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