Redefining the SDR radio experience.

OLLITER | OL-Master

The Vision

OL-Master is the result of an extensive technical journey driven by experimentation, curiosity, and a profound respect for radio engineering.

OL-Master: SDR Evolution

Born in 2010 as personal research, OL-Master is now a mature platform that transcends entry-level solutions. A concrete project, built on real hardware and signals, bridging the legacy of PowerSDR with a modern, professional architecture.

A Balanced Ecosystem:

Stable Core: Hardware security and integrity.

Flexibility: Innovation via plugins and external tools.

OPEN Approach: Uncompromising quality and collaboration.

Born in 2010 as a personal research project, OL-Master has evolved into a mature platform designed to push performance and reliability beyond the limits of common amateur SDR solutions. From the beginning, the project has been shaped by a concrete approach: real hardware, real signals, and real-world operational constraints.

The platform is built on the open-source foundations of PowerSDR, respecting its technical heritage while evolving it toward a modern architecture.

Today, OL-Master supports high bandwidths, multiple receivers, and tight integration with professional-grade hardware, representing a balanced ecosystem:

Stable Core: Ensures security, high performance, and maximum hardware integrity.

Flexible Model: Designed to foster constant innovation through plugins, integrations, and external tools.

"OPEN" Approach: Community-oriented collaboration, maintaining high technical quality and long-term sustainability.

Sleek and intuitive interface

From extreme DX-peditions to pure shortwave listening, OL-Master redefines SDR management standards: a reliable, powerful, and fully customizable partner for the most demanding radio amateurs.

A clean and responsive interface, engineered for real-world operations, high-resolution displays, and advanced signal analysis—without unnecessary complications.

Interfaccia Singolo ricevitore

Interfaccia Semplificata

Olliter OL-Master Two Receivers Interface

Two (of four) receivers

Wide-band Interface

Seamless integration with Log software

Uncompromising Native Integration OL-Master eliminates the need for bridges or complex configurations by offering native compatibility with leading logging software, such as N1MM. This immediate and transparent synchronization transforms the software interface into a natural extension of your operational workflow.

Olliter OL-SDR N1MM seamless Integration of LOG

N1MM Spectrum Integration

OL-Master: Your Shack Command Center

Olliter OL-SDR Software Defined Radio Transceiver

An architecture where every plugin evolves in symbiosis with the system. This native integration eliminates conflicts and ensures absolute stability, redefining the standards of the radio station.

Intelligence and Simplicity

The synergy between OL-SDR and OL-Master eliminates the need for external interfaces and complex cabling. We have natively integrated features that previously required additional modules:

Native SO2R: Single Operator 2 Radio capabilities, ready out-of-the-box.

Total Control: Integrated management for antenna switching and professional keyers.

MQTT Protocol: Seamless integration with Stream Deck and modern control systems.

Interoperability: Direct connection with leading logging and contest software.

The "Minimal" Shack: Seven years of development to centralize every function and free your station from hardware clutter. Experience pure signal quality and total control.

OL-Master: Guided Open Source.

Under Olliter’s leadership, we merge collective innovation with industrial robustness.

A platform engineered for operational stability, signal quality, and long-term sustainability.

OL-Ecosystem: Empowering Shared Innovation

Join a dynamic network of enthusiasts and developers dedicated to the evolution of the OL-SDR platform. We provide comprehensive resources, detailed FAQs, and specialized tools for creating native plugins. This empowers you to actively contribute to a project where every idea becomes an integral part of a professional, borderless system.

OL-Master Core The Core includes all essential software components for the correct and safe operation of Olliter radio equipment, including:

Hardware control and device management.

Primary DSP processing for RX/TX.

Timing logic, synchronization, and safety protocols.

Official communication protocols between Olliter software and hardware.

Public APIs and relative reference implementations.

Key Features:

Maintained and released by the Olliter Core Team.

Versioned and tested against supported hardware.

Distributed under the GNU General Public License version 3 (GPLv3), in continuity with PowerSDR.

Subject to review, validation, and acceptance before inclusion in official releases. The Core represents the stable and supported foundation of the OL-Master ecosystem.

Plugins and External Components

Plugins and external components include optional or non-essential extensions, such as:

Additional decoders or signal processors.

UI extensions or alternative front-ends.

Integrations with third-party software or services.

Experimental or research-oriented features.

