Operations Manual
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TABLE OF CONTENTS
Section 1: INSTALLATION PREPARATION . . . . . . . . . . . . . . . 2
Parts Supplied . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Installation Overview . . . . . . . . . . . . . . . . . . . . . . . . . 2
Alternative Transducers and Mounting Methods. . . . . . 4
Transducer Exchange . . . . . . . . . . . . . . . . . . . . . . . . . 5
Section 2: USING THE 450TX. . . . . . . . . . . . . . . . . . . . . . . 6
How Sonar Works . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Simulator Operation . . . . . . . . . . . . . . . . . . . . . . . . . . 7
What You See On Screen . . . . . . . . . . . . . . . . . . . . . . 8
Control Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Menu Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Section 3: ADVANCED FEATURES. . . . . . . . . . . . . . . . . . . 26
Using Diagnostic . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Using Alternative Transducers . . . . . . . . . . . . . . . . . . 29
Section 5: MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . 31
Maintenance and Troubleshooting. . . . . . . . . . . . . . . 31
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
PN530977-1 Rev. 11015E
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INSTALLATION PREPARATION
PARTS SUPPLIED
PARTS SUPPLIED
Before installing your 450TX, please ensure the following parts are included
in the box:
• 450TX fishfinder
• Transducer with 6m (20') of cable and mounting hardware kit
• Mounting system and mounting hardware kit
• 2m (6') power cable
• Publications kit
If any of these items is missing, contact your local distributor.
ACCESSORIES
Humminbird offers a wide assortment of accessories that complement and
expand the capability of your new 450TX. These accessories are designed
with the same high standards and are backed by the same one-year
warranty. The Humminbird Accessory catalog included with your unit
contains descriptions of the many accessories available and ordering
information. All Humminbird accessories are available through your full-
service Humminbird dealer.
INSTALLATION OVERVIEW
The 450TX consists of two primary components to install: the control head
and the transducer.
The control head contains the sonar transmit and receive circuitry, as well
as the user controls and display. It should be installed in a location that
provides access to the controls and visibility while in use. The control head
mounts on a quick disconnect mounting system that swivels and tilts
providing flexibility for viewing from almost anywhere on the boat.
The transducer converts electrical energy from the transmitter into
mechanical pulses or sound waves. The transducer also receives the
reflected sound waves and converts them back into electrical signals for
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INSTALLATION PREPARATION
INSTALLATION OVERVIEW
display on the control head. It should be installed in contact with the
surface of the water in an area that has smooth water flow - usually on the
transom of the boat. There are several mounting options for the
transducer. Review the following section to determine the method that
works for you and your boat.
Determining How to Mount the Transducer
The 450TX includes a model XT-6-TB-90
transducer. This transducer can be
mounted on the transom of the boat, or
bonded to the inside of a fiberglass hull
boat.
The transom installation, which is the
most widely used, places the transducer
on the outside of the boat hull. This
technique produces the least signal loss,
and provides a way to adjust the
transducer after installation. The
mounting hardware included is designed
to protect both the boat and the
Transom Mounted Transducer
transducer should the boat strike debris
in the water or when trailering.
As an alternative to transom
mounting, it is possible on many
fiberglass-hulled boats to glue the
transducer on the inside of the boat
hull. Since fiberglass has similar sonar
characteristics as water, the sonar
signal can pass through the boat hull
with minimal loss. The hull of the
boat must be single layer
construction (not double-hulled).
Also, any air trapped in the
lamination of the fiberglass would
prevent the sonar signal from passing
through.
Inside the Hull Mounted Transducer
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3
INSTALLATION PREPARATION
ALTERNATE TRANSDUCERS AND MOUNTING METHODS
Inside the hull installations require no holes be drilled into the boat and
through experimentation, high-speed operation comparable to transom
mounting can be achieved. Two part, slow cure epoxy is required to glue
the transducer in place.
ALTERNATE TRANSDUCERS AND MOUNTING METHODS
The 450TX comes with everything necessary for installation and operation
on most boats. However, there are several situations which may require a
different type of transducer. Inboard boats, wood or metal hulls, and sail
boats create unique transducer mounting needs. Alternate transducers and
mounting methods are detailed below.
Portable Mounting
The standard transducer can be adapted for
portable installations using part number
MHX-PT2. This accessory adapts your trans-
ducer to a suction cup mount for temporary
installation on the boat hull or other surface.
Trolling Motor Mounting
The standard transducer can also be adapted
to mount on most trolling motors using part
number AD-STM-7. This accessory includes a
bracket and hose clamp that allows mounting
the transducer to the body of most trolling
motors.
Thru-Hull Mounting
Thru-hull transducers install through a hole
drilled in the hull of the boat. Larger boats or
boats with inboard motors create turbulence
that make transom mounting ineffective.
Also, hulls that are very thick or are double
layered, or made from materials such as
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INSTALLATION PREPARATION
TRANSDUCER EXCHANGE
wood or metal, (which do not conduct sonar signals) make inside the hull
mounting inadvisable.
Thru-hull mounting may require the use of a fairing block to level the
transducer with the waterline. Also, since special tools and knowledge may
be required to perform this type of installation it is best to refer to a
qualified marine technician.
TRANSDUCER EXCHANGE
Other transducers are available as replacements for the standard
transducer. You may exchange your new and unassembled transducer for
another type by returning it to your local distributor. Some transducers may
have additional costs. Refer to the Accessory catalog or contact your local
distributor.
BEGINNING INSTALLATION
Now that you have determined the transducer mounting method, you can
begin installation of the 450TX. The fold out installation guide included
provides detailed step by step instructions for installation of the control
head and transducer. For transom mount transducer installations, you will
need the mounting template at the front of this manual.
In addition to the parts included you need the following for installation and
operation:
• A powered hand drill and various drill bits
• Phillips and flat-head screw drivers
• A ruler or measuring tape
• Pen or pencil
• 12 volt power source (your boat’s battery)
• A 1-amp fuse
• A fuse holder (if you are wiring directly to the boat’s battery)
• Silicone sealant (for sealing drilled holes)
• 2-part, slow-cure epoxy (for inside the hull transducer installations)
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USING THE 450TX
HOW SONAR WORKS
HOW SONAR WORKS
Your Humminbird unit uses sonar to
locate and define underwater objects,
define the bottom terrain, as well as
determine distance.
