Finaltestsandmeasurements
Comparetheresultwiththespeciîš¿cation.
Typicalvoltageresponsemeasurement
•5±3dB(????)
Finalizingtheprocedure
Thevoltageresponsemeasurementshavenowbeencompleted.
Note
Remembertorestoreallmenusettingstonormaloperationalstandard.
Receivingvoltageresponsetestresults
Thetwotablescreatedforthetestresultsareprovidedbelow.
Table5VRMeasurementresults
Measurements/calculations
Value
Unit
Example
A
Noiselevel(EchoLevel)dB//1V/µPa
42
U(p-p)volt
1
U(rms)=U(p-p)/2/√2
volt
0.355
B
Hydrophone
voltage
UHydr=20logU(rms)dB//1V
-9
Table6Receivingvoltageresponse(VR)
VR=–(S+UHydr-20logR)+EL
Value
Unit
Example
A
S=SHydrophonedB//µPa/V
117
B
UHydrophone=20*logU(rms)dB//1VdB//1V
–9
C
20logRdB
16
D
Noiselevel(EchoLevel)dB//1V/µPa
90
E
VR(VoltageResponse)dB
–1
381293/A
205
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