Koden MDC-2200 series, Руководство по установке

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Chapter 4 Setup after installation MDC-2200/2500 Series
4-4 0092625002-06
4.2.1.2 Setup of STC curve
The anti-clutter sea effect varies according to the antenna height. In that case the STC curve
should be adjusted according to the position where the antenna has been mounted and the
adjustment should be carried out in accordance with the following procedures.
Note: STC curve adjustment procedure should be done after the gain adjustment. STC curve
tuning should be done in open sea where sea clutter can be observed on the radar screen.
(1) Set the gain knob to 8, sea knob to 0, and rain knob to 0 and noisy sea clutter as shown in
Figure 4.2 will appear in the center of the screen.
Figure 4.2 Picture of sea clutter echo
(2) Select the range so that all of sea clutter echo can be shown on the screen.
(3) Adjust SEA knob and stop the operation of the knob just before the sea clutter echo has
completely suppressed (in the status under which sea clutter echo is scattered). As shown in
Figure 4.3 “Proper”, when sea clutter echo is uniformly in the screen and start fading, the setup
value of STC curve is proper. When sea clutter echo in short-range area starts fading at the
beginning as shown in Figure 4.3 “Too large”, or when sea clutter echo in long-range area
starts fading at the beginning as shown in figure 4.3 “Too small”, STC curve adjustment should
be carried out to set at the proper value by the steps below:
Figure 4.3 Example of adjusting STC curve value
STC curve value too small
STC curve value proper
STC curve value too large