NTSC
Acronym for Naonal Television System Commiee. NTSC is an analog television standard used
in such countries as the United States and Japan. Each frame of an NTSC signal contains 525
scan lines at 60Hz.
NVR
Acronym for Network Video Recorder. An NVR can be a PC-based or embedded system used for
centralized management and storage for IP cameras, IP Domes and other DVRs.
PAL
Acronym for Phase
Alternang Line. PAL is also another video standard used in broadcast
televisions systems in large parts of the world. PAL signal contains 625 scan lines at 50Hz.
PTZ
Acronym for Pan, Tilt, Zoom. PTZ cameras are motor driven systems that allow the camera to
pan
le and right, lt up and down and zoom in and out.
USB
Acronym for Universal Serial Bus. USB is a plug-and-play serial bus standard to interface devices
to a host computer.
14.2 Frequently Asked
Quesons
14.2.1 Why is there a part of channels displaying “No Resource” or turning black
screen in mul-screen of live view?
Reason
1. Sub-stream resoluon or bitrate sengs is inappropriate.
2. Connecng sub-stream failed.
Soluon
1. Go to Camera → Video Parameters → Sub-Stream . Select the channel, and turn down the
resoluon and max. bitrate (resoluon shall be less than 720p, max. bitrate shall be less than
2048 Kbps).
Note
If your video recorder noes not support this funcon, you can log in to the camera, and
adjust video parameters via web browser.
2. Properly set the sub-stream resoluon and max. bitrate (resoluon shall be less than 720p, max.
bitrate shall be less than 2048 Kbps), then delete the channel and add it back again.
Network Video Recorder User Manual
157
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