A Guide to SDRcom Pro

The SDR that works with most everything

What SDRcom Pro is, in one paragraph

SDRcom Pro is a fully-featured software-defined-radio (SDR) receiver that you operate through a web browser — or, if you prefer, as a downloadable desktop application. It turns a low-cost USB receiver dongle into a powerful, modern radio: you tune across the spectrum, listen in every common mode, watch signals on high-resolution waterfalls, decode digital modes and aircraft transmissions, and let an intelligent scanner find and follow activity for you. SDRcom Pro is the full edition of the SDRcom receiver. A lighter "Lite" version lives free inside HamDash; SDRcom Pro is the complete product, with much more built in. It runs on virtually any computer because it is built on open web technology, and it is designed — as its tagline says — to work with most everything.

This guide is the complete, authoritative reference for SDRcom Pro. It begins with the simplest possible starting point — opening the receiver — and works outward through every part of the program: the ways you can run it, the receiver faceplate, every mode and control, the intelligent scanner and its bird-named "personalities," the aircraft decoder, the digital decoders, the recorder, the signal-intelligence tools, and the wider family of SDRcom editions. You do not need to read it front to back; use the contents to jump to what you need.

The big picture: what SDRcom Pro is and how it is delivered
The two ways to run SDRcom Pro
- Browser edition (WebUSB)
- Downloadable desktop edition (the binary)
What you need: hardware and antenna
Getting started: your first listen
The receiver, part by part
The intelligent band scanner and its personalities
Aircraft decoding: the W4PAH ADS-B engine
Digital decoders: FT8, FT4, and more
Signal-intelligence tools
The SDRcom family: Red, Network, Blue — and how Pro fits
Pricing and licensing
How SDRcom Pro compares to the free Lite edition
Where SDRcom Pro sits in the radio world
Frequently asked questions
Glossary

1. The big picture: what SDRcom Pro is and how it is delivered

SDRcom Pro is a receiver — software that, paired with inexpensive receiving hardware, lets you listen to and analyse radio signals across a very wide frequency range. What sets it apart is the combination of three things:

It is genuinely fully-featured. Beyond simply tuning and listening, SDRcom Pro decodes aircraft transmissions in a rich 3-D display, decodes digital modes, offers an intelligent scanner that finds and holds signals for you, processes audio with a multi-band noise-reduction equaliser, records off-air audio on a schedule, and shows signal-intelligence about what you are hearing.
It runs almost anywhere. SDRcom Pro is built on open web technology. The browser edition runs in any Chromium-based browser, on any operating system. The downloadable desktop edition extends this to receivers and setups that need a local helper application.
It works with most everything. SDRcom Pro is part of a family that, between its editions, can drive a plug-in USB dongle, listen through hundreds of remote internet receivers, or connect to higher-end desktop receivers. This guide focuses on SDRcom Pro itself — the edition built around your own RTL-SDR receiver — and explains the wider family in section 10.

2. The two ways to run SDRcom Pro

SDRcom Pro can be used in two delivery forms. They share the same receiver design and look and feel; they differ only in how the software reaches your radio hardware.

Browser edition (WebUSB)

This is the headline form of SDRcom Pro, and for most users it is all they will ever need.

Nothing to install. You open SDRcom.com and the receiver runs in your browser. There are no drivers to find, no software package to install, and nothing to keep updated separately.
It talks to your dongle through WebUSB. Modern browsers include a technology called WebUSB that lets a web page communicate directly with USB hardware. SDRcom Pro uses it to talk to your RTL-SDR receiver dongle. You plug in the dongle, grant permission once, and the browser drives the radio.
It is operating-system agnostic. Because the work is done by the browser, SDRcom Pro does not care what computer you have. It runs on Windows, macOS, and Linux equally. The only requirement is a Chromium-based browser — such as Google Chrome or Microsoft Edge — because those browsers implement WebUSB.
It works on Android, too. SDRcom Pro's browser edition runs on Android devices. You connect your RTL-SDR dongle to the Android device with a USB OTG ("On-The-Go") adapter, open SDRcom Pro in a Chromium browser, and it works plug-and-go. This means you can run a fully-featured SDR receiver from a phone or tablet in the field.
Use it anywhere. Because it is just a web address, you can run SDRcom Pro on any suitable machine you sit down at — your shack computer, a laptop, a tablet — provided you have your dongle and antenna with you.

