Lowrance X-4 Operation User manual

Lithoin U.S.A. 988-0105-21
INSTALLATION AND OPERATION MANUAL
X-4 N
LCG RECORDER
•LOWRANCE ELECTRONICS, INC.
12OOO E. SKELLYDR.,TULSA,OKLA.74128
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TABLE OFCONTENTS
Introduction 2
Installation 2
PowerConnections 3
Noise 4
KeyboardBasics 5
Operation 7
On 7
Off 7
2nd 7
Clear a
Auto 8
Sensitivity 8
AutomaticSensitivity Advanced 10
ChartSpeed io
Range ii
LowerLimit i2
UpperLimit 13
Scale 14
Auto Range withZoomBottomTrack 15
Digital 15
10th 17
Alarms 17
ZoneAlarm 18
NoteKey 20
ClearingZoneAlarm 20
DepthAlarm 20
Discrimination 22
Light 23
Surface
ClarityControl(SCC) 23
Feet-Fathoms-Meters 24
Transducersand ConeAngles 25
SignalInterpretation 26
FishSignals 27
WaterTemperature and
Thermoclines 29
BaitFish 30
Surveying
aLake 30
HowtoObtainService 31
HowtoObtainaSchematic 31
Specifications 32
1
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COMMAND SUMMARY INTRODUCTION
1.DIGITALON/OFF DIGITAL Welcometothe
world
ofsportfishing sonar.
YourLowranceX-4 isa
2.DIGITALNUMBERSSIZE 2nd,7 high qualitysonardesignedforbothprofessionaland novice users.
The
3.DIGITAL—TENTHS 2nd,DIGITAL X-4 automatically
findsand displaysthe bottomdepth,fish,and structure
4.AUTOMATIC FUNCTIONS AUTO byjustturningiton.Asyougrow familiarwith your
X-4,youcan trysome
ofitsremarkablefeaturesand 'finetune"the unittothe
surrounding
ON/OFF conditions.
5.SCC 0-10,SCC
6.VIEWSCCWITHOUT SCC You canprogramtheX-4todisplay
thebottomdepth in tenthsofa
CHANGING foot soundalarms
whentheboatgoesshallower or deeperthan a
presetdepth,orwhenafish entersanalarmzone...plusmuch more.
7.CLEAR ENTRY CLEAR
8.FREEZECHART STOP/RESUME Toget startedwith yourX-4,
firstreadtheinstallationsection.
Thisis
where itall begins, and improperinstallationcancause problems
down
9.RESTARTCHART STOP/RESUME theroad.Afteryou'vereadthese instructionsand installed
yourX-4, read
10.DISCRIMINATION 0-5,DISC therestofthis manualin detail.Themoreyouknow whenyouget
tothe
water,
themore
yourX-4willdoforyou.
Takethis manual, oratleastthe
11.AUTORANGING WITH WINDOW
SIZE,2nd,8 User'sCard,
whenyouheadtothelake.
ZOOMBOTTOMTRACK
12. INCREASESENSITM1Y PRESS>KEY -
13. DECREASEgENSITIVI1Y PRESS<KEY
14. INCREASECHARTSPEED PRESSFAST KEY
15. DECREASECHARTSPEED PRESSSLOW
KEY
16.VIEWCHARTSPEED 2nd, SLOWorFAST
WITHOUTCHANGING
17.TURNLIGHTSONorOFF 2nd, AUTO INSTALLATION
18. FEET-FATHOMS-METERS 2nd,9 Mounting
19.ZONEALARMSET SHALLOWSET.or
DEEP SET,UP ARROW
or TheX-4 canbeinstalledin anyconvenient
location,providedthereis
DOWN
ARROWtoadjustdepth clearance
whentiltedforthebestviewingangle.Holesinthebracket
baseallowwoodscrew orthrough boltmounting.
Thebracketcan
be
20. DEPTH ALARMSET SHALLOW
ALARM,depth attached toaluminum
panelswith sheetmetalscrews.However,
we
DEEPALARM,depth suggestplacingapieceofplywoodonthebackofthinfiberglasspanels
21. CLEAR ZONEALARM CLEAR,SHALLOWSET
orDEEPSET tosecurethe
mountinghardware.Makecertainthereisenoughroom
behindthe unittoattachthe
powerandtransducer cables.
22. CLEAR DEPTHALARM CLEAR,SHALLOW
ALARM
CLEAR,DEEPALARM Ai/il'hole in the baseofthe
gimbalbracketallowsthe
power and
23. TURN ALARMTONE ON/OFF NOTE KEY transducercablestoberoutedstraight
down
throughthemounting
surface.
Thesmallestholethatwillpassone connector throughis¾".
Thiswillallowthetransducerconnectorand cable
tobepassedup
throughtheholeandgimbalbracket thenthe
power
cablewire canbe
pusheddownthroughthebracketand dash.Afterthecables havebeen
routed,thehole may
befilled withsilicone rubberadhesive(RTV),
orthe
bracketcanbeoffsetsothatthe
majorityoftheholeiscovered.
33 2
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Power Connections
The
X-4operatesfroma12volt batterysystem. Thepowercablecan
beattachedtoanaccessoryorpower buss, butifyouhaveproblems
withelectrical interference
(random
dotsor linesthatshowwheneverthe
boat's engineoranaccessoryison),thenattachthe cable directlytothe
battery.
Thepowercablehastwo wires,red isthepositive leadandblack is
negativeorground.Anin-linefuseholder containing
a3amp
fuseis
suppliedwiththeX-4.This attachestotheredwireonthe powercable
withthecrimp connector.Theotherend ofthe
fuseholderattachesto
thebattery oraccessorybuss. Ifthecableisnot
longenough,splice
ordinary#18gaugewire ontoitBecertainthatthe
fuse holder isas
closetothe
power source(battery or accessorybuss)
as
possible.
This
protectsthepowercable andyour
X-4in the eventofashort.TheX-4is
protectedfromaccidentalpolarityreversalsandwillnotbeharmedifthe
wires are reversed.
(However, theunitwillnotworkuntilthecorrect
polarityisapplied.)
SPECIFICATIONS
Dimensions
Weight
Transmitter
OutputPower
Receiver
Sensitivity
Operating
Current
OperatingVoltage
Numberofpixels
DepthCapability
Display
ScrollSpeed
6'/a"Hx8½"Wx3¾"D
2.5 pounds
192 kHz
600wattspeaktopeaktypical
75waftsRMS
> 85dbtemperature
stabilized
200 ma(lightsofO
500ma(lightson)
9-15vdc
82x32
2624Total
300'-SOO'
typical
(with20degreetransducer)
500'-700' typical
(with8 degreetransducer)
.5"perminute(minimum)
32"per minute(maximum)
— SIDE
OF DATTER Figure1
SPLICE
FUSE BOWER
BOAI
BMTERN
3 32
POWER CPBLL
1-Ia'J
•
CROUMO
OR
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Asyougoaboutyour
survey,your X-4 will tellyou
the
depthand kind
ofbottom. Itwillalsorevealsuspended
fish.Multiplesignalsonthedial
usuallyindicateagood school offish and it'sworth ittostop andfishfor
them.Youmaynot
getanyfurther.
