Grecom PSR-410 Owner's Manual page 56

Search Lockout
Search lockout works with certain search objects, including LMIT searches,
some SRVC searches, and SWPR objects. Frequency lockout is used to
lock out undesired frequencies that are found during searches.
To apply search lockout during a search, press the FrL/O softkey while
the scanner is stopped on the undesired frequency:
Applying search lockout to an undesired frequency adds that frequency to
the Search Lockout List, a list of frequencies that the scanner ignores when
performing searches or during Spectrum Sweeper operations. You can edit
or clear the Search Lockout List by following these steps:
Press PROG
Press the GLOB softkey
Scroll down to the SRCH L/Outs: item and press SEL
Scroll to the frequencies you wish to remove from the lockout list and press
the Del softkey to remove them from the list.
Scroll to an empty spot and enter any frequency you wish to manually add
to the list.
Press FUNC, then the Del softkey to clear the entire list.
Talkgroup Lockout
Talkgroup lockout is similar to search lockout, as it allows you to lockout
undesired talkgroups while searching for new talkgroup activity with
wildcard TGRP objects.
To apply lockout on an undesired wildcard hit, press the TGL/O softkey
while the scanner is stopped on the undesired talkgroup:
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