The Google Image search operates identically to the Web search with the exception of a few of the advanced search terms, which we will discuss in the next chapter. Google will attempt to locate your search terms in the image filename, the image caption, the text surrounding the image, and/or in other undisclosed locations to return a somewhat “de-duplicated” list of images that match your search criteria. The Google Image search feature allows you to search (at the time of this writing) over a billion graphic files that match your search criteria. Justin Brown, in Google Hacking for Penetration Testers (Third Edition), 2016 Google Image Search The authors, however, have found that it is easier to clear memory and start fresh. Some units allow selective memory deletion, meaning that you can leave some birdies in the list to be locked out. Be sure to clear the memory before performing a search in a new location, or you may find that you have locked out the very frequency you are looking for. Keep in mind that some radios will store frequencies that you locked out between power on and off cycles or searching sessions.
This is much easier than using the search or scan button each time the scanner locks on a birdie or other undesired signal. You can first scan the range and lockout birdies or other signals that are not of interest.
One option to take advantage of this feature is to set up the scanner overnight or while you are working on other things, and then return to see what the scanner has found.
Some units will store frequencies where they find activity into scratch memory, sometimes referred to as “monitor channels.” This feature is valuable for penetration testers, and is very helpful when looking for a signal in a set area. The search feature allows you to program in high and low frequency stops, and the scanner will scan the defined range and stop on activity. Chris Sanyk, in Wireless Reconnaissance in Penetration Testing, 2013 Search Basic Overview of Equipment and How it Works
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