Overview; 4125 Series Applications; Main System Components; 4125-P Portable Topside Processor - Edgetech 4125 User Manual

1.0 OVERVIEW

The EdgeTech 4125 Series Dual-frequency Side Scan Sonar System is a frequency-modulated (FM), dual-
frequency, side scan sonar that uses EdgeTech's proprietary Full Spectrum "chirp" technology to generate
high-resolution, side scan imagery at longer ranges than conventional continuous-wave (CW) systems.
The system is designed primarily for search and recovery operations, along with surveys in shallow water.
The 4125 Series is available in two, dual simultaneous frequency configurations depending on the
application: 400/900 kHz and 600/1600 kHz. 400/900 is the best choice for general survey work and the
600/1600 for the highest resolution such as search and recovery applications, etc.
In both configurations, the frequencies are transmitted as linearly-swept, wide-band, high energy acoustic
pulses, and the received echoes are processed into high signal-to-noise (SNR) images that can be directly
displayed as shades of gray or color on a computer monitor. The SNR images can also be printed on a
continuous feed thermal printer, or stored in real time onto a large capacity hard drive and archived onto
a DVD.

1.1 4125 Series Applications

Applications for the 4125 Series Dual-frequency Side Scan Sonar System are many, including:

Hydrographic surveys

Geological surveys

Search and recovery

Channel conditioning/clearance surveys

Bridge, pier, and harbor wall inspections

Hull inspections

Port security

Archaeological surveys

1.2 Main System Components

The 4125 Series Dual-frequency Side Scan Sonar System is composed a 4125-P Portable Topside Processor
or 4125 Rack Mount Topside, a 4125 Towfish (commonly called a Towfish), and a tow cable.

1.3 4125-P Portable Topside Processor

The 4125-P Portable Topside Processor is shown in
to the towfish for sonar control and receives uplink side scan data, sensor data, and status information
from the towfish for processing, storage, and display.
F 1-1. It provides power and downlink telemetry
IGURE
1-1