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2
Select
Synchronization
3
Select synchronization mode.
• Stand-alone
Synchronization is turned off.This synchronization mode is used if the SN90
is working by itself and with no synchronization required. This is the default
setting. The SN90 operates using its internal ping interval parameters,
independent of any trigger signals arriving at the synchronization port.
The
Synchronization Delay
switched off.
• Master
Master mode is used if the SN90 is going to act as the controlling unit in a
synchronized system. The peripheral hydroacoustic system(s) are only permitted
to transmit when enabled by the SN90. When Master mode is selected, the SN90
will run using its internal ping interval parameters and send trigger signals to the
peripheral system(s).
This mode is unavailable if you set
Port.
• Slave
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.
4
Select the synchronization delay.
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.
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.
The
setting is not applicable when synchronization is turned off.
Delay
5
Select
and then
Apply
dialog box.
Related topics
Setting up the SN90 in a synchronized system, page 148
381295/B
.
setting is not applicable when synchronization is
Synchronization Port
to save all the parameters and close the
Close
Operating procedures
to Transceiver Auxiliary
Installation
153
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