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Revision as of 20:06, 24 October 2026

SimTX Wiki

SimTX is a shared radio simulation. You set up virtual stations, transmit audio and listen with an SDR program. Distance, antennas and radio conditions change what listeners hear.

Getting started

Getting Started: install the app, sign in, create a station, transmit and listen.

User guides

Transmitting and Receiving: the Transmit and Receive tabs.
Stations: your stations, antennas and radios.
Satellites: launch a satellite, follow its passes and deorbit it.
Rotators and tracking: turn an antenna or follow a satellite.
Map and coverage: the globe, station lists and coverage maps.
Catalog and add-ons, Health, Settings and shortcuts and Troubleshooting.

All guides are listed on SimTX Guide.

For developers

The SimTX API reference documents the account service and the game protocol, message by message. Start with the quick start.

Learn in order

Find your way around: the Transmit tab's controls and meters. The Java transmitter's window is described on Transmitter Interface.
Choose what to send: play a file, use a microphone, or send a stream.
Change frequency and coverage: choose and adjust an antenna, then learn why reception changes.
Add features: install modes, audio processors, tools, and themes without writing code.
Receive: listen with any SDR program.

Annotated window of the older Java transmitter showing station settings, radio settings, audio source, antenna, Start TX, and session controls. — The older Java transmitter (version 0.3.6).

Find a specific answer

Nothing happens or no sound? See Troubleshooting, or Troubleshooting for the Java transmitter.
Which radio mode should I choose? See Modulation Modes.
How do I save or share my station setup? See Stations and Extension catalog. For the Java transmitter, see Station Configuration.
What do SWR, bandwidth, and IQ mean? See Radio terms.
Looking for formulas or the Lua API? See the documentation index.

Community and other ways to use SimTX

Community radio stations: stations described by their operators.
SDR Console, digital television reception, digital television transmission, How to receive and DRM transmission: additional community guides.
Download the desktop app
Download the Java transmitter
SimTX website
SimTX Discord

@@ Line 3: / Line 3: @@
 <span style="font-size:180%;">SimTX Wiki</span>
-'''SimTX is a shared radio simulation.''' Set up a virtual transmitter, send audio, and listen with a receiver. No physical radio or antenna is needed. Distance, antennas, and radio conditions affect what listeners hear.
+'''SimTX is a shared radio simulation.''' You set up virtual stations, transmit audio and listen with an SDR program. Distance, antennas and radio conditions change what listeners hear.
 </div>
 == Getting started ==
-'''[[Getting Started|Install SimTX and make your first transmission]]'''. The guide covers installation, sign-in, choosing a server, your first station, a first transmission and listening.
+'''[[Getting Started]]''': install the app, sign in, create a station, transmit and listen.
 == User guides ==
-How the main parts of the desktop app work, step by step:
+* '''[[SimTX Guide/Transmitting|Transmitting]]''' and '''[[SimTX Guide/Receiving|Receiving]]''': the Transmit and Receive tabs.
-* '''[[SimTX Guide/Stations|Stations]]''': the place you transmit and receive from, with its antennas and radios.
+* '''[[SimTX Guide/Stations|Stations]]''': your stations, antennas and radios.
-* '''[[SimTX Guide/Satellites|Satellites]]''': design and launch your own satellite, follow its passes, and deorbit it.
+* '''[[SimTX Guide/Satellites|Satellites]]''': launch a satellite, follow its passes and deorbit it.
-* '''[[SimTX Guide/Rotators and tracking|Rotators and tracking]]''': turn an antenna by hand or let it follow a satellite.
+* '''[[SimTX Guide/Rotators and tracking|Rotators and tracking]]''': turn an antenna or follow a satellite.
+* '''[[SimTX Guide/Map and coverage|Map and coverage]]''': the globe, station lists and coverage maps.
+* '''[[SimTX Guide/Catalog and add-ons|Catalog and add-ons]]''', '''[[SimTX Guide/Health|Health]]''', '''[[SimTX Guide/Settings and shortcuts|Settings and shortcuts]]''' and '''[[SimTX Guide/Troubleshooting|Troubleshooting]]'''.
 All guides are listed on [[SimTX Guide]].
@@ Line 21: / Line 23: @@
 == Learn in order ==
-# '''[[Getting Started|Install and transmit]]''': follow one complete example from an empty desktop to your first TX session.
+# '''[[SimTX Guide/Transmitting|Find your way around]]''': the Transmit tab's controls and meters. The Java transmitter's window is described on [[Transmitter Interface]].
-# '''[[Transmitter Interface|Find your way around]]''': identify the controls and understand the meters.
 # '''[[Transmission Sources|Choose what to send]]''': play a file, use a microphone, or send a stream.
 # '''[[Antenna System|Change frequency and coverage]]''': choose and adjust an antenna, then learn [[Propagation Basics|why reception changes]].
 # '''[[Lua extensions|Add features]]''': install modes, audio processors, tools, and themes without writing code.
-# [[How to receive|'''Start to receiving''']]: receiving signals and stations using any [[wikipedia:Software-defined_radio|SDR]] app.
+# '''[[How to receive|Receive]]''': listen with any [[wikipedia:Software-defined_radio|SDR]] program.
 [[File:SimTX-0.3.6-first-transmission-guide-clean.png|thumb|center|850px|alt=Annotated window of the older Java transmitter showing station settings, radio settings, audio source, antenna, Start TX, and session controls.|The older Java transmitter (version 0.3.6).]]
 == Find a specific answer ==
-* '''Nothing happens or no sound?''' Use [[Troubleshooting]].
+* '''Nothing happens or no sound?''' See [[SimTX Guide/Troubleshooting|Troubleshooting]], or [[Troubleshooting]] for the Java transmitter.
 * '''Which radio mode should I choose?''' See [[Modulation Modes]].
-* '''How do I save or share my station setup?''' See [[Station Configuration]] and [[Extension catalog]].
+* '''How do I save or share my station setup?''' See [[SimTX Guide/Stations|Stations]] and [[Extension catalog]]. For the Java transmitter, see [[Station Configuration]].
 * '''What do SWR, bandwidth, and IQ mean?''' See [[Radio terms]].
-* '''Looking for formulas or an API?''' Open the [[Documentation|complete documentation index]], including antenna calculations and every Lua API reference.
+* '''Looking for formulas or the Lua API?''' See the [[Documentation|documentation index]].
 == Community and other ways to use SimTX ==