User manual MAGELLAN GPS 310 SATELLITE NAVIGATOR

GPS 310 Satellite Navigator User Manual WARNINGS A measure of knowledge by the user is required for proper and safe use of the Magellan GPS 310TM. READ THE USER MANUAL & WARRANTY COMPLETELY. Use Good Judgment This product is an excellent navigation aid, but it does not replace the need for careful orientation and good judgment. Never rely solely on one device for navigating. Use Care to Avoid Inaccuracies The Global Positioning System (GPS) is operated by the U.S. Government, which is solely responsible for the accuracy and the maintenance of GPS. Certain conditions can make the system less accurate. No part of this Manual may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, for any purpose other than the purchaser's personal use, without the written permission of Magellan Corporation. © Copyright 2000 by Magellan Corporation. All rights reserved. MagellanTM and GPS 310TM are the trademarks of Magellan Corporation. P/N 630786 B TABLE OF CONTENTS Introduction .................................................... 1 Welcome to the Magellan GPS 310 ..................................... 1 GPS 310 Description ........................................................... 1 Magellan GPS 310 Key Functions ....................................... 2 Getting Started ................................................ 3 Installing the Batteries ......................................................... 3 Getting Signals from Satellites ............................................. 3 Initializing the Receiver - EZStart ........................................ 4 Computing a Position .......................................................... 5 Basic Operation ............................................... 7 Saving a Position Fix ............................................................ 7 Creating a Landmark ........................................................... 8 Viewing the POSITION Screen ........................................... 9 Viewing the NAVIGATION Screens .................................. 10 Creating a GOTO Route ................................................... 13 Summary ........................................................................... 14 Working with Landmarks .............................. 15 Viewing a Landmark .......................................................... 15 Editing a Landmark ........................................................... 16 Deleting a Landmark ......................................................... 16 i GPS 310 TOC 1 10/18/99, 9:27 AM Working with Routes..................................... 17 Creating a Route ................................................................ 17 Viewing a Route ................................................................ 19 Activating/Deactivating a Route ........................................ 20 Deleting a Route ................................................................ 21 Adding Legs to a Route ...................................................... 21 Activating a Leg in a Route ................................................ 22 Editing a Leg in a Route .................................................... 23 Deleting a Leg From a Route ............................................. 24 Reversing a Route .............................................................. 24 Additional Features ....................................... 25 Viewing the Time and Date ............................................... 25 Viewing Elevation .............................................................. 25 Viewing Battery Life .......................................................... 25 Changing Coordinate Systems ........................................... 26 Changing Map Datums ..................................................... 27 Changing Distance Units ................................................... 28 Changing Time Display and Time ..................................... 28 Changing North Reference ................................................ 29 Initializing the Receiver (EZSTART) ................................. 29 Activating the Demo Mode ................................................ 30 Setting Display Contrast .................................................... 31 Using the Trip Odometer ................................................... 31 Connecting to External Devices .................... 32 NMEA Data Messages ................................... 34 Troubleshooting ............................................ 41 Frequently Asked Questions .............................................. 42 Icons .................................................................................. 