Lowrance X-3 Operation User manual

INSTALLATION AND OPERATION MANUAL
DIGITALOFF/ON
DIGITALWsSIZE
AUTORANGING OFF/ON•
HIGH-SPEED ScrollON/OFF
CLEAR ENTRY
CLEARSCREEN
FREEZECHART
RESTARTCHART
DISCRIMINATION
AUTO-RANGING W/ZOOM
BO1TOMTRACK
INCREASESENSITIVITY
DECREASESENSITIVITY
INCREASECHART SPEED
DECREASECHARTSPEED
VIEW
CHART SPEED
WITHOUTCHANGING
TURN OFF/ON
AUTO
SENSITIVITY
TURN ON/OFFLIGHTS
FEET-FATHOMS-METERS
CHART ALARM SET
DEPTHALARMSET
CLEAR ALARM
TURN ALARM
SPEAKEROFF/ON
COMMAND SUMMARY
2nd-5
2nd-2
2nd-B
2nd-4
2nd-Oor2nd-2nd
2nd-0-0
STOP/RESUME
STOP/RESUME
0,1,or 2-DISC
WINDOWSIZE-2nd-8
PRESS>KEY
PRESS<KEY
PRESSFAST KEY
PRESSSLOW
KEY
PRESS2nd-FASTorSLOW
PRESSAUTOKEY
2nd-9
2nd-6
SELECT-SHALLOW
SETorDEEPSET-
UPARROWorDOWNARROW TO
ADJUST
DEPTH
SELECT-SHALLOW
ALARMDEPTH-
SHALLOWSET-DEEPALARM DEPTH
-
DEEPSET
2nd-O-SELECT
NOTE KEY'
988-0105-04
X-3
LCG RECORDER
•LOWRANCE ELECTRONICS, INC.
12000 E. SKELLY DR.,TULSA, OKLA. 74128
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INDEX
Installation 2
PowerConnections 3
BASIC OPERATION 4 SHALLOWWATER OPERATION
OFF/ON In
veryshallow water, (lessthaneightfeet) theLCGmayoperatebetter
Sensitivity 5 withthe
automaticand digitalfunctionsturnedoff.
ChartSpeed 7 ______ ______
Clear 8 The
easiest
way
todothis istopress I 2ND I I 4
J ( HISPO-
Range o ______ _______
AutoRange 8 Next, selectadepthrange.
LowerLimit 9 lithesensitivity
istoo
high,press
UpperLimit Selecting
thehigh speedscroll featurenotonlygives
ahighàhat
speed,
Digital butalsoturnsoffthe
digitalsonar,
autosensitivity, andautoranging.
Ifa
ALARMS " slowerchart
speedisdesired,
pressthe 2ndkeyandthenthe4
key
Chart
Alarm 14 again.
ThiswillturnofftheHighSpeed
Scrollmode,however
theauto-
ClearingChartAlarm 15 maticsensitivity, auto ranging
anddigitalfunctionwill remainoff.
Depth
Alarm 15
ClearingDepthAlarm 16 Thesensitivity
istoohighifthescreenappearsblack,obscuring
the
Light 17 bottom
signal.
Discrimination 17
ADVANCED OPERATION 18
HighSpeedScroll 18
FASTRAK 19
Feet-Fathoms-Meters 20
Auto Range with ZoomBottomTrack 21
AutoSensitivity 22
OtherTips 22
Transducersand Cone Angles 23
Signal Interpretation 24
FishSignals 25
SurfaceClutter 27
Water
TemperatureandThermoclines 27
Surveying
aLake 29
BaitFish 29
Troubleshooting 30
Specifications 31
RowtoObtainService 32
SchematicDiagram and PartsList 32
SHALLOWWaterOperation 34
1 34
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Range: 20to40feet
Discrimination: Level1
HighSpeed
Scroll: On
Sloping
Bottom,Large Fishfrom 22to34feet
Range: 5to40feet LargeFishonBottom
Fishat19feet
SurfaceClutter
Extendsto15feet
33
INTRODUCTION
TheLowrance
X-3LiquidCrystal
Graph(LCG) isacompact unitthat
packsmorepowerand features
thanany othersonarusingaliquidcrys-
taldisplay(LCD.).
TheLCD.setstheX-3apartfromothersonarunits.Insteadofastylus
writingonchartpaperoraflashing
neonlight,the
X-3displaysthedepth
information
onascreenusingsmallsquares
whichturnblackwhen
an
echoisreceived. Aseach echo isdetected,
thesignalsmoveacrossthe
screen,leaving
behindarecord oftheareathatwas justpassed.
No other
sonarhasasmany
automaticfeaturesas
theX-3.Onceturned
on,itwillfindanddisplaythebottom
signal,fish,
andothertargets.
Asthe
depthofthebottom changes,
theX-3willautomatically
change the
range,sensitivity,and other controlssothatthebottomwillalwaysbe
displayedonthe screen.
Ifdesired, theonlykeyonthekeyboard
that
needstobetouchedistheoff/on key.
However,
theX-3hasbuiltin overridecapabilitythatallowsthefeatures
tobeused in anycombination
tobestsuit local conditions.
The
X-3isnitrogen filled andsealedforcompletewaterproofprotection
oftheinternal
parts.Theliquidcrystaldisplayandkeyboardare back-
lightedforeasyuseat
night,andtheX-3isfullycovered by
aoneyear
Lowrancefull warranty
whichcovers allpartsand laborforone yearfrom
dateofpurchase.
INSTALLATION
TheX-3may
beinstalledinany convenientlocation,provided itcanbe
tiltedforthebestviewingangle.Rolesin thebracket baseallowwood
screworthrubolt
mounting. Thebracket maybeattached
toaluminum
panels
withsheetmetal
screws,however,
a
pieceofplywoodmaybe
requiredonthebackofthin
fiberglasspanels
tosecurethe
mounting
screws.Stainless
steelisrecommended
forallmountinghardware.Make
certainthere isenough
roombehind theunittoattachthepowerand
transducercables.
AYe" holeisinthebaseofthe gimbalbracketthat allowsthepowerand
transducercablestoberouted straightdown throughthemountingsur-
face.
Thesmallestholethatwillpassoneconnectorthruis¾".Thiswill
allow
thetransducerconnectorandcabletobepassedupthroughthe
holeandgimbal bracket,
thenthe
power
cablewirecanbepushed down
thruthebracketanddash.
Afterthecableshavebeenrouted,the hole
maybefilled with siliconerubberadhesive(RTV), orthebracket canbe
offsetsothatthe
majority
oftheholeiscovered.
2
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POWER
CONNECTIONS
TwelvevoltDCpowershould besuppliedby
theboat'selectricalsystem.
The
power cablemaybeattachedtoanaccessory
orpower
buss, butif
you haveproblems
withelectricalinterference
(randomdotsorlinesthat
show whenevertheboat'sengineorotheraccessoryison),thecable
shouldbeattacheddirectlytothebattery.
