Eagle Z 7200 LIQUID CRYSTAL GRAPH User manual

Z-7200
LIQUIDCRYSTAL GRAPH
INSTALLATION AND OPERATION MANUAL
LITHOINU.S.A. 988-0106-09 TNSLE
THEALLAMERICAN
SONAR
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TABLEOFCONTENTS calenergyfromthe transrriitterintoultrasonicsoundwaves. Whenareturn
echostrikes the
transducer, itconverts the sound waves intoelectrical
energy
whichisreceived and
displayedby
thesonarunit.
INTRODUCTION 1
INSTALLATION 1 TRANSOMMOUNT-
Amethodof
mountingtransducers orothersensors
POWERCONNECTIONS 2 onthetransom
oftheboat.
TRANSDUCER 3
KEYBOAJRD BASICS 4 . UPPER/LOWERLIMIT
-Thesearethe
range
limits
displayed
onthesonar
DISPLAYINTERPRETATION 6 screen orpaper. The
upper
limitisshown atthe
top
ofthe
display,while
OPERATION thelowerlimit
isatthebottom. For
example,a20to30footrange
has20
OFF 7 . feetastheupper
limitarid 30feetas
thelowerlimit.
AUTO 7
AUrOMA11CSENSFTIVIry $ VIDEO
GRAPH - AsonarunitthatusesaCRT
ortelevision typedisplay.
RET
SPEED WINDOW
-
Asegment
ofthe
depthrange. For
example,anupper
limitof
RANGE 10 20feetandalowerlimitof50feetcreatesa30footwindow.
LOWERLIMIT 11
AUTO 8011CM TRACKING ZOOM
-Afeaturethatenlargestargets
onthe
display.
GRAYLINE 12
DIGITAL 13
ZONEALARM 14
LIGHT 15
COMMAND 15
MENU #1 .SPEAKER
VOLUME 16
MENU#2-DISCRIMINATION 16
MENU#3-SURFACECLARITY
CONTROL (5CC) 18
MENU#4-DIGITAL 19
MENU#5-DIGITALAVERAGE 19
MENU#6-DIGITALSIZE 20
MENU#7-DIGITAL
TENTHS 21
MENU#8-GRAYLINESET 22
MENU#9-GRAYLINE
CHECKSORLINES 22
MENU#10-ZONEALARMDISPLAYLOCK 23
MENU#11 -PULSE
WIDTH 24
MENU#12
-FEET,FATHOMS,METERS 25
MENU#13-SCALES 25
TRANSDUCERSANDCONEANGLES 26
SIGNALINTERPRETATION 27
ASHSIGNALS 28
WATERTEMP.AND
THERMOCUNES 29
SURVEYINGALAKE 31
BAITFISH 32
HOWTOOBTAINSERVICE 32
SCHEMATICANDPARTS LIST 32
SPAREPARTS 33
SPECIFICATIONS 33
GLOSSARY 34
37
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REMOTE -An intelligent"repeater" unitthat receivesdepth
information
fromanothersonarunit. Aremotedoesn'thave
atransmitter orreceiver.
However,It
doeshaveIt'sownfeaturesthatare adjustable andoperate
separatelyfromthemaster.
RESOLUTION- Theability
ofasonar unittoseparatetargets
fromeach
otherorthebottom.
RMS Astandardratingoftransmitter poweroutput.
SCALE -
The
markings onasonarunit's
display. Todetermine the
depth
ofa
target,simply
comparethe target's
location.tothelocationof
thescale
markersonthe
display.
SECOND ECHO-Anotherechothat registersatroughly
twicethedepth
ofa
targetecho. This iscausedbythesound wavesreflecting offthe
bottom,striking
thesurfaceof
thewater,travellingtothebottom
again,and
returingtothesurface.
SECOND FUNCTION KEY-Abutton
thatconvertsthefunctions
ofthe
primarykeysonthe keyboard. Sonarunits
with asecondfunction
key
have otherkeyswithtwofunctions. Youcan switchfunctions
withthe
second function
key.
SENSITIVITY -Theability ofasonar unit'sreceiver todisplaytargets.
Increasing thesensitivity allows weaker
targets
to be displayed. Also
called
"gain".
SCROLLSPEED-SeeCHART
SPEED.
SHOOT-THROUGH-HULL -Atransducer installation whichallowsthe
sonar
signalstopass
through
a
fiberglass hullwithout
cutting
aholeinthe
hull.
SUPPRESSION-
AmethodusedInsomesonar unltstoeliminate interfer-
enceornoise.
SURFACE CLARITYCONTROL-Reducesor
eliminatesundesirable
sig-
nalsdisplayed nearthe
water's surface. Also
called "5CC".
THERMOCUNE
-Alayer
ofwatercaused bythe meetingofwarmandcool
layers
ofwater.The
thermocline provides the
temperaturemostfish
prefer.
TRANSDUCER- Theelementofasonarsystemthat
convertstheelectri-
INTRODUCTION
When the Z-7200 Liquid Crystal Graph (LCG) isturned on, itwill
automaticallyfind
and
displaythe
bottomsignalandothertargets.Asthe
bottom
depthchanges, the
Z-7200 willautomaticallychange therange
and
sensitivitytokeep
thebottom signal onthe
display. If
desired, the
onlykey thatneedstobetouched istheONkey. However,disablingthe
automaticmodeallows
manual
adlustment oftheZ-7200.
The Z-7200 is nitrogenfilled and sealed for complete
waterproof
protection. The
liquidcrystal display and keyboard
are backlighted for
easyuseatnight. PIus, ft'scovered by afull one
yearwarranty. This
includes allparts
and
laborforone
year
fromthedateofpurchase.
Toget startedwithyour Z-7200,
first
readtheinstallationsection. This
iswhereitallbegins,and Improper
installationcan causeproblems
down
theroad.Afteryou'veread theseinstructions andInstalledyour
Z-7200,
readtherest ofthismanual indetail. Themore youknowwhen
youget
tothe water,
the moreyour
Z-7200willdoforyou.
INSTALLATION
Mounting
Install the Z-7200inany convenient location, provided
thereis
clearancewhentiltedforthebestviewingangle. Holesinthebracket base
allowwood screwor through bolt mounting. Attachthe bracket to
aluminum
panelswith
sheetmetal
screws. Place
a
piece
ofplywoodonthe
backofthin fiberglass panelstosecurethemounting
hardware. Make
certain thereis enough roombehind the unittoattachthepowerand
transducercables.
Youcanroutethe
power
andtransducer cables through
the
7/8"
holeInthebaseof
the
gimbal bracket. Then
pass
them
through
aholein
themountingsurface. Thesmallest holethat will passoneconnector
through
is3/4H Pass
thetransducerconnector
and cable
up
through
the
holeandgimbal bracket. Then pushthepower
cablewiredown
through
thebracketanddash. After
routing
thecables,filltheholewithsilicone
rubberadhesive (RN).Offsetthebracketto
coverthe
majority
ofthehole.
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PowerConnections
TheZ-7200
operatesfroma12voltbattery
system. Attachthe
power
cabletoanaccessory orpowerbuss. If
youhave problems with
electrical interference,then attachthecable
directly
tothebattery. Elec-
trical interference shows as random dots onthedisplaywhenever the
boat'sengine oran
accessory ison.
