Advanced Transmitter Settings - Revision history

Clanker: Tighten; problems as a table

2026-10-24T20:06:19Z

Tighten; problems as a table

← Older revision		Revision as of 20:06, 24 October 2026
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	Fifteen parameters define a transmitter's imperfections. In the SimTX desktop app they are set in two places:		Fifteen parameters define a transmitter's imperfections. In the SimTX desktop app they are set in two places:
	* '''On a station's radio.''' Each radio stores all fifteen under '''Transmitter imperfections''' in the station editor. Choosing a model under '''Based on''' fills them~~; you can change any of them afterwards~~. See [[SimTX Guide/Stations#Radios\|Radios]].		* '''On a station's radio.''' Each radio stores all fifteen under '''Transmitter imperfections''' in the station editor. Choosing a model under '''Based on''' fills them. See [[SimTX Guide/Stations#Radios\|Radios]].
	* '''For one transmission.''' In the '''Transmit''' tab, '''Transmitter imperfections''' in the '''RF signal''' section adjusts four of them: Final drive, Compressor, Freq error and AM index. They start from the station radio's values. The other eleven ~~always~~ come from the radio.		* '''For one transmission.''' In the '''Transmit''' tab, '''Transmitter imperfections''' in the '''RF signal''' section adjusts four of them: Final drive, Compressor, Freq error and AM index. They start from the station radio's values. The other eleven come from the radio.

	== ~~When~~ to ~~open this panel~~ ==		== Which setting to change ==
	~~These controls are optional for first use. Begin with~~ a [[Radio Presets\|radio model]] and change one value at a time while listening to your own transmission.		Start from a [[Radio Presets\|radio model]] and change one value at a time while listening to your own transmission.
			{\| class="wikitable"
			! Problem !! Settings
			\|-
			\| Distorted audio \|\| The source's '''Audio gain''' first, then Final drive, Compressor and PA headroom.
			\|-
			\| Signal off the dial frequency \|\| Freq error.
			\|-
			\| An imperfect radio on purpose \|\| Hum, noise, leakage and the mode-specific settings.
			\|}

	* '''Distorted audio:''' first check source Audio Gain. Then examine Final drive, Compressor, and PA headroom.		PA means power amplifier. Headroom is the margin before it saturates. Carrier leak, sideband suppression, hum level, TX noise and phase noise are in decibels below the wanted signal: a larger number means a cleaner transmitter.
	* '''Frequency shifted from the dial:''' check Freq error.
	* '''Deliberately simulating an imperfect radio:''' use the hum, noise, leakage, and mode-specific controls.

	PA means power amplifier. Headroom is the margin before it saturates. ~~A higher~~ suppression ~~value means less unwanted signal~~, ~~not more. The full table retains every range~~ and ~~default~~.

	== Parameter reference ==		== Parameter reference ==
Line 48:		Line 53:
	\| CW rise (ms) \|\| 5.0 \|\| 0 to 50 \|\| CW keying envelope rise time. Very short values cause key clicks.		\| CW rise (ms) \|\| 5.0 \|\| 0 to 50 \|\| CW keying envelope rise time. Very short values cause key clicks.
	\|}		\|}

	~~Other bounds: frequency must be positive, power must be at least 0 W, and the duty cycle used by the amplifier model runs from 0 to 1 with a default of 0.5.~~

	The suppression-style values (carrier leak, sideband suppression, hum level, TX noise, phase noise) are expressed as decibels below the wanted signal, so larger numbers always mean a cleaner transmitter.

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

Clanker: Where the settings live in the SimTX desktop app

2026-10-24T19:42:42Z

Where the settings live in the SimTX desktop app

← Older revision		Revision as of 19:42, 24 October 2026
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	{{Documentation navigation}}		{{Documentation navigation}}

	~~The advanced settings panel (~~'''~~Show advanced transmitter settings~~''' in the ~~RF Signal section) exposes fifteen parameters that define the transmitter~~'~~s imperfections~~. [[~~Radio Presets~~]] ~~fill all~~ of them ~~at once; manual edits are possible afterwards~~.		Fifteen parameters define a transmitter's imperfections. In the SimTX desktop app they are set in two places:
			* '''On a station's radio.''' Each radio stores all fifteen under '''Transmitter imperfections''' in the station editor. Choosing a model under '''Based on''' fills them; you can change any of them afterwards. See [[SimTX Guide/Stations#Radios\|Radios]].
			* '''For one transmission.''' In the '''Transmit''' tab, '''Transmitter imperfections''' in the '''RF signal''' section adjusts four of them: Final drive, Compressor, Freq error and AM index. They start from the station radio's values. The other eleven always come from the radio.

	== When to open this panel ==		== When to open this panel ==
	These controls are optional for first use. Begin with a [[Radio Presets\|radio ~~preset~~]] and change one value at a time while listening to your own transmission.		These controls are optional for first use. Begin with a [[Radio Presets\|radio model]] and change one value at a time while listening to your own transmission.

	* '''Distorted audio:''' first check source Audio Gain. Then examine Final drive, Compressor, and PA headroom.		* '''Distorted audio:''' first check source Audio Gain. Then examine Final drive, Compressor, and PA headroom.

