Tektronix 2445 User Manual

Appendix A—2445 Operators
POWER-UP TESTS
Power-up tests are divided into two main parts: Kernel
tests and Confidence tests.
KERNEL TESTS
The Kernel tests confirm proper operation of the mem
ory associated with the basic instrument's microprocessor
(RAM and ROM) and of any instrument options that are
present. A failure of a Kernel test is indicated by a flashing
TRIG'D indicator on the instrument front panel.
Even with a Kernel failure, the instrument may still be
put into the operating mode by pressing in the A/B TRIG
button. However, its operation will be unpredictable.
CONFIDENCE TESTS
The Confidence tests are performed after successful
completion of all Kernel tests. Confidence testing for any
options present in the instrument will automatically be
included. A failure of any Confidence test at power on is
indicated in the bottom line of the crt readout. The failure
display has the following format:
TEST XX FAIL YY
where XX is the two-digit hexadecimal test number and YY
represents the failure code for the failed test.
Brief descriptions of the tests are listed in Table A-1. A
Confidence test failure may not render the instrument
inoperable. The instrument may still be placed into the
operating mode by pressing in the A/B TRIG button;
however, it may not meet all specifications.
Table A-1
Confidence Test Numbers and Descriptions
Test Number Description
01
IRQ—Checks that interrupts are occurring
and that correct time interval exists
between interrupt occurrences.
02
SWITCH STUCK—Checks for momentary
switches that may be stuck closed.
03
READOUT BOARD—Checks interfaces
with the Readout circuit board and the
readout RAM.
04
EAROM—Checks the EAROM interface
and verifies the calibration constants stored
in the EAROM.
05
MAIN BOARD—Partially checks the Main
circuit board by operating the Auto Level
function on the Line Trigger source.
A-1

Tektronix 2445 Specifications

General

Brand	Tektronix
Model	2445
Category	Test Equipment
Language	English