Maintenance
Table 7: Probe troubleshooting (cont.)
Symptom
Possible cause
Degauss/AutoZero
Flashing red: The probe requires degaussing. Degauss the probe.
Flashing amber: The probe is performing the degauss routine.
Continuous green: The probe is degaussed and ready for use.
50
Ω
Term
Off: The probe is connected to an instrument that is terminated with a 50 ohm input.
Continuous green: The probe is connected to an instrument that is terminated
with a 1 M ohm input.
The probe is automatically set to the correct termination when the degauss routine
is run.
LEDs on the probe do not light.
The oscilloscope channel may be bad: Try another channel or another oscilloscope.
All LEDs should light brie
fl
y and then the Degauss/AutoZero LED should
fl
ash.
If the probe functions correctly on another channel or oscilloscope, the contacts on
the input channel that exhibits the problem may need to be cleaned. Refer to your
oscilloscope manual for the proper cleaning procedure.
If the probe does not work on another channel or oscilloscope, the probe is
defective, and must be returned to Tektronix for repair.
An error message displays on the
oscilloscope.
The message will describe the cause and solution. For example, if the
Probe
degauss needed
message appears, perform the degauss procedure.
20 A Current Probes Instruction Manual
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