Vista SmartDisc 02 VLS-02DR Series, Installation Instructions Manual

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4 Commissioning
30 Vista SmartDisc 02
4.2 General configuration information
■ Configure your system with all cameras connected and all final camera
perspectives set, for best results. This enables precise calculation of images
sizes detected in SmartDisc 02 configuration mode.
■
If possible, use conditional refresh mode (differential image compression).
This method is more efficient than the option single image compression.
SmartDisc 02 only records conditional refresh images if the interval
between two consecutive images is not greater than 10 seconds. For larger
intervals, significant image changes are assumed and therefore full image
recording is activated. The advantages of conditional refresh mode are:
■
The available storage capacity is used more efficiently. This increases
the period available for recording images.
■
Recording speed is increased.
■
Online evaluation is faster. This is of advantage when using narrow
bandwidth communication paths such as GSM, MODEM, or ISDN.
■
It is recommended to Record preview images if narrow bandwidth
communication paths such as GSM, MODEM, or ISDN are to be used for
evaluation.
■
Camera noise, e.g. caused by poor lighting, can cause excessively large
images, even in conditional refresh mode - factory setting - as camera
noise is interpreted as image change.
■ Image quality can be set separately for each camera input, and for image
transmission and image recording. Additional options for resolution and
multi image display mode are available for image transmission. Full format
live transmission allows adjusting resolution by the viewer during
transmission.
■
If you want to control several cameras by integrated motion detection,
consider using external motion detectors. The integrated motion detection
is not designed for outdoor detections and should therefore be reserved
for indoor cameras. This helps avoid false alarms.
■
Integrated motion detection allows you to set different levels of sensitivity
for controlling recording and alarm forwarding to a SmartControl station.
■
When defining pre-alarm and post-alarm sequence: New messages
generated during an event (e.g. caused by alarm or motion detection) will
be ignored at first and will only be processed after post-alarm time or after
adjustable retrigger time is up.
■
The number of events will be reduced by the frame storage device if
storage space allocated to any camera for any single event is less than
1 MB.
■
The device gives highest priority to image recording triggered by input
state change, i.e. when Edge + or Edge – recording is active. If the device
detects a status change at any recording input, it will interrupt recording
triggered by any different status, by status change, or by integrated
motion detection in any event.
■
For the device to positively detect control input states and status changes,
circuit time must be at least 0.5 seconds.