Garmin GPS 15L Technical Specifications
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Garmin GPS 15L Technical Specifications

Garmin GPS 15L Technical Specifications

Garmin gps 15l: technical spec
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GPS 15H & 15L
TECHNICAL

SPECIFICATIONS

®
Garmin International, Inc.
st
1200 E. 151
Street
Olathe, KS 66062 USA
190-00266-01, Revision D
February 2006

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  • Page 1: Specifications

    GPS 15H & 15L TECHNICAL SPECIFICATIONS ® Garmin International, Inc. 1200 E. 151 Street Olathe, KS 66062 USA 190-00266-01, Revision D February 2006...
  • Page 2 Information in this document is subject to change without notice. Garmin reserves the right to change or improve its products and to make changes in the content without obligation to notify any person or organization of such changes or improvements.

  • Page 3: Table Of Contents

    1.5.5.4 PPS ... 6 1.5.6 Antenna Specifications... 6 2 GPS 15H & 15L Wire Descriptions and Wiring Diagrams ...8 2.1 GPS 15H & 15L Wire Descriptions ...8 2.2 GPS 15H & 15L Wiring Diagrams ...9 3 Mechanical Characteristics & Mounting...10 4 GPS 15H &...
  • Page 4 Satellite Data Record ...24 Position Record ...26 Receiver Measurement Record ...26 Sample C Code ...27 Appendix C: Changing the Baud Rate in Garmin Mode...28 Appendix D: Ephemeris Data Download (Programming Example)...29 Synopsis ...29 Garmin Binary Format Review ...29 Ephemeris Download Procedure ...30 TX Packet: Ephemeris Data Request ...30...

  • Page 5: Introduction

    NAVAIDs, visual sightings, charts, etc. For safety, always resolve any discrepancies before continuing navigation. The GPS 15H & 15L sensors comply with Part 15 of the FCC interference limits for Class B digital devices FOR HOME OR OFFICE USE. These limits are designed to provide reasonable protection against harmful interference in a residential installation, and are more stringent than “outdoor”...

  • Page 6: Limited Warranty

    Garmin retains the exclusive right to repair or replace the unit or software or offer a full refund of the purchase price at its sole discretion. SUCH REMEDY SHALL BE YOUR SOLE AND EXCLUSIVE REMEDY FOR ANY BREACH OF WARRANTY.

  • Page 7: Overview

    OEM (Original Equipment Manufacture) system applications. Based on the proven technology found in other Garmin 12-channel GPS receivers, the GPS 15H & 15L track up to 12 satellites at a time while providing fast time-to-first-fix, one-second navigation updates, and low power consumption. The GPS 15H &...

  • Page 8: Technical Specifications

    The GPS 15H & 15L sensors provide a MCX female connector for connection to an active GPS antenna, so the antenna’s cable should be terminated in MCX male. A suitable antenna is Garmin’s GA 27C Antenna (Garmin Part Number 010-10052-05). Other antennas that are terminated in male BNC connectors may be adapted via a Garmin MCX to BNC Adapter Cable (Garmin Part Number 010-10121-00).

  • Page 9: Gps Performance

    1.5.4 GPS Performance 1.5.4.1 Receiver WAAS Enabled™, 12 parallel channel GPS receiver continuously tracks and uses up to 12 satellites (up to 11 with PPS active) to compute and update your position. 1.5.4.2 Acquisition Times • Reacquisition: Less than 2 seconds •...

  • Page 10: Interfaces

    GPS 27C (Garmin Part Number 010-10052-05) provides the required MCX Male connector. Other Garmin antennas terminated in a BNC Male connector may also be used if a Garmin MCX to BNC Adapter Cable (Garmin Part Number 010-10121-00) is used. Place the MCX to BNC Adapter Cable between the connector on the end of the antenna cable and the connector on the GPS 15H &...
  • Page 11 GPS 15L supplies 3.0 VDC to the center conductor of the MCX female, relative to the connector shell ground In both the GPS 15H and 15L, the source resistance of the DC supply to the center conductor of the connector is approximately 10 Ohms, which is included as a current limiting resistance.

  • Page 12: Gps 15H & 15L Wire Descriptions And Wiring Diagrams

    GROUND Power and Signal Ground POWER GPS 15L: +3.3 to +5.4 VDC (±100 mV ripple) input. Peak operating current is 100 mA. Nominal operating current is 85 mA. This voltage drives an LDO with a nominal 3.0 VDC output. GPS 15H: Unregulated 8.0 to 40 VDC input. Peak operating current is 40 mA @ 12 VDC input.

  • Page 13: Gps 15H & 15L Wiring Diagrams

    2.2 GPS 15H & 15L WIRING DIAGRAMS Figure 1: Computer Serial Port Interconnection Figure 2: PDA Serial Port Interconnection Figure 3: Basic NMEA Device Interconnection 190-00266-01 GPS 15H & 15L Technical Specifications Rev. D Page 9...

