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V102 GPS CompassUser GuidePart No. 875-0276-000 Rev B1

Chapter 2: InstallationMounting LocationMounting OrientationMounting OptionsPowering the V102Connecting the V102 to External Devices

6Chapter 2: InstallationMounting LocationThis section provides information on determining the best location for the V102.GPS ReceptionWhen considering

V102 GPS Compass User Guide7V102 Environmental ConsiderationsThe V102 is designed to withstand harsh environmental conditions; however, adhere to the

8Chapter 2: InstallationBefore installing the V102 use the following diagram to ensure there are no nearby devices that may cause VHF interference.Fig

V102 GPS Compass User Guide9Mounting OrientationThe V102 outputs heading, pitch, and roll readings regardless of the orientation of the antennas. Howe

10Chapter 2: InstallationFigure 2-2 and Figure 2-3 provide mounting orientation examples.Figure 2-2: Recommended orientation and resulting signs of HP

V102 GPS Compass User Guide11V102 AlignmentThe top of the V102 enclosure incorporates sight design features to help you align the enclosure with respe

12Chapter 2: InstallationMounting OptionsThe V102 allows for two different mounting options: flush mount and pole mount.• Flush mount - The bottom of

V102 GPS Compass User Guide13V102 DimensionsFigure 2-6 illustrates the physical dimensions of the V102.Figure 2-6: V102 dimensionsCLCL68.90 mm(2.71”)S

14Chapter 2: InstallationPower/Data Cable ConsiderationsBefore mounting the V102 consider the following regarding power/data cable routing:• Cable mus

This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interf

V102 GPS Compass User Guide15Figure 2-7: Flush mounting holes on bottom of V102Note: You do not necessarily need to orient the antenna precisely as yo

16Chapter 2: Installationattaching the cable end to the port on the V102 (see “Connecting the power/data cable” on page 17).Flush mounting the V1021.

V102 GPS Compass User Guide17Note: See “V102 Dimensions” on page 13 for information on routing the power/data cable.Connecting the power/data cable1.

18Chapter 2: InstallationPole MountNote: This pole mount does not meet the IEC 60945, section 8.7 for vibration.Keep the following in mind when using

V102 GPS Compass User Guide19attaching the cable end to the port on the V102 (see “Connecting the power/data cable” on page 20).Routing the cable• Run

20Chapter 2: InstallationConnecting the power/data cable1. Align the cable connector keyway with the V102 connector key.2. Rotate the cable ring clock

V102 GPS Compass User Guide21Powering the V102Power ConsiderationsFor best performance use a clean and continuous power supply. The V102 power supply

22Chapter 2: InstallationConnecting the V102 to External DevicesPower/Data Cable ConsiderationsThe V102 uses a single 15 m (49 ft) cable for power and

V102 GPS Compass User Guide23Power/Data Cable Pinout SpecificationsFigure 2-9 show the power/data cable pinout, while Table 2-1 shows the cable’s pino

24Chapter 2: InstallationSerial PortsThe V102 offers position and heading data via two full-duplex (bi-directional) RS-232 serial ports. In addition t

Notice to CustomersContact your local dealer for technical assistance. To find the authorized dealer near you, contact us at:Hemisphere GPS4110 9th St

V102 GPS Compass User Guide25There is likely little reason to connect the receive data input of the V102 to another device unless it is able to send c

Chapter 3: OperationGPS OverviewV102 OverviewCommon Commands and Messages

28Chapter 3: OperationGPS OverviewFor your convenience, both the GPS and SBAS operation of the V102 features automatic operational algorithms. When po

V102 GPS Compass User Guide29When the V102 is properly positioned, the satellites transmit coded information to the antennas on a specific frequency.

30Chapter 3: OperationV102 OverviewThe V102 provides accurate and reliable heading and position information at high update rates. To accomplish this t

V102 GPS Compass User Guide31Figure 3-1: Secondary antenna’s search volumeNote: The V102 moving base station algorithm only uses GPS to calculate head

32Chapter 3: OperationHemisphere GPS’ GPS Technical Reference describes the commands and methodology required to recalibrate, query, or change the sen

V102 GPS Compass User Guide33is lost because the satellite signals were blocked. The gyro provides a relative change in angle since the last computed

34Chapter 3: Operationin an environment that has high dynamics for the first five to ten minutes instead of sitting stationary.With the gyro enabled,

V102 GPS Compass User GuideiiiContentsChapter 1 IntroductionOverview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

V102 GPS Compass User Guide35message. The default value of this constant is 0.5 seconds of smoothing. Increasing the time constant increases the level

36Chapter 3: OperationCommon Commands and MessagesNote: When selecting your baud rate and message types, use the following calculation to determine yo

V102 GPS Compass User Guide37In Table 3-3 the Info Type value is one of the following:•P = Position• V = Velocity, Time• H = Heading, Attitude• S = Sa

38Chapter 3: Operation*$GPHDG H Provides magnetic deviation and variation for calculating magnetic or true heading*see last bullet in Note at end of t

V102 GPS Compass User Guide39Notes:• The GP of the message is the talker ID.• GPGRS, GPGSA, GPGST, and GPGSV support external integrity checking. They

40Chapter 3: OperationTable 3-5: Parameters specific to $JATT commandParameter Description Query SpecifyCOGTAU Set/query COG time constant (0.0 to 360

Appendix A: Troubleshooting

42Appendix A: TroubleshootingTable A-1 provides troubleshooting for common problems.Table A-1: TroubleshootingSymptom Possible SolutionReceiver fails

V102 GPS Compass User Guide43No SBAS lock • Verify the V102 has a clear view of the sky• Verify the lock status of SBAS satellites (this can be done w

44Appendix A: TroubleshootingNo DGPS position in external RTCM mode• Verify the baud rate of the RTCM input port matches the baud rate of the external

ivContentsSerial Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Default Parameters . . . .

Appendix B: Specifications

46Appendix B: SpecificationsTable B-1 through Table B-5 provide the V102’s GPS sensor, communication, power, mechanical, and environmental specificati

V102 GPS Compass User Guide47Heading fix < 10 s typical (valid position)Compass safe distance30 cm (11.8 in)4Maximum speed 1,850 kph (999 kts)Maxim

48Appendix B: Specifications1Depends on multipath environment, number of satellites in view, satellite geometry, ionospheric activity, and use of SBAS

49V102 GPS Compass User GuideIndexAalarmwatchdog 35alignment 11automaticSBAS tracking 29tracking 28Ccable See power/data cable 14COGTAU 35, 40command

Index50Oorientation for mounting 9Pparallel mounting 9part numbers 3parts list 3perpendicular mounting 9pitch time constant 34pole mount 18powerconnec

End User License AgreementIMPORTANT - This is an agreement (the "Agreement") between you, the end purchaser ("Licensee") and Hemis

estimate of achievable accuracy based on specifications provided by the US Department of Defense for GPS positioning and DGPS service provider perform

the 30 days. Any such termination by a party shall be in addition to and without prejudice to such rights and remedies as may be available, including

Warranty NoticeCOVERED PRODUCTS: This warranty covers all products manufactured by Hemisphere GPS and purchased by the end purchaser (the "Produc

Chapter 1: IntroductionOverviewParts List

www.hemispheregps.com

2Chapter 1: IntroductionOverviewThe V102™ GPS Compass is based upon Hemisphere GPS’ exclusive Crescent® and Crescent Vector™ II technologyThe V102 is

V102 GPS Compass User Guide3quality. The V102 is less likely to be affected by differential signal outages due to signal blockages, weak signals, or i