IP Address and Raw TCP/IP Connection
This document describes one of the most popular methods of setting up
Ethernet communication for the Quantum Composers pulse generators. The
method discussed is Raw TCP/IP communication.
The Ethernet module used in Quantum Composers pulse generators is a Digi
Connect ME device manufactured by Digi International, Inc. It supports virtually
all practical Ethernet communication methods. A set of utilities and documenta-
tion by Digi is included on the CD shipped with the pulse generator.
This discussion assumes that the Digi utilities included with your pulse generator
and National Instruments VISA (version 3.3 in this procedure, see National
Instruments website) are installed. The procedures discussed have been
prepared using Windows XP service pack 2.
Determining IP Address
The Digi module has been reset to factory defaults before it left the manufactur-
ing facility. In this mode, it is ready to be assigned an IP address by the local
DHCP server. If a crossover cable is being used, the Ethernet device will as-
sume a default IP address.
The Digi utility Digi Device Discovery can be used to determine the IP address
that is currently assigned to the Ethernet module. Hit Start, All Programs, Digi
Connect, Digi Device Discovery . When the utility opens, it scans the LAN
looking for Digi Ethernet modules. It may take a minute after plugging in or
powering the Ethernet module before the LAN negotiates the connection with the
Digi module. Hit Refresh View in the left column after a minute or so if the utility
fails to see the unit when you start it. In some situations it is possible that the
Windows Firewall will block the Digi Device Discovery from being able to see
the unit. It is advisable to turn the Windows Firewall off while performing these
tasks. When the utility sees the Digi device, it will display it in the list (Figure 1).