In short: open a Chromium browser, go to the SDRcom site, plug in an RTL-SDR, and you have a full receiver — on Windows, Mac, Linux, or Android, with nothing installed.

Downloadable desktop edition (the binary)

For some setups you want a traditional installed application rather than a browser tab. SDRcom also offers a downloadable desktop edition — a packaged program (a "binary") you install on your computer.

Why a desktop edition exists. Browsers are deliberately limited in how they can reach certain hardware and local network services. Some receivers and some ways of connecting need a small local helper — a "sister" application running on your machine — that the browser cannot provide on its own. The desktop edition bundles the receiver together with the ability to talk to these local helpers, so it can communicate with local devices and services that the pure browser edition cannot.
What it unlocks. Through its sister applications, the desktop edition can connect to higher-end desktop receivers and locally-running receiver software on the same machine, opening up hardware beyond the plug-in USB dongle.
It bundles the whole family. The desktop application is not a cut-down build — it contains the full set of SDRcom receiver faces. A user who installs it gets the RTL-SDR receiver, the remote-network receiver, and the connections to local desktop receivers, all inside one application.
It still works offline where it counts. The desktop edition is designed so that core listening, the waterfalls, and the digital and aircraft decoders keep working even with no internet connection — the receiver itself does not depend on being online. (Some supplementary information panels that draw on public data will simply show "no data" until a connection is available, rather than pretending to be complete.)

Which should you choose? If you use an RTL-SDR dongle, the browser edition is the simplest and most flexible choice — nothing to install, runs everywhere. Choose the desktop edition when your setup needs to reach local desktop receivers or locally-running receiver software that a browser cannot talk to directly.

3. What you need: hardware and antenna

To use SDRcom Pro as a live receiver you need three things:

A receiver dongle. SDRcom Pro is built around the RTL-SDR — an inexpensive, widely-available USB receiver. Common versions such as the RTL-SDR V3 and V4 (based on the R820T2/R828D tuner family) are supported.
An antenna. Even a simple wire or the small antenna supplied with a dongle will receive signals; a better antenna receives better. The antenna connects to the dongle.
A device with a Chromium browser (for the browser edition) — Windows, Mac, Linux, or Android — or a computer on which to install the desktop edition.

If you do not yet own a dongle, the SDRcom and HamDash sites include guidance on buying a suitable RTL-SDR.

4. Getting started: your first listen

Connect your hardware. Plug the RTL-SDR dongle into your computer (or into an Android device via a USB OTG adapter) and connect your antenna to the dongle.
Open SDRcom Pro. In a Chromium-based browser, go to the SDRcom website and open the Pro receiver. (Or launch the desktop application if you are using that edition.)
Grant USB permission. The browser will ask once for permission to access the dongle. Approve it, and SDRcom Pro connects to the radio.
Start listening. SDRcom Pro starts with sensible defaults so a brand-new operator hears something straight away — for example, a popular voice or digital watch frequency is pre-set so the receiver is not silent on first run. From there, tune wherever you like.
Find activity fast. If you are not sure where to listen, the intelligent scanner (section 6) can sweep a band and lock onto activity for you.

5. The receiver, part by part

This section walks through the receiver faceplate and every control, working from the most basic outward.

Tuning and the VFO

The VFO (variable frequency oscillator) is simply the receiver's tuning. SDRcom Pro gives you several ways to tune:

A rotary tuning knob on screen that you can drag, mimicking the feel of a traditional radio dial.
Direct frequency entry, to jump straight to a known frequency.
Step buttons to move up and down in defined increments.
Click-to-tune on the waterfall — click a signal you can see on the spectrum display and the receiver tunes to it.