Sonar technology is based on sound
waves. Your Humminbird unit sends
out a sound wave signal. With this
signal it determines distance by
measuring the time between the
transmission of the sound wave and
when the sound wave is reflected off
an object. Your Humminbird uses the
reflected signal to interpret location,
size and composition of an object.
Sonar is very fast. A sound wave can travel from the surface to a depth of
70m (240') and back again in less than ¹⁄₄ of a second. It is unlikely that
your boat can "outrun" this sonar signal.
The 450TX is a dual frequency, tri-beam unit, and generates three distinct
sonar signals - one narrow, two wide. Each signal is optimized for a
particular purpose. First, the center beam transmits at a frequency of 200
kHz in a 20 degree (narrow) symmetrical pattern for greater depth
capability and excellent detail. Information from this center beam is used to
draw the graphic representation of the bottom on the display.
The left and right beams are generated at 455 kHz for increased sonar
resolution and are shaped in an elliptical pattern for greater area of
coverage. Information from these two beams in conjunction with the
center beam is used to accurately detect the presence and location of fish.
The combination of the three beams and dual frequencies, provides the
best possible combination of a large area of coverage and a high level of
detail.
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USING THE 450TX
SIMULATOR OPERATION
Actual depth capability depends on factors such as bottom hardness, water
conditions, and transducer installation. Units will typically read to deeper
depths in fresh water than in salt water
SIMULATOR OPERATION
The 450TX contains a simulator that allows
you to use the unit as if you are on the
water. The simulator is invaluable for
learning how to operate the 450TX.
There are two ways to start the simulator. If
the unit is powered off, press and hold the
POWER button for approximately three
seconds until you hear a continuous chirp.
The simulator can also be started by selecting the
Simulator option on the start-up screen after you
power-up the unit. When this screen is shown,
simply press the DOWN ARROW until “Simulator”
is highlighted. When the screen times out, the unit
will be in simulator mode.
Once the Simulator mode is selected, the next
screen will allow you to select either “down”
simulator or “side” simulator. The “down” selection simulates normal
operation of the unit with the Tri-beam transducer connected. “Down”
simulator is the default setting, so if no adjustment is made, the down
simulator will be selected. The “side” simulator simulates operation with a
Wide Side transducer connected. This is an excellent way to see if you like
the way the unit works using the optional Wide Side transducer.
When in simulator operation, the 450TX responds to control inputs as if it
is in actual operation, so feel free to experiment, or to customize the unit
for your particular operation.
To exit Simulator mode, power the unit off.
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USING THE 450TX
WHAT YOU SEE ON-SCREEN
FEATURE MEMORY
If your 450TX is installed with a transducer connected, any changes you
make to the set-up or User Options (see Control Functions) while in
Simulator are retained in the unit’s memory. This allows you to use
simulator to experiment with the various set-up options, and retain your
selected settings for normal operation.
If you are using the 450TX in Simulator when no transducer is connected,
any selected options are lost when the unit is powered off. The 450TX will
return to Factory Settings, or options selected when last used with a
transducer, if no transducer is connected.
IMPORTANT: A transducer must be connected to the 450TX in
order to retain user settings selected when in simulator mode. If
no transducer is detected, the unit defaults to pre-selected
options when powered off.
What You See On-Screen
Your 450TX uses a 160 x 160 matrix FSTN LCD display. This display provides
outstanding viewability in all light conditions over a wide range of
temperatures.
At initial power-up, the 450TX uses settings that were set at the factory.
After initial use, the 450TX will remember the settings you enter.
Figure A
There are several elements
on-screen that are common
to all modes of operation.
Temperature/Speed. The
initial screen layout takes one
of two basic forms depending
on whether the optional
Temp/Speed accessory is
installed. Figure A shows the
default view when the
Temp/Speed accessory is
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USING THE 450TX
WHAT YOU SEE ON-SCREEN
Bottom Depiction
Zero Line
installed. Figure B shows the
default view when the
Temp/Speed accessory is not
installed.
Depth. The digital depth number
shows the water depth directly
beneath the transducer location.
Depth Range. The depth range
is shown to the right of the
screen. The upper number is 0
indicating the surface of the
water. The lower number is one
of the nine depth ranges available
that best match the depth of the
m
Water Depth
Depth Range
Figure B
water. As the depth of the water changes, the range changes as necessary
in order to retain a bottom representation on-screen.
When in Auto mode, the horizontal line at the top of the screen is the
“zero line,” representing the surface of the water. Occasionally there is a
gap in this line. This gap indicates
the unit is updating the display
Surface Clutter
Rocky Bottom
even if the bottom is not visible
on-screen, or if the bottom
information is not changing.
New sonar information appears on
the right side of the graphic area of
the display and moves to the left as
new information is displayed. The
450TX automatically selects the
appropriate depth range to show the
depth of water beneath the
transducer. This range is selected so
the bottom representation is typically
shown about ²⁄₃ down the display.
Hard Bottom Soft Bottom
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USING THE 450TX
WHAT YOU SEE ON SCREEN
Bottom. The graphic depiction of the bottom provides the user with an
effective tool for understanding the composition of the bottom. The FSTN
type display uses 4 discrete levels of gray to indicate the intensity of the
returned sonar signal. The 450TX can display even the smallest sonar
returns with light gray pixels. Larger returns are displayed with darker
shades of gray. If the bottom is hard and smooth, the bottom depiction is
narrow and dense. If the bottom is soft mud or sand, the depiction will be
thick and less dense. This indicates that much of the signal is absorbed by
the soft bottom. If the bottom is rocky or rugged in composition, the
depiction is of varying density and textured in appearance.
Wave action also affects the bottom depiction. The information drawn is a
distance measurement, so if the boat is moving up and down over flat
bottom, the bottom depiction often appears in regular variations that match
wave timing.
