Garmin 12CX User Manual
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© Copyright 1999
GARMIN Corporation
All Rights Reserved
Except as expressly provided herein, no part of this manual
may be reproduced, copied, transmitted, disseminated, downloaded or stored in any storage medium, for any purpose without the express prior written consent of GARMIN Corporation. GARMIN Corporation hereby grants permission to
download a single copy of this manual and of any revision to
this manual onto a hard drive or other electronic storage medium to be viewed and to print one copy of this manual or of
any revision hereto, provided that such electronic or printed
copy of this manual or revision must contain the complete
text of this copyright notice and provided further that any
unauthorized commercial distribution of this manual or any
revision hereto is strictly prohibited.
Garmin International, Inc.
1200 E. 151st Street, Olathe, KS 66062 USA
Tel: 913-397-8200
FAX: 913-397-8282
Garmin (Europe) Ltd., Unit 5, The Quadrangle, Abbey Park
Industrial Estate, Romsey SO51 9AQ UK
Tel: 011-44-1794-519944
FAX: 011-44-1794-519222
Garmin (Asia) Corp.
3F, No. 1, Lane 45, Pao Hsing Road, Hsin Tien, Taipei, Taiwan R.O.C.
Tel: 011-886-02-2917-4107
FAX: 011-886-02-2917-1758
Web Site Address: www.garmin.com
January 1999 - Part Number 190-00160-00 Rev. B. Printed in Taiwan
INTRODUCTION
GPS 12CX
Packing List
OWNER’S
MANUAL
Thank you for choosing the GARMIN GPS 12CX—the smallest,
easiest-to-use GPS navigator for outdoor use! The GPS 12CX represents GARMIN’s continuing commitment to provide quality navigation information in a versatile and user-friendly flexible design you’ll
enjoy for years. To get the most from your new GPS, take the time to
read through the owner’s manual in order to understand the operating features of the GPS 12CX. This manual is organized into four
sections for your convenience:
Introduction— gives a quick overview of the manual and contains
the table of contents and the glossary of navigational terms.
Quick Start— introduces you to the basic features of the unit and
provides a quick-start orientation to the GPS 12CX.
Reference— provides details about the advanced features and operations of the GPS 12CX by topic.
The Appendices— contains initialization instructions and items with
multiple listings, such as map datums, time offsets, and the index.
Before getting started with your GPS, check to see that your
GARMIN GPS 12CX package includes the following items. If you are
missing any parts, please contact your dealer immediately.
Standard Package:
• GPS 12CX Unit • Owner’s Manual
• Wrist Strap • Quick Reference Guide
i
INTRODUCTION
Caution
The GPS system is operated by the government of the United States,
which is solely responsible for its accuracy and maintenance. The system is
subject to changes which could affect the accuracy and performance of all
GPS equipment. Although the GPS 12CX is a precision electronic
NAVigation AID (NAVAID), any NAVAID can be misused or misinterpreted
and, therefore, become unsafe.
Use the GPS 12CX at your own risk. To reduce the risk of unsafe
operation, carefully review and understand all aspects of this Operator’s
Manual and thoroughly practice operation using the simulator mode prior
to actual use. When in actual use, carefully compare indications from the
GPS 12CX to all available navigation sources including the information
from other NAVAIDs, visual sightings, maps, etc. For safety, always resolve
any discrepancies before continuing navigation.
NOTE: This device meets requirements for Part 15 of the FCC limits for
Class B digital devices for home or office use. It has been tested for compliance with all necessary FCC standards. This equipment generates, uses,
and can radiate radio frequency energy and, if not installed and used in
accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not
occur in a particular installation. If this equipment does cause harmful
interference to other equipment, which can be determined by turning the
equipment off and on, the user is encouraged to try and correct the interference by relocating the equipment or connecting the equipment to a different circuit than the affected equipment. Consult an authorized dealer or
other qualified service technician for additional help if these remedies do
not correct the problem. Operation is subject to the following conditions:
(1) This device cannot cause harmful interference, and (2) this device must
accept any interference received, including interference that may cause undesired operation. The GPS 12CX does not contain any user-serviceable
parts. Repairs should only be made by an authorized service center. Unauthorized repairs or modifications could void your warranty and your authority to operate this device under Part 15 regulations.
