Agilent Technologies 33120A manual Self-Test Procedures, Power-On Self-Test

Chapter 6 Service

Self-Test Procedures

Self-Test Procedures

Power-On Self-Test

Each time the function generator is powered on, a small set of self-tests are performed. These tests check that the minimum set of logic and measurement hardware are functioning properly. The power-on self-test performs checks 601, 625, and 626.

Complete Self-Test

Hold the shift key while turning on the power to perform a complete self-test. The tests are performed in the order shown below.

Performing Individual Tests

You can perform individual self-tests through the SYStem menu and TEST command. The parameters allowed are ALL, 603, 604, 605, 606, 607, and 608. All numbered tests are looped to give a continuous pass/fail indication when started from the menu (they will repeat the waveform or sync signal until interrupted).

601Front panel does not respond The main CPU U102 attempts to establish serial communications with the front panel processor U1101. During this test, U1101 turns on all display segments. Communication must function in both directions for this test to pass. If this error is detected during power-up self-test, the function generator will beep twice. This error is only readable from the remote interface.

602RAM read/write failed This test writes and reads a 55H and AAH checker board pattern to each address of ram U103. Any incorrect readback will cause a test failure.

603Waveform RAM readback failed This test writes and reads a A55H and 5AAH checker board pattern (12-bit) to each address of waveform ram U404 and U405. The test writes and reads the pattern twice,

at alternating addresses. Any incorrect readback will cause a test failure.

604Modulation RAM readback failed This test writes and reads a 5AH and A5H checker board pattern (8-bit) to each address of Modulation ram U205. The test writes and reads the pattern twice, at alternating addresses. Any incorrect readback will cause a test failure.

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