Description:

This is the ideal solution for long range telemetry or communication . Two RFD 900X Modems with antennas for all antenna port .

Features:

  • Long range >40km depending on antennas and GCS setup
  • 2 RP-SMA RF  connector , diversity switch
  • Transmit low pass filter
  • 1 Watt (+30dBm) transmit power
  • > 20dB Low noise amplifier, high IP3
  • RX SAW filter
  • All I/O ESD protected and filtered.
  • Re implemented SiK and Multipoint SiK firmware, field upgradeable, easy to configure.
  • Small, light weight.
  • License free use in Australia, Canada, USA, NZ
  • Compatible with 3DR /Hope-RF radio modules
  • New Processor, ARM 32 bit core.
  • Air data rate: 500kbit/s.
  • AES Hardware accelerated encryption. *Fully working*
  • RC PPM Passthrough with telemetry at the same time.
  • Fully ESD protected + filtered – Every IO port is protected and filtered.
  • Original SiK point to point, multipoint firmware implemented.
  • Asynchronous multipoint firmware, *Beta release*

Interface:

  • RF : 2 x RP-SMA connectors
  • Serial: Logic level TTL (+3.3v nominal, +5v tolerant)
  • Power: +5v, ~800mA max peak (at maximum transmit powe
  • GPIO: 6 General purpose IO (Digital, ADC, PWM capable).

Specification:

  • Frequency Range:  902 – 928 MHz (USA) / 915 – 928 MHz (Australia)
  • Output Power: 1W (+30dBm), controllable in 1dB steps ( +/- 1dB @=20dBm typical )
  • Air Data transfer rates: 4, 8, 16, 19, 24, 32, 48, 64, 96, 128, 192 and 250, 500 kbit/sec ( User selectable, 64k default )
  • UART data transfer rates: 9600, 19200, 38400, 57600, 115200, 400k, 921k baud  ( User selectable, 57600 default )
  • Output Power: 1W (+30dBm)
  • Receive Sensitivity: >121 dBm at low data rates, high data rates (TBA)
  • Size: 30 mm (wide) x 57 mm (long) x 12.8 mm (thick) – Including RF Shield, Heatsink and connector extremeties
  • Weight: 14.5g
  • Mounting: 3 x M2.5 screws, 3 x header pin solder points
  • Power Supply: +5 V nominal, (+3.5 V min, +5.5 V max), ~800 mA peak at maximum power
  • Temp. Range: -40 to +85 deg C, tested operational from -73 to +123 deg C.

Software/ GCS Support :

  • The software solution is an open source development called “SiK” . A boot loader and interface is available for further development and field upgrade of the modem firmware via the serial port.
  • Most parameters are configurable via AT commands, Eg. baud rate (air/uart), frequency band, power levels, etc.
  • V2.x firmware has been updated to support multipoint networking on the RFD900.
  • V1.x (non multipoint) is suitable for point to point links – the sourcecode is located at: Link
  • 3DR/RFD900 compatible configuration tool : Link
  • Integrated support for configuring the RFD900 radios is supported by APM Planner, with other GCS solutions in development.
  • The default settings are at 57600 baud, N, 8, 1, and 64k air data rate.

Software feature includes:

  • Frequency hopping spread spectrum (FHSS)
  • Transparent serial link
  • Point to Point, or Multipoint networking
  • Configuration by simple AT commands for local radio, RT commands for remote radio
  • User configurable serial data rates and air datarates
  • Error correction routines, Mavlink protocol framing (user selectable)
  • Mavlink radio status reporting (Local RSSI, Remote RSSI, Local Noise, Remote Noise)
  • Automatic antenna diversity switching on a packet basis in realtime
  • Automatic duty cycle throttling based on radio temperature to avoid overheating

 

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