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Slave mode is used if the SN90 is going to transmit only when permitted by a
peripheral system. When Slave mode is selected, the SN90 does 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.
7
Select
Synchronization Delay
This delay parameter is used differently depending on the chosen synchronization
mode.
•
Stand-alone
The
Synchronization Delay
switched off.
•
Master
In Master mode, the SN90 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 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.
8
From the list of ports available, select
This is the interface port currently used to transmit or receive synchronization
signals. It must be an RS-232 serial port. Since the synchronization function only
uses the Request To Send (RTS) and Clear To Send (CTS) signals on a serial port,
you can use a port that is already used for other purposes. For the same reason,
you do not need to define any baud rate.
9
At the bottom of the page, select
10 Continue your work in the
Related topics
Setting up the interfaces to peripheral devices, page 132
381295/B
.
setting is not applicable when synchronization is
Synchronization Port
to save your settings.
Apply
dialog box, or select
Installation
Operating procedures
.
to close it.
OK
147
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