Furuno FR-1500 MARK-3, User Manual

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-1.1-
1 OPERATIONAL OVERVIEW
1.1 Turning on the Power
The [POWER] switch is located at the left corner of the display unit. Push it to switch on the radar
set. To turn off the radar, push it again. The screen shows the bearing scale and digital timer
approximately 15 seconds after power-on. The timer counts down three minutes of warm-up time.
During this period the magnetron, that is, the transmitter tube, is warmed for transmission. When
the timer has reached 0:00, the indication STBY appears, indicating that the radar is now ready to
transmit pulses.
Switch S2
Notice for technicians
The display unit designed to run on AC voltage
has a switch (S2) at its rear to cut off 115/230 V
supply from internal circuits. Thus, the radar will
not operate when this switch is turned off. Keep it
in the ON position.
1.2 Transmitter ON
After the power is turned on and the magnetron has warmed up, STBY appears at the screen
center, indicating the radar is ready to transmit radar pulses. Press the [STBY/TX] key to transmit.
When you won’t be using the radar for an extended period, but you want to keep it in a state of
readiness, place it in standby by pressing the [STBY/TX] key. The display
shows STBY.
Video Freeze-up Recovery
Video freeze-up or lock-up can occur unexpectedly on any digital rasterscan radars. This is
mainly caused by heavy spike noise in the power line and can be noticed by carefully watching
the nearly visible sweep line. If you suspect that the picture is not updated every scan of the
antenna or no key entry is accepted notwithstanding the apparently normal pictures, do Quick
Start to restore normal operation.
.1 Turn off the Power Switch and within 10 seconds turn it on again.
.2 Press the Transmit switch labeled STBY/TX for transmit condition.
POWER
switch