Cerambyx64

At the rear bottom is the core of the build, featuring an SBC Lattepanda Sigma with an Intel i5-1340P, capable of handling heavy tasks like running srsRAN with the USRP B205mini, while managing all devices simultaneously to perform multiple tasks at once.

Behind the SBC, a Samsung T7 USB SSD can be installed, connecting to the SBC via a separate USB controller from the USB hubs. This setup is crucial for recording long sessions of raw data from SDR radios without losing received samples, as it uses a different controller from the one managing the hubs and their connected devices.

GL.iNet AXT1800 router, operational in just 45 seconds, runs on OpenWRT with manufacturer customizations for quick and easy VPN setup.

With its two Ethernet ports, the SBC can be configured to have a VPN on one port and a direct internet connection on the other.

The router’s Wi-Fi antennas are located at the rear right. They enable remote connection to the SBC from another device, and through the router interface, you can easily connect to a Wi-Fi hotspot for internet access.

The two Noctua NF-A4x20 5V fans keep the devices' temperatures within operational limits.

Two externally powered 7-port Orico USB hubs, USB 3.2 Gen 2 at 10Gbps. The new USB standard avoids the typical interference generated by USB 3.0 devices, which can compromise signal reception across a wide frequency range.

Option to install an M.2 Wi-Fi module with antennas located on the rear left side.

Easy access to the Catsniffer V.3 buttons.

Easy disconnection of the USRP B205mini. When powered, this device starts in USB 2.0 mode and switches to USB 3.0 after the firmware is manually loaded. It’s the only USB 3.0 device in the setup, and as known, USB 3.0 generates interference that reduces the performance of the installed Wi-Fi adapters, though it has minimal impact on GPS reception. Therefore, it can be useful to disconnect it when not in use.

Paired with the SDR B205mini is the Leo Bodnar Mini Precision GPS Reference Clock, useful for calibrating SDRs or reliably operating on cellular networks, for example.

Nooelec NESDR SMArTee with always-on bias-tee, paired with a Bonito GA3005 wideband antenna (9KHz-3GHz). This SDR can power the active antenna without needing a power inserter.

uBlox NEO-M9N GPS receiver, essential for tasks like wardriving.

At the top left, an ALFA AWUS036ACHM Wi-Fi adapter (without its case) is installed, along with two other ALFA Network adapters: AWUS036AXM and AWUS036ACM, plus the M.2 Wi-Fi module AX210 installed on the SBC. All can be used in monitor mode.

N.1 Powers the router and fans, ensuring it's the last to run out of charge, with a 12-hour battery life. This guarantees continuous remote connection to the computer in the backpack and prevents the fans from losing power.

N.2 It powers the USB hubs. If the battery runs out, connected devices won’t be interrupted, as the Lattepanda Sigma will take over the power supply.

N.3-4 They power the Lattepanda Sigma, which has two inputs for power: via USB-C PD and a 5.5x2.5mm DC jack.

The Lattepanda Sigma draws power from both power banks in varying amounts. If one power bank runs out, there will be no interruption, and the computer will continue running smoothly. This has been tested with a maximum CPU TDP of 28W.