General Configuration Information - Xtralis HeiTel CamDisc HNVR Product Manual

CamDisc HNVR Product Guide
4.2

General Configuration Information

Configure your system with all cameras connected and all final camera perspectives set, for best results.
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This enables precise calculation of images sizes detected in CamDisc HNVR configuration mode.
If possible, use conditional refresh mode (differential image compression). This method is more efficient
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than the option single image compression. CamDisc HNVR 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
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recording images
Recording speed is increased
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Online evaluation is faster. This is of advantage when using narrow bandwidth communication paths
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such as GSM, MODEM, or ISDN
It is additionally recommended on analogue video signals to Record preview images if the evaluation is to
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be made over narrow bandwidth communication channels such as GSM, MODEM, ISDN.
Camera noise, e.g. caused by poor lighting, can cause excessively large images, even in conditional
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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
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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 recording on several cameras using movements, i. e. the integrated motion
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detection on analogue cameras, consider using external motion detectors. The integrated motion
detection is not designed for outdoor recordings and should therefore be reserved for indoor cameras. This
avoids false alarms.
The integrated motion detection for analogue cameras allows you to set different levels of sensitivity for
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controlling recording and alarm forwarding to a CamControl station.
When defining the pre-alarm and post-alarm sequence, please note that new messages generated during
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an event (e.g. caused by alarm contacts or the integrated motion detection) on analogue cameras will be
ignored at first and will only be processed after the post-alarm time or after the adjustable retrigger time
has elapsed.When defining pre-alarm and postalarm 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
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camera for any single event is less than 3 MB.
The device gives highest priority to image recording triggered by input state change, i.e. when recording
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via Edge + or Edge – is enabled. If the device has detected a change on a control input, it will interrupt
recording triggered by a different status, by status change or (on analogue cameras) the integrated motion
detection in all instances. 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
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0.5 seconds.
CamDisc HNVR supports three operating modes. These are a compromise between performance and
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functionality, at the same time leaving the option to suppress certain functions, under certain
circumstances. CamDisc HNVR factory setting is Duplex mode. Operating mode overview:
Simplex = Live image transmission, or recording, or archive evaluation
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Duplex = Live image transmission and recording, or archive evaluation
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Triplex = Live image transmission and recording and archive evaluation
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For applications using several removable hard disks (for increasing storage capacity or recording time) it
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is strongly advised to use uniformly configured hard disks, to use these always in the same CamDisc
HNVR, and to provide them with unique labels. Also refer to "Removable Hard Disk" on page 25.
CamDisc HNVR is equipped with an integrated clock module with calendar feature. Maximum deviation
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at an ambient operating temperature of 40 °C is ±2.5 minutes per month. It is recommended to
synchronise the clock with PC time at regular intervals and to activate automatic adjustment to
summer/winter time.
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HeiTel by Xtralis
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