ttrftech/NanoVNA
1
0
Fork 0
mirror of https://github.com/ttrftech/NanoVNA.git synced 2025-12-06 03:31:59 +01:00
Code Issues Actions Packages Projects Releases Wiki Activity

fix imbalance of gain (based on hugen79 values with a little bit more fine tuning to eliminate discontinuities)

Browse source
This commit is contained in:
qrp73 2019-10-05 23:48:19 +03:00
parent 957eacff27
commit 675b5bb3bc
1 changed files with 10 additions and 10 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

20
main.c
View file

@ -269,23 +269,23 @@ static void cmd_reset(BaseSequentialStream *chp, int argc, char *argv[])
;
}
const int8_t gain_table[] = {
0, // 0 ~ 300MHz
40, // 300 ~ 600MHz
50, // 600 ~ 900MHz
75, // 900 ~ 1200MHz
85, // 1200 ~ 1400MHz
95 // 1400MHz ~
// {gainLeft, gainRight}
const int8_t gain_table[][2] = {
{ 0, 0 }, // 1st: 0 ~ 300MHz
{ 43, 40 }, // 2nd: 300 ~ 600MHz
{ 53, 50 }, // 3rd: 600 ~ 900MHz
{ 75, 72 }, // 4th: 900 ~ 1200MHz
{ 83, 80 }, // 5th: 1200 ~ 1400MHz
{ 93, 90 }, // 6th: 1400MHz ~
};
static int
adjust_gain(int newfreq)
static int adjust_gain(int newfreq)
{
int delay = 0;
int new_order = newfreq / FREQ_HARMONICS;
int old_order = frequency / FREQ_HARMONICS;
if (new_order != old_order) {
tlv320aic3204_set_gain(gain_table[new_order], gain_table[new_order]);
tlv320aic3204_set_gain(gain_table[new_order][0], gain_table[new_order][1]);
delay += 10;
}
return delay;