Modes

A "mode" is the way a signal is transmitted and therefore how it must be received. SDRcom Pro supports the full set of common listening and amateur modes, selectable side by side on the faceplate:

USB — upper sideband voice (single sideband; by convention used above 10 MHz).
LSB — lower sideband voice (single sideband; by convention used below 10 MHz).
AM — amplitude modulation (broadcast and some aviation/utility).
NFM — narrow FM (frequency modulation for local voice, repeaters, and utility channels).
WFM — wide FM (for wideband FM broadcast).
CW — continuous wave, used for Morse code.

You select the mode from the mode controls, and SDRcom Pro applies the appropriate filtering and processing for each.

The waterfalls and bandscope

A waterfall is a scrolling visual picture of the radio spectrum: frequency across the screen, time scrolling down, and signal strength shown as colour. It lets you see signals as well as hear them — a strong carrier, a busy band, a quiet patch — and click straight onto anything interesting.

High-resolution waterfalls (Pro). Where the free Lite edition has a basic waterfall, SDRcom Pro provides upgraded, high-resolution waterfalls with sharper detail and finer control over the noise floor and display range, so weak signals stand out and the picture is clearer.
The bandscope. The bandscope is the spectrum/waterfall display that shows the band around your tuned frequency.
A "traditional" faceplate option. SDRcom Pro also offers a classic desktop-SDR layout — the Trad waterfall faceplate — with manual control over the noise floor and range, for operators who prefer the look and feel of conventional SDR software.

An important design rule: SDRcom keeps each receiver's waterfall separate and deliberate. The displays are tuned to each use rather than forced into one global style — part of the program's careful, stability-first engineering.

The S-meter

The S-meter shows received signal strength — the radio equivalent of a level meter. SDRcom Pro includes clear, readable signal-strength metering so you can judge how strong a station is and compare signals.

Gain, AGC, and overload handling

Gain controls how much the receiver amplifies incoming signals. Too little and weak signals are lost; too much and strong signals distort.
AGC (automatic gain control) adjusts gain automatically to keep audio at a comfortable level as signals rise and fall.
Overload protection. Strong nearby signals (for example, a powerful broadcast transmitter) can overload a receiver. SDRcom Pro includes intelligent handling that detects overload and backs the front-end gain off automatically to keep reception clean — a refinement that matters greatly when listening near strong signal sources.

Bandwidth and filtering

Bandwidth is how wide a slice of spectrum the receiver listens to around your tuned frequency. A narrow bandwidth rejects interference from adjacent signals; a wide bandwidth captures the full fidelity of a broadcast. SDRcom Pro provides preset narrow and wide bandwidth choices appropriate to each mode, plus the ability to set what you need, so you can isolate a weak voice in a crowded band or open up for a clean broadcast.

Noise reduction and the equaliser

SDRcom Pro includes a four-band DSP noise-reduction equaliser — an advanced audio-processing chain that both reduces noise and lets you shape the audio across multiple bands. This is one of the clearest upgrades over the free Lite edition, and it makes a real difference when pulling a weak or noisy signal out of the background. The equaliser is part of SDRcom Pro's advanced audio/DSP processing.

Memory banks

Memories store your favourite frequencies so you can return to them instantly.

The free Lite edition offers 5 banks of 10 slots — 50 memories.
SDRcom Pro offers enhanced memories: 1000 slots — 100 banks of 10 — each storing frequency and mode, with quick jump-to-bank navigation, saved in your browser so they persist between sessions. A built-in memory bank browser lets you find and recall stored frequencies easily.

The recorder and scheduler

SDRcom Pro includes a WAV recorder with a scheduler. You can record received audio to standard WAV files, and you can schedule recordings to start and stop automatically — useful for capturing a net, a broadcast, or activity on a frequency while you are away.

Diagnostics overlay

A diagnostics overlay is available to show technical detail about what the receiver is doing — helpful for fine-tuning a difficult setup or understanding performance.

6. The intelligent band scanner and its personalities

One of SDRcom Pro's signature features is its intelligent, band-aware scanner. This is not a simple frequency-stepping scanner. Instead of clicking blindly from channel to channel, it monitors the whole received bandwidth at once, finds where the activity actually is, and locks onto a real signal — then decides, intelligently, how long to stay and when to move on.