Keep
afew LowranceFish-N-Floatsin the boat,readytotoss
overboard.
WhentheX-4indicates
aschooloffish,throwthebuoyout.
The
stringwillunwind untilthesinkerhitsbottom. Then, becauseofthe
marker'sflat
shape,itwon'tunwindanyfurther.Withthe
school thus
marked,youcanmake yourturnand comebacktofish in exactlythe
rightspotThis isessential whenyou're
farfrom shore onabiglake.
Unless
youmarktheschool offishwhen you'reoverit,youmaynot be
abletofinditagain.
HOWTO OBTAIN SERVICE
Ifyouhavea
problem
with
your sonarunit pleasegiveusachanceto
helpbefore sendingitinforrepair. Assistancecanoftenbeextendedby
telephoneorletter.WriteorcalloneofourAuthorizedService
Centersor
theLowrance
CustomerService
Department
inTulsa,OK.
IfyouliveoutofthestateofOklahoma,
call1-800-331-3889,
free.If
'youlive in the stateofOklahoma,
callcollect918-437-6881.
Please
detailthe
problemyou
are experiencing.
OurServiceDepart-
mentmaybeabletosaveyoutheinconvenienceofreturningyour unit.
Ifit'sdetermined
yourunitmustbereturned,
we'llprovidefull ship-
pinginstructions.
SCHEMATICDIAGRAMAND PARTS LIST
Shouldyoudesireaschematicandpartslistfor your
Lowrancesonar,
send$1.00 totheaddress
belowand the information
willbe mailedto
youpromptly. Besuretoinclude the modeland serial numberofyour
Lowrancesonar unit.
Mailto: Lowrance Customer Service
12000 E.Skelly
Drive
Tulsa, Oklahoma 74128-2486
TRANSDUCER
Installation
instructionsforthetransduceraresuppliedwiththe
transducerin aseparatepackage.
Pleasereadtheinstructions
carefully
before
youstartinstalling
thetransducer.
NOISE
Electricalnoisepicked upbythe powercable canbeminimized by
routing
itaway fromother possible
sourcesofelectrical interference.One
ofthe
largestnoisegeneratorsisthe
engine'swiring harnessthat runs
fromthe
enginetotheinstrument
panel.Thisharness
usuallycontainsa
wireforthetachometer
whichradiatesHF (radiofrequency)energy.
For
bestresults, keepthe power andtransducercables awayfromthe
engine
wiring.
Also,bilgepump wiring cansometimes
radiate noisesotryto
keepthe X-4's cablesawayfromthosewires.
VHFradioantennacablesradiateHFenergy
athigher powerlevels
than even theengine's
wiring harness.Itisvery important
tokeepthe
X-4's
powerand transducercablesasfarawayaspossible
fromaVHF
radioantennacable.
Ifthere isnonoise—interference—On
theunit
whentheboat issitting
stillwiththe
enginerunningin neutral,
but
interferencebegins atslow
boatspeeds, worsening
astheboat
speedincreases,
thena
probable
cause isacousticnoise,orcavitation.This
noiseisnot
electrical,but
rathermechanically
inducednoisefrom thetransducer.
Usually, acoustic
noiseiscreatedby airbubblespassing
overthefaceofthetransducer
Thefasteraboattravels,
themoreairbubblesincreaseandgenerate
noiseonthe
display.
Toeliminatethis problem,
readthetransducer
owner'smanualforpropermountingtechniques.
31 4
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KEYBOARDBASICS
SENSITIVITY These
keys
controlthegraph'ssensitivity.
(rhedigital'ssensitivityis
automaticallyadjusted.)
The
receiversensitivity has 32
speeds
which allows
adjust-
rnentoverawiderangeof
conditions.Theleftarrow
key
decreasesthesensitivity, the
right
arrow
key
increasesit
ZONEALARM KEYS This —.._....,
groupof keyscontrols theX-4's
zone alann.Itcan beused as
a
'fishalarm' with upperand
lowerlimitssetsothata
target
(suchasafishorschool of
fish)
willsetoffthealarm ifthe
target
entersthealarmzone.
0-9 Thesekeys allowthe
entry
ofnumbers0through9.
Someofthesekeys havemore
thanoneftJnctionandcan be
accessedbyusing the2nd
fijnclion key. When anumeric
key
ispressed, thenumberwill
bedisplayed inawindow near
the
topcenterofthe display.
CLEAR TheCLE14JR key"
erasesthelast
enby.Itcanalso
eraseother features, as
you
will
see
2nd 2nd allows someot
the
keystohavemorethanone
tunction.Noticethatsomeof
the
keys haveasmall word
printedinwhitebelow the
key's
primaryftmnctionlabel.For
example,
theAUTOkey also
hastheword LIGHT printed
onit."UGHr'istheAUTO
key's
secondfunction.The"2nd
Function"keysareactivated
by
first
pressingthe'2nd keyand
thentheappropriatekey which
hasthesecondtunotionprinted
inwhite.
11 kIIit'll1'
SCC
I°' acn:I•
STOP FAST ]
RESUME
1 2 3
7
SIZE 8 BTMTRIC 9
FT/PAlM
UPPER
LIMIT U LOWER
LIMIT
'I
OFF ON These keysturn
theX-4onandott.Toturnit
on,
simplypresstheONkey.
Toturn
it
off,pressandHOWtheOFF
key.
YoumustholdtheOFF
key
downforafewsecondsin
order fortheX-4toturnoff.
You'llnotice abeepevery
timea
keyis pressed.
Thisis
the
X-4's
way of tellingyouthat
ithas acceptedacommand.
Mostfish don'tspawnUnlessthewatertemperature
iswithinrather
narrowlimits. Tofindthedifferent
temperatures,
asurface
temperature
meter,suchastheLDT-3000 isavaluableaidtoyour boat.Thisunit
provides
anextremelyquickresponse toidentifying
thedesiredsurface
waterspawningtemperatures forvariousspecies.
Troutcan'tsurvivein
streamsthat
gettoo
warm;bassand other fish eventually dieoutwhen
stocked in lakesthatremaintoocold duringthesummer.While some
fish haveawider
temperature
tolerancethan others,
each hasacertain
range
withinwhichittriestostay. Schoolingfish suspended
over
deep
waterlieatthe level
that
provides
this temperature
in which,we assume,
theyarethe
mostcomfortable,
BAITFISH
Theimportance ofbaitfish tosuccessful
fishingcan'tbeover-
emphasiZed. Theyarethe
principlefood ofallgamefish in mostwaters.