The
powercablehastwo wires,redisthepositive leadandblack
isnegative or
ground.Attachthein-linefuseholdertothe redwireonthe
power
cablewiththe
crimpconnector. Theotherendofthefuseholder
attachestothe
battery
or
accessorybuss. If
thecableisnot
longenough,
spliceordinary
#18gauge
wireontoit. Becertainthatthefuseholderis
asclosetothe
power
source(battery or
accessory
buss)as possible. This
protects
the
power
cable
and
your
Z-7200in
theeventofashort. Usea3-
amp
fuse.
TheZ-7200has
reverse
polarityprotection. No
damagewilloccur
if
thewiresarereversed. (However,
theunitwillnotworkuntilthewiresare
attached
correctly.)
ofthebottom. Inother
words,
you
cantell Ifthe
bottomissoftorhard.A
hardbottom
returnsa
strongsignalcausing
awidegrayline.
Asoft,muddy
orweedybottom returns aweaker signal which is emphasized with a
narrow
grayline.
IN-DASH-Asonarunit
installed
through
aholeintheboat's
dash.Usually,
thefaceofthesonarisflushornearlysowiththedash.
kl-Iz-Kilohertz. Ameasurementof
frequency. Your
Eagle
sonar
operates
at192Kilohertz. (192,000
cyclespersecond).
LCD-Liquidcrystal display. Thescreen ordisplayofa LiquidCrystal
Graph
sonar
instrument.
LCG-Liquid CrystalGraph.
NOISE - Any undesired signal. Electrical noiseis causedbyengine
ignitions systems,radios,etc.Acousticnoiseiscausedby thevibrationof
theengine orothermechanical sources. It appears onthe
displayas
randomdotsorlines.
OPERATING FREQUENCY
-Frequencythat
thesonar unit'stransmitter
andreceiveraretuned to.
OUTPUTPOWER-The
amplitude
ofelectricalenergytransmitted from
the
sonar unittothe
transducer. Measured in watts, thehigher
theoutput
power,the deeper
asonarunitcan
read,andmoredetailcanbe
displayed.
PEAK-TO-PEAK -Ameasurementofthetransmitters
power
output.
PIXEL -Thesmall dotsorsquares
ona
liquid crystal display
orCRT.
PIXELDENSITY
-
The
numberofpixelsper
square
Inchona
liquid
crystal
display.ThebestresolutionIsobtainedwhen a
high
numberof
pixels
are
in
thevertical.
PULSE LENGTH -Theamount oftimethatthesonar transmits. Thisis
measured in micro-seconds. Theshorterthe
pulselength,thebetterthe
resolution. For
example,a30micro-secondpulselengthisequaltoaone
inchresolution.
RANGE
-
Thesectionofwater
shownonthesonar
display. For example,
a60foot range haszerofor
the
upper
limitand60for
thelowerlimit.
2 35
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GLOSSARY NOISE
ANCHORWATCH-A
settingofthesonar
unit'salarm.Thealarmactivates
whentheboatdriftsintoshallower ordeeper waterthanthe alarm set
points.
BACK-LIGHTED -Adisplay orkeyboard illuminated from behind bya
light.Back-lighteddisplaysand keyboardsareessentialwhefl nightfishing
or
navigating.
CAVITATION-
Airbubblescreated
by
the
highspeedmovementofaboat
ortransducer
through
water.
CHARTSPEED -(1) Thespeed of the chart paperona papergraph
recorder. (2)Thespeedofan
image acrossthescreenofa
liquidcrystal
graph. (Alsocalled "scroll
speed").
CONEANGLE
-Widthofthe transducer's cone of sound. Eagle has
transducers with coneanglesfrom8to45 degrees to suitthevarying
needsoffishermen.
CRT
-AbbreviationforCathodeRayTube. SeeVideoGraph.
DEFINITION-The
ability
ofa
sonarunit's
display
toshow
detail. Ahigh
resolutiondisplay
canshowmoredetailthanalowresolution one.
DISCRIMINATION-
Afeaturethatallows
thesonartoeliminatenoise
and
displayonlytruetarget
information.Discriminationon
Eagleproducts
cuts
outfalse
signalsfromother
sonar, noise,thermoclines, and more.
FISH ALARM
-Analarmthatactivateswhenafishisdetected.
FISHARCH-Asonar withgoodresolution displays
fishsignals withan
upsidedown
"V"orarch.This
distinguishesfish signalsfrom othertargets.
FLUSH MOUNT -Atransom mounttransducer thatisinstalledwiththe
bottomofthetransducerflush
withthebottomofthehull.
GIMBAL
BRACKET - Abracket usedtoinstall asonarunitpermanently.
Thesonarunitcanrotate inthebracket for
thebest
viewingangle.
GRAYLINE-
Thisfunctionshowstherelativestrengthof
signalsdisplayed
onthescreen. Signalsweakerthanthe
GRAYLINE
sellingaredisplayed
in
black,stronger targets
aregray. Italsogivescluestothe
compostition
Minimize electrical noisebyrouting
thepowercable
away from
other
possiblesources
ofelectricalinterference. Oneofthe
largestnoise
generators isthe
engine'swiring harness
thatrunsfromthe
enginetothe
instrument panel. Thisharness
usuallycontains
awireforthetachometer
whichradiates RF (radiofrequency) energy. Forbestresults, keep the
power
and transducer cablesaway fromtheengine wiring. Also, bilge
pumpwiring can sometimes radiate noiseso trytokeepthe7-7200's
cablesaway fromthosewires.
VHFradioantenna cables radiate HF energyat higherpower
levelsthaneventhe
engine'swiring
harness. Itisimportant
to
keep
theZ-
7200's powerandtransducer cables asfaraway
as possible fromVHF
radiocables.
Ifinterferencebeginsat
slowboatspeeds,worsening astheboat
speed increases,thena
probable
cause isacoustic noise, orcavitation.
This noise isnot electrical, but rathermechanically induced noisefrom
thetransducer. Stop
the
boat, put
the
enginein
neutral,andincreasethe
Rpm. Ifthenoise
doesnotincreaseonthedisplay, thenitiscavitation.
Usually, air bubbles passing overthe face of thetransducercreate
acousticnoise.
Thefastera
boattravels,
the
moreairbubblesincreaseand
generate noise on thedisplay. To eliminate this problem, read the
transducer
owner'smanualforproper mountingtechniques.
TRANSDUCER
Installationinstructionsforthe
transducerarewiththetransducer
ina
separate package. Pleasereadtheinstructions carefully beforeyou
installthetransducer.
34 3
a
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KEYBOARD BASICS
Thissection
givesabrief
explanationofthe keyboard. Readthe
Operation sectionfora detaileddescription ofeach
key'soperation.
SENSITIVITY These keys control
thegraph'ssensitivity. (rhodigital
automatically
ad
justs
its
sensitivity.)
The
receiversensltMty has32
steps,
allowing adjustment over a wide
range ofconditions. Theleftarrow
key
decreases the sensitivity, the
rightarrow keyincreases It.
RANGE Thearrowkeys allowthe
selectionof
depthranges. Pressthe
up arrow to decreasethe range
depth. Press the down arrowto
increase therange.
ZOOM Targets on the display
enlarged to twice normal size or
"zoomed"withthis
key.
ONOFFThesekeys
turnthe2-7200
on and off. Toturn iton,simply
press
the ONkey. ToturnItoff,
press
theOFF
key.
Pressing any keygener-
ates atoneor"beep."ThisistheZ-
7200's
wayof tellingyouthatithas
accepted
acommand.
