User`s manual

3-13
IM 701610-01E
Before Making Measurements
3
Explanation
Necessity of Phase Correction of the Probe
When using the oscilloscope with a probe, the probe phase must be corrected by
adjusting the variable capacitor inside the probe so that the gain is constant relative to
the frequency. Measurements will not be accurate unless this adjustment is made,
therefore you should make sure to perform this phase correction when using the probe
for the first time.
The input capacitance differs depending on the oscilloscope. It can also vary slightly
from channel to channel, even on the same oscilloscope. Even if the phase has been
previously corrected, you must perform the correction again if you move the probe to a
new oscilloscope or a different channel.
Calibration Signal
A probe compensation signal (square waveform) of the following characteristics is output
from the CAL terminal on the front panel.
Frequency: approx. 1 kHz
Amplitude: approx. 1 V
Waveform Differences
Correct Waveform Over-Compensated
(Gain is too High at High
Frequency)
Under-Compensated
(Gain is too Low at High
Frequency)
3.5 Compensating the Probe (Phase Correction)