Remote SDR

“Remote SDR” is a web application allowing to remotely control an amateur radio transceiver between 1 MHz and 6 GHZ. Its first application was the duplex control of a transceiver dedicated to the QO-100 / Es’Hail 2 geostationary satellite.

The set is made up of:

• a reception channel: SDR (Software Design Radio) + an Orange PI nanoprocessor
• a transmitter channel: SDR + an Orange PI nanoprocessor
• a PC or tablet controlling the SDRs with “Remote SDR” running on a web browser like Chrome or Edge.

This configuration makes it possible to locate the HF part near the antennas, which is essential for links above GHz. In the transmission chain, amplifiers must be added to bring the HF signal to the desired level. The SDR of the reception chain can be either an Hack RF One or an RTL-SDR depending on the frequency band you want to cover.

The “Orange Pi” are processors similar to the Raspberry Pi running under the Armbian Operating System. They do part of the signal processing.

The reception chain processed in the Orange Pi is described in the article Remote SSB receiver.

The transmission chain processed in the second Orange Pi is described in the article Remote SSB transmitter.

Remote SDR provides the part of the signal processing necessary for data visualization and audio management.

Video – Intro

The code

You can choose between installing the source code yourself on an Orange Pi One Plus or burning an image. Both are available on Github / F1ATB. For installation procedures the following article details them.

Posts on Remote-SDR

• Remote SDR – Purchase
• Remote SDR – Setup
• HackRF – Orange PI – GNURADIO Setup
• Remote SDR – Man Machine Interface
• Remote SDR – Signal Processing
• Remote SDR
• Web Client to GNU Radio
• GNU Radio to Web client
• Remote SSB Transmitter
• Remote SSB Receiver
• GPIO on Orange PI One Plus H6
• TCXO installation on HackRF
• Q0-100 Transceiver with 2 SDR