Videoswitch Vi400, Руководство пользователя

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Digital Recorder
25
9.1.2 Summer/Winter Time
If this menu item is set to
Automatic
, the displayed time and date will automatically
change in spring and autumn. If you are in a country with different light saving hours, you
can use this menu item to manually select summer-time (1 hour ahead) or winter-time. The
date/time setting in section 9.1 should
not be changed other than to adjust any drift in the
timekeeping of the Vi400/Vi600.
9.2 Record
9.2.1 Normal Record Mode
9.2.1.1 Days
Enter here the number of days that you wish images to be retained for before being
overwritten. The Vi400/Vi600 will automatically calculate the number of images per second
recorded to achieve this.
•
More days results in fewer images per second
•
Fewer days results in more images per second
The image rate may be viewed at any time using the
INFO-4
screen (see section 8).
Note that the actual number of days retained may vary from the programmed value,
particularly if alarms are used. This is because alarms record at the maximum record rate
and therefore use up hard disc space more rapidly. You may wish to increase the number of
days to allow for this.
The following table shows examples of overall record rates (images per second) for different
hard drive options and different numbers of days. An average image size of 18K is assumed
(medium quality).
Hard Drive
Capacity
14 days 31 days
320G 7.35 3.3
480G 18.4 8.3
750G 25 13
1200G 25 25
To get the image rate per camera, divide by the number of cameras being recorded.