Structure. Structure is defined as any object physically attached to the
bottom. The sonar configuration of the 450TX is optimized to give the most
accurate depiction of bottom structure possible. Grass, trees, stumps,
wrecks or other debris are accurately displayed, however the depiction of
these objects varies with boat speed and direction. The best way to learn to
interpret structure is to operate the 450TX over a variety of known
conditions and experiment with user functions to best represent those
conditions on-screen.
Surface Clutter. Surface clutter is the layer of water near the surface that
is rich in algae and other growth, and often is aerated by wind or wave
Thermocline Second Return
action. This area of water
interferes
transmission
with
and
sonar
often
appears on-screen as regular
clusters of individual dots near
the “0” line.
Thermoclines. Thermoclines
are sharp differences in water
temperature. These are easily
identified by the continuous
nature of the return.
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USING THE 450TX
CONTROL FUNCTIONS
Second Returns. When a sonar signal is reflected off the bottom back to
the transducer, there is often enough energy left in the signal to be reflected
off the surface of the water back to the bottom a second time. Second
returns appear as a slightly weaker bottom representation exactly twice the
depth of the primary bottom return. The second return is most likely to
occur in shallow water and in areas of relatively hard bottom.
Fish ID. The 450TX uses advanced signal processing to further evaluate any
sonar return between the surface and the bottom. For instance, a small
school of bait fish usually appears as a dense cluster of individual dots. If the
return meets certain additional
Fish in Left Beam
Fish in Right Beam
criteria, a fish symbol will be
assigned. There are three
different size fish symbols used
to indicate the intensity of the
sonar return. While signal
intensity is a good indicator of
relative fish size, different
species of fish have different
sonar characteristics, so it is not
always possible to distinguish
fish size between varying
species. The signal intensity is
"normalized" for depth so that
a small fish close to the boat
does not appear as a large fish symbol.
ID+ Fish Depth
Fish in Center Beam
+
ID adds an additional piece of information to help the user locate fish. On
selected fish symbols, the digital depth of the designated fish is drawn to help
locate the fish vertically. This is especially helpful in setting bait depths or for
downrigger operation.
The specific fish symbol indicates the type of sonar beam the fish is detected
in. This gives you a reliable indicator of side to side location relative to boat
movement. Fish symbols which are hollow are detected in the outside two
beams. Hollow fish symbols facing to the right are in the right beam and
therefore are to the right side of the boat (as viewed from the driver seat facing
forward). Hollow fish symbols facing to the left are detected in the left beam,
and thus the fish is to the left side of the boat. Solid fish symbols represent fish
in the single center beam, and these fish are directly under the boat.
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USING THE 450TX
CONTROL FUNCTIONS
CONTROL FUNCTIONS
The 450TX uses a simple six button keypad for all user input. Press any button
and an audible “chirp” confirms the control input. If a button has no
function or is inappropriate for the situation, an audible “error” is heard. The
unit sounds multiple chirps.
Power. The Power button powers the 450TX up for normal
operation. When the unit is on, POWER turns the unit off.
POWER can also be used to go directly into Simulator mode.
To enter simulator, with the unit powered off, press and hold
POWER for several seconds until a continuous chirp is heard.
Light. LIGHT controls the unit’s display backlight. With the
unit powered on, press LIGHT once to turn the backlight on
“low.” Press LIGHT a second time to turn the backlight on
“medium,” a third time to turn the backlight on “high”, and
a fourth time to turn the backlight off. The backlight is very
effective for low-light and nighttime operation. When the
backlight is on, the 450TX will consume more power than
with the backlight off. This is important when using the 450TX in a portable
configuration powered by a separate battery, or when powering the unit
from a trolling motor battery.
When powering the unit from a battery such as in portable
applications, you can prolong the battery life by using the
backlight at a minimum.
The three lower buttons, MENU, UP ARROW, and DOWN ARROW work
together to control the 450TX menu-controlled user functions.
View. VIEW selects one of several screen configurations or “views” possible
depending on the transducer in use. When using the standard (Tri-beam)
transducer, without the optional speed/temp sensor connected, the VIEW
button toggles the display between the full-screen 2D View and the Large
Digital Readout View.
The 2D View is the default view, and the view which is first seen at power-
up. Pressing VIEW again will select the Large Digital Readout View, which
increases the size of key digital information so that it can be viewed from a
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USING THE 450TX
CONTROL FUNCTIONS
2d View
great distance. Normal 2D
information is displayed on the
right side of the display. Pressing
VIEW again will toggle the display
back to the 2D view.
When using the standard (Tri-
beam) transducer, with the
optional
speed/temp
sensor
connected, the VIEW button
toggles the display between the
full-screen 2D View, the Chart View
and the Large Digital Readout
View.
Large Digit View
The Chart View, shows only the
digital depth readout, leaving more
screen area for fish location and
bottom depiction.
If a Wide Side transducer is being
used (see Using Alternative
Transducers), the VIEW button is
used to select one of four views
available: Both, Left, Right, and
Down. You can select “side”
simulator to view this presentation
even if a Wide Side transducer is
not connected.
Chart View
Menu. MENU displays a menu on-
screen for adjustment. In normal
operation,
pressing
MENU
repeatedly cycles through all
available menus. A menu remains
on-screen for several seconds, and
can be adjusted by using the
ARROW keys. If no adjustment is
made in the allotted time, the
m
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USING THE 450TX
CONTROL FUNCTIONS
Menu
menu disappears. If you want the menu to
remain on-screen longer press and hold
MENU—the menu will remain on-screen
indefinitely. Once you release the menu
button, the screen will time out. Once a menu
times out, it is still considered the active menu.
Press MENU to bring up the last menu used.
Arrow Keys. The UP ARROW and DOWN ARROW make
adjustments to menu functions. On the left side of every
menu there are UP ARROW and DOWN ARROW symbols.
The symbols indicate which ARROW button has a function
in a particular situation. Either one or both ARROW buttons
Abbreviated Menu
can be used to adjust the menu function. A hollow ARROW symbol means
the corresponding ARROW button has no function. Pressing that button will
result in no adjustment and the “error” audible will be heard. A solid ARROW
symbol means the corresponding ARROW button can be used to affect the
menu adjustment.
