Filter
Top Products
85
ST Event Code Warning Watch Advisory Denition?
SVR Severe Thunderstorm
Warning
O Thunderstorm
SVS Severe Weather Statement O Severe WX
TOA Tornado Watch O Tornado
TOE 911 Telephone Outage
Emergency
O 911 Phone Outage
TOR Tornado Warning O Tornado
TRA Tropical Storm Watch O Tropical Storm
TRW Tropical Storm Warning O Tropical Storm
TSA Tsunami Watch O Tsunami
TSW Tsunami Warning O Tsunami
TXB Transmitter Backup On O TX Backup On
TXF Transmitter Carrier Off O TX Carrier Off
TXO Transmitter Carrier On O TX Carrier On
TXP Transmitter Primary On O TX Primary On
VOW Volcano Warning O Volcano
WFA Wild Fire Watch O Wild Fire
WFW Wild Fire Warning O Wild Fire
WSA Winter Storm Watch O Winter Storm
WSW Winter Storm Warning O Winter Storm
**A Unrecognized Watch O Unrecognized
**E Unrecognized Emergency O Unrecognized
**S Unrecognized Statement O Unrecognized
**W Unrecognized Warning O Unrecognized
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 131.8Hz 171.3Hz 203.5Hz
69.3Hz 97.4Hz 136.5Hz 173.8Hz 206.5Hz
71.9Hz 100.0Hz 141.3Hz 177.3Hz 210.7Hz