HP 16500B - Manual (Page 124)

Correlator Test
The correlator test verifies that the intermodule bus time correlator on the microprocessor
board is functioning properly. If the correlator is functioning, then intermodule
measurements can be time-correlated to within 2 ns. This test reports either a pass or fail
message. For Correlator Test failures, you can suspect a faulty microprocessor board.
Hard Disk Test
The Hard Disk Test reads the hard disk to see if the format is recognized. If the format is not
recognized the test is considered to have failed for the hard disk drive.
Possible problems causing a fail message include the following:
•
A damaged or disconnected disk drive data cable.
•
A damaged or disconnected disk drive power cable.
•
Hard disk drive is not formatted.
•
A faulty disk drive.
•
Faulty microprocessor interface circuitry to the disk drive.
Flexible Disk Test
The Flexible Disk Test reads the flexible disk to identify the format. If the format cannot be
identified, the test is considered to have failed for the disk drive. If a flexible disk cannot be
detected, the message "no disk" is displayed instead of the pass or fail message. This
power-up disk test only checks a few tracks.
Possible problems causing a fail message include the following:
•
A damaged or disconnected disk drive cable.
•
Wrong disk formatting or no disk formatting.
•
A faulty disk drive.
•
Faulty microprocessor interface circuitry to the disk drive.
For Flexible Disk Test failures, verify the continuity and connection of the disk drive cable
and use formatted disks.
Functional Performance Verification Tests
The following paragraphs briefly describe each mainframe test. After a test is run, the status
advisory for each test changes from UNTESTED to PASSED or FAILED. Except for the Color
Display Test and the All System Tests, when a test is selected from the Mainframe Test
screen, a test screen for that specific test is displayed.
If a mainframe test fails, refer to chapter 5, "Troubleshooting."
ROM Test
This test checks the mainframe ROM on the microprocessor board. The test computes a
checksum for the ROM and compares it to a stored value. For ROM Test failures, you can
suspect a faulty microprocessor board.
Theory of Operation
Functional Performance Verification Tests
8–15