You do not tell it exact frequencies to scan. You tell it how you want it to behave — how eager it should be to chase new activity versus how loyally it should stick with a signal it has found. These behaviours are pre-set as named "personalities," and each personality is named after a bird whose hunting style matches its behaviour. This makes a sophisticated piece of signal processing easy and intuitive to choose between.

There are five personalities, listed here from the most restless to the most loyal:

Swift — rapid survey. Skims across the band quickly to give you a fast picture of where activity is, while still pausing on a genuine exchange rather than chattering past everything. Best when you want to know what is happening across a whole band in a hurry.
Falcon — agile (the default). Aggressively chases new activity and swaps to a new signal quickly when something more active appears. Best for hunting the liveliest action and never sitting on a dead frequency for long. This is the default personality.
Kestrel — balanced. Follows a conversation but will swap to a different signal if a clearly stronger one appears. A sensible middle ground between chasing and holding. Best for general monitoring.
Heron — patient. Holds firmly onto the signal it has, and will only swap if a rival signal is much stronger. Best when you have found something worth following and do not want the scanner darting away at every passing burst.
Owl — loyal. Sticks with a signal — even a weak one — until it falls silent, then looks for the next. The most patient, "hold until it ends" behaviour. Best for following a single weak or intermittent station to the end of its activity.

Each personality differs in how strong a signal must be before it locks, how long it waits to be sure a signal is real, how much stronger a rival must be before it switches, how quickly it loses interest once a signal weakens, and how it favours brand-new activity over what it is already hearing. You simply pick the bird whose style suits what you are trying to do, and the scanner does the rest.

The scanner is a Pro feature. It is not included in the free Lite edition.

7. Aircraft decoding: the W4PAH ADS-B engine

SDRcom Pro includes the W4PAH ADS-B engine — a built-in decoder for the transmissions that aircraft broadcast about themselves. ADS-B (Automatic Dependent Surveillance–Broadcast) is the system by which aircraft continually transmit their identity, position, altitude, and speed. With a suitable antenna, SDRcom Pro receives and decodes these transmissions and shows you the aircraft around you.

It is far more than a list of contacts. The ADS-B engine provides:

An aircraft table — the decoded aircraft with their details (type, description, operator, registration, altitude, speed, and identifying codes).
A live map — aircraft plotted geographically, so you can see the traffic around your location.
A "bird's-eye" radar view — a mini radar-style plot centred on you.
A 3-D sky-dome / aircraft-positioning view — aircraft shown in three dimensions in the sky around your station, including a third-person camera perspective and a 3-D tracking environment.
Matching to aircraft information — decoded signals are matched to aircraft data so you see what each aircraft actually is, not just a code.
A decode meter — showing how well the engine is decoding.

This makes SDRcom Pro not only a listening receiver but a genuine aircraft-tracking instrument. ADS-B decoding is a Pro feature and is not part of the free Lite edition.

8. Digital decoders: FT8, FT4, and more

SDRcom Pro decodes popular weak-signal digital modes directly, using clean-room decoders developed under the W4PAH name (meaning they are original implementations, not borrowed code).

FT8 (the W4PAH FT8 decoder). FT8 is an extremely sensitive digital mode that can be decoded even when a signal is far too weak to hear by ear. SDRcom Pro decodes FT8 in real time. (The free Lite edition also includes FT8 decoding.)
FT4 (the W4PAH FT4 decoder). FT4 is a faster cousin of FT8. SDRcom Pro adds FT4 decoding, which the Lite edition does not include.
CW. SDRcom Pro supports the CW (Morse) mode for listening to Morse activity.
A reception globe. Decoded digital activity can be visualised on a 3-D reception globe, showing where signals are coming from and going to — a vivid picture of propagation in action.

These decoders work locally on your own received signal. Where the wider community's reception data is available, it can enrich the picture — but the decoders themselves do not depend on being online.

9. Signal-intelligence tools

SDRcom Pro includes a Signal Intelligence panel that adds context to what you are hearing — helping you identify and understand signals rather than just listen to them. This includes intelligence about stations and, for certain ranges such as the VHF airband, contextual information drawn from public aviation data. The aim is to turn raw reception into understanding: not just "a signal on this frequency," but what it is likely to be. Signal-intelligence tooling is a Pro feature.