ii
INTRODUCTION
Table
of
Contents
SECTION ONE Introduction
Glossary .......................................................................................... iv-v
Accessories ........................................................................................ vi
SECTION TWO Quick Start
Battery Installation ............................................................................. 1
Keypad Usage and Data Entry ........................................................... 2
Primary Page Overview ................................................................. 3-4
Power On, Screen Contrast & Marking a Position .........................5
Position Page, Map Basics & Going to a Waypoint .........................6
Compass Page .................................................................................... 7
Cancelling a GOTO, Clearing Map & Power Off ............................. 8
SECTION THREE Reference
Satellite Status Page ............................................................................ 9
Receiver Status .................................................................................10
Battery Level Indicator ..................................................................... 11
Backlighting, and Emergency Erase ................................................ 1 1
Position Page & User Selectable Fields .................................... 12-13
Map Page, Panning and Waypoint Display .............................14-15
Map Page Setup .......................................................................... 16-18
Navigation Pages ........................................................................ 19-22
Creating, Managing and Using Waypoints ............................... 23-29
TracBack Navigation.................................................................. 30-31
Creating and Navigating Routes ................................................32-36
Menu Page—Distance and Sun Calculations .................................37
Menu Page—System Setup ..............................................................38
Menu Page—Navigation Setup.................................................. 39-40
Menu Page—Alarms Setup .............................................................. 41
Menu Page—Interface Setup ..................................................... 42-43
Menu Page—Language Setup & Find City ..................................... 4 4
Navigation Simulator ....................................................................... 45
SECTION FOUR Appendices
Appendix A—Initialization .......................................................46-47
Appendix B—Specfications and Wiring ................................... 48-49
Appendix C—Messages ............................................................. 50-51
Appendix D—Time Offset ............................................................... 52
Appendix E—Map Datums .......................................................53-54
Appendix F—Index ................................................................... 54-56
iii
INTRODUCTION
Glossary
The GPS 12CX is a powerful navigation tool that can guide you anywhere in the world. To better understand its operation and capabilities, it
may be helpful to review the basic terms and concepts briefly explained
below.
Other navigation and GPS definitions used in the manual are defined in
the appropriate reference sections of the manual.
Almanac Data
Satellite constellation information (including location and health of satellites) that is transmitted to your receiver from every GPS satellite. Almanac data must be acquired before GPS navigation can begin.
Bearing
The compass direction from your position to a destination.
Course Made Good (CMG)
The bearing from the “active from” position (your starting point) to
your present position.
Crosstrack Error (XTK)
The distance you are off a desire course in either direction.
Desired Track
The compass course between the “from” and “to” waypoints.
Differential GPS (DGPS)
An extension of the GPS system that uses land-based radio beacons to
transmit position corrections to GPS receivers.
Estimated Time of Arrival (ETA)
The time of day of your arrival at a destination.
Estimated Time Enroute (ETE)
The time left to your destination at your present speed.
iv
INTRODUCTION
Glossary
Grid
Coordinate system that projects the earth on a flat surface, using square
zones for position measurements. UTM/UPS and Maidenhead formats are
grid systems.
Ground Speed
The velocity you are traveling relative to a ground position.
Latitude
The north/south measurement of position perpendicular to the earth’s
polar axis.
Navigation
The process of traveling from one place to another and knowing where
you are in relation to your desired course.
Position
An exact, unique location based on a geographic coordinate system.
Track (TRK)
The direction of movement relative to a ground position.
Universal Transverse Mercator (UTM)
A grid coordinate system that projects global sections onto a flat surface
to measure position in specific zones.
Velocity Made Good (VMG)
The speed you are traveling in the direction of the destination.
Waypoint
A specific location saved in the receiver’s memory.
v
INTRODUCTION
Accessories
Accessories are available from your dealer or directly from GARMIN. To order an accessory directly
from GARMIN, call (913) 397-8200 between 8:00 am
and 5:00 pm Central Time.
Swivel Mount Bracket
Part Number—010-10048-00
Mount will swivel 360° at base, unit can be tilted
approximately 30° forward or backward.
