Audiotel International SUPERBROOM PLUS TA User manual

AUDIOTELINTERNATIONAL
Ltd–Issue3.1(09/2004)
AUDIOTEL
INTERNATIONAL
Corby RoadWeldon
CORBY Northants
NN17 3AR UK
SUPERBROOMPLUSTA
Non-LinearJunctionDetector
Non-LinearJunctionDetector
Non-LinearJunctionDetector
Non-LinearJunctionDetector
Non-LinearJunctionDetector
PartNos:2-197-869
PartNos:2-197-869
PartNos:2-197-869
PartNos:2-197-869
OperatingManual
OperatingManual
28
SuperBroomPlusTA–OperatingManual
SuperBroomPlusTAOperatingManual-PartNo:2-197-871
©2004AudiotelInternationalLtd

AUDIOTELINTERNATIONAL
Ltd–Issue3.1(09/2004)
ii
SuperBroomPlusTA–OperatingManual
©2004AudiotelInternationalLtd
Underthecopyrightlaws,thismanualmaynotbecopied,inwhole
orpart,withoutthewrittenconsentofAudiotelInternationalLtd.
Everyefforthasbeenmadetoensuretheaccuracyofthismanual.
Theinstructionsanddescriptionsareaccurateatthetimeof
publication.However,succeedingversionsoftheequipmentand
manualsaresubjecttochangewithoutnotice.Audiotelassumes
noliabilityfordamagesincurreddirectlyorindirectlyfromerrors,
omissionsordiscrepanciesbetweentheequipmentdescribedand
themanual.
Ifyouhaveanycommentsorsuggestionsonimprovingthismanual
pleasecontactAudiotelatthefollowingaddress:
AudiotelInternational
CorbyRoad
Weldon
CORBY
Northants
NN173AR
orEmailusat:[email protected]
APPENDIXDTECHNICALSPECIFICATION
TRANSMITTERSECTION
Frequency

869.4MHz-869.65MHz
Channel

12.5KHz
Spacing
HopRate

1Minperchannel
Power

EULow-upto+13dBm
EUHigh-upto+27dBm
NonEU-upto+33dBm
OutputFilter

Highordercomblinebandpasslter,2ndand3rdharmonicrejection
>125dB
RECEIVESECTION
Filtering

Highordercoaxialbandpasslter.
Frequency

1738.825-1739.275MHzand2608.2375-2608.9125MHz
IF

21.4MHzand455KHzdualconversion,FMandAMdemodulation.
Sensitivity

-130dBmforvisibleRSSILCDbargraphindication
-130dBmforaudibleGeigerclickindication.
SWEEPANTENNAHEAD
Antenna

Linearpolarisedtransmitantenna.Microstripcircularlypolarisedreceive
antennas.(Circularlypolarisedreceiveantennasrespondtocross-polarised
signals)
HeadDisplay
16-segmentLEDbargraphforsignalstrength(4-bitresolution).
LEDdisplayforpoweroutputandotherstatusinformation.
OUTPUT
Audio

Throughinternalswitchedloudspeakerorheadphonesfor:

SignalstrengthgivenbyGeigertypeclickorReceiverdemodulatedoutput.
Output

Maximum1.8Vp/pinto8ohms.
Displays

SignalstrengthLCDbargraph(7-bitresolution)
SelectedfunctionLEDs
POWERREQUIREMENTS
Battery

InternalLi-Ionrechargeablebatteryprovidesbetween3and20hoursof
operationdependentontransmitpower.
Appendices
Appendices
27

AUDIOTELINTERNATIONAL
Ltd–Issue3.1(09/2004)
iii
Contents
CEMARKEMCCOMPLIANCE,RADIOTYPEAPPROVALANDLOWVOLTAGEDIRECTIVE
......
1
SETTINGUP
...............................................................
..................
2
WHATYOUSHOULDHAVE
...............................................................
...................
2
IMPORTANTSAFETYINFORMATION
...............................................................
...........
2
ENVIRONMENTALCONDITIONS
...............................................................
................
4
POWERREQUIREMENTS
...............................................................
.........................
4
CONTROLS&INDICATORS
.........................................................
8
FRONTPANELCONTROLS
...............................................................
......................
8
THEANTENNAHEADDISPLAY
...............................................................
..............
13
FRONTPANELLCDDISPLAY
...............................................................
...............
14
OPERATION
...............................................................
................
16
BASICDESCRIPTION
...............................................................
...........................
16
FREQUENCYHOPPINGMODE
...............................................................
...............
16
POWERMODE
...............................................................
..................................
16
MANUALMODE
...............................................................
...............................
17
INITIALSEARCHTECHNIQUE
...............................................................
..................
17
PRACTICALCONSIDERATIONS-INNOCENTELECTRONICITEMS
......................................
19
PRACTICALCONSIDERATIONS-METALJUNCTIONS
....................................................
20
THEORYOFOPERATION-HARMONICRADAR
.......................
21
PRINCIPLEOFOPERATION
...............................................................
....................
21
THENON-LINEARJUNCTION
...............................................................
................
21
SUPERBROOMHARMONICRADAR
...............................................................
.........
22
APPENDIXA-OPTIONALACCESSORIES
..................................
24
APPENDIXB–TRANSMITTERPOWERVINDICATEDLEVEL.
...
25
APPENDIXC–TX,RX1&RX2FREQUENCYPLAN
....................
26
APPENDIXDTECHNICALSPECIFICATION
................................
27
26
SuperBroomPlusTA–OperatingManual
APPENDIXC–TX,RX1&RX2FREQUENCYPLAN
ChannelNo

