Cisco Systems manual 24

Cisco TelePresence PrecisionHD Camera					PrecisionHD Camera User guide
Contents	Introduction	The physical interface	Connecting the camera	Video output formats	Daisy chaning	Appendices

Controlling cameras using the VISCA™ protocol

The information in this chapter applies to:

•PrecisionHD Camera 1080p12x

•PrecisionHD Camera 1080p4x

•PrecisionHD Camera 1080p4xS2

NOTE: Some of the VISCA™ commands do not apply to the PrecisionHD 1080p4x/4xS2 cameras. You will find these commands marked with a * (star) throughout this section.

INFORMATON: The VISCA™ commands for PrecisionHD 720p camera is found in the MXP Reference User Guide for System Integrators. Go to: http://www.cisco.com/go/ telepresence/docs

The camera uses an RS-232 control interface that resembles the Sony VISCA™ protocol. The VISCA protocol (VIdeo System Control Architecture) is a Sony protocol for synchronized control of multiple video peripherals.

VISCA™ is a trademark of Sony Corporation

RS–232 Parameters

At startup, the communication parameters for the RS–232 interface must be set to:

•9600 bits per second

•8 data bits

•No parity

•1 stop bit

•No hardware flow control

•No software flow control

All the RS–232 parameters except speed are fixed and not user configurable. The speed may be changed by issuing the Speed command defined on the following pages.

All control bytes are pure binary information, i.e. the control bytes are not ASCII-encoded.

RS–232 Commands and inquiries

A list of all the available commands and inquiries together with the result and comments are found in the table on the following pages.

D14640.09 PrecisionHD 1080p-720p Camera User Guide, June 2012.	24	www.cisco.com
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