The ARROW buttons often can be used when no menu is on-screen. In these
situations, pressing the ARROW button affects the function of the active
(last-used) menu. This is a short-cut to menu operation. An abbreviated
menu appears on-screen while the adjustment is made and times out. A
frequently used menu can be adjusted very quickly using this technique.
After an adjustment is made to a menu function, the menu times out after a
few seconds and the unit returns to normal operation.
Menu Layout. All menus use the same basic layout. The heading at the top
describes the menu function. The UP ARROW and DOWN ARROW symbols
to the left of the menu indicate which buttons are available for adjustment.
In menus that have several possible settings, a range of adjustment indicator
shows the total range available and the current setting.
Within the menu are the options available. The selected option or current
setting is highlighted in the black box. If no adjustment is made, this is the
selected setting. Press an ARROW button while the menu is displayed to
select another option.
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USING THE 450TX
MENU FUNCTIONS
Heading
Up Arrow Option
Arrow Symbols
Selected Setting
Down Arrow Option
Range of Adjustment Indicator
Several of the menus are multi-step. In some situations if an adjustment is
made, additional options become available for further adjustment.
Examples of these multi-step menus are Depth Range, Depth Alarm and
Zoom. See the detailed description of each function for further
explanation.
Menu Functions
Sensitivity. The Sensitivity function controls the
sensitivity of the sonar receiver. The 450TX
automatically adjusts the level of receiver sensitivity
based on a number of factors including the depth of
the water and the level of noise present. Noise can be
caused by other electronic devices, engines, trolling
motors, propeller cavitation and hydrodynamic flow
among others.
The user has the option of adjusting the Sensitivity higher or lower based
on personal preference. You can select one of 11 sensitivity settings from
-5 to +5. A setting of 0 (factory setting) has no effect on the automatic
sensitivity control. Increasing the sensitivity (+1 through +5) enables the
unit to display the information from progressively smaller sonar returns. By
decreasing the sensitivity (-1 through -5), the unit effectively filters small
sonar returns.
In murky or muddy water, it is often helpful to reduce the sensitivity. This
prevents the display from being cluttered with sonar returns from debris or
suspended particles. In very clear or very deep water, it may be helpful to
increase the sensitivity since even the smallest sonar return may be of interest
to the user.
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USING THE 450TX
MENU FUNCTIONS
High Sensitivity Sensitivity at “0”
To adjust Sensitivity, press MENU
repeatedly until the Sensitivity
heading is displayed. When the
Sensitivity menu appears, use
the UP ARROW to increase the
sensitivity, or the DOWN
ARROW to reduce sensitivity. To
sequence through the available
settings, press and hold either
ARROW button. Release the
button at the setting you want
to select.
Low Sensitivity
After an adjustment is made, the menu disappears and the new sensitivity
setting is in affect. If additional time is needed to study a menu, press and hold
the MENU button and the menu will remain on-screen indefinitely. If you need
to make an additional adjustment, press the UP ARROW or DOWN ARROW
button.
Depth Range. The Depth Range function
controls the vertical distance displayed on
the graphic area of the display. There are
nine depth ranges available. The top of the
range is always 0, or the surface of the
water. Ranges of 0–15', 0–30', 0–60',
0–120', 0–180', 0–240', 0–360', 0–480',
and 0–600' are available. In the metric
selection , ranges of 0–5, 0–10, 0–20, 0–40,
0–60, 0–80, 0–110, 0–150, and 0–185
metres are available. The range that
positions the bottom depiction closest to the
bottom of the screen, will best utilize the
available display resolution.
The 450TX automatically adjusts the depth range depending on the depth of
the water. The unit tries to maintain the bottom depiction about ²⁄₃ down the
total range (for example, in 6m (20') of water, the 0-10m (0-30') range would
be selected). This provides the best display resolution and therefore the best
target separation possible.
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USING THE 450TX
MENU FUNCTIONS
The Depth Range can be adjusted manually.
Press MENU repeatedly until the Depth Range
menu is visible. Two options are available: Auto
and Manual.
The manual setting enables you to adjust the
current depth range setting. The unit no longer
adjusts the Depth Range to the most
appropriate range for bottom display. Often, the
bottom may not be visible on-screen. The digital depth readout always
determines the depth of the bottom, even if it is not visible on-screen.
Using manual Depth Range
control, you can view sonar
information from the area near the
surface in great detail.
To return to automatic Depth
Range control, press the MENU
button until the Depth Range
menu appears on-screen and use
the UP ARROW to select AUTO.
Zoom. The 450TX uses a greatly
enhanced Zoom capability called
Depth Range
“TruZoom” which offers expanded information on a select area of sonar
information. Zoom is similar to Depth Range because it controls the range of
information displayed on screen. Zoom, however, allows selection of ranges
beneath the surface so any area of water between the surface and the
bottom can be enlarged to provide more detailed information. By using the
full display to show a small area of coverage, the effective display resolution is
increased, and the unit’s ability to separate close targets is enhanced.
The Zoom ranges available are dependent on
the current depth range. In the 5m (15') depth
range, TruZoom displays a range equal to one
half the current depth range. In the 10m (30'),
20m (60'), 40m (120'), 60m (180'), 80m (240'),
110m (360'), 150m (480') and 185m (600')
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USING THE 450TX
MENU FUNCTIONS
depth ranges, TruZoom displays a range equal to
one fourth the current depth range. The box at the
right side of the screen outlines the area to be
zoomed.
The 450TX shows Zoom range in conjunction with
the full depth range. The Zoom range is shown on
the left side of the screen and full range information
is shown on the right side of the display. The area
which is being enlarged by Zoom is indicated by the square box. Zoom can
either operate automatically, in which the Zoom range is constantly adjusted
to show the bottom, or manually, in which the user controls the location of
the Zoom range.
Upper Zoom Limit
“Automatic” Zoom is especially
helpful when looking for
structure or bottom detail. The
“Automatic” Zoom keeps the
bottom in view even in quickly
changing terrain. “Manual”
Zoom
provides
detailed
information of any area from
the surface to the bottom.
