4-1
4.0 DIGITAL INTERFACE
The EdgeTech side scan telemetry is used to transfer the magnetometer data to the topside. The
magnetometers have a bidirectional RS-232 interface at 9600 bps. The magnetometer data is read by the
Towfish electronics, encoded onto the side scan telemetry, and then decoded on the EdgeTech 4205
Topside. The magnetometer data is made available on the topside serial port output. Control messages
from the PC hosting the magnetometer user interface software, are likewise transferred to the
magnetometer Towfish. A null modem serial cable is required to connect the EdgeTech topside to a laptop
or PC running the magnetometer acquisition software (Sealink, Maglog, etc.)
The EdgeTech telemetry allow for a full bi-directional communication link between the topside and the
magnetometer, where data flow upstream and commands flow downstream. To properly relay the ‘Mag’
data from the Towfish onto the PC/laptop running the magnetometer acquisition software, the SONAR
program running in the tow fish as well as the DISCOVER software running on the topside need to be
configured properly. The following show the required fields in the initiation files.
4.1 Configure the Towfish
The Towfish has a file that needs to be configured if a Baud other than the Default 9600 is to be used.
Towfish setup:
1. Connect to the Towfish using Windows Remote Desktop on the topside computer.
Figure 4-1: Remote Desktop Selection (Windows Desktop)
a. The Remote Desktop settings are:
Ethernet address: 192.9.0.101
Login name: Administrator
Password: admin
2) Left Click using mouse button to select “Remote Desktop”
1) Right Click Right Click using
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