6-1
6. Radar
This chapter provides the information necessary for radar operation. The topics in-
clude how to do the following.
• Adjust the gain
• Reduce sea and rain clutter
• Measure the range and bearing to a target
• Reduce radar interference
• Expand echoes
• Set a guard zone
• Understand the radar display
Your radar can be tuned automatically or manually, and automatic is the default meth-
od. For manual tuning, see section 13.5.3.
6.1 How to Transmit, Set the Radar in Stand-by
When the power switch is turned on, the radar begins to warm the magnetron. The
magnetron is the device in the antenna unit which transmits the radar pulses. The ra-
dar takes approximately 1:30 (3:00 for DRS25A) to warm the magnetron. The timer at
the center of the display shows the time left. When the countdown reaches zero (0:00),
"Standby" appears at the center of the screen, which indicates the radar can now
transmit pulses. Long-push the GAIN/TX key to transmit. You can also use the Tx soft
control and Tx in the Radar pop-up menu.)
If you do not require the radar for some time, set the radar in stand-by to save the mag-
netron from unnecessary use. Long-push the GAIN/TX key to switch between transmit
and stand-by.
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