Owners manual

7
RS-232 CONTROL
Controlling the D2H-4P Duo via RS-232 requires an RS-232 card
installed on your computer or a USB to RS-232 adapter. Check
the D2H-4P Duo and your Computer to determine if you need a
male to male or a male to female cable and how long it needs to
be. The D2H-4P Duo requires a straight through cable. You can
use a Null Modem Adapter to convert a crossed cable to a
straight through cable. An example of a straight through cable
pin-out is shown in Figure 7-1. The standard maximum length for
an RS-232 cable is 50 feet. Call our Smart-AVI Support Engineer
if you require more information.
Figure 7-1
You will need to identify the COM port number used. On a Windows PC:
1. Click on the start button.
2. Click on Control Panel.
3. Click on Device Manager.
4. Click on the arrow next to Ports (COM &
LPT).
You should see the COM port number in use.
See Figure 7-2
Figure 7-2
RuntheterminalclientofyourchoicesuchasHyperTerminalorPuTTY.SelectthecorrectCOMportonthe
computer.Usethefollowingconnectionsettings:9600,N,8,1,noflowcontrol.
Cyclingpoweronyourunitwilldisplayabootupmessageinyourterminalsoftwareiftheconnectioniscor‐
rect.

NOTE: Your terminal software may not default to or display all of the settings above. If you attempt to con-
nect and the settings above are not set correctly, after you set them correctly you may need to cycle
power on your unit for communication to be established.

SeeTable6‐2foralistofRS‐232commands.