JVC DPT 115 manual Operation, 1 RS-422, 2 RS-232, System Test, Power on Test

3.OPERATION

This section describes the operation of the DPT 115 and related system components. The DPT 115 receives serial data commands from one of two sources in all applications, a hardware controller or a computer system. The pan and tilt unit will accept RS-232, RS-422 or both. Functions of the pan and tilt include manual camera positioning, manual zoom and focus control, and presets. Presets are stored pan, tilt, zoom, and focus positions that the DPT 115 will return to automatically when recalled. The preset data is stored within the pan and tilt head. This data is stored and recalled from the controller or computer system.

3.1CONTROLLER

A controller is a device designed exclusively to provide ASCII serial commands to the pan and tilt. These units generally have a joystick for up, down, left, and right direction commands. There will also be some form of seesaw or switch controls for zoom and focus. Switches will also be provided for preset control. The controller will transmit commands in RS-232 or RS-422 formats.

3.1.1 RS-422

RS-422 format is a balanced four wire interface. The signals are transmit plus, transmit minus, receive plus, and receive minus. This interface is typically 26 AWG wire with a distance limitation of 2000 feet.

3.1.2 RS-232

RS-232 format is a three wire single ended interface. The signals are transmit receive, and ground. This interface is typically 20-24 AWG wire with a distance limitation of 100-200 feet.

3.2COMPUTER

A computer can also be used to provide ASCII serial commands to the pan and tilt. Software may be written to output the serial command over the serial port to remotely control the pan and tilt. A computer program is available from the manufacturer that will allow a user to operate the pan and tilt via the serial port of their personal computer. To obtain a copy of this program call the manufacturer at the technical support center.

3.3SYSTEM TEST

3.3.1 Power “ON” Test

Apply power to the pan and tilt electronics by activating the slide switch on the base of the pan and tilt. The power green power LED should illuminate indicating the unit has DC power. The red LED will flash once during power up.

2/12/05 7 Document D0153