Thepower cablehastwowires,redforthe
positive
lead and black is
ground ornegative.
An in-line fuseholder
containing
a3
amp fuseis
suppliedwiththeX-3.Thisshouldbeattached totheredwireonthe
powercablewith the
crimp connector.The
otherend ofthefuseholder
should beattached
tothe
battery
oraccessorybuss. Ifthecable isnot
longenough,splice ordinary#18 lamp cord toreach. Justbecertainthat
thefuse holderisasclose tothepowersource(battery
oraccessory
buss)
aspossible. Thiswillprotectthe
powercableand unit
in theevent
ofashortTheX-3isprotectedfromaccidentalpolarityreversalsandwill
notbeharmedifthe
wires are reversed. (However, theunitwillnotwork
untilthe
properpolarityisapplied.)
Electrical noisepicked upbythepowercablecanbeminimized
byrout-
ingitaway
fromother
possiblesourcesofelectrical interference.Oneof
thelargestnoisegeneratorsisthe
engine'swiring harnessthatrunsfrom
the
enginetotheboat'sinstrument
panel. Thisharness usuallycontainsa
wire forthetachometerwhich radiatesRF(radiofrequency)
energy. For
the
best
results,
keepthe power andtransducercablesawayfromthe
enginewiring.Bilgepumpsare alsonoisy, so
trytokeep
theX-3'scables
awayfrom them,
too.
VHFradioantenna'scoaxcable radiateRFenergy
athigherpower levels
than eventhe
engineswiring hamess.Itis
veryimportant
tokeep
the
X-3's
power
andtransducercablesasfarawayas
possible
fromtheVHF
radio'santennacable.
HOWTO OBTAIN
SERVICE
Ifyouhaveaproblem
withyoursonarunit, pleasegive
usachanceto
helpbeforesendingitinfor repair.
Assistancecanoftenbeextendedbytelephoneorletter.Write orcall one
ofourAuthorizedServiceCentersortheLowranceCustomerService
Department inTulsa,
OK.
Ifyoulive outofthestateofOklahoma,
call1
-800-331-3889,
toIlfree.
Ifyoulive in the stateofOklahoma,
callcollect918-437-6881.
Pleasedetailtheproblem
youareexperiencing.
Our
ServiceDepartment
maybeabletosaveyoutheinconvenienceofreturning your unit.
Ifitisdeterminedthat
your
unitmustbereturned, full shippinginstruc-
tionswillbeprovided.
SCHEMATIC
DIAGRAMAND PARTSLIST
Should
youdesire aschematicandpartslistforyourLowrance
sonar,
send$1.00totheaddressbelowand itwill be mailed
toyoupromptly.
Pleasebesureand
giveusthe modelandserialnumberof
your
Lowrancesonarunit
Mail To: LowranceElectronics
12000 E.
SkellyDr.
Tulsa, Oklahoma74128
3 32
Figure1
Ground
N
eq
alive)
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SPECIFICATIONS BASIC OPERATION
Dimensions 5¾"Hx8°/16"W
x2%"D
Weight 1¾pounds When firstturnedon,theX-3 automaticallyadjusts
thesensitivity, range,
Transmitter 192kHz and chart speedaccordingtowaterandbottomconditions.Infact, it can
beleftin this modeand it
willtrackthebottomand displayitatalltimes,
Output
Power 600wattspeaktopeaktypical automatically changing
therange asthebottomdepthvaries.Thesensi-
75wattsRMS tivitywillalsochangeasrequired, tokeepthebottomsignaldisplayed.
If
Receiver
Sensitivity >90db present,
fish orothertargetsmaybeseen.At first,operatetheX-3in the
automaticmodeonly.
Justturn itonand watch itwork.Then,readthe
Operating Current 200 ma(lightsoff) followingchapterontheX-3'sbasic operation
and learnhowtoadjustit
500 ma(lightson) foryour specificneeds. Later, readtheAdvanced Operationsectionto
makethemostoutoftheX-3's remarkable
capabilities.
Operating Voltage 9-15vdc
Numberofpixels 82x32
2624Total
DepthCapability 300'-500' typical (with20degree
transducer) OFF/ON
Theoff/onkeyisinthe lower
righthandcornerofthe keyboard.
Itwas
500'-700'
typical(with8
degree placed inthis locationsothatitwould beeasytofind—evenatnight.
transducer)
Display
ScrollSpeed .5"perminute(minimum,normal mode)
8"perminute(maximum, normal
mode)
32"perminute(NighSpeedScroll) Turning power
on
ToturntheX-3 on, press theoff/onkey. (Note: theunit
will beepevery
Temperature 0 degreesCto+60degreesC time akeyispressed.
Thisishow the
X-3signalsthatanentryonthe
(operating) +32degreesFto140
degreesF keyboardhas
beenmade.)Thechartlightswillbeginflashing, thenturn
themselvesoffaftersixseconds.
Amessage(seefigure 4)willbedis-
Temperature —40 degrees
Cto+80degreesC playedandthenumber"0"willflash.This numberisthedigitalbottom
(storage) —40 degreesFto+176
degreesF depthdisplay.
Aftertheunithasfoundthe
bottom,
the
depthwillbe
shown in the
display,propersensitivity
and range willbeselected, and
returnechoesfromthe bottom,fish,orother
targetswillbeginscrolling
across thedisplay
Turning poweroff
ToturntheX-3off, press and HOLDtheoff/on keyuntilthe displayis
erased.This may takeseveralseconds.Theunitwillbeepcontinuously
untilypy releasetheoff/on key. Remember, you mustholdtheOff/On
keydownuntilthescreen.iserased.Ifyoudon'tholditforseveral
seconds,theunitwon'tturn off.
31 4
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SENSITM
BAR
•'i1F9i1'1bth'
AUTO j'tU'
Figure2
SENSITIVITY
Whenfirstturned on,theX-3isin theAUTO
SEARCH mode.This means
thesensitivity and range
arebeingautomaticallyadjustedby
themicro-
computer
tofindand lockontothebottom.
The
sensitivity
canbeleftin theautomatic
mode,oritcanbemanually
adjusted higheror lowertosuitconditions.
Thesensitivity levelsettings
aredisplayedby ahorizontalbaratthe
top
ofthedisplay. SeeFigure2.
Whenthe
sensitivity
isatminimum, thebaris
veryshortAssensitivity
is
increased,
thebarwilltraveltothe
right
increasingin lengthcorresponding
with
thehighersensitivityselling.
Whenthe
sensitivity
issettomaximum, thebarwill run completely
acrossthe
top
ofthe
displayfromlefttoright
TheAUTOkeyatthe
topmiddleposition
onthe keyboard tUrns
auto sen-
sitivity
offand on.Pressitonce,andautOsensitivity
isturned off. Pressit
again, and autosensitMtywillbeturnedottTheautoannunciatoris
belowthesensitivity
bar,and canbeseenwhentheautosensitivity ison.
