RS-4/D
Installation Instructions

Hardware
The RS-4/D adapter simply plugs into the RS232 port of the Sony model DSR-20 videotape recorder using a 3-foot, 9-25pin serial cable. A standard, straight, 9-pin cable connects between the RS-4/D and the controlling video editor, usually equipped with an RS422 serial port. If the editor is a PC, then an RS232-to-422 adapter is also required at the PC COM port. The RS-4/D adapter derives its power from the RS232 port of the videotape machine.

Make sure that the DSR-20 tape deck has its serial transmission rate set to 19200 baud for adapters marked with "ver 5.6"; otherwise, 9600 baud should be used for adapters marked with "ver 5.6a". This is set from within the on-screen menu of the DSR-20 tape deck. Should it be necessary to change the DSR-20's baud rate, it is recommend that the baud rate be double checked to insure that the change was actually accepted by the tape deck (use the "SET" button to lock in the new rate). The Remote/Local switch on the DSR-20's front panel also needs to be in the Remote position in order for the serial interface to control the deck. Contrary to most decks, timecode cannot be read if the deck is in Local mode.

The controller baud rate does not need to be changed. It will see the RS-4/D adapter as just another RS422, "Sony Serial"-compatible deck operating at 38400 baud.

Software
There is no special software driver required for the RS-4/D, as it directly translates the de facto industry-standard "Sony Serial" protocol found on RS422.