44 Contacting Magellan ......................................................... 45 ii GPS 310 TOC 2 10/18/99, 9:27 AM Accessories ..................................................... 46 Attaching the Wrist Lanyard .......................... 47 Shipping/Transporting .................................. 48 Glossary ......................................................... 49 Index ............................................................. 52 iii GPS 310 TOC 3 10/18/99, 9:27 AM iv GPS 310 TOC 4 10/18/99, 9:27 AM Introduction Welcome to the Magellan GPS 310 Congratulations on your purchase of the Magellan GPS 310 satellite navigator. The GPS 310 is an easy-to-use GPS receiver designed to get you out in the "Great Outdoors" rather than spending hours reading a User's Manual. There are, however, a few items that you need to be familiar with so it is suggested that you follow along at least through the chapter on Basic Operation. Before you begin, make sure that your package includes the items listed on the GPS 310 box. If any items are missing or damaged, contact your Magellan dealer or retailer. GPS 310 Description The GPS 310 is a self-contained hand-held GPS receiver designed for general purpose position locating and navigation. It has a built-in antenna located at the top of the receiver, a backlit display, and keypad. Using two AA batteries, inserted from the battery door found at the back of the receiver, the GPS 310 will operate for up to 20 hours. 1 Magellan GPS 310 Key Functions GPS Antenna G P S 31 0 The ENTER key confirms data entries or menu selections. The NAV key accesses the Position and Navigation screens. The GOTO key is used to create a direct route to any landmark stored in memory. The MENU key is used to access the route, landmark and setup functions. The PWR key turns the receiver on and off. ENTER NAV GOTO MARK MENU The MARK key is used to create landmarks and store the current position. PWR The LIGHT key turns the light on and off. The ARROW pad is used to enter landmark names, and scroll through the series of screens and menu selections. 2 Getting Started Installing the Batteries The GPS 310 uses two AA alkaline batteries that are installed at the back of the receiver. To remove the battery cover, turn the ring of the battery door screw counterclockwise until the battery cover can be removed. Insert the new batteries as shown, being sure to respect the polarities, and replace the battery cover. + + - Replace the screw and turn the ring clockwise until the battery door is held in place securely. While the battery door does provide the waterproofing seal to the batteries, you should avoid overtightening the battery door screw. Getting Signals from Satellites Since the GPS 310 receives information from satellites orbiting the earth, the antenna needs to have a relatively unobstructed view of the sky. Large obstructions such as buildings, cliffs, and overhangs may interfere with signal reception causing your GPS 310 to take additional time to compute your location. 3 The GPS 310 is designed to fit comfortably in your hand. Hold the receiver with the antenna towards the sky. Initializing the Receiver - EZStart Before using your GPS 310 for the first time, the receiver needs to know its approximate location. Using Magellan's EZStart procedure, the GPS 310 will prompt you for the information it requires when you turn it on for the first time. You do not need to initialize your receiver each time you use it. Follow these steps to initialize the GPS 310 if this is the first time you are using it. Press PWR to turn the GPS 310 on. SELECT REGION. Use the ARROW pad to change the flashing text to select the appropriate region for your present location. Press ENTER SELECT COUNTRY or STATE. Use the ARROW pad to change the flashing text to select the country or state for your present location. Press ENTER 4 ENTER ELEVATION. Use the ARROW pad to enter the approximate elevation for your position. If unknown, leave the elevation at 0. Press ENTER ENTER TIME. Use the ARROW pad to enter your present time. Press ENTER ENTER DATE. Use the ARROW pad to enter the date. Press ENTER The GPS 310 then displays the POSITION screen and automatically begins searching for satellites that it knows are in this area for the date and time you entered. The display shown here may differ from yours depending upon the information you selected in steps 2 and 3. As the GPS 310 scans the sky, the arrow in the circle will swing around pointing to a satellite and displays, in the center of the circle, that satellite's elevation above the horizon. Computing a Position The GPS 310 will begin to acquire information from the satellites and use this information to compute your current position (called a position