Eagle Power II User manual

p
and
Magna II Plus
INSTALLATION AND OPERATION
INSTRUCTIONS
LITHO IN U.S.A. 988-0106-56 EAGI 1TM
Magna II
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TABLEOFCONTENTS
INTRODUCTION .1
INSTALLATION .1
POWER CONNECTIONS 2
SPEEDTrEMPERATURE SENSOR 3
KEYBOARD BASICS 4
DISPLAY 5
MENUS 5
OPERATION 6
AUTOMATIC 6
RANGE 6
ZOOM
-Automatic Operation 7
ZOOM
-Manuai Operation 8
SENSmVITY 9
GRAYLINE®
FISH ID 10
CHARTSPEED 11
DISPLAY MODE 12
ALARMS 14
FISHALARM 14
DEPTHALARM 15
LAMP 16
FEET/METER 16
DISPLAY CONTRAST 16
ASP (Advanced Signal Processing) 17
SIDE
SCAN Is
SIDESCAN
-RANGE 18
SIDE
SCAN-ALARM 19
MENUSUMMARY 19
TRANSDUCERS ANDCONE ANGLES 20
SIGNAL
INTERPRETATION 21
FISHARCHES 22
WATER TEMPERATURE ANDTHERMOCUNES 23
SURVEYINGA
LAKE 25
BAITFISH 25
SONAR TROUBLESHOOTING 26
Copyright © 1991, 1990 EagleElectronics
Allrightsreserved.
Allfeatures
andspecifications subject
toChange withoutnotice.
Allscreens inthismanual aresimulated.
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4.Theboatmustbemoving ata
slowtrollingspeed
toseefisharches. litheboat
ismotionless,fish
stay
Inthecone,showing
onthedisplay
as
straight
horizontal
lines.
ELECTRICAL NOISE
A
majorcause
ofsonar
problems iselectrical
noise. Thisusually appears
onthe
sonar's displayasrandom
patternsofdots orlines. In severe cases, it can
completely
coverthescreen withblackdots,
orcause theunitoperateerraticly,
ornotatall.
Toeliminate orminimize theeffectsofelectrical noise, firsttry
todeterminethe
cause. Withtheboatatrestinthewater,
thefirst
thingyou shoulddoisturnall
electricalequipment onthe boatoff. Makecertain the engine isoff, also. Turn
yourMagna
on,thenturnoffASP (AdvancedSignal Processing). Thereshould
bea steady bottom signal onthe display. Nowturn oneach pieceofelectrical
equipment ontheboatandviewtheeffectonthesonar's
display. For
example,
turnonthe
bilgepumpandviewthe sonardisplayfor
noise. Ifnonoiseispresent,
turnthepump off,
thenturnonthe
VHFradioandtransmit. Keepdoing
this until
allelectrical equipment has beenturnedon, theireffectonthesonar display
noted, thenturnedoff.
If
youfindnoise
interference fromanelectricalinstrument,trolling
motor,
pump,
orradio, tryto isolate the problem. You canusuallyre-route the sonarunit's
power cable andtransducer
cable away fromthe wiringthat Is causing
the
interference. VHFradioantenna
cablesradiatenoisewhen
transmitting, sobe
certaintokeep thesonar's
wiresaway fromit. You
may
needtoroutethesonar
unit's
power
cabledirectly tothebattery
toIsolateitfrom
otherwiring
onthe
boat.
If nonoisedisplaysonthe sonarunit fromelectrical equipment, then make
certain everything except
the sonarunitisturnedoff, then stallthe engine.
Increasethe RPM
withthegearshift in neutral. Ifnoiseappears onthe display,
theproblemcouldbeoneofthree
things;sparkplugs, alternator, ortachometer
wiring. Tryusingresistorsparkplugs, alternatorf
liters,or routing
thesonarunit's
power
cableaway from
enginewiring. Again,routing
thepower cable
directly
to
thebatteryhelpseliminatenoise problems. Makecertain tousethein-line fuse
supplied withtheunitwhen
wiring
the
powercabletothebattery.
When nonoise appears onthesonarunit afterall oftheabovetests,thenthe
noise sourceis probably cavitation. Manynovicesorpersonswith limited
experience make
hastysonarinstallations which functionperfectly in shallow
water,orwhen
theboatisatrest.In
nearly
all
cases,thecause ofthemalfunction
willbethelocation and/or angle
ofthe transducer. Thefaceofthetransducer
mustbeplaced inalocation thathasasmoothflowofwater
atallboat
speeds.
Read
yourtransducer
ownersmanual
forthe bestmounting position.
INTRODUCTION
Thank
you
for
purchasinganEagle
sonar.
YourMagna
IIor
Magna
IIPlus
isahighquality sonar
designed forboth professional andnovice fisher-
men. Theseunits
haveanautomatic featurethatfindsand
displays
the
bottom,fish,structure, andmore! Allyouhave
todois
press
theonkey.
However, ifyou
wishtofinetunethe unit,all
youhavetodoispress the
menu key. TheMagna
serieshaspowerful featuresavailable through
easy-to-use menus.
Toget startedwith
yourEagleunit,
firstreadtheinstallation
section.This
iswhereitallbegins. Improper
installation cancause
problemsdownthe
road.After
you've
read
the
instructions, installthe unit,
thenreadtherest
ofthemanual. The moreyouknow aboutyour unit,thebetter itwill
perform
foryou. Take
thismanual forreferencewhen
youhead forthe
water.
INSTALLATION
Mountthe
MagnaIIin any
convenient location,providedthere
is
clearance
whenit'stilted
forthebestviewing
angle. Holesinthebracket's baseallow
woodscreworthrough
boltmounting. Itmaybenecessary toplacea
piece
ofplywood onthebacksideofthinpanels
to reinforcethepanel.
Makecertainthere
isenough roombehindthe
unittoattachthe
power
and
transducer cables.
