Putting into Operation
R&S
®
RT
‑
ZM
19
User Manual 1419.3128.02 ─ 04
MultiMode
setting
Offset compensation Offset com-
pensation
range
Application
DM-Mode
Differential DC voltage ±16 V
Probing single-ended signals with the
R&S
RT-ZMA30 browser module, e.g.
power rails with high DC component
and small AC signal.
CM-Mode
Common mode DC
voltage
±16 V
Measurements of signals with high
common mode levels, e.g. current mea-
surements with a shunt resistor.
P-Mode
DC voltage at positive
input terminal
±24 V
Measurement of single-ended AC sig-
nals with high superimposed DC com-
ponent at the positive input terminal.
Note
: The maximum voltage difference
between the positive and negative input
terminals is 16
V.
N-Mode
DC voltage at nega-
tive input terminal
±24 V
Measurement of single ended AC sig-
nals with high superimposed DC com-
ponent at the negative input terminal.
Note
: The maximum voltage difference
between the positive and negative input
terminals is 16
V.
You can set the offset compensation at the oscilloscope in various ways:
●
Use the vertical [Position] knob. Before adjusting the offset, make sure that
the function of the knob is set to "Offset".
●
Use the probe settings menu of the channel to which the probe is connected.
●
Use the micro button to compensate the DC component of the measurement
signal, which is very helpful during measurements of input signals with differ-
ent DC offsets. Therefore, assign "Set offset to mean" to the micro button
function.
Setting an offset compensation voltage and then switching the probe measure-
ment mode does not affect the offset settings.
For example, you can measure a differential signal superimposed with a high DC
common mode component. First switch to CM-mode and compensate the com-
mon mode offset using the vertical [Position] knob until the measurement trace is
in the center of the oscilloscope screen. Then switch back to DM-mode to mea-
sure the differential signal.
For more details on setting the offset compensation voltage, refer to the user
manual of your Rohde
&
Schwarz oscilloscope.
Offset Compensation