Key Features:

Developed and distributed independently from the Core.

Interact with the Core exclusively through documented public APIs.

May adopt different licensing models, provided they remain compatible with the Core's GPL license.

Can be maintained by individual developers, groups, or third parties.

This model enables innovation and customization without destabilizing the Core project.

2. Community Model OL-Master is open, yet structured.

The community plays a vital role in testing, experimentation, feedback, and extension development. At the same time, the integrity of the Core platform must be preserved to ensure long-term reliability and vitality.

Community members are encouraged to:

Explore and experiment with the platform.

Develop plugins and integrations.

Provide technical feedback and insights.

Propose improvements through established contribution workflows.

The acceptance of contributions into the Core is based on technical quality, architectural consistency, maintainability, and long-term impact.

3. Official Support Olliter provides official support for:

The OL-Master Core distributed through official channels.

Documented public APIs.

Plugins developed or certified by Olliter.

Supported hardware configurations using official firmware and software.

Forks, experimental builds, and community-driven plugins are permitted under the GPL license, but are not considered official and are not covered by Olliter support or compatibility guarantees.

5. Project Philosophy

The value of OL-Master lies in its ecosystem, not in exclusive control over the code.

Openness fosters collaboration and learning, while structure ensures stability, security, and sustainability.

OL-Master aims to balance both worlds—providing a solid technical foundation while welcoming a community of users and developers who share the same respect for engineering discipline and open-source principles.

OL-Master is released under the GNU General Public License version 3 (GPLv3).

Anyone who has received a copy of OL-Master, whether together with Olliter hardware or from another person, can obtain the complete Corresponding Source free of charge by writing to hello@olliter.com, as described in the FAQ below.

As the project evolves, public repositories may be made available once documentation, contribution workflows, and long-term maintenance processes have been fully established.

Is OL-Master open source? ▼

Yes. OL-Master is released under the GNU General Public License version 3 (GPLv3), in continuity with its origins in the PowerSDR ecosystem.

The full license text is available at gnu.org/licenses/gpl-3.0.html and is included with every OL-Master installation.

Is OL-Master derived from PowerSDR? ▼

Yes. OL-Master originated from the PowerSDR codebase and has evolved significantly over time through extensive modifications, refactoring, and architectural redesign. This heritage is respected both technically and legally.

How can I obtain the source code? ▼

Anyone who has received a copy of OL-Master, whether together with Olliter hardware or from another person, can obtain the complete Corresponding Source of the release they have, free of charge, by writing to hello@olliter.com.

This offer is valid for at least three years from the date you received the software, and in any case for as long as Olliter offers spare parts or customer support for the related product model. To help us respond quickly, please indicate the OL-Master version you have and how you obtained it (for example, the serial number of your radio).

The source we provide includes our modifications and everything needed to build, install and run the software, together with the third-party libraries it depends on (such as WDSP, ChannelMaster, FFTW and PortAudio).

Why isn't there a public repository yet? ▼

OL-Master is evolving toward broader public distribution. Before opening public repositories, Olliter prioritizes:

clear documentation
defined contribution workflows
long-term maintainability

This ensures that openness leads to meaningful collaboration rather than fragmentation. In the meantime, the source code remains available on request to everyone entitled to it under the GPL (see "How can I obtain the source code?").

Can I fork OL-Master? ▼

Yes. The GPL explicitly permits forking.

However:

forks are independent projects
Olliter provides no support or compatibility guarantees for forks
Olliter trademarks and branding cannot be used in ways that imply endorsement

Can I develop plugins or extensions? ▼

Yes. Plugins and external components are the preferred way to extend OL-Master.

Plugins should:

use only documented public APIs
avoid modifying the Core directly
clearly declare their license and compatibility

Can I use OL-Master commercially? ▼

Yes. The GPLv3 permits commercial use, sale and redistribution of OL-Master, provided that the people who receive it get the same GPL rights, including access to the complete Corresponding Source, and that the licenses of the included third-party components are respected.

Olliter trademarks, names and branding are not licensed under the GPL and may not be used without permission.

For agreements involving Olliter hardware, support, or certification, contact Olliter directly.

Does Olliter restrict software redistribution? ▼

No. Redistribution is governed by the GPL.

Olliter defines what is considered an official release and what is supported, but does not restrict the rights granted by the license.

How can I contribute to the project? ▼

Community members can contribute through: