R&S WinIQSIM2 Software Manual - Rohde & Schwarz

R&S ® WinIQSIM2
Graphical User Interface
Baseband Block
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By "Cut Off Frequency Shift" = 0, the -3 dB point is at the frequency determined by
the half of the selected "Sample Rate".
User filter
The user filter file must have extention *.vaf and can be created with the R&S filter
wizard.
The filter wizard (filtwiz) is a tool from Rohde & Schwarz designed for creating filter files
that can be imported on a R&S WinIQSIM2. Its main purpose is the conversion of userdefined
finite impulse response (FIR) filters into the filter format (*.vaf). Beyond this
filtwiz provides designs for standard filters, e.g. Root Raised Cosine, Gaussian.
The program was developed on a 32-bit Microsoft Windows platform under MATLAB.
For more information, refer to the description "Introduction to "filtwiz" Filter Editor" on the
Rohde&Schwarz Internet page.
5.10.2.4 Conflicting Settings - Custom Digital Mod
Having selected a modulation procedure, not every combination is possible when selecting
the settings for the modulation parameters "Symbol Rate" and "Coding". These
restrictions inevitably give rise to conflicting settings if a parameter is changed and leads
to a prohibited combination.
A conflicting setting is indicated by a message on the Info line in the display. The R&S
WinIQSIM2 displays the setting entered by the user, but the modulation signal actually
generated does not correspond to this display. A conflict of settings can be triggered if
the user changes a parameter inappropriately. The message disappears as soon as a
conflict-free setting is entered.
5.10.2.5 Custom Digital Mod User Interface
The menu for setting digital modulation can be opened either in the "Baseband" block or
in the menu tree under "Baseband".
The "Custom Digital Modulation" menu enables direct selection of the data source,
standard, symbol rate, coding, modulation type and filter. All other settings are entered
in submenus which are called via "More" buttons.
The upper part of the menu is used for powering up digital modulation as well as for calling
the default settings and user-defined standards.
The "Generate Waveform File" opens the submenu for storing the current signal in a
waveform file.
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