Bait
fisharethe
planktonfeedingforagefish,suchasminnowsand
shad.Baitfish canalsobethe
youngofgamefish,
suchas
crappies,
bluegill,
and bass.
Most baitfish areconcentratedwithinfivefeetofthesurfacewhere
sunlightpromotes
the
growthofthe
planktononwhich theyfeed.One
methodoffishingistousetheX-4tofindthebaitfishfirst.Aschoolof
baitfish willlooklike
a"cloud" ontheX-4'sdisplay.Usually, game
fish
willbenearby, oftendirectlybeneaththe schoolofbaitfish.
SURVEYING ALAKE
Themost
successful
anglers
onany lakeor reservoirarethosewho
fish itdayafterdayandyear
after
year
until
theylearnthe
hot
spots
that
producefish consistently. Theydiscoverthrough experiencewhere,and
atwhat
depth,theycanexpect
tofindthekindoffishthey wantat
any
season.And theyrealizethat
theseproductiveareaschangethroughout
the
yeardepending
onwater level, temperature,food,and other
factors.
Withtheaidofthe
X-4,anyone caneliminate
guessworkand
concentrate.ontheareaswherefish are likelytobe-evenifitsthefirst
timeonthelake!
Themostefficent
way tobecome aquainted
withabody ofwateristo
survey
itwithyour X-4.
Startoutwith a
mapofthe lake,ifpossible, and
indicatethe
promisingspots in relationtolandmarksonshore.
5 30
_.]fC1IVjt!.]y'
IDIGITAL ISHALLOWI DEE1
10TH I ALARM ALARM J
SET
DEEP DISPLAY
J [DISC J
4 5 6
4CLEARJJ2N]IAuió
LIGHT J
,4-óFfl[ON]
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WATERTEMPERATURE ANDTHERMOCLINES
Watertemperature hasan important—if not
controlling—influence
upontheactivitiesofallfish.Fishare coldbloodedandtheirbodies are
always
thetemperature ofthe
surrounding
water. During the
winter,
colderwaterslowsdown theirmetabolism sothatthey needabouta
fourth asmuchfood as
they
consumeinthesummer
The
temperature
ofwaterin the lakeisseldomconstantfrom top to
bottom. Layers ofdifferent
temperaturesform, andthe junction ofawarm
andcool layerofwateriscalledathermocline.Thedepthandthickness
ofthe-thermoclinecan
varywith theseasonortime ofday.Indeeplakes
there maybetwoormoreatdifferentdepths. Thermochnesare important
tofishermenbecause
they
areareaswherefishare active.Many times
baitfishwillbeabovethethermocline
while
largergamefish will
suspendin orjust belowit.
Figure
23
._—THERM0cuNE
S/rnulated
Picture
TheX-4 candetectthis invisible
layerinthe
water,
butthe
sensitivity
willprobably havetobeturneduptoseeit
scc ThisIstheSurface
clarity
Controlorscc.Thescc
keyeliminatessurfaceclutter
(noise)caused bywaveaction,
algae,schools ot baitfish,or
othertactorscreatingnoise
near thesurface,
CHART Thechart
speed
is
controlledby theCHART
group
of
keys.TheX-4has 32chart
speeds,rangingtrom
very slow
toFAST
PressingtheFAST
key
speedsup
thechartspeed.
The
slow
key
reduces itThe
chart
displaycan be
stoppedand
startedagain using the
STOP/RESUME
key.
DIGITALSONARKEYS The
X-4isactually
twosonarsin
one.Thefirstandmostobvious
sonarfljnction,isthe
graph
whichshowsallreturnechoes
including
fish,bottom,therrno-
dines,etc.Thesecond sonar is
a
digital readoutdesignedfor
onlyone purpose:
toshow the
bottomdepth.The
digitalsonar
won't
give
talse
signalsfrom
fish,showthermoclines,or
any
othertarget The
keyssur-
roundedby thebarlabled
"DIGITAL
SONAR"turnsthe
digitalsonarofforon,andsets
thedigital'salarm functions.
DISC Discriminationisan
adjustable
noiserejection
system. Thelevelsof
adjustuient
are0through5.
AUTO TheAUTO key
switchestheX-4inoroutotthe
automaticmode,When theX-4
isfirstturnedon, it
automatically
adjuststhe
sensitivityend range
selection,
andtheword"AUTO"
willbe
displayed
nearthetop of
thescreen.Bypressingthe
AUTOkey,you cantake conbol
oftheX-4,making manual
adjushnents
asdesired.When
theX-4isintheautomatic
mode,theword"AUTO"willbe
displayed
near the
topofthe
display.
29 6
—H.
UPPER LOWER
LIMIT LIMIT The
Upper
andLowerUmit keysallowyou
toselect differentdepth ranges
bypressingthedesireddepth
andthen
pressingtheappro-
.pdate
upperorlowerUmit key.
The
UpperLimitkeysetsthe
depthtor
the
topotthedisplay,
whiletheLowerLimitdeter-
minesthe
depth displayed
at
thebottom.
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C}PFRATICThJ Remember, there mustbesomemovementbetweentheboatandthe
WhentheX-4isfirstturnedon, itautomatically findsand displays.the
bottomdepth,setsthe
sensitivity
level,
and muchmore.Ifdesired, theX-4
canbeleftin thisautomaticmodeand usedforfindingfish andthe water
and bottomconditionstheyprefer. However,
virtuallyevery
functionofthe
X-4 can bemanuallyadjusted sothat"finetuning" oftheunittoThe
surroundingconditionscanbemade.At
first,youshouldtakethis manual
outonthewaterasareference
guide.Asyoubecomemorefamilarwith
yourX-4,thehandyUser'sGuidewe'veenclosedshould beadequate
referencematerial.
ON EON]
TheONkey islocatedinthelower
rightcornerofthe keyboard. Itis
placed in this locationsothat itcanbeeasilyfound—evenatnight.
To
turntheX-4 on,presstheON key.Anaudiblebeepwill beheard
signifying
theX-4knowsthatakeyhasbeenpressed. Thechartlights
willbeginflashing, thenstop aftersixseconds.Thechartwill begin
scrollingacrossthedisplay
and thenumber"0"willflash.Thisnumberis
the
digital bottomdepthdisplay
Afterthe unithasfoundthe
bottom, the
depthwillbedisplayed.
OFF [ OFF]
ToturntheX-4off,pressand HOLD theOFF keyuntil thedisplayis
erased.
2nd
The
X-4has
many
differentfunctions, but
onlyalimitedamountof
spaceforkeys.Therefore,
someofthekeyshavemorethan onefunction.
Eachkey'sprimaryfunction isprintedin onecolor,whileit'ssecond
functionisprintedinwhite.The"2nd"keymustbepushed toaccessthe
secondfunctionprintedinwhite on the
appropriatekey.
