williamp/osmocom-analog
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

JTACS: Implementation of the Japanese variant of TACS

Browse Source
This commit is contained in:
Andreas Eversberg
2017-08-27 18:02:43 +02:00
parent 489ab9506c
commit 94ed39f5e2
13 changed files with 265 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
src/amps/amps.c
View File

@@ -83,16 +83,28 @@ double amps_channel2freq(int channel, int uplink)
channel -= 1023;
freq = 870.030 + (channel - 1) * 0.030;
} else {
if (uplink)
freq -= 45.000;
} else if (!jtacs) {
/* 600 channels */
if (channel < 1 || channel > 600)
return 0;
freq = 935.0125 + (channel - 1) * 0.025;
}
if (uplink)
freq -= 45.000;
if (uplink)
freq -= 45.000;
} else {
/* 799 channels */
if (channel < 1 || channel > 799)
return 0;
freq = 860.0125 + (channel - 1) * 0.025;
if (uplink)
freq += 55.000;
}
return freq * 1e6;
}