Contents Table of Contents Part I GPX Pro 1 Circuit Racing Mode ........................... 1 Basic Operation ................................1 More Details ................................5 Menus ................................7 2 Point-to-Point Racing Mode ........................... 11 Basic Operation ................................11 More Details ................................13 Menus ................................
Page 4
GPX Pro Manual Battery and Charging ................................50 Pow ering Dow n ................................50 Mem ory ................................51 File Maintenance ................................51 Other Notes ................................52 10 Introduction to GPS ........................... 52 11 Troubleshooting ........................... 53 Part II XTStudio 1 Loading sessions ...........................
Page 6
GPX Pro Manual NOTE: if the GPX does not power up by pressing any button, try pressing all four buttons simultaneously. If this does not power up the GPX, then the internal rechargeable battery is probably discharged and will need to be charged.
Page 8
GPX Pro Manual You move from session to session by pressing Left and Right as desired. You can at this point also press Menu to return to the main screen. To review the laps for a session, press Select from that summary screen and you will see the lap detail: Press the Left and Right arrow button to cycle through the laps for that session.
Page 10
GPX Pro Manual finish line to be, and set the start/finish line via the GPX’s menu system (Track options, Set start/ finish line of a new track). This point will now form the basis for the start/finish line when you start racing the track.
Page 12
GPX Pro Manual Maintain splits (select a track) Add split – adds a new split for this track. There is a limit of 5 splits. Remove a split – removes the selected split (a little box indicates which split will be removed when you press Select) Remove all splits –...
Page 14
GPX Pro Manual (confirmation required) Delete all tracks and sessions -- see section on File Maintenance (confirmation required) File system check – checks the integrity of the GPX’s built-in file system Display Formats and Units Time Format – specifies how times will be displayed...
Page 16
GPX Pro Manual the arrows, go to Create a new track, and press Select. Enter the name of the new track using arrows and Select. Press Menu when the name is complete. Now, physically go to the starting point of the race. On the main screen, make sure you have a good GPS signal (4 or more satellites, less than 5.00 EHPE).
Page 18
GPX Pro Manual If a coordinate contains more decimal points than the GPX can handle, you can safely ignore the extra digits. Use the Left and Right arrows to change each position of data entry, and press Select to go to the next position.
Page 20
GPX Pro Manual Set finish point Set split # 1 point Set split # 5 point Coordinates via keypad entry - enter known latitude and longitude (select from list of tracks) Set start point Set finish point Set split # 1 point...
Page 22
GPX Pro Manual Delete a track and its sessions - see section on File Maintenance (confirmation required) Delete all sessions for a track -- see section on File Maintenance (confirmation required) Delete all session -- see section on File Maintenance...
GPX Pro Manual 100 mph; 0-30-0, 0-60-0, 0-100-0 mph; and a roll-on mode which times and measures from a programmable start speed to a programmable stop speed (for example, 60-100 mph). 1.3.1 Basic Operation In Drag Racing mode, you can select from the following types of drag race via the menu item Type of drag race: 1/8 mile;...
GPX Pro Manual sensitivity to a lower setting. 1.3.3 Menus Type of drag race 1/8 mile 1/4 mile 1 mile 0-30 0-60 0-100 0-30-0 0-60-0 0-100-0 Roll-on - times race from a specified start speed (roll-on start speed) to a higher stop...
Page 28
GPX Pro Manual completed Always ON – always on (consumes more battery power!) Backlight brightness – a value from 1-10 controlling the brightness (higher values use more battery power!) LCD contrast – adjusts the contrast of the LCD panel Normal or reverse display Normal display –...
GPX Pro Manual Clear personalization line 1 Clear personalization line 2 Show Version Information – displays information about the GPX software version Reset settings to factory default – resets all settings. Does not delete sessions or tracks. (confirmation required) Device mode – changes the basic racing mode of the GPX Circuit Racing –...
Page 32
Cabling and Electrical Information There are two sets of expansion cables supplied with the GPX Pro, labeled “A” and “B”. If you use these expansion cables, make sure that you plug the “A” cable into the “A” connector and the “B”...
Page 34
GPX Pro Manual Wiring Summary – CABLE “A” Black wire Connect to vehicle’s negative battery terminal Red wire Connect to (preferably switched) source of 12V (positive battery terminal) Green wire Digital input # 5 Blue wire Connect to coiled wire around spark plug if...
