Synchronisation Using Gpt Auxiliary Plug - Simrad ES70 - INSTALLATION REV A Installation Manual

Simrad ES70
Master system
On the ES70 computer,
2 to 3 ms prior to transmitting, and returns to logical "high" (typically -10 Vdc) when
the echo sounder have finished sampling the echo data.
Slave system
The ES70 triggers on a positive edge from the sonar (level exceeds +3 Vdc) on
(pin 8).
Note
On Simrad ES70 software versions prior to 2.2.0. pin 7 on the echo sounder must not be
connected when the echo sounder runs in "slave" mode.
Older Simrad sonars
On older Simrad sonars, you must use a serial line on each end. The ES70 serial line
must then be connected to a serial line on the sonar according to the description in section
RS-232 as external trigger on page 43.

Synchronisation using GPT Auxiliary plug

The General Purpose Transceiver (GPT) is equipped with an auxiliary socket, and this
interface device supports trigger pulses.
Related topics
• GPT trigger / synchronisation on page 58
Master system
When the ES70 system is set up to operate as a Master in a system, the
from the transceiver's
on the other hydroacoustic system(s). If more than one transceiver is used by the Master
system, the signal must be taken from the active transceiver. Two
TrigOut
signals are available for either positive or negative triggering. When activate, 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 signal is an open collector output (max 100 mA) containing a 100 kohm
TrigOut+
pullup resistor to +5 Vdc. This signal is normally low. The
when the transceiver is ready to transmit, and it goes low again when all frequency
channels of the transceiver have finished transmitting.
is the inverse of
TrigOut-
96
(pin 7) goes logical "low" (typically +10 Vdc) approximately
RTS
connector must be connected to the external trigger input
Auxiliary
.
TrigOut+
CTS
signal
TrigOut
TrigOut
signal goes high
TrigOut+
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