J-Self-Tests - Keithley 486 Instruction Manual

SECITON 4
IEEE-488 Reference
4.2.8
J - Self-Tests
Purpose To perform self-tests on its memory elements and/or display.
Format Jn
Parameters JO Perform ROM/RAM self-test
Jl Perform display and ROM/RAM self-tests
Description Both JO and Jl will perform tests on its memory elements (ROM and RAM). In the event of a
failure, one or both of the following messages will be displayed:
ROM ERROR
RAM ERROR
The Jl co mmand will also cause the display test to be run. For this test, each segment of all the
LEDs will be sequentially displayed. Then, all segments of each LED will sequentially dis-
played. The display test ties approximately 17 seconds to complete.
The UO and Ul status words can be examined to check for self-test errors.
Programming
Example
OLn-MJT 72.2; '71X" ! Perform display and memory tests.