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Operating procedures
Recording and replaying echo data
Recording echo data
Use the data recording functionality provided by the ST90 system to save echo data. The data files can be copied or moved to an external storage device. You can keep the recorded files for future reference, training purposes and calibration. The recording is controlled by the Record function.

About this manual
The purpose of this publication is to provide the descriptions, procedures and detailed parameter explanations required to allow for safe and efficient use of the ST90 system. The publication also provides you with a thorough understanding of the parameters and adjustments provided by the ST90 system.
Simrad ST90
Operating procedures
- Getting started
- Choosing operating mode and key transmit parameters
- Controlling the gain and range settings
- Using the markers and tracking features
- Improving the recognition of fish and schools using receiver filters
- Recording and replaying echo data
  - Defining the file and folder settings for data recording
    A useful function of the ST90 system is it ability to record echo data. You can save the data to the hard disk, or onto an external storage device. To retrieve the data files you need to know where they are, and which file names that have been used. The data files can be played back on the ST90 system. The data files can later be deleted, copied or moved to another storage device. You can keep the recorded files for future reference, training purposes and calibration.
  - Recording echo data
    Use the data recording functionality provided by the ST90 system to save echo data. The data files can be copied or moved to an external storage device. You can keep the recorded files for future reference, training purposes and calibration. The recording is controlled by the Record function.
  - Locating the echo data files to delete, move or copy them
    Use the data recording functionality provided by the ST90 system to save echo data. You can save the data to the hard disk, or onto an external storage device.
  - Selecting Replay mode
    Replay mode allows you to play back previously recorded raw data. The ST90 system cannot operate normally while in Replay mode. Neither transmission nor reception takes place.
  - Choosing which echo data file(s) to replay
    When you record echo data the information is stored on the Processor Unit hard disk. Depending on your initial settings, the files can also be stored on an external storage device. The echo data files can be retrieved and played back on the ST90 system.
- Recording and exporting processed echo data
- Capturing the display presentation in image and video files
- Setting up presentation modes and views
- Defining the visual information in the sonar views
- Defining settings related to user preferences and individual customizing
- Saving, retrieving and maintaining user settings
- Defining the user-selected features on the Operating Panel
- Exporting sensor data, marker positions and technical information
Maintenance procedures
User interface
Menu system
Functions and dialog boxes
Concept descriptions
Technical specifications
The technical specifications summarize the main functional and operational characteristics of the ST90 system. They also provide information related to power requirements, physical properties and environmental conditions.
Datagram formats
The ST90 system can send and receive information to and from several different peripherals. All transmissions take place as datagrams with data sentences. Each datagram has a defined format and length.
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Recording echo data

Use the data recording functionality provided by the ST90 system to save echo data. The data files can be copied or moved to an external storage device. You can keep the recorded files for future reference, training purposes and calibration. The recording is controlled by the Record function.

Before you start data recording, make sure that you have defined where to store the files. To define which disks and folders to use to save the data files, select File Setup. If you wish to save your recorded data on an external hard disk, make sure that it is connected to the computer.

Tip:

You are permitted to define the maximum file size for each recorded file.

Unless you really need to record data for playback and/or training purposes, you should use this function with care. The data files will fill your hard disk very fast!

Note:

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. The ST90 system is not provided with unlimited disk capacity. We recommend that you save the data files to an external storage device.

Procedure

Open the Operation menu.
Start data recording by opening the Record RAW button, and select On.
or:
To start recording, select the red circle on the right side of the button.
The Record indicator on the top bar changes its colour to reflect that recording is active.
To stop recording, select Off or the black rectangle on the right side of the Record RAW button.