Electronics
model RS-2/S
Installation Instructions
Hardware
The RS-2/S adapter simply plugs into the
RS232 port of most any PC, whether it be a laptop or desktop
unit. The enclosed cable connects between the RS-2/S and the
controlled audio/video device, typically a video cassette
recorder (VCR). When installing the RS-2/S, be careful to note
which jack to use on your VCR. It should be marked on the VCR
chassis as "Control S In".
Keep in mind that there are two VCR addressing schemes at
work. One is the port, or cable, selection that sends Control-S
commands out the three cables attached to the RS-2/S3. The
RS-2/S1 adapter has only one Control-S output cable, which is
addressed as Port 1. The other addressing mode is the 5-bit
addressing on each Control-S cable.
Many VCRs have a "VCR1, VCR2, VCR3" switch that
enables a deck to respond to 3 of the possible 32 Control-S
addresses. By connecting three VCRs on each of the three RS-2/S3
cables, nine VCRs can be easily controlled.
The RS-2/S adapters have an LED that is illuminated for about
1 second when power is first applied by the applications opening
the serial port. The LED will also illuminate as any serial
character is sent or received. The LED also stays illuminated
whenever a 0FFh character is received. All of these LED
indications can be used to verify that the adapter is working
properly.
Software
Please refer to the enclosed RS-2/S protocol
specifications for interface details. The systems integrator or
software engineer will need write the necessary code to
communicate with the RS-2/S and, therefore, the controlled VCR.
For a quick checkout, it's possible to use Windows
HyperTerminal to generate a few Control-S codes. For this test
only, set HyperTerminals to 9600 Baud, 7 bits, Odd parity, and
for the correct COM port. Then, at the key board send a 02h by
holding ALT, pressing the keypad "2", and releasing
ALT. (This sends the first protocol character, selecting VTR1 and
All ports.) Second, send a Stop code (24 decimal) by holding ALT,
pressing 2, pressing 4, and releasing ALT. (The deck will need to
be actively moving tape, such as Playing, in order to view the
effects of this command.) Other deck commands that will work this
way include Rewind (27 decimal), Record (29 decimal), and Slow
Play (34 decimal).
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