Product descriptions from the supplier

RFD900X Support PPM / SBUS remote control signal forwarding

RFD900A Not support PPM / SBUS remote control signal forwarding

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New Features:

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*

Features:

Long range >40km depending on antennas and GCS setup *80km demonstrated by Edge Research labs on a balloon !, 57km in India, on Dipoles.

2 x RP-SMA RF connectors, diversity switched.

1 Watt (+30dBm) transmit power.

Transmit low pass filter.

> 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.

Compatible with 3DR / Hope-RF radio modules.

License free use in Australia, Canada, USA, NZ

Interfaces:

RF : 2 x RP-SMA connectors

Serial: Logic level TTL (+3.3v)

Power: +5v, ~800mA max peak (at maximum transmit power)

GPIO: 6 General purpose IO (Digital, ADC, PWM capable).

Specifications:

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.