The Alén Space TOTEM Software Defined Radio (SDR) is a flight-proven SDR system suitable for communication nanosatellites.

TOTEM operates in commonly-used nanosatellite frequency bands using an SoC, with an embedded Linux and programmable logic.

It also includes a wide frequency range transceiver and can be reconfigured in-orbit.

Key features

  • High-performance System-On-Chip (SoC) - Xilinx Zynq-7000 series
  • Wide frequency range RF transceiver (AD9364)
  • FSI-connector based interface
  • Option to combine in the same payload several applications (SDR, ADS-B, AIS, IoT, and SIGINT) with different frequency bands
  • Operational across several frequency bands: UHF, VHF, S-band, L-band, X-band, Ka-band and Ku-band

Flight heritage

The system has achieved flight heritage.

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Last updated: 2021-12-27

TOTEM Software Defined Radio (SDR)



< 130 g
93.30 mm
89.30 mm
13.61 mm
supply voltage
5 V
transmit power
2.65 W (7dBm output, @ 56 MHz and 30 MSPS)
transmit frequency
70 MHz to 6 GHz
receive power
2.25 W
receive frequency
70 MHz to 6 GHz
1 GB DDR3L (512 MB with ECC)
NAND flash
1 GB
data interface
operating temperature
-40 to 85 C


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