Synchronization Mode
Choose which synchronization mode to use.
For "slave" operation, a remote system (for example K-Sync or Simrad TU40) must be available to provide trigger pulses.
For "master" operation, a remote hydroacoustic system (sonar, echo sounder) is connected. This remote system must be set up in "slave" mode.
Stand-alone
This synchronization mode is used when the ST90 system is working by itself. Synchronization is turned off. It is the default setting. The ST90 system operates using the current settings for ping interval. The operation is independent of any trigger signals arriving at the synchronization port.
The Synchronization Delay setting is not applicable when synchronization is switched off.
Master
Master mode is used if the ST90 system shall operate as the controlling unit in a synchronized system. Any peripheral hydroacoustic system(s) are only permitted to transmit when enabled by the ST90 system. The ST90 system operates using the current settings for ping interval. It also sends trigger signals to the peripheral system(s).
This mode is unavailable if you set Synchronization Port to Transceiver Auxiliary Port.
Slave
The Slave mode is used if the ST90 system shall transmit only when permitted by a peripheral system. When the Slave mode is selected, the ST90 system will not transmit ("ping") unless an external trigger appears on the chosen synchronization port. The peripheral system may be any other hydroacoustic product (for example an echo sounder or sonar), or even a dedicated synchronization
system.
The synchronization mode is not fixed. It can be changed at any time during operation.
NoteSimultaneous transmission of more than one hydroacoustic system can only take place if the systems operate with different
frequencies.
Synchronization Delay
This delay parameter is used differently depending on the chosen synchronization mode.
Stand-alone
The Synchronization Delay setting is not applicable when synchronization is switched off.
Master
In Master mode, the ST90 system waits for the delay time after the external trigger signal has been sent to the slaves before transmitting the ping. This is often referred to as a pre-trigger.
NoteThis delay will only work when the synchronization is set up using a serial port.
Slave
In Slave mode, the ST90 system waits for the delay time after the external trigger signal has arrived before transmitting the ping. This is often referred to as a post-trigger.
Synchronization Port
This is the interface port currently used to transmit or receive synchronization signals. Since the synchronization function only uses the Request To Send (RTS) and Clear To Send (CTS) signals on a serial port, you may be able to use a port that is already assigned other interface purposes. For the same reason, you do not need to define any baud rate.