TXFreqinMHz

RX1FreqinMHz

RX2FreqinMHz
1

869.4125

1738.8250

2608.2375
2

869.4250

1738.8500

2608.2750
3

869.4375

1738.8750

2608.3215
4

869.4500

1738.9000

2608.3500
5

869.4625

1738.9250

2608.3875
6

869.4750

1738.9500

2608.4250
7

869.4875

1738.9750

2608.4625
8

869.5000

1739.0000

2608.5000
9

869.5125

1739.0250

2608.5375
10

869.5250

1739.0500

2608.5750
11

869.5375

1739.0750

2608.6125
12

869.5500

1739.1000

2608.6500
13

869.5625

1739.1250

2608.6875
14

869.5750

1739.1500

2608.7250
15

869.5875

1739.1750

2608.7625
16

869.6000

1739.2000

2608.8000
17

869.6125

1739.2250

2608.8375

AUDIOTELINTERNATIONAL
Ltd–Issue3.1(09/2004)
iv
SuperBroomPlusTA–OperatingManual
APPENDIXB–TRANSMITTERPOWERVINDICATED
LEVEL.
H=4W
h=2W
9=1W
8=500mW
 
EUHigh
7=250mW
6=125mW
5=100mW
4=50mW
3=20mW
 
EULow
2=10mW
1=1mW
L=6uW
Appendices
Appendices
25
ECDeclarationofConformity
toR&TTEDirective1999/5/EC
Manufacturer:

AudiotelInternationalLtd.
CorbyRoad,Weldon,CORBY,Northamptonshire,NNI73AR
Representative:

N/A.TCFresideswithmanufacturerasabove
(residingintheECholdingtheTCF)
DESCRIPTIONOFEQUIPMENT:
Product:

SuperBroomPlusTA
ModelNumber(s):

2-197-869
Variantsinclude:

Rating:

7.2V@2.5AinternalLithiumIonbattery.ExternalAC/DCBattery
chargingadaptorinput,100-24OVac
±
10%
,
47-63Hz,0.5A@
23OVac(1Amax@I00V)whenusinguniversalinputpowersupply
supplied.
Productcovered:

Productionserialnumbersfrom:012896-01(Nov2001)
DECLARATION
Wedeclare,underoursoleresponsibility,thattheproductsidentiedinthisdeclaration,
andtowhichthisdeclarationrelates,conformtoalltheapplicablerequirementsofEU
Directive1999/5/ECandisCE-markedaccordingly:
Article3.1a:

BSEN60950:2000usedtoshowcompliancewiththe
LowVoltage
Directive73/23/EECasamendedby93/68/EEC.
Article3.lb:

EN300220-1V1.2.1(1997-11),ETS300683(June1997)usedto
showcompliancewith
theEMCDirective89/336/EECasamended
by92/31/EEC.

ConformitywasassessedusingaTechnicalConstructionFile

No:MN400533
Issue:I
THEAUTHORISEDSIGNATORYTOTHISDECLARATION,ONBEHALFOFTHEMANUFACTURER,ISIDENTIFIED
BELOW:
Name:

I.Roberts
Position/Title:

TechnicalDirector
Signature:

MN400533 iss. I

AUDIOTELINTERNATIONAL
Ltd–Issue3.1(09/2004)
1
CEMARKEMCCOMPLIANCE,RADIOTYPEAPPROVALANDLOW
VOLTAGEDIRECTIVE
TheCEmarkisafxedtotheSuperBroomUnit,toconrm
compliancewiththefollowingEuropeanCommunity
Directives:
CouncilDirective1995/5/EContheapproximationofLaws
ofMemberStatesrelatingtoRadioandTelecommunications
TerminalEquipment
andthefollowingLVD,EMCandRadioTypeApproval
standards:
EN60950:2000
EN300220-1(1997-11)
ETS300683(June1997)
UKAirinterface2030V1.1
24
SuperBroomPlusTA–OperatingManual
APPENDIXA-OPTIONALACCESSORIES
STANDALONELITHIUMIONBATTERYCHARGER
■

ChargesSuperBroomLi-ionbatterypacksonly.
■

16hrchargetimeforcompleterecharge.
■

UsesexternalAC/DCAdaptorassupplierwith
SuperBroom.
■

LEDindicatorsshowingbatterychargestatus.
■

FitsinSuperBroomcarrycase.
■

Recommendedwithadditionalbatterypacktoallow
extendeduseofSuperBroomunit.

