Hall Research DVS-4A - Manual (Page 11)

4-Port DVI Switch with Audio & Serial Control
9
. RS-232 Control Port Usage
The DVS-4A can also be controlled via a serial device. The unit operates
at a baud rate of 4800 bps. From the serial port, you have full control
over the operation of the switched output, mode, and priority buttons.
Note on the RS-232 port availability on your PC
Most PCs and notebooks do not have a
serial port. So to program the Switch you
may need a USB to RS-232 Serial
converter. These are available from Hall
Research Technologies (Model USB-
RS232-1).
The DVS-4A will output a menu to the serial port on power-up. This
menu can also be displayed when the appropriate command is sent to the
DVS-4A via the serial port. To view the menu, an ASCII serial terminal
or terminal emulator software is needed. An example is Microsoft
Windows
 HyperTerminal (generally found in the Accessories ->
Communication folder)
. To configure HyperTerminal
- Connect direct to any available COM port
- 4800 Baud, 8 bits, No Parity, 1 Stop bit, No flow control
- Settings per following figures: