The purpose of this publication is to provide the descriptions and procedures required to allow for efficient use of the ST90 system. The manual does not contain detailed information about functions, dialog boxes and operating parameters.
In order to transmit ("ping"), you must set the ST90 system to Normal operating mode. This is the default mode when the ST90 system is turned on.
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.
Inactive mode is provided to pause the operation temporarily. Neither transmission nor reception takes place. The current echoes are removed from the display presentation.
You can set up the ST90 system to transmit (ping) as often as possible. This gives you the maximum refresh rate.
You can set up the ST90 system to transmit a single ping only when you want it.
You can set up the ST90 system to transmit pings with a fixed time interval.
You are permitted to adjust the output power from the ST90 system. Tx Power is used to control the amount of power that is transmitted with each ping.
The Frequency function is used to control the centre frequency of the acoustic transmissions (pings). You can select any operational frequency from 14 to 24 kHz. All types of noise matter when you wish to find the best operating frequency.
The functions and dialog boxes provided in the ST90 user interface are not described in this publication.
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.
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.