AUDIOTELINTERNATIONAL
Ltd–Issue3.1(09/2004)
2
SuperBroomPlusTA–OperatingManual
SETTINGUP
ThisSectionCoversthecontentslistforyourSuperBroom,
importantsafetyinformationandchargingtheunitreadyfor
operation.
WHATYOUSHOULDHAVE
SuperBroomissuppliedasaready-to-usekit.Youshould
havethefollowingitems:
■

SuperBroomMainUnitAssembly
■

UniversalAC/DCAdaptor
■

ACPowerLead
■

Headphones
■

CarryingCase
■

OperatingManual
■

TestTarget(anelectronicComponentembeddedina
clearplasticpuck)
Ifanyitemismissingordamagedcontactusoryourlocal
agentimmediatelyforadvice.
IMPORTANTSAFETYINFORMATION
SUPERBROOMUSESALITHIUM-IONBATTERYPACK

CAUTION

Danger,riskofexplosionifbatterypacksaretamperedwith,
misusedorabused.Replaceanduseonlythosebattery
packssuppliedbyAudiotelInternationalLtd.
Donotopen,puncture,drop,crushortamperwithbattery
packs
Donotshortcircuitthebatterypacks
Donotincinerateorsubjectbatterypackstoexcessiveheat
TheoryOfOperation-HarmonicRadar
TheoryOfOperation-HarmonicRadar
Theharmonicsignalsproducedaredetectedbythetwo
receiversinSuperBroomandtheirrespectivesignalstrengths
displayed.
BecauseSuperBroomhasreceiversforbothsecondand
thirdharmonics,andbecauseelectronicandmetalnon-
linearjunctionsgivedifferingreturns,SuperBroomisable
toprovidetheuserwithdiscriminationbetweenelectronic
devicesandnon-electronic,metallicartefacts.
AlthoughthemainapplicationofSuperBroomisthe
detectionofelectronicdevices,thisprincipleisemployed
insomeequipmenttodetectconcealedman-mademetallic
artefacts.
Thismethodofdetectionistermed‘HarmonicRadar’.
InconventionalRadararadiosignalisemittedwhich
isreectedoffatargettoproduceanechoatthesame
frequency.SuperBroom’smethodofoperationistodetect
echoesatharmonicsofthesignalemitted.
SomeusersrefertoaHarmonicRadarasa‘Non-linear
JunctionDetector’.
23

AUDIOTELINTERNATIONAL
Ltd–Issue3.1(09/2004)
SettingUp
SpentbatterypacksshouldbereturnedtoAudiotel
InternationalLtd.DonotusetheACPowerLeadorAC/DC
Adaptorif:
■

TheACPowerLeadcableoritsplugsbecomefrayed
orotherwisedamaged
■

TheAC/DCAdaptorcasingiscrackedorotherwise
damaged
■

TheACPowerLeadorAC/DCAdaptorareexposedto
rain,liquidsorexcessivemoisture
TheACAdaptorshouldonlybeusedincontrolledofce
environmentswithamaximumambienttemperatureof35º
CentigradeandRelativeHumidityof85%.
DonotusetheSuperBroomif:
■

TheSuperBroomunitisexposedtorainorother
excessmoisture
■

Theunithasbeendamaged
■

Yoususpecttheunitrequiresservicing
Youshouldtakethefollowingprecautions.
■

Donotpointtheantennaataperson’seyesorhead
■

Donotleavetheantennaincloseproximitytoany
partofthebodyforprolongedperiods.
■

Donotusenearinammableuidsorexplosivesor
inanyareawheretheuseofradiocommunications
equipmentisprohibited
■

Donotuseincloseproximitytoanypersonttedwith
aheartpacemakeroranyotherlifesupportsystem
■

SwitchoffSuperBroomwhennotinuse,this
minimisesexposuretoRFenergyandprolongsbattery
life.
SuperBroommayinterferewithoperationofsomeelectrical
equipment.
22
SuperBroomPlusTA–OperatingManual
Non-linearjunctionscanalsobeformedwhentwometal
objectsareincontactduetocomplexchemicalbehaviourat
thejunctionoftheobjects.
SUPERBROOMHARMONICRADAR
ThesignalgeneratedbySuperBroomisaspectrallypure
radiosignalwithinthefrequencybandof869.4–869.65
MHz(Thereare19frequencychannelsofwhichonlythe
10optimumchannels,selectedduringSuperBrooms‘sstart
upself-checkprocedure,areusedatanytime).Anynon-
linearjunctionwithinrangere-radiatestheradioenergyat
harmonicfrequenciesoftheincidentsignal.Inthiscasethe
frequenciesproducedare:
1738.825–1739.275MHz-usuallytermedthe‘second
harmonic’
2608.2375–2608.9125MHz-usuallytermedthe‘third
harmonic’
andsoon.Acompletefrequencyplanisgiveninappendix
C.
Thenatureofthenon-linearjunctionswithin
electronic
components
issuchthatthestrongestharmonicproduced
isusuallythe
secondharmonic
,withthethirdharmonic
usuallyappreciablyweaker.Otherharmonicsareusually
veryweak.
Incontrasttothisthenatureofthenon-linearjunctions
between
metalobjects
aresuchthatthestrongestharmonic
producedisusuallythe
thirdharmonic
,withthesecond
harmonicusuallyappreciablyweaker(butmayberoughly
equalinsomesituations).Otherharmonicsareusuallyvery
weak.
3

