1 Measuring noise with a transducer connected

Measuring noise with a transducer connected includes all the source of noise the system will experience.

Prerequisites

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The EK80 must be correctly setup for noise measurements.

1 Set up the EK80 for noise measurements

Context

The noise sources are all present in these measurements.This may be acoustic noise and electrical noise.The electrical noise experienced may originate from noise in the transducer cable, noise which affects the WBT and electrical noise occurring in the cabling to the WBT from power supply.

Procedure

Record raw data.

Open the Operation menu. Record RAW is located on the Operation menu.

To start data recording, select On or the red circle on the right side of the Record RAW button.

Record for 5 minutes for each combination of parameter settings.

To stop recording, select Off or the black rectangle on the right side of the Record RAW button.

Open the Setup menu.

Open the Diagnostics dialog box from the Setup menu.

Select Noise to open the page.

Read and record the Noise Estimate value for 10 pings.

The value will vary from ping to ping.

Calculate the average noise estimate from the values of the10 ping.

Enter this value in the table.