4 33
SPARE PARTS
The
following
isalistofthemost
commonly
needed
parts. To
order,
simply
writethelistofpartsrequiredonaslip ofpaper andmail
ittothe
above address.
(Note: Price
subject
tochangewithout
notice.)
PartNumber
151-0071-00
003-2250-00
003-2223-00
003-2181-00
988-0106-09
Description
PowerCable Price
Gimbal Knobs(w/washers, 2ea.) 3.95
Gimbal Bracket 7.75
6.75
FuseHolder (w/3 ampfuse)
Owner's Manual 3.95
SPECIFICATIONS
Dimensions
2.50
Weight
Transmitter
5
3/4"Hx83/16W
x2
5/SD
1 3/4pounds
Frequency
OutputPower
ReceiverSensitivity
192kHz
500watts
peak
topeaktypical
63.5watts RMS
Operating Current
>85db
temperature stabilized
OperatingVoltage
200ma(lights off)
500ma(lights on)
Number
ofpixels
9-15vdc
DepthCapability
192x64 (verticalxhorizontal)
12,288
Total
300'-500'typical
(with20degreetransducer)
500'-700'typical
with8
degreetransducer)
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BAITFISH
Theimportance ofbaitfish tosuccessful fishingcan'tbeover-
emphasized. Theyaretheprinciplefoodofall game
fishin mostwaters.
Baitfisharethe
planktonfeedlngforagefish,
suchas
minnowsand
shad. Baitfishcanalsobetheyoungofgame fish, suchas crappies,
bluegill,andbass.
Mostbaitfish concentrate withinfIvefeetofthesurface where
sunlightpromotes thegrowth oftheplankton onwhichthey
feed. One
method
of
fishingistousetheZ-7200to
findthebaitfishfirst.Aschool of
baitfish
willlooklikea"cloud"ontheZ-7200's
display. Usually,gamefish
willbenearby,oftendirectly
beneaththeschool ofbaitfish.
KEYBOARD BASICS
TheCHARTgroup
ofkeys
controlsthe chart speed. The Z-
7200has 10chartspeeds, ranging
from very slowtoFAST. Pressing
the right arrow key speeds upthe
chartspeed. Theleftarrow
keyre-
duces it. Press both keys atthe
sametime
tostop and restrart
the
chart
display.
32 5
ZONEALARM
KEYS Thisgroupof
keys controls the Z-7200's zone
alarm. ft's commonlyusedasa
"fishalarm."Any target (such asa
fishorschoolof
fish)willsetoffthe
alarm ifitenters thealarm zone.
COMMANDFUNCTION The Z-
7200has "menus"offeatures
that
are accessed by pressing both
range keys
atthesametime.
Note: TheZ-7200 hasmany
morefeatures thantheones
justdiscussed.Foradetailed
lookattheZ-7200's features
and operation instructions,
readtheOperation sectionof
thismanual.
UGHTPressboth sensitivitykeys
at
thesametlmetotum the
lights
onor
TheAUTO key switchesthe2-
7200in oroutoftheautomatic mode.
The2-7200 automaticallyadjusts
the
sensitivity and range selection at
power on. Pressing theAUTOkeyal-
lows
you
totakecontrol
ofthe
2-7200,
making manual adjustments
as de-
sired. WhentheZ-7200isin
theauto-
matic mode, the word "AUTO"dis-
playsimmediately
below thesensitiv-
itybar.
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DISPLAYINTERPRETATION
Nowlet'slookatthe
display.
First,
we'll
turnontheZ-7200
bypress-
ing
theON
key. The lights
willflashfor
six
seconds.Thechartisnowscrolling
thereturn echoesacrossthescreen
and the digital is searching for the
bottom
depth. It'sflashing0because
ithasn'tfound
thebottom
yet. Once
itfindsthebottom,
thedepth isdis-
played.
Herethe Z-7200 has found
thebottomat 49feet. Therange is
zero to 60 feet. It automatically
choosesalowerlimitthat placesthe
bottomsignal nearthe
bottomofthe
display.
Thebaratthe
top
ofthedis-
play
isthe
sensitivity bar. Itshowsthe
sensitivity in use. Thebar extends
from left to right. A veryshort bar
indicatesminimum sensitivity. Settingthe
sensitivity
tomaximumcauses
thebartoruncompletely
acrossthe
top
ofthe
display.
ThewordAUTO indicatesthe
Z-7200isin theautomatic mode.
The
top
line ofthe
display
isalways
adashed line. Itmoves
from
right
toleft,showing thechartismoving. Asthechart
speed
increases or
decreases,the dashed line
changes
speedaccordingly.
Theword'STOP"
appears
whenthechartisstopped.
Therangeisbothan upperlimitand alowerlimitatthe
top
and
bottomof
the
display,respectively. In
thisexample, the
range
iso-60feet.
Scale markers printedonbothsides ofthedisplayhelpdeterrnine the
actual
depth.
For bestresults,readtheQperation section
ofthismanual. It
explains in detail all ofthe functions that are in thissection,plus other
featuresnotdiscussed here.
The
temperature of
waterinthelakeisseldom constant fromtop
tobottom. Layers ofdifferent
temperaturesform,and the
junctionofa
warm
andcool
layer
of
waterisathermocline. The
depthandthickness of
thethermoclinecan
varywith
the
seasonortimeof
day.In deep
lakesthere
maybetwoormoreatdifferent depths. Thermoclinesare Important to
fishermen becausetheyareareaswherefishareactive. Many
timesbait
fishwillbeabovethe
thermoclinewhile
largergamefishwillsuspend inor
Justbelowit.
TheZ-7200 candetect
this invisible layer Inthewater, butthe
sensitivitywill probably
havetobeturned uptoseeit.
Aknowledgeofthe
water
temperatures
variousfish
prefer,andin
which
theyusually remain,helpsyouget
themostfromyourZ-7200.
SURVEYINGALAKE
Themostsuccessfulanglersonanybody
ofwaterarethose
who
fishit
day
after
day
and
year
after
year. Eventually,they
learnthehot
spots
that
produce
fishconsistently. They
discover
throughexperience where.
and
atwhat
depth,theycanexpectto
findthefishtheywant
at
anyseason.
And
theyrealizethatthese productiveareaschangethroughout the
year
depending
onwater
level,temperature,food, and otherfactors.
WiththeZ-7200,anyone can
eliminateguesswork andconcen-
trateon
theareaswherefishare
likely
tobe. Evenifit'sthefirsttimeonthe
lake!
Themostefficient
way
tobecome
acquaintedwitha
body
ofwater
isto
survey
it
with
your
Z-7200. Startwitha
map
ofthe
lake,
if
possible,and
indicatethe
promising spots
in relationtolandmarkson
shore.
Asyou go about
your
survey,yourZ-7200willtell youthedepth
and
typeofbottom. Itwillalsorevealsuspendedfish. Multiplesignalson
the
dialusuallyindicatea
goodschooloffishand it'sworthIttostop and
fishforthem. You
maynot get
any
further.
Keep afewmarker
buoys
intheboat, ready totossoverboard.
WhentheZ-7200indicatesaschoolof
fish,throwthe
buoy
out. The
string
willunwind untilthesinker
hitsbottom. Then,becauseofthemarker'sflat
shape,Itwon't
unwindany further. Withthe
schoolthus
marked,youcan
make yourturnandcomebacktofishinexactlytherightspot. Thisis
essentialwhen
you're
farfromshoreona
biglake. Unlessyou markthe
school offishwhen
you'reover it, youmay notbeabletofind it
again.
