Garmin GPS 100 Installation Manual

The Garmin GPS 100 is a compact, high-performance GPS receiver designed for marine, aviation, and general navigation applications. It features a rugged, waterproof design, high-sensitivity GPS receiver, NMEA 0183 output, and easy integration with various navigation systems. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

Features at a Glance

Key components: High-sensitivity GPS receiver, Waterproof housing, Power/data cable, Mounting bracket, Status LED.

Installation

Unpack and inspect contents. Choose suitable location with clear view of sky.

1. Select Mounting Location: Ensure clear view of sky, away from obstructions and interference sources.
2. Prepare Mounting Surface: Clean and dry surface. Use template (if provided) to mark hole locations.
3. Mount Unit: Secure using provided screws and hardware. Ensure unit is level and secure.
4. Route Cables: Route power/data cable to power source and connected device. Use cable ties as needed.
5. Connect Power: Connect red wire to positive (+) DC source, black wire to negative (-) ground.
6. Connect Data: Connect NMEA output wires to compatible chartplotter, autopilot, or other NMEA device.

WARNING! Ensure power is OFF during installation. Use appropriate marine-grade wiring and connectors. Seal cable entries to prevent water ingress.

First-Time Setup

Apply power; verify operation and GPS fix.

1. Power On: Apply 10-32 VDC power. Status LED will illuminate.
2. GPS Acquisition: Place unit with clear sky view. Allow up to 5 minutes for first fix (cold start).
3. Verify Fix: Solid green LED indicates 3D GPS fix. Blinking green indicates 2D fix or acquiring.
4. Configure NMEA Output: Default output is 4800 baud, NMEA 0183. Verify compatibility with connected device.
5. Test Data Output: Use compatible device to verify reception of NMEA sentences.

CAUTION! Do not apply power until all connections are secure and checked. Ensure polarity is correct.

Specifications

• GPS Receiver: 12-channel, high-sensitivity, WAAS/EGNOS capable.
• Update Rate: 1 Hz standard.
• Accuracy: Position: <3 meters (10 ft) RMS with WAAS/EGNOS; Velocity: 0.1 knot RMS.
• Acquisition Times: Cold start: <45 sec (typical); Warm start: <15 sec; Hot start: <1 sec.
• Dynamics: Altitude: 18,000 m (60,000 ft) max; Velocity: 515 m/sec (1000 knots) max.
• Interfaces: NMEA 0183 v3.01, RS-232 (via cable).
• Power: 10-32 VDC, 0.15 A typical at 12 VDC.
• Environmental: IPX7 waterproof, operating temp -15°C to 70°C.
• Compliance: FCC, CE, RoHS compliant.

Controls and Connections

Unit has no physical controls; all status indicated via LED. Connections via 6-pin power/data cable.

Cable Pinout: (viewed from rear of connector, pins facing you)

Status LED: Off = No power; Solid Red = Power on, no fix; Blinking Green = Acquiring satellites/2D fix; Solid Green = 3D GPS fix.

Connecting to Navigation Systems

Connect NMEA output to compatible chartplotter, autopilot, radar, or other NMEA 0183 device.

1. Identify NMEA Input on Device: Locate NMEA 0183 input terminals (typically labeled NMEA In+, NMEA In-, Data+, Data-, etc.).
2. Wire Connection: Connect GPS 100 Brown wire (Tx+) to device's NMEA In+ (or Data+). Connect GPS 100 Blue wire (Tx-) to device's NMEA In- (or Data-).
3. Ground Sharing: Ensure both devices share a common ground (connect black wire to device ground if needed).
4. Verify Baud Rate: Ensure connected device is set to 4800 baud to match GPS 100 default.

Tip: Refer to your navigation device's manual for specific NMEA connection details. Use shielded cable for long runs.

Operation and Configuration

Unit operates automatically upon power application. Configuration is limited to external device settings.

1. Power On: Unit begins satellite acquisition automatically.
2. Monitor Status LED: Verify solid green for 3D fix.
3. Data Output: NMEA sentences are transmitted continuously once fix is acquired.
4. Configuration via Connected Device: Use your chartplotter or navigation software to select which NMEA sentences to use and configure datum, units, etc.
5. No User Configuration on Unit: The GPS 100 itself has no user-accessible configuration menus or buttons.

WARNING! Do not attempt to open the housing. No user-serviceable parts inside.

NMEA 0183 Output

Default output: 4800 baud, 8 data bits, 1 stop bit, no parity. Sentences transmitted include GGA, GSA, GSV, RMC, VTG. Provides position, time, date, speed, course, satellite data, and fix quality.

Care & Maintenance

Periodically inspect unit, cable, and connections for damage or corrosion. Clean exterior with mild soap, water, and soft cloth. Ensure cable glands/seals are intact.

CAUTION! Do not use harsh chemicals, solvents, or high-pressure water. Do not paint the unit.

Regulatory Information

FCC Compliance: This device complies with part 15 of the FCC Rules. Operation is subject to the condition that this device does not cause harmful interference. CE Compliance: Meets applicable EU directives. Copyright © Garmin Ltd. or its subsidiaries. Garmin® and the Garmin logo are trademarks of Garmin Ltd. or its subsidiaries. For support, visit www.garmin.com/support or contact your local Garmin dealer.

Troubleshooting

Reset: Cycle power (turn off for 10 seconds, then restart).

Service: For persistent issues, contact Garmin Product Support or authorized service center. Do not disassemble.