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Updated Audio Receivers (markdown)

Mark Thompson 2024-01-29 13:57:40 -06:00
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Audio-Receivers.md

@ -58,7 +58,7 @@ The next item is the setting of the bin sizes used for the waterfall (0-63) with
* **CTCSS:** This Continuous Tone Coded Squelch System is a display at the end of the secondary information line. It is used by many systems and standardised by EIA/TIA, with a description [here.](https://en.wikipedia.org/wiki/Continuous_Tone-Coded_Squelch_System ) In the NFM mode in Audio app, the tone field is increased from 11 to 14 characters.
Now , the CTCSS tone frequency and CTCSS code numbers are displayed at once (if a matching freq was found in the tone_key table). See the Annex to this document below. It should be noted that most of the time the display is jumping around and only clearly displays the received tone when there is a gap in the voice and the Signal is of good quality.
* **Record:** The record button if selected will show the record file name, % of the SD Card used, and at the end of the line is the total recording time available left on the SD card and this decrements when recording.
* **Record:** The record button if selected will show the record file name, % of the SD Card used, and at the end of the line is the total recording time available left on the SD card and this decrements when recording. The file name of the recorded 16-bit mono WAV file includes the date, time, and radio tuning frequency. The WAV file sampling rate depends on the receiver mode; 48KHz for WFM, 24KHz for NFM, or 12KHz for AM.
## CTCSS Tone List