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Calculate harmonic

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F5OEO
2024-03-11 13:46:41 +01:00
parent 94d6792920
commit ab2917e745
1 changed files with 13 additions and 3 deletions
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16
src/dvb/dvbrf.cpp
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@@ -36,8 +36,9 @@ fprintf(stderr,\
"\ndvbrf -%s\n\
Usage:\ndvbrf [-i File Input][-s Samplerate][-l] [-f Frequency] [-h Harmonic number] \n\
-i path to Transport Stream File Input \n\
-s SampleRate 10000-250000 \n\
-s SampleRate 10000-1000000 \n\
-c Fec : {1/2,3/4,5/6,7/8} \n\
-c Mode : {dvbs,dvbs2} \n\
-f float central frequency Hz(50 kHz to 1500 MHz),\n\
-l loop mode for file input\n\
-n Use harmonic number n\n\
@@ -57,7 +58,8 @@ terminate(int num)
}
#define MAX_SAMPLERATE 2000000
#define MAX_SAMPLERATE 1000000
#define MAX_FREQUENCY 1e9
int main(int argc, char* argv[])
{
@@ -74,6 +76,7 @@ int main(int argc, char* argv[])
int FEC=-1;
enum {DVBS,DVBS2};
int DVB_Mode=DVBS;//
int nbphase=4;
while(1)
{
a = getopt(argc, argv, "i:f:s:n:lt:c:m:");
@@ -113,7 +116,7 @@ int main(int argc, char* argv[])
if(strcmp("carrier",optarg)==0) {fprintf(stderr,"Carrier mode\n");FEC=0;}//CARRIER MODE
break;
case 'm': // FEC
case 'm': // Mode
if(strcmp("dvbs",optarg)==0) DVB_Mode=DVBS;
if(strcmp("dvbs2",optarg)==0) DVB_Mode=DVBS2;
break;
@@ -166,6 +169,13 @@ int main(int argc, char* argv[])
exit(0);
}
while(SetFrequency*(float)(nbphase*2)/(float)Harmonic>1e9)
{
Harmonic+=2;
}
if(Harmonic>1)
fprintf(stderr,"Using harmonic %d : main frequency=%0.f\n",Harmonic,SetFrequency/(float)Harmonic);
if(DVB_Mode==DVBS)
{
int FifoSize=204*100*4;