10
June 5, 2003
Pan, tilt, and zoom (PTZ) control
To set up PTZ control for Silent Witness Vortex and Pelco® PTZ
cameras that use the Pelco D protocol:
1.
Go to the Remote Access screen (MENU
➤
System Setup
➤
Remote Access).
2.
In the RS-485 Setup area, set the DVMS Address (1 to 249).
3.
Set DVMS is Master when the DVMS controls the dome or
DVMS is Slave when an external controller (Quarterback)
controls the dome.
4.
In the Baud Rate field, select a baud rate that is identical to the
operational baud rate of the PTZ camera.
5.
In the Dome Address field:
a.
Select a camera.
b.
Set the dome address.
c.
Select the desired protocol (Vortex or Pelco).
6.
Repeat
step 5
for each PTZ camera.
Storage drive partitions
You can connect up to seven storage devices to the DVMS 1600/800
unit. These can include:
•
Up to four internal hard drives (IDE or SCSI), one of which can
be removable
•
An optional storage device (CD-R/W or DVD drive, SCSI drive
and tray) in combination with up to three external devices (SCSI
or SCSI RAID)
Note
If you add additional drives or upgrade system drives
after the initial system configuration, you must reformat
the storage system. This results in permanent,
irreversible data (stored video) loss.
To avoid reformatting the system, Silent Witness
recommends that you add an optional archive drive.
For detailed information on installing and configuring additional
system storage drives, refer to the DVMS 1600/800 Duplex Internal
Drive Upgrade Guide.
Calculate disk space required
To determine how much disk space is required for storing timelapse
and event data, use the following two formulas and add the results
together to get a total amount of disk space needed.
For timelapse:
For events:
For total timelapse and events:
Therefore, in this example, one week of recording timelapse and
events requires 54 GB hard disk storage space.
Total hours x Record rate (fps)
x 1.26 = Timelapse disk space (GB)
Image quality (compression)
In this example:
168 hrs x 5 fps
20
x 1.26 = 52.92 (approximately 53 GB)
Image size x Record rate (fps) x number of seconds = Event disk space (bytes)
Event space x no. of events per day x no. of days = Total events disk space
In this example:
17,500* x 3 fps x 5 secs = 262,500 bytes
262,500 x 500 x 7 = 918,750,000 (or approximately 1 GB)
* one field is approximately 350 Kbps. Therefore, the stored image
size is field/compression = 350 K/20 = 17,500.
Timelapse disk space + total events disk space = Total disk space
In this example:
53 GB + 1 GB = approximately 54 GB for one week (168 hours)
of timelapse and events recording.
