Uniden LRD 6199SWS - Manual (Page 15)

City Operation
In highly populated areas, you may encounter many devices that use the
same frequencies as radar signals, such as motion detectors, automatic
doors, and intrusion alarms. These devices may trigger an alert called
“falsing.”
To filter most of the weaker signals and get the most accurate radar signal
recognition, press CITY to turn on the City Mode.
The City indicator lights.
In City Mode, the combination of visual and audio alert tones varies
based on the strength of the received signal.
Note: If you use both Audio Only Alert and City modes, you won’t
receive an alert until you are very close to the radar source.
15
MUTE AUDIO CITY