Cisco TelePresence PrecisionHD Camera
D14640.12 Cisco Telepresence PrecisionHD Camera User Guide TC6.2, August 2013.
Copyright © 2010–2013 Cisco Systems, Inc. All rights reserved.
27
User Guide
Controlling cameras using the
VISCA™ protocol
The information in this chapter applies to:
• PrecisionHD Camera 1080p12x
• PrecisionHD Camera 1080p4x
• PrecisionHD Camera 1080p4x S2
• PrecisionHD Camera 1080p2.5x
NOTE:
Some of the VISCA™ commands do not apply to the
PrecisionHD 1080p4x/4xS2 and 1080p2.5x cameras. These
commands are marked with an
*
(asterisk) throughout this
section.
NOTE:
The VISCA™ commands for PrecisionHD 720p camera
can be 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 of 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
You can find a list of all the available commands and inquiries
together with the results and comments on the following pages.
Contents
Introduction
The Physical Interface
Connecting the Camera
Appendices
Daisy Chaining
Video Output Format
Appendices
