Ctcss Frequencies - Uniden BCD436HP Owner's Manual

ST
sVr severe Thunderstorm
Warning
sVs severe Weather statement
Toa Tornado Watch
Toe 911 Telephone outage
emergency
Tor Tornado Warning
Tra Tropical storm Watch
TrW Tropical storm Warning
Tsa Tsunami Watch
TsW Tsunami Warning
TxB Transmitter Backup on
TxF Transmitter Carrier off
Txo Transmitter Carrier on
TxP Transmitter Primary on
VoW Volcano Warning
WFa Wild Fire Watch
WFW Wild Fire Warning
Wsa Winter storm Watch
WsW Winter storm Warning
**a unrecognized Watch
**e unrecognized emergency
**s unrecognized statement
**W unrecognized Warning
Continuous Tone Coded Squelch System (CTCSS) and Digital Coded Squelch (DCS) are two
methods used to prevent interference by other radio communications. Your scanner can receive
transmissions that use these codes.
CTCSS and DCS systems all use some form of coded squelch. Coded squelch involves the
transmission of a special code signal along with the audio of a radio transmission. A receiver with
coded squelch only activates when the received signal has the correct code. This lets many users
share a single frequency, and decreases interference caused by distant transmitters on the same
channel. In all major metropolitan areas of the United States, every available radio channel is
assigned to more than one user.

CtCss frequenCIes

The scanner can detect the following 50 CTCSS frequencies.
67 .0hz 94 .8hz
69 .3hz 97 .4hz
71 .9hz 100 .0hz
Event Code
131 .8hz
136 .5hz
141 .3hz
Warning Watch
o
o
o
o
o
o
o
o
o
o
o
o
o
o
171 .3hz
173 .8hz
177 .3hz
Advisory Definition?
Thunderstorm
o severe Wx
Tornado
o 911 Phone outage
Tornado
Tropical storm
Tropical storm
Tsunami
Tsunami
o Tx Backup on
o Tx Carrier off
o Tx Carrier on
o Tx Primary on
Volcano
Wild Fire
Wild Fire
Winter storm
Winter storm
unrecognized
o unrecognized
o unrecognized
unrecognized
203 .5hz
206 .5hz
210 .7hz
85