Memorex MK1995 - Manual (Page 21)

Operation
18
Main Channel Scan
This feature allows you to monitor all channels automatically for valid
signals. While scanning, you can transmit and receive. When a signal
is received, scan is interrupted and you will hear the channal for 5
seconds. After the 5 seconds, the unit will resume scanning unless
the Scan button is pressed again as described below.
1. To start Scan mode, press the SCAN button momentarily.
The ( ) icon will be displayed on the LCD screen and the unit
will scan through the 15 channels to find an active channel. When
an active channel is found, it will be heard for 5 seconds, and then
scanning will resume.
2. If the unit does not locate an active signal and you would like to
transmit, press the PTT button to return to home channel operation.
After approximately 5 seconds after the communication is complet-
ed, the transceiver will automatically resume scanning.
3. To exit from the Scan mode, press the SCAN button again. The unit
will return to normal operation and the ( ) icon will disappear
from the LCD screen.