Functional Check
P6249 4 GHz 5X Active Probe Instruction Manual 17
Other TDS 500, 600, or 700 series oscilloscopes may give the error
message “Probe Cal Failed” when you run the probe calibration
function, but the probe will still meet its warranted specifications.
Check for Hardware Problems
If the firmware version on your TDS 500, 600, or 700 series
oscilloscope is fully compatible with the P6249 probe, do the
following:
1. Perform the Signal Path Calibration on the oscilloscope and wait
for it to complete.
2. Rerun the calibration routine on the P6249 probe.
3. If the oscilloscope returns the failure message again, initialize the
probe calibration and check probe offset zero:
HIf offset zero is greater than ±25 mV, perform the Offset Zero
adjustment on page 50 in the Adjustments section.
HIf offset zero is less than ±25 mV, check the Offset Range as
instructed on page 51 in the Adjustments section.
4. Rerun the probe calibration function on the P6249 probe. If the
probe calibration fails, run the calibration on another oscilloscope
channel.
5. If the problem persists, there is a hardware fault. Please contact
your nearest Tektronix Service Center for more information.