fix). Whether you have just 5 completed the initialization process or have just turned your GPS 310 on, the GPS 310 will display the following screens in the order shown. As the GPS 310 searches for satellites, some of the small circles around the large circle will become black indicating that the GPS 310 is tracking that satellite and receiving information. The number at the bottom right of the screen displays how many satellites are being tracked. After the GPS receiver has received positioning data from at least three satellites (approximately 2-3 minutes), it will begin computing a position fix based upon the information it is receiving. As soon as a position fix is computed, the receiver switches to the navigation screen displaying the moving compass. The word "TRACKING" is displayed in the lower right corner indicating that the receiver is computing position fixes. Note: If the receiver has not acquired a position fix in approximately 10 minutes, refer to the troubleshooting section of this manual. More information on these screens and the information they display can be found in the next chapter. 6 Basic Operation Saving a Position Fix Position fixes can be saved in memory for use later when you want to return to that position. Saved position fixes are referred to as landmarks or LMK. To save (mark) your current position press Receiver-Generated Name: The GPS 310 prompts you to enter a name or accept the receiver-generated name for this landmark. To accept the receiver-generated name (LM01 - LM99), press ENTER MARK . To quickly save a position fix, press MARK MARK . User-Created Name: To create a name (up to four characters), use the UP/DOWN arrows to change the character and the LEFT/RIGHT arrows to move the cursor to the left or right respectively. After you have input the desired landmark name press Press ENTER . ENTER to accept the current latitude and press ENTER again to accept the current longitude. MARK at Shortcut: Press anytime while viewing this screen to quickly save the position. 7 Creating a Landmark To create a landmark at a location which is not your current position, use the same procedure as saving a position with the additional step of inputting different latitude/longitude coordinates. To create a landmark press MARK . The GPS 310 prompts you to enter a name or accept the receivergenerated name for this landmark. When the desired name is displayed at the top of the screen press ENTER . Use the ARROW pad to change the latitude and press ENTER to accept. Use the ARROW pad to change the longitude and press ENTER to accept. The newly created landmark is stored in memory and you are returned to the screen that was displayed when you pressed the MARK key. Shortcut: Press MARK at anytime while viewing this screen to quickly save the position. 8 Viewing the POSITION Screen The POSITION screen displays the coordinates for your last computed position and information about any satellites that are visible. It can be accessed by pressing the NAV key. Latitude and Longitude North Indicator Satellite Pointer Number of satellites being used. Satellite Elevation Degrees above the horizon of the satellite indicated by the satellite pointer. Satellite Icons Visible but not tracked. Satellite is being tracked. Tracking Indicator Appears when the receiver has acquired enough information from the satellites to compute a position fix. You may sometimes notice that the number of satellites being tracked differs from the number of satellites being displayed graphically. This is due to more than one satellite being tracked in the same general area. 9 Viewing the Navigation Screens Without an Active Route. Without an active route the navigation screen displays your heading and the speed at which you are traveling. The lower portion of the screen displays a moving compass. The triangle at the top of the compass points in the direction you are traveling and the arrow points to north. Navigation Screen without an Active Route (Moving Compass) Current Heading Current Speed Direction of Travel North Indicator Tracking Indicator Appears when enough satellites have provided information to compute position fixes. The navigation screens display your speed of travel. In order for the North Indicator to be valid and the speed to be displayed, you must be moving at a speed greater than 2 miles per hour. 10 With an Active Route. When you have an active route the navigation screen still displays your heading and speed but also includes the bearing and distance to your destination. The moving compass is then replaced with steering information. You can use the graphical representation or the steering indicator to assist in directing you towards your final destination. Navigation