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3.2  Power-on Operation 
3.2.1 Power-on and start 
1.  Turning on the power [STBY] 
To turn on the power, press the [STBY] key. 
When the power is turned on, the countdown timer is displayed on the screen, and the standby 
state is placed after 1 minute and 30 seconds. 
The total duty time and total transmitting time are displayed.    Refer to the time display when 
carrying out maintenance work.    The time display includes a slight error. 
2. Transmitting [TX/PRF] 
To transmit data from the standby state, press the [TX/PRF] key. 
To change the transmitting state back to the standby state, press the [STBY] key. 
3.2.2 Tuning [AUTO-TUNE] 
This radar can be tuned manually or automatically.  To switch between manual tuning and 
automatic tuning, press the [AUTO-TUNE] control key.    When automatic tuning is selected, "A" is 
displayed to the left of the tuning indicator at the right bottom of the screen. 
1.  Switching the tuning mode 
If manual tuning is currently selected, pressing the [AUTO-TUNE] control key changes to 
automatic tuning.  If automatic tuning is currently selected, pressing the key changes to 
manual turning.  The automatic tuning mode and manual tuning mode are switched back 
and forth each time the key is pressed. 
2.  Turning the tuning control [AUTO-TUNE] 
If manual tuning is currently selected, enlarge the image by turning the tuning control on the 
keyboard.  The tuning indicator serves as a rule of thumb for manual tuning.  Adjust the 
image so that the pointer of the indicator reads the maximum value. 
Automatic tuning does not need the turning of the tuning control. 
If no image appears, turn the sensitivity control on the keyboard fully to the right, and turn the 
sea clutter control and the rain/snow clutter control fully to the left. 
3.2.3  Observation and image adjustment [+RANGE-] 
Display the optimum image by turning the tuning control (if manual tuning is selected), 
sensitivity control, sea clutter control, and rain/snow clutter control on the keyboard. 
The image observation range can be changed by pressing the [+RANGE-] key. 
The currently selected range is displayed at the upper left of the screen.    (See 2.2, "Description of 
Screen Display.") 
3.2.4  Data acquisition and measuring 
For each operation, see 3.4, "Basic Operation" and Chapter 4, "Interpret the PPI Screen."