Drill a holeinthedashforthepowerand transducer
cables. Thebest
location
forthisholeisimmediately underthe
gimbal
bracket.Thisway,
thebracket covers thehole. The smallesthole both thepowerand
transducercablescan
pass
throughisoneinch.However,youcan't pass
apower
ortransducer connector
and another cable
through
aoneinch
1
28
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hole. Therefore,
after
drillingthe hole, pass
the
transducer connector
up
through
theholefromunderthedash. Then
drop
the
power
cabledown
from
thefrontsideofthedash.Slidethebracket overthe
hole,
thenroute
thetransducer
and powercables outthe slots in thebracket. Finally,
fasten
thebrackettothedash.
POWER
CONNECTIONS
TheMagna IIworksfroma12voltDC systemonly. Forthebest
results,
wnthepower cable
directly
totheboat's
battery. Keepthe
power
cable
away
fromotherboat
wiring, especiallythe
engine'swires. Thiswillgive
thebestisolation fromelectrical noise. Ifthe
supplied
cableisnotlong
enough
toreachthe
battery, splice
#18
gauge
insulatedwiretoit. Youcan
attachthe
power
cabletoanaccessory
or
powerbuss, however,youmay
have problemswith electrical interference. See page 28 for more
information onelectrical noise.
Weakbottom
echo,digital readingserratic, ornofishsignals(cont.):
2.Electricalnoisefromthe
boat'smotorcaninterferewiththesonar. Thiscauses
thesonartoautomatically increase itsDiscrimination ornoise rejection feature.
Thiscan
causetheunittoeliminate
weakersignals
suchasfishorevenstructure
fromthedisplay.
3. Thewatermay bedeeper thanthe sonar's ability tofindthe bottom. Ifthe
sonar
can'tfindthebottom
signal
whileit'sintheautomatic mode,thedigital
will
flash
continuously.
Itmaychange
therangetolimitsfargreaterthanthewater
you arein. Ifthishappens,
place
theunitinthemanual
mode,thenchange the
rangetoarealistic
one,
(for
example, 0-100feet)andincreasethe sensitivity.
As
you moveintoshallower water,abottom
signal
should appear.
4. Checkthe batteryvoltage. If
thevoltage drops, theunit's
transmitter
power
also
drops, reducing itsability tofindthe bottom ortargets.
Bottom echodisappearsathighspeedsorerraticdigitalreadingorweak
bottom echo whileboatIsmoving
1. Thetransducer
maybeinturbulentwater, Itmust bemounted in asmooth
flowofwaterin orderforthesonartoworkatallboat
speeds.Airbubblesinthe
water
disrupt
thesonarsignals,interfering withitsability tofindthe bottomor
other
targets. Thetechnicaltermforthis is'Cavitation'.
2.Electricalnoisefromtheboat'smotorcaninterferewiththe
sonar. Thiscauses
the
sonartoautomatically increaseits Discrimination ornoise re]ectionfeature.
Thiscancause theunit
toeliminate weakersignals suchasfishoreven
structure
fromthe
display. Tryusingresistorsparkplugs
orrouting
thesonarunits
power
and
transducercables
away
fromotherelectrical wiring ontheboat.
Nofisharches when theFishIDfeatureIs
off:
1. Makecertain transducerispointingstraight
down. Thisisthe mostcommon
problem
ifapartial archisdisplayed. SeetheFishArchsectioninyour
owners
manualformoreinformation.
2. Thesensitivitymaynotbehighenough.Inorderfortheunittodisplay
afish
arch,ithastobeabletoreceive thefish'sechofromthetimeitenters thecone
untilitleaves. ftthesensitivity isnot
highenough,
theunit
displays
thefishonly
when itisin thecenterofthecone.
3. UsetheZoom feature, Itismucheasierto
display
fisharches whenzoomed
inonasmallrange ofwaterthanalarge
one. For
example, youwillhavemuch
betterluck
seeing
fisharches witha30to60foot
range thana0to60footrange.
This
enlarges the targets, allowing
thedisplay toshowmuch more detail.
2 27
MAGNA II
BLAcK 3
amp
FUSE
12VOLT
BATrERY
MACNAII
PLUS 3amp
FUSE
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IMPORTANT
SERVICE INFORMATION!
Ifyour unitisnot
working,
orifyouneedtechnical help,please usethefollowing
troubleshooting section
before
contacting
aservicecenterorthefactorycus-
tomerservice
department. It
may
save
you
thetrouble
of
returningyourunit.See
theHowToObtain Service sectionon page29ifyou needservice.
SONAR TROUBLESHOOTING
Unitwon'tturnon:
1. Checkthepower
cable'sconnection attheunit. Also check
the wiring.
2. Make certain thepowercableiswiredproperly. Thered wireconnects
tothe positive battery
terminal,
blacktonegative orground.
3. Checkthefuse.
4.Measurethe
batteryvoltage
attheunit's
powerconnector.
Itshouldbeatleast
11volts.ifitisn't,thewiringtotheunitis
defective,thebattery
terminals orwiring
ontheterminals are corroded, orthe battery needscharging.
Unit
freezes,
locksup, oroperates erratically:
1. Electricalnoisefromtheboat's
motor,trolling
motor,oranaccessorymay
be
interferingwiththesonarunit.Re-routing thepower
andtransducercables
away
fromotherelectrical wiring ontheboat mayhelp. Routethesonarunit'spower
cable
directly
tothe
battery
instead
ofthrough afuseblockorignition switch
2. Inspect thetransducercableforbreaks,cuts,
orpinched wires.
3. Check boththe transducerand powerconnectors. Make
certainbothare
securely
plugged intothe unit.
Theseunitshavereverse
polarityprotection. Nodamage
willoccurifthe
power
wires arereversed. However,theunitwillnot
workuntilthewires
areaftachedcorrectly.