5
TROUBLESHOOTING
Iftheunitworksproperly when
stopped
oratlow
speeds,
butlosesthe
bottom
signalathighspeed,
thetransducercouldbeimproperly
installed.
Readthetransducerinstallation
manualforthecorrectmounting
procedure.
Ifthetransducerisinstalledproperly,
thenelectricalinterferencecould
bethecause.Doublecheck theinstallation, particularly
thepower and
transducercablerouting. Makecertainthat
theyare away
fromthe
engine
wiringorotherwiringharnesses,
especially
thetachometer
wiring.
Shouldthe
display"freeze'checktoseeifthe toplineofthedisplayor
the
digitalbottomdepthisflashing.Ifitis, thentheunitisworking,butthe
digitalhaslostthe
bottom
signal,and itistrying
tofinditThechartstops
scrollingwhenthe digitallosesthebottom. Itwillstartmoving againwhen
the
digitalregainsthe
bottom.Ifneitherthetoplineofthedisplaynorthe
digitalbottomdepthisflashingandthechartwon't
scroll,
then turnthe
unitoffandbackonagain. Theunitshouldbeginworkingnormally. Ifit
cannotfindthe bottom
signal,andyou
are in shallow
water,(lessthan
eightfeet)
followingthe
directions onpage24concerning
shallowwater
operation
mayhelp.
Iftheunitdoesn'tturnonwhen the ON/OFFkeyispressed, thencheck
thefuseorbattery
conectionsfortightness orcorrosion.
Fishsignals,especially
in shallowwater,
donot always
arch,but
appear
asirregularlyshapedmarks. Fish archesare mostlikely
seenin 40feet
ordeeperwater,usingazoomrange(forexample
40to60feet). Read
thesection"FishSignals"
onpage25.
Iftheunitwillnotturnoff, rememberthat
youshouldpress
andHOLD
the
ON/OFF keydownuntilthedisplaygoesblank. Ifyoudon'thold the key
down,theunitwon't turnoff:
On rareoccasionsand in certain installations,electricalinterference
couldcausetheLCGtodisplayrandominformationonthescreenorthe
keyboardmaynotfunctionproperly. (Forexample, pressing theON/OFF
keywill notturntheunit
oft).To restoreittoworkingorder,first
try
pressing
2nd-O-0. Thisshouldclearthe screen.Ifthisdoesn'twork,
simplyunplug
the
power cablefromthebackofthe unitplugitback
in,
andturniton.
30
liii
II
:E;EAF:cH
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SURVEYING ALAKE
The
mostsuccessful
anglersonanylakeor reservoirarethosewhofish
itday afterday andyearafter
year
until
they
learnthehotspotsthat pro-
ducefish consistently.Theydiscoverthroughexperiencewhere,and at
what
depth, theycan expect
tofindthe kind offish theywantatanysea-
son.And they realizethattheseproductive
areaschangethroughoutthe
year depending
onwaterlevel,temperature,food,andotherfactors.
WiththeaidoftheX-3,anyonecaneliminate
guessworkand concen-
trateontheareaswherefish are likelytobe—evenifitsthefirsttimeon
thelakel
Themostefficient
waytobecome acquainted
witha
body ofwateristo
surveyitwithyourX-3.Startoutwith a mapofthe lake,ifpossibleand
indicatethe
promising
spotsin relationtolandmarksonshore.
As
yougo
aboutyoursurvey,your
X-3willtellyou thedepthand kindof
bottom,Itwill also reveal fish,perhapsschools ofcrappiesorwhitebass
suspended
overdeepwater,Ifmultiplesignalsonthedisplayindicatea
good school,itisworth ittostopandfish forthem.
You maynotgetany
farther.
Keep
afewLowranceFish-N-Floatsinthe
boat,readytotossoverboard.
WhentheX-3 indicates a
school offish, throwthe
buoy out.The string
willunwinduntilthesinkerhitsbottom.
Then,
because ofthe
marker's
flat
shape,itwon'tunwind anyfarther Withtheschoolthus marked,youcan
make
your
turnandcomebacktofish in
exactlytherightspot.
Thisis
essentialwhenyou'refarfromshoreonabiglake.Unless
youmarkthe
schooloffishwhenyou'reover it,youmaynot beabletofinditagain.
BAITFISH
Theimportance ofbaitfish tosuccessfulfishingcan'tbeover-
emphasized. Theyarethe
principlefood of gamefish in mostwaters.
Bait
fish arethe
planktonfeedingforagefish,
suchasminnowsandshad.
Theycanalsobethe
youngofgamefish,
suchascrappies,bluegill,and
whitebasswhichalsofeednearthesurface.
Mostbait
fishare concentratedwithin fivefeetofthesurfacewheresun-
lightpromotes
thegrowthofthe
planktononwhich they
feed.One
methodoffishingistousetheX-3 tofindthebaitfishfirst.Usually, game
fish willbe nearby—oftendirectlybeneaththeschool ofbaitfish at12to
15feetdeep.
AUTO -
AN
NuNCIATOR
WEAK
BO1TOM—
SIGNAL
RANGE
0-96FEET—
Figure3
\SURFACE,
CLUTTER
Figure
4
FISH
STRONG
-BOTTOM
SIGNAL
Tomanuallyadjust the
sensitivity, press
theAUTOkey.TheAUTOannun-
ciatorwilldisappear. Toincreasethe
sensitivity, pressand hold the right
arrow
key>untilthe sensitivity
isatthe desired level.
Theleftarrow<
decreasessensitivity inthesamemanner. Notice howthe
sensitivity
bar
movesas
youchangesettings. Whenyoupress
therightarrow key,the
barmovestotherightshowingan increase in sensitivity. Pressing theleft
arrow
keymovesthebartotheleft, showingadecreasein sensitivity.
Youcanalsoseethe
changes
onthedisplay.
Figure
3shows agraph
withtoolittle sensitivity,whileontherightthe sensitivity isadjusted
properly.Notehowthesurfacesignalisverysmall,andthebottomsignal
isalso narrowontheleftchart.Ontheright,the
sensitivity
isadjusted
properly;a
fish isnowvisible,
thesurfaceclutterismorepronounced,
andthebottom
signalhaswidened.Formoreinformationongraph
records,seethesectioncalledGraphInterpretation.
When thehorizontalbar reaches
thefarrighthandside ofthescreen,
thesensitivity levelisatthemaximumlevel.When highsensitivitysettings
areused,a secondbottomecho mayappearThisisnormaland is
causedby thereturning signalreflecting offthe surfaceofthe
water,
makasecondtriptothe bottomand back.