AUDIOTELINTERNATIONAL
Ltd–Issue3.1(09/2004)
4
SuperBroomPlusTA–OperatingManual
ENVIRONMENTALCONDITIONS
TheSuperBroomhasbeendesignedtooperatewithinthe
followingconditions:
Temperatureconditionsof+5°Cto+35°C(TheLCDmay
slowdownat+5°C.)
POWERREQUIREMENTS
SuperBroomonlyoperatespoweredbyitsinternalbattery
pack.TheexternalAC/DCAdaptorisusedtorecharge
thebatteryonlyandcannotbeusedtodirectlypower
SuperBroom.
BATTERY
TheinternalrechargeableLithiumIonbatterypackgives
3-20hourscontinuoususe(dependentonthepoweroutput
setting).Thebatterywillneedtoberechargedwhenthefront
panelLCDdisplayshowsapproximately6.5V.Thebattery
isautomaticallyrechargedwhenexternalpowerisapplied
totheSuperBroomviatheexternalAC/DCAdaptor.Internal
protectioncircuitryprotectsthebattery.Ifforanyreason
thebatterysuffersanytransientfaultsuchasshort-circuit,
overchargingordeepdischarge,thepackwillshutdown.It
willremaininthisstateuntilrechargedbyconnectionofthe
externalAC/DCAdaptor.
IftheSuperBroomisleftswitchedon,asthebatterypower
levelfalls,thefollowingsequenceofeventswilleventually
occur:
1

SuperBroomentersaresetstate,thisisindicatedby
all6LEDsontheleft-handsideofthefrontpanel
illuminating.
2

Thebatterypackprotectioncircuitrywillshutdown
thebatterypack.Allsignsoflifewillbeabsent.
TheoryOfOperation-HarmonicRadar
THEORYOFOPERATION-HARMONICRADAR
ThissectionisintendedtoexplainhowSuperBroom
detectselectronicdevicesandwhyithastworeceivers.
Understandingthistheoryisnotessentialtooperationof
SuperBroombutshouldhelpusersperformafastersweep
andbemoreappreciativeofoperation.
PRINCIPLEOFOPERATION
SuperBroomdetectselectronicComponentsthatare:

Diodes
or

Transistors
or

IntegratedCircuits
Thesecomponentsareusedtomakeelectronicdevices
(togetherwithothercomponentssuchasresistorsand
capacitors,forexample).SuperBroomcandetectelectronic
devicesregardlessofwhetherthedeviceispoweredor
operationalalthoughthismayaffecthowwellitcanbe
detectedfromagivendistance.
SuperBroomdoesnotreacttoresistors,capacitors,
transformers,batteriesandothercomponentsthatdonot
containdiode-ortransistor-likematerials.
SuperBroomdoesnotdetectmetalobjectsexceptwhen
metallicsemi-conductingjunctionsareformed-thisis
explainedbelow.
THENON-LINEARJUNCTION
Distortionofasignalresultsingenerationofharmonicsof
theincidentsignal.Higherfrequenciesareproducedwhich
areawholenumbermultiples(integermultiples)-termed
‘harmonics’-oftheincidentsignal.
21

AUDIOTELINTERNATIONAL
Ltd–Issue3.1(09/2004)
SettingUp
SettingUp
Atanytimeduringoraftertheabovesequenceattaching
theunittoanexternalpowersupplyviatheexternalAC/DC
AdaptorwillstarttorechargetheSuperBroombatterypack.

WARNING

Dangerofexplosionifbatteryisincorrectlyreplaced.
Replaceonlywiththesameorequivalenttyperecommended
bythemanufacturer.Disposeofbatteriesaccordingtothe
manufacturer’sinstructions.
CHARGINGTHEBATTERY
SuperBroomisdesignedtoautomaticallyenteradormant
statewhenpowerisappliedviatheexternalAC/DCadaptor,
(positivecentre),SuperBroominputisprotectedagainst,
reverse-polarityandover-current.
TheAC/DCAdaptorsuppliedwillworkwithACvoltages
from100to240VAC.
TheChargersocketislocatedontheright-handpanelof
yourSuperBroom.ItisrecommendedthattheSuperBroomis
lefttochargefor6hourstoensureafullcharge.
WhenconnectedtotheAC/DCAdpatortheBatteryCharge
StatusLEDonthefrontdisplaypanelisilluminatedRed.
WhenthebatteryisfullychargedthefrontpanelLED
changestoGreen.

