AppendixC
Power
Up
Tests
Power-up tests are automatically performed each time the instrument is turned on.
These tests provide the user with the highest
possible confidence that the instrument
is
operational. They include a Kernel test and Confidence tests.
Kernel Test
A kernel test failure is considered "fatal" to the operation of the instrument. A
Kernel test failure causes the TRIG'O indicator to flash and displays a binary code
pattern
on
other front panel indicators. If a kernel test fails, the user can attempt to
operate the instrument
normally by pressing the
NB
TRIG button. Operation
is
unpredictable; it depends on the nature of the failure.
Confidence Tests
Confidence tests are performed after the processor kernel has been found
operational. These tests check a portion
of
the instrument for correct operation.
If a Confidence test fails, the readout will indicate the nature
of
the failure by a
coded message
in
this format:
TEST XX FAIL VV
where
XX
is
a two-digit test number and
VY
is
a failure code. Table
C-1
shows the
function affected by detected failures.
2465A/2455A/2445A Operators
C-1
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