ToturnAutoSensitivity backon,press theAUTO key. Remember, the
automaticsensitivity controlcan beturnedofforonatany timebyusing
theAUTOkey.SeePage 22formoreauto sensitivity features.
29 6
iiiuii AUTO.
WIiCi.E J!I!fli!F
96 AUTO.
RANGING
IIIIIIIHIIIIUhIIHhII
Bo I
AUTO.
RANGING
96
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LCHARTp
SLOW STOP I FAST
RESUME
For
example, the9 keyhasasmalllabelbeneaththenumber ninethat
says"LIGHT". Ifyoupress
the9
keybyitself, theX-3thinksthatyouwant
thenumber9.However, if
youpress
the2ndkeyfirst,then press
thenine
key,theX-3willturnonthe lightsinthe
display.
The
2nd keyjustreas-
signedthe
meaning
ofthe9key
froma9toLIGHT
7 28
1 Aknowledgeofthewatertemperatures
variousfish prefer, and in which
theyusuallyremain, helpsyougetthemost
fromyourX-3.Tofindthedif-
ferent
temperatures,
a
surface temperaturemeter, suchasthe
LDT-3000isavaluableaidtoyourfishing. Thisunitprovidesan
extremelyquickresponse
toidentifying
thedesiredsurfacewater
temperatures
forvariousspecies.
Thetemperature ofwaterinthelakeisseldomconstantfromtop
tobot-
tom.Layers ofdifferent
temperaturesform,
and thejunctionofawarm
and cool layerofwateriscalled athermocline.Thedepthandthickness
ofthethermocline canvarywiththeseasonortimeofday. Indeep lakes
theremay betwo ormore atdifferent
depths.
Thermoclinesareimportant
tofishermenbecause
they
areareaswherefish areactive. Manytimes
baitfish willbeabovethethermoclinewhile
largergamefish willsus-
pendin orjustaboveit
TheX-3candetectthis invisible
temperaturelayerin the water, butthe
sensitivity
willprobablyhavetobeturneduptoseeit
CHARTSPEED
WhentheX-3isfirstturned
on,thechart speedrunsata
pre-determined
speed.Ifahigher speedisdesired,
press
and hold theFAST keyin the
chartsection ofthe
keyboarduntilitrunsatthe
desired speed. Toslow
thedisplay,
pressandhold theSLOW
key. Whenevereitherofthese keys
arepressed,
the
sensitivity
baratthe
topofthe
displaywillchange
toa
dashedline.Thisnowrepresents
thechartspeed. If
youpressand hold
theFAST key,foräxample,thebarwillstart
movingtotheright,signifying
thatthe chart speedisincreasing.
Therearethirtytwostepsofchart
speed. Byholding eithertheFAST orSLOW
keys, the displaycanbe
speededuporslowed down.Whenthehorizontal barreachesthefar
rightsideofthe screen,
thechartspeedisatitsmaximumvalue. TheX-3
will"chirp"signifying
thatthemaximumchartspeedhasbeenreached.
CHART ,-
SPEED -
uuuoflUID111111111
BAR jj Figure5
At
timesitisdesirabletostopor"freeze"
the
displaytoexamineanecho.
Pressing
theSTOP/RESUME
keyoncewil freezethedisplay.
Whilethe
displayisstopped,
the
verytop ofthe
surfacelinewillflashonand offto
signify
thattheunitisin thefreezemode.Pressing
STOP/RESUME
again
willstartthedisplaymovingatthelastchartspeedsetting.
[2ND]
2NDKEY
TheX-3hasmany
differentfunctions,butonly
alimitedamountofspace
forkeys.Therefore,
someofthekeyshavemorethan onefunction.The
key'sprimaryfunction isprintedvery large, whilethesecondaryfunction
isprintedunderneathwithsmalllettersofadifferentcolor.Thekeyin the
middleofthe
bottomrowlabeled2nd mustbeusedtoaccessthe
secondaryfunctionsofthekeys.
"WI AUTO.
111—----
4.
A
= :
rn
Ut'
—THERMOCLINE
Figure24
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SURFACECLUTTER
The
markings
atthetop ofthescreenrepresent thesurfaceofthewater
whichcanextendmany feetbelowthesurface.Thiscaninterferewith
fish signalsorothertargets. It'scalledSurfaceClutterand iscausedby
algae,plankton, airbubblescausedby
waveaction orboatwakes,bait
fish,ortemperature
inversions.
Thesemarksarenormalandcanbeseen atanytime
duringthe year.
It's
usuallytheworstin the springandsummer, slackingoffin thefall and
winter.
Figure23
WATERTEMPERATURE AND THERMOCLINES
Water
temperature
hasanimportant—if not
controlling—influenceupon
theactivitiesofallfish. Fisharecold bloodedand theirbodiesarenear
thetemperature ofthesurrounding water.During the
winter,
thisslows
downtheirmetabolism sothat
theycanonlyutilizeaboutafourthas
muchfood as
theyconsumein the summer.
Mostfish don'tspawnunlessthe watertemperature iswithin rathernar-
rowlimits. Troutcan'tsurvivein streamsthatget too
warm;bassand
otherfish eventually dieoutwhenstocked in lakesthatremain toocold
duringthe summer. Sofishwilldowithoutfood ratherthanventureinto
waterthatistoohotortoocold;otherswill shift position foratempera-
turechangeas
slightasone-halfofonedegree.Whilesomefish havea
wider
temperature
tolerancethanothers, eachofthemhasacertain
range
within which ittriestostay.Schoolingfish suspendedoverdeep
waterlieatthelevelthat
provides
thistemperature in
which,weassume,
they
arethemostcomfortable.
101
CLEAR I CLEJ
If
youpress akeythatisnotwhat
you
wanted,youcanwaitsixseconds
beforepressinganotherkey
andtheX-3willautomatically
clear or
"forget"
thelastkey
entered.
Forexample, if.youwish toturnonthe lights,
theproperkeystopress
are2nd
-9.However, ifyouaccidentallypressed the0keyinsteadofthe
2nd key by
accident,youcould waitsixsecondsuntilthe
0
disappears
fromthe
screen, then press2nd-9.Anotherquickway
toclearanincor-
rectentryistopress
2nd-Oandthelast
key enteredwillbeerased.
Theentiredisplaymay
beerasedbypressing2nd-0-O. Everything
exceptthe digitalnumbers (ifturnedon)
willbeclearedfromthe
display.
RANGE
AlthoughtheX-3 will automatically
changetherange
wheneverthebot-
tomgets shallowerorgoesdeeper, there
aretimes when itisdesirable
toexpandtherange, orlookatadifferent
segment
ofthewaterbelow.
The
range canbeset anywhere
from0to989feet
onthe upper limitand
10 to999feetonthelower limit, provided
thelower limitisnocloserto
the
upper limitthan 10feet.