6 31
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OPERATION
When the Z-7200 Isfirst turnedon, It automatically
finds and
displays
thebottom
depth, andadjusts
the
sensitivitytothe
proper
level.
Italso setsthescalestoarangethatwillkeepthebottomsignal onthe
display, plus much more. Using theZ-7200 inthismodeissimple and
allows
you
toconcentrateon
fishing. However,virtuallyevery
functionof
theunitis
manuallyadjustable
softcanbe
"finetuned"tothe
surrounding
conditions.At
first,takethismanualwithyouasareferenceguide.
ON TheONkey
islocated Inthelower
right
cornerofthe
keyboard. It's
easily
foundinthislocation-evenatnight. To
turntheZ-7200on,press
theONkey. Anaudible
beepreflectsthe keypress. Thechart
lightswill
beginflashing,then stop
aftersixseconds. Thechartwillbegin scrolling
acrossthe
display
andthenumber"0"willflash. ThisnumberIsthe
digital
bottom
depthdisplay. Aftertheunitfindsthe
bottom,
itdisplaysthedigital
depth.
[FFIH
OFF Toturnthe
Z-7200off, press theOFFkey.
F;]
AUTO Theautomatic modeisenabled
whentheZ-7200isturnedon. To
switchtothemanualmode,pressthe
AUTOkeylocated
abovetheONkey.
PressingtheAUTO keyerasesthewordAUTOatthe
topofthe display.
Thiscancelsautosensitivity and ranging, giving you complete manual
control oftheunit. Return
theZ-7200toautomaticat
anytimebypressing
theAUTO keyagain.
Most fish don't spawn unless thewatertemperature is within
rathernarrowlimits. To
findthedufferent
temperatures.asurface
tempera-
turemeter, suchastheEDT-20isavaluable aidtoyourboat. Thisunit
provides anextremelyquickresponsetoidentifyingthedesired surface
water
spawningtemperaturesforvarious
species. Troutcan'tsurvive in
streamsthatget
too
warm. Bassand other
fisheventuallydie out
when
stockedin lakesthatremain
toocoldduring thesummer. Whilesomefish
have
awider
temperaturetolerancethanothers, eachhasacertain
range
within
whichittriestostay. Schoolingfishsuspended
over
deepwaterlie
atthelevelthatprovidesthis temperature. Weassumetheyarethemost
comfortable here.
30
C)
C
7
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Ifa partial archoccursmost ofthetimeonyour unit(themark
curvesup,butnotback
down,
or
vice-versa)It
couldbethetransducer is
not
pointingstraightdown.
Adjust
atransom mountedtransducer untilthe
fish
showthedistinctive
arch. This
may
takesometrialand
erroruntilyou
achievethecorrectmounting.
SENSITIVITY
Whenfirsttumedon, theZ-7200isintheAUTO SEARCHmode.
The
micro-computer
automaticallyadjusts
the
sensitivity
andrange tofind
and lock ontothebottom.Youcanleavethesensitivityin
theautomatic
modeormanuallyadjust Ittosuitconditions.
Ahorizontal baratthe
top
ofthescreendisplays
thesensitivity
level. Whenthe
sensitivityisat minimum,thebaris
very
short. Increasing
thesensitivity causesthebartotravel totheright, increasing Inlength
correspondingly. Settingthe
sensitivity
tomaximumwill
causethebarto
extend acrossthetopofthedisplay. (There
are32 steps
ofsensitivity
available.)
Toplace the
Z-7200 in manualmode, pressthe
AUTO keyonce.
This
turnsauto
sensitivityoff. ThewordAUTOatthe
top
of
the
display
will
disappear, signifying that
theZ-7200isInthemanual mode.Toincrease
the
sensitivity,press and hold
theright arrowkey untilthe
sensitivity isat
the
desired level. Theleft
arrowdecreases
sensitivityinthe
samemanner.
Noticehow
the
sensitivitybarmovesas
youchange settings. Whenyou
press
the
right
arrow
key,
thebarmovestothe
right,indicating
anincrease
insensitivity. Pressing
theleft
arrow
keymovesthe barto
the
left,
showing
the
sensitivity has
decreased accordingly. You'll alsoseethe
change on
the
display.
Onthenext
page,the photoon
theleftshowsa
graph
withtoolittle
sensitivity. Ontheright,thegraph hasaproper sensitivity setting. Afish
along
withhighersurface clutterarenow
visible,andthebottom
signalhas
widened.
When the horizontal barreaches thefarright hand side ofthe
screen, the
sensitivitylevel isatmaximum. With
highsensitivitysettings,
asecond bottom
echo(second echo) mayappear. ThisIs normal. It's
causedby the
returningsignalreflectingoffthesurface ofthewater. Then
itmakesasecondtrip
tothebottomand backagain.
TotumAuto
Sensitivityback
on,
press
theAUTOkey. Remember,
pressing theAUTO keyturnsboth automaticsensitivityandautoranging
functionsonand off
atthesametime.
Remember,there mustbesomemovementbetweentheboatand
thefish todevelop
thearch. Usually, thismeanstrolling atveryslow
speedswiththemain enginein gear
ataminimumthrottleselling.
The
depth
of
thewaterwillaffectthesizeandshapeofthefisharch
duetothecone
anglediameter. For
example,
Ifthecone
passes
overafish
in shallow
water, thesignaldisplayed onthe
Z-7200 may notarchatall.
Thisisduetothenarrow
conediameter andthe
resolutionlimitationsofthe
display. Eventhe20degree
transducerhasonly a
3footdiameterat
this
depth.
Compared toa papergraph, aZ7200cannot showas fine of
detail. Thereasonfor
thisisthe
pixels(dotsonthe
screen)aremuch larger
thanapapergraph's
markings. Therefore,theZ-7200cannotshowfish
archesaswellasa
graph. Plus,itrequiresabitmore workinitially toread
andinterpret thescreenthan
a
papergraph.
Very
smallfishprobably
willnotarchatall. Mediumsizedfishwill
showa
partialarch,
ora
shapesimilartoanarch ifthey're in
deep
water.
Large fish willarch, butturnthe
sensitivityupindeeperwatertosee the
arch. Because ofwaterconditions, suôh as heavy surface clutter, th-
ermoclines,etc.,the
sensitivity
sometimes
cannotbeincreased
enough
to
get
fisharches.
Oneofthebest
ways
toget fisharches is
toexpand or"zoom"a
segment
ofthewater. For
example,
40to6ofeet.
Thesmallerthe
segment,
thebetter
thescreenresolutionwillbe.Then,
turn
up
the
sensitivity
ashigh
aspossible without
getting
toomuch noiseonthe
screen. Inmedium
to
deepwater,
thismethodshouldworktodisplayfish arches.
WATERTEMPERATUREANDTHERMOCLINES
Water
temperature hasan important-if notcontrolling-influence
upon
the
activitiesofallfish. Fisharecoldblooded andtheir
bodiesare
always thetemperature ofthesurrounding water. During
thewinter,
colderwater
slowsdowntheirmetabolism. Atthistime,they
needabout
afourthas muchfoodas
theyconsume inthesummer.
8 29
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a
AUTO
SENSITIVITYOPERATION
WhentheZ-7200isin
theautomatic
mode,thereceiver'ssensitiv-
ity automatically adjuststo the surrounding conditions. The micro-
computerplaces itatalevelslightly
above
theminimum required topick
up
thebottom
signal.
