter hasbeenturned

on.

Turntheprobingsignaltransmitter offandthenturnit on usingPWRbutton forareverse

switch over.

Ifit isnecessaryto tapthe3rd harmonicresponseturnon 3–RDmodeusingLST button on the

controlpanel.

Duringoperation inpremiseswithalotofelectronicdevicesit isnormallyrecommendedto

work atdecreased power oftheprobingsignal.

Theoptimumleveloftheprobingsignalis reached experimentally.

Press RFbutton toswitchover totheCWmode(CWLEDlights)fromthepulsemode

(PULSELEDlights)andvice versa.

6.4. Simultaneous flashingofall indicatorson thecontrolpanelindicatesthatthebatteryis

discharged. In this caseturn off thepower, untwistacoverattheedgeofthearmoff,removea

battery, placeit into thecontainer and chargeusingthecharger.

6.5. Ifaresponsesignalistobetappedbyearphones, press thecorrespondingbutton on the

controlpaneland turn thereceiver on.

Attention:

1)WhileoperatingNLJD constantlymonitorbatterystatechargingit in-time(bythe

indicators signal). NLJDmustbekeptwith abatterycharged.

2)Chargingshouldbedonewithachargerincludedintothedeliverysetonly,usingof

unauthorized chargers arestronglyprohibited.

7. SearchRecommendation

7.1. Ifpossibleremoveelectronicdevicesfromtheroomexamined. Ifit isimpossible,

examination should bedoneatadecreased radiated power.

7.2. Setmaximumradiated power leveland oneoftheoperation modes ofthereceiver.

7.3. Analysisofthereceived2nd and 3rd harmonicslevelsismadebothbynumber ofLEDs

lightningon thecorrespondingindicatorscaleandbyclicks repetition rateintheloudspeaker

orearphones.

7.4. Formore accuratelocation oftheobjectunder searchingdecreasethetransmitter output

power orreceivers sensitivityusingATT button.

7.5. Whenanartificial р-ntransition isfound oneshall normallyseestablelightningofthe2nd

harmonicindicatorLEDs.Whilerapping atthesuspectedplace ofap-ntransition, readingsof

LEDs do notchange.

7.6. Whenanatural р-ntransition isfound, oneshall observestablelightningofthe3

harmonicindicatorLEDs. Whilerappingattheexaminedsurface intensively,readingsof

indicators bythe3rd harmonicwill change, as arule.

Thesearchtechniqueoffereddoesnotreflectall nuanceswhichmayappear ineachexact

case, and represents arecommendation only.

1. General

1.1. Before operation studyUser Manualfor«LORNET-24»thoroughly.

1.2. TheCertificateisincludedinthedeliverysetand shouldbealwayskeptwiththe

instrument.

1.3. Ifthedevice issentforrepairortoadifferentplace duringoperation theCertificateistobe

shipped with theinstrument.

1.4. Marks in theCertificateshould bedonein-time.

1.5. All recordsintheCertificateshouldbemadebyink only,distinctlyandcarefully.All

unauthorized erasures, blots and corrections are notpermissible.

1.6. Itis forbidden to makeanynotes orrecords in thefields and on thecover oftheCertificate.

2. Delivery Set

Table1

No. Description Q-ty

1. Aduplexantennaunit with acontrolpaneland abuilt-in container fora

battery

2. ChangeableLi-Ion batteries

3. Acontainer forbatterycharging

4. Acharger foraduplexunit battery

5. Areceiver with anadapter to chargeits batteryand earphones

6. User Manual, Certificate

7. Apackagebagto keep and transportthedevice 1

3. Warranty

3.1. Warrantyperiod for«LORNET-24»is 18 months upon supplyto thecustomer.

3.2. Lifetimeis 6 years.

3.3. Ifthedevicefailsduringwarrantyperiod providedthecustomer hasfollowedall the

operation, transportation and storagerules, themanufacturer istomaketherepairfreeofcharge

orreplace thedevice.

3.4. Warrantydoes notcoverpower elements.

4. AcceptanceCertificate

5. PackageCertificate

ACCEPTANCECERTIFICATE

Ultra-CompactHandheld Non-Linear

Junction Detector«LORNET-24»No _____________

nameserialnumber

ismanufactured and accepted accordingtoobligatoryrequirementsofstate

standards, currenttechnicaldocumentation and isfitforservice.

Technicalinspection

__________

stamp date, month, year

PACKAGECERTIFICATE

Ultra-CompactHandheld Non-linear

Junction Detector«LORNET-24 No _____________

nameserialnumber

Packaged by: «ELVIRA»Production JSC

accordingtotherequirementsstated inthe given technicaldocumentation.

date, month,year

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