Chapter 6 CVS-842/852/843
Using the Menu Operation Manual
6.5.1.2 Output (H) (L)
This function increases or decreases the sounder power output in two steps. In normal operation, this
setting should be set to Normal. In case the need is arisen to reduce the power, such as an inspection
of acoustic power output, set the setting to Low.
Selections: Normal, Low
Initial setting: Normal
Low
Normal
School of fish
The echo signal is
weakened due to powe
reduction
Figure 6.5 Reduction of output power
6.5.1.3 PRR (Pulse Repetition Rate)
This function changes the rate of transmission per minute. Using this function, you can eliminate the
false echo caused by other sounder’s transmission working on nearly the same transmission rate.
Selections: 1 (Fastest) – 10 (Slowest)
Real echoes
of fish school
Initial setting: 1
6.5.2 Image
Figure 6.6 Reducing the interference
by changing the PRR
False echoes produced by the transmission
from other sounder
Real sonar echoes produced by own sounder
2 10
1
NOTE: When secondary echoes are displayed
caused by own transmission, set the Bottom
Detection to Outside Range in the SYSTEM
menu.
6.5.2.1 Enhance
Enhances the picture presentation by changing the dynamic range of a sonar video in 5 steps. When
you increase the number, the shades of colors are widened causing the echo density of fish and
6-6 0093132692-05
To Next Page
Loading...
