Si-tex T-760 Series, Instruction Manual

Page: 94 / 252

Chapter 3 ADJUST THE RADAR ECHO
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FOR REFERENCE
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In order to obtain an accurate radar echo, sea clutter suppression adjustment and gain
adjustment are essential.
RAIN:
Normally is set to “0”. But in the case of rain or snow, you need use the rain clutter
suppression function to remove the noise appearing on the screen.
GAIN:
Adjust the GAIN to increase receiving sensitivity, then the radar observation range can
be extended. If the sensitivity is set too high, the receiver noise is increase, and the contrast
between the targets and the background video is reduced. As a result, the targets become
obscure on the radar display. To observe densely crowded targets or short-range targets,
adjust the GAIN to reduce the sensitivity so that the targets are easy to observe. However, be
careful not to overlook important small targets.
SEA:
SEA clutter suppression function can suppress the near range clutter noise. If the
suitable adjustment is done, you can observe a clear target from short range to long range.
When the automatic mode is selected for the rain/snow clutter suppression function, the sea
clutter suppression function is switched to the manual mode. The sea clutter suppression
function (Auto) and the rain/snow suppression function (Auto) cannot be selected at the same
time.
ACTUAL OPERATION
Set RAIN clutter suppression level to 0
(1) Set RANGE to 6NM, and determine the target in the distance.
Set GAIN in order to observe the target clearly.
(2) Change RANGE to 0.5NM, and set SEA clutter suppression level to observe the near
target clearly.
(3) Since the rain/snow clutter suppression function also has the effect of suppressing sea
clutter, the suppression efficiency improves when using with the [SEA] control. In general,
RAIN clutter suppression level is set to “0”. But if you encounter a bad
weather, set RAIN
clutter suppression level to achieve better observation state.