Turning The Radar On/Off; Transmitting; Stand-By; Selecting The Range - Furuno 1761 MARK-3 Operator's Manual

2.2 Turning the Radar On/Off

After confirming there are no crew near the
scanner unit, press the [POWER] key to turn
on the power.
The front panel will light up. The magnetron
takes about two minutes and thirty seconds
to warm up before the radar can be oper-
ated. The time remaining for warm up of the
magnetron appears at the center of the dis-
play, counting down from 2:29 to 0:01.
To turn off the radar, press the [POWER] and
[TX] key together.

2.3 Transmitting

After the power is turned on and the magne-
tron has warmed up, the message "ST-BY"
(Stand-By) appears at the center of the dis-
play, showing the radar is ready to transmit.
However, no targets will appear on the screen
until the radar is transmitting by pressing the
[TX] key (TX is short for "transmit). In stand-
by the radar is available for use at anytime -
but no radar waves are being transmit.

2.4 Stand-by

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 stand-by by
pressing the [TX] key. The display shows
"STBY," (default setting) or goes into the
economy mode. (You can select stand-by
condition on the menu. )
Economy mode
The CRT can be set to automatically turn it-
self off when in stand-by, to reduce power
consumption. This feature is called the
"economy mode". When the economy mode
is on, the "ECONOMY" indication under the
[TX] key lights.
2-2

2.5 Selecting the Range

The range selected automatically determines
the fixed range ring interval, the number of
fixed range rings, pulselength, and pulse rep-
etition rate, for optimal detection in short to
long ranges. The range and ring interval ap-
pear at the top left corner of the display.
Selecting the range
Press the [- RANGE +] key. The range and
range ring interval appear at the top left cor-
ner on the display.
Tips for selecting the range
• When navigating in or around crowded
harbors, select a short range to watch for
possible collision situation.
• If you select a lower range while on open
water, increase the range occasionally to
watch for vessels that may be heading
your way.
2.6 Adjusting Picture
Brilliance
The [BRILL] key adjusts the brilliance of the
radar picture in eight levels.
Press the [BRILL] key to set the brilliance
level.
2.7 Adjusting Receiver
Sensitivity
The [GAIN] control adjusts the sensitivity of
the receiver. It works in precisely the same
manner as the volume control of a broadcast
receiver, amplifying the signals received.
The proper setting is such that the back-
ground noise is just visible on the screen. If
you set up noise is just visible on the screen.
If you set up for too little sensitivity, weak
echoes may be missed. On the other hand
excessive sensitivity yields too much back-
ground noise; strong targets may be missed
because of the poor contrast between desired