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1.3 Echo treatment / filtration
NB! In order for the filter to work optimally, the gyro signal should reach 50 times / sec as well as the correct speed indication
from Log and GPS.
Sea noise suppression (STC) and Gain amplification.
These two functions are related to the fact that Gain indicates the maximum gain used and STC reduces this at short range.
Short-range gain then varies depending on how much Sea (STC) is set and up to the maximum gain specified by the Gain button.
Amplification
Diistance
Adjust Gain at long range and use STC / Sea noise to adjust the gain at short range.
When the Sea function is in use, never set the suppression level too high. This may mean that echoes near the vessel are not
displayed. Then it is not only echo from waves that are attenuated, but also echoes from ships and other objects are removed
from the screen. Be sure to use as little Sea as possible.
If this is set to Auto, the radar will adjust the Sea Noise function in 15 ° sectors around the boat, but you have the option to
manually adjust the starting point of sea noise with the SEA button. If you walk in narrow waters and use the Sea damper
function, be aware that the damping can change with the conditions, it is especially important to follow where the landscape
changes sharply.
Rain and snow noise suppression.
When using this function, never set the suppression level too high. This will mean that all echoes, even those that are not due to
rain or snow, can be attenuated so much that they do not appear on the screen.
When using this function, be sure to use the most appropriate noise suppression function
Target Tracking (TT) function
Use target tracking only as a navigation aid. The crucial decisions about navigation must always be made by the operator.
Navigating only by radar can lead to accidents.
Information about tracked targets, such as vector, target numeric data, and alarms may contain errors. Targets not detected on
the radar cannot be displayed or tracked. Navigating only by radar can lead to accidents such as collisions or grounding.
JMR-5400 User Manual 20201214 temp
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