JRC JMR-5410-4X, Instruction Manual

Page: 220 / 688

Section 5 Basic Operation of the Radar 5-6
5.3.4 Adjusting gain
Be sure to always adjust for the best gain.
If the gain is too high, undesired signals including receiver noise and false echoes
increase resulting in reduction of visibility of targets. Otherwise, accidents may result.
On the contrary, if the gain is too low, targets including ships and dangerous objects
may not be clearly indicated.
Adjust the gain of the radar.
Memo
Set the optimum gain when making adjustments, giving consideration to the setting described in
"5.3.7 Adjusting to optimal images (Selection of observation scenes)".
1
Drag the [Gain] (reception gain adjustment) slider dial in Radar signal information,
turn the trackball, and set up reception gain.
Moving the slider to the right increases gain.
Moving the slider to the left decreases gain.
The current reception gain level is indicated by the bar and a numeric value.
[Points on adjustments]
As reception gain is increased, the range in which radar images can be observed widens; however, if
gain is increased too high, receiver noise, false echoes and other undesired signals will increase on
the screen, lowering the visibility of targets.
Also, it gets easier to see the screen display if gain is decreased to observe cluttered targets and close
range, but be careful not to overlook small targets.
Memo
If the optimal setting value was lost, it is recommended to reset to
the initial value and tune up again.
The initial setting value is indicated as shown in the figure at right.
Initial setting value
Current reception gain
[Gain] (reception gain adjustment) slider