Service manual

148 7

Service Related Menus

DIAGNOSTIC TEST Menu

The diagnosis key menus consist of several menus that are accessed through the diagnosis

menu. The diagnosis menu is displayed by pressing

[System], DIAGNOSTIC TEST.

When the GPIBGPIB commands are applicable, follow the keystrokes in parentheses. The

<numeric> listed below specifies the test number and is an integer from 0 to 31.

RUN TEST (:DIAG:TEST:EXEC)

Runs the selected test. When the executed test requires user interaction, CONTINUE

(:DIAG:TEST:CONT) and the instruction appear on the display. Follow the displayed

instruction and press

CONTINUE to continue the test.

INTERNAL TEST (:DIAG:TEST <numeric>)

These tests are completely internal and self-evaluating. They do not require external

connection or user interaction. The 4294A has 16 internal tests.

EXTERNAL TEST (:DIAG:TEST <numeric>)

These are additional self-evaluating tests. However, these tests require some user

interaction. The 4294A has 10 external tests.

DISPLAY TEST (:DIAG:TEST <numeric>)

These tests are used to check for proper operation of the display circuits. The 4294A has 5

display tests.

NOTE After executing a test by pressing RUN TEST, an annotation (Svc) is displayed to indicate

which tests are executing and that the analyzer settings are changed to test settings. To

return the analyzer to normal operation, cycle the analyzer power (off and on), or press

[Preset].

NOTE While any test is being executed, do not change any analyzer setting using the front-panel

keys, the GPIB, or I-BASIC program. If the setting is changed during test execution, the

test result and the analyzer operation will be unreliable.

Test Status

When selecting a test, the test status abbreviation is displayed as shown in Figure 7-1.