Description:

The SN-4706 is an ultra-compact 24‑channel navigation receiver. It is designed for integrating into various systems as a measuring element for coordinates, a velocity vector and time.

The SN-4706 determines coordinates of current location (latitude, longitude and height), a velocity vector and current time by using signals of GLONASS, GPS and SBAS satellite navigation systems.

Functions:

The SN-4706 navigation receiver is designed as a surface mount device (SMD), taking into account the mass production requirements
Following features are implemented in the SN‑4706:

- separate channels for GLONASS and GPS satellite navigation systems what provides higher noise immunity

- high performance RAIM algorithms designed for slow changing objects

Small dimensions of the SN-4706 and surface mounting capabilities which eliminate usage of high- and low-frequency connectors provide convenience and low cost when solving different navigation tasks

Reciever is designed for use as a part of the following equipment:

• Car antitheft systems
• Traffic tracking systems
• Personal navigation devices
• Navigation devices
• Base stations of mobile network
• WiFi, WiMAX and others access station
• Other communication equipment

Following tasks can be solved by the SN‑4706 receiver:

• Receiving and processing GLONASS, GPS and SBAS (EGNOS/WAAS/MSAS) signals by using CT and C/A open civil codes
• Automatic and continuous determining of location coordinates (latitude, longitude and height), time, a velocity and its direction
• Sending to external devices current coordinates in different coordinate systems (WGS-84, PЗ-90, SK-42, SK-95)
• Updating location coordinates with 1, 2, 5 Hz periodicity
• Estimation of the accuracy of measured navigation parameters
• Receiving, storing and updating of GLONASS, GPS and SBAS almanac information
• Communication with external systems using NMEA‑0183 (IEC 1162) and/or BINR protocols (the BINR protocol is designed by NAVIS)
• Receiving and registering the correction information according to RTCM SC-104 V2.2 recommendations
• Communication via SPI interface with external devices
• Producing of input/output signals for an external equipment
• Possibility to implement user interface by means of configurable inputs/outputs
• Generating time mark signals

Specification:

• Number of receive channels: 24
• Mode: All - in - view
• GLONASS: L1-range (1592-1606 MHz), CT-code
• GPS/WAAS/EGNOS: L1-range (1575.42 MHz), C/A-code
• Accuracy of determining (RMS):
  
  • horizontal coordinates:
    • in the autonomous mode 3 m
    • in the differential mode 2 m
  • height: 5 m
  • velocity: 0,1 m/sec
  • time: 25 ns
• Time necessary for receiving navigation parameters,not more than:
  • cold start: 50 sec
  • hot start: 5 sec
  • recapturing after loss of the signal for 20 sec: 3 sec
• Sensitivity: -163 dBW
• Moving parameter limits:
  • ground speed: 0 to 500 m/sec
  • acceleration: < 5g
  • height: < 18 000 m
• Power consumption, not more than:
  • holdover mode: 0,9 W
  • tracking mode: 0,65 W
  • "pulse" mode: 0,45 W
  • waiting mode: 0,3 W
• Dimensions: 35х35х7 mm
• Weight: 10 g

Servicing characteristics:

• Operating temperature: -40 to +85°C
• Maximum operating humidity: 98% (at 40°С)

Interface:

• Two RS-232Е input/output ports
• Protocols: IEC1162 (NMEA0183), BINR, RTCM SC 104 v2.2
• Baud rate: up to 230400 bit/sec
• Time mark: 1Hz, СMOS levels