SPEED/TEMPERATURE SENSOR INSTALLATION
-
MagnaIIPlus Only
Mountthe
speed/temp sensorontheboat'stransom
in
alocation where
theflow ofwater is thesmoothest. There should be a minimum of
turbulenceand airbubblesinthechosen location. Theport(left)
sideof
the
transomispreferred, however,thestarboard (right)sidecanbeused
if
necessary. Donotmountthe speedsensorbehind
strakes,ribs,orthru-
hull fittings. Thesewilldisturbtheflowofwatertothe
speedsensor. In
atypicalinstallation, thespeedsensor is mounted sixtotwelveinches
fromthecenterlineofthehull. Thesensormust
always
beinthewaterto
functionproperly. Makecertain thechosen
locationisin thewatereven
athighspeed orwhentheboat isonplane.
Once
you
determinethe
properlocation,place
thesensoronthetransom.
Makecertainthesensor's bottom isflushwiththe
bottomofthehull. Mark
thetransomin fourplaces, twoineach slot. Drilla5/32"
mounting hole
ateachlocation. Mountthesensortothe
huHwithfour#10stainlesssteel
screws. Use a
goodgradeofcaulkingcompound
tosealthescrews.
Adjust
thesensorso itisflushwiththe
bottomofthehull and
tighten
the
screws.
Weak
bottom
echo, digitalreadings
erratic,
ornofish
sIgnals:
1. Make
certain transduceris pointingstraight down. Clean thelace ofthe
transducer. Oil,dirt, andfuelcancauseafilmtoformonthe
transducer, reducing
itseffectiveness. If the transducerIs mountedinsidethe hull, besure it is
shooting throughonly
one
layer
of
fiberglass andthatitis
securely
bonded
to
the
hull. Do NOTuseRNsilicone rubberadhesive orMarinetexm.
Ifthebaseofthetransomhasaradius, fillthe
gap
between thetransom
and thesensorwith caulking compound. Thiswillhelpinsureasmooth
waterflow.
Routethesensorcable
tothein-lineconnectoronthe
Magna
Plus'
power
cable. Thespeed/temp sensor
isnow ready foruse.
3
26
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KEYBOARDBASICS SURVEYINGALAKE
Theunitsoundsatonewhen
youpressanykey. Thistells you
theunit
hasaccepted acommand.
ON/CLEAR
Usethiskey toturntheuniton. Italsoclearsmenu selections andthe
menus fromthescreen.
OFF
Thiskeyturnstheunitoff.
MENU
TheMagna
IIandMagna II Plus have
many
menus offeatures
thatare
accessedwiththiskey.
UPand DOWNARROWS
Usethesekeys toadjustvirtuallyevery featureandfunctionontheunit.
Usethesekeys toadjust thesensitivity, chart speed, range, andmore.
I
Themostsuccessful anglers on anybodyofwaterare those whofish it
dayafterday and yearafteryear. Eventually, they learnthehotspots
thatproducefishconsistently. They discover
through experiencewhere,
and at whatdepth,they can expect to findthefish theywantat any
season. And
theyrealizethattheseproductiveareaschangethroughout
the
yeardepending onwater level, temperature, food, and otherfactors.
WiththeMagnaII,anyone
caneliminate
guesswork and
concentrate on
theareaswherefish arelikely tobe. Even ifit'sthefirsttimeonthelakel
Themost efficient
way tobecome acquainted with abody
ofwateristo
survey
itwith
yourMagna
Il. Startwith a
map ofthe lake,ifpossible, and
indicatethepromising spots inrelation tolandmarksonshore.
Asyougo about yoursurvey, your Magna IIwilltellyouthedepth and
typeofbottom. Itwillalsoreveal suspended fish.
Keepafewmarker buoys
intheboat, ready totossoverboard. When
the MagnaII indicates aschool of fish, throwthe buoyout. Withthe
school thusmarked, youcan makeyourturnand come backtofish in
exactly therightspot. Thisisessential when
you're
farfromshore ona
biglake. Unless youmark the school offish when you'reover it, you
maynotbeabletofinditagain.
BAIT FISH
The importance ofbait fishtosuccessful
fishing can'tbeover-empha-
sized. Theyaretheprinciple
food ofallgame fish inmost waters.
Baitfish are theplankton feeding forage fish, such as minnows and
shad. Baitfish canalsobetheyoungofgame fish, suchas crappies,
bluegill, andbass.
NOTE:Theup arrow
key
alsostops and startsthechartwhennomenus
aredisplayed. Inotherwords,anytime youwishtostop thechart, first
makecertain nomenuisonthescreen. Then
press
the
up
arrowkey. The
chartwillfreezeandtheword"STOP"
appears atthe toprightportion
of
thescreen. Tostartthe
chart,press theuparrow key again.
Most bait fish concentrate withinfivefeetofthesurfacewheresunlight
promotes the growthofthe
plankton onwhich they
feed. Onemethod of
fishing istousethe Magna
IItofindthebaitfish first. Withthe Fish ID
featureoff, a school of baitfish willlook like a"cloud" onthedisplay.
Usually, gamefishwill be nearby, often directly beneath the school of
baitfish.
-'I
4 25
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DISPLAY
-General
Thelights flashforabout ten seconds whentheMagna
II isturnedon.
Threemenus appear, one aftertheother. Themenusarethelights
(LAMP), feet-meter selection (FEET/METER), andcontrastadjustment
(DARK/LIGHT). Toturnthe lights
on,press
the
uparrow key. Toswitch
fromfeettometers, press thedownarrowkeywhenthepropermenu
appears. To adjust
thecontrast, wait forthe DARK/LIGHT menu to
appear. Now press
the
uparrowkey
todarkenthe
screen,thedownarrow
tolighten it. Themenus disappear
afterafewseconds. If
youdon'twant
towait,press theON/CLEAR keytoclearthemenus fromthescreen.
