RFD 900 Modem

Website:

http://rfdesign.com.au/products/rfd900-modem/

Purchased from:

http://store.rfdesign.com.au/rfd-900p-modem/

Description: The RFD900+ is a high performance 900MHz, ISM band radio modem covering the 902 – 928 MHz frequency band. It is designed for long range serial communications applications requiring best in class radio link performance. Key Features:

Long range >40km depending on antennas and GCS setup 2 x RP-SMA RF connectors, diversity switched. 1 Watt (+30dBm) transmit power. Transmit low pass filter. > 20dB Low noise amplifier. RX SAW filter. Passive front end band pass filter. Open source firmware (V1.x) / tools, field upgradeable, easy to configure. Small, light weight. Compatible with 3DR / Hope-RF radio modules. License free use in Australia, Canada, USA, NZ.

Compliance:

The RFD900 is designed to be compliant with the following standards:

FCC Part 15.247 (Frequency hopping and digitally modulated intentional radiators) AS/NZS 4268:2012 (Radio equipment and systems – short range devices)

Specifications:

Frequency Range: 902 – 928 MHz (USA) / 915 – 928 MHz (Australia) Output Power: 1W (+30dBm), controllable in 1dB steps ( +/- 1dB @ <20dBm, +/- 0.5dB >=20dBm typical ) Air Data transfer rates: 4, 8, 16, 19, 24, 32, 48, 64, 96, 128, 192 and 250 kbit/sec ( 64k/128k default ) UART data transfer rates: 2400, 4800, 9600, 19200, 38400, 57600, 115200 baud ( 57600 default ) 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 extremities 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

Interfaces:

RF : 2 x RP-SMA antenna connectors – it is OK to have only one antenna connected Serial: Logic level RS232 (+3.3v nominal, +5v tolerant) Power: +5v, ~800mA max peak (at maximum transmit power) GPIO: 6 General purpose IO (Digital, ADC, PWM capable).

The following cable from FTDI is compatible with the RFD900 modem. Pin 1 of the FTDI cable connects to Pin 1 of the RFD900 header. http://www.ftdichip.com/Support/Documents/DataSheets/Cables/DS_TTL-232R_CABLES.pdf

To power the modem from the +5V USB power, a jumper is needed between pins 4 and 6. To power the modem from an external +5V supply, connect power to pins 2 and 4.