Agilent Technologies 8935 Series Specifikace stáhnout pdf (Strana 51)

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50 Chapter 3

Troubleshooting

Self-Test Diagnostics (Step 1)

On power-up the Test Set runs a self-test diagnostic test. Most of the

Test Set’s digital functions are tested. The outcome of the test appears

on the display (if operating) and on four LEDs viewable through an

access hole on the top internal cover.

The self-test diagnostic can be run three ways:

1. The test runs automatically when the Test Set is turned on. After

the Test Set powers up, a message appears at the top of the display.

If one or more tests fail, the message reports the failure with a

hexadecimal code.

During the test, coded failure information is displayed on four LEDs

on the top of the Controller (A2A31) assembly, see Figure 3-5 on page

53. The Test Set’s cover must be removed to view these LEDs. See

chapter 3 for disassembly and replacement instructions.

2. The test runs when the Test Set receives the query *TST? over GPIB.

The resultant decimal code can be read over the bus.

3. The test runs when the Self Test menu item of the Functional

Diagnostics menu is selected.

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Agilent Technologies 8935 Series Specifikace Strana 51

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