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Troubleshooting
P6249 4 GHz 5X Active Probe Instruction Manual
61
Table 8: Troubleshooting guide (Cont.)
Symptom ActionResultChecks
Distorted or
nonlinear signal
Is the signal within
linear dynamic
range? See page 19.
No Set channel vertical
offset to match signal
characteristic.
No Offset Adjust
(Signal present)
Go to Probe Power
row
Probe power OK Continue checks
Check variation of
offset input from host
instrument. See
Figure 22. Signal
should vary between
+1 V and –1V.
Offset input OK
Offset input bad
Replace probe.
Check TEKPROBE
interface pins on the
compensation box.
See page 53.
Check TEKPROBE
interface on host
instrument. (Try an
adjacent channel.)
Repair host
instrument
Probe Power Check the power
test points in the
compensation box.
See Figure 22.
Power OK Continue checks.
Power bad Check TEKPROBE
interface pins on the
compensation box.
See page 53.
Check TEKPROBE
interface on host
instrument. (Try an
adjacent channel.)
Repair host
instrument