RFD900A Pix Modem Ultra Long Range 40 Km Radio Telemetry Kit

Rfd. is a wireless data transmission module with a small footprint and excellent performance. Main features:

• Regardless of the radio design, each module is integrated with a USB serial port chip and the USB and UART interfaces switch automatically. USB takes priority.
• Operating frequency range: 902-928 MHz, ISM band.
• The transmitter circuit is designed with a low noise amplifier greater than 20dB and a low-pass filter unit is added.
• Adjustable transmit power, maximum 1W transmit power.
• The high-sensitivity LNA and saw circuits are located in front of the receiver circuit.
• The external communication distance can be up to 40 km or more (depending on antenna performance and communication speed requirements).
• The air data rate can be up to 250 kbps.
• Dual antenna interface supporting antenna diversity and different antenna configurations.
• Dual antenna interface supporting antenna diversity and different antenna configurations.
• The module has a temperature monitoring function and automatically adjusts the duty cycle according to the temperature to prevent overheating.
• Operating temperature: -40 to +85℃.
• Size: 33mm*53mm*9.5mm. Weight: 23g.
• Long range capabilities have been demonstrated in edge research labs on balloon (>40km*80km), 57km in India, with dipole antennas.
• 2 x RP-SMA RF connector, diversity modified.
• 1 Watt (+30dBm) transmission power.
• Transmission low-pass filter.
• >20dB low noise amplifier, high IP3.
• RX saw filter
• All I/Os are ESD protected and filtered.
• Reimplemented SiK and multi-SiK software is easy to field update and configure.
• Compatible with 3DR / Hope-RF radio modules.

Interfaces

• RF: 2 x RP-SMA connectors.
• Serial: TTL logic level (+3.3v).
• Power: +5v, ~max peak (at maximum transmit power).
• GPIO: 6 general purpose IOs (digital, ADC, PWM capable).

Software/GCS Support

• The software solution is an open source development called "SiK", adapted for the new processor architecture. A bootloader and interface for additional enhancements and field updates are available via serial port.
• Most parameters can be configured with AT commands, e.g. baud rate (air/UART), frequency band, power levels.
• Integrated support for configuring RFD900 radios is supported by APM Planner.
• Default settings are 57600 baud, N, 8, 1 and 64k air data rate.