10. The SDRcom family: Red, Network, Blue — and how Pro fits

SDRcom Pro is one member of a family of receiver editions that share the same look, feel, and core receiver design but connect to different kinds of radio. Understanding the family helps you see exactly where Pro fits.

SDRcom Red — your own RTL-SDR. This is the family Pro belongs to: the receiver driven by your own plug-in RTL-SDR dongle over WebUSB. It comes in two editions:
- Red Lite — the free version that lives inside HamDash. Full of features, but deliberately lighter.
- Red Pro — this product, SDRcom Pro — the complete, fully-featured edition.
SDRcom Network — hundreds of remote receivers. A subscription edition that connects, over the internet, to a large worldwide network of remote receivers spread across six continents. You listen on a distant radio as if it were your own — ideal when you want to hear how a band sounds from the other side of the world, or when you cannot put up an antenna yourself.
SDRcom Blue — higher-end desktop receivers. A desktop edition that connects to SDRplay® desktop receivers through locally-installed receiver software. This is where the downloadable desktop application comes in: it bundles the receiver faces together so that, in one installed program, an owner can use a plug-in dongle, point at remote network receivers, and connect to a local desktop receiver.

How Pro fits: SDRcom Pro is the full edition of the Red (RTL-SDR) receiver. If you own an inexpensive RTL-SDR dongle, SDRcom Pro is the product for you — and the browser edition needs nothing installed at all. The other editions exist for those who want to listen through the global network or connect higher-end desktop hardware.

11. Pricing and licensing

SDRcom Pro (Red Pro) is a one-time payment of $9.99 for a one-year licence. There is no automatic renewal — your licence simply runs for the year.
SDRcom Network is a subscription at $9.99 per month, reflecting the cost of running and maintaining access to the worldwide receiver network.
SDRcom Blue (the SDRplay®-compatible desktop edition) is a one-time payment of $24.99.
Red Lite — the version inside HamDash — is free.

When you buy the desktop application built around Blue, you receive the other receiver faces (the RTL-SDR receiver, the network receiver, and the local-desktop connection) unlocked inside the same installed program.

Pricing is stated here for reference; always confirm current pricing on the SDRcom website. SDRcom Pro is a receiver only — it does not transmit.

12. How SDRcom Pro compares to the free Lite edition

If you have used the free SDR receiver inside HamDash, you have used Red Lite. Here is exactly what stepping up to SDRcom Pro adds. Both editions share the core mode set (USB, LSB, AM, NFM, WFM, CW tuning), FT8 decoding, memory banks, and the diagnostics overlay. SDRcom Pro adds:

W4PAH ADS-B aircraft decoding — table, live map, bird's-eye radar, and the full 3-D sky-dome / third-person tracking views.
The intelligent band scanner with its five personality presets (Swift, Falcon, Kestrel, Heron, Owl).
W4PAH FT4 decoding (in addition to FT8).
Enhanced memories — 1000 slots (100 banks × 10) with frequency and mode and jump-to-bank navigation, versus 50 in Lite.
Upgraded high-resolution waterfalls (two Pro variants) versus the basic Lite waterfall.
The traditional waterfall faceplate — classic desktop-SDR layout with manual floor and range.
The four-band DSP noise-reduction equaliser and advanced audio/DSP processing.
Band profiles and utility presets.
The WAV recorder and scheduler.
The Signal Intelligence panel.

In short, Red Lite is a complete and enjoyable receiver for everyday listening; SDRcom Pro is the full instrument, for those who want to decode aircraft, scan intelligently, pull weak signals out of noise, record, and analyse.

Ready to hear it for yourself? Head to SDRcom.com, plug in your RTL-SDR, and the full Pro receiver opens straight in your browser — no install, no fuss.

13. Where SDRcom Pro sits in the radio world

SDRcom Pro occupies a deliberate and distinctive place among SDR receiver programs.