Whenthe
Magna
IIisfirst turned
on,
the
displayappearssirnilartotheone
below. TheunitisintheautomaticmodeandtheFishIDfeatureison.The
depth rangedisplays ontheleft sideofthescreen. Inthisexample, the
rangeisfrom0to60feet. Thedigitalbottom depthdisplayshowsatthe
topleftportion
ofthescreen.
Thetemperature of waterin the lake is seldom constantfromtopto
bottom. Layers ofdifferenttemperatures form, and thejunction of a
warm and cool layerofwateris called athermocline. The depth and
thickness ofIhethermoclinecanvarywiththeseason ortimeofday. In
deeplakestheremay
betwoormore atdifferent
depths. Thermoclines
areimportanttofishermenbecause
theyareareaswherefishareactive.
Many
times
bait
fish willbeabovethethermoclinewhile
larger
gamefish
willsuspend inorjustbelow it.
TheMagna IIcandetectthisinvisible
layerinthewater, butthesensitiv-
itywillprobably have tobeturned uptoseeit.
MENUS
El-
373FT
The
Magna
IIandMagnaIIPlususe
menustoguideyouthroughtheunit's
functionsandfeatures. Themenukeyaccessesthese
features,allowing
youtocustomizetheunittoyourparticular needs andwaterconditions.
Allyouhavetodotoleaveonemenu andenteranotheris
press
themenu
keyrepeatedly. If youever get
lostin themenus, simplypress theON/
CLEAR
key. Thisclearsthemenus fromthescreen.
SURFACE LAYER
ABSORBS HEAT
FROMTHESUN
EPILIMNION
750
THERMOCLINE
MOSTpRbDucTIvI
ZONE FORFISHING
VARIESINDEPTh
DUETOWIND.
560
500
4C
470
24 5
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Menuschangedepending
on
themodethe
unitisin. For
example, lithe Very
smallfishprobably
willnotarch atall. Mediumsized fish willshow
automaticmodeisturned
off,
the
sensitivity menuchanges
from"AUTO
SENS"
to"MAN SENS."Other
messages mayappear
inmenuboxesor
new menus canappear, againdepending on
previous selections.
OPERATION
AUTOMATIC
WhentheMagna II isfirstturned on, the
automatic featureisenabled. This feature
automatically adjuststheunit's range and
sensitivity according towaterconditions. It
alwayskeeps
thebottom depth displayedin
thelower
portion
ofthescreen.
Toturntheautomatic feature
off, press the
menu key until theAUTO/MANmenu ap-
pears.Nowpress
thedownarrowkey. This
highlights
theletters"MAN." Theunitisnow
in
themanual mode.Waita
fewsecondsand
themenuwillscrolloffthescreen's left
side. ____________________
Pressing theON/CLEAR keyalsoclears it.
Toturntheautomaticleature
onagain,repeattheabove
steps,exceptthis
timepress theuparrow key.
a partial arch, or ashapesimilar to an arch ifthey'rein deepwater.
Large
fishwillarch, butturnthe
sensitivityup
in
deeper
watertoseethe
arch. Because of water conditions, such as heavy surface clutter,
thermoclines, etc., the sensitivity sometimes cannot be increased
enough toget
fisharches.
One of the bestways to get fish arches is to expand or "zoom" a
segment
ofthewater. For
example, from45to60feet. Thesmallerthe
segment,thebetterthescreenresolutionwillbe. Theeasiestwaytodo
thisonthe
Magna
IIiswiththeZoomfeature. Thisfeatureexpands the
echoes, making it easierto seedetail. Forthebestresults, turnthe
sensitivity upas highaspossible without getting toomuchnoiseonthe
screen. Inmedium todeep water,thismethod shouldworktodisplay
fisharches.
Ifyouseefishsignalswhentheunitisinthemanualmode, butdon't
get
fishsymbols whentheFish1.0.featureison,tryincreasingthesensitiv-
ity
RANGE WATER
TEMPERATURE ANDTHERMOCLINES
Youcan'tadjust the
rangewhentheMagna IIisin theautomatic mode.
Itisadjustable whentheunitisin themanual
mode,
however. Todoso, firstput theunitin
themanualmode. Nowpress theON/CLEAR
keytoclearthescreen.
Then
pressthe
menu
keyuntilthe"RANGESEL"menuappearsas
shown. The current range shows at the
bottomofthemenu. Inthiscase, the
range
is60feet. Nowpresstheuparrowkeyto
decreasethe range, thedown arrow key
increasesthe range. After you selectthe
desired range,press theON/CLEAR keyto
clearthe
display. Ifyouwaitafewseconds,
itwillautomatically clear.
Watertemperature has an important-if not controlling-influence upon
the activities of all fish. Fishare cold blooded and their bodies are
always
thetemperature ofthesurrounding water. Duringthewinter,
colderwater slows down their metabolism. At this time, they need
about afourthas much foodastheyconsume in
thesummer.
Mostfish don't spawn unless thewatertemperature is within rather
narrow
limits. Thesurface temperature meterbuiltintothe
Magna
Plus
helps identify thedesired surface water spawning temperatures for
variousspecies. Trout can't survivein streams that get toowarm.
Bass and otherfisheventually
dieoutwhenstockedinlakesthatremain
toocoldduring thesummer. Whilesomefish haveawider
temperature
tolerance
than others, eachhas acertainrangewithin whichittriesto
stay. Schooling fish suspended overdeepwaterlieatthe levelthat
provides thistemperature. We assume theyare themost comfortable
here.
IJTO
MAN
373FT 't
6 23
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FISH ARCHES TheMagna
IIandII Plus havethe
followingranges:
Fisharchesarecreated whenthe coneof soundpasses over afish.
