Simrad EQ60 - Manual (Page 151)

Cable layout
139
857-164342 / Rev.C
External triggering
Overview
Whenever more than one hydroacoustic system (echo sounder or
sonar) is installed on a vessel, interference may occur. To avoid
this, the systems may either be connected to a common
synchronization system, or one of the acoustic systems may be
defined as a “master”.
The EQ60 echo sounder include interface for remote transmit
synchronisation. The system can be set up to operate in either
Master or Slave mode in relation to an external synchronization
or hydroacoustic system.
The EQ60 system may comprise more than one General Purpose
Transceiver (GPT). If the EQ60 operates as a Master, the
synchronization between these are controlled by the echo
sounder software. If the echo sounder operates as a Slave
system, the GPT units must be individually controlled by the
Master system.
Note
In its default configuration, the EQ60 is set up to operate as a
Master. Special action must be taken to reconfigure the echo
sounder for Slave operation.
Master system
When the EQ60 system is set up to operate as a Master in a
system, the TrigOut signal from the GPT Auxiliary connector
must be connected to the external trigger input on the other
hydroacoustic system(s). If more than one GPT us used by the
Master system, the TrigOut signal must be taken from the
active GPT. Two TrigOut signals are available for either
positive or negative triggering. When activated. the trigger
signal will allow all the systems to transmit simultaneously.
Note
Simultaneous transmission of more than one system can only
take place if the systems operate with different frequencies!
→ The cable and connections to the GPT is shown on page 151.
The TrigOut+ signal is an open collector output (max 100 mA)
containing a 100-kohm pullup resistor to +5 Vdc. This signal is
normally low. The TrigOut+ signal goes high when the
transceiver is ready to transmit, and it goes low again when all
frequency channels of the transceiver have finished transmitting.
TrigOut- is the inverse of TrigOut+.
Connect the ground wire to one of the Ground pins (18-22).