Installation Instructions

STC (Sensitivity Time Control)

Since echo signals received by the radar are strong when they are coming from a short

distance, it is difficult to compare signal strength between each reflected signal. To over-

come this difficulty, signal strength is adjusted in such a way that the received signal levels

coming from a short distance are lowered and those from a long distance are raised. This

function should prove useful when there are large reflected waves from sea surfaces during

rough weather.

FTC (Fast Time Constant)

When it rains or snows, fine noise may appear over the entire screen, making it diffi-

cult to identify echoes. In such a case, echo images on the screen can be made easily distin-

guishable by adjusting FTC.

0.75

0.25

STC OFF STC ON

0.75

0.25

Echo is suppressed

around center

Fig.2-13 STC

0.75

0.25

FTC OFF FTC ON

0.75

0.25

Small noises

are reduced.

Fig.2-14 FTC