The distance to afish whenthe conefirst strikes it is shown as "A"
below. When thecenterofthe cone strikes thefish, thedistanceis
shorter as shown "B". As the cone leaves the fish, the distance
increases
again asshown in"C". ZOOM
Thezoomfeature
enlarges allechoes onthescreen. Iftheunitisinthe
automatic mode, ittracksthebottom
signal, alwayskeeping itnearthe
bottomofthescreen. Thislets you seesmall detail, atthesametime
enlarging
allechoesthat
appear
onthescreen. Theunitdoesn'ttrackthe
bottom
in
themanual mode, andtheadjustments areslightly different.
Zoom-Automatic
Operation
Tozoomthe
display, firstpress
theMENU key untiltheRANGE/ZOOM
menuappears. Now
pressthe
downarrowkey.Thisswitchestheunitinto
thezoommode. Anewmenu immediatelyappears asshownonthe
right.
Thisisthezoomsizemenu.Zoomsizeisthedistancebetween the
upper
limitandthelowerlimit. Theupper limitshowsatthe
top
leftcornerofthe
WhentheFish l.D.mode isoff, the
depth
ofthewaterwillaffectthesize
and shape of thefish arch due to the cone angle diameter. For
example, ifthe conepassesover a fish in shallow water,the signal
displayed
onthe
Magna
II maynot archatall. Thisisduetothenarrow
conediameter andtheresolution limitations ofthe
display.
screen. Thelowerlimitisinthebottomleftcorner. For
example, ifthe
upperlimitis40feetandthelowerlimitis70
feet, thezoomwindowsize
is30feet. Theword'TRACK"
appears
inthismenuwhen
you
firstactivate
thezoom. Thismeans theMagnaII istracking thebottomin azoom
window,
always keeping itonthe display.
Pressthe
uparrowkey
todecreasethezoom size,press the
down
arrow
key
toincrease thezoom size.
22 7
BOATS DIRECTION OFTRAVEL
10,20,40, 60, 120,240,480, and900feet.
and
5, 10,20, 40,60,100, 200, and300 meters.
I
37jFT act
A
RANGE
a Jr
B C
ZI1——20
3IAFT
ZOOM
SIZE •c
TRACK
C
a
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The
MagnaIIandII Plushavethe followingzoomranges: Both8degreeand 20 degree transducers giveaccurate bottomread-
10,20,30,60,120,240, and480feet
and
5, 10,20,30,50,100,and150 meters.
ings, even thoughthebottom signal ismuch wideronthe20 degree
model. Thisis because
youareseeing moreofthebottom. Remem-
ber,theshallow edge
ofthesignal shows youthetruedepth. Therest
ofthe
signal
tells youwhether
youareoverrocks, mud, etc.
Whentheunit is switched into the zoom
mode, theletters"ZM" appear
atthe
top
of
thescreen. Thezoomwindowsize
displays
inthe
topright
cornerofthescreen.
Toturnthezoomfeature
off,
pressthemenu
keyuntiltheRANGE/ZOOM menu appears.
Now
press
the
up
arrow key. Thisswitches
theunitintothe
rangemode,whichturns
the
zoomfeatureoff.
ZM——20
3IAFT
ZOOM
SIZE 4C 'et
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SIGNALINTERPRETATION
YourMagna II givesanaccuratepicture ofthebottom that
your boat is
passing. A bottomoffirm sand,gravel, shell, or haitIclay returnsa
fairlywidesignal. Iftheautomatic mode is offand thesignalnarrows
down,then it means that you havemoved overamud bottom. Mud
absorbs the soundwave and returns a weak signal. Turn up the
sensitivitytoseeabetterbottom signal.
Big rocksor stumps
on asmooth bottomsend backsignals above the
bottomlevel signal. Theheight ofthesignal depends
onthetarget's
height. Asyoupassoverapost, itshould be
clearly visibleasashort
lineextending abovethebottom signal.
Zoom-ManualOperation
A steepslope returns a wide signal, the steeper the wider. Signals
returned fromahighunderwater cliffareusuallythewidestofall.
Tooperate thezoomfeature
when
the
Magna
IIisinthemanual mode,
first
press
themenukey. Then
press
thedownarrowkeyintheRANGE/
ZOOMmenuto
placetheMagna
inthezoommode.Thezoom
sizemenu
automaticallyappears
next. Youcan
change
the
zoomsizebypressing
the
up
ordownarrows. Afteryou selectthedesired zoom
size,press
the
menu key until the"MOVEZOOM"menu
appears. Thismenulets you
movethezoom
window
up
ordowninonefootincrements by
pressing the arrow keys. Thus, you can
move the zoom window up towards the
surface,
downtothe
bottom,
oranywherein
between. Thewindow
stays
where
youput
it. Itdoesn'ttrackthebottom signal.
Toturnthezoomfeature
off,
press
the
menu
keyuntiltheRANGE/ZOOMmenu appears.
Nowpress the
up
arrow
key. Thisswitches
theunitintotherangemode, whichturnsthe
zoomfeatureoff.
ZM——20
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TRANSDUCER CONEANGLES SENSITIVITY
The sound waves fromthe transducer spreadout intothewaterin a
coneshaped beam. Thislooks much likethebeam fromaflashlight.
Theangle betweentheoutside
edges ofthecone istheconeangle.
Eagle offersachoice oftransducers witheitheran8or20degree cone
angle. Thetransducersuppliedwiththe Magna
II hasa20degree cone
angle. Typically,widecone angletransducers (20degrees) areidealfor
operating in shallow to medium waterdepths. The20 degreecone
angleallows you tosee moreoftheunderwater world. In 15 feetof
waterthe20degreeconecoversanareaaboutsixfeetacross. The8
degree transducer covers only aboutatwofootcircle.
The 20 degree transducer is almost alwaysthe bestto use in fresh
water, the8degree mostly in saltwater. Inadeep water environment,
(300feet-fresh water, 100feet-salt water)
thenarrowconeangleis
moredesirable. Since thesoundenergyis concentrated in asmaller
area,itcanpenetratetomuch
deeperdepths.
Thesensitivity menuletsyoucontroltheunit'sability topickup echoes.