In “Manual” Zoom, the Zoom
range does not move as the
terrain changes. To operate
Zoom, press MENU repeatedly
until the Zoom menu is on-
Lower Zoom Limit
screen. Three options are available: “Off” (Factory
Setting), “Auto” (Automatic bottom tracking Zoom),
and “Manual” (User controlled Zoom range). Press
the DOWN ARROW once to highlight Auto or twice
to highlight Manual. If Manual is selected a submenu
will appear allowing manual zoom range
adjustment. When the menu disappears, full range
information is displayed on the right as always. The
square box indicates the Zoom range. In Auto Zoom,
the box will move vertically to remain in the general
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USING THE 450TX
MENU FUNCTIONS
area of the bottom return. The left side of the
screen is a magnified view of the information seen
inside the Zoom range box. The upper and lower
depth limits of the Zoom range are shown on the
right side of the Zoom view.
It is not possible to use Zoom in conjunction with
the Large Digital View.
To disable Zoom, press the MENU button until the
Zoom menu is on-screen. Use the UP ARROW to
highlight Off, and let the menu time out.
When the unit is powered off, the Zoom menu
returns to Zoom Off.
Depth Alarm. The 450TX contains an audible
alarm to warn you of shallow water depths. The
alarm is adjustable to depths of .6m (2') to 30m
(99'). When the alarm is enabled, an audible alarm
sounds if the water beneath the boat is equal to or
less than the selected alarm depth. The alarm
sounds continuously for about five seconds, and
then intermittently to remind you that you are still
in shallow water. Additionally, the 450TX can
anticipate quickly changing terrain and sound
the Depth Alarm before the bottom depth
actually reaches the preset alarm depth.
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USING THE 450TX
MENU FUNCTIONS
Fish Alarm. The Fish Alarm alerts you to the
presence of fish, or other targets not
connected to the bottom. The Fish Alarm has
three different settings that correspond to the
three different size fish symbols shown on-
screen.
The default setting is “OFF.” With the “Large
fish only” setting, the 450TX alarms on only
those targets that are represented by the large
fish symbols. The 450TX can be set to alarm on
only large and medium fish, or set to alarm on
all fish.
Once the Fish Alarm is enabled, the 450TX
emits an audible beep when the selected size
fish symbol appears on-screen.
Fish Alarm settings are remembered when the unit
is powered off.
Triplog. Triplog provides a running log of
information based on input from the Temp/Speed
sensor.
Since Triplog requires information from the
Temp/Speed sensor to operate, if this sensor
is not detected by the 450TX, the Triplog
menu will not appear as an option.
Triplog provides four pieces of information: the total time elapsed since
power-up or reset, the distance traveled since the 450TX was powered up
or reset, the average speed, and the input voltage from your boat’s
electrical system.
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USING THE 450TX
MENU FUNCTIONS
The time, speed and distance
calculations are useful for tracking
your progress on a trip. The input
voltage is useful for determining
the condition of the charging
system of the boat. When used in
a portable application or whenever
the 450TX is operated from a
battery source, the voltage
number can be used to determine
battery life. The 450TX will operate
at voltages from 10 to 20 VDC.
Voltages in excess of 20 or less
Triplog
than 10 VDC cause the unit to power off. The Triplog resets at power off.
Options. The Options Menu is a series of linked menu
functions used initially to set your preferences. Once
your preferences are selected, it is unlikely these
functions need to be accessed during the normal
operation of the product.
There are thirteen Option menus: Contrast, Display
Speed, Battery Alarm, Bottom Black, Fish ID, Numeral size, Transducer,
Units Speed, Units Depth, Languages, Speed Offset, Depth Offset and
Reset. Press the View button at any time to exit options and return to
normal operation.
Contrast. The Contrast function allows the user to
control the level of contrast of the LCD display. The
450TX will automatically adjust the display contrast to
compensate for changing ambient temperatures;
however, some situations may occur where manual
adjustment will provide a higher level of contrast.
Eleven contrast settings, +5 to -5, are possible. The
display contrast will change as the adjustment is made
so the optimum level of contrast can easily be
adjusted. Use the ARROW buttons to highlight the desired selection.
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USING THE 450TX
MENU FUNCTIONS
Display Speed. Display Speed controls
the rate at which the graphic information
moves across the display. There are 5
possible speeds; the fastest rate (5) is the
factory setting. If your boat is stationary or
moving very slowly for extended periods, it
may be desirable to update the display at
a slower rate. The closer the update rate matches boat speed, the more
accurate is the graphic depiction of the terrain beneath your boat.
Use the UP and DOWN ARROWS to select the desired update rate. (1) is
the slowest, (5) is the fastest. Use the MENU button to advance to the next
menu.
The Display Speed setting is remembered when the unit is powered off.
Battery Alarm. The Battery Alarm Option allows you to select the voltage
level at which the Battery Alarm activates.
At the Battery Alarm menu (under options),
you will note that the default setting is OFF.
Push the DOWN ARROW BUTTON to select
the feature ON. Push the DOWN ARROW
BUTTON again to move into the ADJUST
BATTERY ALARM setting. Using the UP and
DOWN ARROW BUTTONS, select a voltage
between 9.0 and 12.0.
When the voltage drops below your selected voltage, an audible alarm will
sound, and a battery alarm icon will be displayed on screen with current
voltage level.
Bottom Black. There are two selections
available: Off and On. The factory setting is
Off. With this setting, the 450TX displays
the bottom using 4 level grayscale. This
allows you to determine the texture and
relative hardness of the bottom. Selecting
Bottom Black “ON” causes the unit to
blacken in the display below the bottom.
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USING THE 450TX
MENU FUNCTIONS
Bottom Black View
This gives the user easiest
recognition of the bottom
location, even from a great
distance.
The 450TX remembers the
Bottom Black setting when
powered off.
Fish ID. There are three
+
selections available: Off, ID
ON, and Adjust. The factory
+
setting is ID On. With Fish ID
Off, sonar returns are displayed as “raw”
information. There is no interpretation made
by the unit. Selecting ID Off also disables the
fish alarm.
+
ID On enables the 450TX to interpret the
raw sonar data and, using a variety of
techniques, depict appropriate target returns
as one of three different size fish symbols.
Further identification shows which beam the
fish is detected in. The 450TX also displays
the depth beneath the surface with the
corresponding fish symbol.
