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SW-D7000U, 9CH. COLOR VIDEO MULTIPLEXER
Record Rate: (This setting is only used in ACTIVITY DETECTION).
Your multiplexer shares one VCR between many cameras.
which normally provides 60 fields a second must be time sliced and reduced to a rate of far fewer
fields every second to allow the other cameras to insert fields into the same video stream going to the
VCR. (Refer to the explanatory figure in the RECORDING section of this manual.)
The lowered update rate for each camera is not a problem if there is little movement in the scene, but
if there is activity in the camera view it is always preferable to get as many updated fields of the
activity as possible so that important activity events are recorded.
The SW-D7000U solves this dilemma in two ways:
1.
It has a very fast, optimized update rate to tape, which at 2-hour alarm speeds is about 3
times faster than most other multiplexers.
2.
It allows the rate of update of each camera to tape to be automatically adjusted by the
system if there is ongoing motion within a camera's field of view. In this way, cameras
without activity are recorded less often and cameras with frequent and continuous activity are
recorded more often and so can capture more of the activity.
A unique feature of the SW-D7000U is that the increase in update rate can be set by the programmer
in this RECORD RATE sub-menu. Cameras with activity can be recorded twice (2X) as often they
would normally be recorded, or four times (4X) as often, or they can be INTERLEAVED.
allows programmers the flexibility to set up the system according to the requirements of their
particular installation.
NOTE:
The record list and record rate can also be modified by an active alarm. A record list
update resulting from an active alarm input will always override any record list
modifications which resulted from sensing activity. (See ALARMS sub-menu RECORD
MODE)
There are four choices of RECORD RATE for activity:
"
NONE - If most cameras are expected to have motion at the same time, or if the particular
camera scene is not important yet has a lot of motion.
"
2X - If not all cameras are connected.
"
4X - The factory default setting.
"
INTERLEAVED - If very few cameras will have motion at any one time.
Relay Output:
Two relay outputs are provided to enable the programmer to program automatic external actions
such as a speed change on the VCR, or floodlights, or audio announcements and so on. The relay
outputs are rated at 500 mA. They are provided in both the normally open (N/O) and normally closed
(N/C) configuration on the rear panel of the unit, and are isolated.
The two relays can be activated by activity detection, by active alarms, video loss or by Macro
functions. There are four choices on relay output for ACTIVITY on each camera:
"
None – no relay is activated
"
Relay 1
"
Relay 2
"
Relay 1&2.
The factory default setting for Alarm Output Relays is as follows:
64
JVC PROFESSIONAL, IMAGING PRODUCTS
As a result, the video from a camera
This
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