From f085ca2e909f8980d64a80c7714d5b961ea41635 Mon Sep 17 00:00:00 2001 From: Brumi-2021 <86470699+Brumi-2021@users.noreply.github.com> Date: Sun, 4 Feb 2024 14:58:18 +0100 Subject: [PATCH] Updated Microphone Transceiver (markdown) --- Microphone-Transceiver.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/Microphone-Transceiver.md b/Microphone-Transceiver.md index a6c7cfa..625ea72 100644 --- a/Microphone-Transceiver.md +++ b/Microphone-Transceiver.md @@ -175,7 +175,7 @@ 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. -* **TX-IQ-CAL:** TX I/Q channel phase calibration, range (+4º ...-4º). Specially usefull to optimize the SSB (USB-LSB) or DSB-SC , Suppressed carrier . +* **TX-IQ-CAL:** TX I/Q channel phase calibration, to adjust the imbalance IQ modulator phase error. The adjustment range is (+4º ...-4º). Specially usefull to optimize the SSB (USB-LSB) or DSB-SC , 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,