Forexample, theAUTO
keyisalso labeled"LIGHT". If youpress
the
AUTO keybyitself, theX-4willbetakenout oftheautomaticmode.
However,
ifyoupress the2nd key,then theAUTO
key, theX-4'slights
willbeturned on.The2nd keylustreassigned themeaning oftheAUTO
keyfromAUTOtoUGHT.
fishtodevelopthearch.Usually this means
trollingat veryslowspeeds
with themainengineingear
ataminimumthrottlesetting.
Thedepthofthe waterwillaffectthesizeand
shapeofthefish arch
duetothecone angle diameter. For
example,
ifthe cone passes overa
fish in shallow
water,the signaldisplayedontheX-4maynotarchatall,
duetothenarrow conediameter and the resolutionlimitationsofthe
display.
Eventhe20degreetransducerhasonlya3footdiameteratthis
depth.
Compared
toa
papergraph,
anX-4cannot showasfine ofdetail
becausethepixels(dotsonthescreen) are muchlargerthanapaper
graph'smarkings.Therefore,
the
X-4cannotshowfish archesaswellas
agraph,and itrequires abitmoreworkinitially toreadand interpret
the
screenthana
papergraph.
Very
smallfish probably will notarch atall, while mediumsizedfishwill
showa
partialarch,orashapesimilartoanarch ifthey'rein deepwater.
Large
fish will arch,butthe
sensitivity
needstobeturnedupindeeper
watertoseethearch.Becauseofwater conditions, suchasheavy
surfaceclutter, therniociines,etc., the
sensitivity
sometimescannotbe
turned highenough
toget fish arches.
Oneofthebestwaystogetfish arches istoexpandor"zoom"a
segment
ofthe
water,
forexample 40to60feetThesmallerthe segment
thebetterthescreenresolutionwill be.Then,
turnupthe
sensitivity
as
highaspossible
withoutgettingtoo
much noiseon thescreen.In
mediumtodeepwater, thismethodshouldworktodisplayfisharches.
Simulated
Pictures
Figure22
7 28
______ U______
In
jrt
LU
I' a
II
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FISHSIGNALS
The
signalsdisplayedontheX-4by
fish canbeidentifiedby various
shapedmarkings
in certainpatterns, asopposed torandommarks
created
bynoise, orthe solid,
continuous
markings
madeby thebottom.
Individualfish can,attimes,bedistinguishedby
acharacteristicarch that
separates
themfromtheir
stationarysurroundings.
Thereasonforthisis
shownbelow.Thedistancetoafishwhen itmovesintothesonar'scone
ofsoundisshownas"A"Figure
21.Whenthefish hasmovedintothe
centerofthecone, thedistancetoitwillbeshorter,"B",
and asitmoves
outofthe
cone,thedistancewill increase againasshown in "C".
Ifapartialarch occursmostofthetimeonyourunit
(themark curves
up, butnotbackdown,orvice-versa)
itcould bethetransducerisnot
pointedstraightdown.Ifthetransducerismountedonthetransom,
adjustituntil thefish showthedistinctivearch.This
maytakesometrial
and erroruntilthe correct mounting isachieved.
CLEAR [A]
Ifyoumakeamistake,
andpressakeyotherthanwhat
youwanted,
waitsixsecondsandtheX-4willautomatically
erasethe
entry. For
example, if you
wish
toturnonthe lights, the
properkeystopressare
2nd,
AUTO.
However, ifthe0
keywas
accidentallypressedinsteadofthe
2nd key,youcan
presstheCLEAR key which erases the0and allows
youtostartover.
TheCLEAR key alsoerasesorsetstozero otherfunctionsoftheX-4
including
5CC,Discrimination,
and UpperLimit.Astheotherfunctionsare
describedin this manual, theCLEAR key'soperation
willexplainedin
detail.
F AUTO 1
AUTO t LIGHJ
Whenthe
X-4isfirstturned on,theautomaticmodeison.To switch it
intothe manual mode,press
theAUTO
keywhichislocatedabovethe
ON key.ThewordAUTOatthe
topofthe displaywillbeerased,
auto
sensitivity
and auto ranging willboth be cancelledandyou will have
complete
manualcontroloftheX-4.TheX-4canbe returnedtothe
automatic
modeat
any
timebysimplypressing theAUTOkeyagain.
I1F1IlL'il1'
SENSITIVITY [*" scc [i"..' I
Whenfirstturnedon, theX-4isin theAUTOSEARCH mode.This
means
the
sensitivity
and rangeareautomatically
adjustedby
themicro-
computer
tofindand lock ontothebottom.Thesensitivity
canbeleftin
theautomaticmodeoritcanbemanuallyadjustedtosuitconditions.
The
sensitivity
levelisdisplayedby ahorizontal
baratthetop ofthe
display. Whenthe sensitivity
isatminimum,
thebar isveryshortAs
sensitivity
isincreased, thebarwilltraveltotheright,increasingin length
correspondingly.
Whenthesensitivity
isset tomaximum, thebarwill
extendacrossthe
top
ofthedisplay.
SENSITIVITY
BAR -.r
rINUIIH AUTO.
AUTO n .. Figure
2
ANNUNCIATOR b'IiChi u
27 8
I'll"
Figure
21
A.rI.c
Simulated
Picture
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Tomanuallyadjustthe sensitivity, press theAUTOkeyonce, and auto
sensitivity
willbeturnedoff.ThewordAUTOatthe
topofthe displaywill
disappear,sigAifying thattheX-4isinthemanualmode.Toincreasethe
sensitivity, pressand hold the right arrowkeyuntilthe sensitivity
isatthe
desired level.Theleftarrow decreasessensitivity inthesamemanner.
Noticehowthe
sensitivity
barmovesasyouchangesettings. Whenyou
pressthe rightarrowkey,
thebarmovestotherightindicating an
increasein
sensitivity. Pressing
theleftarrow key movesthebartothe
left,indicatingthe sensitivity
hasdecreased
accordingly.
You'llalsosee
the
change onthe
display.
Figure3demonstratesagraphwithtoolittlesensitivity, whileonthe
rightthesensitivity
isadjustedproperly; afish isnow
visible,
thesurface
clutter ismorepronounced, and thebottomsignalhaswidened.
Figure
3
Simulated Picture
Figure4
SENSITIVITY
AWUSTED
PROPERLY
Simulated Picture
The20degreetransducerisalmost
alwaysthebesttouse in fresh
water, whilethe8degree
transducerisusedmostly in saltwaterIn a
deepwaterenvironment(300
feet—fresh
water,100feet—salt
water)
the
narrow coneangleismore desireablebecauseitcanpenetrate tomuch
deeperdepthssincethesoundenergy
isconcentratedin asmallerarea.