Selecting Adjust and making incremental
changes enhances the fishfinder’s ability to
identify sonar returns as fish symbols.
Increasing the value to a number greater
than zero shows more fish symbols on-
screen. In this case smaller sonar returns will
be depicted as fish symbols. This is useful for
identifying many smaller sonar returns (such
as baitfish) as fish symbols.
+
ID On Raw Sonar
Decreasing the value to a number less than
zero shows fewer fish symbols on-screen. In
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USING THE 450TX
MENU FUNCTIONS
this case smaller sonar returns are disregarded. This is useful for eliminating
many small sonar returns when seeking larger species of fish.
The 450TX remembers this selection even when the unit is powered off.
Numeral Size. Two options are available: Big
and Small. The factory setting is Big. With this
setting, the digital depth and speed and temp
numerals are drawn large enough to be read
from across the boat. The big numerals occupy
space on the display that could be used for the
graphics area. Hence, the small numerals
option. With small numerals selected, a greater amount of the display area
is available for the graphic view. This effectively increases the display
resolution of the unit.
Numeral Size settings are remembered when powered off.
Transducer. The Transducer Option controls
the 450TXs ability to determine the
transducer connected. If you are using the
standard tri-beam transducer or wide side
transducer, no adjustment to this menu is
needed unless the transducer develops a
fault, which is a rare occurrence. The factory
setting for the Transducer menu is "Auto". The transducer menu selections
will be remembered when the 450TX is turned off.
If a faulty transducer is connected, the 450TX may not change the screen
presentation to match the transducer. In this instance, you may need to
manually select "Tri-beam" for the tri-beam transducer or "Side" for the
WideSide transducer.
Often a transducer switch is used to connect two tri-beams transducers, or
a tri-beam and a wide side to the 450TX. In "Auto" the 450TX identifies
the transducer as the switch is changed. Only if the transducer is faulty do
you need to manually identify the transducer in the menu.
When using a dual beam (DHS-W) and tri-beam transducer together with
a switch, leave the menu set to Tri-beam. When using a dual beam and
Wide Side transducer together with a switch, manually select the correct
transducer in the menu each time the switch is changed.
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USING THE 450TX
MENU FUNCTIONS
Units Speed. Units of Speed allows the selection
of MPH (statute miles per hour), or KTS (nautical
miles per hour). Use the Arrow buttons to
highlight the desired selection.
Units Depth. The Units Depth function allows
the user to select the units of measurement for
the depth readout. FEET and METRES are
available.
The 450TX remembers this selection even when
the unit is powered off.
Languages. There are thirteen languages
available within the Languages option menu:
English, French, Italian, German, Norwegian,
Swedish, Spanish, Finnish, Portuguese,
Polish, Danish, Hungarian and Dutch. To select
your language, push the UP or DOWN ARROW
BUTTONS to scroll through the list.
The 450TX remembers this selection even when
the unit is powered off.
Speed Offset. The Speed Offset option allows
the user to compensate for differences in hull
design, and its effect on the accuracy of the
speed measurement. If there is a discrepancy
between the indicated speed and another speed
measurement device on the boat, the speed
measurement can be varied to improve accuracy.
Remember, the speed paddle wheel measures
speed through the water, not speed over ground.
Speed offset is remembered after power is
disconnected.
Depth Offset. The Depth Offset allows the user
to select the point on the boat from which the
depth measurement is made. Selecting a positive
value adds distance to the measurement. If the
transducer is mounted 3 feet beneath the
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ADVANCED FEATURES
USING DIAGNOSTIC
waterline, a positive 3 will show the correct depth from the surface of the water.
Another frequent use of depth offset is to show the depth beneath the deepest
point of the hull. A negative value equal to the distance from the transducer
location and the deepest point of the hull will have the same effect as
mounting the transducer at the deepest point.
Depth offset is remembered after power is disconnected.
Reset. With the many User Options available to customize
the 450TX, it is easy to configure the unit in such a way that
it is detrimental to a particular use. By using the Reset
function, all variable or user-controlled features of the
450TX are returned to the factory settings.
The Reset function is an important first step in troubleshooting problems to
ensure that a user selected setting is not the cause for the perceived problem.
USING THE DIAGNOSTIC
FEATURE
The 450TX contains a powerful
diagnostic tool that can aid in
determining the cause of a problem.
To use the Diagnostic feature,
select the Diagnostic feature on
the start-up menu on the initial
screen.
Self Test. Initially, the 450TX will perform a self-test. This test confirms the
operation of all internal circuitry. At the conclusion of the test, one of two
messages will appear. “Passed” indicates the internal test discovered no
failures, “Failed” indicates a significant internal problem was discovered and
the unit requires factory service. A code number appears that tells repair
personnel where the problem is.
Transducer. The first connection tested is Transducer input. If a transducer is
detected, “Tri-Beam” or “Wide Side” appears. If a series of dashed lines is shown,
no transducer is connected or there is a problem with the transducer or cable.
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ADVANCED FEATURES
USING DIAGNOSTIC
If you are using multiple transducers, switch between transducers to
confirm the connections for each.
Boat Speed/Water Temperature Connection. Other connections tested
include the boat speed and surface water temperature sensors. These
accessory sensors can be purchased independently or together as a single
sensor (see the Humminbird Accessories catalog). If the sensors are
connected and working properly, a “connected” message appears.
The speed input feature only works when the boat is in motion as the
paddle wheel on the speed sensor must rotate to be detected.
Voltage Input. Another connection tested is the voltage input, and is
especially helpful in diagnosing input voltage problems. The current input
voltage is displayed. If voltage fluctuations or power supply in excess of 20
VDC or less than 10 VDC is suspected, use the diagnostic screen to confirm
input voltage. Often, small outboard motors do not effectively regulate
voltage when operated at high engine speeds.
Use Diagnostic while running the boat at high speeds to show the voltage
gain. Also, if you are using the 450TX in a portable configuration or from
the trolling motor battery, Diagnostic can be used to evaluate the health of
the battery by showing the current voltage.
