Raymarine A65 - CHIRP Sonar Module Frequency Controls

Thegraphabovedepictsanexampleofthenetuning(from—50%
to+50%)availablewhenthefrequencyissetto200kHz.
Tuningtheshnderfrequency(non-CHIRPsonarmodule)
Whenconnectedtoanon-CHIRPsonarmoduleyoucanmanually
tunetheshnderfrequency.
Fromtheshnderapplication:
1.selectMenu.
2.SelectFrequencysettings.
3.SelecteitherTuneFreq1orTuneFreq2asrequired.
TheTuneFrequencysliderbarisdisplayed:
4.Adjusttheslidertotherequiredvalue.
theoptimumfrequencywillbewhentheechoreturnsarethe
strongestonthescreen.
5.SelectBacktoclosethetunefrequencysliderbar,or
6.SelectOktosetthetunefrequencytoautomatic.
15.11CHIRPsonarmodulefrequency
controls
Thefrequencyofthesonardeterminesthewidthofthesonarbeam,
thedepthtowhichthesignalswillpenetrateandtheresolutionof
theimage
Thefrequenciessupporteddependuponthesonarmoduleand
transducerinuseonyoursystem:
•Lowerfrequenciesproduceawidersonarbeamandpenetrate
thewaterwell.Alowerfrequencyprovidesalowerresolution
imagethatmaynotbeasgoodatdetectingsmallsh.Uselower
frequenciesifyourequirealargecoveragebeneathyourvessel
orifyouareindeepwater.
•Higherfrequenciesproducenarrowerbeamandproduceahigh
resolutionimage.Theyaremostusefulinshallowerwater(upto
1000ft)andathigherspeeds.
Theoptionsavailable(dependantuponconnectedsonarmodule
andtransducer)are:
•Auto.Whenoperatinginautomaticthesystemwillselectthe
frequencyautomaticallytosuityourtransducerandoperating
conditions.
•Lowfrequency(e.g.50kHz)(non-CHIRPmode).
•Mediumfrequency(e.g.90kHz)(non-CHIRPmode).
•Highfrequency(e.g.160kHz)(non-CHIRPmode).
•LowChirp(e.g.42to65kHz)(CHIRPmode).
•MedChirp(e.g.85to135kHz)(CHIRPmode).
•HighChirp(e.g.)130to210kHz)(CHIRPmode).
Note:IfaCHIRPsonarmoduleisconnectedtoa(traditional)
non-CHIRPtransducertheCHIRPsonarmoduleoperatesasa
non-CHIRPsonarmodule.
Settingtheshnderfrequency(CHIRPsonar
module)
WiththeFrequencysettingsmenuoptionsyoucancongureone
ortwofrequenciesforeachofthefourpresets.
1.FromtheshnderapplicationselectMenu.
2.SelectFrequencysettings.
3.SelectFreq1orFreq2asrequired.
4.Selecttherequiredfrequency:
ExampleofFrequencysettingmenuwhenconnectedtoa
CHIRPsonarmodule.
1
2
D12 57 3-1
1.Non-CHIRPmodes
2.CHIRPmodes.
178NewaSeries/NewcSeries/NeweSeries