Note

WhenyourSuperBroomisrstunpackedtheinternalbattery
packmaynotbefullycharged.

Caution

OnlyusemanufacturersrecommendedexternalAC/DC
adaptor.
20
SuperBroomPlusTA–OperatingManual
PRACTICALCONSIDERATIONS-METALJUNCTIONS
Althoughmetaljunctionsusuallyresultinstrongerthird
harmonicandweakersecondharmonicreturnsignals
aparticularmetallicjunctionmaygivean‘electronic
Component’likereturn.
Metallicjunctionsareoftenverysensitivetovibrationand
thisvibrationcanbeheardifLISTENisselected(alsoselect
‘2nd’)andtheareatappedwitharubberfacedhammeror
otherobjectthatwillnotcausematerialdamage.
Aboxofpaperclipsisagoodexampleofametallictarget
andexperimentationwilldemonstratethevalueofLISTEN.
5

AUDIOTELINTERNATIONAL
Ltd–Issue3.1(09/2004)
6
SuperBroomPlusTA–OperatingManual
ReplacingBatteries

Note

EnsureAC/DCadaptorisisolatedfromtheACmainsand
removedbeforereplacingbatterypack
Thebatterycompartmentisaccessedviaaremovabledoor
onthebaseoftheSuperBroomunit(seeopposite).The
doorissecuredbya1/4turnscrew.TheBatterypacksare
speciallyconguredforusewiththeSuperBroomandshould
onlybereplacedwithAudiotelsuppliedbatterypacks.
Thebatterypackshavebuilt-inprotectioncircuitryandare
designedtopreventreversepolarityconnection.
DisposalofBatteries
Attheendofabatterypack’susefullifeitshouldbereturned
toAudiotelforcorrectdisposal.Incorrectdisposalmaycause
seriousinjury.
Operation
PRACTICALCONSIDERATIONS-INNOCENTELECTRONICITEMS
Mostelectronicitemswillbevisibleandthereforeobvious
sourcesofafalsealarms.Thetransmitterpoweroutputand
receiversensitivityofSuperBroomarebothhighenoughto
detectlarge(inthiscontext‘large’referstotheir‘detection
size’ratherthanphysicalsize)objectsfrommanymetres
away.Ifitisnotpracticaltomoveelectronicitemsthenthe
powersettingmustbereducedtolimitthedetectionrange.
Thiscan,ofcourse,makedetectionof‘small’targetsmore
difcult.
Someelectronicitemsmaynotbeobvious.Examples
include:
Electronicitemsontheothersideofawall,door,ceilingor
oor
■

SmokeDetectors
■

SecurityDevices
■

DoorlockingorAccessControlsystems
■

LightingDimmers
Bodywornitemssuchas
■

pagers
■

radiotelephones
■

deaf-aids
■

electronickeys
Whenadevicehasbeendetectedalwayscheckthatno
innocentobjectisconcealednearby.
19

AUDIOTELINTERNATIONAL
Ltd–Issue3.1(09/2004)
SettingUp
SettingUp
18
SuperBroomPlusTA–OperatingManual
Itisrecommendedthatusersinitiallyadoptthefollowing
searchstrategy.Asexperienceisgained,userscandevelop
theirowntechniquesandmethods.
1

Setthemaximumlegaltransmitterpowerforcountryof
operationatthesetpowermenuduringstartup(UK=EU
High).



Note

FornonEUcountriesTXpowerissetusingtherotarypower
outputcontrol(9).



2

BeginwiththeSuperBroomsetto
CLICK
,
COMPARE
and
Powermode(thesearethedefaultsettings).SelectDSP
modebypressingListen.



3

Setthe
Volume
controltominimum,setthe
Squelch
control
fullyanticlockwiseandconnectthe
headphones
.Adjustthe
volumecontroltosuit(usingtheTestTargettogeneratea
signalifnecessary).Theheadphonesarenotneededatthis
stagesocanbewornaroundtheneck



4

Passthe
AntennaHead
overallsurfacesinthesearcharea
sothat,ideally,thedistancebetweentheantennaheadand
apotentialconcealmentisminimised(forefcientoperation
theminimumdistanceshouldnotbelessthan6inches).
Repeat
coverageofanareaafterrotatingtheantennahead
through90degrees



5

Ifatargetisdetectedthedifferenceinsecondandthird
harmonicsignalstrengthswillbedisplayedontheAntenna
Head.MovetheantennauntiltheCOMPAREsignal
strengthreachesamaximum.