Total Time. The total time category indicates the total time the unit has
been in use since shipped from the factory. It is normal for some hours to
appear in the total time when the unit is new due to factory testing. While
Upper Range Limit
Amplitude Readout
Sonar Return
Lower Range Limit
Depth
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ADVANCED FEATURES
USING DIAGNOSTIC
this is often of interest to the user, it is primarily a diagnostic tool for the
repair technician should the unit need service.
Sonar Beams. The second Diagnostic screen provides valuable information
about the sonar function of the 450TX. The three columns of information
show the raw sonar signal as it is seen by the unit.
This information is useful in both troubleshooting a potential fault, as well
as aiding in the transducer installation (for through the hull installations
only).
The sonar diagrams indicate the returned signal of each sonar pulse
transmission. By analyzing these diagrams, the user can gain additional
insight into the performance of the unit.
The diagrams show time delay (distance) on the vertical axis, and amplitude
or strength of return on the horizontal axis. An “amplitude” number shows
the relative strength of each return signal. The depth number shows the
depth of water beneath the boat as measured by each of the three beams.
With the boat stationary over a flat, consistent bottom, the sonar returns
from the left and right beams should be identical. Any discrepancy
between these signals may indicate a problem with the location of the
transducer. (Often voids or irregularities in the laminated hull of a fiberglass
boat will block or degrade one or more of the sonar signals.)
By referring to this screen prior to permanently mounting a through-the-
hull transducer, the location can be adjusted until no visible loss is
observed.
The diagram of the center beam cannot be compared to the left and right
beams as this beam is a different frequency and beam width. The diagram
is useful in ensuring that the center beam is present and of sufficient
strength.
The depth of the water beneath the boat is shown for each of the three
beams. In operation, only the center beam is used to display this depth,
however, the depth number is another means of comparison.
When in diagnostic, two menus are available to the user: Depth Range, and
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ADVANCED FEATURES
USING ALTERNATIVE TRANSDUCERS
Diagnostic. The Depth Range menu
can be used normally to control the
range of information displayed in
the Diagnostic diagrams. The
Diagnostic menu is used to exit the
Diagnostic function and return to
the Start-Up screen.
USING ALTERNATIVE
TRANSDUCERS
Wide side operation
The Wide Side Transducer is a specialized "side-looking" transducer that is
extremely useful for bank fishing or looking for bait fish in open water. The
Wide Side transducer uses three
different sonar elements that
transmit signals to the left, right and
straight down from your boat. The
downward beam is 200 kHz with a
24 degree area of coverage. This
beam maintains a continuous digital
depth readout from the bottom
directly beneath your boat. The side
beams are 455 kHz with a 16 degree
area of coverage. The side-looking
elements can be used independently,
or together to locate targets near the surface of the water on either side of
your boat.
The Wide Side transducer can be connectedly directly to the 450TX or used
in conjunction with the standard transducer through a transducer switch.
When used with a switch in conjunction with the Tri-Beam transducer, the
450TX recognizes which transducer is connected whenever the switch
position is changed.
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ADVANCED FEATURES
USING ALTERNATIVE TRANSDUCERS
When a Wide Side transducer is connected, the screen display changes to
display the information from the side-looking elements. The Wide-Side
transducer has four views available: Left, Right, Down and Both. These
views are controlled by the View button. The default view is both, in which
information from both the left and right elements are displayed on screen.
The digital depth of the water beneath your boat is always present.
Viewing both left and right sides simultaneously gives you an excellent tool
when searching for bait fish in open water, or when following a creek bed.
However, you will have a greater display resolution if you view only one
side.
The down view is similar to the traditional view when using the standard
transducer, however there is no Tri-Beam information available, such as fish
location.
When operating in Wide Side mode, the range must be adjusted manually,
since the bottom is often not visible on-screen. Ranges of 5m (15'), 10m
(30'), 20m (60') and 40m (120') are available. Also, Zoom is not possible in
Wide Side mode, and the Zoom menu is not available.
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MAINTENANCE
MAINTENANCE AND TROUBLESHOOTING
MAINTENANCE
Your 450TX is designed to provide years of trouble free operation with
virtually no maintenance. Follow these simple procedures to ensure your
450TX continues to deliver top performance.
• If the unit comes into contact with salt spray, simply wipe the
affected surfaces with a cloth dampened in fresh water. Do not use
a chemical glass cleaner on the lens. Chemicals in the solution may
cause cracking in the lens of the unit.
• When cleaning the LCD protective lens, use a chamois and non-
abrasive, mild cleaner. Do not wipe while dirt or grease is on the
lens. Be careful to avoid scratching the lens.
• If your boat remains in the water for long periods of time, algae and
other marine growth can reduce the effectiveness of the transducer.
Periodically clean the face of the transducer with liquid detergent.
Pivoting the transducer up in the bracket may allow better access for
inspection or cleaning.
• If your boat remains out of the water for a long period of time, it may
take some time to wet the transducer when returned to the water. Small
air bubbles can cling to the surface of the transducer and interfere with
proper operation. These bubbles dissipate with time, or you can wipe the
face of the transducer with your fingers after the transducer is in the
water.
• Never leave the 450TX in a closed car or trunk—the extremely high
temperatures generated in hot weather can damage the electronics.
TROUBLESHOOTING
Do not attempt to repair the 450TX yourself. There are no user serviceable
parts inside, and special tools and techniques are required for reassembly
to ensure the waterproof integrity of the housing. Repairs should be
performed only by authorized Humminbird technicians.
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MAINTENANCE
TROUBLESHOOTING
Many requests for repair received by Humminbird involve units that do not
actually need repair. These units are returned “no problem found.” If you
have a problem with your 450TX, use the following troubleshooting guide
before sending your unit in for repair. The 450TX contains several tools that
can aid in determining if there is a problem and how to isolate and repair
the problem in many cases.
1. Nothing happens when I turn the unit on.
Check the power cable connection at both ends. Be sure the cable is
connected correctly to a reliable power source—red lead to positive, black
lead to negative or ground. Ensure the power available at the mount is
between 10 and 20 VDC. If the unit is wired through a fuse panel, ensure
the panel is powered. Often accessory fuse panels are controlled by a
separate switch or the ignition switch. Also, often a fuse can appear to be
good when in fact is not. Check the fuse with a tester or replace it with a
fuse known to be good.