Screen with an Active Route (Steering) Destination Landmark Bearing to Destination Current Heading Destination Icon Distance to Destination Current Speed North Indicator Steering Indicator Indicates the number of degrees to turn, right or left, to destination landmark. Destination Pointer Tracking Indicator Appears when enough satellites have provided information to compute position fixes. In the screen above you are traveling with a heading of 56° while your destination bearing is 34°. This would indicate that you need to turn left 22° to be on a straight line to your destination. The circle and arrow display the same information but in a visual manner. The triangle points in the direction you are traveling and the arrow points towards your destination. 11 A second navigational screen is also provided while you have an active route. This screen is very similar to the first screen except that the distance to the destination has been replaced with XTE (cross track error, the distance left or right that you are off course) and heading has been replaced with TTG (time to go). This screen provides you additional information to aid you in navigating to your destination. Second Navigation Screen with an Active Route (Steering) Destination Landmark Bearing to Destination Time to Go Time remaining to arrive at the destination at your present speed and heading Destination Icon Destination Pointer Cross Track Error Distance left or right of the desired Courseline. Current Speed North Indicator Steering Indicator Indicates the number of degrees to turn, right or left, to destination landmark. Tracking Indicator Appears when enough satellites have provided information to compute position fixes. The navigation screens and the position screen are connected to one another in a circular loop. Pressing the NAV key or using the ARROW pad while viewing one of the position or navigation screens moves you to the next screen in the loop. 12 Creating a GOTO Route The simplest form of a route is a one-leg route called a GOTO route (you are GOing TO a destination). This is routing you from your current position to a landmark stored in memory All that is required to create a GOTO route is that you have saved a landmark indicating the location of your destination. To create (activate) a GOTO Route: From any screen, press GOTO screen appears. GOTO . The To select a different landmark, use the LEFT/RIGHT ARROWS until the desired destination landmark is displayed. Press ENTER or GOTO . The display returns to the Navigation screen showing the name of the GOTO destination at the top of the screen. 13 If the receiver is not tracking sufficient satellites to compute a position fix, the start of the newly created GOTO route will be the last position computed, which may not be the current position. This GOTO route will remain the active route until a new GOTO route is created, a multileg route is activated, or the receiver is turned off. Turning off the receiver deactivates any GOTO route. Summary This completes the basic operation of the GPS 310. At this time it would be a good idea to put what you know to practice. Pick a location that you would want to come back to, your home for example. Take a position fix of the location and save it to memory, giving it a name that you will later associate with this location. Then travel a few miles away with your receiver, stop and take another position fix. Now use the GOTO key to set a GOTO route and highlight the landmark ENTER you created before and press . Your GPS 310 is ready to navigate you back to where you started. The navigation screens are now showing you the distance and bearing back to the original landmark. As you begin moving, the GPS 310 will begin using your speed and direction to compute the shortest distance back to your original starting point as well as how long it will take you to get there. The following chapters provide you with more information on using your GPS 310 that build upon what you've learned. 14 Working with Landmarks Viewing a Landmark To view a stored landmark press MENU until LMKS appears at the top of the screen. Press ENTER . The BEARING/DIS- TANCE screen for the first landmark in the receiver's memory is displayed with the bearing and distance from the last computed position fix to that landmark. To select a different landmark, use the LEFT/RIGHT arrows until the name of the landmark you wish to view is at the top of the screen. To view the POSITION screen of the selected landmark, press the UP ARROW. 