Bosch Appliances 3922 988 43318 manual DCN Camera Control, Allegiant Video Switcher

Digital Congress Network Installation and Operating Manual Chapter 6 - DCN Camera Control en 6-1

Chapter 6. DCN Camera Control

The ‘DCN Automatic Camera Control (DACC) directs video cameras toward speaking conference participants (e.g. delegates chairman etc.) to display them on a monitor.The DACC has two possibilities to connect cameras and monitors to the system.

•Via Allegiant Video switcher (AVS) to connect more than one camera and monitor.

•Direct Camera Control (DCC) to connect one camera and one monitor.

6.1Allegiant Video Switcher

To provide ‘DCN’ Automatic Camera Control Allegiant Video switchers (FIG 6-1)and their associated equipment are used. For use in DCN stand-alone or PC operator controlled systems, the Video switcher in combination with the relevant software modules allows video cameras to be configured for switching and directing towards speaking conference participants (i.e. delegates, chairman etc.) for display on monitor screens.

The Allegiant Video Switchers control systems and control keyboards are controlled via the DCN software and programmable via a combination of the Allegiant keyboard and DCN GUI software modules for DACC in Stand-alone and PC-controlled systems. The maximum number of video inputs supported by the DCN software is 256.

The following table gives the range of applicable Allegiant Video Switchers.

Series	No. of	No. of	Max. No. of
	Video inputs	video outputs	keyboards
LTC 8100	8	2	2
LTC 8200	16	5	4
LTC 8300	32	6	4
LTC 8500	64	8	8
LTC 8600	128	16	16
LTC 8800	256	64	32

The Video Switcher series LTC8200 for example provides 16 camera inputs, and 5 monitor outputs. Using the Video switchers signal distribution ports, connection to on-site receiver/drivers (AutoDome™ camera’s with pan/tilt motors), provide operator control of pan, tilt, zoom, multiple pre-fix positions, four auxiliaries, auto-pan and random scan.

The following table provides a survey of type numbers for the range of compact (one bay) Allegiant video switchers:

Series	19” rack height	European version	US version
		(220 - 240 VAC)	(120 VAC)
LTC 8100	1U	LTC 8100/50	LTC 8100/60
LTC 8200	1U	LTC 8200/50	LTC 8200/60
LTC 8300	2U	LTC 8300/50	LTC 8300/60

Refer to the CCTV Systems Data Book for Allegiant Video switchers, versions LTC 8500, LTC 8600 and LTC 8800.

NOTE: All Allegiant switchers shall have firmware 7.2x or higher.

6.1.1Allegiant Switcher Control Keyboards

At least one keyboard is required for manual control and programming of the Allegiant switcher. Using the keyboard enables camera preset positions to be defined, manual override of automatic positions and picture selection.The recommended control keyboard is the LTC 8555 with variable speed joystick and reduced size.

6.1.2Cameras and Monitors

A combination of fixed and orientable cameras with remote positioning and zoom lenses are available for connection to the video switcher.The maximum number being dependent on the number of available video inputs. Colour cameras are preferred, providing composite video outputs according to the PAL B and NTSC standards.

Orientable cameras must accept bi-phase control signals as generated by the Allegiant video switchers. Upon start up, when no microphones are activated or during camera movement from one position to the next (if enabled in the software) an “overview” picture is shown on the connected video displays (e.g. monitors, large screen TV’s, video projectors).This picture is provided by the “overview” camera (fixed (preferred) or orientable) which is always connected to video input No.1. If an orientable camera is used (preferred type ‘AutoDome’ system) the highest available preposition is used (software dependent).

NOTE: For preferred camera types, both fixed and orientable, refer to the DCN Confer- ence and Discussion Systems Data catalogue.

Video displays, accepting composite video signals according to PAL B or NTSC standard are required for showing the picture to the operator and audience. A 14” or 17” monitor for the operator with high or at least medium video performance is preferred.This monitor must always be connected to video output No.1 of the used video switcher. For preferred monitor types refer to the DCN Conference & Discussion Systems Data catalogue.

Bosch Security Systems 04-2003 3922 988 43318 en Allegiant Video Switcher