Digital BUS-WATCH
®
52
Radio Engineering Industries, Inc.
640333
Rev 0 -- 1/1/2006
RECORD ERROR:
This function is activated when the Master Controller PCB can not
communicate with the Video PCB, generally characterized by failure of the Video PCB
or the ribbon bale connecting the 2 PCBs together.
DISK ERROR:
This function is activated when the Video PCB can not store the video,
audio, and database information to the drive. This alarm can be heard as a beep, for a
bad sector or track, or a constant tone for a lack of a working drive.
DISK FULL:
This function is activated when the Hard Disk Drive reaches the physical
end of the drive. This function will turn on the audible alarm for a second, then continue
on to the beginning of the drive and start recording video over again. No frames of
video are lost during this transmission.
ALARMS FULL:
This function is activated when the number of panic button presses
stored on the drive is 255. This audible alarm indicates to the user that further panic
button presses will not mark the drive. The marked events are overwritten in a first in –
first out method and the alarm goes off when there are less that 255 events.
VIDEO LOSS:
This absolute function is used when there at least 4 cameras connected
to the DVR. The Video Loss audible alarms have 2 modes, one absolute and one
conditional. The conditional Video Loss alarm determines the number of cameras
connected to the system at the time of the ignition, and sounds an alarm if one or more
of the cameras stops producing video during normal operation. The absolute function
sounds an alarm any time it is not seeing all 4 video signals.
Overwriting Video
First-In, First-Out
The Digital BUS-WATCH®
IV
DVR records video in a FIFO (First-In First-Out)
manner. The oldest video is overwritten by the newest video. When the DVR is
stopped by manually using the STOP button on the face of the recorder, and then sent
into playback mode by pressing the PLAY button, the DVR always goes to the oldest
recorded video. By pressing the rewind button, REW, the DVR will play back the
newest video in reverse order.
Overwrite Protection
The Digital BUS-WATCH®
IV
DVR does not allow for Overwrite Protection on
video events. This avoids the situation of having all the video space on the hard drive
being marked as ‘protected’, and not having enough room to store any new events. In
order to assure that the last recorded video will be present on the drive, without having
to have the user ‘manually clear the events’, the video is only kept on the drive until
overwritten. Video being overwritten is the only way to remove video from the drive,
there is no erase function otherwise. In situations that require extended video record
time for event preservation, the user has several options. One option is to use the
