Simrad ES80 User Manual

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ForCWtransmissions:
•Longpulsesprovideslongerdetectionrange.TheymaketheES80lesssensitivefor
noise,butofferlowerrangeresolution.
•Shortpulsesprovidesshorterdetectionrange.TheymaketheES80moresensitivefor
noise,butofferhigherrangeresolution.
ForFMtransmissions:
•Longpulsesprovidelongerdetectionrange,butofferlowerrangeresolution.
•Shortpulsesprovideshorterdetectionrange,theymaketheES80moresensitivefor
noise,butofferhigherrangeresolution.
Tip
WhenyouselectAuto,theES80willautomaticallyselectthebestpulsedurationforthe
currentoperationalmode,depthandbottomconditions.Fornormaluse,werecommend
thatthepulsedurationissettoAuto.
Procedure
1OpentheOperationmenu.
2SelectNormalOperation.
ObservethattheNormalOperationdialogboxopens.
3Fortherelevantchannel,setPulseDurationtoyourchosenvalue.
4SelectOKtosavetheselectedsettingandclosethedialogbox.
Deningthefrequencysweep(chirp)withineach
transmission
TheES80supportswidebandtransmissionsusingfrequencysweeps.Thisisoften
referredtoas"chirp",andmeansthatthetransmissionfrequencychangesfroma"start"
frequencytoan"end"frequencywithinthetransmission.Inordertousethefrequency
sweep("chirp")functionality,youmustusefrequencymodulated(FM)pulses.Youmust
alsouseawidebandtransducerthatsupportsthecompletefrequencyrange.
Context
TheStartFrequencyandEndFrequencyparametersareusedtosetupafrequencysweep
("chirp").Iftheparametersforstartandendfrequenciesareunavailable,thetransducer
usedontherelevantchanneldoesnotsupportwidebandtransmissions.Inordertousethe
frequencysweep("chirp")functionality,youmustusefrequencymodulated(FM)pulses.
Operatingprocedures

Simrad ES80 Specifications

General

Operating Temperature	-15°C to +55°C
Type	Echosounder
Transceiver	External
Applications	Fisheries research, commercial fishing
Depth Range	Up to 3000 meters
Interface	Ethernet, NMEA 2000
Frequency Range	18 kHz, 38 kHz, 70 kHz, 120 kHz, 200 kHz, 333 kHz