18
tAUTO RNG
AUTO RANGE
WhentheX-3isfirst
turnedon, theAUTORANGE functionisenabled. It
maybeturnedoffanytimebypressing
the2nd key,then the 8key. (Inthis
manual,pressingkeysin sequence
as
justdescribedwillbeshown like
this:2nd-B.)TheAUTO RANGING annunciatorin thebottomrighthand
corner ofthedisplay
willdisappear,signifying theautomatic
rangingcap-
abilityhasbeentumedoff.To returntotheAUTORANGE mode,
simply
pressthe2nd-8keysagainandtheunitwillautomatically
trackthebot-
tomand place
itin the lower4/5ofthescreen.
27 8
SURFACE
cLurrER
F
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SCALE Remember, there mustbesome
movementbetweentheboat andthefish
There areten scalemarkersprintedonboth sidesoftheX-3'sdisplayto
helpdeterminewhatthedepthofatarget
is.Forexample, ifthe
depth
rangeis0to60feet, theneach markisequal
tosixfeet.Ifthetarget
(suchasa fish)wasnexttothe5thline,
thenitis30feet deep(5lines
timessixfeet=30
feet).Tomakeiteasiertousethe
depthscale,use
rangesin multiples
often, i.e. 10,30,140,etc.
SENSITIVITY/CHAR
c::•iui
Ii.--.——
— 12
—24
SCALE
MARKERS 1llmm36
48
todevelop thearch.Usually
this means trollingatveryslowspeedswith
themainengineingear ataminimum throttle
setting.
The
depthofthewaterwillaffectthesizeandshapeofthefish arch due
tothe
cone
anglediameter. For example, ifthecone passes
over afish in
shallowwater, the
signaldisplayed
ontheX-3 maynotarchatall,dueto
thenarrowconediameterandtheresolution
limitationsof
thedisplay.
Compared
toa
papergraph,
theX-3 cannotshowasfinedetailbecause
thepixels(dotsonthe
screen)
aremuch larger thana
papergraph's.
Therefore,
theX-3cannotshowfisharchesaswellasa
graph.
Very
smallfish probably will notarch atall, while mediumsized
fishwill
show apartialarch,or ashapesimilartoanarch, ifthey're in deepwater
Large fishwillarch,butthe
sensitivfty mustbeturnedup, especiallyin
deeperwaterTherewillbetimeswhenthe sensitivity
cannotbeturned
highenoughtoget
fish archesbecauseoftheheavy
surface clutter,
therrnoclines,
etc.
Oneofthebestwaystoget
fish archesistoexpandor"zoom" aseg-
mentofthewater, forexample 40to60feet.Thesmallerthe
segmentthe
betterthe
screen resolutionwill be.
Then,
turn upthesensitivity
as high
aspossiblewithoutgettingtoomuchnoiseonthe
screen.
Inmediumto
deepwater,
thismethodshouldworktodisplay fisharches.
F LOW1
LIMIT J
LOWERLIMIT
Tochangethelower limit, press thelowerlimitdesired from 10feetto
999feetandthen press theLOWER LIMITkey. The
displaywill imme-
diatelychangetothenewdepthrangeanddisplaythenewlowerlimit at
thebottomofthescreen.
Thelowerlimitmaybechangedanytime, eveniftheAUTORANGE func-
tionison. However, ifalowerlimitisselectedthatislessthanthedepth
ofthebottomwhiletheunitisintheAUTO
RANGE mode,itwon't
accept
theentry For
example, suppose
theX-3is in theAUTO RANGE,mode
andthelower limitis75feetwiththebottomat60feet Ifanewlower
limit of55feetwereenteredonthe
keyboard, theX-3would chirp,and
keepthelowerlimit
settingof75feet.
Figure 6
LILI AUTO.
RANUING ——"OHIO
P1
Figure22
9 26
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FISHSIGNALS Forexample,
toset
therangefrom0to31 feet, press3-1-LOWERLIMIT.
Thesignalsdisplayed
ontheX-3by fish canbeidentifiedby
various
shapedmarkings
in certainpatterns, asopposed torandommarks
createdbynoise, orthe
solid,
continuousmarkings madeby thebottom.
Individualfish can, at
times,
bedistinguishedby acharacteristicarch that
separates
themfromtheirstationarysurroundings. Thereason
forthis is
shownbelow. Thedistancetoafishwhen itmovesintoasonar'scone of
soundisshown as"A" Figure 21. Whenthefishhasmovedintothecen-
terofthecone,
thedistancetoitwillbeshorter, "B"andasitmovesout
ofthecone, thedistancewillincreaseagainasshown in "C".
Ifa
partialarch occursmostofthetimeonyour
unit
(themarkcurves up,
butnot backdown,orvice-versa)
itcouldbethetransducerisnot
pointedstraightdown.Ifthe transducerismountedonthe
transom,
adjustituntil thefishshowthe distinctivearch.This maytake some
trial
and error
untilthecorrectmountingangleisachieved.
NOTE:
Althoughthe maximum
lowerlimitoftheX-3is999 feet, the
actualdepththattheX-3 will reachisdependent
onthewater conditions,
bottomconditions, andthe
qualityofthetransducerinstallation.
IUPPER
LIMIT
UPPERLIMIT
Itisoftendesirable
toexpand asectionofthe
displaytoshow more
detail.ThisismadepossibleontheX-3byusingtheUPPERLIMIT key.
Tochange the
upperlimitofthescreen,
simplypress
thedesireddepth
(anynumberbetween0and 989
feet)and thenthe
UPPERLIMIT
key.The
only restrictiononthe
upperlimitisthatitmustnotbecloser
tothelower
limitthan 10feet.
Inotherwords,ifthelowerlimitissetto81 feet,
the
upperlimit cannotbeset
anycloserthan71feetAten foot
segment
or
larger(20, 30, 120,etc.) isrequired.
Upperand lowerlimitsmaybe setinvariouscombinations
toshow seg-
mentsfromthe surfacetothebottomand nearlyanywherein betweento
expandor"zoom"a
portionofthe display.
Ifatenfoot
segment
is
chosen,thenthescreen resolutionis1½".Thismeans
thateach dotis
equalto1½ inches
whenatenfoot
segment
ischosen.
25 10
.p
I'll" LOWERLIMIT Figure
7
AP\c
Figure21
—III0
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Example: Setrange
to16to31 feetPress: 1-6-UPPER LIMIT then3-1-
LOWER LIMIt
Figure8
UPPER
LIMIT
NOTE:WhentheX-3isin theAUTORANGEmode,the
upper limitmay
bechangedatanytime. Ifthe
upperlimitischangedwhiletheunitisin
theAUTO RANGE mode,
theX-3 willcontinuetoselect alower
limitthat
willkeepthebottom
displayedin thelower¾portionofthescreen.
