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DCS Setup
DCS is a data waveform formed by a digital carrier signals using "0" and "1" data. The 23
bit data signal includes the checksum and data codes. It provides a choice of 83x2
(reverse codes included) standard channels and one user-defined channel. A DCS event
can be detected by using polling (I/O CMD-23h[2]) or interrupt(10004 I/O CMD-23h[2])
together with a DCS turn off tone (I/O CMD-23h[1]) event detection to indicate the end of
a DCS signal (provided by some systems) in order to stop the audio output, or to transmit
an end signal (I/O CMD-82B7F, generally about 200ms~300ms) after a DCS signal is
sent in the Tx mode. The related configuration is shown in the table below:
Tone
DCS
Tone
Number
Data
Number
Code
01h
023
1Dh
02h
025
1Eh
03h
026
1Fh
04h
031
20h
05h
032
21h
06h
043
22h
07h
047
23h
08h
051
24h
09h
054
25h
0Ah
065
26h
0Bh
071
27h
0Ch
072
28h
0Dh
073
29h
0Eh
074
2Ah
0Fh
114
2Bh
10h
115
2Ch
11h
116
2Dh
12h
125
2Eh
13h
131
2Fh
14h
132
30h
15h
134
31h
16h
143
32h
17h
152
33h
18h
155
34h
19h
156
35h
1Ah
162
36h
1Bh
165
37h
1Ch
172
38h
DCS
Tone
DCS
Data
Number
Data
Number
Code
Code
174
39h
445
205
3Ah
464
223
3Bh
465
226
3Ch
466
243
3Dh
503
244
3Eh
506
245
3Fh
516
251
40h
532
261
41h
546
263
42h
565
265
43h
606
271
44h
612
306
45h
624
311
46h
627
315
47h
631
331
48h
632
343
49h
654
346
4Ah
662
351
4Bh
664
364
4Ch
703
365
4Dh
712
371
4Eh
723
411
4Fh
731
412
50h
732
413
51h
734
423
52h
743
431
53h
754
432
DCS Code vs. Tone Numbers Table
18
HT98R068 Two-way Radio MCU
Tone
DCS Data
Tone
Code
Number
Invert-ed
81h
023
9Dh
82h
025
9Eh
83h
026
9Fh
84h
031
A0h
85h
032
A1h
86h
043
A2h
87h
047
A3h
88h
051
A4h
89h
054
A5h
8Ah
065
A6h
8Bh
071
A7h
8Ch
072
A8h
8Dh
073
A9h
8Eh
074
AAh
8Fh
114
ABh
90h
115
ACh
91h
116
ADh
92h
125
AEh
93h
131
AFh
94h
132
B0h
95h
134
B1h
96h
143
B2h
97h
152
B3h
98h
155
B4h
99h
156
B5h
9Ah
162
B6h
9Bh
165
B7h
9Ch
172
B8h
DCS Data
Tone
DCS Data
Code
Number
Code
Invert-ed
Invert-ed
174
B9h
445
205
BAh
464
223
BBh
465
226
BCh
466
243
BDh
503
244
BEh
506
245
BFh
516
251
C0h
532
261
C1h
546
263
C2h
565
265
C3h
606
271
C4h
612
306
C5h
624
311
C6h
627
315
C7h
631
331
C8h
632
343
C9h
654
346
CAh
662
351
CBh
664
364
CCh
703
365
CDh
712
371
CEh
723
411
CFh
731
412
D0h
732
413
D1h
734
423
D2h
743
431
D3h
754
432
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