How To Reduce Interference - Furuno TZT9 Operator's Manual

7. FISH FINDER
7.6

How to Reduce Interference

Interference from other fish finders and electrical equipment appears on the screen as
shown in the illustration. When these types of interference appear on the screen, use
the interference rejector to reduce the interference. Turn off the interference rejector
when there is no interference, so that you do not erase weak echoes.
1. Select [Menu] on the menu icon bar to open the main menu.
2. Select [Sounder].
3. Select [Interference Rejection].
4. Select [Low], [Medium], [High] or [Auto]. [High] is the greatest interference rejec-
tion. [Auto] automatically selects suitable interference setting.
5. Select [Close] to exit the menu.
To deactivate the interference rejection, select [Off] at step 5.
7.7 How to Measure Range, Depth or Time to an Ob-
ject
You can measure the depth to an object with the VRM. Also, you can measure the
range and time from the right edge to a location. For example, you can measure how
many minutes ago an echo appeared.
To measure the range, the depth or the time to an object, select an object to display
the VRM. Read the range, the depth and the time in the box.
When you want to see the past echoes which are off the screen, drag the screen to
right. To show the current display, select [Cancel Hist.] at the top right-hand corner of
the screen.
7-10
Interference from
other sounder
Interference from
electrical equipment
Range 299 yd
Depth 292 ft
Time 1'46s
5 0
1 0 0
VRM
1 5 0
2 0 0
2 5 0
3 0 0
New Point
3 5 0
Go To
4 0 0
◄ Frequency
4 5 0
◄ Mode
5 0 0
5 5 0
◄ Adjust
6 0 0
Auto Ra
6 5 0
7 0 0
7 5 0