Carrying Case
Part Number—010-10117-00
Zippered case is lined and has a belt loop .
GA 27 Amplified Antenna
Part Number—010-10052-00
Helps the GPS 12CX acquire weak satellite signals.
Great for the car!
Cigarette Lighter Adapter
Part Number—010-10085-00
Plugs into 12 and 24 volt systems to run the GPS
12CX on external battery power.
PC Software and Cable Kit
Part Number—010-10054-00
This DOS based software allows you to easily manage
and create waypoint and routes.
Not Shown:
Bicycle Mount – 010-10115-00
Power Data Cable – 010-10082-00
Data Transfer Cable (unit to unit) – 010-10142-00
PC Interface Cable (serial connector only) – 010-10165-00
PC Interface Cable (wo/lighter adapter) – 010-10141-00
GA 28 Marine Antenna – 010-10052-00
vi
Battery Installation
The GPS 12CX operates on 4 AA batteries (included), which are installed at the base of the unit. These
batteries provide up to 36 hours of use in “Power Saver”
mode.
To install the batteries:
1. Remove the battery cover by turning the
thumb loop at the bottom of the unit 1/4 turn
counter- clockwise.
2. Inser t the batteries into position. The
battery pole that you can still see should
match the symbol (+ or -) marked on the case.
3. Replace and secure the battery cover by
turning the thumb loop 1/4 turn clockwise.
Battery life varies due to a variety of factors, including temperature and backlighting. You may find that
lithium batteries provide longer life in colder conditions.
QUICK START
Battery
Installation
To install the carrying lanyard,
place the loop at the end of the lanyard through the thumb loop on
the battery cover, route the lanyard
back through the loop and pull
tight.
1
QUICK START
Keypad Usage &
Data Entry
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ROCKERROCKER
down to select letters or numbers in a data field. Pressing
ROCKERROCKER
the
ROCKER key left or
ROCKERROCKER
right, moves the cursor forward or backward along the
data path.
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Primary Pages
The GPS 12CX has five primary information pages,
the Satellite, Position, Map, Navigation and Menu pages.
Pressing the
through the information pages, pressing the
PAGE
key will move the display forward
QUIT
key
will move the display backward through the pages.
Below is a brief overview of each page. A detailed description of each information page is available in the
reference section of this manual.
Satellite Page
The Satellite Page shows satellite positions and signal strength. Satellite positions are displayed using two
circles and a center point. The outer circle shows satellites on level with the horizon; the inner circle is 45°
above the horizon; and the center point represents satellites directly overhead. Knowing satellite positions
will show you the direction of any blocked signals.
The bottom of the page contains a row of signal
strength bars corresponding to each satellite being used.
Position Page
The Position Page shows you where you are, what
direction you are heading and how fast you are going.
The top of the page shows a compass tape. The
compass tape provides a graphic representation of your
track. Your track and speed are displayed directly below the compass tape.
QUICK START
Primary Pages
Satellite PageSatellite Page
Satellite Page
Satellite PageSatellite Page
Only solid bars on the Satellite
page represent satellites being
used for navigation
The graphic compass tape reflects your
track only while you are moving.
The next fields on the page are the Trip and Alt fields.
Further information on these fields can be found on page (12).
The rest of the page shows your current location in
three dimensions; latitude, longitude, and altitude. A
12/24 hour clock is provided at the bottom of the page.
Position PagePosition Page
Position Page
Position PagePosition Page
3
QUICK START
Primary Pages
Map PageMap Page
Map Page
Map PageMap Page
The Map Page shows your
progress on a moving map plotter and gives a bird’s-eye-view of
surrounding waypoints.
CC
omom
pass Pagepass Page
C
om
pass Page
CC
omom
pass Pagepass Page
The Compass Page is the default
navigation page and will show
you the direction of the waypoint relative to the direction
that you are traveling.
Map Page
Map PageMap Page
The
Map Page allows you to view your position, the
Map PageMap Page
“path” you have traveled over, and nearby waypoints.
A diamond icon in the center of the screen represents your current position. As you move, you will see
a thin line - called a
you have just covered. Names of stored waypoints can
track log -
appear along the path
also be shown on the map.