A low sensitivity level excludes much of thebottom information, fish
signals, andotherdetail. High sensitivity settings
lets youseefeatures,
butitcanalsoclutterthescreen withnoiseandotherunwanted
signals.
Typically,thebest sensitivitylevelshowsa good,solidbottom signal
with
grayline.
TheMagna IIadjusts the
sensitivity leveltokeep
asolidbottom
signalon
thescreen. Itaddsalittleextrawhenit'sintheautomatic mode. This
gives
itthe
capability toshowfishand otherdetail. However,
situations
oäcu•r
whereitbecomesnecessarytoincreaseordecreasethe
sensitivity
level.
Typically, this occurswhen youwish
toseemoredetail, soyouneed to
increase the
sensitivity. Theprocedure
toadjust itisthesamewhether
theunitisintheautomatic ormanual mode.
To
changethesensitivitylevel,
firstpressthe
menukeyuntilthe
sensitivitymenu appears.
If
theunitis inautomatic, the menu shows
"AUTOSENS."Otherwise, themenushows
"MANSENS." Now
press
the
uparrow key
toincrease the
sensitivity,thedownarrow
to
decreaseit. A verticalbar
graph
in
the
menu
box shows the sensitivity level. Echoes
scrolling
onto thescreen will also showthe
effectsofthe
sensitivitychange. If youreach
themaximumorminimumsensitivity level, a
tonesounds
alerting youtothelimits.
Afteryou'veadjusted theunittothedesired
sensitivity level,press
theON/CLEARkeytoclearthedisplay. If
you
wait
afewseconds, itwillautomatically clear.
GRAYLINE
Graylinelets
you
distinguishbetweenstrong
andweakechoes. It"paints"
gray on targets
thatarestronger than a presetlevel. Thisshowsthe
differencebetween ahardorsoftbottom, largefishversus smaller
ones,
orrocksandbrush onthebottom. For
example, a soft,muddy,orweedy
bottom returnsaweaker
signal which showsanarrow orno
gray
line. A
hardbottom returns a
strongsignalthat causesawide grayline.
50'
100'
150'
200'
8DEGREE
20
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Ifyouhavetwotargets ofequalsize,onewithgray andtheother
without,
the
targetwith grayisthe stronger
echo. This
helpsdistinguish fishfrom
structure, orthe
largerfishfromasmallerone.
Grayline
®
is
adjustable. Sinceitshowsthedifferencebetween strong
and
weakechoes,
changingthe
level
mayrequire
adifferent
sensitivityselling.
Tochange the
Grayline
level, first
presstheMENUkeyuntilthe Grayline
menuappears. Now
presstheuparrowkeyto
increasethe
level,
thedown
arrowtodecreaseit. Thebargraph inthe
Grayline menuboxshowsthe
levelofGrayline nowin use. Echoes scroll-
ing
ontothescreen willalsoshowtheeffects
of theGraylinechange. If you reach the
maximumorminimum level, atonesounds
alertingyoutothelimits.
Thelevelchosen
bytheMagna
IIwhenit's
firstturnedon isusuallyadequate formost
conditions.Experiment with
your
unittofind
theGraylinesetting that'sbest.
FISH ID FEATURE
TheFish IDfeatureidentifiestargets thatmeetcertainconditionsasfish.
Themicro-computer analyses allechoesandeliminates surface clutter,
thermoclines, andotherundesirable signals. Inmost instances, remain-
ingtargets
arefish. TheFishID featuredisplays symbols onthescreen
in
place
ofthe
actualfishechoes. Therearefour
symbol
sizes:
tiny,small,
medium,
and large. Theseshow therelative size between targets. In
otherwords,
it
displays
asmallfish
symbolwhen
itthinks
atargetisa
small
fish,amediumfishsymbol
ona
largertarget, etc.
The micro-computer is sophisticated, but it can be fooled. It can't
distinguish between fish andothersuspended objects
suchas turtles,
submerged floats, air bubbles, etc. Individual tree limbs extending
outwardsfromagroupof limbs arethehardest
objects fortheFish ID
featuretodistinguish fromfish. You may see Fish IDsymbols onthe
screen
when,
in
fact,
therearenofish. Practicewiththe unitwhentheFish
IDfeatureisonandofftobecomemorefamiliarwithFishID.
Whenthe
Magna
IIisfirstturned
on,theFish IDfeatureis
automatically
turned
on,also.Toturnthisfeature
off,press
themenukeyuntiltheFish
IDfeature'smenu appears asshownbelow. Nowpressthedownarrow
SIDERANGEmenuappears. Now
pressthedownarrowkeyto
decrease
theside rangeorthe
up
arrowkey toincrease it. Theavailable ranges
in
sidescanmode are0-10, 20,40,60, and 120feetor0-10,20,40,
and
60 meters. Press the ON/CLEAR keyto
erase therangemenu fromthescreen or
waitafewseconds anditwillautomatically
clear.
SIDE SCAN
-ALARM
Thesidescan
featurealsohasanalarmthat
sounds whenaFish IDsymbolappearson
thedisplay. ThisiscalledtheSideAlarm
andisautomaticallyturned onwhentheside
scanfeature is enabled. Toturn itoff, or
backonagain,press theMENUkeyrepeat-
edly
whilethesidescanfeatureison.When
theSideAlarmmenu appears, pressthedownarrowkeytotumitoff,or
the
up
arrowkey toturniton.PresstheON/CLEARkeyto erasethis
menu
fromthescreenorwaitafewseconds and itwill automatically clear.
MENU SUMMARY
Themenus listedbelowareshowninorderasyoupresstheMENU
key
whilethe
Magna
IIisin thenormal modewithautomaticandFishIDon.
The order ofthemenus (and the menus themselves) will changeas
different featuresare selected, however thisisorder the menus are in
whentheunitisfirstturnedon.
t s
ZO a 'RANGE'
I SET I
IAUTOI
I BY I a SHI
ID
IOFF
4. ISIDEI
IOFFP
. P'
MAN
6. lDI9p
MODE
LHn 7.
