JW Fishers SCAN-650, Руководство по эксплуатации

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16
SONAR PROCESSOR
OPERATOR SWITCHES AND CONTROLS
THE HARDWARE
Scanning Head (transducer module):
The scanning head does not contain any operator switches or controls. The scanning head is
factory calibrated and should not be opened.
Computer:
The system will run on a Laptop, Desktop, or on JW Fishers optional “Splash Proof” computer. The
“Splash Proof” is a computer system that is built into a Underwater Kinetics case. It utilizes a 10” Ultra
Bright” display which is much easier to read in a open boat.The Sonar Processor has an integrated
interface board that converts the analog signals to digital, and inputs the signal to the computer. The
computer takes the digital signal, displays it, and stores it for future reference. The software has
numerous toolbars and pull down menus for controlling the display. There is also communications
from the computer to the transdcucer which allow the operator to control different functions within the
Fish.
Sonar Processor:
The Sonar Processor amplifies and conditions the signal from the scanning head. The amplifier
in the Sonar Processor is called a Time Variable Gain (TVG) amplifier. The gain of the amplifier
increases over time for each returning signal. The operator has very precise control of the TVG
amplifier using the three gain controls.
The Near Gain, Far Gain, and Overall Gain controls on the front of the Sonar Processor are adjust-
ments for the Time Variable Gain (TVG) amplifier. The goal of these adjustments is to adjust the
amplifiers to compensate for signal losses that occur when the signal travels through the water.
When they are adjusted properly, a reasonably even color will represent the ocean floor from the
center to the outer edge of the scanned area. (See page 15 for a detailed description of the TVG)