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R&S
RT‑Z1M
3.5.3 Analog bandwidth
The R&S RT‑Z1M features two lowpass filters of 200 MHz and 20 MHz. The filters
reduce bandwidth and thus noise during the measurement.
The bandwidth filter is part of the vertical settings of the channel to which the buffer
amplifier is connected. For details, refer to the user manual of the oscilloscope.
3.5.4 Self-alignment
The R&S RT‑Z1M has a self-alignment function. Self-alignment compensates mea-
surement errors caused by a termination impedance slightly different from 50 Ω, or an
ambient temperature different from the one at which the factory alignment was done.
When the buffer amplifier is detached from the oscilloscope, the values of the self-
alignment are discarded, and the original factory-alignment is reloaded. Thus, repeat
the self-alignment when you reattach the probe.
The self-alignment of the buffer amplifier is part of the probe settings of the channel to
which the buffer amplifier is connected. For details, refer to the user manual of the
oscilloscope.
3.5.5 R&S ProbeMeter
The R&S ProbeMeter is an integrated voltmeter that measures DC voltages with higher
precision compared to the oscilloscope's DC accuracy. The DC voltage is measured
continuously and runs parallel to the time domain measurement of the oscilloscope.
When the R&S ProbeMeter is active, the measured values are displayed on the oscillo-
scope. The R&S ProbeMeter state is part of the probe settings of the channel to which
the buffer amplifier is connected. For details, see the user manual of the oscilloscope.
Advantages of the R&S ProbeMeter:
●
Measures DC voltages of different levels, no need to adjust the measurement
range of the oscilloscope.
●
True DC measurement (integration time > 100 ms), not mathematical average of
displayed waveform.
●
High measurement accuracy and low temperature sensitivity.
●
Simple means of setting the oscilloscope's trigger level and vertical scaling if a
waveform is not visible.
●
Independent of oscilloscope settings for position, vertical scale, horizontal scale,
and trigger.
With buffer amplifier, you can use the R&S ProbeMeter also with passive probes,
which do not have an own R&S ProbeMeter. In this combination, the R&S ProbeMeter
of the buffer amplifier takes effect. Note that the R&S ProbeMeter does not show the
correct DC voltage on the probe tip if AC coupling is active. Active probes that have a
R&S ProbeMeter use their own one as usual, the R&S ProbeMeter of the buffer ampli-
fier is not used.
Manual 1801.3142.02 ─ 05
Putting into operation
Using the buffer amplifier
14
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