1.7.1.2 Wiring with Scotchlok Connectors Included with your GPX Pro is a set of Scotchlok connectors that can be pressed onto your wires with no stripping or soldering required. Supplied initially are 6 of these connectors in order to begin wiring your vehicle to collect data. More Scotchloks and color-coded wiring can be purchased in our DAQ Wire Kits at www.xtracing.com.
GPX Pro Manual from the list. Select Custom if you want to select one of the Generic types. Pressing Select on an Hz entry allows you to change the sampling rate for that input. You should not record data at a higher sample rate than you need...
GPX Pro Manual Then, use the arrows to make your choice, and press Select: In addition, a coupled input may need to have an internal threshold value changed. This threshold value is used by the GPX's internal circuitry for determining a valid signal. For coupled RPM capture, you may need to adjust both the threshold, and the number of wraps around the spark plug wire, to obtain a reliable RPM reading.
GPX Pro Manual Using the arrows, select the temperature; when the "gun" reads that temperature, press Select: Repeat this up to 10 times. You should try to get a pretty nice distribution of temperatures from the expected lowest to expected highest temperature.
GPX Pro Manual NOTE: When you are going below about 3mph (5kph), the gear will be reported as "N" when utilizing rpm/speed ratio to report gear. There is one particular advantage to using the rpm/speed ratio for capturing gears (even if you have a gear sensor), if you are already capturing RPM: using this method does not "use up"...
GPX Pro Manual A typical linear potentiometer has 3 wires -- positive voltage, ground, and the output signal. Depending on the extension of the slider, the output signal's voltage will vary continuously between the positive voltage and ground. For the GPX, the positive voltage should be connected to a voltage between +3V and +5V. A convenient source of +3V is the RED WIRE OF CABLE "B".
GPX Pro Manual 1.7.4.3 Temperature This is for calibrating a thermistor input, with up to 10 calibration points. See the section on Temperature under Typical Inputs for more information. 1.7.4.4 A Raw input has no calibration at all. It merely reports a number from 0 to 1023, where 0 represents 0 volts, and 1023 represents about 5.0 volts.
GPX Pro Manual Miscellaneous Information 1.9.1 Tach LCD display and LED/Shift lights Tach LCD display If you are connected to an RPM input, you have several different ways of displaying the current RPM. On any main screen or running ("spinner") screen, you may display the RPM as text (e.g., 11200 or 11.2K).
GPX Pro Manual 1.9.3 Normal / Reverse LCD Display You might find that in darker conditions, (e.g., night racing), that the combination of Reverse LCD display (white display on a dark background), along with the backlight, might be a useful configuration.
GPX Pro Manual the GPS as the basis, and, using the arrows, you can increase the time of day (press Right) (UTC +) or decrease the time of day (press Left) (UTC -) in 15-minute increments until the time shown is correct for your local time.
GPX Pro Manual Delete all sessions for a track - this deletes all races at a track, but does not delete the track information (start/finish/splits). Delete all sessions -- deletes all races in the GPX. All tracks remain. Delete all tracks and sessions -- deletes all races and tracks.
GPX Pro Manual might not get the normal "PC connected" message. In that case, disconnect the GPX, wait a few seconds, and try again. XTStudio A perfect companion to the myriad functions in the GPX, XTStudio allows you to take the data gathered on track and analyze it in detail on your Windows enabled PC.
Page 59
The other option is only used if the device you are connecting is a replacement (due to buying a new one or sometimes from and authorized repair with XT Racing). In this case, you will choose the existing database entry that this device is replacing, then click Replace an existing device.
Page 62
GPX Pro Manual Open database file and choose the old gpstudio.dat file from the file dialog (usually in My Document\GPStudio). After XTStudio successfully detects the data file as a GPStudio database you can click Next to specify the destination profile to import the sessions.
GPX Pro Manual Once the import is complete all of the sessions will appear in the session tree under the new (or existing) profile. 2.1.4 Importing your friend's sessions XTStudio allows you to share sessions with your friends. By exporting sessions from your database and then emailing or posting them to a forum, your friends can then import the session into their database and compare all of the available data.
