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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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© Copyright 2004–2006 Garmin Ltd. or its subsidiaries Garmin International, Inc. st 1200 East 151 Street, Olathe, Kansas 66062, U.S.A. Tel. 913/397.8200 or 800/800.1020 Fax 913/397.8282 Garmin (Europe) Ltd. Unit 5, The Quadrangle, Abbey Park Industrial Estate, Romsey, SO51 9DL, U.K. Tel. 44/0870.8501241 Fax 44/0870.8501251 Garmin Corporation nd No. 68, Jangshu 2 Road, Shijr, Taipei County, Taiwan Tel. 886/2.2642.9199 Fax 886/2.2642.9099 All rights reserved. Except as expressly prov
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TABLE OF CONTENTS 1 Introduction..................................................................................................................1 1.1 Cautions ............................................................................................................................................1 1.2 Limited Warranty..............................................................................................................................2 1.3 Overview.................................
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4.2.12 Map Datum (PGRMM) ........................................................................................................................18 4.2.13 Sensor Status Information (PGRMT)...................................................................................................19 4.2.14 3D velocity Information (PGRMV) .....................................................................................................19 4.2.15 DGPS Beacon Information (PGRMB) .........................
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1 INTRODUCTION 1.1 CAUTIONS Caution The GPS system is operated by the government of the United States, which is solely responsible for its accuracy and maintenance. Although the GPS 15H & 15L sensors are precision electronic NAVigation AIDs (NAVAID), any NAVAID can be misused or misinterpreted, and therefore become unsafe. Use these products at your own risk. To reduce the risk, carefully review and understand all aspects of these Technical Specifications before using the GPS 15H & 15L.
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1.2 LIMITED WARRANTY This Garmin product is warranted to be free from defects in materials or workmanship for one year from the date of purchase. Within this period, Garmin will at its sole option repair or replace any components that fail in normal use. Such repairs or replacement will be made at no charge to the customer for parts or labor, provided that the customer shall be responsible for any transportation cost. This warranty does not cover failures due to abuse, misuse, accident, or
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1.3 OVERVIEW The GPS 15H & 15L are part of Garmin’s latest generation of GPS sensor boards designed for a broad spectrum of 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 & 15L also provide the capability of FAA Wide Area Augmentation System
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1.5 TECHNICAL SPECIFICATIONS Specifications are subject to change without notice. 1.5.1 Physical Characteristics 1.5.1.1 Size 1.400” (35.56 mm) wide x 1.805” (45.85 mm) long x 0.327” (8.31 mm) high 1.5.1.2 Weight • GPS 15H: 0.53 oz. (15.0 g) • GPS 15L: 0.50 oz (14.1 g) 1.5.1.3 Available Connector Options • GPS 15H-F & 15L-F: 8-pin LIF (Low Insertion Force) flex connector, 1-millimeter pitch. For use with common 1 mm pitch, 8-conductor flex cable, available as Garmin Part Number 310-00
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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 • Warm: Approx. 15 seconds (all data known) • Cold: Approx. 45 seconds (initial position, time, and almanac known; ephemeris unknown) • AutoLocate®: 5 minutes (almanac known; initial position and time unknown) • SkySearch: 5 mi
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1.5.5 Interfaces 1.5.5.1 GPS 15H & 15L Electrical Characteristics • True RS-232 output (Port 2 output not used at time of publication), asynchronous serial input compatible with RS-232 or TTL voltage levels, RS-232 polarity. • User selectable NMEA 0183 baud rate (300, 600, 1200, 2400, 4800, 9600, 19200, 38400). Factory setting is 4800 baud. 1.5.5.2 Port 1 Protocols • Configurable between NMEA 0183 Versions 2.00 and 3.00. • ASCII output sentences: GPALM, GPGGA, GPGLL, GPGSA, GPGSV, GPRMC,
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Noise Figure/Gain: The total noise figure on the external antenna must be ≤ 7 dB. Refer to the table below. 18.0 17.0 16.0 15.0 14.0 13.0 12.0 11.0 10.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0 Gain (dB) NF=1.3dB NF=2.3dB NF=3.3dB NF=4.3dB NF=5.3dB NF=6.3dB NF=7.3dB Table 1: Gain vs. SNR for Given Noise Figure Properly bias the antenna from an on-board source or an external source: Bias voltage from on-board source: GPS 15H supplies 3.3 VDC to the center conductor of the MCX female, relative
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2 GPS 15H & 15L WIRE DESCRIPTIONS AND WIRING DIAGRAMS The GPS 15H-F & 15L-F use an eight-contact flex circuit LIF (low insertion force) connector. The GPS 15H-W & 15L-W use an eight-pin JST connector (mating wire harness included). See section 1.5.1.3. 2.1 GPS 15H & 15L WIRE DESCRIPTIONS Pin # Signal Name Description 1 BACKUP This input provides external power to maintain the real-time clock. This enables POWER the user to provide backup power if needed for longer than the on-board backup
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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
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3 MECHANICAL CHARACTERISTICS & MOUNTING 1. Dimensions in millimeters [inches] 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 & 15L Technical Specifications Rev. D Page 10
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4 GPS 15H & 15L SOFTWARE INTERFACE The GPS 15H & 15L interface protocol design on COM 1 is based on the National Marine Electronics Association’s NMEA 0183 ASCII interface specification. The COM 2 port can receive differential GPS (DGPS) correction data using the Radio Technical Commission for Maritime Services’ RTCM SC-104 standard. These standards are fully defined in NMEA 0183, Version 3.0 (copies may be obtained from NMEA, www.nmea.org) and RTCM Recommended Standards For Differential Na
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4.1.2 Sensor Initialization Information (PGRMI) 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. Current PGRMI defaults (with the exception of th
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4.1.4 Additional Sensor Configuration Information (PGRMC1) The $PGRMC1 sentence provides additional information used to configure the GPS sensor operation. Configuration parameters are stored in non-volatile memory and retained between power cycles. The GPS sensor echoes this sentence upon its receipt if no errors are detected. If an error is detected, the echoed PGRMC1 sentence will contain the current default values. Current default values can also be obtained by sending $PGRMC1E to the G
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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 <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. If the GPS sensor is using any stored beacon frequency other than 0.0, it will tune the be
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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). T
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4.2.2 Transmitted Time The GPS sensor outputs UTC (Coordinated Universal Time) date and time of day in the transmitted sentences. Before the initial position fix, the on-board clock provides the date and time of day. After the initial position fix, the date and time of day are calculated using GPS satellite information and are synchronized with the one-pulse-per-second output. The GPS sensor uses information obtained from the GPS satellites to add or delete UTC leap seconds and correct the