Both8
degreeand20degree
transducersgiveaccuratebottom
readings,
eventhough thebottom
signalismuchwideronthe20degree
modelbecause
you
areseeingmoreofthebottom. Remember, the
shallowedgeofthesignalshows
youthe
true
depth.
Therestofthe
signaltells youwhether youareover rocks,mud,etc.
Transducers
onsaltwaterboatsneedtobepaintedwith athincoatof
anti-foulantpaint topreventorganisms fromgrowing.Ifunchecked,
barnaclesand othermarine
growthwillcauseadecreasein the
transducer'ssensitivity. Do notuseametalbasedanti-foulant
paintas
it
will decreasethetransducer'ssenstivity.Therearespecialanti-foulant
paintsspecificallydesigned
fortransducers.
They'rereadilyavailable at
mostmarinedealers.
SIGNAL INTERPRETATION
Because
yourX-4isboth extremely
sensitiveandpowerful,it can give
youanaccuratepictureofthekind ofbottomoverwhich yourboatis
passing. Abottomoffirmsand, gravel,
shell,or hardclay returnsafairly
wide signal.Iftheautomatic
sensitivity
istumed off, andthe
signal
narrowsdown,thenitmeansthat
youhavemovedoveramudbottom
becausemudabsorbsthesoundwaveand retumsaweaksignal. Turn
upthe sensitivity. If you havetheautomatic senstivity
turnedon,watchthe
sensitivity
bar.Astheboatpasses
overthe mudbottom,
the
X-4 will
automatically
increasethesensitivity tomaintaina
goodbottomsignal.
The
sensitivity
barwillhelpyouin determining
if
thebottomissoftor
hard.Ifitincreaseswhile inthesamedepthofwater, thentheboathas
movedover asoftbottom.
If itdecreases, then itisoverahardbottom. Of
course,as
thewaterdepthincreasesor
decreases,
thesensitivity will
also change.
Big rocksorstumps
onasmoothbottomsendbacksignals abovethe
bottomlevelsignal. Theheightofthe signaldependsonthe target's
height. Ifyou
watchas
youapproacha post
oratreestump, it will be
clearlyvisibleasashortlineextending
abovethebottomsignal.
9 26
—SENSITIVITY
AU
TO.
0——— —
SEtIS,Ti:TY
-
TOOLITrLE
SENSITIVITY
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TRANSDUCERS AND CONEANGLES
Thesoundwavesfromthetransducer
spreadoutintothewater in a
cone shapedbeam, much likethebeamfromaflashlight Theangle
betweentheoutsideedgesofthecone iscalledtheconeangle.
Lowranceoffersachoice oftransducerswith eitheran 8or20degree
coneanglethat will interchange with anyofthe 192kHzsonarproducts.
Inotherwords,any Lowrancesonarinstrumentcanbe usedwith any
Lowrancetransducerofthesame
frequency
with noloss ofperformance.
However, theuseofanyothermanufacturers'transducerwillresultin a
lossofperformance.
Generally,
wideconeangletransducers
(20degrees) are ideally
suited
foroperatingin shallowtomediumwaterdepths. The20degreecone
angleallowsyou
toseemore oftheunderwaterworld. In 15 feetofwater
the20degreecone coversanarea aboutsixfeetacross.The8degree
transducercovers
onlyaboutatwo foot
circle.
50'
100'
150'
200'
8°at3db
Whenthehorizontalbarreachesthefar right handsideofthe
screen,
the
sensitivity
level isatmaximum. Ifhigh sensitivitysettings are used,
a
secondbottomecho
mayappear.
This
isnormal and iscausedbythe
returningsignalreflecting
offthesurface ofthe
water,makingasecond
trip
tothe bottomand back
again.
Thisiscalled"second echo".
ToturnAutoSensitivity backon, presstheAUTOkey. Remember, both
automatic
sensitivity
controland autoranging functionsareturnedoff
and onatanytimebypressing theAUTO
key.Thetwo controls cannot
beturnedofforonseparatelybypressingtheAUTOkey.
AUTO SENSITIVITYADVANCEDOPERATION
Whenthe X-4 isin theautomatic
mode,
the
sensitivity
ofthereceiver
willbeadjusted toten stepsabovetheminimum
requiredtopickupthe
bottomsignal.(There are 32stepsofsensitivityavailable.)
The
sensitivity
levelcan bechangedwhiletheX-4isin theautomatic
mode.This
maybedesirableifthelevel ofsensitivity
chosenbythe
X-4
isnot
enough
toshowfish orothersmalldetail. Once
thesensitivity has
beenchanged, theX-4willincreasethe
sensitivityenough
topickupthe
bottomsignal, thenadd in thelevel youprogrammed.
Ifdesired,any
amountofsensitivityuptothemaximum
maybeadded.
coneAngle
Diameter
8' 20'
7ff. 18ff.
14 35•
21 53
28 71
pth
50
1100
1150
Figure20
Toadjust thesensitivity whiletheX-4isinthe
automaticmode,simply
press
eitherthe rightarrow key> toincreasethe
sensitivity
ortheleft
arrowkey<to decreaseitIfthe
sensitivity
isdecreasedtominimum,
the
X-4'saudibletonewill"flutter".Thesameistrueif
youtrytogo
abovethe
maximumlevel.Asyoupress thearrow key,the
sensitivity
barwillmove
rightorleft,accordingtotheamount
ofsensitivity chosen.
[SLOW RESuME FAST1
CHART
SPEED
WhentheX-4isturnedonforthefirst
time, thechartspeedscrollsat
a
pre-determinedspeed.Ifahigherspeedisdesired,pressand holdthe
FASTkeyin theCHARTsectionofthe keyboarduntilitrunsatthe
desiredspeed. To slowthedisplay,pressand hold theSLOW
key.
Whenevereitherofthese keysarepressed, the sensitivity
baratthe
top
ofthe
display
willchange toadashedlineand theletters"CHT"will
appearinawindownearthe topofthe display.
Thisbarrepresents
the
chartspeed. Ifyoupressand holdtheFAST keyforexample, thebar will
start
movingtotheright,signitying
thatthechart speedisincreasing.
25 10
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CHART -
SPEED —-
1111111 iuumUWU II
BAR
U Figure 5
Thereare 32stepsofchartspeed.Byholding eithertheFASTorSLOW
keys,
the
displaycanbespeededuporslowed down.Whenthe
horizontalbarreaches
thefar rightsideofthe
screen,
thechartspeedis
atitsmaximumvalue.TheX-4will"flutter"signifying themaximumchart
speed hasbeenreached.
Ifthe automaticmodeordigitalfunction ison,themaximumchart
speedcannotbereached.
(The
chart
barwillstop onestepfrom thefar
right
andtheaudibletonewill "flutter".)Turning
boththe digitaland the
automaticmode offwillallowthemaximumchart
speedtobeattained.
