•••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• Glossary
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Glossary
• I/O terminals
Terms used for referring to both input and output.
• RS-232C
Connection standard used for handling data between de-
vices such as a PC, modem, etc. A standard when con-
necting a PC and modem. The upper limit for the commu-
nication speed of this standard is 115.2kbps and the maxi-
mum transfer distance is 15m. Since this standard only
defines the roles and physical characteristics of the con-
nector pins, there are various types of connectors such as
25-pin, D-sub, etc.
• Copy
Term used when copying part of data to an external stor-
age media. The term “copy” in this manual refers strictly to
the process of taking out only the data before and after
failures from continuous video to a Compact Flash Card or
video for analytical purposes.
• Compact Flash Card (CFC)
One of the standards for a compact memory card. The
Compact Flash Card has such merits as strong durability
and ease of handling.
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Relation of recording operation to the number of cameras and recording interval settings
The recording pattern of this unit is as illustrated in the diagram below. Image data input from all the connected cameras
is recorded sequentially at a rate of [number of cameras x recording interval]. (25P recording interval during normal
recording.) For example, when 4 cameras are recording at intervals of 1 second, the unit takes four seconds to receive
one cycle of image data from the cameras. When this data is played back on a single-screen, the display is refreshed
once every four seconds.
C4-2
C3-2
C2-2
C1-2
C4-1
C3-1
C2-1
C1-1
12.5P
4 seconds
4 seconds
12:00:00~
12:00:04~
12:00:08~
C1-3
Circuit recording interval per camera
[ recording interval x # of cameras ]
1 second x 4 cameras = 4 seconds
Examples of time displayed
during playback.
• Hard disk drive (HDD)
Storage device using the same magnetic recording proc-
ess as tapes and is used in PCs. An aluminum disk coated
with magnetic materials is used on the surface as the stor-
age medium and since there is no contact during record-
ing/playback, there is no head wear. Data search is also
quick since recording is performed in numbered sections
called sectors.
• Media
Term was originally referred to media that transmits infor-
mation. Media mostly refers to hard disks, floppy disks,
MO disks, magnetic tapes, and are commonly referred to
as storage media. Media types are largely categorized by
the recording method, such as optical disks, magnetic op-
tical disks, magnetic disks, etc.
• Capacity
Term to indicate the amount of data that can be stored in a
storage device such as memory, disk, etc., and unit is in-
dicated in B (bytes).
• Restore
Term referred to when copying data that has been backed-
up in a peripheral recording device, etc., to the built-in hard
disk of the unit.
Glossary
