CTCSS TONE CODES
Freq.
(Hz)
Value
(Hex)
Freq.
(Hz)
Value
(Hex)
Freq.
(Hz)
Value
(Hex)
136.5
2 Fh
241.8
1 Fh
67.0
3 Eh
141.3
2 Eh
250.3
1 Eh
71.9
3Dh
146.2
2Dh
C67.0*
1 Dh
77.0
3Ch
151.4
2Ch
C71.9
l Ch
82.5
3Bh
156.7
2Bh
C74.4
1 Bh
88.5
3Ah
162.2
2Ah
C77.0
1 Ah
94.8
39h
167.9
29h
C79.7
19h
100.0
38h
173.8
28h
C82.5
18h
103.5
37h
179.9
27h
C85.4
17h
107.2
36h
186.2
26h
C88.5
16h
110.9
35h
192.8
25h
C91.5
15h
114.8
34h
203.5
24h
118.8
33h
210.7
23h
* 'C' tones are
123.0
32h
218.1
22h
High Q
(80)
127.3
31h
225.7
21h
131.8
30h
233.6
20h
INSTRUCTION CODE CHART
("xx"
i n d i c a t e s p a d d i n g : a n y v a l u e i s a c c e p t a b l e )
I n s t r u c t i o n
P a r a m e t e r s
I n s t r .
R e m a r k s
N a m e M S D
( B C D )
C o d e
C A T O n / O f f x x
x x x x
x x y y
y y : 0 0 h = O N , 8 0 h = O F F . M u s t b e O N b e f o r e
a n y o t h e r c o m m a n d s s e n t .
F r e q u e n c y S e t p 1
p 2 p 3
p 4 0 1 h
p l - p 4 : e i g h t p a c k e d B C D d i g i t s *
T x / R x x x
x x x x
x x y y
y y : 0 8 h = T r a n s m i t , 8 8 h = R e c e i v e
C T C S S S t a t u s x x
x x x x
x x y y
y y : 0 A h = E n c / D e c , 4 A h = E n c , 8 A h = O f f
C T C S S T o n e C o d e l
x x x x
x x F A h
l : s e e C T C S S T o n e C h a r t a b o v e
* e x p l a i n e d i n t e x t
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