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This chapter explains how to run Autotest, including selecting the cable types and Autotest
specifications. It also explains how to customize an Autotest so you can select the pairs that are
tested, the PASS/FAIL criteria, and select which tests to run during Autotest. Each test, such as
NEXT, Impedance, Capacitance, etc. is explained, including how to customize the limits for each
test and how to troubleshoot test results.
Steps for Running Autotest
1. From the Ready screen, verify that the cable type matches the cable type you will be testing. If
it matches, proceed to step 2. Otherwise, see Selecting the Cable Type for instructions.
2. Also from the Ready screen, verify that the default Autotest is the Autotest that you want to
run. If it is, proceed to step 3. Otherwise, see
Customizing Autotest
for instructions.
3. Connect the Scanner to the near end of the twisted pair cable you are testing and connect the
Injector to the far end. During Autotest, the Injector provides the far end termination for
measurements made by the Scanner. In addition, it generates signals of programmable
frequency for measurement by the Scanner to determine one-way Attenuation. The
2-Way
Injector+/2-Way Injector
also generates swept frequency signals and measures the Near End
Crosstalk at its end of the installed link. The Scanner acts as the termination device while
NEXT is being measured by the
2-Way Injector+/2-Way Injector
.
4. If you have not used the Injector in the last 24 hours, you will need to calibrate. Press the
Extended Functions key and select Calibrate Injector.
5. Press the AUTOTEST key. If you are testing twisted pair cable, the Scanner will immediately
verify that the Injector is attached. If the Injector is not attached, the Scanner will wait until it
is attached before running the Autotest.
6. When the Autotest completes, a PASS or FAIL tone will sound. You can then view the results
of individual tests. (See Autotest Results Screen for instructions.) Or, you can view a
summary of test results. (See Viewing Autotest Results Summary for instructions.)
7. You can also save Autotest results — see Saving Autotest Results for details.
8. You can also print Autotest results — see Printing Autotest Results for details. A sample
Autotest report is shown at the end of this chapter.
Press the ESCAPE key at any time to cancel the Autotest.
Selecting the Cable Type
To display the CABLE SETUP screen, press Cable (F1) from the Ready screen. This screen
displays the cable types available for testing.
Before running an Autotest, verify that the cable type you are testing matches the cable type in the
Scanner. Press the
Ñ or Ò arrow key to scroll through the list one line at a time. Press the
Ï or Ð arrow key to scroll through the list one page at a time.
If the cable type you are using is not in the list, press Edit (F2) to define a new cable type (see
Editing the Cable Type for further instructions). You can also press Edit (F2) to review the
current settings for the selected cable type or to make changes.
Press Default (F1) to choose the highlighted cable type for the test you run. Choosing the correct
cable type will ensure accurate Length measurements.
Press Delete (F3) to delete user-defined cable types. Note: Factory-supplied cable types cannot be
deleted.