Simrad SC90, Installation Manual

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Synchronization modes
The purpose of the synchronization modes are to set up the SC90 to operate alone, or as
a "master" or "slave" in a synchronized system.
Whenever more than one hydroacoustic system is
installed on a vessel, interference may occur. To avoid
this, you have these options:
• The systems are all connected to a common
synchronization system.
• One of the acoustic systems is set up as "master",
and controls the transmissions on the other systems.
The SC90 offers functionality for remote transmit
synchronisation. It can be set up to operate in either
Master or Slave mode.
The following synchronization modes are available.
•
None
Synchronization is switched off.This synchronization mode is used if the SC90 is
working by itself, and with no synchronization required. This is the default setting.
The SC90 operates using its internal ping interval parameters, independent of any
trigger signals arriving at the synchronization port.
The
Delay
setting is not applicable when synchronization is switched off.
•
Master
The Master mode is used if the SC90 shall act as the "controlling" unit in a
synchronized system. The peripheral hydroacoustic system(s) are only permitted to
transmit when enabled by the SC90. When the
Master mode is chosen, the SC90
will run using its internal ping interval parameters, and send trigger signals to the
peripheral system(s).
•
Slave
The Slave mode is used if the SC90 shall transmit only when permitted by a peripheral
system. When the Slave mode is chosen, the SC90 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 synchronisation system.
Note
To select synchronization mode, use the
External Synchronization
parameter dialog
box on the
Setup
menu.
To choose which communication port to use, select
I/O Setup
on the
Installation
menu.
On the
I/O Setup
menu, select
External Sync
to open the
Sync Port Configuration
parameter dialog.
Cable layout and interconnections