The bottom corners of the map will always display
your current track and speed. When going to a waypoint, highlighting an on-screen waypoint, or using the
panning target crosshair, the corresponding distance and
bearing are shown at the top corners of the map. Press
ENTER
to access the setups for this page.
Navigation Page
A navigation page gives you steering guidance when
going to a waypoint. The GPS 12CX has two navigation
page choices: the Compass Page and the Highway Page.
The Compass Page is the default and will be briefly explained here. The Highway Page is covered on page 22.
Compass PageCompass Page
The
Compass Page shows the destination waypoint
Compass PageCompass Page
at the top of the page with the bearing (BRG) and distance (DST) to the waypoint shown below. The center
of the page contains a compass ring and arrow to show
you the direction of the waypoint from the direction
you are moving. The bottom of the page gives your track
(TRK), speed (SPD), and a selectable field for estimated
time to arrival (ETA), estimated time enroute (ETE),
course to steer (CTS), crosstrack error, (XTK), velocity
made good (VMG), or turn bearing (TRN).
Menu Page
The last primary page is the
Menu Page gives you access to the GPS 12CX’s waypoint management, route, track log, and setup features
through a list of submenus.
Menu Page Menu Page
Menu Page. The Main
Menu Page Menu Page
Menu PageMenu Page
Menu Page
Menu PageMenu Page
The Menu Page allows quick access to the unit setups, and the
waypoint management system.
4
Quick Start Tour
The Quick Start Tour will teach you the basic operation of your GPS 12CX. This tour assumes that none
of the factory settings (units of measure, selectable fields)
have been changed. If the settings have been changed
the pictures and descriptions you see in the manual may
not match what you see on the screen.
Turning on the GPS 12CX
1. Press the
The welcome page and database info pages will appear while the unit conducts a self test. Once testing is
complete, the Satellite Page will appear. When sufficient satellite signals have been acquired, the Satellite
Page will be replaced by the Position Page.
POWER
key, hold until the unit turns on.
Adjusting the Contrast
It may be necessary to adjust the display contrast in
varying light conditions. The contrast adjustment can
be accessed from any of the five main pages by pressing
the
POWER
page appears, pressing the
key briefly. After the contrast adjustment
ROCKER
left or right will
either decrease or increase the display’s contrast.
Marking a Position
GPS is really about marking and going to places
called waypoints. Before we can use our GPS 12CX to
guide us somewhere, we have to mark a position as a
waypoint. (Your GPS 12CX can hold up to 1000 waypoints.)
To mark your present position:
1. Press the
appear, with a default three-digit name for the new
waypoint in the upper-left portion of the page.
To rename the waypoint:
1. Highlight the name field, and press
2. Enter the waypoint name ‘HOME’, and press
ENTER
symbol field will become highlighted.
To change the waypoint symbol:
1. Highlight the waypoint symbol field, press
2. Select the house symbol, and press
3. Select the desired color and press
4. Move the cursor to ‘DONE?’, press
MARK
key. The mark position page will
ENTER
.
. (See pg. 2 for data entry.) The waypoint
ENTER
ENTER
.
ENTER
.
ENTER
.
.
QUICK START
Power On &
Marking a
Position
Press the
POWER
Pressing the
key briefly to
ROCKER
activate the contrast adjustment
window.
left or right will decrease or increase the screen contrast.
To Mark Your Present PositionTo Mark Your Present Position
To Mark Your Present Position
To Mark Your Present PositionTo Mark Your Present Position
Renaming a WaypointRenaming a Waypoint
Renaming a Waypoint
Renaming a WaypointRenaming a Waypoint
Changing Waypoint SymbolChanging Waypoint Symbol
Changing Waypoint Symbol
Changing Waypoint SymbolChanging Waypoint Symbol
5
QUICK START
Position/Map
Pages & Going
To a Waypoint
Selecting Map Zoom LevelSelecting Map Zoom Level
Selecting Map Zoom Level
Selecting Map Zoom LevelSelecting Map Zoom Level
Map PageMap Page
Map Page
Map PageMap Page
(making a left turn)(making a left turn)
(making a left turn)
(making a left turn)(making a left turn)
Going to a WaypointGoing to a Waypoint
Going to a Waypoint
Going to a WaypointGoing to a Waypoint
6
Using the Position Page
Walk briskly for 3 - 4 minutes and watch the position
page. This is a good opportunity to compare the Compass Tape at the top of the page and the Track (the direction that you are moving), as long as you are walking
briskly they should be a direct reflection of one another.
