Development Board

The development board is intended for developers and advanced users. It features USB Type-C connectors and can be connected to a computer via a PCIe x4 slot

Features

  • Simple Radio Frontend: Facilitates prototyping in the 2.4-GHz ISM band

  • Cellular Band Duplexer: Supports common cellular frequency bands.

  • Enhanced TRX Power

  • Improved RX Sensitivity

  • Extended Automatic Gain Control (AGC)

  • Precision Clock Synchronization: Synchronization via a GNSS module.

  • Mounting Options: Includes mounting holes for a heatsink or enclosure.

The development board

Technical Specifications

  • GPSDO: GNSS module + 12-bit DAC for VCTCXO

  • GPIO: 12 GPIOs in six banks with different voltage levels (1.8 - 5 V)

  • USB Type-C: 5 V, 3 A (USB 3.0 lines routed, currently without gateware support)

  • RF filters:
    • 3.0 - 3.8 GHz

    • 2.1 - 3.0 GHz (ISM, Wi-Fi, Bluetooth, Zigbee)

    • 0 - 2.1 GHz

    • 0 - 1.2 GHz

  • TX filters:
    • 0 - 3.8 GHz

    • 0 - 2.1 GHz

    • 0 - 1.2 GHz

  • LNA/PGA: MiniCircuits PGA-103+

The development board: block diagram

Installation

The development board comes with a factory setup after testing. To use the full potential of the board, some cable re-routing needs to be applied.

  • Plug in the uSDR using a thin thermal interface in between.

  • Gently unplug the cables from connectors J20 and J19.

The development board: default wiring
  • Use your MHF4 - MHF4 jumpers to connect the uSDR RX/TX to J20 and J19.

  • The two available SMA cables can be plugged into the uSDR HF connector and the 1PPS connector (see the picture).

The development board: uSDR rewiring
  • Apply a thicker thermal interface (2.0 mm) and the heatsink as described in the Heatsink installation chapter.

  • Here is the final SMA schematic on the panel.

The development board: final wiring

Note

If you don’t need to use the development board, you can route SMA cables directly to the uSDR connectors in the order you want.