DAX IQ Applet¶

Purpose¶

The DAX IQ applet provides per-channel DAX IQ stream controls: enable/disable each of four IQ streams, select a sample rate, and monitor real-time level. The applet is available when connected to a FLEX-8600 radio.

Accessing the DAX IQ Applet¶

Launch AetherSDR and connect to your FLEX-8600 radio.
Click the IQ tray button to open the DAX IQ applet.
Use the controls below to manage individual IQ streams.

Controls¶

Control	Label	Default	Valid Range	Notes
Toggle button	IQ 1–4 On/Off	Off	-	Click to enable or disable the IQ stream. Button text and style switch between "Off" and "On". Streams are per-session and not persisted by the radio.
Combo box	IQ 1–4 rate	48k	24k (24000), 48k (48000), 96k (96000), 192k (192000)	Select the sample rate for the IQ stream. Changing the rate emits `iqRateChanged(channel, rate)`. The combo box syncs back to the radio-reported rate when a stream is active.
Meter	IQ 1–4 meter	0	0–100 (scaled from RMS × 200)	Shows the RMS level of the IQ stream. Resets to 0 on disconnect, disable, or when the stream is not bound to a panadapter.

Behavior Details¶

Enabling/Disabling IQ Streams¶

Click the toggle button to switch a stream On or Off.
When enabling, the applet applies the currently selected sample rate to the radio stream. If you changed the rate while the stream was off, that rate is used when enabling.
When disabling, the meter resets to 0 and the button shows Off.

Sample Rate Selection¶

The combo box holds your intended rate. When a stream is active and not rate-settling, the combo box syncs to the radio-reported rate.
During rate-settling (when the radio is applying a new rate), the combo box preserves your selection until the stream rate stabilizes.
When a stream is disabled, the combo box retains the rate you selected, ready for the next enable.

Meter Behavior¶

The meter shows the RMS level of the IQ stream only when the stream is actively bound to a panadapter.
If the stream is off, or if it is enabled but not bound to a panadapter (pan address is 0x0 or empty), the meter shows 0.
This prevents the meter from freezing at the last value when a stream loses its panadapter binding.

Visual Changes¶

The DAX IQ applet uses theme-aware styling. Meter progress bar backgrounds and chunks adapt to the current theme for consistent appearance across light and dark themes.

Platform-Specific Notes¶

Windows and Linux (PulseAudio only, without PipeWire): Starting with AetherSDR v26.5.1, the DAX IQ audio setup path properly initializes on these platforms. If you previously had IQ streams enabled with no output, toggle the affected channel(s) Off then On again.
Linux with PipeWire: No special action required. The DAX IQ applet works natively.

Persistence¶

IQ stream enable/disable state is persisted per-session in application settings. On reconnection to the radio, the applet restores the state of previously enabled channels after a short delay (approximately 1.5 seconds) to allow session and stream setup to complete.

Troubleshooting¶

Issue	Solution
No audio output on Windows or PulseAudio-only Linux after upgrade	Toggle the affected IQ channel Off, then On again. This triggers the corrected setup path.
Still no output after toggling	Verify your external SDR software (e.g., HDSDR, SDR Console) is configured to receive audio from the correct DAX IQ device.
Meter shows no activity	Ensure the stream is set to On, the selected sample rate matches your external software, and the stream is bound to a panadapter.
Stream does not restore after reconnecting	Make sure the stream was enabled (set to On) before disconnecting. The applet only restores channels that were explicitly enabled.