The speed that you are traveling, distance you have traveled, and the altitude are also displayed on the upper portion of the screen. The lower portion contains your latitude and longitude, notice that the current position is continually updating as long as you are moving. The current
time is displayed at the bottom of the page.
Let’s continue by looking at the Map Page:Let’s continue by looking at the Map Page:
Let’s continue by looking at the Map Page:
Let’s continue by looking at the Map Page:Let’s continue by looking at the Map Page:
1. Press
PAGE
to display the Map Page.
Map Page
To ensure that we can see our entire trip on the map,
lets change the map scale from the default .2 MI to .8 MI.
1. Press and release the
OUT
button three times.
This quickly adjusts the map scale to the desired
.5 MI setting. To display the current map scale setting
longer, hold the
IN
or
OUT
button.
The Map Page shows your present position as a diamond icon in the center of the map. The house symbol
labeled ‘HOME’ is the waypoint that you created when
you ‘MARKED’ your position, the line connecting the
two is called the ‘TRACK LOG’.
1. Now turn approximately 90° to your left and continue
walking for another 2 - 3 minutes. Notice how the dis
play changes always keeping the direction that you are
traveling toward the top of the map and your track log
updates continually leaving a breadcrumb trail of
where you have been.
Going to a Waypoint
Once you’ve stored a waypoint in memory, you may
return to it by performing a GOTO. A GOTO is a straightline course from your present position to the destination
you’ve selected. Let’s navigate back to our starting position, the HOME waypoint.
To select a GOTO destination:
1. Press
GOTO
.
2. Highlight the HOME on the ‘G-H-I’ tab and press
ENTER
. You’ll notice that you’ll automatically
return to the Map Page, and a straight line will
connect your current position to the HOME waypoint.
Let’s continue by moving to the Compass Page:
1. Press
PAGE
to display the Compass Page
Compass Page
Bearing to
Waypoint
Pointer to
Waypoint
Compass
Ring
Track Over
Ground
Whenever you select a destination waypoint, the
GPS 12CX provides graphic steering guidance with the
Compass Page (the default navigation page). The “compass ring” in the middle of the page acts much the same
as the “compass tape” at the top of the Position Page, it
provides a graphic representation of your present track
(TRK). The “pointer” is a graphic representation of the
direction or bearing (BRG) to the destination waypoint,
and points in the direction you need to travel.
The pointer does not function as a
magnetic compass. Navigation is active
only while the GPS 12CX is moving.
For instance, if the “pointer” is pointing toward the
top of the display then you are heading toward the destination waypoint. If the “pointer” is pointing in any
other direction, turn in the direction of the “pointer”
until it is pointing to the top, then continue in that direction.
The bearing (BRG) and distance (DST) to the destination waypoint are displayed at the top of the screen,
the track (TRK) and speed (SPD) are shown below. The
default ‘ETE’ field at the bottom of the screen, is a
user selectable field that can provide a variety of navigation information.
As you get closer to ‘HOME’, you will be alerted to
PAGE
press
. The GPS 12CX will give you the message
“Approaching HOME”. Once you have arrived the distance field will read 0.00.
Destination
Waypoint
Distance to
Waypoint
Speed Over
Ground
QUICK START
Compass Page
&
Cancelling a
GOTO
The Compass Ring is a graphic
representation of the track (TRK).
The Pointer is a graphic representation of the bearing (BRG).
Getting the MessageGetting the Message
Getting the Message
Getting the MessageGetting the Message
7
QUICK START
Cancelling a
GOTO
Cancelling a GOTOCancelling a GOTO
Cancelling a GOTO
Cancelling a GOTOCancelling a GOTO
Clearing a Cluttered MapClearing a Cluttered Map
Clearing a Cluttered Map
Clearing a Cluttered MapClearing a Cluttered Map
Cancelling a GOTO
If you decide to stop navigating to the active waypoint, all
you have to do is cancel the GOTO.
