Videoswitch VDM - Manual (Page 52)

Videoswitch
VDM Digital Recorder
Vdm601t.doc
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10.4.5 Critical Alerts
If a fault condition is detected by the VDM, a red “Critical Alert” message appears on the screen. The alert is
also stored in the alert log. If the alert options have been set up correctly, an alert message indicates that
engineer attention is required to determine the source of the problem.
The red alert message may be cancelled by pressing the EVENT key and entering the event screen.
However, if the alert condition still exists afterwards, the alert message will re-appear. The alert relay stays
activated while an alert condition exists.
Most critical alerts require no user set-up. Three alert types that do require set-up by the user are detailed
here:
10.4.5.1 Cameras
Cameras that should have video present are set in this option. (Solid boxes should be displayed where
cameras are fitted and dashes where no cameras are present). If there is no video on any of the specified
cameras, an alert condition will arise. Press the
DEFAULT
key to automatically set this option to suit the
currently connected cameras.
10.4.5.2 Drive Fail
This option must be set to indicate which hard drives are fitted. If a drive that is specified either fails or is
removed, an alert condition will arise. Press the
DEFAULT
key to automatically set this option to suit the
currently installed hard drives.
10.4.5.3 Drive Full
If you wish to be notified when drives become full (if for example the drives are to be changed), set this
option. Normally, the system automatically over-records on the drives and this option should be
Disabled.
10.4.6 Camera Inputs
10.4.6.1 Brightness
The brightness of each camera may be adjusted to allow for cable losses. Press the
DEFAULT
key to set
brightness to its default state.
10.4.6.2 Colour Boost
The colour intensity of each camera may be increased to allow for cable losses. This is useful in particular
where passive transceivers are used for video transmission over twisted pair cable between the cameras
and the VDM. Press the
DEFAULT
key to set colour intensity to its default state.
10.4.6.3 Termination
Camera termination may be set here. Normally all cameras should be terminated, unless looped through to
other equipment that is terminated. Press the
DEFAULT
key to toggle all input terminations on or off, or
use the cursor keys to set them individually.
10.4.7 Remote Access
The VDM may be controlled remotely and viewed via:
• Hard wired RS485 twisted pair link to remote keyboard(s)
• Dial-up via PSTN (telephone line)
• Dial-up via ISDN (64kbit/s digital)
• Networking via Ethernet (TCP/IP)
• RS232 connection to computer
10.4.7.1 System Address
If several VDM systems are to be controlled by one keyboard, or computer, assign each a different address.