Data Link; Figure 5-10: Sockblast Window - Edgetech 4200 User Hardware Manual

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5.5.6 Data Link

A good, quick, qualitative test of the data link and tow fish electronics is to perform a rub test on each
transducer. Set the Range to 200 meters for both frequencies and start the system running in HDM mode
for both. Set screen gain to +30dB for both frequencies and briskly rub each aft transducer face one at a
time. A dark band should appear on the sonar processor screen corresponding to the side rubbed.
Data throughput rates on the uplink (fish to topside) can be critical in getting smooth data from the tow
fish. The data throughput rate can be checked using EdgeTech supplied utilities at each end of the link
The sockBlast application is used to test network throughput between the 4200 Towfish and the topside
computer. This application is normally kept in C:\EdgeTech\Utilities folder on the topside unit and
D:\EdgeTech\Utilities folder on the Towfish.

Figure 5-10: sockBlast Window

Two copies of the same version must be run once on each computer. One serves as the client (topside)
and the other as the server (tow fish). Since the client connects to the server, the Create Client (topside)
address must be the TCP/IP address of the server (tow fish) machine, which is 192.9.0.101. The tow fish
Create Server address should be 192.9.0.99.
After pressing the Create buttons to start the server and clients on their respective machines, the two
applications hook up, then the Client count on the tow fish should increment from 0 to 1, and the Server
count on the topside should increment to 1 as well. This indicates that there is one connection between
the two applications
Check the Server Send Data box on the tow fish. A performance in MB/second will be displayed. This
should be more than 0.35Mbyte/s.
4200 SIDE SCAN SONAR SYSTEM USER HARDWARE MANUAL 0004842_REV_N