It is delivered instantly, with nothing to install. Most capable SDR software must be downloaded, installed, and configured, with drivers and dependencies to manage. SDRcom Pro's browser edition runs the moment you open a web page, and works on Windows, Mac, Linux, and Android alike. This "switch it on and it works" delivery is its biggest structural advantage.
It works with most everything. Between its editions, the SDRcom family drives a plug-in dongle, listens through hundreds of remote network receivers, or connects to higher-end desktop receivers — and the desktop application brings these together in one program. Few receiver programs span this range.
Its advanced features are original. The ADS-B engine, the FT8 and FT4 decoders, and the intelligent scanner are SDRcom's own work, built cleanly rather than assembled from borrowed parts. That originality is the heart of what makes SDRcom Pro distinct.
It is approachable. Sophisticated capability is made easy to use — most visibly in the scanner, where complex signal-processing behaviour is offered as five intuitive, bird-named personalities you simply choose between.
It connects to a free on-ramp. The free Red Lite edition inside HamDash lets anyone try SDR listening at no cost, and SDRcom Pro is the natural next step for those who want the full experience.

14. Frequently asked questions

Do I need to install anything to use SDRcom Pro? For the browser edition, no — open it in a Chromium-based browser (Chrome or Edge) and plug in your dongle. For the desktop edition, you install the application.
What operating systems does it run on? The browser edition runs on Windows, macOS, Linux, and Android. The desktop edition is an installed application for the desktop.
Why a Chromium-based browser? Because SDRcom Pro talks to your USB dongle using WebUSB, which Chromium-based browsers (such as Chrome and Edge) implement.
Can I really use it on a phone? Yes — on Android, connect an RTL-SDR via a USB OTG adapter and open SDRcom Pro in a Chromium browser. It works plug-and-go.
What hardware do I need? An RTL-SDR dongle (such as V3 or V4) and an antenna. SDRcom Pro is a receiver and does not transmit.
What is the difference between SDRcom Pro and the free receiver in HamDash? The HamDash receiver is Red Lite (free, lighter). SDRcom Pro is the full edition — adding ADS-B aircraft decoding, the intelligent scanner, FT4, enhanced memories, high-resolution waterfalls, advanced noise reduction, recording, and signal intelligence. See section 12.
Does the licence auto-renew? No. Red Pro is a one-time $9.99 payment for a one-year licence with no auto-renewal.
Does it work offline? The receiver, waterfalls, and the digital and aircraft decoders work without an internet connection. Some supplementary information panels that draw on public data will simply show no data until you are online, rather than presenting an incomplete picture as if it were complete.

15. Glossary

ADS-B — Automatic Dependent Surveillance–Broadcast; the signals aircraft transmit giving their identity, position, altitude, and speed.
AGC — automatic gain control; keeps audio level steady as signal strength changes.
Bandwidth — the width of the slice of spectrum the receiver listens to around the tuned frequency.
Bandscope — the spectrum/waterfall display around the tuned frequency.
CW — continuous wave; the mode used for Morse code.
FT8 / FT4 — sensitive weak-signal digital modes; FT4 is the faster variant.
Mode (USB/LSB/AM/NFM/WFM/CW) — the way a signal is transmitted and must be received: upper and lower sideband voice, amplitude modulation, narrow FM, wide FM, and continuous-wave Morse.
RTL-SDR — an inexpensive USB software-defined-radio receiver dongle.
SDR (software-defined radio) — a radio whose tuning and processing are performed in software.
S-meter — a meter showing received signal strength.
USB OTG (On-The-Go) — an adapter that lets an Android device connect to USB hardware such as an RTL-SDR.
VFO — variable frequency oscillator; the receiver's tuning.
Waterfall — a scrolling visual display of the spectrum, with signal strength shown as colour over time.
WebUSB — a browser technology that lets a web page communicate directly with USB hardware, with nothing to install.

This guide describes SDRcom Pro as a complete, feature-stable product. The browser edition runs in any Chromium-based browser on Windows, Mac, Linux, and Android with nothing to install; the desktop edition adds connections to local devices and higher-end receivers. SDRcom Pro is a receiver and does not transmit. Open it any time at SDRcom.com.