  • Page 14: Mechanical Characteristics & Mounting

    2. Dimension tolerance: +/-0.25 mm [±0.01”] 3. Use M2 mounting screws Figure 4: GPS 15H-F & 15L-F Dimensions 1. Dimensions identical to GPS 15H-F and GPS 15L-F 2. Use M2 mounting screws Figure 5: GPS 15H-W & 15L-W Outline Drawing 190-00266-01 GPS 15H &...

  • Page 15: Gps 15H & 15L Software Interface

    NMEA 0183 sentences. The characters “$P” indicate that the sentence is a proprietary implementation and the characters and the characters “GRM” indicate that it is Garmin’s proprietary sentence. The letter (or letters) that follow the characters “$PGRM” uniquely identifies that particular Garmin proprietary sentence.

  • Page 16: Sensor Initialization Information

    The $PGRMI sentence provides information used to initialize the GPS sensor’s set position and time used for satellite acquisition. Receipt of this sentence by the GPS sensor causes the software to restart the satellite acquisition process. If there are no errors in the sentence, it is echoed upon receipt. If an error is detected, the echoed PGRMI sentence will contain the current default values.

  • Page 17: Additional Sensor Configuration Information (Pgrmc1)

    NMEA 0183 sentence transmission is suspended temporarily. 5. $PGRMO,,G causes the COM 1 port to change to Garmin Data Transfer format for the duration of the power cycle. The Garmin mode is required for GPS 15H & 15L product software updates.

  • Page 18: Tune Dgps Beacon Receiver (Pslib)

    4.1.6 Tune DGPS Beacon Receiver (PSLIB) The $PSLIB sentence provides the ability to tune a Garmin GBR 21, GBR 23 or equivalent beacon receiver. $PSLIB,<1>,<2>*hh<CR><LF> <1> Beacon tune frequency, 0.0, 283.5–325.0 kHz in 0.5 kHz steps <2> Beacon bit rate, 0, 25, 50, 100, or 200 bps If valid data is received, the GPS sensor stores it in the EEPROM and echoes the PSLIB command to the beacon receiver.

  • Page 19: Transmitted Nmea 0183 Sentences

    4.2 TRANSMITTED NMEA 0183 SENTENCES The subsequent paragraphs define the sentences that can be transmitted on COM 1 by the GPS sensor. 4.2.1 Sentence Transmission Rate Sentences are transmitted with respect to the user-selected baud rate. Regardless of the selected baud rate, the information transmitted by the GPS sensor is referenced to the one-pulse-per-second output pulse immediately preceding the GPRMC sentence, or whichever sentence is output first in the burst (see Table 3 below).

  • Page 20: Transmitted Time

    If a negative leap second should be required, one second is deleted at the end of some UTC month. The minute containing the leap second will be only 59 seconds long. In this case, the GPS sensor will not transmit the time of day 0h 0m 0s (the “zero” second) for the day from which the leap second is removed.

  • Page 21: Gps Dop And Active Satellites (Gsa)

    4.2.5 GPS DOP and Active Satellites (GSA) $GPGSA,<1>,<2>,<3>,<3>,<3>,<3>,<3>,<3>,<3>,<3>,<3>,<3>,<3>,<3>,<4>,<5>,<6>*hh<CR><LF> <1> Mode, M = manual, A = automatic <2> Fix type, 1 = not available, 2 = 2D, 3 = 3D <3> PRN number, 01 to 32, of satellite used in solution, up to 12 transmitted (leading zeros are transmitted) <4>...

  • Page 22: Geographic Position (Gll)

    Time dilution of precision, 0 to 9 (rounded to nearest integer value) 4.2.12 Map Datum (PGRMM) The Garmin Proprietary sentence $PGRMM gives the name of the map datum currently in use by the GPS sensor. This information is used by the Garmin MapSource® real-time plotting application.

  • Page 23: Sensor Status Information

    4.2.13 Sensor Status Information (PGRMT) The Garmin Proprietary sentence $PGRMT gives information concerning the status of the GPS sensor. This sentence is transmitted once per minute regardless of the selected baud rate. $PGRMT,<1>,<2>,<3>,<4>,<5>,<6>,<7>,<8>,<9>*hh<CR><LF> <1> Product, model and software version (variable length field, e.g., “GPS 15H & 15L VER 2.05”)

  • Page 24: Baud Rate Selection

    GPS (DGPS) real-time pseudo-range correction data in RTCM SC-104 format, with message types 1, 2, 3, 7, and 9. These corrections can be received by the GPS 15H & 15L on COM 2. The RTCM data must be received at the same baud rate as the COM 1 port. For details on the SC-104 format, refer to RTCM Paper 134-89/SC 104-68 by the Radio Technical Commission for Maritime Services.

