Rohde & Schwarz R&S UPP, User Manual

Page: 430 / 938

Instrument Functions
R&S
®
UPP
414 User Manual 1411.1055.32 ─ 10
The time by which the channel specified as the "Ref Channel" in the Analyzer Config
Panel is to be offset relative to the other channels. If the delay of the other channels is
shorter than that of the "Ref Channel ", this can be compensated by entering a nega-
tive time.
The compensation of delay differences is particularly useful for phase measurements
since a time offset of both sample signals causes a frequency-dependent phase dis-
placement and can thus invalidate the phase measurement result.
Note: Delay compensation cannot be selected when the "Compressed" or "Undersam-
ple" waveform modes are used.
Remote command:
SENSe[1]:CHANnel:DELay
on page 762
DC Suppress
Used to activate DC suppression (in the digital analyzer only).
For DC suppression in the digital analyzer, the DC level is measured in the Monitor
level and subtracted from the input samples.
This parameter field is not available in the analog analyzer because the suppression
function is already provided by the AC coupling which can be set up using the hard-
ware.
"deactivated" DC suppression deactivated.
The DC component of the sample signal is not suppressed ("DC cou-
pling") and is included in the measurement result and the graphical
display.
Recommended when using a highpass or bandpass filter because
additional DC suppression is not necessary in these cases and would
increase the calculation time (slightly).
"activated" DC suppression activated.
The DC component of the sample signal is suppressed ("AC cou-
pling"); the measurement result and the graphical display only include
the AC component.
Remote command:
SENSe[1]:FUNCtion:DCSuppression
on page 757
Filter
2 separate filters can be looped into the measurement path. Apart from those filters
which can be user-defined in the filter panel, filters can also be selected from a set of
supplied weighting filters.
Selecting "OFF" deactivates the respective filter.
FFT Analysis