TheArchive/mayhem-firmware
1
0
Fork 0
mirror of https://github.com/portapack-mayhem/mayhem-firmware.git synced 2024-12-11 18:54:34 +00:00
Code Issues Packages Projects Releases Wiki Activity

Updated Signal Generator (markdown)

Brumi-2021 2023-05-07 00:46:18 +02:00
parent 938c9a8ac0
commit 0a371d253c
1 changed files with 1 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
Signal-Generator.md

@ -26,9 +26,7 @@ Stop after 1s limits carrier duration to 1 second
From nightly 1st of May 23 fw onwards, we have added 3 White Noise simulation options. From nightly 1st of May 23 fw onwards, we have added 3 White Noise simulation options.
We are generating simulated White Noise ,using pseudo random noise generator, 8 bits linear-feedback shift register (LFSR) algorithm, variant Fibonacci. (Following this wiki [link](https://en.wikipedia.org/wiki/Linear-feedback_shift_register)) We are generating simulated White Noise ,using pseudo random noise generator, 8 bits linear-feedback shift register (LFSR) algorithm, variant Fibonacci. (Following this wiki [link](https://en.wikipedia.org/wiki/Linear-feedback_shift_register))
* noise n x 20khz, (taps: 6 5; feedback polynomial: x^6 + x^5 + 1 , Periode 63 = 2^n-1,it generates harmonincs aprox every n x 20Khz * noise signal
* noise n x 10khz (taps: 7 6; feedback polynomial: x^7 + x^6 + 1 , Periode 127 = 2^n-1,it generates harmonincs aprox every n x 10Khz
* noise n x 5khz (taps:8,6,5,4;feedback polynomial: x^8 + x^6 + x^5 + x^4 + 1,Periode 255= 2^n-1, harmonics aprox every n x 5khz
Those GUI title, is indicating that the contents of the FFT spectrum , has harmonics of n x 20khz, or n x 10khz, or n x 5khz. Those GUI title, is indicating that the contents of the FFT spectrum , has harmonics of n x 20khz, or n x 10khz, or n x 5khz.
(so user can select the granularity of the noise harmonics, ideally White noise should have all infinite harmonics) . (so user can select the granularity of the noise harmonics, ideally White noise should have all infinite harmonics) .