SkyTraq PX1100S - User Manual

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SkyTraq Technology, Inc. Preliminary Draft www.skytraq.com.tw

Features

⚫ 230 acquisition/tracking channels

⚫ Support global GPS, Beidou, Galileo, GLONASS

⚫ Supports regional QZSS, SBAS

⚫ 16 million time-frequency hypothesis testing

per sec

⚫ -148dBm cold start sensitivity

⚫ -165dBm tracking sensitivity

⚫ 29 second cold start TTFF

⚫ 3.5 second TTFF with AGPS

⚫ 1 second hot start

⚫ 2.0m CEP accuracy

⚫ Multipath detection and suppression

⚫ Jamming detection and mitigation

⚫ AGPS Support

⚫ Contains LNA, TCXO, RTC Crystal

⚫ Works with active and passive antenna

⚫ On board active antenna short protection

⚫ On board active antenna detection

⚫ Complete receiver in 10.1mm x 9.7mm size

⚫ Operating temperature -40 ~ +85ºC

⚫ Pb-free RoHS compliant

Applications

⚫ Navigation and asset tracking

⚫ Timing reference

L1 Quad Constellation

GNSS Receiver Module

The PX1100S is a satellite navigation receiver capable of

using GPS, Beidou, Galileo, GLONASS, QZSS, SBAS signal to

provide 3D navigation in a single compact SMD module. The

PX1100S can track all in-view GPS, Beidou, Galileo,

GLONASS, QZSS satellites. It is fully autonomous such that

once power is applied, the receiver automatically searches,

acquires and tracks satellite signals. When a sufficient

number of satellites are tracked with valid measurements,

the receiver produces 3D position and velocity outputs.

Global quad-constellation signal receiving capability enables

using greater number of satellite signal than GPS/GLONASS

dual-constellation receivers. The increased satellite number

offers superior performance in challenging urban canyon

and multipath environments.

Single-chip Phoenix positioning engine is inside the receiver

module. It features high sensitivity and fast TTFF. The

PX1100S can acquire, track, and get position fix

autonomously in difficult weak signal environment. Its high

tracking sensitivity allows continuous position coverage in

nearly all outdoor application environments. The high

performance signal parameter search engine is capable of

testing 16 million time-frequency hypotheses per second,

offering superior signal acquisition and TTFF speed.

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Summary

Electrical Specifications

Absolute Maximum Ratings

Specifies the maximum voltage, current, and temperature limits for safe operation of the module.

The PX1100S is an L1 Quad Constellation GNSS Receiver Module designed for satellite navigation applications, offering high-performance signal acquisition and tracking in a compact surface mount package. It supports global GPS, Beidou, Galileo, and GLONASS constellations, as well as regional QZSS and SBAS systems, enabling 3D navigation.

Function Description:

The PX1100S is a fully autonomous receiver that automatically searches, acquires, and tracks satellite signals upon power-up. Once a sufficient number of satellites are tracked with valid measurements, it provides 3D position and velocity outputs. Its global quad-constellation signal receiving capability allows for the use of a greater number of satellites compared to dual-constellation receivers, leading to superior performance in challenging environments like urban canyons and areas with multipath interference.

The module incorporates a single-chip Phoenix positioning engine, which contributes to its high sensitivity and fast Time-To-First-Fix (TTFF). It can acquire, track, and achieve a position fix autonomously even in difficult weak signal conditions. The high tracking sensitivity ensures continuous position coverage in most outdoor applications. The advanced signal parameter search engine can test 16 million time-frequency hypotheses per second, enhancing signal acquisition and TTFF speed.

Important Technical Specifications:

Receiver Type: L1 frequency, 230-channel Phoenix engine
Supported Satellites: GPS, Beidou, Galileo, GLONASS, QZSS
Augmentation System: QZSS, WAAS, EGNOS, MSAS, GAGAN
Accuracy:
- Position: 2.0m CEP
- Velocity: 0.1m/sec
- Time: 10ns
Startup Time (under open sky average):
- Hot Start: 1 second
- Warm Start: 28 seconds
- Cold Start: 29 seconds
- TTFF with AGPS: 3.5 seconds
Reacquisition Time: 1 second
Sensitivity:
- Cold Start: -148dBm
- Re-acquisition: -160dBm
- Tracking: -165dBm
Update Rate: Configurable from 1 Hz (default) up to 25 Hz (1/2/4/5/8/10/20/25 Hz)
Dynamics: 4G (39.2m/sec²)
Operational Limits: Altitude < 80,000m and velocity < 515m/s
Serial Interface: 3.3V LVTTL level
Protocol: NMEA-0183 V4.1, SkyTraq binary, 115200 baud, 8, N, 1
Datum: Default WGS-84, User definable
Input Voltage: 3.3V DC +/-10%
Current Consumption:
- Acquisition: 75mA @ 3.3V
- Tracking: 65mA @ 3.3V
Dimension: 10.1mm (L) x 9.7mm (W) x 2.9mm (H)
Weight: 1g
Operating Temperature: -40°C ~ +85°C
Storage Temperature: -55°C ~ +100°C
Humidity: 5% ~ 95%
Backup Supply (V_BCKP): 1.3V ~ 3.6V. Backup current drain is less than 15µA when VCC is off.
RF Input Impedance: 50 Ohm

Usage Features:

Compact Size: Complete receiver in a 10.1mm x 9.7mm size, making it suitable for space-constrained applications.
Antenna Support: Works with both active and passive antennas. Includes on-board active antenna short protection and active antenna detection.
AGPS Support: Features Server-based AGPS for enhanced TTFF performance.
Multipath Mitigation: Advanced multi-path detection and suppression capabilities improve accuracy in challenging environments.
Jamming Mitigation: Includes jamming detection and mitigation features to maintain performance in the presence of interference.
Integrated Components: Contains LNA (Low Noise Amplifier), TCXO (Temperature Compensated Crystal Oscillator), and RTC (Real-Time Clock) Crystal, simplifying external component requirements.
NMEA-0183 Protocol: Uses the standard NMEA-0183 protocol for easy integration with existing systems, providing position, time, and velocity information.
1PPS Output: Provides a 1-pulse-per-second (1PPS) time mark output (3.3V LVTTL) with a rising edge synchronized to UTC second (accuracy of about 10nsec) when a 3D position fix is achieved.

Maintenance Features:

Backup Supply for Fast Fixes: The V_BCKP pin allows the internal RTC and SRAM to remain powered when the module is off, enabling faster time-to-first-fix upon subsequent power-ups by retaining ephemeris data. If cold starting is not a concern, V_BCKP can be connected to VCC.
Robust Design: Designed to operate across a wide temperature range (-40°C to +85°C) and is Pb-free RoHS compliant.
Layout Guidelines: Recommendations are provided for PCB layout, including separating RF and digital circuits, maintaining 50-ohm impedance for the RF signal path, keeping the RF path short, avoiding noisy sources near RF lines, and using low ESR ceramic bypass capacitors.
Handling Guidelines: The PX1100S modules are rated MSL4 and require specific handling for SMT reflow mounting, including usage within 72 hours of opening the moisture barrier bag or pre-baking if the floor life is exceeded. It is an ESD sensitive device and should be handled with care.