6

Searchtheidentiedlocationforthedevice.
Battery Compartment Door
RetainingScrew
7

AUDIOTELINTERNATIONAL
Ltd–Issue3.1(09/2004)
8
SuperBroomPlusTA–OperatingManual
1 Click
2 Listen / Mode
3 Detect /
�
(Back-light)
6
3rd
5
2nd
4
Compare
Audio Output
Signal Source
}
}
7
LCD Display
8
Squelch Control
11
Headphone Socket
13
On Button
9
Power Output Control
10
Volume Control
14
Off Button
12
Battery Charge Status
CONTROLS&INDICATORS
FRONTPANELCONTROLS
1
CLICK
SelectsClickaudiooutput,(defaultaudiooutput)theaudio
outputisa‘Geiger’typeclickwhichincreasesinfrequency
asthesignalstrengthincreases.Thisisusedmainlywhen
pinpointingthelocationofatargetastheclickratewill
usuallybeatitsmaximumclosesttothetarget

Note1

Duringstartupinthe‘SetTxpower‘menuthisbutton
(click)setsthemaximumTXpowerto20mW(EUlowpower
setting).
Operation
MANUALMODE
Thisisthedefaultmodeforpowercontrol.Theuser
manuallysetsthetransmitteroutputpowerlevelusingthe
rotaryPowerControl(9)fromLuptothemaximumpower
setduringstartup.
DSPMODE
InDSPmodeduetothecontinuallycontrolledpoweroutput
levelthebatterylifeisoptimised,thiscanextendbatterylife
considerablycomparedwithmanualmode.
Inthismodeasoftwarealgorithmisusedtocontrolthe
transmitteroutputpower.Astheantennaapproachesatarget
non-linearjunctionthetransmitterpowerisreduced.This
avoidsoverloadingthetargetjunctionwithradioenergy
whichcangiverisetofalseindications.Whentheantenna
ismovedawayfromthetargetjunctionthepoweroutputis
increasedbythecontrollingalgorithm.
InDSPmodethechangesinpowerlevelaretransparentto
theuserasthereceivedsignalindicationlevels(Geigerclick,
bargraph,frontpaneldisplay)willcontinuetoriseandfall
astheantennagetsclosertoormovesawayfromthetarget.
WheninDSPmodetherotarypoweroutputcontrol(9)can
beusedtoreducethetransmitterpowerbelowthemaximum
setduringstartuptoaminimumofpowerlevel2.
INITIALSEARCHTECHNIQUE
Itisstronglyrecommendedthatusershaveelectronicdevices
concealedforthembyacolleagueinordertogainpractical
experienceundercontrolledconditions.
SomeusersprefertocarrytheSuperBroomwiththecarrying
straparoundtheneckratherthanovertheshouldersothat
thefrontpaneldisplayiseasilyseen.
17
15
Serial Comms Port

AUDIOTELINTERNATIONAL
Ltd–Issue3.1(09/2004)
Controls&Indicators
2
LISTEN/MODE
Thefunctionofthisbuttondependsonwhichsignalsource
isselected.WhentheComparebuttonisselectedthisbutton
actsastheModebuttonasdescribedbelow.When2ndor
3rdsignalsourcesareselectedthisbuttonactsastheListen
buttonasdescribedbelow
Listen
SelectsListenaudiooutput,thisallowsyoutolistentothe
returnedsignalviaanAmplitudeModulationdetector.If
thetargetis,forexample,anelectronictimerwithanaudio
frequencyclocksignalthentheelectronicclockmaybe
heardasaregularsoundwhenLISTENisselected.
Mode
TogglesbetweenthedefaultMAN(manualpowercontrol)
andDSP(DigitalSignalProcessing)automaticpowercontrol.
Thecurrentpowermodeisindicatedonthebottomlineof
theLCDdisplay.WheninDSPmodethedecimalpointon
thesinglecharacterLEDdisplayontheantennaheadashes
toindicatethismodehasbeenselected.

Note1

Duringstartupinthe‘SetTxpower‘menuthisbutton
(listen)setsthemaximumTXpowerto500mW(EUhigh
powersetting).
3
DETECT/
�
(BACKLIGHT)
WhentheComparebuttonisselectedthisbuttontogglesthe
LCDback-lightOnandOff.ThisbuttonoperatestheDetect
functiononlyunderthefollowingconditions:

Note1

Duringstartupinthe‘SetTxPower‘menu,thisbutton
(detect)selectstheNonEUoption.ThisenablestherotaryTX
outputpowercontrol(9)fortheoperatortosetpower,please
refertoAppendixBforguidance.
InNonEUoperationtheOptimumTxchannelisselected,
frequencyhoppingisdisabled,detectfunctionenabledand
theunitisnolongerEUcompliant.
16
SuperBroomPlusTA–OperatingManual
OPERATION
BASICDESCRIPTION
TheTypeApprovedSuperBroomisafrequencyagile
non-linearjunctiondetectorutilisingDynamicChannel
allocation.Thereareatotalof19channelsavailable
withintheoperatingbandof869.4–869.65MHz.When
SuperBroomisswitchedonthereceiversarecalibrated.
TheambientRFBackgroundismeasuredandasearch
algorithmselects10RFchannelsforoptimumoperation.This
ensuresthatpotentialinterferingsignalsareavoided,thereby
reducingfalsetriggering.

