CVS-841/851
Chapter
1
Operation Manual
General Information
Chapter 1 General Information
1.1 General features of the equipment
The CVS-841/851 series sounder is designed to meet stringent demands of the professional
fishermen, featuring a 10.4 inch or 15 inch color LCD display, a dual frequency, 1 kW or 3 kW power
output. According to the display size and power level the model name is designated as follows:
CVS-841C: The screen size is 10.4 inch (Diagonal) arranged in portrait mode with the 1 kW output.
CVS-851C: The screen size is 15 inch (Diagonal) arranged in landscape mode with the 1 kW output.
CVS-841P: The screen size is 10.4 inch (Diagonal) arranged in portrait mode with the 3 kW output.
CVS-851P: The screen size is 15 inch (Diagonal) arranged in landscape mode with the 3 kW output.
The CVS-841/851 series is composed of a display unit with a built-in TX/RX (Transmitter/Receiver)
module and a transducer device. General features of each model are as follows:
Display unit: This unit uses a high brightness, TFT (Thin Film Transistor) Liquid Crystal Display (LCD)
to allow easy viewing in daytime and nighttime operations. The screen size and its arrangement of the
display unit vary according to the type.
TX/RX module: This module is composed of the transmitter and receiver sections, contained in the
display unit. Changing the settings on the printed board of this module can change the transmitting
power level and frequency. The output power can be selected from 1 kW (CVS-841C/851C) or 3 KW
(CVS-841P/851P) and the frequency from 28 kHz, 38 kHz(or 40 kHz), 50 kHz, 75 kHz or 200 kHz.
All controls of the sounder unit can be performed from the display unit. The operation is simple and
straightforward; using dedicated rotary controls and tactile keypads with user-friendly menus. The unit
can be set to hands-free operation, where the gain and depth range are automatically selected to an
optimized level by a micro-controller chip. The display unit is a splash proof design, meeting IPX5
technical standard.
1.2 Applicable standard
The CVS-841/851 series of sounder is designed and tested to comply with the international standard
of IEC-60945 3
rd
edition that defines general requirements of electronic maritime equipment.
1.3 Equipment configuration
The CVS-841/851 system composition is shown in Table 1.1 (Refer to Figure 1.1 for the system
configuration diagram)
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