Rohde & Schwarz R&S UPP, User Manual

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Instrument Functions
R&S
®
UPP
375 User Manual 1411.1055.32 ─ 10
Remote command:
SENSe[1]:VOLTage:INTVtime:MODE
on page 756
SENSe[1]:VOLTage:INTVtime
on page 756
5.21.5 DC voltage measurement
Measurement of the DC voltage component of an analog or digital signal. The "DC
measurement" is not a separate measurement function, but a measurement method
that can be selected under "Level Monitor"). This makes it possible to perform any
other desired measurement function at the same time as a DC level measurement, see
"Level Monitor" on page 456
The level is acquired at the Monitor level, i.e. after the prefilter.
The measurement is performed using zero-crossing detection to eliminate the level
component of any superimposed periodic AC signal that may be present. As a result,
the measurement time is not constant, but instead is an integer multiple of the period of
the superimposed AC signal.
In the case of very weak signals or signals with no AC component, the upper measure-
ment time limit is 100
ms.
If "DC" is selected as a measurement function, a reference to the Level Monitor is
shown and the previously configured measurement function is maintained.
Function (DC)
Selection of DC voltage measurement.
Remote command:
SENSe[1]:FUNCtion DC
5.22 Signal-to-Noise Measurements
The R&S UPP provides signal-to-noise measurements ("", "S/N measurements")
according to a number of different weighting methods. Each of these measurement
functions measures the level with and without a signal: For measurement of the signal
the set generator signal is output; for noise measurement the generator signal is turned
off and the noise level of the DUT is measured. The measured signal-to-noise ratio is
displayed as the measurement result.
The S/N sequence consists of two complete level measurement cycles that are per-
formed and displayed independently of one another.
●
The measured values for level monitor, input monitor, post FFT and waveform are
displayed for signal measurement first, and then for noise measurement.
●
The frequency and phase are measured only during signal measurement. The
measured values remain unchanged during noise measurement.
●
The result of the function can be determined only at the end of noise measure-
ment. In continuous measurement mode the display shows the latest valid result or
"---" during signal measurement.
Signal-to-Noise Measurements