Echo Trail Processing: [Trail] Menu - Furuno FAR-2107 Series Service Manual

１ １ １ １ . Echo trail processing: [TRAIL] menu
See page.3-18 for related information on the [TRAIL] box menu. This menu allows the
setting of Trail Mode, Trail Grad, Narrow Trail, Trail Level, Trail Reset, Trail Copy and
OS Trail.
In the setting of echo trail, trail time can be selected as well as the selection between
"True" and "Relative". The trail time can be set in a range between 30 seconds and 30
minutes at 0.5-minute intervals. Trail images are saved for each 7 seconds for a period
of 30 minutes.
- Trail gradation (TRAIL GRAD): Multi gradations
The trail gradation is updated for each 7 seconds in up to 32 gradations.
Accordingly, if the trail elapsed time is 15 seconds, trail is displayed in 2
gradations. If the elapsed time is 30 seconds, it is displayed in 4 gradations, and in
4 minutes or more, in 32 gradations.
- Trail copy
Turn on the setting of Trail Restart (linked with trail rage) and Trail Copy. If the
range change is 3 to 1/3 times relative to the range where the trail is started, all
trails can be displayed promptly. This is because the trail of the previous range is
copied.
When about 10 seconds or more elapses after the range change, the trailing at the
range starts following the copy of the previous trail. If the range is changed to a
range exceeding 3 to 1/3 times the previous range, a new trailing process starts. If
the range is changed to move than 3 times the previous range, the range up to 3
times the previous range is saved. For the range exceeding 3 times or less than 1/3
times, a new trailing process starts. However, if it is returned to the previous range
within 10 seconds, the saved previous trail is displayed.
Changing Range
Trail Copy
7-38
7.3 Processor Unit: RPU-013
Start Trail at changing range