17
6.2.5
Quad Display
•
Press the
QUAD
key to display all four camera inputs on
the system monitor screen. Each quadrant displays the video
from its respective camera. The four quadrants are separated
by a black border.
■
The titles of the camera 1 are displayed in the bottom
right corner of the screen.
■
The titles of the camera 2 are displayed in the bottom
left corner of the screen.
■
The titles of the camera 3 are displayed in the upper
right corner of the screen.
■
The titles of the camera 4 are displayed in the upper
left corner of the screen.
6.2.6
Alarm Function
When an alarm input is generated, the relevant camera image
appears as a full screen image and the message
*
ALARM
*
flashes on screen.
For a generated alarm the sequence of operation is as follows:
1. MON output and VCR output are changed to display the
full-screen image of alarmed channel.
2. The message
*
ALARM
*
flashes on the screen.
3. If a second alarm input is generated, each alarm screen
appears for 2 seconds in turn. Press the channel key again.
4. The alarm audible beeper is activated (if BEEPER status is
ON
).
5. The alarm output (Relay Output, Trig Output) is activated
automatically.
To reset a single alarm:
•
Press the
key.
To reset one of multiple alarms:
•
Press the Camera (
1, 2, 3,
or
4
) key, then the
key.
The duration of the alarm mode is determined by one of these
conditions:
•
If the duration of the alarm input is less than the Alarm
Dwell Time, the unit remains in the alarm mode for the
Alarm Dwell Time.
■
Press the
key to cancel the alarm instantly.
•
If the alarm input persists for more than the Alarm Dwell
Time, the unit remains in the alarmed state only as long as
the Alarm Dwell Time.
■
Press the
key to cancel the alarm instantly.
•
If an Alarm Dwell Time is set to the
HOLD
mode, the
alarm remains active until the alarm is reset by the operator.
■
Press the
key to cancel the alarm.
•
If an Alarm Dwell Time is set to the
FOLLOW
mode, the
alarm remains active until the alarm is reset.
■
Press the
key to cancel the alarm instantly.
6.2.7
Video Loss Alert
The LTC 2376 and LTC 2377 may be programmed to produce
an alarm if the video signal to any of the four camera channels
is lost. (
NOTE:
Video Loss Alert must be
ON
for the respective
channel). A loss of video produces the following effects:
•
The monitor screen is changed to QUAD screen image and
the message
VD LOSS
is displayed on-screen. After reaching
the Alarm Dwell Time, if applicable, the display will return
to its previous full-screen.
•
The VCR output changes to the same status as the monitor
display.
•
If BEEPER status is
ON
, the alarm sound is activated and
the alarm output (Relay out, Trig out) is active for the alarm
dwell time.
■
Press the
key. The alarm is acknowledged, but
the
VD LOSS
remains on-screen until the video input
is restored.
•
To disable the
VD LOSS
message display on unused channels,
set the dwell of the unused channels to the SKIP setting
6.2.8
Computer Remote Control
The LTC 2376 and LTC 2377 use a very simple command set
with each command consisting of three characters. The first
character in all cases is the slash or virgule(/). The unit looks
only for a three-character command with an initial slash. It
ignores all other characters. If a mistake is made in entering a
command, just type in another slash character followed by the
appropriate characters for the desired command. The
commands are listed in the following table -
RS-232
Commands
.
Signal format is as follows:
•
Data Format:
1,200 Baud/8 Data Bit/No Parity/One Stop Bit
•
Mode:
Half Duplex Mode (The unit is not Echo Received
Character).
ALM ( )
ALM ( )
ALM ( )
ALM ( )
ALM ( )
ALM ( )
ALM ( )
Table - (RS-232 Commands)
COMMAND
RS-232 CODE
VCR Input
/VR
Enter the Programming Mode
/ME
Sequence/Reset
/SR
Camera 1/Up
/1U
Camera 2/Down
/2D
Camera 3/Left
/3L
Camera 4/Right
/4R
Quad Display/Enter
/QE
