static int power_meter_tests(void)
{
awgn_state_t noise_source;
power_meter_t meter;
tone_gen_descriptor_t tone_desc;
tone_gen_state_t gen;
int i;
int idum = 1234567;
int16_t amp[1000];
int len;
int32_t level;
power_meter_init(&meter, 7);
printf("Testing with zero in the power register\n");
printf("Power: expected %fdBm0, got %fdBm0\n", -90.169f, power_meter_current_dbm0(&meter));
printf("Power: expected %fdBOv, got %fdBOv\n", -96.329f, power_meter_current_dbov(&meter));
printf("Testing with a square wave 10dB from maximum\n");
for (i = 0; i < 1000; i++)
{
amp[i] = (i & 1) ? 10362 : -10362;
level = power_meter_update(&meter, amp[i]);
//printf("%12d %fdBm0 %fdBov\n", level, power_meter_current_dbm0(&meter), power_meter_current_dbov(&meter));
}
printf("Level: expected %" PRId32 "/%" PRId32 ", got %" PRId32 "\n", power_meter_level_dbov(-10.0f), power_meter_level_dbm0(-10.0f + DBM0_MAX_POWER), level);
printf("Power: expected %fdBm0, got %fdBm0\n", -10.0f + DBM0_MAX_POWER, power_meter_current_dbm0(&meter));
printf("Power: expected %fdBOv, got %fdBOv\n", -10.0f, power_meter_current_dbov(&meter));
if (level < power_meter_level_dbov(-10.0f)*0.99f
||
level > power_meter_level_dbov(-10.0f)*1.01f)
{
printf("Test failed (level)\n");
exit(2);
}
if (0.1f < fabsf(power_meter_current_dbm0(&meter) + 10.0f - DBM0_MAX_POWER))
{
printf("Test failed (dBm0)\n");
exit(2);
}
if (0.1f < fabsf(power_meter_current_dbov(&meter) + 10.0))
{
printf("Test failed (dBOv)\n");
exit(2);
}
printf("Testing with a sine wave tone 10dB from maximum\n");
tone_gen_descriptor_init(&tone_desc,
1000,
-4,
0,
1,
1,
0,
0,
0,
true);
tone_gen_init(&gen, &tone_desc);
len = tone_gen(&gen, amp, 1000);
for (i = 0; i < len; i++)
{
level = power_meter_update(&meter, amp[i]);
//printf("%12d %fdBm0 %fdBov\n", level, power_meter_current_dbm0(&meter), power_meter_current_dbov(&meter));
}
printf("Level: expected %" PRId32 "/%" PRId32 ", got %" PRId32 "\n", power_meter_level_dbov(-10.0f), power_meter_level_dbm0(-10.0f + DBM0_MAX_POWER), level);
printf("Power: expected %fdBm0, got %fdBm0\n", -10.0f + DBM0_MAX_POWER, power_meter_current_dbm0(&meter));
printf("Power: expected %fdBOv, got %fdBOv\n", -10.0f, power_meter_current_dbov(&meter));
if (level < power_meter_level_dbov(-10.0f)*0.95f
||
level > power_meter_level_dbov(-10.0f)*1.05f)
{
printf("Test failed (level)\n");
exit(2);
}
if (0.2f < fabsf(power_meter_current_dbm0(&meter) + 10.0f - DBM0_MAX_POWER))
{
printf("Test failed (dBm0)\n");
exit(2);
}
if (0.2f < fabsf(power_meter_current_dbov(&meter) + 10.0))
{
printf("Test failed (dBOv)\n");
exit(2);
}
printf("Testing with AWGN 10dB from maximum\n");
awgn_init_dbov(&noise_source, idum, -10.0f);
for (i = 0; i < 1000; i++)
amp[i] = awgn(&noise_source);
for (i = 0; i < 1000; i++)
{
level = power_meter_update(&meter, amp[i]);
//printf("%12d %fdBm0 %fdBov\n", level, power_meter_current_dbm0(&meter), power_meter_current_dbov(&meter));
}
printf("Level: expected %" PRId32 "/%" PRId32 ", got %" PRId32 "\n", power_meter_level_dbov(-10.0f), power_meter_level_dbm0(-10.0f + DBM0_MAX_POWER), level);
printf("Power: expected %fdBm0, got %fdBm0\n", -10.0f + DBM0_MAX_POWER, power_meter_current_dbm0(&meter));
printf("Power: expected %fdBOv, got %fdBOv\n", -10.0f, power_meter_current_dbov(&meter));
if (level < power_meter_level_dbov(-10.0f)*0.95f
||
level > power_meter_level_dbov(-10.0f)*1.05f)
{
printf("Test failed (level)\n");
exit(2);
}
if (0.2f < fabsf(power_meter_current_dbm0(&meter) + 10.0f - DBM0_MAX_POWER))
{
printf("Test failed (dBm0)\n");
exit(2);
}
if (0.2f < fabsf(power_meter_current_dbov(&meter) + 10.0f))
{
printf("Test failed (dBOv)\n");
exit(2);
}
return 0;
}
void awgn_init_dbm0(awgn_state_t *s, int idum, float level)
{
awgn_init_dbov(s, idum, level - DBM0_MAX_POWER);
}