Changingthesensitivity
levelwhiletheZ-7200isintheautomatic
modeis
possible. This
may
bedesirableifthe
sensitivity
levelisnot
enough
toshowfishorother
smalldetail. TheZ-7200
willincreasethe
sensitivity
topick upthebottomsignal,thenadd inthelevel youprogrammed. If
desired,you canaddsensitivityup
tothemaximum.
Toadjustthe
sensitivitywhilethe Z-7200isintheautomatic
mode,
simplypress
eitherthe
rightarrowkey>toincreaseit. Presstheleftarrow
key c todecreasethe
sensitivity. Ifthevalue goes
belowtheminimum
requiredto keep
thebottom
signal,
theZ-7200'saudible
tonewillsoundan
alert. Thesameistrueif
youtry
togoabovethemaximum level. Asyou
press
thearrow
key,the sensitivity
bar
willmoveright or
left,according
to
the
sensitivitylevel chosen.
28 9
Brush usuallyliesonthebottomandshows upasclumps
rising
abovethebottom signal. Brush signals look similar to large rocks,
howevertheirsignalisnot
asstrong asrock.
FISHSIGNALS
Thesignals displayed on the Z-7200 by fish are Identified by
various
shapedmarkingsIncertainpatterns,
as
opposed
to
randommarks
created
bynoise. Orthe
solid,
continuous markings madeby
thebottom.
Typically,fishareidentifiedby
acharacteristicarchthat
separates
themfromtheirstationary surroundings. Thereason for
thisIs shown
below. Thedistancetoafishwhen
itmovesintothesonar'sconeofsound
isshown as"A" below. Whenthefishhas
moved intothecenter
ofthe
cone,
thedistancetoitwillbeshorter,
"B".Asitmovesoutofthe
cone,the
distance
willincrease againasshown in "C".
2
4
di
a
69'
SENSITIVITY: TOOLITrLE SENSITIVITY: ADJUSTED PROPERLY
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La
I
CHARTSPEED
At
poweron, thechart
speed scrollsatapre-determined speed.
Fora
higher
speed,press
andholdthe
FASTkeyintheCHARTsectionof
the
keyboard. Whenthescrollspeedreaches thedesired speed,release
theFAST
key. Toslowthe
display,press
andholdtheSLOW
key. Pressing
eitherofthese
keys causesthesensitivitybaratthe
topofthe display
to
change
toadashed line. Theletters "CHT"willalso appear
inawindow
nearthe
topof
the
display. Thebar representsthechartspeed. Ifyou
press
andholdtheFAST
key
for
example,thebarwillstart
moving
tothe
right. This signifiesthatthechart
speedisincreasing. Thereare10
steps
ofchart
speed. By
holding
eithertheFASTorSLOWkeys,
the
displaycan
bespeededup orsloweddown.Whenthehorizontal barreachesthefar
rightside ofthe screen, thechartspeed isatitsmaximumvalue. TheZ-
7200willsounda
tone indicatingmaximum chart
speed.
Attimesitisdesirabletostop
or"freeze"the
display
toexamine
anechobefore itscrolls offthescreen. Pressing botharrow
keys inthe
CHARTsectionat
thesametimewillfreezethe
display. Nowthe topline
onthedisplay will
flashonandofftosignify
thatthe unitisin thefreeze
mode. Pressingbothkeys
atthesametimeagain wiilstartthe
display
movingatthelast
chart
speedselling. If
the
digital
sonarison,thebottom
depth
willcontinue tobedisplayed. The
digital
doesnot
stop
whenthe
chartisin
the"freeze"mode.
SCALE Therearetenscalemarkersprinted onboth
sidesofthe
display.
Thishelps
todeterminethe
depth ofa target. For
example, ifthe range
is
0to60feet,theneach markisequaltosixfeet. Ifa
target(suchasa fish)
isnexttothe5th
line,
thenitis30feet
deep. (5linestimes6feet
=30
feet.)
RANGE LTh1
WhentheZ-7200isinautomatic, the
ranges change tokeepthe
bottom signal on thedisplayas the bottom depth varies. At times,
however,itmay
bedesirabletoexpand the
range
orzoomin ona
target
PressingtheZOOM keydoublesthesizeoftargets
onthe
screen.
The20
degreetransduceris
almost
always
thebesttouseinfresh
water,
the8
degreemostlyinsaltwater. Ina
deep
water
environment,(300
feet -fresh water, 100feet-saltwater)
thenarrowconeangle Is more
desirable. Sincethesound
energy
isconcentrated
inasmallerarea,
itcan
penetratetomuch
deeperdepths,
Both8
degree
and20degreetransducers giveaccuratebottom
readings,eventhough
thebottom
signalismuch
wideronthe20degree
model. Thisisbecause youareseeingmoreofthebottom. Remember,
theshallow
edge
ofthe
signalshowsyouthetruedepth. Therest ofthe
signal tells youwhether
you
are overrocks,
mud, etc.
Paint transducers on sait waterboats with athin coatofanti-
foulant
paint
topreventorganismsfrom
growing. If unchecked, barnacles
andothermarine
growthwillcauseadecrease in the
transducer's sensi-
tMty. Donot
useametal basedanti-foulantpaintasitwill decrease the
transducer's sensitivity. Therearespecialanti-foulant paintsspecifically
designed fortransducers. They'rereadily availableatmostmarinedeal-
ers.
SIGNAL INTERPRETATION
Since your 2-7200 is both extremely sensitive and powerful, it
gives
anaccurate
picture
ofthebottomthat
your
boatis
passing. Abottom
offirmsand, gravel, shell,orhardclay
returns a
fairlywide
signal. Ifthe
automatic
sensitivityisoffandthe signalnarrows down,
thenitmeansthat
youhave
moved overamud bottom. Mud absorbsthe sound waveand
returnsaweak
signal. Turn up
the
sensitivity. If youhavetheautomatic
sensitivityturned on,watchthe
sensitMty
bar.As
theboat
passesoverthe
mud bottom,the Z-7200 wiil automatically increase thesensitivity to
maintain a good bottom signal. The sensitivity bar will helpyou In
determining if
thebottomissoftorhard. Ifitincreaseswhileinthesame
depthof water,
thentheboathasmovedover
asoftbottom. Ifit
decreases,
thenitisoverahard bottom. Of
course, as thewater
depthincreasesor
decreases, the
sensitivitywillalso change.
Bigrocksor stumps
onasmooth bottom
sendback
signalsabove
thebottomlevelsignal. Theheightofthesignaldepends
onthe
target's
height. Asyou passoverapost, itwill bedeaflyvisibleas ashort line
extending abovethebottom
signal.
Asteepslope
returnsawide
signal,the steeperthe
wider.Signals
returned froma
highunderwatercliff
are usuallythewidestofall.
10 27
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TRANSDUCERSANDCONEANGLES
Thesoundwavesfrom
thetransducerspread
outintothe
waterin
acone
shapedbeam.Thislooks
muchlikethebeam from aflashlight.
The
angle
betweentheoutsideedgesoftheconeisthecone
angle.
Eagle
offersachoiceof
transducerswitheitheran&or
20degree
coneangle. Thesewill interchangewithanyofthe192kHz
sonarproducts.
Inotherwords,
use
any
Eagle
sonarinstrumentwith anyEagle
transducer
ofthesame
frequency
withnolossofperformance. However,theuseof
anyother
manufacturers'transducerwillresultInaloss ofperformance.