To cancel an active GOTO:
1. Press the
2. Use the
OPT tab.
3. Highlight ‘CANCEL GOTO’ and press
GOTO
ROCKER
key.
to move the highlight to the
ENTER
.
Clearing a Cluttered Map Display
After you have used the GPS 12CX a few times, you
may find that the display has become cluttered with old
track log information. The track log is the bread crumb
trail that you left on the screen. It is generally a good
idea to start a trip with a clean track log, so for practice,
lets clear the track log we created during this tour.
1. Press
PAGE
or
QUIT
until the Map Page is displayed.
2. Press
ENTER
to display the Map Setup Page.
3. Highlight ‘TRACK SETUP’ and press
4. Highlight ‘CLEAR LOG?’ and press
5. Highlight ‘YES’ on the Warning Page and press
ENTER
ENTER
.
.
ENTER
Screen Backlighting
The GPS 12CX has thee levels of screen backlighting
available for use, OFF, LOW, and HI. After being activated, the backlighting will remain on for the amount of
time specified on the System Setup Page (See page 38).
To activate the screen backlighting:
1. Briefly press the
first level (low, one bulb), or three times to activate
the second level (hi, two bulbs).
Either one or two bulb icons will be displayed along
the bottom of the Contrast Adjustment Page, indicating
the level of screen backlighting that you have activated.
POWER
key twice to activate the
.
To activate screen backlightingTo activate screen backlighting
To activate screen backlighting
To activate screen backlightingTo activate screen backlighting
Turning off the GPS 12CXTurning off the GPS 12CX
Turning off the GPS 12CX
Turning off the GPS 12CXTurning off the GPS 12CX
8
Turning off the Receiver
You have now gone through the basic operation of
your new unit and probably know a little more than
you think about how it works. We encourage you to
experiment with the GPS 12CX until it becomes an extension of your own navigation skills. If you encounter
any problems using the unit or want to take advantage
of the more advanced features, turn to the reference section starting on page 9.
To turn the GPS 12CX off:
1. Press and hold the
POWER
key for 3 seconds.
Status
Field
Horizontal
Accuracy
REFERENCE
Battery
Indicator
Skyview
Display
Signal Strength
Indicators
The GPS 12CX’s Satellite Page displays the status
of various receiver functions. The status information
will help you understand what the GPS 12CX is doing
at any given time, and will tell you whether or not the
receiver has calculated a position fix.
Sky View and Signal Strength Bars
The sky view and signal strength bars give you an
indication of what satellites are visible to the receiver,
whether or not they are being used to calculate a position fix, and the signal quality. The satellite sky view
shows a bird’s-eye-view of the position of each available satellite relative to the unit’s last known position.
The outer circle represents the horizon (north up); the
inner circle is 45º above the horizon; and the center
point is directly overhead.
You can use the sky view to help determine if any
satellites are being blocked, and whether you have a
current position fix (indicated by ‘2D NAV’ or ‘3D
NAV’ in the status field). You can also set the sky view
to a track up configuration by changing the ‘orientation’ option on the Map Page. (See pg. 16 for setup
instructions.)
When the receiver is looking for a particular satellite, the corresponding signal strength bar will be blank
and the sky view indicator will be highlighted. Once
the receiver has found the satellite, a strength bar will
appear indicating that the satellite has been found and
the receiver is collecting data from it. The satellite number in the sky view will no longer appear highlighted.
As soon as the GPS 12CX has collected the necessary
data to calculate a fix, the status field will indicate a 2D
or 3D status.
Satellite Page
Horizon
Directly
Overhead
Looking
for Satellite
45° Above
Horizon
Satellite
Being Used
9
REFERENCE
Satellite
Status
Page
Receiver Status
Receiver Status OptionsReceiver Status Options
Receiver Status Options
Receiver Status OptionsReceiver Status Options
To access the EZ-Init feature,
without satellite coverage press
ENTER
while the Satellite Sta-
tus Page is displayed.
