User`s manual

Operation of DR3
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3.8.2 Extended Filename
Under extended filename, you can name recording video using time that you record &
frames of recording video, the details of extended filename as follow:
DVR_20_34_12_05.mpg
DVR = unique ID set by system.ini
20 = hours (24 hour clock)
34 = minutes
12 = seconds
25 = frame number
To change filename of video to extended format, you can set it in DR3 LCD menu,
enter menu, select RECORD item, then select FILENAME sub-item, then change
filename from Standard to Extended format.
For details of change filename, please refer Chapter 12 : Configure DR3 using LCD
Menu.