Note

Ifyouarenotfamiliarwiththeprinciplesofdetectionusing
HarmonicRadarorNon-linearJunctionDetectionyoumay
wishtoreadthe
TheoryofOperation
sectionlaterinthis
manualbeforeattemptingtoactuallyuseSuperBroom.
FREQUENCYHOPPINGMODE
WheneitherEU-LoworEU-Highisselectedduringstart
up,theunitwillautomaticallyhoparoundtheoptimum10
channelsat1minuteintervals.

Note1

Frequencyplanisgivenintheappendices.

Note2

whenNon-EUisselectedatstartup,theOptimumTx
channelisselected,frequencyhoppingisdisabled,detect
functionenabledandtheunitisnolongerEUcompliant.

Caution

Operationinthisun-licensemodeistheresponsibilityof
theuser.
POWERMODE
SuperBroomcanbeusedinoneoftwopowercontrol
modes.ThepowermodeisselectedusingtheListen/Mode
buttononthefrontpanel.
 
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AUDIOTELINTERNATIONAL
Ltd–Issue3.1(09/2004)
10
SuperBroomPlusTA–OperatingManual
Detect
SelectsDetectAudiooutput,thismodulatesthetransmitter
signalwithanaudiotone(approximately1KHzin
frequency).Thetonewillbeheardasaudiooutputvia
returnedharmonicsignalsfrompotentialtargets.This
functioncanbeusedintwoways.

1

TargetDetection.
Ifnotargetisdetectedrandom(white)
noiseisheardthroughtheloudspeakerorheadphones.Ifa
targetisnearbybutitsreturnedsignalisweakthetonewill
beheard,accompaniedbynoise.Asthereturnedsignal
increasesthetonebecomesclearer.Someusersmayprefer
tousethismodeasamethodofinitialtargetdetectionand
laterswitchingtoClickmodetopinpointthetarget.

2

Conrmation.
Whenareturnsignalisdetected,toconrm
thesignalisaresultofSuperBroom’stransmissionratherthan
aninterferingradiosourcetheDetectfunctioncanbeused
tolistenfortheaudiotone.Ifthesignalisfromaninterfering
sourceotheraudiosoundswillbeheard.
Theright-handcolumnofbuttonsisusedtoselectthesignal
source.

Caution

Operationinthisun-licensemodeistheresponsibilityof
theuser.
4
COMPARE
SelectstheComparefunctionasthesignalsourceforthe
audiooutputandsignalstrengthindicatedontheantenna
headdisplay.Thisfunctionshowsthedifferencebetween
thetwoharmonicreturns(secondharmonicsignalstrength
minusthethirdharmonicsignalstrength).Sincethe
comparativeharmonicreturnsfromelectronictargetsdiffer
signicantlyfromsimplemechanicalnon-linearjunctions
thisprovidespowerfuldiscriminationagainstfalsetargets.

Note1

OnlytheClickaudiooutputsettingcanbeusedwiththis
function,andisautomaticallyselectedbySuperBroom.
PWR-8 DSP 08.2V
Line 1 Compare signal strength
Line 2 2
nd
harmonic signal strength
Line 3 3
rd
harmonic signal strength
Line 4 Control Setting Summary
Power Output Setting
DSP - automatic power setting
MAN - Manual power setting
Battery voltage
Controls&Indicators
Tx Synthesiser
Tx Synthesiser
Restart CH **
Restart CH **
FAILED TO LOCK
FAILED TO LOCK
If SuperBroom displays an error messages, restart
the SuperBroom to reinitialise the system. If the error
persists please contact your dealer.
ERRORMESSAGEDISPLAY
Anexampleofanerrormessageisshownbelow:
THEDISPLAYDURINGOPERATION
AftertheStart-UpsequencetheSuperBroomLCDwillshow
theoperationaldisplay.Duringdetectionofatargetthe
displaymightshow,forexample:
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AUDIOTELINTERNATIONAL
Ltd–Issue3.1(09/2004)
Controls&Indicators
5
2
ND
Selectsthesecond-harmonicreceiverasthesignalsource
fortheaudiooutputandsignalstrengthindicatedonthe
antennaheaddisplay.
6
3
RD
Selectsthethird-harmonicreceiverasthesignalsource
fortheaudiooutputandsignalstrengthindicatedonthe
antennaheaddisplay.
7
LCDDISPLAY
SeeunderFrontPanelDisplaysectionLaterinthismanual.
8
SQUELCHCONTROL
Thissetsasignalstrengththreshold.Ifthesignalstrengthis
belowthethresholdtheaudiooutputiscutoff.
Thesquelchcontroloperatesin‘COMPARE’,‘2nd’and‘3rd’
modes.
9
POWEROUTPUTCONTROL