Toview
thechartspeedwithout
changingit,press2nd, FAST or2nd,
SLOW. Thesensitivity
barwilldisappear and thechartspeedbarwill
replace itforafewseconds.
At
timesitisdesirabletostopor"freeze"the
displaytoexaminean
echobeforeitscrollsoffthescreen.Pressing
the
STOP/RESUME key
oncewillfreezethe
display.
Whilethedisplayisstopped, the
toplineon
thedisplaywillflashonand offtosignify
thattheunitisinthefreeze
mode.Pressing
STOP/RESUME
again
willstartthe
displaymovingatthe
lastchart
speedsetting. If
thedigitalsonarison,thebottomdepthwill
continuetobedisplayedonthescreen.Thedigitaldoesnot
stopwhen
thechart isin the
"freeze"mode.
RANGE
WhentheX-4isintheautomatic
mode,theranges
willautomatically
changetokeepthebottomsignalonthe displayasthebottom
depth
changes.
At
times,however, itmaybedesirabletoexpand therangeor
zoom in onatarget.
Theupperlimitcanbesetfrom0to989feetandthe
lowerlimit canbesetfrom10to999feetAnycombinationofthetwo
limitsmaybeused,
providedthatthelower
limit isnocloserthanten feet
tothe
upper limit. Ifa
segment
lessthanten feet isentered,
theX-4will
"flutter"andtherange
willremainatthe
previoussetting.
8CChasten levelsofadjustment. Whenthe X-4 isfirstturnedon,the
SOC isautomatically settolevel 2.Tochange toadifferentlevel, simply
pressanumber keyfrom0to10, thenpress
theSOCkey.
ToviewtheSOC level, simplypress the5CCkey.
ToturnSCCoff, press0,5CC orCLEAR,SCC.
FEET-FATHOMS-METERS
9
FT/FA/M
TheX-4candisplay thedepthin eitherfeet,fathoms, ormeters. When
itisfirstturnedon,the
displayreadsinfeetTochange ittofathomsor
meters, press2nd,
6.Theletters"FT' willbedisplayedonthe screen,
indicatingthattheX-4isinthefeetmode.While theletters"FT' are
displayed,press
the6keyagain. Nowtheletters"FT' willdisappear and
theletters"FA"willappear.Therange has
changedtofathoms. Press the
6
keyagainandthe displaywill showtheletter"M"and change
to
meters.Aftersixsecondsthe letterswilldisappearTo change therange
backtofeet,press2nd, 6,6.Toviewtherange modetheunitisin,press
2nd,6andtheletters
corresponding
totherange willappearWhenthe
unitisturnedoff,the
range
;everts backtofeet.
Simulated
Picture
Figure
19
11 24
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LIGHT F AUTO
LIGHT
Alight isprovided foroperation
oftheX-4atnight.Whentheunitis
firstturnedon, thelights
will flashfor6seconds.Press the
2nd,
AUTO
keysandthelights
willstay on.Toturnthe
lightsoff, pressthe
2nd,
AUTO
keysagain.
Thelights willalsogooutwhentheX-4istumeOff.
SURFACE CLARITYCONTROL rscc 1
Themarkings—or noise—atthetopofthe
displaycanattimesextend
many
feetbelowthesurface.Thiscaninterferewithfish signalsorother
targets.
Thesemarkings arecalledSurfaceClutterand arecausedby
waveaction,
boatwakes,baitfish,
temperature
inversions,
and other
reasons.
Thesurfacecluttercanbereducedoreliminated
byusingthe
Surfape
ClarityControlorSCC. SCCvariesthe gainofthereceiverbetweeneach
transmit
pulse,
whilethereceiveris"listening" forthereturnechoes.The
gainisthelowestforechoesnearthesurface.Itisgraduallyincreased
asthedepthincreases.Themaximum depththat5CCwillaffectisone-
halfofthe selecteddepthrange. For
example, ona0to60footrange,
SOCwould haveaneffectfromthesurfaceto30feet.
23
SURFACE
CLUUER
Simulated
Phture
Figure
18
LOWERLIMIT
Tochangethelower limit, firstmakecertaintheword"AUTO"isnot
displayed
atthe
top
ofthescreen,signifying
thatthe automaticmodeis
off. (Note: Thisalsodisables
theautomatic
sensitivityfunction.)
Ifthe
automaticmode ison,presstheAUTO keyonce
todisableit. Next,
press
thelower limit desiredfrom10to999feetand press
theLOWERLIMIT
key.The displaywillimmediatelychangetothenewdepthrangeand
displaytheflewlowerlimitatthebottomofthescreen.
For
example, tosetthe range
from0to70feet, press7,0,LOWER
LIMIT
UMIT
Simulated Picture
FISH
Figure
6
NOTE:
Althoughthemaximumlower limittheX-4candisplayis999
feet,the actual depth
thattheX-4can reachisdependentonwaterand
bottomconditions,plusthe
qualityofthe transducerinstallation.
ThelowerlimitcanbechangedeveniftheAutomaticfunctionison.
However,
theX-4won't
acceptanentryifalower limit isselectedthatis
lessthanthedepthofthebottom
whiletheX-4isintheAutomatic
mode.
For
example, iftheX-4isin Automatic,
andthe range is0
to75feet, with
abottomsignalat60feet, andyouselectalower limitof50feet,
theX-4
will"flutter" and leavethelower limitat75feet.
12
.1 IJ1
V
LOWER
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WhentheX-4changesranges
whileintheautomatic
mode, thelower
limit
selectedwillalways
beamultipleoften. Inother
wordsthelower
limitwillbeanumberthatends inzero suchasten,twenty,
forty,one
hundred,
etc.
UPPERLIMIT
Oftenit'sdesirabletoexpand or"ZOOM"asectionofthe
displayto
show moredetail.Youcando
this ontheX-4byusing theUpperLimit
feature.Tochangethe
upperlimitofthe
display,simplypressthedesired
depth(any
numberbetween0and 989feet)andthentheUPPER LIMIT
key.Theonlyrestriction9nthe
upper limitisthatit mustnotbecloser to
thelowerlimitthan10feet Inotherwords, ifthelowerlimit issetto81
feet theupperlimit
cannotbeset
any
closerthan71 feetAten foot
segment
orlarger isrequired.
Example: Settherange
from30to70feet
Press:
3,0,UPPER LIMIT, 7,0,LOWERLIMIT.
FISH
T
LOWER
LIMIT -J
DISCRIMINATION [ DISC J
Unwantednoiseonthedisplayisa
fairlycommon
complaint. Noise
canbedefinedasanyundesired
signaland itcanbecausedby
eitheran
electrical oracousticsource,
oracombinationofthetwo. Inbothcases,
thenoise canproduceunwantedmarksonthe
display.
TheX-4 has
Discriminationwhich iseffectivein combating noise
signals.
