Reson SeaBat 7125 SV2, Operator'S Manual

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SYSTEM CONFIGURATION
SeaBat 7125 SV2 Operator‟s Manual
Page 39 July 25, 2011
Version 3
4.5.1.2 Clock (1PPS)
To achieve correct time stamping of transmitted pulses it is necessary to send time to
the transceiver. The SeaBat uses the GPS PPS system to achieve this. The Data
Acquisition System (DAC) should also be synchronized to this. From the GPS receiver,
the SeaBat needs the TTL 1PPS pulse and the qualifying time message (normally ZDA).
The clock synchronization must always be entered in the I/O module. For installation
instructions, see
appendix C.4.3 Time Input .
CAUTION
Ensure that the time synchronization is operating correctly. Failure to do so could
compromise data quality.
The maximum pulse length for the 1PPS is 100ms.
4.5.1.3 Motion Sensor (for Roll Stabilization)
In order for the sonar to correctly perform real-time roll stabilization, a high-speed serial
input is required, fed directly into the sonar processor. The roll, pitch, and yaw should be
observed near the sonar head. If PDS2000 or a different acquisition system is used, the
motion sensor should not be entered in the I/O module. The motion sensor data for the
roll stabilization is read directly from the FPGA. For installation instructions, see
appendix C.4.2 Motion Sensor Input .
4.5.2 Adding a Device
To add a new I/O module device, follow these steps:
1. Start the 7k user interface and select the I/O Module Setup tab.
2. Click New to add the relevant device (e.g. SVP, clock, motion sensor).
3. Select device type and driver.
4. Click the required Port Type.
5. Select the appropriate settings under Serial or Socket properties, Host, and
Protocol (the settings may be preselected).