15 Editing a Landmark Following the instructions under Viewing a Landmark, use the LEFT/RIGHT arrows to select the landmark you wish to edit. Press the UP ARROW until the screen displays PRESS ENT TO EDIT, then press ENTER . You can modify the landmark name and/or the coordinates for the landmark by using the UP/DOWN arrows to change the information and press ENTER to move to the next line. If the landmark you are editing is used in a route, the route will be modified to reflect the changes you made to the landmark. Deleting a Landmark Following the instructions under Viewing a Landmark, use the LEFT/RIGHT arrows to select the landmark you wish to delete. Press the UP ARROW until the screen displays PRESS ENT TO DELETE, then press ENTER . Use the LEFT/RIGHT ENTER ARROWs to confirm (YES or NO) and press . If the landmark is used in a route or is the destination landmark in a GOTO route, the GPS 310 alerts you that the landmark cannot be deleted. Remove the landmark from the route and repeat. 16 Working with Routes The route function allows you to link a series of landmarks and travel, point by point, to a final destination. D B Leg 1 The route depicted here is a three-leg route. Leg 1 extends from landmark A to landmark B, leg 2 from landmark B to landmark C, and leg 3 from C to D. The GPS 310 gives you information on the NAV screens that directs you to the destination of each leg sequentially. Creating a Route A route can contain up to 10 legs using any of the landmarks stored in memory. If there is a route already in memory you must delete the existing route before you can create a new one. Access the Route Menu by pressing MENU until ROUTE appears at the top of the screen. The display should say "PRESS ENT TO CREATE." NOTE: If the display says PRESS ENT TO VIEW there is an existing route and you must delete the existing route before creating a new one. (See Deleting a Route for details.) Press ENTER . Le A Leg 2 C g 3 17 The receiver prompts you for a starting landmark for the route. The first landmark, *POS, is your present position. Use the ARROW pad to scroll through the list of landmarks. When the desired landmark is displayed (and flashing) press ENTER . The display changes to allow the selection of the landmark to be used as the end of the first leg in the route. Use the ARROW pad to scroll through the list of landmarks. When the desired landmark is displayed (and flashing) press ENTER . Note that as you scroll through the list of landmarks, the display updates showing you the bearing and distance from the start of this leg to the displayed landmark. If the distance from the start of the leg to the end of the leg is below 0.10 miles, the message INVALID is displayed and you are prompted to select a different landmark. The screen changes to the next leg in the route with the destination landmark of the previous leg inserted as the start of the next leg. The message END ROUTE is displayed in the TO field. You may continue this route by using the ARROW 18 pad to select a landmark as the destination for this leg or press ENTER to signal the GPS 310 that this was the last leg in the route and you are finished creating a route. Continue this process for each leg in the route remembering to press ENTER with END ROUTE displayed in the TO field to finish up the route. If you accidently pressed the ARROW pad but you meant to end the route, you can still end the route by continuing to press the ARROW pad until END ROUTE is displayed again. A route may contain no more than ten legs and the GPS 310 automatically saves the route and returns to the Route Menu as soon as Leg 10 is entered. After the route has been created, the GPS 310 automatically activates the route and begins providing navigation information for the route. Viewing a Route You can view a summary of the route in memory as well as viewing the individual legs of the route. All editing commands are accessed from the View Route function as well. With a route in memory, press at the top of the display. Press MENU ENTER until ROUTE appears . 19 The first screen displayed is the ROUTE SUMMARY screen. This screen displays the start and end landmark for the entire route as well as the total distance of the route. Use the LEFT/RIGHT ARROWs to view the legs in the route. The leg screen displays the FROM and TO landmark for the leg as well as the distance and bearing for the leg. The circle graphically displays the bearing for the leg. Continue pressing the LEFT/RIGHT ARROWs to step through the other legs in the route, eventually returning to the ROUTE SUMMARY screen. Activating/Deactivating a Route With a route in memory, press at the top of the display. Press MENU ENTER until ROUTE appears . Press the UP ARROW. If the route is currently active, the display indicates: ENT TO DEACTVATE. If the route is currently deactivated, the display indicates: ENT TO ACTIVATE. Pressing will activate or deactivate the route depending upon its present status. After a route is deactivated, the route summary is displayed. If a route is activated, the NAV screen is displayed. 