Fluke 2680A User Manual page 261

Appendices
H
Network Considerations
interchangeable between software vendors. If the wrong winsock.dll is found
during startup, it will be loaded and the network interface will not operate.
The 2680 Series instruments have a unshielded twisted pair (10/100BaseT)
connector for network connection. It automatically selects 100 Mbs or 10 Mbs to
match the speed of the network port to which it is connected.
If you are already using the TCP/IP protocol for client/server activities on your
network, you may want to review the socket port assignment for the 2680 Series
instruments and PC software. If you already have a service assigned to the socket
port that is used as the default in the 2680 Series products, you may have to change
the port used by 2680 Series. The list of supported services is usually in the
"SERVICES" file in the directory that contains the TCP/IP stack software.
Again, if you are already using TCP/IP, you must assign IP addresses to the
instruments (and PCs of course) in accordance with your established subnet
scheme. If you install the Fluke DAQ software for "general network" operation,
you are free to select any IP address for the PC and instruments. With the isolated
network operation, you are limited to using the 198.178.246.0 subnet (Class C
subnet assigned to the Fluke Corporation) for both the PC and instruments.
If your network contains routers, bridges, gateways, or other devices that divide
the network into subnets, and you intend to have the PC on a different subnet from
the 2680 Series instrument(s), you need to make sure that the instruments can
route IP packets. This is especially true on Novell networks, where the network
may contain devices that can route only IPX packets.
The PC software uses the Address Resolution Protocol (ARP) to establish the
relationship between the physical address and IP address of the 2680 Series
instruments. The ARP protocol uses broadcast messages. So, your routers must be
set up to pass ARP broadcasts to all subnets containing 2680 Series instruments.
Running Two Network Cards in a PC
There are cases when you may want to operate more than one network interface on
your PC. You can do this if you're careful in setting up the adapters and
configuring the software.
One instance when you might want to use two adapters in your PC is when you
want to communicate with the 2680 Series instruments on a network that is
separate from your general, multipurpose network. Another is when your general
network uses other than Ethernet hardware (such as Token Ring).
Use of two network adapters will allow higher throughput when communicating at
high speed with a set of 2680 Series instruments on one network and logging data
to a file server over the other network.
When setting up two network adapters in a single PC, make sure that the hardware
resource setups do not overlap. For example, each ISA interface adapter needs a
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