15
DIGITAL (PtGrTAL
Acompletedigitalsonarisincorporated
intotheX-3. Itautomatically
dis-
criminatesbetweenthevalidbottomechoesand falseechoesfromfish,
thermocline,
orsurfaceclutterThe
digitaldisplay
willshow
onlythebot-
tom depth.Itmaybeused atanytime, inconjunctionwith
any
other
modetheX-3
maybein (withthe exceptionofFASTRACK orHighSpeed
Scrollmodesdescribedin the
Advanced
Operationsection ofthis
manual).
Whenthe X-3 isturnedon, thebottomdepthwill bedisplayedonthe
screen.
The
20degreetransducerisalmost
always
the
besttouseinfresh water,
while the8degreeisusedmostlyin saltwaterIna
deepwaterenviron-
ment, (300feet—fresh
water,100feet—saltwater) the narrowcone
angle
ismore desirablebecause itcanpenetrate
tomuchdeeperdepthssince
thesoundenergy
isconcentratedin asmallerarea.
Boththe8degreeandthe20degreetransducers
give
accuratebottom
readings,
even
thoughthebottom signalismuchwideronthe20degree
modelbecauseyouareseeingmoreof
thebottom.
Remember, theshal-
lowedgeof
the
signalshowsyouthetrue
depth.
Therestofthe
signal
tellsyou whether
youareover rocks, mud,dropoffs, etc.
Saltwater boatsneedtohavethetransducer
painted
with athincoat
of
anti-foulant
painttoprevent
organisms
fromgrowing.
Ifunchecked, bar-
naclesand other
marine
growthwillcausea decreasein the transduc-
er's sensitivity. Do notuseametalbasedanti-foulant
paintas itwill
decreasethe
transducer'ssensitivity also.Therearespecialanti-foulant
paints
carried
bymostmarinedealersspecificallydesigned for
transducers.
SIGNAL INTERPRETATION
Because
yourX-3isbothextremely
sensitiveandpowerful, itcan
give
you
anaccuratepictureofthekindofbottomover
which
your boatis
passing. Abottomoffirm sand,gravel, shell,
orhard clay returnsa
fairly
wide
signal.Iftheautomatic
sensitMtyisturned
off,andthesignalnar-
rowsdown,thenitmeansthat
you havemovedoveramudbottom.Mud
absorbsthesoundwavesand returnsaweaksignal. Turnupthe sen-
sitivity. Ifyouhavethe automatic
sensitivity
turnedon, watchthe
sensitiv-
itybar.Astheboatpassesoverthemud
bottom,
theX-3 willautomati-
cally
increasethe
sensitivity
tomaintaina
goodbottomsignal. The
sensitivity
barwillhelpyouin determining
ifthebottomissoftorhard. Ifit
increaseswhilein the same
depthofwater,
thentheboat hasmoved
overasoftbottom.Ifitdecreases, thenitisoverahardbottom.Of
course,
asthewaterdepth increasesordecreases,
the
sensitivity
will
change,
also.
Bigrocks or stumps
onasmooth bottomsendbacksignalsabovethe
bottom, the distancedependingupontheirheightIfyouwatchas
you
approach
apostora
treestump, itwill beclealryvisable
asashort line
extending
abovethe
bottomsignal.
11 24
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TRANSDUCERS ANDCONEANGLE
Thesoundwavesfromthetransducrgo
downihtothewaterin acone
shapedbeam, muchlikethebeamfrOma flashlight The anglebetWeen
the
outsideedgesof theconeiscalledthecone angle.
Lowranceoffersachoiceoftransducerswith either an8or20degree
cone angle thatwill interchange with any! ofthe192kHzsonar products.
Inother
words,anyLowrancesonarinstrumentcanbe usedwith any
Lowrancetransducerofthesame
frequency
without
retuningofanykind,
and nolossofperformance.
However, theuseofanyothermanufactur-
ers' transducerwillresultinaloss ofperformance.
Generally, widecone angletransducers(20degrees)
are ideally suited
foroperating in shallowtomediumwater
depths.
The20degreecone
angle
allowsyou toseemoreoftheunderwaterworld.In 15feetofwater
the20degreeconecoversanareathat'saboutsixfeetacross.The8
degreetransducercoversonly
aboutatwo footcircle.
_________ 50'
150'
Foreasier reading, thesizeofthe
digitalnumberscan bedoubledby
pressing
2nd-2.
Toreturnthembacktothesmallersize,press2nd-2
again.
Thenumbersmustbedisplayedonthescreenbefore
youpress
2nd-2.
23 ! 12
BOTTOM
DEP11-l
Depth Cone Angle
Diameter
§:-
50
boo 7ft. 18ft.
14 35••
liso
200 21 53 28 71•
Figure9
100'
iumIIIHhi
Figure20
200'
8°at3db
F: Li
Figure10
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Toturnthe
digital display
off,or backonagain, press2nd-5.
NOTE
Evenifthe
digitalnumbersarenot beingdisplayed
onthe
screen,
the
digitalsonarwillstill continuetofunction.Ifthe
digitallosesthe bottom
signal,
thechartdisplaywillstopuntilthedigitalfindsthebottom.Ifthe
digitalnumbersarebeingdisplayedonthe screen,
thechartdisplaywill
stop,butthe
digitalwillflashthelastvalidbottom depthuntil itregains
thebottomsignal.
Ifthechartisin the
freezemode, the
digitaldisplay
willcontinuetoshow
thebottomdepthasitchanges. Itdoesnotfreezewhenthechartdoes.
This
givesanaccuratemeansofdetermining theprecisebottomdepthat
alltimes. In
fact,theX-3canbeturned intoa
digitalsonar bypressing
2nd-0-5.Thiswillclearthescreenofallechoes,including
thebottom
signal, and increasethesizeofthenumbersforeasierviewing.
Todisplaythe bottomand other echoesagain,press
the
STOP/RESUME
keyin the chartsection ofthe
keyboard.
ALARMS
TheX-3hastwoalarms, achartalarmanda
depthalarm.Thechart
alarmrequiresboth anupperlimitandalowerlimitsetting.Thealarm
then "soundsoff" whenever
anecho (such asafish)isdetectedinside
the
boundariesset
by
theupper and lower limits.
The
depthalarmalsoallowsanupperand lowerlimit butitsounds
wheneverthebottomecho isdetected
outsidetheboundariesset
by
the
alarm'supperand lowerlimits. Bothchartanddepthalarmscanbeset,
thenswitched backandforth. However, theycannotbeused simultane-
ouslyandwillbetreatedseparately
in thissection.
AUTO SENSITIVITY
WhenevertheX-3is in the
auto-sensitivity
mode,itwilladjustthesensi-
tivityoftheunittothree stepsabovetheminimum required
topick
upthe
bottom
signal.(There
are 32stepsofsensitivityavailable.)