Typically,widecone
angle
transducers (20degrees) areidealfor
operating
Inshallow
tomediumwaterdepths. The20degree cone
angle
allows
you
tosee
moreoftheunderwaterworld. In15feet
ofwater
the20
degree cone covers an area about six feet across. The 8 degree
transducer
covers only
aboutatwofootcircle.
LOWER LIMIT
To
changethe
lower
limit,first makecertaintheword"AUTO"isoff
atthetopofthescreen. Thisindicates thattheautomatic
modeIs off.
(Note:Thisalsodisables theautomatic sensitivityfunction.)Iftheauto-
matic
modeison,press
theAUTO
key
oncetodisable
it. Next, pressone
ofthearrow keys In the RANGE section.until thedesired lower limit
appears. The
display
willimmediatelychangetothenew depth
rangeand
displaythe
newlowerlimit atthebottom
ofthescreen.
NOTE: Themaximum lowerlimit theZ-7200 can displayis1000feet.
However, theactual depth
that itcanreach Is
dependent onwater
and
bottom
conditions,plusthe qualityofthetransducer installation.
ZOOM [;;M]
Oftenit's
desirabletoexpand or
"ZOOM"asection
ofthe
display
toshowmoredetail. YoucandothisontheZ-7200 byusing
theZOOM
feature. Iftheunitisinthemanualmode,press
theZOOMkey todouble
thesizeofthe
targets.For
example,ifthe
rangeis0-60feet, pressingthe
ZOOM keychanges therange
to30-60
feet. This30-60rangeiscalled a
"window".To
change the
windowsize, press
the
up
ordownarrows
inthe
ZOOM:30-60FEET
--
C ':0
IA
-- A -
26 11
B.th coneAngle
D4.melt
a- 20'
50 it tilt.
100 14- 25—
150 21 53-
200 2S- 71-
50'
100'
RANGE:0-60FEET
._zSEIi(SII1VfTV
2
150'
20°
at
af.r'.C.r.
200'
16
21
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RANGE
section. For
example,If
youhavea30footwindow, pressingthe
uparrow intheRANGEsectionwillchange thewindowto
20feet. Press
the
up
arrow
again
andthe
zoomwindowwill
changeto10feet. ThisIsthe
smallestzoomwindow. The
largestzoomwindowis 300feet.
AUTOMATIC BOTTOM TRACKING
Thelowerlimitwillchangeasthebottom
depth
changes, iftheZ-
7200Is in
theautomatic mode. Tozoominonthebottomandtrackitas
itsdepthchanges,followthe
steps
below.
Touse
this
feature,
first
makecertaintheZ-7200
isintheautomatic
mode. Ifitisn't, presstheAUTOkey. Next,chooseazoom
window. For
example,lets usea20footzoomwindow. ThismeansthattheZ-7200will
keepthe
upper
limit20feetabove
thelowerlimit.Automaticallyplacing
the
bottom
signal inthiswindow,the Z-7200tracksitasitmovesshalloweror
deeper. PresstheZOOM key. Thezoomwindowsizeappears onthe
upper
center
portion
ofthe
display
forafewseconds. Ifyou
don'thavea
20foot
window,
presseitherthe up
ordownarrowsintheRANGEsection
untilthe
upper
limitis20
feetshallowerthan thelower
limit. The2-7200will
choose
an
upper
andlowerlimit
thatwill
place
thebottom
signalinthe20
foot
window.Thebottomwillalways
beinsidethis
window. Ifthe
segment
sizeis40feetor
greater,thewindowlimitswillendin zero(10,20,30,etc.).
Otherwisethelimitsare inone
footincrements.
Toexitfromthis
function, presstheZOOM key.
GRAYLINE
TheGRAYLINEfunctionstells the relative strengthof signals
displayed
onthe screen. Italsogives cluestothecomposition
ofthe
bottom. Inotherwords, youcantellIfthebottomissoftorhard. Ahard
bottom
returnsa
strong signalcausingawide
gray
line. Asoft,muddy or
weedy
bottomreturnsaweakersignalwhichisemphasizedwitha
narrow
grayline.
If
youhavetwo
signalsofequalsize, onewithgray
andthe
other
without,thenthetargetwith grayIs the strongersignal. Thisishelps
distinguish weedsfromtreesonthebottom,
or
fishfromstructure.
When theZ-7200 isfirst turned on,theGRAYLINEfunctionis
automatically
on. Normally, it doesn'trequire adjustment. However,
shouldyoudesire tochange theGRAYLINElevel, seemenu #8inthe
COMMAND section,
——. -—
r
2.....
Ii:i
6
11
FC H:
J FFE..S
MENU#12-FEET, FATHOMS, or
METERS
The
2-7200 can
display
the
depth in either feet, fathoms, or
meters. At
first,
the
display
readsin
feet. Tochange tofathomsorme-
ters, press botharrow keys inthe
RANGE sectionatthe sametime.
Using thesamearrow keys, scroll
through themenus untilmenu #12
appears. Usethearrowkeysinthe
ALARM section toselect
feet, fath-
omsormeters. PresstheAUTO
key
toactivatetheselection.
MENU #13 -SCALES
When theZ-7200 isturned
on,the
upper
andlower
range
limits
areautomatically displayed
onthe
right side ofthedisplay. Toturn
them
off, press both arrow
keys in
the RANGE sectionat the same
time. Using the same arrowkeys,
scrollthrough themenusuntilmenu
#13appears. Usethe
arrow
keys
in
the
ALARMsectiontoselectONor
OFF. Press theAUTO keytoacti-
vatetheselection.
12 25
——
- £PV'JTIVITV
a
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TC —
1: Ci.R t
aLia
_1
0
2
.4
I-
L.
GRAYLINE: OFF
24
At
power
on,
the
digital
willflash"0"until ithas"lockedon"
tothe
bottom
signal. Once
ithas
acquired
thebotlom
depth,
itwilldisplay the
depth in thelowerleftofthe display.
Thedigitalcandisplaythe
bottomdepth
lntenthsofafootinwater
shallowerthan100feet. SeetheCOMMAND
sectionfordetails.
Therearetwodifferentsizesofthe
digitaldepthdisplay. They
can
be
easilychanged
withamenuselection. SeetheCOMMAND sectionfor
details.
13
2 PULSE
t,tj1L fl
MENU #11 -PULSEWIDTH
Thereisa
relationshipbe-
tweenresolution andtransmitter
pulse width. Resolution, In this
case, Is theabilityofasonar
to
separatetargets. Theshorterthe
pulse
width,
thebetterthesonar's
ability
toseparatetargets. How-
ever, in deepwater, theshorter
thepulse
width,the less likely a
return echowill bereceived. In
fact, the Z-7200 automatically
increasesthe pulse width asthe
range increases. Inshallowwa-
ter,anarrowpulse
widthisbene-
ficial,sincethe probability ofecho
detection ishigh. Forevenbetter
target separation, the Z-7200
givesyou
the
capability
tonarrow
the pulse width. Combine that
with
atwentyfoot
zoomandtheZ-
7200
displaysdetailfarbetterthan
SENSJflvir
V
t
U
I6
'I
A
4 a
6 I.
L
- 7- ;•-
2
—, SHflRT
6
FOF HO
PRESS 414
-' ,Ls
22
24
other
liquid crystal graphs. Tochangethe
pulse
width,press both
arrow
keysintheRANGEsectionatthesametime. Using
thesamearrow
keys,
scrollthrough themenus until menu#10appears. Usethearrowkeysin
theALARMsectiontochange the
pulse
fromnormaltoshortorback
again.
