FRS Signalling Processor
CMX882
Table 6 In-band Tones
Special / Information Tones
Normal Tones
(5th bit = 1)
(5th bit = 0)
4 bit Code
Dec Hex
Freq.
4 bit Code
Dec Hex
Freq.
(Hz)
(Hz)
1981
1124
1197
1275
1358
1446
1540
1640
1747
1860
1055
930
0
1
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
No Tone
0
1
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
Custom Tone 0 P1.21
Custom Tone 1 P1.31
Custom Tone 2 P1.41
Custom Tone 3 P1.51
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
Reserved
10
11
12
13
14
15
10
11
12
13
14
15
2247
991
21102
No Tone
Notes:
1
Special tones 1-4 provide user programmable tone options for both transmit and receive modes
as set in the indicated Program register, for programming information see section 1.6.20.2.
2
Normal tone 14 is the repeat tone, this code must be used in transmit when the new code to be
sent is the same as the previous one. e.g. to send ‘333’ the sequence ‘3R3’ should be sent,
where ‘R’ is the repeat tone. When receiving Selcall tones the CMX882 will indicate the repeat
tone when it is received, it is up to the host to interpret this and decode tones accordingly.
2004 CML Microsystems Plc
23
D/882/7
CMLMICRO [ CML MICROCIRCUITS ]
