Oricom DTX4000 Operating Instructions Manual page 15

For this example we are removing CH02 during the scan.
Because it is only noise.
1. Press SC/RM button for 2 seconds.
2. Scanning will resume.
3. Channel 02 is removed during scan.
Group Memory Scan
Memory scan must be stored to the memory channels in groups A to C.
Refer to memory recall function.
1. Press MR/MW button to change the setting between A, B, C and
blinking A, B, C.
When blinking, then all groups will be scanned starting in selected
group.
2. Press Scan button to start group scan.
The MS-SC sub menu display appears on the LCD.
3. To stop Group memory Scan, press SCAN/RM button or PTT press.
Group tone Scan
Group tone scan is the default scan mode and is enabled to allow
continual communication across congested channels.
Group Tone Scans channel stored into Group memory scan and only
opens the squelch for signals with the correct sub code (38 CTCSS or
104 DCS tone).
To achieve this, all radios in your group must have the same channels in
A, B, C memory (group memory channels) and use the same Subcode
(38 CTCSS and 104 DCS tone).
Operations
SCAN
RM
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