I
I AUTO
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iI,r& 8.
I
I GRAYI
I LINEI
Iiw&I
9. ICHARTI
ISPEEDI
li''al 10.
FISH ii ISHALI
IALAR11I
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12.
IDEEPI
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I UFFI
13. ON 14. I I
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IMETERI
15. P6HTI
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10 19
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SIDE SCAN key.Thisturns
thefeatureoff. Toturnitback
on,repeat
theabove
steps,
The Magna II and MagnaII Plushavethe
uniqueability
toview
targets
outtotheside
of
theboat. Thisfeature iscalled 'sidescan"
and requires the
optional
ScanPactransducer
accessorypackage. TheScanPac consists
ofa
transducer,adjustable metal strap, and
a"'1"cable. Thetransducer attaches tothe
trolling
motorwiththe
adjustablemetalstrap.
The "'1"cableconnects boththe ScanPac
transducer and the Magna II's normal
transducer to the Magna II's transducer
connector. Seethe ScanPac's installation
instructionsformore detail.
Tousethe
Magna IIinthesidescanmode,
repeatedly press the MENU key until the
SideScanmenu appears. Now
pressthe up
arrow keytoturnthesidescanfeatureon.
Thescreenshown atright appears.
Target echoes appearas short, horizontal
linesontheleftside ofthescreen. Fish ID
symbols appear on the right side of the
screen whenthe unit'scomputer thinks a
groupofechoes arefish. When a Fish ID
symbol
appears, thedistancetiomthe
symbol
totheboatshowsatthebottomofthe
screen.
Inthe
exampleshown atright!afishsymbol
is27feetfromtheboat. After
thefishsymbol
disappears,the displayattheboffomofthescreen
reverts
tothe
digitaldepth
display. Seethescreen ontheleft. Thewater
depth
is 64 feet. This is the distancefrom the
bottom
to the depth sounding transducer,
nottheside scan. Byslowlyrotating your
trolling
motor,alarge areaaround theboat
canbescanned.
SIDE SCAN-RANGE
Therangeshowsonthesidesofthedisplay.
Remember,thisistherangeouttotheside
of the boat, not towards thebottom. To
change the range, pressthe MENU key
whiletheside scanfeatureis onuntilthe
but
press
the
up
arrow key instead.
TheFishIDfeature can'tbeusedwhenthe
Magna
IIisinthemanual mode. If
youturn
theautomaticfeature oft,
theFishIDfeature
willautomatically beturned off,also.
CHART
SPEED
Therateechoes scroll across thescreenis
called thechart speed. It's adjustable by
pressing themenukeyuntil the
chartspeed
menu appears. Chart speed issettomaxi-
mumwhenthe
Magna
IIisfirstturned
on.To
decrease
it,press
thedownarrowkey. Pressthe
uparrowkeyto
increase
the
speed again. ThebargraphintheChart Speed menu boxshowsa
graphofthe speed. Echoesscrolling ontothescreen willalso showthe
effectsofthechange. Ifyoureach themaximumorminimum level, an
warning
tonesounds.
To
stop
the
chart,firstclear
any
menufromthescreenbypressingthe
ON!
CLEAR key. You can't stop
thechartwhileamenu isdisplayed. Now
press theuparrow key. Thechartwillfreezeandtheword"STOP"
ap-
pears
atthe
topright portion ofthescreen. Tostartthe
chart, pressthe
uparrow keyagain.
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DISPLAYMODE
TheMagna IIhasthreedifferent screenmodes. TheMagna
IIPlushas
six. Tochange modes, pressthe MENU keyuntil the"DISP MODE"
(DisplayMode) menuappears. Thenpress theupordownarrow
keys
until thedesired modenumber appears. Themodes areas follows:
MACNAIIONLY
CHI1 (Chart#1)
Thisisthedefaultmode usedwhenthe
Magna
IIisfirstturnedon. Ithasthefol-
lowing features:
1.Automatic On
2.FishIDFeatureOn
3. DigitalDepth Display On
CHT2
(Chart#2)
ThisistheHighSpeed Scroll mode. Itshifts
the
chartspeedinto
highgear,sciolling
echoes
atahighrate. Ithasthefollowing features:
1. Automatic Off
2. FishIDFeatureOff
3. Digital
Depth Display Off
Thisisthe
digitalonlyscreen. Itshows the
digital depth display
atthe
topofthescreen
in
verylarge
numbers. The
shallowanddeep
alarm settings are displayedbeneath the
digitaldepth.Nochartshowson
thisscreen.
DEPTH FT
[60+8.
I
L SHAL ALM
OFT
I
I DEEP ALM
OFT
Toadjust
thecontrast, pressthemenu key
untiltheDARK/LIGHT menu appears. To
decrease
it,pressthedownarrowkey. Press
the up arrow keyto increase thecontrast.
Thebargraphin theDark/Light menu box
showsagraph
ofthecontrast. Thescreen
willalso show the effects ofthechange. If
you
reachthemaximum orminimum level,a
tonesounds
alerting youtothe limits. The
menu will clear automatically after a few
seconds oryou canpress the ON/CLEAR
keytoclearthescreen.
ASP(AdvancedSignal Processing) E
— —
373FT t-ct
ASP is aprogram
embedded in theMagna
II'scomputer that isspecifically designed to ASP
eliminate no!se. Itcontinually monitorsthe
signals
fromthe
receiver, determines which
echoes are noiseand rejectsthem. This
allowstruetargetechoes to display onthe
screenwith aminimum ofclutter. Thisfea-
tureisespecially usefulsinceittypically
lets
youoperate theboatatall speeds without ___________________
adjusting the sensitivity or othercontrols.
Whenthe
Magna
IIor
Magna
IIPlusisfirstturned
on,
ASPisenabled.To
turnASP
off,
press
themenukeyrepeatedlyuntiltheASPmenuappears.