The
sensitivitymay
beadjustedwhiletheX-3 isinthe
auto-sensitivity
mode. Thismaybedesirableifthelevel ofsensitivity thatthe X-3 picked
isnot
enough
toshowfish orotherdetail. Oncethe
sensitivity
hasbeen
changed,
theX-3will increasethe
sensitivityenough
topickupthebot-
tom signal,
thenaddthelevelthatyouprogrammed in.
Forexample, ifittooktheX-3 fivesteps
ofsensitivity tofindand lockonto
the
bottom,
itwilladdthreemorestepsforatotalof
eightIfdesired, any
amountofsensitivityupto24(foratotalof32)maybeadded.Or,three
stepsofsensitivity
couldbesubtracted, however
onlythebottomsignal
wouldbe
displayedatthis low
sensitMtysetting.
Therearetwowaysofadjusting
the
sensitivity
whiletheX-3 isinthe
auto-sensitivity
mode.
Thefirstistopress eitherthe rightarrowkey>
toincreasethesensitivity
orpress theleftarrowkey <todecreaseitIfthe
valuegoesbelowthe
minimum
required
tokeepthebottom
signal,
theX-3 will "chirp'The
sameistrueifyoutrytogoabove32steps. Asyoupress
thearrow key,
the
sensitivity
barwillmovetotheleftorright,accordingtotheamountof
sensitivity
chosen.
Thesecondmethodallows
youtoentertheamountofstepsusing the
numberkeysonthe keyboard. Forexample, toadjust thesensitivity
so
that itwillalwaysbetenstepsabovetheminimum
required
tolockonto
thebottom,press the1-0-AUTO keys. The
sensitivity
willthen increase
totenstepsabovetheminimum
required,
insteadofthree.Remember,
thetotal numberofstepsis32.
OTHER
TIPS
Ifanincorrect entryismade,
waitsixsecondsforittodisappear, then
enterthe
desired number. Or, press 2nd-Owithinsixsecondsofanentry
and itwillerasethelast keystroke.
Press2nd-FASTorSLOWtodisplaythe chartspeedbarwithout chang-
ing
thechart
speed.
Whenchangingthe upperorlowerlimits, remembertheminimumdis-
tancebetweenthetwoistenfeet.Ifadistancesmallerthanten feet is
pressed,
theunitwillmovetherange toatenfootseparation. For
exam-
ple,ifthe upperlimitwas0and 9-LOWERLIMIT was entered, theX-3
woulddisregardthe9and setthelowerlimittotenfeet
13 22
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AUTO RANGEWITHZOOM BOTTOMTRACK
Anoptional Auto Range featureisAUTORANGEwith ZOOMBOTTOM
TRACK. WhentheX-3 isin the
auto-rangemode, itpicks
alowerlimit
rangethatwill keepthebottomsignalinthelower 4/5ofthescreen.The
upperlimitisnormally
settozero,unlessyouhavechangeditHowever,
a"window" canbeusedto"zoom" orexpandtheareanearthebottom
andtrackitasthebottomrisesorfalls.
Forexample, suppose thebottomis85feetdeep.Todisplaya50foot
windowaroundthe
bottom, press5-0-2nd-8.TheX-3willchoosean
upperandlowerlimitthat will place
the
bottomsignalina
fiftyfootwin-
dow.The
upper
limitofthedisplaymay read45feet whilethelower limit
maychange
to95feet.Thebottomwillbetracked and alwayskeptinside
thiswindowasitgoesdeeperorshallower Thisisuseful if
youwish to
expand
or"zoom"thelowersectionofthedisplaywithoutdisabling
the
auto-range
function.
NOTE
Theupper and lower limits cannotbechangedwhentheX-3isin the
Auto Range withZoomBottomTrackmode.
To exitfromthe ZoomBottom
Track, press2nd-B.This will turnoffAuto
Ranging, also.To returntoAuto Rangeonly,press
2nd-8again.
CHARTALARM
Thechartalarmcanbethoughtofasafishalarm.Itwilsoundwhenever
anechoisdetected
(suchasa
fish,oraschool offish)insideitswindow.
Tosetthechartalarm, press theSELECT keyonthealarmsection ofthe
keyboard.
ThewordsCHART ALARMwill bedisplayedin the lowerleft
cornerofthescreen.ToviewtheChartAlarmsetting,press eitherSHAL-
LOWSETorDEEPSET
keys.
Avertical barwillbedisplayedontheleft
sideofthescreen.This isthealarm"window".Any echothat
appears
betweenthe
top
and bottomofthebarwill soundthealarm.BothshaDow
and deependsofthebar may
beadjustedtomakeasmallerorlarger
alarm"window".
CHART
ALARM
BAR
OR
"WINDOW'
CHART
ALARM
ANNUNCIATOR
Figure11
To adjustthe
top(orshallow)alarm,press
theSHALLOWSETkey,then
pressthe uparrowkey
tomovethe
top
ofthe
window up, orthedown
arrowkeytomovethe
topofthewindowdeeper
Thebottompart ofthe
alarmwindow isset in thesame mannerPressthe DEEP SET
key,then
presseitherthe uparrowkeytomakethe bottompart
ofthewindow
moveshallow, orpressthedownarrow keytomovethebottomofthe
window deeperAfter
youreleasethekeys,
thebarwillremainonthe
screenforsixsecondsandthen disappear If
youwishtoviewthechart
alarmbaratanytime,makecertainthattheCHARTALARMannunciator
isvisable, then press eitherSHALLOW SETorDEEP SET
keysandthe
barwillbedisplayed foranothersixseconds.
21 14
uuuum AUTO.
0
r:.
A
— —M $5
I.
...OHARTALM AUTO.
ALARM RANGING
35 AUTO.
RANGING Figure19
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Ifthechartalarm issetoffby afish orthe
bottom, thealarmwillsound
andtheALARMcanbeseenatthebottomof
the
display
litherangeischanged, thechartalarmmayneedtobechangedalso,
since itoperatesindependently anddoes nottrack rangesethngs.
I'll
Thenotekey turnstheaudibletoneofforon.Whenthealarmsare
first
set, theaudibletoneisonwhich can beseen by thenoteannuncia-
tor atthebottomofthedisplay.Toturnthe audibletone off, pressthe
notekey onthe
keyboardonce.Toturn itbackon,press
thenotekey
again.
ClearingtheChart Alarm
ToturntheChartAlarmoff,presstheSELECT key toswitchovertothe
Deep
Alarm,or press2nd-0-SELECT. Theannunciator"CHARTALARM"
in thebottomlefthandcorner ofthescreenwillgooff,showingthat
the
alarmisnolongerin use.Note:Simplypressing
theSELECT key will
switchtheX-3fromthechartalarmtothedepthalarm. Allofthechart
alarmsettings
willremainin memory. Pressing 2nd-0-SELECTwill erase
thechartalarmsettings.
