JRC JMA-5104, Инструкция по эксплуатации, Страница: 86 / 242

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TRAIL INTERVAL 6M
TRAIL REF LVL 8
RANGE TRAIL 0.0NM
CLEAR OFF
KEEP CLEAR
TRAILS
3.5.10 Using the target expansion function [MENU]
The image expansion function extends the images of echoes on the PPI screen into the angle
direction and distance direction.
Caution
● ● ● ●
When the image expansion function is used, the echoes of two targets that are
close to each other in the distance direction (ahead/behind) and angle direction
may turn into a single image on the PPI screen.
1. Setting the target expansion function
Take the following steps to set the target expansion function:
(a) Press
the
[MENU]
key to display MENU .
(b) Select BASIC and then TGT EXPANSION pressing the
[JOG DIAL]
or
[ACQ/ENT]
key after each selection.
(c) The menu below is displayed. Turn
[JOG DIAL]
to select ON , and then press the
[JOG
DIAL]
or
[ACQ/ENT]
key to determine the selection.
2. Canceling the target expansion function
To cancel the target expansion function, take the above steps changing step (c) as follows:.
In step (c) above, select OFF , and then press the
[JOG DIAL]
or
[ACQ/ENT]
key to determine
the selection.
3.5.11 Changing the transmitter pulse length [GAIN/PL]
The transmitter pulse length can be changed in the range of 1.5, 3, or 6 nautical miles.
If a long pulse is selected, the images of echoes on the PPI screen are lengthened in the distance
direction. Conversely, if a short pulse is selected, the images are displayed reduced in size
(length).
Unlike the image expansion function, the above function displays the echoes when a pulse
becomes longer that have not been displayed previously.
Caution
● ● ● ●
When a longer pulse is selected, the echoes of two targets that are close to each
other in the distance direction (ahead/behind) may turn into a single image on
the PPI screen.