Rohde & Schwarz R&S UPP, Руководство пользователя

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Instrument Functions
R&S
®
UPP
364 User Manual 1411.1055.32 ─ 10
depending on whether "DC Suppress" is activated or deactivated, a superimposed DC
component is measured (deactivated) or suppressed (activated).
If a bandpass filter is used, the desired frequency component is measured; if a band-
stop filter is used, this component is suppressed. Any given signal shape can be mea-
sured.
For more settings, see Chapter 5.21, "Level Measurements" , on page 359.
Function (RMS, selective)
Selection of RMS measurement selective.
Remote command:
SENSe[1]:FUNCtion RMSSelect
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. To prevent measurement errors, such signals should
therefore be measured using "Gen Track" or (if an external generator is used) using
the "Value" measurement mode.
"Auto Fast" Where possible, the RMS measurement is performed over entire AC
periods; with high frequencies, the measurement time is increased so
that the maximum algorithmic error does not exceed 1
%.
With very weak, low-frequency or pure DC signals, the maximum
measurement time is limited to 100
ms (corresponding to 1 period at
10 Hz).
Recommended for single-tone measurements using an unknown
external signal source if maximum measurement speed is desired.
Note: For infrasound measurements (below 10 Hz), can only be mea-
sured using a fixed measurement time (Value or Gen Track).
Level Measurements