EN
| 9
LTC 2020/91 Series |
Instruction Manual
|
Operating Controls and Connectors
3.4
Connecting the Composite Video
Signal to the Monitor
There are four (4) BNC connectors located on the rear
of the monitor, for the composite Video 1 / Video 2
inputs and outputs. Video load impedance should be
placed to low while operating in a single connection
mode. The load impedance switch should be placed to
high when a video output is connected to another
display device.
Note: High impedance prevents video loss in loop-
through connection. The last monitor should be
selected on the low impedance.
3.5
Connecting Audio to the Monitor
There are four (4) RCA connectors; two (2) for audio
inputs, and two (2) for looping-through to other video
monitors.
Note: The audio IN/OUT is not dependent upon the
Video input.
4.0
OPERATING CONTROLS AND
CONNECTORS
Item Control /
Switch
Function
Front Panel
(1)
POWER
Switch
This switch allows you to toggle the power to
the monitor on/off.
(2)
Power-on
Indicator
This indicator illuminates Green when
powering the monitor on.
(3)
Contrast
This allows you to adjust contrast between the
black and white portion of the picture.
(4)
Brightness
This allows you to adjust the brightness of the
picture. Recommended to be used in
conjunction with the CONTRAST control (3).
(5)
H-HOLD
When the picture has slanting horizontal bars,
this control allows you to rotate in either
direction until a stable picture is obtained.
(6)
V-HOLD
When the picture is rolling up or down, this
control allows you to make adjustments until a
stable single picture is obtained.
(7)
Volume
This allows you to adjust the audio sound.
(8)
CVBS 1 /
CVBS 2
Select Switch
This switch allows you to toggle the Video 1 or
Video 2 connectors for a signal feed-through.
(9)
Audio 1 /
Audio 2 Select
Switch
This switch allows you to toggle the Audio 1 or
Audio 2 connectors for a signal feed-through.
(10)
Underscan
Select Switch
This switch allows you to see the entire picture
when set to UNDER.
Rear Panel
(1)
AC Input
Socket
This allows you to connect the AC power cord
to this socket and to a mains outlet.
(2)
Video 1 Load
Impedance
Switch
This allows you to set the switch to V1-H if V1
out is connected to another display device or
set to V1-L.
(3)
Video 2 Load
Impedance
Switch
This allows you to set the switch to V2-H if V2
out is connected to another display device or
set to V2-L.
(4,5,6,
7)
Video IN/OUT
(Video 1 /
Video 2
Connectors)
This allows you to receive the output from a
camera, VCR, or another monitor, and for
connecting the Video output of the monitor to
the Video input of another monitor or VCR.
(8,9,
10,11)
Audio IN/OUT
Connectors
This allows you to receive audio from a VCR,
another monitor, or other equipment. A loop-
through connection is available to input other
equipment.
Video 1
Video 2
IN
OUT
OUT
IN
V1-H
V1-L
V2-H
V2-L
IN
Audio 1
Audio 2
OUT
IN
OUT
Bosch Security Systems | June 24, 2005
