P6249 4 GHz 5X Active Probe Instruction Manual 59
Troubleshooting
This troubleshooting documentation details isolation to either the
probe or the oscilloscope.
NOTE. Certain firmware versions of TDS series oscilloscopes will
return a “Probe Cal Failed” message when you run probe calibration
routines on the P6249 probe. If this occurs, refer to Probe Calibration
Errors on page 16.
To troubleshoot the P6249, the probe must be attached to an
operating TEKPROBE interface oscilloscope with the top cover of
the compensation box removed. Refer to page 54 for instructions on
opening the compensation box.
The oscilloscope should be set to the following settings:
H50 W termination at instrument.
HDC coupling
CAUTION. Observe caution when probing in the compensation
box. Operating voltages will be present. Be careful not to touch
or ground energized components.
Work at a Level 1 ESD workstation when performing trouble-
shooting. The compensation box contains static sensitive
devices.