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
1-4
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'O
indicator on the instrument front panel
or
a bottom-line readout on the CRT in the
form:
TEST XX FAIL
VV
(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 A at the rear
of
this manual. Consult your service department,
your
local Tektronix Service Center,
or
nearest Tektronix representative if
additional assistance is needed.
2465A/2455A/2445A Operators
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