Vidikron v120 manual 6Serial Communications, Serial Command Syntax

6Serial Communications

To interface the VHD Controller with a home theater automation/control system or a PC running terminal emulation software, connect it to your control system or PC as shown in Figure 3-16.Use a null-modem cable.

If you are using a PC to communicate with the VHD Controller:

1.Start a terminal session on your PC using a terminal-emulation program, such as HyperTerminal.

2.Configure the PC serial port as follows: no parity, 8 data bits, 1 stop bit and no flow control. Set the baud rate to 19200, to match that of the VHD Controller RS-232 port.

3.Press <Enter>. You should see a command prompt (>) in the terminal window.

4.Type a command from among those listed in Table 6-1and press <Enter>.

6.1

RS-232 Connection and Port Configuration

•Commands are in ASCII format and are not case-sensitive; on and ON are equivalent.

•For a command that takes no parameters, type the command followed by a carriage return; for example, to turn on the system, type ON<Enter>.

•For a command that takes a parameter, type the command, one or more spaces and the desired value followed by a carriage return; for example, to switch to the S-Video input, type SSRC 1<Enter>.

•When you enter a valid command, the VHD Controller executes it. When you send an on/off, input selection, aspect ratio or image preset command, the VHD Controller also responds with an acknowledgment on the command line. For example, when you issue the command SAR 2, the VHD Controller responds with Letterbox on the command line.

•When you enter a misspelled or otherwise invalid command, the VHD Controller ignores it

and responds with Invalid Command on the command line.

•When you send a command followed by values outside the valid range for that command, the VHD Controller ignores it and responds with Invalid Parameter on the command line.

•When the VHD Controller receives an OFF command, it will not acknowledge or execute any commands for approximately 90 seconds afterwards. This is to prevent hot re-strikes of the lamp, which can damage it.

6.2

Serial Command Syntax

Vidikron Vision Model 120 Owner’s Operating Manual 67