Diagnostic Testing Under Windows 3.x
103
Running the Group 1 Tests
Group 1 tests evaluate the physical components of the NIC.
A Group 1 test failure can indicate a faulty NIC.
For a description of each Group 1 test, press F1 to access
Help. In the Help screen, tab to the
Index
button and press
Enter. Use the arrow keys to move through the Index
listings. Select
Test Definitions
and press Enter.
Follow these steps to run the Group 1 tests:
1 From the
Test
menu, select
Run Tests
and press Enter.
The Run Tests dialog box appears with the
Start
button
already selected.
2 Press Enter to start the tests.
Group 1 tests run 10 times (default setting) unless you
specify otherwise. The test results are displayed in the
Results column.
Running the Group 2 Test
The Group 2 test is the Network Loopback Test. It tests
whether the 3C509B-COMBO and 3C509B-TPC NICs can
transmit and receive data over thin Ethernet coaxial wire.
This test requires either installing a loopback plug at the
transceiver connection on the NIC or running the test on an
idle network.
A failure in this test usually indicates a cabling problem.
CAUTION:
Running the Group 2 test while connected to
an active network can cause intermittent failures.
Assembling a Loopback Plug
If you do not have a loopback plug, you can order one from
your authorized network supplier or you can make your
own. You can purchase the terminators from your network
supplier (3Com part number 3C535).
To assemble the loopback plug, connect two 50-ohm
network cable terminators to a T connector, as shown
in
Figure 60
.
Book Page 103 Monday, June 7, 1999 8:55 AM