GPX Pro unit correctly for the track you are racing at so the date/time offset will be correct when you download the session into XTStudio.
Page 66
GPX Pro Manual Circuit sessions For circuit tracks, each session you have raced will be displayed under the track name, and under each session there will be an entry for each lap in that session. In addition to the laps for the session there are two entries for pre-roll and post-roll.
The device options page is typically used only by the support staff from XT Racing if you have a problem with your device. You can also delete a profile and all of its sessions by choosing "Delete Profile"...
GPX Pro Manual · Export session for TrackVision - this allows you to export your session for use with TrackVision software to synchronize your data with a video 2.2.3 Track filter The session track filter allows you to hide certain tracks from the session tree without deleting them from your sessions database.
GPX Pro Manual The inputs can be automatically set to the full range by clicking on the Use full input range option. By turning this option off you will have access to the number boxes that will allow you to specify the minimum and maximum value for the input.
GPS signal quality is low. A low signal quality could mean that you need the GPX Pro external antenna. · TPS (or another DAQ channel name) displays the DAQ channel value from red (0%) to green (100%).
Graph bar The graph bar will graph data values captured with the GPX Pro. With the ability to plot multiple laps and zoom in and out on the data, the graph bar provides a powerful tool for race analysis. In addition, since you can add multiple graph bars to your XTStudio window, graphing multiple variables at once is possible.
GPX Pro Manual input. If you have acceleration turned on and calibrated, then the acceleration data will appear as two entries in the list. · Accel lat - the latitudinal acceleration, which is the acceleration to the right or left of the direction you were traveling;...
GPX Pro Manual 2.4.4 Data bar The data bar displays detailed information for each comparison item at the current system time. The information includes the current time, current distance, lap time, lap distance. To add a data bar to the screen use the menu item Window -> Add data bar If data acquisition channels are connected and calibrated, then each of the DAQ channels will be displayed.
Page 82
GPX Pro Manual window. This is used when you want to compare track map views from one lap to another. For example, to compare where on the track you started accelerating in one lap versus another, simply increase the offset to separate the display. For small tracks, or tracks with tight turns to large, an offset can result in a display that overlaps itself, so set the offset carefully for accurate analysis.
GPX Pro Manual 2.4.5 Gauge bar The gauge bar displays a series of circular gauges where the current data values are shown for a given data channel. Multiple gauge bars can be added to XTStudio and multiple gauges can be added to a single gauge bar.
Page 86
GPX Pro Manual Starting the screen designer for the first time will bring up the designer with no layout file loaded, if you have already started designing screens, then the designer will open the last layout you were editing. The designer window is split up into two sections, the screen display on the left and the object editor on the right.
The file menu allows you to maintain your layout files. The file menu is also where you can send the opened layout to the GPX Pro (only available if the GPX Pro is currently connected to the computer) or you import certain screens from a friend's layout file.
The update interval tells the GPX Pro timer how often to update the screen with this text value, or if there are multiple rotating text values then how often to switch between the text values. The update...
Page 89
A screen variable is a two letter (and up to two number) combination enclosed in curly brackets. This special sequence of characters tells the GPX Pro to insert a screen variable value in the place of the curly bracketed section. The available variables are displayed in the screen variables list.
GPX Pro Manual 2.5.4 Images The image object is used to insert an image on your screen. Again, the update interval specifies how fast the image rotates if you specify more than one image. 2.5.5 Indicators There are two indicators available. The battery graphic and the GPS antenna graphic. Simply choose which you want to display.
Windows drivers The Windows drivers are provided on the XTStudio installation CD and they are also copied to C: \Program Files\XT Racing\XTStudio\Driver after the XTStudio installation is complete. You may also need your original Windows CD when installing the driver.
Page 92
GPX Pro Manual Windows XP To begin the installation of the GPX Pro driver on Windows XP simply plug the GPX Pro into your computer's USB port. After the device is connected, the Found New Hardware Wizard will appear. Choose "No, not this time" when the wizard asks you to connect to Windows Update to search for the driver.
Page 93
Windows Vista To begin the installation of the GPX Pro driver on Windows Vista simply plug the GPX Pro into your computer's USB port. After the device is connected, the Found New Hardware Wizard will appear.
Need help?
Do you have a question about the GPX Pro and is the answer not in the manual?
Questions and answers