JRC JMA-7710-6 Instruction Manual page 189

5.9
Determining the setting value
Set the range to 3 to 6 miles and increase the video level watching the test video on the
screen. Then check the video level in which the test video (VDG) is not issued due to
noise. Finally, set the video level to a larger value by 4 or 5 than the video level that was
checked in the above operation procedure as an appropriate video level so that the test
video cannot be issued due to noise. For example, when the video level is 20, set 20 + 4 =
24 as an optimum video level.
Exit
8. Press the
Exit
Test videos (VDG) caused by
sea clutter or noise appear.
ATA TEST
ATA TEST
1. TEST VIDEO
2. VECTOR CONST
3. VIDEO TD LEVEL
4. VIDEO HIGH LEVEL
5. VIDEO LOW LEVEL
6. GATE SIZE
7. ATA NOISE LEVEL
8. ATA FTC LEVEL
SUB
key.
MENU
Noise
Target
VDG VDH VDL
7
2 4
1 8
6
NORMAL SMALL
220
214
5 – 27
Target
Noise
Test videos are seen only
far away from targets.
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