User`s manual

.Note: Click the Search button before selecting a server from the pull down list if
you add more NPort Expresses after the Diagnostics utility is initi-
ated. Otherwise the new server will not be listed in the pull down list.
11. The check box for ports needing to be tested should be checked
(refer to the figure in step 6). For those ports that no longer need to
be tested, click inside the checked box to remove the check mark.
12. If you do not need to change any Test Items or Communication
Parameters, click OK to return to the NPort Server Diagnostics
window. Otherwise continue the configuration process in the next
subsections.
Test Item Selection
Click the Test Item tab in the Diagnostic Config window.
The tests that you want to run should be checked. Add or remove
check marks as necessary by clicking inside the appropriate check
box.
¨ Internal Test: If this test item is selected an internal test will be
done on the RS-232 serial port, and the result (successful or
failed) will be displayed when the test is completed.
¨ External Test: If this test item is selected, an external test will
be done to check that the connection signals for each port are
working properly. For the external test, you will need to connect
each port to a loopback tester. Refer to Appendix C for the
specifications. If you are using Model DE-331, the external
loopback test only applies to the RS-422 mode. The items
DTRàà DSR and DTRàà DCD are not supported.
The items described below which are check marked will be
tested.
¨ Tx νν Rx: Displays the test result of tranmitting and
receiving data between two ports.
¨ RTS γγ CTS: Displays the test result of the RTS and CTS
signals between two ports.
¨ DTR γγ DSR: Displays the test result of the DTR and DSR