Note

WithinEuropewhereTypeApprovalisalegalrequirement,it
istheusersresponsibilitytocomplywiththelegalmaximum
powerforthecountrywheretheequipmentisbeing
operated(fortheUKthisisthehigherEUlimit(500mWerp),
operated(fortheUKthisisthehigherEUlimit(500mWerp),
operated(fortheUKthisisthehigherEUlimit(500mWerp),
whichissetduringstartupinthe‘SetTXpower’menuby
selectingEUHigh).
AdjuststheoutputpoweroftheSuperBroomtransmitter.(see
appendixBforSuperBroomTXoutputpowerlevels).
DependingonthePowerModeselected(seeunder
mode-2
LISTEN/MODE
earlier)thecontrolisusedasfollows.
Inmanualmodethecontrolisusedbytheoperatortoset
theoutputpoweratalltimes,fromthemaximumsetduring
startupdowntoL.
14
SuperBroomPlusTA–OperatingManual
AUDIOTEL INT
AUDIOTEL INT
SUPERBROOM + TA
SUPERBROOM + TA
ADVANCED NLJD
ADVANCED NLJD
SW400725v*.*
SW400725v*.*
Calibrating RSSI
Calibrating RSSI
Tx Synthesiser
Tx Synthesiser
SET TX POWER
SET TX POWER
CLICK = EU Low
CLICK = EU Low
LISTEN = EU High
LISTEN = EU High
DETECT = Non EU
DETECT = Non EU
Manufacturers Name and Product type
Software release number
Automatic calibration of both RX1 & RX2 receivers
signal strength indicators RSSI outputs and measures RF
back ground.
This step tunes the transmitter. The frequency set will
depend on the RF back ground
To set the maximum power for the transmitter. Choose
EU Low or EU High for EU operation. Choosing Non EU
allows the user to set Tx power using the power output
control (9), refer to appendix B as a guide.
FRONTPANELLCDDISPLAY
STARTUPDISPLAY
TheLCDwillshowthefollowingsequenceofeventsas
SuperBroomcarriesoutautomaticprogrammingand
calibrationofthetworeceiversandtransmitterwithinthe
unit.ErrormessageswillbeshownifSuperBroomdetectsa
problemwithinternalcircuitry.
11

AUDIOTELINTERNATIONAL
Ltd–Issue3.1(09/2004)
12
SuperBroomPlusTA–OperatingManual
InDSPmode,SuperBroomautomaticallysetsthepower
levelrelativetothemaximumTXlevelsetatstart-upin
the‘SetTxPower‘menu.Thepowercontrolallowsthe
transmitterpowertobereducedfromthemaximumset
duringstartupdowntolevel2.
10
VOLUMECONTROL
Adjuststheaudiooutputlevel.
11
HEADPHONESOCKET

Caution

Alwaysreducethevolumecontroltoitsminimumvalue
beforeconnectingtheheadphones.SettheSquelchcontrol
toitsminimumvaluesothattheaudiolevelcanbegauged
whensettingthevolumecontrol.
TheheadphonesocketabovetheVolumecontrolissuitable
fora1/4inch‘Stereo’typejackplug.Theaudioamplieris
capableofdrivingarangeofheadphonetypes.
12
BATTERYCHARGESTATUS
TheBatteryChargeStatusLEDisonlyilluminatedwhenthe
externalAC/DCAdaptorissupplyingpowertoSuperBroom.
■

WhenitisilluminatedRedtheinternalbatteryisbeing
charged.
■

WhenitisGreentheinternalbatteryisfullycharged.
13
ONBUTTON
PressthisbuttontoturntheSuperBroomon.
14
OFFBUTTON
PressthisbuttontoturntheSuperBroomOff.
15
SERIALCOMSPORT
9-wayD-typeATEserialinterface.
Controls&Indicators
THEANTENNAHEADDISPLAY
TheSuperBroomAntennaHeadincorporatesabargraphand
asinglecharacterLEDdisplay.
BARGRAPHDISPLAY
A16-segmentbargraphmimicsthesignalstrengthdisplay
forthesignalsourceselected.
COMPARE
-displaysthedifferencebetweenthesignals
fromthetworeceivers.Ifthethirdharmonicisstrongerthan
thesecondthereisnooutput.
2nd
-displaysthesignalstrengthofthesecondharmonic.
3rd
-displaythesignalstrengthofthethirdharmonic.
SINGLECHARACTERDISPLAY
Whenunitissetto‘DSP’modethedecimalpointonthe
singlecharacterdisplaywillash.Whentheunitissetto
‘MAN’(Manual)modeor‘DSP’modethecharacterdisplay
indicatesthetransmitteroutputpowersettingintherange:
L123456789H
T
wistCloc
TwistClocT
kwisetotighten
kwisetotighten
T
wist
TwistT
Anti-cloc
Anti-cloc
kwise
toloosen
toloosen
BARGRAPHDISPLAY
13