SkyTraq PX1100T Manual

SkyTraq PX1100T Manual

L1 quad constellation precision timing mode 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
5nsec (1-sigma) timing accuracy
Position hold mode for GNSS timing operation
1PPS generation with 1 satellite in view
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
Application
Timing reference
SkyTraq Technology, Inc.
L1 Quad Constellation
Precision Timing Mode
GNSS Receiver Module
PX1100T is a single chip, quad GNSS receiver targeting
precision timing applications. The PX1100T is capable of
using GPS, GLONASS, Galileo, Beidou, QZSS, and SBAS signal
to provide precise 1PPS signal generation in a small SMD
module. 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 position, velocity, and date/time output along
with 1PPS signal.
Global quad-constellation GNSS signal receiving capability
enables using greater number of satellite signal than GPS or
GPS/GLONASS receivers. The increased satellite number
offers superior performance in challenging urban canyon
environments.
Self-survey and position-hold operation reduces timing jitter
and enables synchronization to be maintained down to
using a single satellite.
Single-chip Phoenix positioning engine is inside the receiver
module. It features high sensitivity and fast TTFF. The
PX1100T can acquire, track, and get position fix
autonomously in difficult weak signal environment. Its high
tracking sensitivity allows continuous operation 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 fast
signal acquisition and TTFF speed.
1
Preliminary Draft
www.skytraq.com.tw

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Summary of Contents for SkyTraq PX1100T

  • Page 1 L1 Quad Constellation Precision Timing Mode GNSS Receiver Module Features PX1100T is a single chip, quad GNSS receiver targeting ⚫ 230 acquisition/tracking channels precision timing applications. The PX1100T is capable of ⚫ Support global GPS, Beidou, Galileo, GLONASS using GPS, GLONASS, Galileo, Beidou, QZSS, and SBAS signal ⚫...
  • Page 2: Technical Specifications

    Acquisition 75mA @ 3.3V, Tracking 65mA @ 3.3V Dimension 10.1mm L x 9.7mm W x 2.9mm H Weight: Operating Temperature C ~ +85 Storage Temperature -55 ~ +100 Humidity 5% ~ 95% * used with good quality external LNA SkyTraq Technology, Inc. Preliminary Draft www.skytraq.com.tw...
  • Page 3: Block Diagram

    The simple UART serial interface and the standard NMEA-0183 protocol make usage of PX1100T very easy and straightforward. PX1100T module performs all the necessary system initialization, signal acquisition, signal tracking, data demodulation, and calculation of navigation solution autonomously. SkyTraq Technology, Inc. Preliminary Draft www.skytraq.com.tw...
  • Page 4: Operation

    OPERATION When PX1100T is turned on, it automatically begin to acquire and track GNSS signal. After valid ephemeris data is collected for each tracked satellite signal and ready for position fix, it performs self-survey of its location in Survey Mode. After 2000 position fixes (configurable) the PX1100T automatically enters Static Mode, a clock over-determined time-only mode.
  • Page 5: Pinout Description

    In the idle condition, this pin should be driven HIGH. If the driving circuitry is powered independently of PX1100T, ensure that this pin is not driven to HIGH when primary power to PX1100T is removed, or a 10K-ohm series resistor can be added to minimize leakage current from application to the powered off module.
  • Page 6 Programmable 1PPS phased-locked frequency output, 1Hz ~ 19.2MHz. 1PPS2 Not used. Leave unconnected Not used. Leave unconnected No connection for normal use. Pull-low for loading firmware into empty or BOOT_SEL corrupted Flash memory from ROM mode. SkyTraq Technology, Inc. Preliminary Draft www.skytraq.com.tw...
  • Page 7: 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 (RF_IN) SkyTraq Technology, Inc. Preliminary Draft www.skytraq.com.tw...
  • Page 8: Application Circuit

    APPLICATION CIRCUIT When PX1100T 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 9: Mechanical Dimensions

    MECHANICAL DIMENSIONS RECOMMANDED FOOTPRINT SkyTraq Technology, Inc. Preliminary Draft www.skytraq.com.tw...
  • Page 10 The reflow profile shown above should not be exceeded, since excessive temperatures or transport times during reflow can damage the module. Cooling temperature fall rate: max 3°C / sec ANTENNA SECTION CONSIDERATION PX1100T can be used with active antenna or passive antenna. Below are possible design options. SkyTraq Technology, Inc. Preliminary Draft www.skytraq.com.tw...
  • Page 11: Power Supply Requirement

    Active antenna with one stage LNA gain of 10 ~ 20dB and noise figure less than 1.5dB can be used with PX1100T. Antenna Type...
  • Page 12: 1Pps Output

    HANDLING GUIDELINE The PX1100T 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 13 “*” 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 14 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 15 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 16 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 17 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 6 (GI) All signals SkyTraq Technology, Inc. Preliminary Draft www.skytraq.com.tw...
  • Page 18 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 19 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 20 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 21 Threshold, static mode is entered and this value will be locked to the last calculated value. Null field when in PVT mode. If the receiver enters static via user input, this field will show default value of 0. Unit: meter Checksum SkyTraq Technology, Inc. Preliminary Draft www.skytraq.com.tw...
  • Page 22: Ordering Information

    ORDERING INFORMATION Model Name Description PX1100T L1 Quad GNSS Timing Mode Receiver Module PX1100T-G L1 GPS-Only Timing Module, NMEA 3.1 Output Compatible with Venus838LPx-T PX1100T-GG L1 GPS/GLONASS Timing Module, NMEA 3.1 Output Compatible with S1216F8-GL-T SkyTraq Technology, Inc. Preliminary Draft www.skytraq.com.tw...
  • Page 23 Initial release October 6, 2021 Added PX1100T-GG to Ordering Information The information provided is believed to be accurate and reliable. These materials are provided to customers and may be used for informational purposes only. No responsibility is assumed for errors or omissions in these materials, or for its use. Changes to specification can occur at any time without notice.

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