1 Defining the raw data recording parameters

The EK80 allows you to record both raw and processed echo data. The data are saved on the hard disk, or on an external data storage device, according to the preferences you have defined.

Context

The File Setup settings control how and where the recorded files are saved on the hard disk, or on an external storage device. By adding a prefix to the file names you can identify the files you have recorded during a specific survey. You can also define a maximum size of the files.

Tip

The data files will normally become very large. If you wish to record large amounts of data, make sure that you have enough space on your hard disk. Unless your computer is equipped with a very large disk, we recommend that you save the data to an external storage device.

Set up the file and folder parameters before you start the recording. If you wish to save your recorded data on an external hard disk, make sure that it is connected to the computer.

If the current file size gets too big during recording, select Split File on the Record RAW button. This will close the current file, and then automatically continue recording to a new file. Record RAW is located on the Operation menu.

Procedure

Open the Operation menu.

Select Output.

Observe that the Output dialog box opens. This dialog box contains a number of pages selected from the menu on the left side.

In the Output dialog box, select File Setup.

On the File Setup page, define the recording parameters.

Define the output directory for the recorded files.

In order to change the output directory, both Record RAW and Record Processed recording must be set to Off. The same folder is used for both raw and processed files.

Define a file name prefix.

By adding a prefix to the file names you can identify the files you have recorded during a specific survey.

Define the maximum amount of bytes to be contained in one data file.

Select Maximum for 1 GB file size.

The current size of the RAW data file is displayed during data recording. If the current file size gets too big during recording, select Split File on the Record RAW button. Record RAW is located on the Operation menu.

Specify the raw data recording parameters.

The Range setting defines the vertical or horizontal distance from where the echo presentation starts to the end of the search area.

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Select Common to use the same recording range for all your active channels.

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Select Auto to allow the EK80 to automatically find the required range value.

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Select Individual to use the different recording ranges for your active channels.

The Stored sampled data for WBTs running CW options can be used to reduce the amount of recorded data when you are using a Wide Band Transceiver (WBT) with CW pulses.

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Select Complex samples to use the default data format.

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Select Power/Angle to reduce the file sizes.

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Select Reduced sampling rate Power/Angle samples to minimize the file sizes.

Note

Unless you choose Complex samples your RAW data files will contain less information.

The Motion Data Recording function allows you to control how often the motion data are saved in the raw data file.

At the bottom of the page, select Apply to save your settings.

Select OK to close the dialog box.