Zoom Displays - Furuno TZT9 Operator's Manual

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.
Tap the sounder scale box to switch between high and low frequencies.
Bottom lock display
The bottom lock display provides a compressed normal picture on the right half and a
7 to 400 feet (2 to 120 meter) wide layer in contact with the bottom is expanded on the
left half. This display helps you separate the fish near the bottom from the bottom
echo. You can select the bottom lock range with [Bottom Lock Range Span] in [Sound-
er] of the main menu.
Zoomed
school of fish
Bottom lock/Low frequency
Bottom zoom/Low frequency
Bottom lock display
156 300
BL LF
Bottom lock/High frequency
Bottom zoom/High frequency
Single freq. display
Bottom shown as a straight line
7. FISH FINDER
School of fish
Zoom marker
This area zoomed
and displayed on
left 1/2 of screen.
7-3