Uniden UBC396T - Manual (Page 122)

120
Care and Maintenance
Repairs
Do not attempt any repair. The scanner contains no
user serviceable parts. Contact the Uniden Customer
Service Center or take it to a qualified repair
technician.
Birdies
All radios can receive “birdies” (undesired signals).
If your scanner stops during Scan mode and no sound
is heard, it might be receiving a birdie. Birdies are
internally generated signals inherent in the electronics
of the scanner.
Press L/O to lock out the channel.