Dual Frequency Display; Zoom Displays - Furuno TZT9 Operator's Manual

7.2.2

Dual frequency display

The dual frequency display provides both low and high frequency pictures. Use the
dual frequency display to compare the same picture with two different sounding fre-
quencies.
Low
frequency
156 300
LF HF
How to select the dual frequency display
Select [Mode] from the RotoKey menu then select [Dual Freq.].
How to reverse the display pictures between low and high frequencies
In the default setting, the low frequency picture is on the left, and the high frequency
is on the right. To reverse the pictures between low and high frequencies, select [Fre-
quency] from the RotoKey menu then select [LF]. The picture for the frequency option
([HF] or [LF]) selected here is displayed on the right.
7.2.3

Zoom displays

Zoom mode expands selected area of the single frequency picture. Two modes are
available: bottom lock and bottom zoom.
How to activate a zoom display
1. Select [Mode] from the RotoKey menu.
2. Select [Btm Lock] or [Btm Zoom].
To quit the zoom display and go to the single frequency display, select [Mode] from
the RotoKey menu then select [Single Freq.].
You can switch the frequency for the zoom displays by tapping the sounder scale box
at the bottom left-hand corner of the screen.
Bottom lock/Low frequency
Depth
Bottom zoom/Low frequency
Depth
For TZTBB, tap the area circumscribed above to
Note: You can change the range by tapping the depth (see paragraph 7.4.2).
High
frequency
Sounder scale box
Sounder scale box
Freq.
Beamwidth Resolution
(kHz)
Low Wide Low
High Narrow High
Bottom lock/High frequency
Depth
Sounder scale box
Bottom zoom/High frequency
Depth
Sounder scale box
switch between high and low
7. FISH FINDER
Detection Bottom
range tail
Deep Long
Shallow Short
frequencies.
7-3