Kongsberg Simrad ST90, Справочное руководство

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• 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.
Note
Simultaneous 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 .
Note
This 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.
Simrad ST90 Reference Manual