User manual AXIS 241Q

[. . . ] AXIS 241Q, AXIS 241S, AXIS 241QA and AXIS 241SA Video Servers User's Manual 2 About This Document This manual is intended for administrators and users of the AXIS 241Q and AXIS 241S Video Server (firmware release 4. 30), and the AXIS 241QA and 241SA Video Server (firmware release 4. 30). It includes instructions for using and managing the Video Server on your network. Previous experience of networking will be of use when installing and using this product. Some knowledge of UNIX or Linux-based systems would also be beneficial, for developing shell scripts and applications. [. . . ] This is for the benefit of an operator, who cannot access the System Options section. Example: If the Normal state for a push button connected to an input is set to Open circuit, as long as the button is not pushed, the state is inactive. If the button is pushed, the state of the input changes to active. 38 AXIS 241Q/S/QA/SA - Pan Tilt Zoom Pan Tilt Zoom Installing PTZ Devices The Video Server supports several PTZ devices. Please see www. axis. com for a complete list of supported devices, and to obtain the correct driver. Using an appropriate cable, connect the device to your selected port (RS-232 or RS-485). These ports are available via the D-Sub connector and the I/O terminal connector, respectively. In the setup tools, go to Setup > System Options > Ports & Devices and then select either port RS-232 or RS-485 to configure. The default values correspond to the values specified by the PTZ driver. From System Options > Ports & Devices, select the port configured for PTZ and then select the video source to use with the device. If required, click the Advanced Options button to make further settings and see the online help. AXIS 241Q/S/QA/SA - Pan Tilt Zoom Note: Advanced users and application developers can also use the Axis Application Programming Interface and HTTP specification for generic control of PTZ devices using CGI commands or a TCP/IP client. Please refer to the Axis Website at www. axis. com for further information. 39 PTZ Configuration Once PTZ has been installed for the Video Server, PTZ Configuration now appears in the menu to the left along with the following submenus. Preset Positions A preset position is a pre-defined camera view than can be used to quickly move the camera to a specific location. From Preset Position Setup, use the Pan, Tilt and Zoom (PTZ) controls to steer the camera to the required position. When satisfied with the camera's position, enter a descriptive name. The camera position, iris and focus settings are then saved as a preset position. The position can be assumed at any time, by selecting the preset's name from the Preset positions drop-down list. Preset positions can be selected in Live View, from events and in Sequence mode. One position can be set as the Home position, which is readily accessible by clicking in the box beside Use current position as Home. Office Entrance (H). 40 AXIS 241Q/S/QA/SA - Pan Tilt Zoom PTZ Controls If the Video Server has been appropriately configured, the Live View page will display the controls available for the installed Pan Tilt Zoom (PTZ) device. The administrator can enable/disable the controls for specified users. Preset positions Video sources Tilt bar (relative) The exact controls shown depends on the make and model of PTZ device. Focus and Iris bars available as well, but the most common controls are; · the Pan bar - moves the camera to the right and left · the Tilt bar - tips the camera up and down · the Zoom bar - zooms the view in and out. Note that this is only available if the camera is fitted with a zoom lens. · the Iris bar - adjusts the brightness of the image Clicking on the bars themselves or on the arrows at the end of the bars will move the camera to a new position. [. . . ] LAN - A local area network (LAN) is a group of computers and associated devices that typically share common resources within a limited geographical area. Linux - A popular operating system that is "open source" and practically free of charge. MPEG-4 - A video compression standard that makes good use of bandwidth, and which can provide DVD-quality video streams at less than 1 Mbit/s. Multicast - A bandwidth-conserving technology that reduces bandwidth usage by simultaneously delivering a single stream of information to multiple network recipients. [. . . ]