PresstheAUTO keytoactivatethe
selection.
GRAYLINE: ON
DIGITAL
Built;nsidetheZ-7200isa
completedigitalsonar. Itautomatically
discriminatesbetweenthevalidbottomechoesandfalseechoesfrom fish,
thermoclines, or othersignals. The digital displaywillshowonlythe
bottom
depth. Useitanytime,regardlessofthemodetheZ-7200Is in.
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Sr
[ttrI
SI•*LLnWUT ole.Ut FOR NO
CHflJ40E
nflrr-r-
rr,co-:.
12.. AUT
_1
Toget themaximumperformance outofyour
digital sonar,stop --—-. MENU
#10-ZONE
ALARM
DISPLAY
thechart
bypressing both arrow keys
atthesame
timeinthe
keyboard's
chartsection. ThisturnstheZ-7200intoa
digitalsonar
only
andallowsit a..... - - - LOCK
tobettertrackthebottom
signal. A goodreasontousethe
digitalisif you • . Thismenu allows toturn
are goingtotravel athighspeed andyoujustwanttoknowthebottom
depth.Stopthechart,then change
to
the
largedigital number size. This
willgive both thefastest possible depth updates plus an easy-to-read
display. 4 "..
you
thealarm baroncontinuously. When
theZ-7200isturned
on,
thezone
alarm
baris
on
only
whenthezonealarm Is
adjusted. Toturnthebaroncontinu-
ously, press both arrow keys in the
--- --
"-•
.
Ifyou
wish toturnthedigital displayoff, seethe COMMAND
section
fordetails.
ZONEALARM
—
.
...
.
,.'
.
RANGEsectionatthesametime. Us-
lngthesamearrowkeys,
scrollthrough
themenus until menu #10 appears.
Usethearrow
keys IntheALARMsec-
tiontoturnthebaronor(ifit's
already
on
continuously) off. PresstheAUTO
keytoactivatetheselection.
— . -
rgai'i.j21vt
Toset
theZone
Alarm,press
theSHALLOW
SET
keyintheZONE
ALARM
sectionofthekeyboard. Theletters"ZR
appear inthelowerleft
cornerofthe
screen. Avertical baralsodisplays
ontheleftside ofthe
screenforsixseconds. ThisistheZoneAlarm's
"window."
Anyechothat
appears between thetopand bottomofthisbarwill sound thealarm.
Adjust
boththeshallowanddeependsofthisbartomakeasmalleror
larger
alarm"window."
Toadjust the
shallow
(top) alarm, pressthe
SHALLOWSETkey.
Thealarmbardisplayswithasmallarrowpolntingtothetopofthebar
This
signifiesthatthe
top
orshallowportion ofthebarisreadyfor
adjustment.
Thenpresstheuparrowkeytomovethetopofthealarmwindowup.
Press
thedownarrow
keytomovethe top
of
thezone
deeper. Sixsecondsafter
the
adjustments aremade,thealarmbardisappears.
ZONEALARM BAR:
OFF
..
C . --;
-- -•
. .. -
L... . I
.
--
:..
..
ZONE ALARMBAR:
ON
....
-..... ;;-:::,..-. ..—— - -.
-
.;.
— I
¶. ...
— ..
.--
i—-- A .-
Setthebottomofthe
zoneinthesame mannerusing
theDEEP -
SET
key. PresstheDEEPSET
key. The
alarm bar
displays
with
thesmall•
arrowpointing tothebottomofthebar. Then
press
theuparrowkeyto
makethebottom
partofthe
windowmoveshallower. Or
you
can
press
the
downarrowkey tomovethebottomof
thewindow
deeper. Releasethe
keys
andthebarwillremainonthescreenforsix
seconds,then
disappear.
. .
...
.
--
.
. -
- - .
.;
-.
.
Whenthe"ZA"lettersare
on,
thealarmisactive.If
you
wishtoview
thezonealarm
bar,simplypress eithertheSHALLOWSETorDEEPSET
14 23
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22 15
MENU#8-
GRAYLINE SET
Toadjust theGRAYLINE
level,
pressbotharrow
keysinthe
RANGE
sectionatthe
sametime.
Use the same arrow keys until
menu#8
appears. Presstheup
arrow keyintheALARMsection
toturnGRAYUNESET on. The
menu
disappearsandtheZ-7200
returnsyou
tothechart display.
Theword"GRAY"
appearsinthe
upper leftcornerofthe screen.
Thissignifies that the sensitivity
bar now showstheamount of
GRAYLINEinuse. Toincreaseor
decrease the GRAYLINE level,
presstherightorleftarrow keys
intheSENSITIVITYsection. After
thedesired level isattained, wait
sixseconds and GRAYLINE
will
turnitself off.
MENU
#9-GRAYLINE
CHECKS
ORLINES
GRAYLINE is normally
displayed with a checkerboard
pattern (checks). Using this
menu, the pattern can be
changed to horizontal lines. To
change,pressbotharrow keys in
the RANGEsectionatthesame
time. Using thesamearrow
keys,
scroll through the menus until
menu#9
appears. Usethearrow
keysintheALARMsectiontose-
lectchecksor lines. Press the
AUTOkey toactivateyourselec-
tion.
PtH)
2 ;,:rE, L..r-L.L,
—
a
6 37
t::!P'
-
H PRESS
'IC ' MUT a 10
I—s S
I (
'— TO OH
''c 4..
C
F
keys. Thebar
willbedisplayed forsix
seconds. Thezonealarm barcan be
turned on permanently with a menu.
SeetheCOMMANDsection
fordetails.
Whenanecho
appearsonthe
right side of the screen In the area
covered by thezonealarm bar, the
words "ZONE ALARM" flash on the
screen.
If the range ischanged,the
zonealarm mayneed tobe changed
also since itdoesnottrack range
set-
tings.
WhentheZ-7200isturnedon,
thealarm'sspeaker
isnotactivated.To
turn the ZoneAlarm'sspeaker on,
press boththeSHAL SETand DEEP
SETkeys atthesametime. Pressing
theSHAL SETandDEEPSETkeys
at
thesametimeagainwillturnthealarm
offand allsettings
willbeerased.
LIGHT Alight
isallows
operation ofthe
Z-7200atnight.At
first,
turning
the
unitoncauses
the
lights
toflashforsixseconds. PressbothSENSITIVITY
keys
atthesame
timetoturnthe
lights
on.Toturnthelights off,
press
both
keysagain. Thelights
willalsogo outwhentheZ-7200 isturnedoff.
ITTTI
COMMAND
TheZ-7200has"menus"ofcommandsthat
allowsyou
tocustom-
izetheunitto
yourneeds. Thereare13pagesofmenus available. These
menusareaccessedwiththeRANGE
keys. Pressbothkeys
atthesame
timeand
thefirstmenu appears forsixseconds. As youcanseeinthe
photoonthenext
page, thefirstmenuIsSPEAKER
VOLUME.Thenumber
"1"
atthebottomofthescreenIndicatesthisIs menunumber one.
L.iNE'S:':
FÜR NO
l£—!1•t C.
