Operator`s manual

Chapter 3-16 Radar menu
 The guard zone is not available in the secondary radar display in
Dual Radar mode.
IR (Interference Rejection) – will reduce false echoes from other
radars nearby, see section 3.1.10.
Stretch – toggle between AUTO, ON, OFF.
AUTO (default) - small targets are enhanced at ranges above 3 nm.
ON - all targets will be enhanced.
OFF - all targets will remain unchanged.
Rpm – will determine the scanner rotation (full screen presentation).
Manually, the rotation speed can be set to either 24 or *48 rpm,
depending on the scanner type (use +/- keys).
*Running 48 rpm (double update rate) is liable to reduce the lifetime
of the mechanical parts.

DX45 and DX60 scanners only - toggle between HIGH, LOW, AUTO.
HIGH (default) - is preset to 50 rpm.
LOW - is preset to 30 rpm.
AUTO - the rpm will automatically switch between LOW and HIGH
according to the preselected speed value (preset to 10 kn), so the rpm
will stay on LOW at speeds up to 10 knots.
Note! To change the preset values, see Radar setup in section 10.1.
HDG
– your heading will be shown (full screen presentation) in
degrees from connected compass. If no compass is connected, you can
use the course (COG) from the built-in GPS module by changing “Use
COG as internal heading” from NO to YES in the interface setup.
Press [MENU], [8], [2], and then press [PLOT] repeatedly until the
tab reads Compass.
 When using the GPS course as replacement for heading input, the
accuracy will be reduced in relation to speed, wind and current.
Pulse - can be set to SHORT, NORMAL or LONG.
NORMAL (default) will not change the presentation of targets.
SHORT - (press the [-] key to access) will enhance target resolu-
tion at range 0.5-6.0 nm. However, this setting may result in making
some smaller targets disappear.
LONG - (press the [+] key to access) will enlarge targets on screen
and improve target detection. However, this setting will also enlarge
any noise picked up.