Videotec SM328B - Manual (Page 22)

3.4.11.2 Excluding video inputs
(Is the matrix used in a shopping mall? Is the public able to see some of the monitors?)
Excluding cameras when there are monitors for the public is described in detail in section 6.1 Excluding
video inputs, page 32.
When the matrix is used in particular public places, such as shopping malls where one of the monitors is
accessible to the public, each camera selected by the Master Operator may be replaced by a substitute
camera. This is useful for preventing the ill-intentioned from watching a monitor, made public as a
deterrent, and getting to know the intentions of the security personnel.
If exclusion is on, each camera selected by the Master Operator will be substituted in all the switching
sequences of the other monitors not in alarm status.
There are two types of video signal exclusion:
• manual exclusion: there is immediate exclusion when the Master Operator selects a camera in manual
mode
• telemetry exclusion: exclusion is enabled by movement of the pan & tilt/dome associated with the last
selected video input. Only keyboard number 1 will activate telemetry exclusion; each receiver should
have the same number as the respective video input (camera 1 with receiver 1, camera 2 with receiver
2 etc.)
In either case, while the camera is excluded the Master Monitor displays a reminder that to exit Exclusion
mode
q
should be pressed.
It is the operator's job to re-position the pan & tilt as appropriate before restoring normal operation.
Auto-return time (from 1 to 60 minutes) is used to return the system to normal mode (without camera
exclusion) after a fixed time following selection by the Master Operator. If set to 0 it is disabled and the
system does not return to normal mode.
3.4.12 Cameras present and Texts
The matrix allows 32 cameras to be connected. Each camera has an ID text and can be monitored for
presence of the video signal (video loss).
Defining the prese cameras allows automatic monitoring of video loss and control of the switching
sequences.
3.4.12.1 Enabling/Disabling video inputs
During setup it is necessary to set the video inputs that are used (cameras present, identified by the letter
P) as enabled and the video inputs that are not used (no camera, identified by the – sign) as disabled.
When a camera is not connected it is still possible to select it and use it inside the switching sequence but
the video loss, if any, will be ignored.
To define each video input use the joystick or the
+
/
-
keys to scroll through the list of 32 cameras;
press
1
to enable the video input or
0
to disable it.
3.4.12.2 Changing the camera identification text
Each camera is identified by a string of text with max. 28 characters. When possible part of this text is
shown in the various menus (when defining the switching sequences for example) to make setup control
easier.
The
E
key is used to start modification of the ID text indicated by the cursor.
The text is inserted in the same way as for a cell phone: pressing a numeric key quickly several times will
run through the characters associated with the key; a pause is used to pass to the next character.
E
inserts a space and
C
erases the last character to be inserted.
+
and
-
are used to change the
characters associated with the numeric keys.
• 3. Setup Page 20/65 MNVCSM328A_0438