User guide
19
Cisco TelePresence PrecisionHD Camera PrecisionHD Camera User guide
D14640.04 PrecisionHD 1080p-720p Camera User Guide, July 2011.
© 2010-2011 Cisco Systems, Inc. All rights reserved.
www.cisco.com
Controlling cameras using the
VISCA™ protocol
The information in this chapter applies to:
• PrecisionHD 1080p 12X camera
• PrecisionHD 1080p 4X camera
NOTE: Some of the VISCA™ commands do not apply to the
PrecisionHD 1080p 4X camera. You will nd 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.tandberg.com/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 ow control
• No software ow control
All the RS–232 parameters except speed are xed and not user congurable. The speed may be
changed by issuing the Speed command dened 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.
Contents
Appendices
Introduction
The physical interface
Connecting the camera
Video output formats
Daisy chaning
Appendices