Receiver Status
Receiver status is indicated at the top left of the
page, with the current horizontal accuracy (estimated position error, in feet or meters) at the top
right. The status will be shown as one of the following conditions:
SearchingSearching
Searching – the GPS 12CX is looking for any
SearchingSearching
available satellites in view.
AutoLocateAutoLocate
AutoLocate – the GPS 12CX is initializing and
AutoLocateAutoLocate
collecting new almanac data. This process can take
5 minutes, depending on the satellites currently in
view.
AcquiringAcquiring
Acquiring – the receiver is collecting data from
AcquiringAcquiring
available satellites, but has not collected enough data
to calculate a 2D fix.
2D Nav (2D Navigation)2D Nav (2D Navigation)
2D Nav (2D Navigation) – at least three satel-
2D Nav (2D Navigation)2D Nav (2D Navigation)
lites with good geometry have been locked onto and
a 2-dimensional position fix (latitude and longitude)
is being calculated. ‘2D Diff’ will appear when you
are receiving DGPS corrections in 2D mode.
3D Nav (3D Navigation)3D Nav (3D Navigation)
3D Nav (3D Navigation) – at least four satel-
3D Nav (3D Navigation)3D Nav (3D Navigation)
lites with good geometry have been locked onto,
and your position is now being calculated in latitude, longitude and altitude. ‘3D Diff’ will appear
when you are receiving DGPS corrections in 3D
mode.
Poor Cvg (Poor GPS Coverage)Poor Cvg (Poor GPS Coverage)
Poor Cvg (Poor GPS Coverage) – the receiver
Poor Cvg (Poor GPS Coverage)Poor Cvg (Poor GPS Coverage)
isn’t tracking enough satellites for a 2D or 3D fix
due to bad satellite geometry.
Not UsableNot Usable
Not Usable – the receiver is unusable, possibly
Not UsableNot Usable
due to incorrect initialization or abnormal satellite
conditions. Turn the unit off and back on to reset,
and reinitialize the receiver if necessary.
SimulatorSimulator
Simulator – the receiver is in simulator mode.
SimulatorSimulator
EZinit Option Prompt
The Satellite Page also provides access to the
EZinit prompt whenever a position fix has not been
calculated. (The unit must be in searching, AutoLocate, acquiring, simulator, or poor coverage mode.)
This allows you to reinitialize the unit (see Appendix A), and is useful if you have traveled over 500
miles with the receiver off and must initialize your
new position.
10
EZinit Option Prompt (continued)
(The EZinit prompt will automatically appear if the
receiver needs to be initialized. The prompt may also
appear during normal use if the antenna is shaded or
the unit is operated indoors.)
Battery Level Indicator
The Satellite Page also features a battery level indicator, located to the left of the sky view, which displays
the strength of the unit’s batteries.
The battery level indicator is calibrated
for alkaline batteries. Ni-Cad and lithium
batteries will not display accurately.
The GPS 12CX features a rechargable internal
lithium battery that will maintain the unit’s memory
for several months without batteries installed. When
new batteries are installed or the unit is operated on
external power, the internal lithium battery will renew
its charge.
Backlight Bulb Icon
The GPS 12CX features three level (off, low, high)
full-screen backlighting. Anytime the backlight is on, a
bulb icon will be displayed on the satellite page.
Emergency Erase Function
You may erase the GPS 12CX’s memory in four
quick steps. This will cause all stored data to be deleted, including routes, waypoints, and the track log.
To erase all stored data:
1. Ensure that the GPS 12CX is turned off.
2. While holding down the MARK key, turn the unit o n .
Once the unit is on release the keys. A warning message will appear with ‘YES’ highlighted, and ask you to
confirm your selection.
3. If you do wish to complete the emergency erase, press
ENTER
to confirm.
4. If you do not wish to erase all stored data, press
the
ROCKER
press
When the Emergency Erase is complete, a message
will verify that the “Stored Data Was Lost”.
to the right to select ‘NO’ then
ENTER
.