Check the power connection to the 450TX. It is possible to force the power
cable connector into the cable holder incorrectly. If the connector is
reversed, the unit will not work. Examine the contacts on the back of the
unit to ensure there is no corrosion. Finally, ensure the unit is firmly seated
on the mount. The electrical contacts are not made until the unit is fully
seated.
Ensure the metal cable retainer is properly installed in the mount. If not, the
power connection may push out when the unit is put on the mount.
2. There is no transducer detected.
The 450TX has the ability to detect and identify that a transducer is
connected. First, ensure that an appropriate transducer connector is
positioned correctly in the connector holder, and that the unit is fully seated
on the mount. The 450TX will work with the standard tri-beam transducer.
Second, inspect the transducer cable from end to end for breaks, kinks, or
cuts in the outer casing of the cable. Also ensure the transducer is fully
submerged in water. If the transducer is connected to the unit through a
switch, temporarily connect it directly to the unit and try again. If none of
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MAINTENANCE
TROUBLESHOOTING
these items identifies an obvious problem, the transducer itself is probably
the problem. Be sure to include the transducer if returning the unit for repair.
3. There is no bottom reading visible on the display.
There are a number of possible causes for this condition. If the loss of
bottom information occurs only at high boat speeds, the transducer needs
adjusting. If the digital depth readout is working but there is no bottom
visible on-screen, it is possible the depth range has been adjusted manually
to a range lower than what is needed to display the bottom. Also, in very
deep water, it may be necessary to manually increase the sensitivity setting
to maintain a graphic depiction of the bottom.
If you are using a transducer switch to connect two transducers to the
450TX, ensure the switch is in the correct position to connect a transducer
that is in water. (If a trolling motor transducer is selected and the trolling
motor is out of water, no sonar information appears.)
If none of the above solve the problem, inspect the transducer cable from
end to end for breaks, kinks, or cuts in the outer casing of the cable. If the
transducer is connected to the unit through a switch, temporarily connect
it directly to the unit and try again. If none of these items identifies an
obvious problem, the transducer itself may be the problem. Be sure to in-
clude the transducer if returning the unit for repair.
4. When in very shallow water, I get gaps in the bottom reading
and inconsistent digital depth indication.
The 450TX will work reliably in water 2' (.6m) or deeper. The depth is
measured from the transducer, not necessarily from the surface.
5. The unit comes on before I press POWER, and won’t turn off.
Check the transducer cable—if the outer jacket of the cable has been cut
and the cable is in contact with bare metal, you need to repair the cut with
electrical tape. If there is no problem with the cable, disconnect the
transducer from the unit and see if the problem is corrected, to confirm the
source of the problem.
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MAINTENANCE
TROUBLESHOOTING
6. I get gaps in the reading at high speeds.
Your transducer needs adjusting. If the transducer is transom-mounted,
there are two adjustments available to you—height, and running angle.
Make small adjustments and run the boat at high speeds to determine the
effect. It may take several tries to optimize high speed operation. This can
also be a result of air or turbulence in the transducer location caused by
rivets, ribs, etc.
7. My unit loses power at high speeds.
Your 450TX has over-voltage protection that turns the unit off when input
voltage exceeds 20 VDC. Some outboard motors do not effectively regulate
the power output of the engine’s alternator and can produce voltage in
excess of 20 volts when running at high RPMs. The 450TX displays input
voltage in the Diagnostic screen. Use this readout to determine if the
voltage exceeds 20 VDC.
8. The screen begins to fade out. Images are not as sharp as
normal.
Check the input voltage using Diagnostic. The 450TX will not operate on
input voltages below 10 VDC.
9. The display shows many black dots at high speeds and high
sensitivity settings.
You are seeing noise or interference caused by one of several sources.
Noise can be caused by other electronic devices. Turn off any nearby
electronics and see if the problem goes away. Noise can also be caused by
the engine. If engine noise is causing the interference, the problem will
intensify at higher RPMs. Increase the engine speed with the boat
stationary to isolate this cause. Propeller cavitation can appear as noise on-
screen. If the transducer is mounted too close to the propeller, the
turbulence generated can interfere with the sonar signal. Ensure that the
transducer is mounted at least 15" (38cm) from the prop.
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SPECIFICATIONS
Operating Frequency . . . . . . . . . . . . . . . .200 kHz and 455 kHz
Power Output . . . . . . . . . . . . . . . . . . . . . .300 Watts (RMS)
. . . . . . . . . . . . . . .2400 Watts (Peak to Peak)
Area of Coverage . . . . . . . . . . . . . . . 90° continuous coverage
. . . . . . . . . . . . . . . . . .Center: 20° at -10 db
. . . . . . . . . . . . .2 Side Beams: 45° at -10 db
Power Requirement . . . . . . . . . . . . . . . . . . . . . . . .10 - 20 VDC
Display
. . . . . . . . . . . . . . . . . . . . . . . . . . .FSTN LCD
. . . . . . . . . . . . . . . . . . . . . . .160 H x 160 V
LCD Matrix
Viewing Area
. . . . . . . . . . . . . . . . . . .10cm H x 7.6cm V V
. . . . . . . . . . . . . . . . . . . . . . . . . .(4" H x 3")
Mounting
Unit Size
. . . . . . . . . . . . . . . .Quick Disconnect Mount
. . . . . . . . . . .19.4cm H x 20cm W x 11cm D
. . . . . . . . . . . . . . . .(7⁵⁄₈"H x 7⁷⁄₈"W x 4³⁄₈"D)
Transducer (Standard)XT-6-TB-90
Transducer Cable Length . . . . . . . . . . . . . . . . . . .6 metres (20')
Depth Ranges . . . .5, 10, 20, 40, 60, 80, 110, 150 & 185 metres
(15', 30', 60', 120', 180', 240', 360', 480', & 600')
Zoom Ranges
. . . . . . . . .2, 5, 10, 15, 20, 28, 38 & 46 metres
. . . . . . .(7¹⁄₂', 15', 30',45', 60', 90', 120', 150')
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Remove and use for
Transducer
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P/N 530977-1
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