SkyTraq PX1120S Manual

SkyTraq PX1120S Manual

L1 quad constellation gnss receiver module

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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, SAW Filter, TCXO, RTC Xtal
Works with active and passive antenna
On board active antenna short protection
On board active antenna detection
Complete receiver in 12.2mm x 16.0mm size
Operating temperature -40 ~ +85ºC
Pb-free RoHS compliant
Applications
Navigation and asset tracking
Timing reference
SkyTraq Technology, Inc.
L1 Quad Constellation
GNSS Receiver Module
The PX1120S 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
PX1120S 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. PX1120S
can acquire, track, and get position fix autonomously in
difficult weak signal environment. Its high 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.
The receiver module contains SAW filter and a notch filter
to remove out-band interference and LTE B13 signal at the
RF input prior to the first stage LNA. This configuration
allows normal operation even under strong RF interference
when cellular modem is near the PX1120S.
PX1120S is backward pin-to-pin compatible with earlier
SkyTraq 12mm x 16mm form factor GNSS module, allowing
very easy migration.
1
Preliminary Draft
www.skytraq.com.tw

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Summary of Contents for SkyTraq PX1120S

  • Page 1 L1 Quad Constellation GNSS Receiver Module Features The PX1120S is a satellite navigation receiver capable of ⚫ 230 acquisition/tracking channels using GPS, Beidou, Galileo, GLONASS, QZSS, SBAS signal to ⚫ Support global GPS, Beidou, Galileo, GLONASS provide 3D navigation in a single compact SMD module. The PX1120S can track all in-view GPS, Beidou, Galileo, ⚫...
  • Page 2: Technical Specifications

    A-GPS Server-based AGPS Update Rate 1 / 2 / 4 / 5 / 8 / 10 / 20 / 25 Hz (default 1Hz) 50 / 100 Hz (PX1120S-H only) Dynamics 4G (39.2m/sec Operational Limits Altitude < 80,000m and velocity < 515m/s Serial Interface 3.3V LVTTL level...
  • Page 3: Block Diagram

    The simple UART serial interface and the standard NMEA-0183 protocol make usage of PX1120S very easy and straightforward. PX1120S module performs all the necessary system initialization, signal acquisition, signal tracking, data demodulation, and calculation of navigation solution autonomously. MODELS SkyTraq Technology, Inc. Preliminary Draft www.skytraq.com.tw...
  • Page 4: Mechanical Characteristics

    Only needed when power supply rise time is very slow or software controlled reset is desired. Not used. Leave unconnected SPI_CSN Ground RF signal input, connect to L1 GNSS antenna. RF_IN 3.2V active antenna bias on RF_IN. Ground Ground SkyTraq Technology, Inc. Preliminary Draft www.skytraq.com.tw...
  • Page 5 In the idle condition, this pin should be driven HIGH. If the driving circuitry is powered independently of PX1120S, ensure that this pin is not driven to HIGH when primary power to PX1120S is removed, or a 10K-ohm series resistor can be added to minimize leakage current from application to the powered off module.
  • Page 6: Electrical Specifications

    Backup Current (VCC voltage applied) Backup Current (VCC voltage off) Output Low Voltage Volt Output HIGH Voltage Volt Input LOW Voltage Volt Input HIGH Voltage Volt Input LOW Current Input HIGH Current RF Input Impedance (RFIN) SkyTraq Technology, Inc. Preliminary Draft www.skytraq.com.tw...
  • Page 7: Application Circuit

    APPLICATION CIRCUIT When PX1120S has previously been used within 2 hour, for faster time to first fix powering up without needing to decoded ephemeris data from signal, V_BCKP should be connected to non-volatile supply; above figure with V_BCKP connected to rechargeable battery is an example implementation. If cold starting every time powering up is not an issue, V_BCKP can be connect to VCC.
  • Page 8: Antenna Considerations

    It has the flexibility of being located remotely from the module, but requires antenna power. Active antenna usually costs more than passive patch antenna, but the performance in low signal environments is usually better. Active antenna with gain of 10 ~ 20dB and noise figure less than 1.5dB can be used with PX1120S. SkyTraq Technology, Inc.
  • Page 9: Power Supply Requirement

    POWER SUPPLY REQUIREMENT PX1120S requires a stable power supply, avoid ripple on VCC pin (<50mVpp). Power supply noise can affect the receiver’s sensitivity. Bypass capacitors of 10uF and 0.1uF is recommended to be placed close to the module VCC pin;...
  • Page 10: Layout Guidelines

