BK Radio
Page 2-63
installation and programming
2.2.6 ctcSS code Guard valueS
The CTCSS Code Guard system may be set for any frequency in the range of 67 to 255.9 Hz. However,
since most systems adhere to the Electronic Industry Association (EIA) standards, tones should be
selected from the following EIA list. In order to insure optimum performance, tone selection for use on
the same radio frequency (RF) channel or adjacent channels in the same coverage area should be made
from one of the Groups A, B, or C to the maximum degree possible.
Group a
Group B
Group c
67.0 (XZ)
*151.4 (5Z)
71.9 (XA)
146.2 (4B)
74.4
77.0 (XB)
162.2 (5B)
82.5 (YZ)
156.7 (5A)
79.7
88.5 (YB)
173.8 (6A)
94.8 (ZA)
167.9 (6Z)
85.4 (YA)
*100.0 (1Z)
186.2 (7Z)
103.5 (1A)
*179.9 (6B)
91.5 (ZZ)
107.2 (1B)
203.5 (M1)
110.9 (2X)
192.8 (7A)
114.8 (2A)
218.1 (M3)
*118.8 (2B)
210.7 (M2)
123.0 (3Z)
233.6
127.3 (3A)
225.7 (M4)
131.8 (3B)
250.3
136.5 (4Z)
241.8
141.3 (4A)
* 50/60 Hz power distribution systems could cause falsing.
The assignments in a given area shall be made from within one of the Groups: A, B, or C.
2.2.7 cdcSS code Guard valueS
Codes for the CDCSS Code Guard system may be chosen from the following list. Since there are no
EIA standards for the performance or compatibility of CDCSS Code Guard systems it is recommended
that an operational test be made on the intended system before wholesale assignments are made. In
some cases either or both transmit and receive codes will require an inverted code to operate with
existing systems. This can be done during the code programming of the system. Usually systems using
direct Unit-to-Unit transmission (systems without mobile relays, repeaters, remote control, etc.) may
use codes from the table. Systems with relays, etc., may use code variations for systems control and
operational efficiency. The system operator or engineer should be consulted regarding the operational
requirement on such systems.
023
065
131
165
245
315
411
466
612
703
025
071
132
172
251
331
412
503
624
712
026
072
134
174
261
343
423
506
627
723
031
073
143
205
263
346
431
516
631
731
032
074
152
223
265
351
432
532
632
732
043
114
155
226
271
364
445
546
654
734
047
115
156
243
306
365
464
565
662
743
051
116
162
244
311
371
465
606
664
754
054
125
Summary of Contents for P150
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Page 79: ...Page 2 64 Service Manual KNG Portables Installation and Programming BLANK PAGE ...
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