Functional Check
14 P6249 4 GHz 5X Active Probe Instruction Manual
3. If you have the optional deskew fixture, connect it to the PROBE
COMPENSATION connections. Connect the probe to the deskew
fixture (see Figure 3 on page 15), and proceed to step 6.
4. Using a ground lead and a SMT KlipChip, connect the probe
ground to the PROBE COMPENSATION ground connection on
the oscilloscope.
5. Using a standard tip, hold the probe to the SIGNAL terminal on
the oscilloscope.
6. Adjust the oscilloscope to display a stable calibration waveform.
NOTE. If your instrument supports probe calibration routines, now is
a good time to perform them. However, certain firmware versions of
TDS series oscilloscopes will return a “Probe Cal Failed” message. If
this occurs, refer to Probe Calibration Errors on page 16.
7. Disconnect the probe from the deskew fixture or SIGNAL
terminal and ground the probe tip. (Connect the KlipChip to the
probe tip.)
8. With the probe offset set to 0.0 V, the oscilloscope display should
be at the ground reference.
9. Set the oscilloscope volts/division to 1 V.
10.Adjust the probe offset. The displayed waveform should vary
between approximately +2.0 V and –2.0 V.
NOTE. If no waveform is displayed, check the vertical coupling to be
sure that it is set to DC.
If the offset adjustment has no effect, set the vertical coupling to DC.
If you are using the Tektronix 1103 Probe Power Supply, and the
waveform is distorted, check to make sure that the oscilloscope
termination is 50 W.
If the probe does not pass this functional check, go to Troubleshoot-
ing on page 59.