Samyung SMR-3700 Manual
Also see for SMR-3700: User manual
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Contents
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245.3. Wave Path In case there is an obstruction in the course of wave path like Mountain, Rain and Snow, the target behindof them may not be observed.우설과 산으로 가려져 물표가나타나지 않음5.3.1. Reflection of sea level On the sea surface where are made, white and broad images are displayed on the screen center. This is areflection created from the sea level and occurs as a different image mainly depending on the size of save,range and the direction of wind.5.3.2. False Image There is a possibility that non-existing targets may be shown or any existing targets may not be shownthrough the image. This image is called ‘virtual image’.What mainly causes such false image as follows;(1) Shadow Depending on the installation position of antenna, the reflection may come back after colliding against thefunnel or mast, which may create ‘shadow’ causing the virtual image on PPI screen. In this case, the targetsthat are located at the shodow direction may not be shown on the screen.The existence of such a ‘shadow’ can be figured out by checking if there is any dim image or any unseenpart, based on the reflection of sea level.If the ‘shadow’ occurs, the user needs to memorize the direction in order to observe the targets with care.(2) Side echo There may be an image of arc wave line in the same distance from target image on the screen. This iscaused by the side lobe of which beam is radiated from the antenna.For this phase, it is easy to make a judgment when targets are fixed.(3) Secondary reflection Fake images may be displayed as their directions are changed through being reflected against the funnelor mast, which create shadow.In this case, the images of targets are located at the mast direction that reflects the radar wave.(4) Multi-reflection image Where there are any structures or big-sized vessels that are hidden behind gigantic vertical line, multipleimages by multi-reflection appear.These images come out at intervals of every lamp line and among the lines, the closest line to the own shipis the actual image of target.(5) Radar interference If there is any radars closely located that uses the same frequency, the interference image by the radarappears on PPI screen. This interference turns into various spots and appear in forms of many images but asthe interference does not appear in the same place, it can be distinguished from target image.For the radar interference(‘ ’ button), select『ON』in the function to diminish or get rid of it.The target does not appear due toSNOW and Mountain. |
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