1503C MTDR User Manual
C–1
Appendix C: Operator Troubleshooting
For assistance in troubleshooting, use the following flow chart to determine if you
have a simple problem you can fix or if the instrument needs to be sent to a Tektronix
Service Center.
Use this process to determine whether the instrument should be repaired or
is OK to use when you have a problem.
Any time the instrument smells hot, repeatedly blows fuses, or
repeats the same error message, you should have the instrument serviced by
qualified technicians using the procedures in the
.
These are the first checks you should perform when you think you might have
a problem with the instrument.
The first step asks you to preset the instrument controls. Here is how to do
that: Set Vp to .66; turn the IMPEDANCE knob all the way counterclockwise;
turn the FILTER knob all the way counterclockwise, then back two clicks; turn
the DIST/DIV knob all the way counterclockwise, then back three clicks; turn
the PULSE WIDTH knob all the way counterclockwise; remove any
accessories that might be plugged into the Option Port (e.g., chart printer),
and disconnect any cable that might be attached to the frontĆpanel connector.
To complete the tests, you might need a Volt-Ohmmeter (VOM), a flatĆbladed
screw driver (to set the line voltage switch) and possibly, some spare fuses.
When you have completed these tests, you will know that it is safe to use the
instrument or that it needs repair or adjustment internally. You do not remove
the case for these tests.
It is possible for the instrument to continue to make some
measurements even after reporting an error message. Do not ignore repeated
error messages! They indicate something is wrong and should be used with
the
troubleshooting procedures.
This procedure will give you confidence that the instrument is functioning
properly. It is not an exhaustive set of tests that guarantee that the instrument
meets all specifications and is perfectly calibrated. The calibration procedures
in the
are the best method for assuring that the
instrument meets all specifications.
Summary of Contents for 1503C
Page 4: ......
Page 92: ...Appendix A Specifications A 6 1503C MTDR User Manual...
Page 104: ...Appendis B Operator Performance Checks B 12 1503C MTDR User Manual...
Page 122: ...Glossary Glossary 6 1503C MTDR User Manual...
Page 127: ......
Page 128: ......