20 ENTER Deleting a Route With a route in memory, press at the top of the display. Press MENU ENTER until ROUTE appears . While still viewing the Route Summary screen, press the UP ARROW three times until the display indicates PRESS ENT TO DELETE. Press ENTER . You will be prompted to confirm the deletion. Use ENTER the ARROWs to select YES or NO and press . Adding Legs to a Route With a route in memory, press at the top of the display. Press MENU ENTER until ROUTE appears . While still viewing the Route Summary screen, press the UP ARROW until the display indicates PRESS ENT TO ADDLEG. Press ENTER . The display changes to the Add Leg screen with END ROUTE flashing. As in creating a route, use the ARROW pad to select the new landmark for this leg. With the new TO landmark flashing, press ENTER . The newly created leg is added to the route. The process of adding a leg continues until you select END ROUTE or the route is full. 21 Activating a Leg in a Route As you are navigating you may decide that you no longer wish to continue on the leg that you are now using. Instead you wish to use another leg of the route. You will need to activate the leg of the route with the desired destination (TO landmark). Press Press MENU ENTER until ROUTE appears at the top of the display. . Use the LEFT/RIGHT ARROWs until the leg you wish to activate is displayed. Press the UP ARROW. If the leg is not active, the display indicates ENT TO ACTIVATE. Press ENTER . The leg has become activated, the NAV screen is displayed, and the receiver begins to compute the necessary information to continue you on the route using the leg you selected. If the display indicates ENT TO DEACTVATE, it means that the receiver is using this leg to compute the navigational information. Pressing ENTER at this screen not only deactivates the leg and returns to the leg summary screen, but deactivates the route as well. 22 Editing a Leg in a Route Press Press MENU ENTER until ROUTE appears at the top of the display. . Use the LEFT/RIGHT ARROWs until the leg ENTER you wish to edit is displayed. Press the UP ARROW until PRESS ENT TO EDIT is displayed and press . The Edit Leg screen is displayed with the FROM landmark flashing. Use the LEFT/RIGHT ARROWs to select a new FROM landmark and press ENTER . The TO landmark begins flashing alerting you that the GPS 310 is ready for you to select a new TO landmark. Press ENTER to accept the TO landmark as it is or use the LEFT/RIGHT ARROWs to select a new TO landmark and press ENTER . The leg before and after the one you just edited will be automatically changed to reflect the changes that were made to this leg. 23 Deleting a Leg From a Route Press Press MENU ENTER until ROUTE appears at the top of the display. . Use the LEFT/RIGHT ARROWs to find the leg of the route that you want to delete. Press the UP ARROW until PRESS ENT TO DELETE is displayed and press ENTER . The GPS 310 prompts you to confirm the deletion of the leg. Use the LEFT/RIGHT ARROW to select (flashing) YES to delete or NO to cancel. If you attempt to delete a leg that causes the route to contain a leg that is under the 0.1 mile leg distance limitation, the receiver will display the message INVALID DELETE. Reversing a Route Press Press MENU ENTER until ROUTE appears at the top of the display. . Press the DOWN ARROW until PRESS ENTER ENT TO REVERSE is displayed and press . The GPS 310 prompts you to confirm the action. Use the LEFT/RIGHT ARROW to select (flashing) YES to reverse or NO to cancel and press ENTER . 24 Additional Features Viewing the Time and Date You can view the current time and date (obtained from the satellites) by repeatedly pressing the is displayed at the top of the screen. MENU key until TIME Viewing Elevation You can view the last computed elevation for your GPS 310 by repeatedly pressing the MENU key until ELEVATION is displayed at the top of the screen. Viewing Battery Life You can view the estimated battery life remaining by repeatedly pressing the MENU key until POWER is displayed at the top of the screen. Full Battery Life 40-60% Battery Life Low Batteries 25 Changing Coordinate Systems You may wish to change the coordinate system that your GPS 310 uses to display the position and landmarks coordinates. You have the following options: LAT/LON using degree/ minutes (DEGMIN), LAT/LON using degree/minutes/ seconds (DEGMINSEC),Universal Transverse Mercator (UTM), OSGB, Irish, Swiss, Swedish, Finnish, French, or German. The choice you make will depend upon the maps or charts you may be using. You want your GPS 310 to be displaying the coordinates in the same mode that your map or chart uses. The following example shows the same position in three different modes. LAT/LON (DEGMIN) LAT/LON (DEGMINSEC) UTM Press the MENU key until SETUP is displayed at the top of ENTER the screen and press . Press ENTER again and the currently used coordinate system begins to flash. Use the RIGHT/LEFT ARROWs to scroll through the list of coordinate systems and press ENTER when the desired system ENTER is displayed. Some coordinate systems require additional zone or format information. Use the arrow pad and select the proper zone or format. 