    HANDLING GUIDELINE The PX1120S modules are rated MSL4, must be used for SMT reflow mounting within 72 hours after taken out from the vacuumed ESD-protective moisture barrier bag in factory condition < 30degC / 60% RH. If this floor life time is exceeded, or if the received ESD-protective moisture barrier bag is not in vacuumed state, then the device need to be pre-baked before SMT reflow process.
  • Page 11 “*” Checksum delimiter. Checksum field. <CR><LF> 0D0A Ending of sentence. (carriage return, line feed) Table 2: Overview of SkyTraq receiver’s NMEA messages $GPGGA Time, position, and fix related data of the GPS receiver. $GNGLL Position, time and fix status. $GNGSA Used to represent the ID’s of satellites which are used for position fix.
  • Page 12 Geoidal Separation 19.6 Geoidal separation in meters Age pf Differential Age of Differential GPS data GPS data NULL when DGPS not used DGPS Station ID 0000 Differential reference station ID, 0000 ~ 1023 Checksum SkyTraq Technology, Inc. Preliminary Draft www.skytraq.com.tw...
  • Page 13 Status, ‘A’ = Data valid, ‘V’ = Data not valid Mode Indicator Mode indicator ‘A’ = Autonomous mode ‘D’ = Differential mode ‘E’ = Estimated (dead reckoning) mode ‘M’ = Manual input mode ‘S’ = Simulator mode ‘N’ = Data not valid Checksum SkyTraq Technology, Inc. Preliminary Draft www.skytraq.com.tw...
  • Page 14 GNSS System ID GNSS system ID 1 = GPS 2 = GLONASS 3 = GALILEO 4 = BDS 5 = IRNSS Checksum *GNSS System ID identifies the GNSS system ID according to Table 3. SkyTraq Technology, Inc. Preliminary Draft www.skytraq.com.tw...
  • Page 15 L5-I L5-Q GLONASS 2 (GL) All signals G1 C/A G2 C/A GLONASS (M) G2P GALILEO 3 (GA) All signals E5 a+b E6-A E6-BC L1-A L1-BC 4 (BD) All signals IRNSS 5 (GI) All signals SkyTraq Technology, Inc. Preliminary Draft www.skytraq.com.tw...
  • Page 16 Satellite azimuth angle in degrees, (000 ~ 359 ) C/No in dB (00 ~ 99) Null when not tracking GNSS System ID Signal ID Checksum *GNSS Signal ID identifies the GNSS signal name according to Table 3. SkyTraq Technology, Inc. Preliminary Draft www.skytraq.com.tw...
  • Page 17 Navigation status indicator according to IEC61108 requirement on ‘Navigational (or Failure) warnings and status indicators’. ‘S’ = Safe ‘C’ = Caution ‘U’ = Unsafe ‘V’ = Navigation status not valid, equipment is not providing navigation status indicator. checksum SkyTraq Technology, Inc. Preliminary Draft www.skytraq.com.tw...
  • Page 18 UTC time: month (01 ~ 12) UTC Year UTC time: year (4 digit format) Local zone hour Local zone hours (00 ~ +/- 13) Local zone minutes Local zone minutes (00 ~59) Checksum Checksum SkyTraq Technology, Inc. Preliminary Draft www.skytraq.com.tw...
  • Page 19: Ordering Information

    Model Name Description PX1120S L1 Quad GNSS Receiver Module PX1125S-01B Crystal Oscillator + Temperature Sensor Version of PX1120S Supporting GPS / GLONASS / Galileo for TCXO Shortage Period. PX1120S-G GPS-only version, NMEA 3.1 Output Compatible with S1216F8 PX1120S-GG GPS/GLONASS version, NMEA 3.1 Output Compatible with S1216F8-GL PX1120S-GG12 GPS/GLONASS version, NMEA 3.1 Output Compatible with S1216F8-GL12...
  • Page 20 Removed page-2 footnote January 29, 2021 Updated ordering information May 4, 2021 Updated current consumption August 4, 2021 Added PX1120S-H and models description October 14, 2021 Updated ordering information November 1, 2021 Updated ordering information March 2, 2022 Updated position accuracy number The information provided is believed to be accurate and reliable.

This manual is also suitable for:

Px1125s-01bPx1120s-gPx1120s-ggPx1120s-3gPx1120sh

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