Configuring the Internal Baseband Source
R&S
®
SMW200A
345User Manual 1175.6632.02 ─ 30
Manual operation: See "Select Ramp to Edit" on page 283
5.8 Generating Notched Signals
If your instrument is equipped with the R&S SMW-K811, you can apply notched filter.
In the following, the notched filter settings are described based on the ARB functional-
ity. The described settings also apply for:
●
EUTRA/LTE
●
DVB-H/T, DVB-S2/S2X
●
OFDM Signal Generation
●
OneWeb
5.8.1 Required Options
The basic equipment layout for the generation of notched signals includes the following
options:
●
Standard or wideband baseband generator (R&S SMW-B10/-B9)
●
Baseband main module (R&S SMW-B13) or wideband baseband main module
(R&S SMW-B13XT)
●
Option Notched Signals (R&S SMW-K811), per signal path
Sufficient for the generation of notched signals with the ARB
For the generation of notched signals with one of the digital standards, also the
corresponding option:
– Option EUTRA/LTE (R&S SMW-K55), per signal path
– Option DVB-H/T (R&S SMW-K52), per signal path
– Option OFDM Signal Generation (R&S SMW-K114), per signal path
– Option OneWeb User-Defined Signal Generation, OneWeb Reference Signals
(R&S SMW-K130/-K355), per signal path
●
Frequency option (e.g. R&S SMW-B1003)
For more information, see data sheet.
5.8.2 About the Notch Filters
The noise power ratio (NPR) measurement is a method for evaluating the linearity of
wideband-amplifiers. The NPR measurement use notched filters that are applied on
internally or externally created waveforms.
The R&S SMW equipped with the R&S SMW-K811 option allows you to define up to 25
notches. You can define the frequency offset and bandwidth of each notch individually.
You can use frequency values with fixed resolution, where the resolution step depends
on the used Clock Frequency.
Generating Notched Signals
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