Nowpressthe
uparrowtoturniton
orthedownarrowtoturnitoff. The
menuwill
clearautomatically afterafew
secondsoryou can
pressthe
ON/
CLEAR keytoclearthescreen.
373FT
DISI
MODE
CHT1
1:1 E:::::::..::::.:::::::::s::;.::.
.:
-n
DIG 1 (Digital #1)
t.O
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LAMP
TheMagna IIandMagna II Plus' displayis
backlighted fornight
use. Toturntheback- __________
lights onor
off,press
the menukeyrepeat-
edly until theLAMP menu appears. Now
pressthe uparrowtoturnthe
lights
onorthe _______
downarrowtoturnthemoff. Themenu will __________ ____
clearautomatically aftera few seconds or _____
youcanpress theON/CLEAR keytoclear
thescreen.
FEET/METER
The
Magna
IIandMagnaIIPluscanshowthe
depth
infeetormeters. TheMagna II Plus
canalsoshow
temperaturein
degrees Fahr-
enheitorCelsius, speedinstatutemiles per
hourorknots, and distance (log) instatute
milesornauticalmiles. Wheneither unitisin
themetricmode, alldepthreadings,ranges,
zooms,and alarm sethngs are in meters.
Whena unit is in thefeet mode,
allofthe
above settingsarein feet.
To
change fromfeettometersor
vice-versa, press
the
menukeyuntilthe
FEET/METER menu appears. Press thedownarrow keytoswitchto
metric,the uparrowtoswitchtofeet. Displays showinfeetwhentheunit
isfirstturned
on. Themenu willclearautomatically aftera
fewseconds
oryou canpress theON/CLEAR keytoclearthescreen.
DISPLAYCONTRAST
Theunit's
displaycontrast isadjustabletosuitdifferent
lighting
conditions.
Thiswillhelpyou seethescreenfromdifferent
angles,oratvarioustimes
ofthe
day.
DISPLAYMODE (cont.)
MAGNAII PLUSONLY
CHT1 (Chart#1)
This isthe default mode used when the
Magna
IIPlusis
firstturnedon. Ithasthefol-
lowing features:
1.Automatic On
2. Ash ID FeatureOn
3. Digital Depth
Display On
CHT3
(Chad#3)
SameasChart#1 plus digital speed
display.
CHT2(Chart#2)
Same as Chart #1 pIusdigitalsurface
water
temperature display.
CHT4
(Chart#4)
Thisis
the
HighSpeedScroll mode. Itshifts
thechart speed into high gear, scrolling
echoes atahighrate. Ithasthefollowing
features:
1. Automatic Off
2. FishID FeatureOff
3. All Digital Displays Off
16 13
373FT ect
I LAMPI .4
ZM——20
34.1FT
743°F:
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DIG1 (Digital#1)
Thisisthefirstdigitalonlyscreen. Itshows
thedigital depth display at the top of the
screenin
verylargenumbers. Theshallow
and deep alarm settings are displayed be-
neaththedigitaldepth. Nochartshowson
thisscreen.
DIG 2(Digital#2)
Thedigitaldepthdisplay showsatthe
top
of
thisscreenin:
verylargedigits. Thedigital
temperature,speed, and log
showsbeneath
the
depth. Thelogstarts counting whenthe
MagnaII Plusis firstturnedon. Whenthe
Magna
IIPlusisturnedoff, the
logisresetto
zero.
ALARMS
FISHALARM
The Fish Alarm sounds atonewhenafish
symbolappears
onthescreen. Tousethe
fish alarm, press the menu key until the
"FISHALARM"menuappearsonthescreen.
Now
press
the
up
arrow
key
toturnthealarm
on. Repeat theabove steps toturnthefish
alarmoff. (Note: IftheFishID featureisoff,
it will beturnedon whenyou turnthe fish
alarm
on.)
Thedepth
alarms
aretriggered onlybythe
bottom
signal.Nootherechoes
willactivatethesealarms. The
depthalarmsconsistofashallowand deep
alarm. Theshallow alarm sounds analarmtone whenthebottom
goes
shallowerthanthealarm's
setting. The deep
alarmsoundsatonewhen
thebottom
goesdeeper
thanft'ssetting. Both alarmsadjust thesame,
althoughthrough differentmenus.
ShallowAlarm
Tosettheshallow
alarm,
pressthemenukey
repeatedly
until the"SHALALARM"menu
appears. Press thedownarrow keytoin-
creasethe
depth,
the
up
arrowkeydecreases
it. Thenumber in theshallowalarm's menu
boxshows
thecurrentshallowalarmsetting.
When thenumber reachesthedesired set-
ting,release thearrow key. PresstheON!
CLEAR key to removethe shallow alarm
menufromthescreen. Nowwhenthebottom
depth goesshallowerthanthealarm's set-
ting
analarmtonesounds.Atthesametime
thealarm sounds, amessage box appears
onthescreenas shown below.
Pressthe
uparrowkeyto
silencethealarm.
___________ Thiswillturnthealarm sound offuntilthe
shallow alarmis
triggered again.
Toturnthealarm off, press themenu key
untiltheshallowalarmmenuappears. Then
pressthe uparrowkeyuntiltheword"OFF"
appears;
Deep
Alarm
Thedeepalarm adjusts the
sameastheshallowalarm. Usethe'DEEP
ALARM"menu toadjust the
deepalarm. Whenthebottom signalgoes
deeper
thanthesetting, analarmtonesounds.
DISPLAYMODE (cont.) DEPTH ALARMS
DEPTH FT
[60.8]
I SHAL ALM
L OFT
F DEEP ALM
OFT
DEPTH FT
[38.3]
F TEMP °F
I_ T88
ISPEED MPH
L 33.8
I LOGMI
8.3
373FT .-t
SHAL
ALARM
MUTE
S
14 15
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