From 4bd7030eda0db36fd69125543462ab0db694d1e8 Mon Sep 17 00:00:00 2001
From: Brumi-2021 <86470699+Brumi-2021@users.noreply.github.com>
Date: Sun, 4 Feb 2024 10:20:57 +0100
Subject: [PATCH] Updated Microphone Transceiver (markdown)

---
 Microphone-Transceiver.md | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/Microphone-Transceiver.md b/Microphone-Transceiver.md
index 700af49..5184846 100644
--- a/Microphone-Transceiver.md
+++ b/Microphone-Transceiver.md
@@ -84,6 +84,9 @@ From latest [Nightly Release - 2023-10-21] onwards it has been added a new check
 
 ![image](https://github.com/portapack-mayhem/mayhem-firmware/assets/86470699/d9f5fdc9-45fb-47d6-838a-b3789132dd0c)
 
+Recently ,from nightly-tag-2024-02-04,  after discussing about it , with a ham user discord colleague, we also added new GUI about IQ TX phase calibration adjustment . (It is in the bottom right part of the screen) : "TX-IQ-CAL"
+ 
+![image](https://github.com/portapack-mayhem/mayhem-firmware/assets/86470699/f40c192b-ce66-478a-9769-1737c17eac2f)
 
 * **F:**  This field set the TX Frequency for the transmitter.	Use encoder dial to adjust by Step value (uses a default step value, or step value saved in SETTINGS\tx_mic.ini file if "Load App Settings" is enabled).  A long press of the Select button allows adjusting frequency digits individually.
 
@@ -172,4 +175,12 @@ Once is marked , we have a common same frequency (F = F_TX) and therefore, to no
 
 * **AMP:** RX LNA pre-amplifer  0=0dB or 1=14dB.
 
-Note this application while performing a transmit function  may well over deviate and generate unwanted harmonics.
+* **TX-IQ-CAL:** TX I/Q channel phase calibration, range (+4º ...-4º). Specially usefull to optimize the SSB Suppressed carrier .
+In Hackrf versions r1 to r8 , we are using max2837 , that has a calibration register settings of 5 bits , in Hackrf r9 , we are using max2839, that has 6 bits to cover the same range (+4º,..., -4º phase adj).
+
+As example , see the attenuation of the residual SSB carrier effect, when adjusting that IQ Phase calibration value in an H1R1 with max2837,
+
+![image](https://github.com/portapack-mayhem/mayhem-firmware/assets/86470699/ef8d4aba-9908-43a3-9177-c50c6c5ca155)
+ 
+
+Note this Mic application while performing a transmit function  may well over deviate and generate unwanted harmonics.