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Hemisphere GPS Crescent A100 User Manual

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C
N
OPYRIGHT
Hemisphere GPS (Satloc LLC) Precision GPS Applications
© Copyright Hemisphere GPS (Satloc LLC) (2006). All rights reserved.
No part of this manual may be reproduced, transmitted, transcribed, stored in a retrieval
system or translated into any language or computer language, in any form or by any
means, electronic, mechanical, magnetic, optical, chemical, manual or otherwise, without
the prior written permission of Hemisphere GPS (Satloc LLC).
T
RADEMARKS
Hemisphere GPS and the Hemisphere GPS logo, Satloc and the Satloc logo, and CSI
Wireless and the CSI Wireless logo are trademarks of Hemisphere GPS (Satloc LLC), CSI
Wireless, Inc. and CSI Wireless LLC. Other trademarks are the properties of their
respective owners.
N
C
OTICE TO
Contact your local dealer for technical assistance. To find the authorized dealer near you,
call or write us at:
Hemishpere GPS
7650 E. Redfield Road, Suite B
Scottsdale, AZ 85260
OTICE
USTOMERS
Telephone number:
Fax number:
E-mail address:
(480) 348-9919
(480) 348-6370
sales@satloc.com

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Summary of Contents for Hemisphere GPS Crescent A100

  • Page 1 Hemisphere GPS (Satloc LLC). RADEMARKS Hemisphere GPS and the Hemisphere GPS logo, Satloc and the Satloc logo, and CSI Wireless and the CSI Wireless logo are trademarks of Hemisphere GPS (Satloc LLC), CSI Wireless, Inc. and CSI Wireless LLC. Other trademarks are the properties of their respective owners.

  • Page 2: Table Of Contents

    Mounting the Crescent A100 ........10...
  • Page 3 B: Specifications ..........26 D: Crescent A100 Accessories ........30 E: Surface Mount Template .

  • Page 4: 1: Installation

    1: I NSTALLATION Features Installation Mounting the Crescent A100 Powering the Crescent A100 Connecting Crescent A100 to External Devices...

  • Page 5: Introduction

    1: Installation NTRODUCTION Congratulations on buying Hemisphere GPS’ new Crescent A100. The Crescent A100 is a smart antenna that tracks GPS and SBAS (WAAS and EGNOS) signals. The Crescent A100 provides sub- meter performance with50 centimeter accuracy 95% of the time.

  • Page 6: Features

    Green indicates a DGPS solution Radar-Simulated Pulse Output The radar-simulated pulse output provides accurate ground speed. The Crescent A100 uses pin 12 for the speed out pin. Pin 12 will output a square wave with a 50% duty cycle. The frequency of the...

  • Page 7: Can

    The Crescent A100 features Controller Area Network (CAN) to handle communication between CAN-based devices. The Crescent A100 supports a selection of NMEA 2000 messages that can be broadcast on a CAN bus. Table 1-1 provides a listing of the NMEA 2000 commands that are used.

  • Page 8: Installation

    Crescent A100 User Guide NSTALLATION The Crescent A100 is a smart antenna that tracks GPS and SBAS (WAAS and EGNOS). It utilizes Hemisphere GPS’ exclusive COAST technology during differential outages. The Crescent ™ ® ® A100 is also capable of using Hemisphere GPS’ e-Dif and L-Dif technology.

  • Page 9: Cable Interface

    Power Additional extension cables may be purchased, as necessary, for other installations. This allows the Crescent A100 to be quickly and easily moved form one installation to another. If an extension cable is damaged in the field, it can be replaced without returning the complete Crescent A100 system.

  • Page 10: Extension Power/Data Cable

    Crescent A100 User Guide Extension Power/Data Cable The Crescent A100 system is quickly installed with one of the various extension cables. The location of the extension cable should be made with the following requirements in mind: • Power leads at the “Y” end must reach a power source.
  • Page 11 GPS satellites are not masked by obstructions, which can potentially reduce system performance. To place the Crescent A100: Mount the Crescent A100 on, or as close to, the center of your point of measurement. Position the Crescent A100 as high as possible.
  • Page 12 Crescent A100 User Guide Figure 1-2. Crescent A100 placement on a vehicle...

  • Page 13: Mounting The Crescent A100

    Magnetic Mount The magnetic mount can be screwed into the bottom of the Crescent A100 and mounts to metal surfaces. A metal disc and foam adhesive are included with each magnetic mount. Use the foam adhesive to bond the metal disc to the desired mounting location if there are no metal surfaces.

  • Page 14: Surface Mount

    Crescent A100 User Guide Place the Crescent A100 on top of the metal disc. (See Figure 1-3 for the magnetic mounted Crescent A100.) Figure 1-3. Magnetic mounted Crescent A100 Surface Mount As an alternative to the magnetic mount, the Crescent A100 is easily attached to the surface with four machine screws (no.

  • Page 15: Pole Mount

    Warning: Install the Crescent A100 only hand-tight. Damage resulting from overtightening the Crescent A100 is not covered by warranty. Pole Mount The center thread of the Crescent A100 is 5/8 inches for compatibility with a survey pole (not included).

  • Page 16: Powering The Crescent A100

    Be careful not to provide a voltage higher than the input range. This will damage the antenna. The Crescent A100 accepts an input voltage between 7 and 36 VDC via the cable. For best performance, the supplied power should be continuous and clean. Refer to Table B-1: Power specifications in the Appendix for power requirements.
  • Page 17 This may vary depending where you are in the world. Note: The Crescent A100 can take up to five minutes for a full ionoshperic map to be received from SBAS. Optimum accuracy will be obtained once the Crescent A100 is processing corrected positions using complete ionospheric information.

