Furuno 1823C manual Echo Stretch, Types of echo stretch

2. RADAR OPERATION

2.19Echo Stretch

Normally, the reflected echoes from long range targets appear on the display as weaker and smaller blips even though they are compensated by the radar’s internal circuitry. The echo stretch function magnifies these small blips in all ranges. Two types of echo stretch are available: ES LOW which stretches echoes in bearing direction and ES HIGH which stretches them in both range and bearing directions.

Target

	Range
Bearing	direction
	Bearing
direction
	direction

Echo Stretch OFF	"LOW" Echo stretch	"HIGH" Echo stretch
	Types of echo stretch

This function magnifies not only targets but also sea clutter and radar interference. For this reason, be sure sea clutter and radar interference are properly suppressed before activating the echo stretch.

1.If not displayed, press the [HIDE/SHOW] key to show the radar soft keys.

2.Press the SIGNAL PROC. soft key.

3.Press the E. STR soft key to select HIGH, LOW or OFF as appropriate.

4.Press the RETURN soft key to finish.

The display shows ES H (High) or ES L (Low) when the echo stretch is on.

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