DEPTHALARM
The
Depth
Alarmisactually
twoalarms.Theshallowalarmgivesavisual
and/oraudiblesignalwheninwaterthat isshallowerthan thealarm set
pointThe deepalarmwillgiveavisualand/oraudiblesignalwhen in
water that isdeeperthanthealarmset
pointNotethatthisalarmwindow
isexactlyopposite fromthe
chart alarm. Also,the
depthalarmcanbeset
offonlyby thebottomsignal, not
byfishoranyotherechoes.
NOTE:The
digital mustbeon in ordertousethe Depth
Alarm.
To usethedepthalarm, presstheSELECT keyuntilthe DEPTH
ALM
annunciatorappearsin the lowerlefthandcornerofthe screen.When
firstturnedon,both alarmsareautomatically
set
tozero.To settheDeep
alarm,pressthedesired depth using thenumber
keysonthe keyboard,
then pressthe DEEPSET
key.For example, ifaDeepalarmsetting
of 55
feetisdesired,press5-5-DEEPSET.Thenumber55willshow in the
displayin largenumbersfor6secondsandthen disappear.
Nowifthe
water
depthgoes
below55feetthealarmwillsound.
NOTE:Themaximumalarmdepth setting
is999feet
16
LFT/FA/M
FEET-FATHOMS-METERS
TheX-3 can display thedepth in eitherfeet,fathoms, or meters. Whenit
isfirstturned on, the
displayreadsin feetTochangeittofathomsor
meters, press2nd-6.Theletters'ft' willbedisplayed
onthescreen,
showingthat
theX-3 isin thefeet mode. Whiletheletters"it"arestill
displayed,pressthe 6keyagain.Nowthe letters"ft"willdisappearand
the letters"fa" will appear.
Therangehaschanged tofathoms. Pressthe
6
keyagainand the displaywill showtheletter"M" and change
to
meters.Aftersixsecondstheletterswilldisappear. Tochange
therange
backtofeet, press2nd-6-6.Toseewhich range
modetheunitisin,
press2nd-6atanytimeand theletters ftfa,ormwillappearWhenthe
unitisturnedoff,andthen backon, itwill alwaysreturntofeet.
15 20
28 Figure18
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r71
FASTRAK FASTRAK J
TheFASTRAKcauses
theX-3todisplaythebottom, fish,trees,orother
echoesincluding
thebottomsignalwillbeconvertedintoshort,straight
horizontallines.Asthebottomorotherechoesmovesshallowordeeper,
the lineswill riseorfall accordingly.
Thisgivesquick,precisedepth
information
ata
glance.
Iftheauto
sensitivity,auto ranging,
anddigitalfunctionsare on, theywill
bedisabledwhentheFASTRAKmode isenabled.
TostarttheFASTRAKmode,press2nd-7.
ToexittheFASTRAK mode,press2nd-7again.
Theautosensitivity,autoranging,
and digitalfunctionswill still be offafter
theFASTRAKmode isturnedoft
iuuammm•iuu
ClearingtheDepthAlarm
Aquick method
toeraseorclearallfunctionsofthe
depthalarm canbe
done bypressing 2nd-C-SELECT. Thiserasesallalarmsettings
forthe
alarmthat iscurrently
inuse.For
example,
todisable boththe shallow
and deepsettings, press theSELECT keyuntiltheDEPTHALARM
annunciatorisdisplayed
in the bottomleftcorner ofthe
screen,then
press 2nd-U-SELECT
anditwillimmediately becleared.Theannunciator
willgooffshowing thatthe
alarmisnolonger in use.
The,
notekeyWturnsthe audibletone offoron.Whenthealarmsare
firstset, theaudibletoneisonwhichcanbeseenby
thenoteannuncia-
tor . atthebottomofthedisplay.
Toturntheaudibletoneoff, press the
notekeyonthe
keyboardonce.Toturnitbackon,pressthenote key
LILJaäain.
19 16
DEEP
ALARM—
SET —SE; p SHALLOW
ALARM—
SET a..
""WI:
92 AUTO.
DEPTHAIM,? RANGING
Figure12
92 AUTO.
DEPTHAIM1 RANGING
Figure13
FISH
eorroM
Figure17
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19
LIGHT
LIGHT
AlightisprovidedforoperationoftheX-3 atnight.
Whentheunitisfirst
turnedon, thelightswillflashfor6seconds.Press the 2nd-9keysand
thelights willstayon.Toturnthe
lightsoff, press
the2nd-9keys. The
lights
willalsogooffwhenthe X-3 isturnedoff.
DISCRIMINATION
Noiseisquite oftenthe biggestcomplaint
fishermenhaveabouttheir
sonarunits.Noise isanyundesiredsignaland itcanbecausedeitherby
anelectricaloracoustic source,oracombinationofthetwo.Inboth
cases,
thenoisecanproduceunwantedmarksonthedisplay.
DISCRIMINATION
OFF(O)
TheDiscriminationfeatureontheX-3processes
allincomingechoes
fromthereceiver, determineswhichonesarenoiseand eliminates
them,
thendisplaysonlythelegitimate
echoes.Discrimination
hastwo levels—
1, and 2.0is"off",2isthe
highestsetting. WhentheX-3isturnedon, the
Discriminationlevelisautomatically
setto1.Ifnoiseispresent onthe
display,pressthelevel
ofDiscrimination
desired,
(0,I,and 2) thenthe
DISC key.Thereshouldbeanimmediate
change in theamountofnoise
displayed.
ADVANCED OPERATION
14)
HIGHSPEED SCROLL HI
Ifthere ismuchnoiseonthescreen,
orwhentravelling athighspeeds,
the
HighSpeed
Scrollmodemaybeeffectiveinshowingtargets
such
as
fish.Whenthisfeatureisturnedon,alltargets
(including
thebottomsig-
nal)will bescrolledextremely
fastacrossthescreen.Noisewillstill be
displayed
assingledots, howevertrue
targetechoessuchasfish willbe
displayed
asverylonglinesthatwillstretchoutacrossthescreen.This
separates
the
fish fromthenoise.
Randomdotsare noise. Fishare long
linesthatmayormaynotarch.
ToturnonHIGH SPEED SCROLL,press2nd-4.
Toturn offHIGH SPEEDSCROLL, press2nd-4
again.
Itisimportant tonotewhentheHIGHSPEEDSCROLL isenabled, auto
sensitivity, autoranging,
andthedigital(including the digitalalarm)will be
turnedoff. WhentheHIGHSPEEDSCROLL
isturned
off,thesefunctions
will still beoff.
17 18
24———
•
...
- r1
'F—
DISCRIMINATION
LEVEL
Figure14
innimuu n
LI
iiiii•iHii
AUTO.
•,•• ri'
:4"-: •.-.. -r
!i•ir.I:
;;:!C:.1
:ç
AUTO.
RANG!NO
Figure15 Figure16
HIGHSPEED
SCROLL HIGH SPEED SCROLL
OFF ON
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