Itprocesses
allincomingechoesfromthe
receiver, determines
which ones arenoiseand eliminates
them,displaying
only
thelegitimate
echoes.Discrimination
hasthreelevels—0through 5.0isoff,5isthe
highestlevel.WhentheX-4isturned on,theDiscrimination level is
automatically
settolevel 1.11noiseispresent
onthe
display,press
the
levelofDiscrimination
desired,(0,1,2,3,4,or5)thentheDISCkey.
Thereshould beanimmediate
changein theamountofnoisedisplayed
onthe screen.
Discrimination
maybeturnedoffbypressing0,DISC orCLEAR, DISC.
ToviewtheDiscrimination
setting
without
changingitpress
the
DISCkey.
SimulatedPicture DIscRIMINAnoN1OFF"
-SENSWWTV___
- UPPER
— LIMrr
-
DISCRIMINATION "3"
Shiu!ated
Pickires
Figure
7
13 Figure
16 22 Figure
17
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To usetheShallowAlarm,press
thedesireddepth,thentheSHALLOW
ALARM
key. Forexample,
tosettheShallowAlarmto15feet,press1,5,
SHALLOWSET.Thenumbersoneandfivewillbedisplayedonthe
screenastheyareentered,
then
disappearNow,iftheboattravelsinto
watershallowerthanfifteenfeet theshallowalarmwillsound.
SknulatedPictures
Upperand lowerlimitsmaybe setin variouscombinationstoshow
segments
fromthesurfacetothebottomand anywhere
in between.This
permits
a
scaleexpansion
or"zoom"ofaportionofthedisplay. Ifaten
footsegment ischosen,thenthescreenresolutionis1½".Thismeans
thateach dotisequal
to1½incheswhenatenfoot
segment
ischosen.
TheDeep
Alarmcanbesetinthe samemanner. Pressthedesired
depth,
thentheDEEPALARM
key.Forexample, settheDeep
Alarmto50
feetbypressing5,0,DEEPSETThenumbers5and 0willbedisplayed
onthescreen asthey're
entered,
then disappear. Iftheboat movesinto
waterdeeperthan 50feet, thealarmwillsound.
Toviewthe
settings
ofeithertheshallowalarmorthe
deepalarm
without changing
them,press
theSHALLOW ALARMor DEEPALARM
keys.
TocleareithertheShalloworDeepAlarm, press0, SHALLOWALARM
or0,DEEPALARM
respectively. Thewords "DepthAlarm"willdisappear
fromthelowerleftcorner ofthe display, signifying both alarmshavebeen
turnedoftTheCLEAR keycanalsobeusedtoturnthealarmsoff.Simply
pressCLEAR,SHALLOWALARM orCLEAR, DEEPALARMtoturnthe
alarmsoff.
Note: BothShallowand Deep Alarmsmustbeoffforthewords
"DEPTHALARM"togooffin thedisplay.
Whenchangingthe upperorlower
limits,rememberthe minimum
distancebetweenthetwo istenfeet.Itadistancesmallerthantenfeet is
chosen,the X-4 will changetherange
toatenfpotseparation. For
example,
iftheupperlimitisO,withalower limitof10feet,andyou
changethelower limitto9feet,
theX-4will"flutter" andthe
previous
lowerlimit of10feetwillnotbechanged.
SCALE
Thereareten scalemarkersprintedonbothsidesoftheX-4's
displayto
helpdeterminewhatthe depthofa targetis. Forexample,
ifthe
depth
range
is0to60feet, then eachmarkisequal tosixfeet.Itthetarget
(such
asafish)wasnexttothe5th line, then itis30feet
deep(5 lines
timessixfeet=30
feet).Tomakeiteasiertousethe depthscale, use
ranges
in multiplesoften, i.e. 10, 30, 140,etc.
21 14
•
15
——SrNS'1W/II
/1)10.
Tt1 C SHALLOW
ALARM
-SET
TO15
FEET
DEEP
ALARM
SETTO
50
FEET
DEPTH
ALARM
"ON"
AUTO.
TC1
/7/' 0
UEP7WAtM)
Figure 15
tfl
— - ou
ptp
AtM
Figure14 SimulatedPicture
SCALE
MARKERS SCALE
MARKERS
Figure
8
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AUTO RANGEWITHZOOM BOTTOMTRACK
Even thoughthe
upperlimit can bechangedtozoominonatarget,
if
theX-4isintheautomaticmodethelowerlimitwill changeasthe
bottom
depth changes To maketheupperlimittrack
alongwith the lower
limit, coupletheAutoRange with ZoomBottomTrack function.
Touse
this feature,
azoomwindow mustbechosen.Forexample, lets
usea20footzoomwindow.This meansthattheX-4willkeepthe
upper
limitsetting20feetabovethelower limit
and place thebottom
signalin
thiswindow,trackingitasitmovesshallowerordeeper. Press
2,0,2nd,
8.TheX-4willchooseanupper
and lower
limitthatwillplacethebottom
signalin the 20footwindow.Thebottomwillbetracked andalwayskept
insidethiswindow.Ifthesegment
sizeis40feetorgreater, thebottom
willbetracked with window limitsendingin zero(10,20, 30, etc.),
otherwisethelimitswillbe in onefootincrements.
Theupperand lowerlimitscanbechangedwhiletheAutoRange with
Zoom BottomTrackmodeiscoupled;howeverthe
segment
sizewillstay
thesameinternally. Whenitautoranges thenexttime,itwill revertback
tothe
original segment
size. Forexample, ifawindow of30feetwas
chosenand the upperlimitpicked by theX-4was 20 feet withalower
limit offiftyfeet, andthenyouchanged the
upper limitto30feetwhen
thebottommovesoutofthe
window,thewindow
upper
and lowerlimits
willbechangedbacktoa
thirtyfootwindow.Use cautionwhen changing
theupperand lower limitswhiletheX-4isin theautomaticmode.You
cancause ittoautorange
thebottomsignaloffthescreen.
Toexitfromthisfunction,press2nd,8orpressthe AUTO keytoturn
offtheautomaticmode.
DIGITAL I 'eTIVS1.]ri;t
[DIGITAL SHALLOW DEEP
10TH ALARM ALARM
Acompletedigitalsonar isbuilt insidetheX-4. Itautomatically
discriminatesbetweenthevalidbottomechoesand falseechoesfrom
fish,thermoclines,
orothersignals. The
digitaldisplaywillshowonlythe
bottomdepth.Itcanbeusedanytime, regardless ofthemodetheX-4is
in.
NOTEKEY [cJ
Thenote
keyturnstheaudible
tone offand on. Whenthealarmisfirst
set,theaudibletoneisonanda"note"atthebottomofthescreenis
displayed.
Toturntheaudibletone off, press
thenote keyonthe
keyboardonce.Toturnitbackon, pressthenote keyagain.
