TheArchive/mayhem-firmware
1
0
Fork 0
mirror of https://github.com/portapack-mayhem/mayhem-firmware.git synced 2024-11-30 13:35:31 +00:00
Code Issues Packages Projects Releases Wiki Activity

Updated Microphone Transceiver (markdown)

Brumi-2021 2024-02-04 14:58:18 +01:00
parent f596a5e18d
commit f085ca2e90
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
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. * **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). 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, As example , see the attenuation of the residual SSB carrier effect, when adjusting that IQ Phase calibration value in an H1R1 with max2837,