  • Page 18: Connecting The Crescent A100 To External Devices

    The serial ports are also used for firmware updates. Note: For successful communication, the baud rate of the Crescent A100 serial ports must be set to match that of the devices to which they are connected. Figure 1-4 displays the numbering for the extension cable’s DB-9 socket connector (female).

  • Page 19: Factory Parameters

    Transmit Crescent A100 NMEA 0183, binary and RTCM Receive Crescent A100 NMEA 0183, binary and RTCM input Signal ground Factory parameters Tables 1-4 to 1-6 identify the default Crescent A100 configuration. Table 1-4: DGPS Application 1 SBAS (WAAS, EGNOS, etc.) Application 2 e-Dif (unsubscribed)

  • Page 20: Custom Configuring The Crescent A

    10 Hz receiver) Custom Configuring the Crescent A100 All aspects of the Crescent A100 may be configured through the serial port with the use of Hemisphere GPS commands. The user can configure the following items: •...

  • Page 21: Environmental Considerations

    1: Installation Environmental Considerations The Crescent A100 is designed to withstand various outdoor environments. However, there are specific environmental limits that you should meet when storing and using the Crescent A100. See Table B-4: Environmental specifications in Appendix B.

  • Page 22: 2: Gps Overview

    2: GPS O VERVIEW GPS Operation Differential Operation...

  • Page 23: Gps Overview

    This is a hands-free mode of operation. Receiver Performance The Crescent A100 works by finding four or more GPS satellites in the visible sky and uses the information those satellites provide to compute an appropriate position (typically within 2-3 meters).

  • Page 24: Differential Operation

    Space Based Augmentation Systems (SBAS), such as the Wide Area Augmentation System (WAAS) and the European Geo-stationary Navigation Overlay System (EGNOS). The Crescent A100 is compatible with each of these differential services in addition to Hemisphere GPS’ patented e-Dif. SBAS...
  • Page 25 SBAS signal when in an area where signal blockage of a satellite is possible. e-Dif A Crescent A100 that is equipped with Hemisphere GPS’ e-Dif capabilities can operate anywhere in the world where normal GPS signals can be viewed. e-Dif can be used anywhere on the globe where a GPS lock can be achieved.
  • Page 26 Crescent A100 to maintain absolute accuracy (typically less than 1 meter over 40 minutes.)

  • Page 27: Appendix

    PPENDIX Troubleshooting Crescent A100 Specifications Network Crescent A100 accessories Surface mount template...

  • Page 28: A: Troubleshooting

    Appendix A: Troubleshooting Table A-1 provides a checklist to troubleshoot common problems and their solutions for the Crescent A100. Table A-1: Troubleshooting Problem Possible solution Receiver fails to • Verify polarity of power leads power • Check integrity of power cable connections •...
  • Page 29 Crescent A100 Table A-1: Troubleshooting Problem Possible solution No SBAS lock • Check integrity of cable connections • Verify Crescent A100’s unobstructed view of the sky • Check SBAS visibility map...

  • Page 30: B: Specifications

    Appendix B: Specifications Table B-1 to B-5 provides the power, mechanical, communication, environmental and DGPS specifications for the Crescent A100. Table B-1: Power specifications Item Specification Input voltage 7 - 36 VDC Power consumption < 2 W @ 12 VDC (typical)
  • Page 31 Crescent A100 Table B-3: Communication specifications Item Description Serial ports 2 full duplex RS232 NMEA 2000 broadcast Pulse output 1 PPS (HCMOS, active high, rising edge sync) Baud rates 4800 - 57600 Differential correction RTCM SC-104 I/O protocol Data I/O protocol...
  • Page 32 Appendix Table B-4: Environmental specifications Item Specification Humidity 100% Enclosure Waterproof and dust proof Compliance FCC, CE Shock IEC 68-2-27 Vibration ISO 16750-1 EMI certification FCC part 15, E-Mark Table B-5: GPS sensor specifications Item Specification Receiver type L1, C/A code with carrier phase smoothing (Patented COAST technology during differential signal outage)

  • Page 33: D: Crescent A100 Accessories

    Crescent A100 * Depends on multipath environment, number of satellites in view, satellite geometry, baseline length (for local services) and ionspheric activity **Depends on multipath environment, number of satellites in view, satellite geometry and ionspheric activity...
  • Page 34 Tables D-1 to D-4 provides the available accessories for the Crescent A100. Table D-1: Crescent A100 Part Number Item 804-0032 Crescent A100 receiver Table D-2: Crescent A100 documentation accessories Part Number Documentation 875-0163 Crescent A100 owner’s manual 875-0066 Warranty Table D-3: Crescent A100 cable accessories...
  • Page 35 Crescent A100 Table D-3: Crescent A100 cable accessories Part Number Cables 051-0134 Cable adaptor converts 051-0132 guidance console port to a console port and speed port 051-0136 Cable adaptor converts 051-0132 guidance console port to DB9 and speed port 054-0035...
  • Page 36 Appendix This page is intentionally left blank...

  • Page 37: E: Surface Mount Template

    Crescent A100 E: Surface Mount Template The following template should be used to plan for the location of the mounting holes used when surface mounting the Crescent A100.

  • Page 38: Index

    Crescent A100 User Guide Index Cable Interface 6 CAN 4 Crescent A100 Placement 7–9 Custom Configuring the Crescent A100 17 DB-9 socket 15 Deutsche connector 5–6 Differential Operation 21–22 e-Dif 22 EGNOS 22 Environmental Considerations 18 Extension Power/Data Cable 7 Factory parameters 16 GPS Operation 20–21...

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