Rohde & Schwarz RT-ZD40, Руководство пользователя

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Putting into Operation
R&S
®
RT-ZD40
18 User Manual 1410.5363.02 ─ 05
The differential offset function can compensate a DC voltage applied between the
positive and the negative input socket. This is particularly helpful if a small single-
ended signal with a large DC offset is measured with a differential probe, for
example, with the negative input socket connected to ground. As the R&S
RT-
ZD40 measures differential voltages, setting a differential offset compensation is
directly visible on the oscilloscope screen as a voltage offset of the measured
waveform.
Figure 2-2: Differential offset compensation for a single-ended measurement (negative
input connected to ground) using an R&S RT
‑
ZD10/20/30
There are several ways to set the offset compensation:
●
Use the vertical knob at the oscilloscope if its function is set to offset.
●
Enter the offset value in the channel settings or probe settings on the
Rohde
& Schwarz oscilloscope.
●
Use the micro button to measure input signals with different DC offsets: assign
"Offset to mean" to the micro button. See also
Chapter 2.3.2, "Micro Button" ,
on page 17.
For more details, see the oscilloscope's user manual.
2.4.2 Common Mode Offset
Common mode offset compensation is available for R&S RT
‑
ZD probes with
serial number
≥
200 000. It can compensate a common DC voltage applied to
both input sockets (referenced to the ground socket). This is particularly helpful
Offset Compensation