P6339A Instruction Manual
7
Operating Basics
To obtain the best performance from the P6339A probe, compensate
the probe as needed, observe the maximum input voltage and make
appropriate probe connections.
Probe Compensation
Due to variations in oscilloscope input characteristics, probe
low-frequency compensation may need adjustment after moving the
probe from one oscilloscope to another. If a 1 kHz calibrated square
wave displayed at 1 ms/division shows significant differences
between the leading and trailing edges, perform the following steps
to optimize low-frequency compensation.
1. Connect the probe to the calibration signal on the oscilloscope
front panel.
2. Press AUTOSET or otherwise adjust your digitizing oscilloscope
to display a meaningful waveform.
3. Adjust the trimmer in the probe (accessible through the
compensation box) until you see a perfectly flat-top square wave
on the display. See Figure 2.
Undercompensated
Overcompensated
Properly compensated
Figure 2: Probe compensation waveforms