  • Page 25: Appendix A: Earth Datums

    APPENDIX A: EARTH DATUMS The following is a list of the Garmin GPS 15H & 15L Earth datum indices and the corresponding earth datum name (including the area of application): ADINDAN - Ethiopia, Mali, Senegal, Sudan AFGOOYE - Somalia AIN EL ABD 1970 - Bahrain Island, Saudi Arabia...
  • Page 26 NAHRWAN - Saudi Arabia NAHRWAN - United Arab Emirates OBSERVATORIO 1966 - Corvo and Flores Islands (Azores) OLD EGYPTIAN - Egypt OLD HAWAIIAN - Mean Value OMAN - Oman 190-00266-01 GPS 15H & 15L Technical Specifications Page 22 Rev. D...
  • Page 27 WORLD GEODETIC SYSTEM 1984 ZANDERIJ - Surinam CH-1903 - Switzerland Hu - Tzu - Shan Indonesia 74 Austria Potsdam Taiwan - modified Hu-Tzu-Shan GDA - Geocentric Datum of Australia Dutch 190-00266-01 GPS 15H & 15L Technical Specifications Page 23 Rev. D...

  • Page 28: Appendix B: Binary Phase Output Format

    Software Interface. (Refer to the Garmin GPS Interface Specification for details on how to form and parse Garmin packets. At the time of this printing, these specs are available from the technical support section of our Web site: http://www.garmin.com/support/commProtocol.html.) Note: The satellite data information is also enabled when the position record is enabled.
  • Page 29 - 0x## (2’s complement of the arithmetic sum of the bytes between the delimiters) - 0x10 (DLE) - 0x03 (ETX is last byte) 190-00266-01 GPS 15H & 15L Technical Specifications Meaning when bit is one (1) Page 25 Rev. D...

  • Page 30: Position Record

    Latitude velocity (meters/second) alt_vel Altitude velocity (meters/second) msl_hght Mean sea level height (meters) leap_sec UTC leap seconds grmn_days Garmin days (days since December 31, 1989) Receiver Measurement Record typedef struct unsigned long cycles; double unsigned int phase; char slp_dtct;...

  • Page 31: Sample C Code

    ] = data; else if ( rx_state == ETX ) if ( data == DLE_BYTE ) rx_state = DLE; if ( in_que_ptr > 255 ) in_que_ptr = 0; 190-00266-01 GPS 15H & 15L Technical Specifications Page 27 Rev. D...

  • Page 32: Appendix C: Changing The Baud Rate In Garmin Mode

    APPENDIX C: CHANGING THE BAUD RATE IN GARMIN MODE In certain cases, you may need to change the default baud rate of your Garmin GPS receiver while in Garmin mode. Follow these steps to temporarily change the baud rate. Refer to the Garmin Device Interface Specification for details on how to form and parse Garmin packets.

  • Page 33: Appendix D: Ephemeris Data Download (Programming Example)

    17 or 18 family GPS unit with the exception of the GPS 15-W and the GPS 15-F. Garmin Binary Format Review In order to download the ephemeris data, you must first command the unit to output information in Garmin Binary Format (Garmin mode) instead of the default NMEA output format. To put the unit in Garmin mode, connect to the unit using a terminal program and send the following NMEA sentence: $PGRMO,,G*hh<CR><LF>...

  • Page 34: Ephemeris Download Procedure

    TX Packet: Acknowledgement Byte Description Delimiter Record ID Number of bytes in data ID of packet being ACK’d Checksum calculation Delimiter End of packet 190-00266-01 GPS 15H & 15L Technical Specifications Name HEX Value 0x10 IOP_CMND_DATA 0x0A SIZE 0x02 IOP_DOWN_LOAD_EPH 0x5D...

  • Page 35: Rx Packet: Ephemeris Data

    /* inclination correction, cosine float crs; /* radius correction, sine float crc; /* radius correction, cosine unsigned char iod; /* issue of data } SDM_spc_eph_type; 190-00266-01 GPS 15H & 15L Technical Specifications Name HEX Value 0x10 IOP_SPC_EPH_DATA 0x35 SIZE 0x78 DATA ---- CHKSUM...
  • Page 36 This function merely swaps the upper and lower words of the double. This is necessary on GPS 15, 16, 17 series sensors due to a compatibility issue with the IEEE floating point standard): In this example, the array m_TempArray contains the data portion of the ephemeris packet (with DLE stuffing removed).

  • Page 37: Tx Packet: Download Complete

    Number of bytes in data Ephemeris Download ID Checksum calculation Delimiter End of packet After properly acknowledging this packet (ACK the IOP_DL_CMPLT ID), the ephemeris download is complete. 190-00266-01 GPS 15H & 15L Technical Specifications Name HEX Value 0x10 IOP_DL_CMPLT 0x0c SIZE 0x02...

  • Page 38: Appendix E: Declaration Of Conformity

    APPENDIX E: DECLARATION OF CONFORMITY Hereby, Garmin Ltd., declares that this GPS 15H/15L is in compliance with the essential requirements and other relevant provisions of Directive 1999/5/EC. For the latest free software updates (excluding map data) throughout the life of your Garmin products, visit the Garmin Web site at www.garmin.com.

This manual is also suitable for:

Gps 15h15h-w - gps, gps waas enabled sensor

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