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Updated Microphone Transceiver (markdown)

Brumi-2021 2022-10-26 23:09:31 +02:00
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Microphone-Transceiver.md

@ -5,7 +5,7 @@ Later on , thanks to many other great sw developpers , gradually it has been add
And from Sept -2020, it was also added the support of multi analogue mic Modulation types in half duplex TX / RX, highly appreciated specially by all ham amateur radio community. Those mod types are widely used in LF, HF , VHF, 2m band , maritime communications ,airport airband communications, UHF PMR446,... And from Sept -2020, it was also added the support of multi analogue mic Modulation types in half duplex TX / RX, highly appreciated specially by all ham amateur radio community. Those mod types are widely used in LF, HF , VHF, 2m band , maritime communications ,airport airband communications, UHF PMR446,...
And since them we are currently supporting those following ones (valid from , [Nightly Release - 2022-10-17](https://github.com/eried/portapack-mayhem/releases/tag/nightly-tag-2022-10-17) onwards) : And since them we are currently supporting those following ones (valid from , [Nightly Release - 2022-10-17](https://github.com/eried/portapack-mayhem/releases/tag/nightly-tag-2022-10-17) onwards) :
* Narrow band FM (NBFM), * Narrow and normal band FM (NBFM/FM),
* Wide band FM (WBFM), * Wide band FM (WBFM),
* Amplitude Modulation (AM), * Amplitude Modulation (AM),
* Upper Side Band (USB), * Upper Side Band (USB),
@ -41,7 +41,7 @@ If you want to know the audio codec IC of your Portapack board, you do not need
**Automatic mic Level Control "ALC" (AK4951 sound codec IC) or "Boost" pre-amplifier mic control adjustment (WM8731 audio codec IC) :** (*1) **Automatic mic Level Control "ALC" (AK4951 sound codec IC) or "Boost" pre-amplifier mic control adjustment (WM8731 audio codec IC) :** (*1)
To minimize that mic ADC saturation (and consequently, audio distortion , and spectrum harmonics radiation), we introduced ALC(AK4951) and Boost(WM8731) options control. To minimize that mic ADC saturation (and consequently, audio distortion , and spectrum harmonics radiation), we introduced ALC(AK4951) and Boost(WM8731) control options.
* ![image](https://user-images.githubusercontent.com/86470699/196547451-91bc4b30-ae66-4506-b8a8-490d280f79da.png) * ![image](https://user-images.githubusercontent.com/86470699/196547451-91bc4b30-ae66-4506-b8a8-490d280f79da.png)
![image](https://user-images.githubusercontent.com/86470699/196548467-50852c3b-e4e5-47c4-b047-6efb7b0d6dea.png) ![image](https://user-images.githubusercontent.com/86470699/196548467-50852c3b-e4e5-47c4-b047-6efb7b0d6dea.png)