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Slave
The Slave mode is used if the SN90 system shall transmit only when
permitted by a peripheral system. When the Slave mode is selected, the
SN90 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
is switched off.
Master
In Master mode, the SN90 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 SN90 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.
381294/E
setting is not applicable when synchronization
Functions and dialog boxes
583
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