* AM: add opt-in channel-power squelch for AM audio RX
Add an SDR++-style power squelch on the complex channel signal for the
Analog Audio RX app in AM modes (DSB/SSB/CW). The squelch measures the
mean channel power, converts it to dBFS, and mutes the demodulated audio
when the signal is below a user-set threshold. Being carrier-based it
keys on the AM carrier (e.g. airband/ATC) rather than on audio-band
noise, which the existing FM squelch could not do for AM.
A new 'SQ' field (0-99, 0 = off) is added to the AM options view and is
persisted per app via app_settings. Default is 0, so existing AM
behaviour is unchanged unless the user enables it. Threshold maps 1..99
to -80..-20 dBFS.
Touches: message (AMConfigureMessage.squelch_level), baseband_api
(AMConfig::apply), receiver_model (am_squelch_level get/set),
app_settings (persistence), proc_am_audio (DSP), analog_audio_app (UI).
* Refactor audio power calculation to use magnitude squared
Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>
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Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>
* Add files via upload
* Add files via upload
* Add files via upload
* Add files via upload
* Add files via upload
* Add files via upload
* Add files via upload
* Add files via upload
* Use new settings in recon
* Trim on string value read, remove dupe entry
* Check update_range flag when setting values
* Add a few saved settings to scanner
* Add copywrite note
* WIP RadioState init
* TX/RX cleanup
* Update all apps using RadioState and setting modulation mode
* Set apps to use AM mode
* Don't push modulation update in RadioState.
* Support passing overrides to Audio and MicTX
* Support set_nearest on OptionsField, fix recon step
* Fix audio, typo
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Co-authored-by: kallanreed <kylereed@manzana.lan>
Co-authored-by: kallanreed <kallanreed@noreply.github.com>
* Set rf direction in RadioState
* centralize cpld load for TX->RX
* Remove calls to load_sram from all apps
* re-add CPLD hack, don't set radio values directly.
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Co-authored-by: kallanreed <kallanreed@noreply.github.com>
* add a little Stash utility.
* add radio state RAII helper.
* first part of radio_state changes
* add radio_state_ to rest of apps
* fix freq_step and format
* fix unused ui_sigfrx: corrected sample rate, added back freq setting
* Allow apps to not use persisted freq.
* use rx_freq for RX mode
* remove direct call to persistant_memory in tx_model
* app_setting defaults, and tx_view to use ctor value
Mo
Synray
Totoo
Brumi-2021
Mark Thompson
Kyle Reed
Kyle Reed
jLynx
formtapez
Arjan Onwezen