← All worlds
03 / THE WORLD OF LISTENING

Decodium
SDR.

Beyond a single frequency.

MULTI-CHANNEL RXIQ RECORDINGUSB + NETWORK
9H1SR / RADIO LAB↓EXPLORE
03LISTEN FURTHER

A whole spectrum.
A world to explore.

Explore the spectrum, open multiple receive channels and revisit signals in your recordings. The Decodium ecosystem’s SDR receiver for local and network sources.

DECODIUM SDR / RECEIVE · EXPLORE · RECORDTHE SIGNAL PATH
01 / SOURCERFThe radio source
→
02 / BASEBANDIQThe digital signal
→
03 / PROCESSINGDSPFilters & demodulation
→
04 / LISTENINGAFThe recovered sound
SSBCWAM / SAMFMIQ
01

The spectrum comes alive.

Spectrum and waterfall displays, multiple receive channels and independent VFOs to follow the activity. Receive SSB, CW, AM and FM.

02

From source to sound.

Native RTL-SDR, compatible devices through SoapySDR and network sources including rtl_tcp, SpyServer and SDR++ Server.

03

A signal worth revisiting.

IQ and audio recording, frequency memories and a band scanner to explore and organise your listening.

Features described in the project documentation. Available hardware and options depend on the backend, bundled modules and platform. Read the documentation
DETAILSINSIDE THE PROJECT

The possibilities,
in detail.

Features, integrations and operating conditions, with direct links to project sources.

The connection guide
01Revisit the recorded band.

Reopen an IQ recording, find a moment and tune to another signal within the recorded bandwidth. Pause, seeking and looping help you explore it. An audio file preserves the demodulated sound instead; when keeping IQ files, retain their recording metadata alongside them.

Source & documentation
02Schedule your next listening session.

The scheduler plans tuning, scanning, and the start or stop of IQ and audio recordings using UTC times. It handles reception only. Keep the application running with a connected source; jobs missed while it was closed are not automatically replayed when it starts again.

Source & documentation
03Connect a conventional radio too.

The audio + CAT backend receives demodulated audio from a compatible radio and follows its frequency and mode through direct control or rigctld. On this path, the displayed spectrum is limited to the available audio bandwidth; it does not become a wideband RF IQ stream.

Source & documentation
RXYOUR FIRST LISTEN

Choose your source.
Follow your curiosity.

A USB receiver, a network source or the demonstration backend: start with the path that suits your station.

Getting started with SDR
Decodium SDR project icon
Decodium SDRMartino Merola · IU8LMC & Salvatore Raccampo · 9H1SR
YOUR NEXT SIGNAL STARTS HERE

Your next frequency
is waiting.

Download the software

Windows · macOS · Linux

SECRET CONTACT / 9H1SR73.

Greetings from Malta.

You found the station’s little secret. The best part of radio is the person on the other side of the signal.

− − · · ·   · · · − −
CQ DE 9H1SR / JM75fv