Closed Circuit Television (CCTV) System

TM 5-6350-275-24&P

The monitoring and control of all intruder detection and access control equipment is carried out by a network of Remote

Area Data Collectors. The main feature of the RADC is the STARGATE 5000 PWA (Figure 1-27), which is used in the

interior RADC or the STARGATE 1000 PWA (Figure 1-28), used in the exterior RADC. The STARGATE 1000 provides

the same information to the PMC as does the 5000 PWA, but the PWA does not have the Comms Port to-support the

IAC unit. The STARGATE PWA contains the processor and programs that monitor the sensors, key pad, card reader,

Leda PWA and the IAC PWA. Each RADC compiles a detailed list of readings and changes that are detected by sensors

and remote Ledas and periodically transmits this information to a computer within the control room known as the Central

Processing Unit (CPU). The readings are then processed and compared against a known value and stored. If the

compared value is different from the known value an alarm is generated, and the operator display screen is immediately

updated to reflect any detected changes.

Data is transferred between the remote area data collector and the communications subsystem via the Mod 2, 1200 baud

Modem. The communication system then transfers this information to the CPU through a dedicated communications

network at a 9600 baud rate. The CPU continuously monitors the communication system. Options for the

communications network include private wires, optical wires, radio schemes and the public switched telephone network

(PSTN).

The Leda Flex module interfaces with the Leda Flex Termination Module, which has 12 alarm inputs and 12 outputs, with

control functions on the outputs. The input provides alarm, tamper, and full line supervision. These units are snap track

boards which are housed within the RADC enclosure. The Leda Flex PWA communicates via the AUX 0 Port to the

STARGATE Processor PWA. Up to 31 Ledas can also be placed external to the RADC.

f. Closed Circuit Television (CCTV) System. (See Figure 1-28.) CCTV provides remote surveillance of a site by one

or more monitors which display the pictures received from a network of CCTV cameras. Each monitor can be configured

to display the pictures of a particular camera at all times or those of several cameras in a pre-defined sequence.

Optionally, the operator may use the workstation keyboard to direct the scenes of a particular camera onto a chosen

monitor.

(1) Video Switcher. The switcher is microprocessor based, and software programmable with the

software supplied as part of the switcher. The switcher is a modular system that will allow for expansion

of modification of inputs, outputs, alarm interfaces, and secondary control stations by addition of

appropriate modules. Changes or alteration of features under software control are made through on-site

software programming. The switcher retains the current program and camera monitor assignments in

the event of power loss, and does not require reprogramming to restart the system. The switcher is

programmable for switching any video input to any video output, and has a minimum switch matrix

capacity of no less than 128 video inputs.

(2) Monitors. Video monitors are monochrome monitors. Each monitor has a nine-inch cathode ray

tube (CRT) measured diagonally. The monitors have automatic frequency control and reproduce no less

than ten discernible shades of gray. Front panel controls are provided for power on/off, horizontal hold,

vertical hold, contrast, and brightness. The monitors are capable of being racked in twin mount kits side

by side in an Electronic Industries Association (EIA) standard 19 inch rack. A movable blank panel is

provided for rack mounting a single video monitor in either side of the rack. The cabinet holds up to four

monitors. The monitors may be wall or ceiling mounted.

(3) Equalization Amplifier. (Optional) The video equalizing amplifier corrects loss in video signal level

and high frequency attenuation caused by long distance video signal transmission over hard wire

systems. The amplifier has independent signal gain and equalization controls. It provides a minimum of

6 dB of video gain and 12 dB of high frequency compensation.

(4) Distribution Amplifier. (Optional) The video distribution amplifier is used when there is significant

loss in the video signal and high frequency attenuation due to long distance transmission over hard wire

lines between the video switcher and the monitors.

1-57