radio95/fm95
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change the power measurement logic for mpx only a bit

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kuba
2025-04-19 10:01:57 +02:00
parent 9bd229e11b
commit 6b98127edf
1 changed files with 2 additions and 3 deletions
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src/fm95.c
+2 -3
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@@ -16,7 +16,6 @@
#define DEFAULT_MPX_POWER 3.0f // dbr, this is for BS412, simplest bs412 #define DEFAULT_MPX_POWER 3.0f // dbr, this is for BS412, simplest bs412
#define DEFAULT_MPX_DEVIATION 75000.0f // for BS412 #define DEFAULT_MPX_DEVIATION 75000.0f // for BS412
#include "../lib/constants.h"
#include "../lib/oscillator.h" #include "../lib/oscillator.h"
#include "../lib/filters.h" #include "../lib/filters.h"
#include "../lib/fm_modulator.h" #include "../lib/fm_modulator.h"
@@ -543,9 +542,9 @@ int main(int argc, char **argv) {
if(sca_on) mpx += modulate_fm(&sca_mod, hard_clip(current_sca_in, sca_clipper_threshold))*SCA_VOLUME; if(sca_on) mpx += modulate_fm(&sca_mod, hard_clip(current_sca_in, sca_clipper_threshold))*SCA_VOLUME;
float mpx_only = measure_mpx(&mpx_only_power, mpx * mpx_deviation); float mpx_only = measure_mpx(&mpx_only_power, mpx * mpx_deviation);
float mpower = measure_mpx(&power, (audio+mpx) * mpx_deviation); float mpower = measure_mpx(&power, (audio+mpx) * mpx_deviation) - mpx_only;
if (mpower > mpx_power) { if (mpower > mpx_power) {
float excess_power = mpower - mpx_power - mpx_only; float excess_power = mpower - mpx_power;
audio *= (dbr_to_deviation(-excess_power)/mpx_deviation); audio *= (dbr_to_deviation(-excess_power)/mpx_deviation);
} }