PRESc; S
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MENU
#1-SPEAKERVOLUME
Thismenu lets you adjust
thespeaker
volume. Therangeis
fromsoftQow)toloud. WhentheZ-
7200isturnedon,
thespeakervol-
ume ismedium soft. Tochange it,
press both arrow keys in the
RANGE
sectionofthekeyboard at
thesame time. Since speaker
vol-
umeIsthe
firstmenuitappears im-
mediately.Usethearrow
keysinthe
ALARM sectionto change to the
desired setting. Then press the
AUTO keytoexecute the change.
Or
press
oneofthearrow
keys
inthe
RANGE sectionto change to an-
othermenu.
MENU#7
-DIGITALTENThS
Thedigitalsonar displays
thebottom
depthin
wholenumbers
whentheZ-7200 isfirstturned on.
Todisplay
the
depthIntenths ofa
foot,selecttheDIGTENTHSmenu.
TheZ-7200 will displaytenths ofa
footdownto99.9feet. Below this
the
depthdisplaywillautomatically
revertto
wholenumbers. Toselect
theDIGTENTHSmenu,pressboth
arrow
keysintheRANGEsectionat
thesametime.Thenpress the
up
or
down arrow keys in the RANGE
section until menu #7 displays.
Nextpress the
up
ordownarrowsin
theALARMsectionofthe
keyboard
toturntenthsonoroff. Waitseveral
secondsforthemenutodisappear
orpress theAUTO keytoactivate.
Tochange menus,usethe
arrow
keys intheRANGEsectionon
the
keyboard. Toselectan
itemfromthe
menu, usethearrow
keys
Inthe
ALARM section. Onceyou makea selection, press the AUTO keyto
activatetheselection. Or, switchtoanothermenu to access another
feature. Oncealloftheselectionsare made,pressthe
AUTOkeyand all
selectionsonallmenuswillbeactivated.
Foradetaileddescription ofthe
menus, seethe
following.
— - //$) tV/TV
-. - 2-
0 0
SOFT
6
a - FQ.tu
— V
—.
10 )
aaN9IT/V1TV4_ —
o - -T 0
4' •1
B FJ Lfl
Cdk E
2L. RT "a
J
a
'B
-4
TENTHSOFF
-,
0
.;
.2.
0
TENTHS ON
NSJTIV(1V
p 0•
—
iy!
10
MENU#2-DISCRIMINATION
High
noiselevels
displayedonthescreencanobstructtrue
target
echoesandmakeithardtointerpretthe
display. Noiseisdefined asany
undesiredsignal. Itis
causedby eitherelectricalormechanicalsource,or
acombination ofthetwo.
TheZ-7200 has Discrimination whichiseffective in eliminating
noise
signals. It processes allincoming echoes,determineswhichones
arenoiseand eliminatesthem.Thenit
displaysonlythetruetarget
echoes.
16
a
16
24
40
21
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4
- o i: C'FF
A - FOR NO
CHHI46E
PRESS
AUTO
—S
Tochange theDiscrimina-
tionlevel, press both arrow keysin
the
RANGEsectionat
thesametime
todisplay
menu#1.Next,pressthe
up arrow key until menu #2 ap-
pears. Thecurrent Discrimination
levelisdisplayed inthe
upper
halfof
thescreen. Itcanbeadjusted from
0(off) to10(high). WhentheZ-7200
Isturnedon,theDiscriminationlevel
is 1. Use thearrow keys in the
ALARMsectiontochange
the
level.
Oncethedesired level isset,press
theAUTO key toactivate it.
LARGE DIGITAL
Lj$FiVflV —
o -- 0
n-fl
A -
S.
• ft.
DISCRIMINATION: OFF
' -* —
r4
p.
:<f r.I
.-.
DISCRIMINATI0NPROPER SETTING
— J !li
o -hL2-:.
—. -t S.F
2 uIc;!THL. -
— SIZE
LiPGE
MENU#6
-DIGITALSIZE
The digital depth display
hastwosize selections:small and
large. When the Z-7200 is first
turnedon, the depth Is displayed
withthesmallnumbers. Tochange
toadifferentsize,pressboth
arrow
keys inthe RANGEsection
atthe
same time. Then presstheup
or
down arrow keys in the RANGE
section
untilmenu6
displays. Next
pressthe
upordownarrows in the
ALARM section ofthe
keyboard to
select the desired digital number
size. Wait severalseconds forthe
menu to disappear or press the
AUTOkeytoactivate.
ci T
L-
t O•F
2 DiSC: I
-
C:HO0SE
u—lu
1.
FOR NO
CH1C4E
PRESS
--.-. 1--
SMALLDIGITAL
40
24
20 17
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MENU#3-Sec
(SURFACECLARITY
CONTROL)
The
markings—ornoise--at
thetopofthedisplaycanextend
many
feetbelowthe
surface. This
interfereswithfish
signals
andother
targets. These markings areSur-
face Clutter and are caused by
wave action, boat
wakes, bait
fish,
temperature inversions, and other
reasons.
fN3f1IVl3'
— T r
o P
kF1
___ a
)FF
0 II[ tQp
ALTO A
j t [p:
1 CITL
nL ciE' CE
4
FL.
S
MENU #4
-DIGITAL
Thismenuturnsthe
digital
depthdisplayoffandon. Whenthe
Z-7200Isturned on,thedigitaldis-
playison. Toturnitoff, press both
arrowkeysintheRANGE
sectionat
thesame time. Then press
theup
arrow key until menu #4appears.
Use thearrow keys intheALARM
section toturnthe
digital
offoron.
PresstheAUTO
key
toactivateyour
selection.
MENU#5
-DIGITALAVERAGE
Thedigital sonar used in
the
Z-7200Isahighly sensitive de-
vice
thatgivesrapidupdates ofthe
water's depth. Under mostcondi-
tions,
thebottom contour
changes
soquick
thatthe
display
appearsto
"jitter". Inother words,
the
display
will changesoquickly
thatitcanbe
difficulttodeterminethe
actual bot-
tom
depth. To minimizethiscondi-
tion,theZ-7200 averagesthe bot-
tomreadings
betweennarrow
para-
meters and displays the result.
WhentheZ-7200 Isfirstturnedon,
averagingisenabled. Toturnitoff,
select menu #8by pressing both
arrowkeysInthe
RANGEsectionat
thesametime. Thenpress
the
up
or
down arrow keys in the RANGE
section untilmenu8
displays. Next
presstheupordownarrowsin the
ALARMsection ofthekeyboard to
turnaveraging onoroff. Waitsev-
eral secondsforthemenutodisap-
pear
orpress
theAUTOkey toacti-
vate
yourselection.
19
:___bsITlvIT —
H
Use
Surface
Clarity
Control
(8CC) to reduceor eliminate sur-
face
clutter. 8CCvariesthe
gain
of
thereceiverbetween eachtransmit
pulse, whilethereceiver is"listen-
ing"forthereturnechoes. The
gain
is the lowestfor echoes nearthe
surface. Itgradually
increases as
the
depth
increases. Themaximum
depththat 8CCwill affect isthree
quarters of the selected depth
range. Forexample, withmaximum SCC,ona0
to60foot range, 8CC
wouldhave aneffectfromthe
surface to45feet.
8CChastenlevels ofadjustment. Turning theZ-7200onauto-
maticallysets8CCtolevel 1. Tochangetoadifferentlevel, pressboth
arrow
keys
IntheRANGE
sectionatthesame
time,
then
press
the
up
arrow
keyuntilthe
8CCmenuappears. Thenpress
thearrowkeys inthe
ALARM
sectionforthedesired8CC
level. Thenpress
theAUTO
key
to
activatethe
new8CC
level.
r—L
18
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