JRC JMR-5410-4X, Instruction Manual

Page: 439 / 688

14-13 Section 14 Adjusting and Setting up Equipment (for Services)
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14
14.2.6 Adjusting MBS
MBS (Main Bang Suppression) adjustment is to adjust a display unit processing circuit in order to
suppress main bang, which is the reflection signal from a microwave transmission circuit of a
waveguide that normally appears as an image of a circle at the centre of the radar screen.
Perform MBS adjustment by using the [MBS] dialogue.
[Operation procedure]
Open the MBS adjustment screen by performing the following menu operations.
[Menu] button
→ Service → Adjustment → MBS
Do not change Initial Level/Area Offset indiscreetly.
If wrong adjustment is performed, the nearest target will be erased, causing collision
to lead to death or serious injury.
14.2.6.1 Performing MBS adjustment
1
Click on the [Initial Level] (MBS initial level) input box.
A numeric value input keyboard is displayed.
2
Enter an initial level of MBS so that the image of main bang becomes optimum (faint
image remains on the screen). (0 to 1023)
For the method of using the numeric value input keyboard, refer to "3.19.2 Names and functions
of the sections of the keyboard".
14.2.6.2 Adjusting an MBS application range
1
Expand the display range up to the range where a main bang can be identified.
2
Click on the [Area Offset] input box.
A numerical value input keyboard is displayed.
3
Adjust the application range so that the main bang adjustment range becomes the
optimum (distance where only the main bang section becomes the MBS adjustment
range) (-0.200 NM ~ 0.200 NM).
Adjust the range together with the MBS adjustment to the degree where the nearest target will
not be lost.
For the method of using the numerical value input keyboard, refer to “3.19.2 Name and function
of each section of the keyboard”.