Owner`s manual

RELM Wireless Corporation 51
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.
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