REFERENCE
Satellite
Status
Page
Backlight Bulb IconBacklight Bulb Icon
Backlight Bulb Icon
Backlight Bulb IconBacklight Bulb Icon
+
Emergency EraseEmergency Erase
Emergency Erase
Emergency EraseEmergency Erase
Emergency Erase AbortEmergency Erase Abort
Emergency Erase Abort
Emergency Erase AbortEmergency Erase Abort
11
REFERENCE
Position
Page
Position PagePosition Page
Position Page
Position PagePosition Page
User Selectable OptionsUser Selectable Options
User Selectable Options
User Selectable OptionsUser Selectable Options
To Reset TTIME, MXSPD,To Reset TTIME, MXSPD,
To Reset TTIME, MXSPD,
To Reset TTIME, MXSPD,To Reset TTIME, MXSPD,
AVSPD, or TRIPAVSPD, or TRIP
AVSPD, or TRIP
AVSPD, or TRIPAVSPD, or TRIP
Position Page
The second page in the GPS 12CX’s primary page
sequence is the Position Page. This page shows you
where you are, what direction you’re heading, and how
fast you’re going, and it’s most useful when you are
traveling without an active destination waypoint. The
Compass Tape at the top of the page is a graphic representation of the track, and indicates the direction you’re
heading while you’re moving.
Directly below this display are the track, speed, trip
odometer and the altitude (default) fields. Below these
fields is the position field. The position field indicates
your current latitude and longitude in degrees and minutes. The GPS 12CX uses this basic information to mark
exact positions as waypoints, which help guide you from
one place to another. The bottom of the page contains a
12- or 24-hour clock.
Both the trip odometer and the altitude fields are
user selectable, and both offer a trip odometer, trip timer,
and elapsed time. This way, you can always be sure of
viewing this information regardless of the option you’ve
selected for the other user-selectable field.
The following user-selectable options are available on
the Position Page:
Trip Odometer (TRIP)— total distance traveled since reset.
Trip Timer (TTIME)— total (cumulative) time in which a
ground speed has been maintained since last reset.
Elapsed Time (ELPSD)— total time in hours and min
utes since last reset.
Average Speed (AVSPD)— average speed traveled since
last reset.
Maximum Speed (MXSPD)— maximum speed traveled
since last reset.
Altitude (ALT)— v ertical distance above mean sea lev el.
To reset TTIME, MXSPD, AVSPD, or TRIP:
1. Highlight the user-selectable field, and press
ENTER
. ‘Reset’ will appear as a selectable option.
2. Press
ENTER
to confirm or
The trip odometer, trip timer, and average speed
fields are linked. Resetting one of these options in a userselectable field will automatically reset the corresponding data in the other. This ensures that information
shown in these fields reflects your current trip.
QUIT
to exit.
12
Maximum Speed Field
To obtain the most accurate reading of your maximum speed, keep in mind that due to the sensitivity of
the GPS 12CX’s antenna, your maximum speed value
may include the effects of rapid movement, such as
swinging your arm while holding the unit.
To reset the maximum speed field:
1. Highlight the ‘MXSPD’ field, and press
2. Press
ENTER
to confirm the ‘RESET?’ prompt.
ENTER
.
Altitude Field
When the GPS 12CX is acquiring satellites or navigating in the 2D mode, the last known altitude is used
to compute your position. You may also manually enter your altitude for greater accuracy. In cases where
the GPS 12CX has 2D coverage, entering your approximate altitude will enable the receiver to determine a
more accurate position fix.
To enter an altitude:
1. Highlight the ‘ALT’ field, and press
2. Enter a value, and press
ENTER
ENTER
.
.
Position Field
The GPS 12CX displays the current GPS location in
degrees-minutes -decimal minutes (default) or a variety of user selectable position formats. See page 39 for
more information on user selectable position formats.
12/24 Hour Clock
The GPS clock can be configured to display in a 12
or 24 hour format. For more information on setting up
the clock see page 37.
REFERENCE
Maximum Speed
& Altitude Fields
Maximum Speed ResetMaximum Speed Reset
Maximum Speed Reset
Maximum Speed ResetMaximum Speed Reset
Entering an AltitudeEntering an Altitude
Entering an Altitude
Entering an AltitudeEntering an Altitude
Position FieldPosition Field
Position Field
Position FieldPosition Field
13
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