Rohde & Schwarz R&S UPP, Руководство пользователя

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Instrument Functions
R&S
®
UPP
359 User Manual 1411.1055.32 ─ 10
Since only a finite number of traces (i.e. the last 20 traces) can be stored in multi-scan
mode, all the traces only remain visible until rescaling is performed. When rescaling is
performed, the graphical display is deleted and the most recent traces are replotted
making the graph easier to read. The number of traces to be replotted can be set in the
"History" entry field.
5.21 Level Measurements
The R&S UPP provides various level measurements which can be used to determine
the AC or DC voltage component of a measurement signal using various methods.
●
"RMS" determines the RMS of any given signal using a broadband analysis,
optionally with suppression of a DC component contained in the signal.
●
"RMS Selective" determines the RMS of a specific frequency inside or outside a
selectable frequency band (by using a bandpass filter or a bandstop filter). Once
again, it is possible to suppress a DC component contained in the signal.
●
Level Monitor in the DC setting determines the DC component of any signal.
●
"Peak" determines the peak value of any given signal, the measured value
changes with the peak value without a delay.
The voltage of an analog signal is determined in volts and the amplitude of a digital sig-
nal is determined in FS. According to AES-17, a full-scale digital sine-wave signal has
a peak value and an RMS of 1.0 FS, i.e. in contrast to the analog signal, the RMS
determined for a digital signal is higher by a factor of √2.
Level measurement is also possible using the FFT analysis by means of integration via
the frequency lines. If the FFT measurement function is selected, the RMS value calcu-
lated by this method is shown as a function measured value, and the measurement
bandwidth can be restricted using the parameter fields "Freq Limit ", followed by "Freq
Lim Low " and "Freq Lim Upp ".
The interval during which the level of the measurement signal is monitored can be
specified by the user as the measurement time or the interval time.
Other digital filters - besides the input filter - can also be looped into the measurement
path for AC measurements.
5.21.1 Filter Settings
DC Suppress
Used to activate DC suppression (only with RMS measurements in the digital ana-
lyzer).
Level Measurements