SW-D7000U, 9CH. COLOR VIDEO MULTIPLEXER
JVC PROFESSIONAL, IMAGING PRODUCTS 73
In Figure 2, the camera’s luminance levels are low and have a smaller range, so that it will be more difficult
for the user to see detail both when viewing live displays of the camera as well as when reviewing multiplexed
recordings of the camera. This camera will also not be suitable for video motion detection, because relatively
few Grey levels will be digitized and changes with time are less likely to be detected by the VMD circuits.
FIGURE 3
In Figure 3, the camera’s lens or its AGC is out of adjustment, resulting in high luminance levels. As a result,
detail in the scene is likely to be lost during multiplexed recording, and video motion detection will be
ineffective.
Benefits of the camera scope:
"
An inexperienced installer can use it to check the input video signals to the multiplexer, without
the need for additional signal measuring equipment and its associated cost. This is especially
useful if intrusion detection is intended.
"
Troubleshooting of the system after installation is simplified.
"
If a problem is reported for the system, the camera scope displays are so simple that a technical
support person who is remote from the site can easily get an untrained person on the site to
describe the camera scopes. This will then enable a diagnosis to be made without incurring the
time and expense of a visit to the site.
4.14
VCR SETUP
This option is used to specify the type of VCR that is connected to the multiplexer. You can also
define the VCR as to whether it has a switch input (VEXT) and negative or positive leading edge.
The choices are;
S-VHS/Composite
Switch Input ON/OFF
Switch Edge
Signal Level