26 to Changing Map Datums If you are using a map (or chart) in conjunction with your GPS 310 you need to insure that the datum used by the GPS 310 matches the one used in creating the map. The map datum can usually be found in the legend box of the map or chart. The GPS 310 offers the choices of WGS84 (default), NAD27, AUST 84, EUROPE 50, GRB 36, IRELAND, KKJ, RT90, S AMERICA 69, SWISS, FRENCH, GERMAN, and TOKYO. Press the MENU key until SETUP is displayed at the top of ENTER the screen and press . Use the RIGHT ARROW until ENTER SETUP MAP DATUM is displayed. Press again, the currently used map datum begins to flash. Use the RIGHT/ LEFT ARROWs to scroll through the list of map datums and press ENTER when the desired datum is displayed. Some coordinate systems can be used only with a specific datum (i.e., OSGB coordinate system can be used only with the GRB 36 datum). Your GPS 310 automatically selects the proper datum when you select that coordinate system and will not allow you to change the datum until you select a different coordinate system. 27 Changing Distance Units Your distance units can be in miles and miles per hour (MIMPH), nautical miles and knots (NM-KTS), or kilometers and kilometers per hour (KM-KPH). To change the units, press MENU until SETUP is displayed at the top of the screen . Use the RIGHT ARROW until SETUP ENTER and press ENTER UNITS is displayed. Press again and, the distance ENTER unit of measure begins to flash. Use the RIGHT/LEFT ARROWs to scroll through the list of units and press when the desired unit of measure is displayed. Changing Time Display and Time To change the way that time is displayed (12 HOUR- default, 24 HOUR, or UT), repeatedly press MENU until SETUP is ENTER displayed at the top of the screen and press ENTER . Use the RIGHT ARROW until SETUP TIME is displayed. Press again and the time display begins to flash. Use the to select. The screen changes to TIME SET. Use the ENTER RIGHT/LEFT ARROWs to scroll through the list and press ENTER ARROW pad to set the time and press the time format.) when done. (You are not prompted to set the time if you selected UT as When you change your clocks because of daylight savings time, remember to change the time in your GPS 310. 28 Changing North Reference The GPS 310 uses magnetic north as a default reference for all navigation computations. You can change this to true north (good if you are also using a map) or back to magnetic north (default, good to use if you are using a compass) under the SETUP menu. Press the MENU key until SETUP is disENTER played at the top of the screen and press Press ENTER . Use the RIGHT ARROW until SETUP NORTH REF is displayed. again, the north reference begins to flash. Use ENTER the RIGHT/LEFT ARROWs to scroll between MAGNETIC and TRUE and press to select. Initializing the Receiver (EZSTART) If you desire to re-initialize the receiver, (for example, you have moved more than 300 miles since the last time the receiver was turned on) you can do so in the SETUP menu. Press MENU until SETUP is displayed at the top of the screen . Use the RIGHT ARROW until SETUP ENTER and press ENTER PRESS ENT TO EZSTRT is displayed. Press again and the receiver prompts you to enter the necessary data. SELECT REGION. Use the ARROW pad to change the flashing text to select the appropriate region for your present location. Press ENTER . 29 SELECT COUNTRY or STATE. Use the ARROW pad to change the flashing text to select the country or state for your present location. Press ENTER . ENTER ELEVATION. Use the ARROW pad to enter the approximate elevation for your position. If unknown, leave the elevation at 0. Press ENTER . ENTER TIME. Use the ARROW pad to enter your present time. Press ENTER . ENTER DATE. Use the ARROW pad to enter the date. Press ENTER . Note: The prompts to enter time and date will not appear if your receiver has already collected this information from the satellites. Activating the Demo Mode To turn on the Demo Mode, press MENU until SETUP is ENTER displayed at the top of the screen and press toggle between ON or OFF, press ENTER . Use the RIGHT ARROW until SETUP DEMO is displayed. To . The present . status, on or off, will flash. Use the LEFT/RIGHT ARROWs to switch between on and off and press ENTER While in the Demo Mode, the receiver displays sample information on the POSITION and both NAVIGATION screens. 