Clanker: Rework documentation for new users: illustrated steps, clear navigation, preserved technical references, and current 0.3.6 behavior

2026-09-13T21:24:28Z

Rework documentation for new users: illustrated steps, clear navigation, preserved technical references, and current 0.3.6 behavior

@@ Line 3: / Line 3: @@
 The advanced settings panel ('''Show advanced transmitter settings''' in the RF Signal section) exposes fifteen parameters that define the transmitter's imperfections. [[Radio Presets]] fill all of them at once; manual edits are possible afterwards.
 {| class="wikitable mw-collapsible mw-collapsed"
 ! Setting !! Default !! Range !! Effect
@@ Line 42: / Line 52: @@
 [[Category:SimTX]]

Clanker: Rework documentation for new users: illustrated steps, clear navigation, preserved technical references, and current 0.3.6 behavior

2026-09-13T21:21:40Z

Rework documentation for new users: illustrated steps, clear navigation, preserved technical references, and current 0.3.6 behavior

← Older revision		Revision as of 21:21, 13 September 2026
Line 1:		Line 1:
			{{Documentation navigation}}

	The advanced settings panel ('''Show advanced transmitter settings''' in the RF Signal section) exposes fifteen parameters that define the transmitter's imperfections. [[Radio Presets]] fill all of them at once; manual edits are possible afterwards.		The advanced settings panel ('''Show advanced transmitter settings''' in the RF Signal section) exposes fifteen parameters that define the transmitter's imperfections. [[Radio Presets]] fill all of them at once; manual edits are possible afterwards.

	{\| class="wikitable"		{\| class="wikitable mw-collapsible mw-collapsed"
	! Setting !! Default !! Range !! Effect		! Setting !! Default !! Range !! Effect
	\|-		\|-
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	[[Category:SimTX]]		[[Category:SimTX]]
			These controls are optional for first use. Begin with a [[Radio Presets\|radio preset]] and change one value at a time while listening to your own transmission.

			* '''Distorted audio:''' first check source Audio Gain. Then examine Final drive, Compressor, and PA headroom.
			* '''Frequency shifted from the dial:''' check Freq error.
			* '''Deliberately simulating an imperfect radio:''' use the hum, noise, leakage, and mode-specific controls.

			PA means power amplifier. Headroom is the margin before it saturates. A higher suppression value means less unwanted signal, not more. The full table retains every range and default.

Clanker: Create advanced settings page

2026-07-05T08:43:49Z

Create advanced settings page

New page

The advanced settings panel ('''Show advanced transmitter settings''' in the RF Signal section) exposes fifteen parameters that define the transmitter's imperfections. [[Radio Presets]] fill all of them at once; manual edits are possible afterwards.

{| class="wikitable"
! Setting !! Default !! Range !! Effect
|-
| Final drive (dB) || 0.0 || -40 to 40 || Extra drive into the power amplifier. Positive values push the amplifier toward compression and distortion.
|-
| PA headroom (dB) || 12.0 || 0.1 to 40 || How far below amplifier saturation the nominal signal sits. Small headroom means the signal clips early.
|-
| Compressor (dB) || 1.5 || 0 to 30 || Audio compression before modulation. Raises average loudness at the cost of naturalness.
|-
| PA softness || 2.8 || 0.5 to 10 || Shape of the amplifier limiting curve. Low values clip abruptly (harsh distortion), high values limit gently.
|-
| AM/PM (deg) || 6.0 || 0 to 45 || Phase shift that accompanies amplitude compression. Adds splatter and roughness when the amplifier is driven hard.
|-
| Carrier leak (dB) || 60.0 || 0 to 120 || Suppression of the residual carrier in suppressed-carrier modes. Higher is cleaner.
|-
| Sideband sup. (dB) || 60.0 || 0 to 120 || Suppression of the unwanted sideband in SSB. Higher is cleaner.
|-
| Freq error (Hz) || 0.0 || -10000 to 10000 || Static frequency offset of the transmitter oscillator.
|-
| Hum level (dB) || 120.0 || 0 to 120 || Mains hum suppression; 120 means no audible hum. Lower values add hum at the hum frequency.
|-
| Hum freq (Hz) || 0.0 || 0 to 400 || Mains hum fundamental (typically 50 or 100, or 60 or 120). Zero disables.
|-
| AM index || 0.85 || 0 to 1.2 || AM modulation depth. Above 1.0 is overmodulation with distortion and splatter.
|-
| PA sag (dB) || 0.0 || 0 to 30 || Supply voltage sag under load; produces a power dip on voice peaks and key-down.
|-
| TX noise (dB) || 120.0 || 0 to 160 || Broadband transmitted noise floor suppression. Higher is cleaner.
|-
| Phase noise (dB) || 120.0 || 0 to 160 || Oscillator phase noise suppression. Higher is cleaner; low values smear the signal spectrally.
|-
| CW rise (ms) || 5.0 || 0 to 50 || CW keying envelope rise time. Very short values cause key clicks.
|}

Other bounds: frequency must be positive, power must be at least 0 W, and the duty cycle used by the amplifier model runs from 0 to 1 with a default of 0.5.

The suppression-style values (carrier leak, sideband suppression, hum level, TX noise, phase noise) are expressed as decibels below the wanted signal, so larger numbers always mean a cleaner transmitter.

[[Category:SimTX]]