General Information
Instrument Cooling
To prevent instrument damage from internally generated heat, adequate air flow
must be maintained. Before turning on the power, verify that the spaces around the
air-intake holes on the bottom of the cabinet and the fan-exhaust holes in the rear
panel are free of any obstruction to airflow.
Start-up
The oscilloscope automatically performs a set of diagnostic tests each time the
instrument is turned on. These tests warn the user of any available indication that
the instrument may not be fully functional. The tests run for several seconds after
power is applied. If no faults are encountered, the instrument operates normally. A
failure of any of the power-up tests will be indicated by either a flashing TRIG'D
indicator on the instrument front panel or a bottom-line readout on the CRT in the
form:
TEST XX FAIL YY (where XX is the test number and YY is the failure code
of the failed test).
If a failure of any power-up test occurs, the instrument may still be usable for
some applications. To operate the instrument after a power-up test failure, press
the A/B TRIG button. Even if the instrument then functions for your particular
measurement requirement, it should be repaired by a qualified service technician at
the earliest convenience. Additional information on the power-up tests may be
found in Appendix C at the rear of this manual. Consult your service department,
your local Tektronix Service Center, or nearest Tektronix representative if
additional assistance is needed.
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2465B/2455B/2445B Operators
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