Putting into Operation
R&S
®
RT-ZD40
19
User Manual 1410.5363.02 ─ 05
for measurements on differential signals with high common mode levels, for
example, current measurements using a shunt resistor.
Figure 2-3: Common mode (CM) offset compensation for a differential measurement
If the input signals fit into the operating voltage window of the R&S
RT-ZD40, it is
not necessary to set a common mode offset compensation.
The R&S
RT-ZD40 measures only differential input signals. Common mode
signals are suppressed by the probe. Therefore, the common mode offset
compensation is not directly visible on the oscilloscope screen, see also
Chapter 4.2, "Dynamic Range and Operating Voltage Window"
on page 29. An incorrect common mode offset compensation can lead to
unwanted clipping effects. Measuring the common mode input voltage
using the R&S ProbeMeter is a convenient way to detect breaches of the
operating voltage window.
Offset Compensation
