User Manual

DW Spectrum 3.0
Rev. 072017 Page | 142
CPU and Bandwidth Saving during Playback (RADASS)
DW Spectrum's architectures provides significant CPU and network bandwidth savings by acquiring multiple streams
from a single camera: High Resolution (regular) and Low Resolution (approximately 10 times less bandwidth). If there
is not enough bandwidth between Client and Server to display the High Resolution stream while viewing a camera,
then the camera is automatically switched to Low Resolution mode.
In case of insufficient CPU, a user may experience difficulties with displaying too many videos simultaneously
(examples: running over 20 full high resolution videos at the same time, fast forwarding multiple full high definition
videos at the x16 speed, etc.). In this instance, cameras are switched to a Low Resolution stream. As a result, CPU will
yield a much smoother playback.
Additionally, it is possible to choose resolution manually. To do so, Right-Click on Scene's empty space and choose
Change Resolution... The changes are applied once to the entire Layout and will be reverted back to Auto whenever a
user re-opens Layout.
Note: this feature requires support of camera dual-streaming.
Lastly, DW Spectrum offers significant bandwidth savings by auto-pausing video. If viewing video from Camera in
fullscreen, the video will be paused due to inactivity after a certain period of time. To set this option, open Main Menu,
go to Local Settings -> General and check Auto Pause Video, then set the desired time interval.
Navigating through Archive and Live
It is very easy to navigate through Live and Archive in DW Spectrum. Here are some tips and shortcuts.
IMPORTANT. It is only possible to navigate through recorded fragments (chunks). Position Slider to the dark
area will jump to the next available recorded fragment (displayed in green on Time Line).
By default, all Cameras are set to display Live if opened for the first time.
Note: all Users are allowed to view cameras Live. However, to view Archive, Viewers must have the appropriate
permissions.
Search Archive:
 Click on any desired position on Time Line or Time Scale.
 Drag Time Slider to the desired position. The picture will refresh while dragging.
Time Scale navigation:
 Zoom Time Scale using Mouse Wheel for finer selection
 Move Time Scale Scrollbar
 Double Click on Time Scale Scrollbar to zoom out
Go to Live:
 Press LIVE or L
 Move Position Slider all the way to the right