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6.3.3 CPU Module Selections
To access the circuit board, remove the cover & lid as described
in the Cover Removal section. The batteries and the two 8-
position system configuration DIP switches (S0201 and S0202)
near the front of the unit will now be visible. Change only the
desired CPU DIP switches based on the features described in the
FACTORY DEFAULT SETTINGS section of this manual.
6.3.4 Battery Replacement
CAUTION: Lithium batteries should be replaced by qualified
service personnel only.
If the batteries have reached the end of their useful life, the Time
and Date portion of on-screen display will begin to alternate
with an indication of "?? ?? ??". The LED on the front panel of
the unit will also light indicating a low battery condition. Gain
access to the circuit board as described in the above section then
follow the instructions found in the Maintenance section of this
manual for replacement procedures.
6.4
Termination Practices
Video from every camera should be "terminated" with a 75 ohm
resistance. Each video line should be terminated exactly once. If
video from a given camera is going to several different devices,
only the last piece of equipment on the video line should be
terminated.
6.4.1 Video Terminations
The main circuit board has DIP switches for selecting the
termination of each individual video line. To terminate an input
line, make sure that the appropriate DIP switch on the video
module ON (Factory Default setting). If non-terminated
operation is required for looping purposes, turn the switch OFF.
See the table below to determine the DIP switch numbers that
correspond to video input.
Video
Switch
Switch
Inputs
No.
1-4
S0801
1-4
5-8
S0802
1-4
9-12
S0801
5-8
13-16
S0802
5-8
17-20
S0803
1-4
21-24
S0804
1-4
25-28
S0803
5-8
29-32
S0804
5-8
Video Input Termination Switches
If looping video inputs are desired, the LTC 8200 and the LTC
8300 Series require an optional LTC 8808/00 patch panel (For
the LTC 8100 Series, the looping BNCs are included on the
unit). A single LTC 8808/00 provides looping capability for all
16 (LTC 8200) or 32 (LTC 8300) video inputs. Refer to the
section on Looping Video Connections below if necessary.
Just like camera inputs, monitor outputs on the Allegiant system
are designed to be terminated. Each monitor output expects to be
connected to a 75 ohm load. This is the regular load typically
provided by a normal monitor. If a monitor output line is
"looped" through several monitors or other equipment, the
system installer should make sure that only the last unit on the
line is terminated.
Systems
LTC 8100, LTC 8200, LTC 8300
LTC 8100, LTC 8200, LTC 8300
LTC 8200, LTC 8300
LTC 8200, LTC 8300
LTC 8300
LTC 8300
LTC 8300
LTC 8300
6.5
Looping Video Connections
The Allegiant series has outputs available for video input looping
connections. Looping connections for LTC 8200 and LTC 8300
require the use of the optional LTC 8808/00 Video Interconnect
("Patch") Panel. The patch panel provides
32 BNCs for video connections. Patch panels are connected to
the rear of the main bay using the supplied ribbon cables. Each
cable can carry video for up to 16 cameras. For LTC 8300 Series
systems, 2 cables can be attached to the patch panel to support up
to 32 cameras. Each ribbon cable should be attached to the
appropriate "VIDEO" connector on the rear of the main bay.
Typical Use of LTC 8808/00
Upper
LTC 8809/00 Cable
Video Interconnect Panel
6.6
Keyboard Hookup
Connect a maximum of 4 (LTC 8300 or LTC 8200 Series) or 2
(LTC 8100 Series) system keyboards to any of the keyboard ports
(modular phone type jacks) provided on the rear of the main bay,
but be sure to at least connect a keyboard to port #1.
Note that LTC 8552/00 RS-232 type keyboards do not get
connected to the standard keyboard ports. The LTC 8552/00
keyboards connect to the Console port via a LTC 8712 Series
Port Expanders. Note that when LTC 8552/00 type keyboards
are connected to the system, the corresponding standard keyboard
ports are automatically disabled.
Each keyboard is supplied with a 3 m (10-foot) cable for local
hookups. The Allegiant systems can provide power to keyboards
up to 30 m (100 feet) away using the optional LTC 8556/00
hookup cable. For distances of up to 1.5 km (5000 feet), the
optional LTC 8557/00 hookup kit is required, which is supplied
with a remote power pack and requires user-supplied shielded
twisted pair (Belden 9841 or equivalent) for communication.
6.7
Biphase Control Code Output Connections
The Allegiant systems provide separate outputs (16 for LTC
8300, 12 for LTC 8200, 8 for LTC 8100 Series) for driving
remote receiver/drivers, switcher/followers, and satellite systems.
Either "star" or "daisy chain" wiring configurations may be used.
Connect shielded-twisted-pair cable between the camera site
receiver/driver locations (or other accessory device) and any of the
outputs provided on the rear panel of the Allegiant. Maximum
transmission distance is 1.5 km (5000 ft) using 1 mm2 (18
AWG) shielded-twisted pair (Belden 8760 or equivalent). Twelve
contact removable screw terminal blocks are provided with 4
separate connection groups per block. Each group provides three
connections - "+", "-", and "S" (Shield). Do not mix connections
between groups, i.e. - connecting one wire of the cable to the "+"
of one group and another wire of the same cable to the "-" of
20
LTC 8300
Lower
LTC 8809/00 Cable
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