SimTX Transmitter - Revision history

Clanker: Remove internals wording

2026-07-05T08:55:26Z

Remove internals wording

← Older revision		Revision as of 08:55, 5 July 2026
Line 20:		Line 20:
	* [[Advanced Transmitter Settings]]: the fifteen fine-tuning parameters		* [[Advanced Transmitter Settings]]: the fifteen fine-tuning parameters
	* [[Station Configuration]]: callsign, location and saving station presets		* [[Station Configuration]]: callsign, location and saving station presets
	* [[Antenna System]]: how antennas are ~~modelled and~~ configured, with a page per antenna type		* [[Antenna System]]: how antennas behave and are configured, with a page per antenna type
	* [[Antenna Calculations]]: resonant lengths, SWR, gain and loss arithmetic		* [[Antenna Calculations]]: resonant lengths, SWR, gain and loss arithmetic
	* [[SWR and Transmitter Protection]]: what happens when the antenna is mismatched		* [[SWR and Transmitter Protection]]: what happens when the antenna is mismatched

Clanker: Remove internal modelling detail

2026-07-05T08:53:41Z

Remove internal modelling detail

← Older revision		Revision as of 08:53, 5 July 2026
Line 30:		Line 30:
	From the operator's point of view the simulation covers:		From the operator's point of view the simulation covers:
	* Transmitter imperfections: compression, distortion, carrier leakage, hum, phase noise and more, selectable through [[Radio Presets]] or tuned individually.		* Transmitter imperfections: compression, distortion, carrier leakage, hum, phase noise and more, selectable through [[Radio Presets]] or tuned individually.
	* ~~A physical antenna model~~: each antenna ~~is solved as real wire geometry at the operating frequency, producing~~ a radiation pattern, feedpoint impedance and SWR. Custom antennas can be imported as NEC decks, see [[NEC File Import]].		* Realistic antennas: each antenna type has a genuine radiation pattern, feedpoint impedance and SWR that change with frequency, size, height and orientation. Custom antennas can be imported as NEC decks, see [[NEC File Import]].
	* Amplifier thermodynamics: sustained transmission heats the finals, reduces output power and can permanently damage the amplifier, see [[Power Amplifier Behaviour]].		* Amplifier thermodynamics: sustained transmission heats the finals, reduces output power and can permanently damage the amplifier, see [[Power Amplifier Behaviour]].
	* Radio propagation between stations, including ionospheric effects, time of day and distance, see [[Propagation Basics]].		* Radio propagation between stations, including ionospheric effects, time of day and distance, see [[Propagation Basics]].

	[[Category:SimTX]]		[[Category:SimTX]]

Clanker: Create transmitter overview page

2026-07-05T08:41:20Z

Create transmitter overview page

New page

'''SimTX Transmitter''' is the operator client of the SimTX radio simulation platform. It lets a user configure a virtual radio station (callsign, location, transmitter, antenna) and transmit audio or data signals into a shared simulated radio spectrum hosted by a SimTX server. Receivers connected to the same server can tune to the transmission and hear it, subject to simulated antenna performance, propagation conditions and noise.

The transmitter does not emit real radio frequency energy. All modulation, amplifier behaviour and propagation are computed by the server; the client sends the station configuration and the source audio, and displays live measurements sent back by the server.

== Overview ==
A transmitter session works as follows:

# The operator starts the application and connects to a SimTX server (default port 5100).
# The station is configured: callsign, geographic location, frequency, power, modulation, transmission source and antenna.
# The operator presses '''Start TX'''. The server admits, queues or rejects the session depending on its session limits.
# While the session runs, the Radio Deck shows live measured values: forward and reflected power, SWR, ALC, amplifier temperature and audio buffer level.
# The session ends when the source finishes, the operator stops it, or the server ends it.

== Main topics ==
* [[Getting Started]]: installation, connecting to a server, first transmission
* [[Transmitter Interface]]: reference for every control in the application window
* [[Modulation Modes]]: supported modes and their bandwidths
* [[Transmission Sources]]: audio files, microphone, white noise, PipeWire, GNU Radio IQ
* [[Radio Presets]]: built-in transmitter characteristics, from clean lab exciters to overdriven CB rigs
* [[Advanced Transmitter Settings]]: the fifteen fine-tuning parameters
* [[Station Configuration]]: callsign, location and saving station presets
* [[Antenna System]]: how antennas are modelled and configured, with a page per antenna type
* [[Antenna Calculations]]: resonant lengths, SWR, gain and loss arithmetic
* [[SWR and Transmitter Protection]]: what happens when the antenna is mismatched
* [[Power Amplifier Behaviour]]: heating, power foldback and permanent damage
* [[Sessions and Queueing]]: admission, queue positions, rejections and kicks
* [[Propagation Basics]]: what determines whether a signal is heard at a distance

== What SimTX simulates ==
From the operator's point of view the simulation covers:
* Transmitter imperfections: compression, distortion, carrier leakage, hum, phase noise and more, selectable through [[Radio Presets]] or tuned individually.
* A physical antenna model: each antenna is solved as real wire geometry at the operating frequency, producing a radiation pattern, feedpoint impedance and SWR. Custom antennas can be imported as NEC decks, see [[NEC File Import]].
* Amplifier thermodynamics: sustained transmission heats the finals, reduces output power and can permanently damage the amplifier, see [[Power Amplifier Behaviour]].
* Radio propagation between stations, including ionospheric effects, time of day and distance, see [[Propagation Basics]].

[[Category:SimTX]]