30 Setting Display Contrast To adjust the contrast of the display, press MENU until SETUP is displayed at the ENTER top of the screen and press . Use the LEFT/RIGHT ARROW until SETUP CONTRAST is displayed and press ENTER . Use the LEFT/RIGHT ARENTER ROW keys to change the contrast to the desired level and press . Using the Trip Odometer Press MENU until the ODOMETER is displayed. The odometer will keep track of the distance you have traveled while using your GPS 310. To reset the odometer press ENTER . You will be asked to confirm that you really want to reset the odometer to zero. Use the LEFT/RIGHT ARROWs to highlight (blinking) YES and press ENTER . 31 Connecting to External Devices The GPS 310 is designed to interface to a PC or other devices using a data cable. The GPS 310 continuously outputs NMEA messages through the data port at a rate of every 1 second. The GSV message is output all the time including when the receiver is not computing fixes. After the first fix is computed, GSA, GLL, GGA and RMC messages are also output. These messages contain position, time, date, satellite position as well as other status information. These messages can be used by a variety of navigation software packages available for the personal computer. If the receiver is computing fixes and has a route set (either a GOTO or a multi-leg route) the RMB and APB messages are also output. The RMB and APB contain information (steering, distance to destination, etc.) used to navigate to the route destination. These messages are used by autopilots and marine navigation software. Connecting the GPS 310 to a Personal Computer (PC) Connect one end of the data cable to the back of the GPS 310 and connect the other end of the data cable (the end with the DB9 connector) to the serial port on the personal computer. Now any application that you run on your PC that accepts NMEA messages will be able to receive that information from your GPS 310. NOTE: Be sure that your PC software is set to the COM port that you connected your data cable to and that the baud rate is set to 4800 baud. 32 Connecting the GPS 310 to an Autopilot Device To connect the GPS 310 to an autopilot or other external device you may need to cut off the DB9 connector and "hard wire" the cable to the device. The cable configuration is as follows: Orange: Data Out Yellow: Data In Black: Ground Red: Power (DO NOT USE) Refer to the manual on the external device and connect the wires to their proper place. Be careful and double check your connections before applying power to the external device as an improper connection could damage the GPS 310 and void its warranty. Connecting the GPS 310 to a DGPS Receiver The GPS 310 is capable of receiving differential corrections from a differential receiver for improved accuracy. By connecting a differential beacon receiver (DBR), such as the Magellan DBR IV, to the GPS 310, corrections are automatically applied to the position and velocity computed by the receiver. If corrections are being applied to the GPS 310, "DGPS" will appear on the top of the position screen. The GPS 310 accepts standard RTCM v2.1 messages at 4800 baud rate. You can use either the Data Cable, Power/Data Cable or PC Cable with Cigarette Lighter to connect the GPS 310 to the DBR. 33 NMEA Data Messages NMEA DATA MESSAGES. NMEA data is output at 4800 baud, 8, N, 1, checksum off. These settings are acceptable to most equipment and software applications. Your GPS receiver outputs the following NMEA 0183 version 2.1 messages. GSA, GSV, GLL, GGA, RMB, RMC and APB. Vers. 2.1 NMEA is recommended for navigation data, satellite data and autopilots. NMEA Message Definitions APB Revised autopilot message contains all of the above plus: heading to steer toward destination, bearing from the present position to the destination (magnetic or true). GPS position, time, fix quality, number of satellites used, HDOP (Horizontal Dilution of Precision), differential reference information, and age. GPS-derived latitude, longitude, and time of fix. GPS receiver operating mode, satellites used in the navigation solution reported by the $--GGA sentence and DOP (Dilution of Precision) values. Number of satellites in view, satellite numbers, elevation, azimuth, and SNR value. Data status, cross track error, direction to steer, origin, destination landmark, landmark location, bearing to destination, and velocity toward the destination. Time, latitude, longitude, speed, heading, and date. GGA GLL GSA