From 1320ea2f53909a0b103aa0aa8a497334ac124528 Mon Sep 17 00:00:00 2001
From: Brumi-2021 <86470699+Brumi-2021@users.noreply.github.com>
Date: Mon, 25 Mar 2024 11:07:20 +0100
Subject: [PATCH] Updated Audio Receivers (markdown)

---
 Audio-Receivers.md | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Audio-Receivers.md b/Audio-Receivers.md
index 799e2e5..87e9ecb 100644
--- a/Audio-Receivers.md
+++ b/Audio-Receivers.md
@@ -44,6 +44,12 @@ The Key Items on the App that can be seen or selected with the cursor and change
 
      * (3) 40k with also sharp transition, for supporting NOAA APT weather satellite reception in 137 MHz . (that filter is too narrow for WFM with 75khz delta deviation and can produce audio distortion in the demodulated sound). The Spectrum view is +/-100k with a marker That may be changed (though seem the incorrect value).
 
+     * Just below REC Icon we have a marker Frequency field input (0 Hz) , that we can increase or decrease from 0..48kHz range with the knob rotary encoder with a jumps of 200 Hz steps. It will move a short vertical red line pointing the spectrum IF demodulated FM baseband FFT graphic . It could be useful to see the exact frequency of those spectrum peaks, like the below picture , showing 19Khz pilot carrier tone from a Stereo FM Broadcasting .
+ 
+> ![image](https://github.com/portapack-mayhem/mayhem-firmware/assets/86470699/88ef7389-d7c0-47a8-84ed-05d836879af5)
+
+
+
     * **SPEC.** The spectrum Secondary Items allows the view of the RF spectrum with different setting for maximum bandwidth shown:
             
             20M with markers at +/- 5M