Rohde & Schwarz R&S UPP, User Manual

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Instrument Functions
R&S
®
UPP
379 User Manual 1411.1055.32 ─ 10
Remote command:
SENSe[1]:FILTer<n2>
on page 773
For a description of the filters and their setting parameters, see Chapter 5.39.4, "Filter
Table" , on page 468.
Meas Time
This is used for choosing the measurement time for the purpose of adapting the mea-
surement speed to the waveform or, in the case of single tone signals, to the signal fre-
quency.
The priority can be set to a short measurement time or high accuracy depending on
specific measurement requirements.
In automatic measurement modes the measurement time is adapted to the measured
signal frequency, provided an AC signal that is sufficiently strong and not too low in fre-
quency is present (f
≥ 10 Hz).
Note: With severely noise-corrupted or distorted signals and multi-tone signals, the
automatic measurement modes (especially "Auto Fast") may no longer be able to
clearly detect the signal period. For the avoidance of measurement errors, such signals
should therefore preferably be measured using "Gen Track" or "Value".
"Auto Fast" For use with the RMS measurement mode only.
Level measurements are performed as far as possible over whole AC
periods. In the case of high frequencies, the measurement time is
extended so that a maximum algorithmic error of
1 % is not excee-
ded.
In the case of low-noise DUTs the upward measurement time for
noise measurement is limited to 100
ms (corresponding to 1 period
at 10 Hz).
This setting is recommended when the excitation (in signal measure-
ments) is a single tone signal, if the aim is to achieve the highest
measurement accuracy.
"Auto" For use with the RMS measurement mode only.
Level measurements are performed as far as possible over whole AC
periods. In the case of medium or high frequencies, the measurement
time is extended so that a maximum algorithmic error of
0.05 % is not
exceeded.
In the case of low-noise DUTs, the upper measurement time is limited
to 200
ms (corresponding to 2 periods at 10 Hz).
Signal-to-Noise Measurements