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Frequently Asked Questions

I have no connectivity to the Radio

  • Ensure that the FPGA DIP Switch (SW4) is set to 0, 0, 1 as shown in the figure below.


  • Ensure that you are able to see the Xilinx FPGA on the PCIe bus:
    $ lspci
    should return:
    00:01.0 PCI bridge: NVIDIA Corporation Device 10e5 (rev a1)
    01:00.0 Serial controller: Xilinx Corporation Device 7024


How do I enable WiFi / Bluetooth

The AIR-T has WiFi and Bluetooth capability that is supported through the NVIDIA Jetson TX2 module. To use these features, you must purchase an after-market antenna and cables. Since the system is MIMO capable, two antennas are required.

Required Parts

  • An AIR-T with enclosure
  • Antennas (x2): 2.4/5/8 GHz Dual Band, Pulse Electronics W1043, Purchase

  • Cables (x2): U.FL mini to RP-SMA, Linx Technologies CSJ-RGFB-200-MHF4, Purchase


  1. Open the AIR-T enclosure by removing the screws on the feet and sliding out the housing.

  2. Connect the cables to the Jetson module as shown in the photo below.

  3. Remove the nut and washer from the cable assemblies and route the cables to the WiFi / Bluetooth through holes on the back of the AIR-T enclosure. Place the washer on the RP-SMA connectors and tighten the nuts.

  4. Connect the antennas to the RP-SMA connector on the enclosure.

  5. Reassemble the enclosure and boot the AIR-T.

  6. Enable WiFi and/or Bluetooth in the network manager settings.


I receive a SoapySSDPEndpoint error when starting the radio

For some versions of AirStack, you will receive the following "Error" which should actually be a warning:

[ERROR] SoapySSDPEndpoint::sendTo(udp://[ff02::c]:1900) = -1
  sendto(udp://[ff02::c]:1900) [99: Cannot assign requested address]

This is not an error. One of the Soapy plugins (to allow the AIR-T to be controlled over a network) needs to be configured for your network. This message does not affect the AIR-T functionality.


I need the serial number and it isn't printed on my enclosure

  1. Turn over the AIR-T and use the phillips head screwdriver to remove the 4 screws shown in the left figure below.
  2. Remove the aluminum spacers by sliding them out of the feet as shown in the middle figure below.
  3. The serial number of the unit is printed on the white sticker, as shown in the right figure below.

Last update: May 6, 2022