CLEARINGTHEZONE
ALARM
ToturntheZoneAlarmoff, pressCLEAR,SHALLOWSETorDEEPSET
AlloftheZoneAlarmsettings will remainin memoryuntiltheX-4is
turnedoff. Pressing eithershallowordeepset
keys
willturntheZone
Alarmbackonwiththe
previoussettings.
DIGITAL_SONAR
AL SHALLOW DEEP
DEPTH ALARM 10TH ALARM ALARM J
The
Depth
Alarmisactually twoalarms.Theshallow alarm
givesa
warningwhen you'rein watershallowerthanthealarmset pointThe
deepalarmgives
a
warninginwater deeperthanthealarmset point.
The
bottomsignalistheonlyechothatwilltriggereithertheshallowalarmor
the
deepalarm.
Note:TheX-4 mustbein eithertheautomaticmodeorthe
digitalmust
beon in orderfortheDepth Alarmtofunction.
Bysetting
boththeshallowand deepalarms, awindowcanbe
positioned
betweenthe surfaceand thebottom.
Ifthe boatgoesinto
waterthatisshallowerthantheshallow alarm'sset
pointthealarm
will
sound.Thesamewill happen
ifthe boatgoes intowater
deeperthanthe
deepalarmset point
Thismakesausefulanchorwatch orwhen
navigatingthroughachannel.
15 20
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Toadjust theshallow(top)alarm, press theSHALLOWSET
key,then
pressthe uparrowkeytomovethetop
ofthealarmwindowup,orthe
downarrowkeytomovethe
topofthezonedeeper.
Thebottomofthe
zonecanbesetinthesamemanner
usingtheDEEPSETkey.Pressthe
DEEPSET key,thenpresseithertheuparrow keytomakethebottom
part
ofthewindow move
shallower,
orpress thedown
arrowkey tomove
thebottomofthewindowdeeper. Afterthe
keysarereleased,
thebarwill
remain onthescreenforsixseconds,andthendisappear.
IN.'.filL'I)V
ZONE ,I.
ALARM
BAR —— iPL,
Aslongasthe"ZONEALARM"signalisdisplayed, thealarm is
engaged.
If
you
wishtoviewthezonealarmbar, simplypresseitherthe
SHALLOW
SETorDEEP SET
keys andthebarwillbedisplayedforsix
seconds.Itcanbeturnedonpermanentlybypressing2nd, downarrow.
Totum itbackoff,simplypress2nd, down arrow again.
Ifthezonealarmissetoffby afish orthe
bottom, thealarmwillsound
andthewordsZONEALARMwill beseenatthebottomofthedisplay.
Iftherange ischanged, thezonealarmmayneedtobechanged since
itdoesnottrack rangesettings.
NOTE:Ifthe
digitalis
on,thechartbarmay interferewiththedigital
displaywhiletheshallowordeepalarmsarebeingadjusted.
Thedigital
displaywillretumtonormalafterthezonealarmadjustments
are
finished. -
WhentheX-4isfirstturnedon,the
digitalwillflash'0"until ithas
"locked on"tothebottom
signal.
Onceithas
acquiredthebottomdepth,
itwilldisplaythedepthin thelowerleftofthe
display.
Foreasierreading, thesize ofthe
digitalnumberscanbeenlargedby
pressing2nd,7.Toreturntothesmallersize,press2nd,7
again.
Althoughitisnotnecessary
innormaluse, toget themaximum
performance
outofyourdigitalsonar, stopthechart bypressingthe
STOP/RESUME
keyin thechartsection ofthe keyboard.
Thisturnsthe
X-4intoa
digitalsonar onlyandallows ittobettertrackthebottom
signal. Onereasontousethe digitalinthis mannerwould beif youare
goingtotravelathighspeedfromonepart
ofalaketo.anotherandyou
just
wanttoknowthebottomdepth.Press
STOP/RESUME, thenchange
thesizeofthe
digitaldisplaybypressing2nd, 7.This willgive boththe
fastest
possibledepthupdatesplusaneasy-to-readdisplay.
The
digitaldisplaycanbeturned offbypressing
theDIGITAL
keyin the
DIGITALSONAR
portionofthe keyboard
orbypressingCLEAR, DIGITAL
19 16
Figure9 Figure 10
ZONEAtM
SimulatedPture
ZONE
ALARM
"ON"
5fj Figure13
Simulated
Plcttyes
DIGITAL
BO1TOM
DEPTH
LARGE
DIGrrAL
BOTrOM
DEPTH
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10th
Thedigitalsonarwilldisplay thebottomdepth in whole numbers. If
desired,
thebottom
depthinwater lessthan 100feetcanbedisplayedin
tenthsofafoot
bypressing
2nd,DIGITAL.Ifthebottomdepthgoes
deeperthan 99.9
feet, thedigitalsonarwillautomaticallydisplayinwhole
numbers
again.
The
depthalarmalso hasupperand lower limits, buttheydonot have
tobeusedtogether. The
depthalarmsoundswith afastbeepwhenever
the bottomecho isdetectedshallowerthanthealarmupperlimit,anda
slow
beepwhenthebottomisdeeperthanthealarm'slowerlimit. The
word "ALARM"alsoflashesonthe
displaywheneverthe
depthalarm is
triggered.
BOT1DM
DEPTH
ATTHIS
POINTIS
18.9FEET
ZONEALARM L
TheZoneAlarmcanalso bethoughtofasafishalarm.Itwillsound
whenanechoisdetectedinsideitswindow.
TosettheZone
Alarm,press
theSHALLOWSET keyin theZONE
ALARMsectionofthekeyboard. ThewordsZONE ALARMwill be
displayedin thelowerleftcornerofthescreen.
Avertical barwillbe
displayedonthe leftside ofthescreen.ThisistheZoneAlarm's
"window".Any echothat
appears
betweenthe
top
and bottomofthisbar
willsoundthealarm. Boththeshallowand deependsofthisbar canbe
adjustedtomakeasmallerorlarger
alarm"window".
Simulated P/awe
17 18
ZONE ALARM
ISHALLOW
SET
DEEP
SET
Simulated Picture
Figure
11
Ifthechartisinthefreeze
mode,thedigitaldisplaywill continueto
show thebottomdepthasitchanges.Itdoesnotfreezewhenthechart
does.
ALARMS
TheX-4hastwodifferentalarms, azonealarmanda
depthalarm. The
zone alarmrequires bothanupperandalower limitsetting. Thealarm
then "chirps" andtheword "ALARM"flashesonthe
displaywhenever
an
echosuchasa
fish,
orschool offishisdetectedinsidetheboundaries
ofthe
upperandlowerlimits.
SL' IT)
UTY -
-
T -
ZONE ___..—tL. —
ALARM
BAR — - -
- gI L
2a,gALM
Figure
12
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