Digital Video Recorder User Manual 
 
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6.1.6 Playing Back by System Logs ................................................................................. 110 
6.1.7 Playing Back by Sub-Periods .................................................................................. 111 
6.1.8 Playing Back External File ...................................................................................... 112 
6.2 Auxiliary Functions of Playback ...................................................................................... 113 
6.2.1 Playing Back Frame by Frame ............................................................................... 113 
6.2.2 Digital Zoom .......................................................................................................... 113 
6.2.3 Reverse Playback of Multi-Channel ....................................................................... 114 
Chapter 7 Backup .......................................................................................................................... 115 
7.1 Backing up Record Files .................................................................................................. 115 
7.1.1 Backing up by Normal Video/Picture Search ........................................................ 115 
7.1.2 Backing up by Event Search ................................................................................... 117 
7.1.3 Backing up Video Clips .......................................................................................... 118 
7.2 Managing Backup Devices .............................................................................................. 119 
Chapter 8 Alarm Settings ............................................................................................................. 121 
8.1 Setting Motion Detection ............................................................................................... 121 
8.2 Setting Sensor Alarms .................................................................................................... 123 
8.3 Detecting Video Loss ...................................................................................................... 125 
8.4 Detecting Video Tampering ........................................................................................... 127 
8.5 Setting All-day Video Quality Diagnostics ...................................................................... 128 
8.6 Handling Exceptions ....................................................................................................... 130 
8.7 Setting Alarm Response Actions .................................................................................... 132 
Chapter 9 POS Configuration ...................................................................................................... 135 
9.1 Configuring POS Settings ................................................................................................ 135 
9.2 Configuring Overlay Channel .......................................................................................... 140 
9.3 Configuring POS Alarm ................................................................................................... 141 
Chapter 10 VCA Alarm ................................................................................................................ 143 
10.1 Face Detection.............................................................................................................. 143 
10.2 Vehicle Detection ......................................................................................................... 145 
10.3 Line Crossing Detection ................................................................................................ 146 
10.4 Intrusion Detection ...................................................................................................... 148 
10.5 Region Entrance Detection .......................................................................................... 149 
10.6 Region Exiting Detection .............................................................................................. 151 
10.7 Loitering Detection ....................................................................................................... 151 
10.8 People Gathering Detection ......................................................................................... 151